FFmpeg
movenc.c
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1 /*
2  * MOV, 3GP, MP4 muxer
3  * Copyright (c) 2003 Thomas Raivio
4  * Copyright (c) 2004 Gildas Bazin <gbazin at videolan dot org>
5  * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
6  *
7  * This file is part of FFmpeg.
8  *
9  * FFmpeg is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * FFmpeg is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with FFmpeg; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22  */
23 
24 #include <stdint.h>
25 #include <inttypes.h>
26 
27 #include "movenc.h"
28 #include "avformat.h"
29 #include "avio_internal.h"
30 #include "riff.h"
31 #include "avio.h"
32 #include "isom.h"
33 #include "av1.h"
34 #include "avc.h"
35 #include "libavcodec/ac3_parser_internal.h"
36 #include "libavcodec/dnxhddata.h"
37 #include "libavcodec/flac.h"
38 #include "libavcodec/get_bits.h"
39 
40 #include "libavcodec/internal.h"
41 #include "libavcodec/put_bits.h"
42 #include "libavcodec/vc1_common.h"
43 #include "libavcodec/raw.h"
44 #include "internal.h"
45 #include "libavutil/avstring.h"
46 #include "libavutil/intfloat.h"
47 #include "libavutil/mathematics.h"
48 #include "libavutil/libm.h"
49 #include "libavutil/opt.h"
50 #include "libavutil/dict.h"
51 #include "libavutil/pixdesc.h"
52 #include "libavutil/stereo3d.h"
53 #include "libavutil/timecode.h"
54 #include "libavutil/dovi_meta.h"
55 #include "libavutil/color_utils.h"
56 #include "hevc.h"
57 #include "rtpenc.h"
58 #include "mov_chan.h"
59 #include "vpcc.h"
60 
61 static const AVOption options[] = {
62  { "movflags", "MOV muxer flags", offsetof(MOVMuxContext, flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
63  { "rtphint", "Add RTP hint tracks", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_RTP_HINT}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
64  { "moov_size", "maximum moov size so it can be placed at the begin", offsetof(MOVMuxContext, reserved_moov_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, 0 },
65  { "empty_moov", "Make the initial moov atom empty", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_EMPTY_MOOV}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
66  { "frag_keyframe", "Fragment at video keyframes", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_FRAG_KEYFRAME}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
67  { "frag_every_frame", "Fragment at every frame", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_FRAG_EVERY_FRAME}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
68  { "separate_moof", "Write separate moof/mdat atoms for each track", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_SEPARATE_MOOF}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
69  { "frag_custom", "Flush fragments on caller requests", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_FRAG_CUSTOM}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
70  { "isml", "Create a live smooth streaming feed (for pushing to a publishing point)", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_ISML}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
71  { "faststart", "Run a second pass to put the index (moov atom) at the beginning of the file", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_FASTSTART}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
72  { "omit_tfhd_offset", "Omit the base data offset in tfhd atoms", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_OMIT_TFHD_OFFSET}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
73  { "disable_chpl", "Disable Nero chapter atom", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_DISABLE_CHPL}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
74  { "default_base_moof", "Set the default-base-is-moof flag in tfhd atoms", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_DEFAULT_BASE_MOOF}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
75  { "dash", "Write DASH compatible fragmented MP4", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_DASH}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
76  { "cmaf", "Write CMAF compatible fragmented MP4", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_CMAF}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
77  { "frag_discont", "Signal that the next fragment is discontinuous from earlier ones", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_FRAG_DISCONT}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
78  { "delay_moov", "Delay writing the initial moov until the first fragment is cut, or until the first fragment flush", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_DELAY_MOOV}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
79  { "global_sidx", "Write a global sidx index at the start of the file", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_GLOBAL_SIDX}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
80  { "skip_sidx", "Skip writing of sidx atom", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_SKIP_SIDX}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
81  { "write_colr", "Write colr atom even if the color info is unspecified (Experimental, may be renamed or changed, do not use from scripts)", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_WRITE_COLR}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
82  { "prefer_icc", "If writing colr atom prioritise usage of ICC profile if it exists in stream packet side data", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_PREFER_ICC}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
83  { "write_gama", "Write deprecated gama atom", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_WRITE_GAMA}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
84  { "use_metadata_tags", "Use mdta atom for metadata.", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_USE_MDTA}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
85  { "skip_trailer", "Skip writing the mfra/tfra/mfro trailer for fragmented files", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_SKIP_TRAILER}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
86  { "negative_cts_offsets", "Use negative CTS offsets (reducing the need for edit lists)", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_NEGATIVE_CTS_OFFSETS}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
87  FF_RTP_FLAG_OPTS(MOVMuxContext, rtp_flags),
88  { "skip_iods", "Skip writing iods atom.", offsetof(MOVMuxContext, iods_skip), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM},
89  { "iods_audio_profile", "iods audio profile atom.", offsetof(MOVMuxContext, iods_audio_profile), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 255, AV_OPT_FLAG_ENCODING_PARAM},
90  { "iods_video_profile", "iods video profile atom.", offsetof(MOVMuxContext, iods_video_profile), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 255, AV_OPT_FLAG_ENCODING_PARAM},
91  { "frag_duration", "Maximum fragment duration", offsetof(MOVMuxContext, max_fragment_duration), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
92  { "min_frag_duration", "Minimum fragment duration", offsetof(MOVMuxContext, min_fragment_duration), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
93  { "frag_size", "Maximum fragment size", offsetof(MOVMuxContext, max_fragment_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
94  { "ism_lookahead", "Number of lookahead entries for ISM files", offsetof(MOVMuxContext, ism_lookahead), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 255, AV_OPT_FLAG_ENCODING_PARAM},
95  { "video_track_timescale", "set timescale of all video tracks", offsetof(MOVMuxContext, video_track_timescale), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
96  { "brand", "Override major brand", offsetof(MOVMuxContext, major_brand), AV_OPT_TYPE_STRING, {.str = NULL}, .flags = AV_OPT_FLAG_ENCODING_PARAM },
97  { "use_editlist", "use edit list", offsetof(MOVMuxContext, use_editlist), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, AV_OPT_FLAG_ENCODING_PARAM},
98  { "fragment_index", "Fragment number of the next fragment", offsetof(MOVMuxContext, fragments), AV_OPT_TYPE_INT, {.i64 = 1}, 1, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
99  { "mov_gamma", "gamma value for gama atom", offsetof(MOVMuxContext, gamma), AV_OPT_TYPE_FLOAT, {.dbl = 0.0 }, 0.0, 10, AV_OPT_FLAG_ENCODING_PARAM},
100  { "frag_interleave", "Interleave samples within fragments (max number of consecutive samples, lower is tighter interleaving, but with more overhead)", offsetof(MOVMuxContext, frag_interleave), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
101  { "encryption_scheme", "Configures the encryption scheme, allowed values are none, cenc-aes-ctr", offsetof(MOVMuxContext, encryption_scheme_str), AV_OPT_TYPE_STRING, {.str = NULL}, .flags = AV_OPT_FLAG_ENCODING_PARAM },
102  { "encryption_key", "The media encryption key (hex)", offsetof(MOVMuxContext, encryption_key), AV_OPT_TYPE_BINARY, .flags = AV_OPT_FLAG_ENCODING_PARAM },
103  { "encryption_kid", "The media encryption key identifier (hex)", offsetof(MOVMuxContext, encryption_kid), AV_OPT_TYPE_BINARY, .flags = AV_OPT_FLAG_ENCODING_PARAM },
104  { "use_stream_ids_as_track_ids", "use stream ids as track ids", offsetof(MOVMuxContext, use_stream_ids_as_track_ids), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM},
105  { "write_tmcd", "force or disable writing tmcd", offsetof(MOVMuxContext, write_tmcd), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, AV_OPT_FLAG_ENCODING_PARAM},
106  { "write_prft", "Write producer reference time box with specified time source", offsetof(MOVMuxContext, write_prft), AV_OPT_TYPE_INT, {.i64 = MOV_PRFT_NONE}, 0, MOV_PRFT_NB-1, AV_OPT_FLAG_ENCODING_PARAM, "prft"},
107  { "wallclock", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = MOV_PRFT_SRC_WALLCLOCK}, 0, 0, AV_OPT_FLAG_ENCODING_PARAM, "prft"},
108  { "pts", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = MOV_PRFT_SRC_PTS}, 0, 0, AV_OPT_FLAG_ENCODING_PARAM, "prft"},
109  { "empty_hdlr_name", "write zero-length name string in hdlr atoms within mdia and minf atoms", offsetof(MOVMuxContext, empty_hdlr_name), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM},
110  { NULL },
111 };
112 
113 #define MOV_CLASS(flavor)\
114 static const AVClass flavor ## _muxer_class = {\
115  .class_name = #flavor " muxer",\
116  .item_name = av_default_item_name,\
117  .option = options,\
118  .version = LIBAVUTIL_VERSION_INT,\
119 };
120 
121 static int get_moov_size(AVFormatContext *s);
122 
123 static int utf8len(const uint8_t *b)
124 {
125  int len = 0;
126  int val;
127  while (*b) {
128  GET_UTF8(val, *b++, return -1;)
129  len++;
130  }
131  return len;
132 }
133 
134 //FIXME support 64 bit variant with wide placeholders
135 static int64_t update_size(AVIOContext *pb, int64_t pos)
136 {
137  int64_t curpos = avio_tell(pb);
138  avio_seek(pb, pos, SEEK_SET);
139  avio_wb32(pb, curpos - pos); /* rewrite size */
140  avio_seek(pb, curpos, SEEK_SET);
141 
142  return curpos - pos;
143 }
144 
145 static int co64_required(const MOVTrack *track)
146 {
147  if (track->entry > 0 && track->cluster[track->entry - 1].pos + track->data_offset > UINT32_MAX)
148  return 1;
149  return 0;
150 }
151 
152 static int is_cover_image(const AVStream *st)
153 {
154  /* Eg. AV_DISPOSITION_ATTACHED_PIC | AV_DISPOSITION_TIMED_THUMBNAILS
155  * is encoded as sparse video track */
156  return st && st->disposition == AV_DISPOSITION_ATTACHED_PIC;
157 }
158 
159 static int rtp_hinting_needed(const AVStream *st)
160 {
161  /* Add hint tracks for each real audio and video stream */
162  if (is_cover_image(st))
163  return 0;
164  return st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO ||
165  st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO;
166 }
167 
168 /* Chunk offset atom */
169 static int mov_write_stco_tag(AVIOContext *pb, MOVTrack *track)
170 {
171  int i;
172  int mode64 = co64_required(track); // use 32 bit size variant if possible
173  int64_t pos = avio_tell(pb);
174  avio_wb32(pb, 0); /* size */
175  if (mode64)
176  ffio_wfourcc(pb, "co64");
177  else
178  ffio_wfourcc(pb, "stco");
179  avio_wb32(pb, 0); /* version & flags */
180  avio_wb32(pb, track->chunkCount); /* entry count */
181  for (i = 0; i < track->entry; i++) {
182  if (!track->cluster[i].chunkNum)
183  continue;
184  if (mode64 == 1)
185  avio_wb64(pb, track->cluster[i].pos + track->data_offset);
186  else
187  avio_wb32(pb, track->cluster[i].pos + track->data_offset);
188  }
189  return update_size(pb, pos);
190 }
191 
192 /* Sample size atom */
193 static int mov_write_stsz_tag(AVIOContext *pb, MOVTrack *track)
194 {
195  int equalChunks = 1;
196  int i, j, entries = 0, tst = -1, oldtst = -1;
197 
198  int64_t pos = avio_tell(pb);
199  avio_wb32(pb, 0); /* size */
200  ffio_wfourcc(pb, "stsz");
201  avio_wb32(pb, 0); /* version & flags */
202 
203  for (i = 0; i < track->entry; i++) {
204  tst = track->cluster[i].size / track->cluster[i].entries;
205  if (oldtst != -1 && tst != oldtst)
206  equalChunks = 0;
207  oldtst = tst;
208  entries += track->cluster[i].entries;
209  }
210  if (equalChunks && track->entry) {
211  int sSize = track->entry ? track->cluster[0].size / track->cluster[0].entries : 0;
212  sSize = FFMAX(1, sSize); // adpcm mono case could make sSize == 0
213  avio_wb32(pb, sSize); // sample size
214  avio_wb32(pb, entries); // sample count
215  } else {
216  avio_wb32(pb, 0); // sample size
217  avio_wb32(pb, entries); // sample count
218  for (i = 0; i < track->entry; i++) {
219  for (j = 0; j < track->cluster[i].entries; j++) {
220  avio_wb32(pb, track->cluster[i].size /
221  track->cluster[i].entries);
222  }
223  }
224  }
225  return update_size(pb, pos);
226 }
227 
228 /* Sample to chunk atom */
229 static int mov_write_stsc_tag(AVIOContext *pb, MOVTrack *track)
230 {
231  int index = 0, oldval = -1, i;
232  int64_t entryPos, curpos;
233 
234  int64_t pos = avio_tell(pb);
235  avio_wb32(pb, 0); /* size */
236  ffio_wfourcc(pb, "stsc");
237  avio_wb32(pb, 0); // version & flags
238  entryPos = avio_tell(pb);
239  avio_wb32(pb, track->chunkCount); // entry count
240  for (i = 0; i < track->entry; i++) {
241  if (oldval != track->cluster[i].samples_in_chunk && track->cluster[i].chunkNum) {
242  avio_wb32(pb, track->cluster[i].chunkNum); // first chunk
243  avio_wb32(pb, track->cluster[i].samples_in_chunk); // samples per chunk
244  avio_wb32(pb, 0x1); // sample description index
245  oldval = track->cluster[i].samples_in_chunk;
246  index++;
247  }
248  }
249  curpos = avio_tell(pb);
250  avio_seek(pb, entryPos, SEEK_SET);
251  avio_wb32(pb, index); // rewrite size
252  avio_seek(pb, curpos, SEEK_SET);
253 
254  return update_size(pb, pos);
255 }
256 
257 /* Sync sample atom */
258 static int mov_write_stss_tag(AVIOContext *pb, MOVTrack *track, uint32_t flag)
259 {
260  int64_t curpos, entryPos;
261  int i, index = 0;
262  int64_t pos = avio_tell(pb);
263  avio_wb32(pb, 0); // size
264  ffio_wfourcc(pb, flag == MOV_SYNC_SAMPLE ? "stss" : "stps");
265  avio_wb32(pb, 0); // version & flags
266  entryPos = avio_tell(pb);
267  avio_wb32(pb, track->entry); // entry count
268  for (i = 0; i < track->entry; i++) {
269  if (track->cluster[i].flags & flag) {
270  avio_wb32(pb, i + 1);
271  index++;
272  }
273  }
274  curpos = avio_tell(pb);
275  avio_seek(pb, entryPos, SEEK_SET);
276  avio_wb32(pb, index); // rewrite size
277  avio_seek(pb, curpos, SEEK_SET);
278  return update_size(pb, pos);
279 }
280 
281 /* Sample dependency atom */
282 static int mov_write_sdtp_tag(AVIOContext *pb, MOVTrack *track)
283 {
284  int i;
285  uint8_t leading, dependent, reference, redundancy;
286  int64_t pos = avio_tell(pb);
287  avio_wb32(pb, 0); // size
288  ffio_wfourcc(pb, "sdtp");
289  avio_wb32(pb, 0); // version & flags
290  for (i = 0; i < track->entry; i++) {
291  dependent = MOV_SAMPLE_DEPENDENCY_YES;
292  leading = reference = redundancy = MOV_SAMPLE_DEPENDENCY_UNKNOWN;
293  if (track->cluster[i].flags & MOV_DISPOSABLE_SAMPLE) {
294  reference = MOV_SAMPLE_DEPENDENCY_NO;
295  }
296  if (track->cluster[i].flags & MOV_SYNC_SAMPLE) {
297  dependent = MOV_SAMPLE_DEPENDENCY_NO;
298  }
299  avio_w8(pb, (leading << 6) | (dependent << 4) |
300  (reference << 2) | redundancy);
301  }
302  return update_size(pb, pos);
303 }
304 
305 static int mov_write_amr_tag(AVIOContext *pb, MOVTrack *track)
306 {
307  avio_wb32(pb, 0x11); /* size */
308  if (track->mode == MODE_MOV) ffio_wfourcc(pb, "samr");
309  else ffio_wfourcc(pb, "damr");
310  ffio_wfourcc(pb, "FFMP");
311  avio_w8(pb, 0); /* decoder version */
312 
313  avio_wb16(pb, 0x81FF); /* Mode set (all modes for AMR_NB) */
314  avio_w8(pb, 0x00); /* Mode change period (no restriction) */
315  avio_w8(pb, 0x01); /* Frames per sample */
316  return 0x11;
317 }
318 
319 static int mov_write_ac3_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
320 {
321  GetBitContext gbc;
322  PutBitContext pbc;
323  uint8_t buf[3];
324  int fscod, bsid, bsmod, acmod, lfeon, frmsizecod;
325 
326  if (track->vos_len < 7) {
327  av_log(s, AV_LOG_ERROR,
328  "Cannot write moov atom before AC3 packets."
329  " Set the delay_moov flag to fix this.\n");
330  return AVERROR(EINVAL);
331  }
332 
333  avio_wb32(pb, 11);
334  ffio_wfourcc(pb, "dac3");
335 
336  init_get_bits(&gbc, track->vos_data + 4, (track->vos_len - 4) * 8);
337  fscod = get_bits(&gbc, 2);
338  frmsizecod = get_bits(&gbc, 6);
339  bsid = get_bits(&gbc, 5);
340  bsmod = get_bits(&gbc, 3);
341  acmod = get_bits(&gbc, 3);
342  if (acmod == 2) {
343  skip_bits(&gbc, 2); // dsurmod
344  } else {
345  if ((acmod & 1) && acmod != 1)
346  skip_bits(&gbc, 2); // cmixlev
347  if (acmod & 4)
348  skip_bits(&gbc, 2); // surmixlev
349  }
350  lfeon = get_bits1(&gbc);
351 
352  init_put_bits(&pbc, buf, sizeof(buf));
353  put_bits(&pbc, 2, fscod);
354  put_bits(&pbc, 5, bsid);
355  put_bits(&pbc, 3, bsmod);
356  put_bits(&pbc, 3, acmod);
357  put_bits(&pbc, 1, lfeon);
358  put_bits(&pbc, 5, frmsizecod >> 1); // bit_rate_code
359  put_bits(&pbc, 5, 0); // reserved
360 
361  flush_put_bits(&pbc);
362  avio_write(pb, buf, sizeof(buf));
363 
364  return 11;
365 }
366 
367 struct eac3_info {
368  AVPacket *pkt;
369  uint8_t ec3_done;
370  uint8_t num_blocks;
371 
372  /* Layout of the EC3SpecificBox */
373  /* maximum bitrate */
374  uint16_t data_rate;
375  /* number of independent substreams */
376  uint8_t num_ind_sub;
377  struct {
378  /* sample rate code (see ff_ac3_sample_rate_tab) 2 bits */
379  uint8_t fscod;
380  /* bit stream identification 5 bits */
381  uint8_t bsid;
382  /* one bit reserved */
383  /* audio service mixing (not supported yet) 1 bit */
384  /* bit stream mode 3 bits */
385  uint8_t bsmod;
386  /* audio coding mode 3 bits */
387  uint8_t acmod;
388  /* sub woofer on 1 bit */
389  uint8_t lfeon;
390  /* 3 bits reserved */
391  /* number of dependent substreams associated with this substream 4 bits */
392  uint8_t num_dep_sub;
393  /* channel locations of the dependent substream(s), if any, 9 bits */
394  uint16_t chan_loc;
395  /* if there is no dependent substream, then one bit reserved instead */
396  } substream[1]; /* TODO: support 8 independent substreams */
397 };
398 
399 #if CONFIG_AC3_PARSER
400 static int handle_eac3(MOVMuxContext *mov, AVPacket *pkt, MOVTrack *track)
401 {
402  AC3HeaderInfo *hdr = NULL;
403  struct eac3_info *info;
404  int num_blocks, ret;
405 
406  if (!track->eac3_priv && !(track->eac3_priv = av_mallocz(sizeof(*info))))
407  return AVERROR(ENOMEM);
408  info = track->eac3_priv;
409 
410  if (!info->pkt && !(info->pkt = av_packet_alloc()))
411  return AVERROR(ENOMEM);
412 
413  if (avpriv_ac3_parse_header(&hdr, pkt->data, pkt->size) < 0) {
414  /* drop the packets until we see a good one */
415  if (!track->entry) {
416  av_log(mov->fc, AV_LOG_WARNING, "Dropping invalid packet from start of the stream\n");
417  ret = 0;
418  } else
419  ret = AVERROR_INVALIDDATA;
420  goto end;
421  }
422 
423  info->data_rate = FFMAX(info->data_rate, hdr->bit_rate / 1000);
424  num_blocks = hdr->num_blocks;
425 
426  if (!info->ec3_done) {
427  /* AC-3 substream must be the first one */
428  if (hdr->bitstream_id <= 10 && hdr->substreamid != 0) {
429  ret = AVERROR(EINVAL);
430  goto end;
431  }
432 
433  /* this should always be the case, given that our AC-3 parser
434  * concatenates dependent frames to their independent parent */
435  if (hdr->frame_type == EAC3_FRAME_TYPE_INDEPENDENT) {
436  /* substream ids must be incremental */
437  if (hdr->substreamid > info->num_ind_sub + 1) {
438  ret = AVERROR(EINVAL);
439  goto end;
440  }
441 
442  if (hdr->substreamid == info->num_ind_sub + 1) {
443  //info->num_ind_sub++;
444  avpriv_request_sample(mov->fc, "Multiple independent substreams");
445  ret = AVERROR_PATCHWELCOME;
446  goto end;
447  } else if (hdr->substreamid < info->num_ind_sub ||
448  hdr->substreamid == 0 && info->substream[0].bsid) {
449  info->ec3_done = 1;
450  goto concatenate;
451  }
452  } else {
453  if (hdr->substreamid != 0) {
454  avpriv_request_sample(mov->fc, "Multiple non EAC3 independent substreams");
455  ret = AVERROR_PATCHWELCOME;
456  goto end;
457  }
458  }
459 
460  /* fill the info needed for the "dec3" atom */
461  info->substream[hdr->substreamid].fscod = hdr->sr_code;
462  info->substream[hdr->substreamid].bsid = hdr->bitstream_id;
463  info->substream[hdr->substreamid].bsmod = hdr->bitstream_mode;
464  info->substream[hdr->substreamid].acmod = hdr->channel_mode;
465  info->substream[hdr->substreamid].lfeon = hdr->lfe_on;
466 
467  /* Parse dependent substream(s), if any */
468  if (pkt->size != hdr->frame_size) {
469  int cumul_size = hdr->frame_size;
470  int parent = hdr->substreamid;
471 
472  while (cumul_size != pkt->size) {
473  GetBitContext gbc;
474  int i;
475  ret = avpriv_ac3_parse_header(&hdr, pkt->data + cumul_size, pkt->size - cumul_size);
476  if (ret < 0)
477  goto end;
478  if (hdr->frame_type != EAC3_FRAME_TYPE_DEPENDENT) {
479  ret = AVERROR(EINVAL);
480  goto end;
481  }
482  info->substream[parent].num_dep_sub++;
483  ret /= 8;
484 
485  /* header is parsed up to lfeon, but custom channel map may be needed */
486  init_get_bits8(&gbc, pkt->data + cumul_size + ret, pkt->size - cumul_size - ret);
487  /* skip bsid */
488  skip_bits(&gbc, 5);
489  /* skip volume control params */
490  for (i = 0; i < (hdr->channel_mode ? 1 : 2); i++) {
491  skip_bits(&gbc, 5); // skip dialog normalization
492  if (get_bits1(&gbc)) {
493  skip_bits(&gbc, 8); // skip compression gain word
494  }
495  }
496  /* get the dependent stream channel map, if exists */
497  if (get_bits1(&gbc))
498  info->substream[parent].chan_loc |= (get_bits(&gbc, 16) >> 5) & 0x1f;
499  else
500  info->substream[parent].chan_loc |= hdr->channel_mode;
501  cumul_size += hdr->frame_size;
502  }
503  }
504  }
505 
506 concatenate:
507  if (!info->num_blocks && num_blocks == 6) {
508  ret = pkt->size;
509  goto end;
510  }
511  else if (info->num_blocks + num_blocks > 6) {
512  ret = AVERROR_INVALIDDATA;
513  goto end;
514  }
515 
516  if (!info->num_blocks) {
517  ret = av_packet_ref(info->pkt, pkt);
518  if (!ret)
519  info->num_blocks = num_blocks;
520  goto end;
521  } else {
522  if ((ret = av_grow_packet(info->pkt, pkt->size)) < 0)
523  goto end;
524  memcpy(info->pkt->data + info->pkt->size - pkt->size, pkt->data, pkt->size);
525  info->num_blocks += num_blocks;
526  info->pkt->duration += pkt->duration;
527  if (info->num_blocks != 6)
528  goto end;
529  av_packet_unref(pkt);
530  av_packet_move_ref(pkt, info->pkt);
531  info->num_blocks = 0;
532  }
533  ret = pkt->size;
534 
535 end:
536  av_free(hdr);
537 
538  return ret;
539 }
540 #endif
541 
542 static int mov_write_eac3_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
543 {
544  PutBitContext pbc;
545  uint8_t *buf;
546  struct eac3_info *info;
547  int size, i;
548 
549  if (!track->eac3_priv) {
550  av_log(s, AV_LOG_ERROR,
551  "Cannot write moov atom before EAC3 packets parsed.\n");
552  return AVERROR(EINVAL);
553  }
554 
555  info = track->eac3_priv;
556  size = 2 + ((34 * (info->num_ind_sub + 1) + 7) >> 3);
557  buf = av_malloc(size);
558  if (!buf) {
559  return AVERROR(ENOMEM);
560  }
561 
562  init_put_bits(&pbc, buf, size);
563  put_bits(&pbc, 13, info->data_rate);
564  put_bits(&pbc, 3, info->num_ind_sub);
565  for (i = 0; i <= info->num_ind_sub; i++) {
566  put_bits(&pbc, 2, info->substream[i].fscod);
567  put_bits(&pbc, 5, info->substream[i].bsid);
568  put_bits(&pbc, 1, 0); /* reserved */
569  put_bits(&pbc, 1, 0); /* asvc */
570  put_bits(&pbc, 3, info->substream[i].bsmod);
571  put_bits(&pbc, 3, info->substream[i].acmod);
572  put_bits(&pbc, 1, info->substream[i].lfeon);
573  put_bits(&pbc, 5, 0); /* reserved */
574  put_bits(&pbc, 4, info->substream[i].num_dep_sub);
575  if (!info->substream[i].num_dep_sub) {
576  put_bits(&pbc, 1, 0); /* reserved */
577  } else {
578  put_bits(&pbc, 9, info->substream[i].chan_loc);
579  }
580  }
581  flush_put_bits(&pbc);
582  size = put_bits_count(&pbc) >> 3;
583 
584  avio_wb32(pb, size + 8);
585  ffio_wfourcc(pb, "dec3");
586  avio_write(pb, buf, size);
587 
588  av_free(buf);
589 
590  return size;
591 }
592 
593 /**
594  * This function writes extradata "as is".
595  * Extradata must be formatted like a valid atom (with size and tag).
596  */
597 static int mov_write_extradata_tag(AVIOContext *pb, MOVTrack *track)
598 {
599  avio_write(pb, track->par->extradata, track->par->extradata_size);
600  return track->par->extradata_size;
601 }
602 
603 static int mov_write_enda_tag(AVIOContext *pb)
604 {
605  avio_wb32(pb, 10);
606  ffio_wfourcc(pb, "enda");
607  avio_wb16(pb, 1); /* little endian */
608  return 10;
609 }
610 
611 static int mov_write_enda_tag_be(AVIOContext *pb)
612 {
613  avio_wb32(pb, 10);
614  ffio_wfourcc(pb, "enda");
615  avio_wb16(pb, 0); /* big endian */
616  return 10;
617 }
618 
619 static void put_descr(AVIOContext *pb, int tag, unsigned int size)
620 {
621  int i = 3;
622  avio_w8(pb, tag);
623  for (; i > 0; i--)
624  avio_w8(pb, (size >> (7 * i)) | 0x80);
625  avio_w8(pb, size & 0x7F);
626 }
627 
628 static unsigned compute_avg_bitrate(MOVTrack *track)
629 {
630  uint64_t size = 0;
631  int i;
632  if (!track->track_duration)
633  return 0;
634  for (i = 0; i < track->entry; i++)
635  size += track->cluster[i].size;
636  return size * 8 * track->timescale / track->track_duration;
637 }
638 
639 struct mpeg4_bit_rate_values {
640  uint32_t buffer_size; ///< Size of the decoding buffer for the elementary stream in bytes.
641  uint32_t max_bit_rate; ///< Maximum rate in bits/second over any window of one second.
642  uint32_t avg_bit_rate; ///< Average rate in bits/second over the entire presentation.
643 };
644 
645 static struct mpeg4_bit_rate_values calculate_mpeg4_bit_rates(MOVTrack *track)
646 {
647  AVCPBProperties *props = track->st ?
648  (AVCPBProperties*)av_stream_get_side_data(track->st,
649  AV_PKT_DATA_CPB_PROPERTIES,
650  NULL) :
651  NULL;
652  struct mpeg4_bit_rate_values bit_rates = { 0 };
653 
654  bit_rates.avg_bit_rate = compute_avg_bitrate(track);
655  if (!bit_rates.avg_bit_rate) {
656  // if the average bit rate cannot be calculated at this point, such as
657  // in the case of fragmented MP4, utilize the following values as
658  // fall-back in priority order:
659  //
660  // 1. average bit rate property
661  // 2. bit rate (usually average over the whole clip)
662  // 3. maximum bit rate property
663 
664  if (props && props->avg_bitrate) {
665  bit_rates.avg_bit_rate = props->avg_bitrate;
666  } else if (track->par->bit_rate) {
667  bit_rates.avg_bit_rate = track->par->bit_rate;
668  } else if (props && props->max_bitrate) {
669  bit_rates.avg_bit_rate = props->max_bitrate;
670  }
671  }
672 
673  // (FIXME should be max rate in any 1 sec window)
674  bit_rates.max_bit_rate = FFMAX(track->par->bit_rate,
675  bit_rates.avg_bit_rate);
676 
677  // utilize values from properties if we have them available
678  if (props) {
679  bit_rates.max_bit_rate = FFMAX(bit_rates.max_bit_rate,
680  props->max_bitrate);
681  bit_rates.buffer_size = props->buffer_size / 8;
682  }
683 
684  return bit_rates;
685 }
686 
687 static int mov_write_esds_tag(AVIOContext *pb, MOVTrack *track) // Basic
688 {
689  struct mpeg4_bit_rate_values bit_rates = calculate_mpeg4_bit_rates(track);
690  int64_t pos = avio_tell(pb);
691  int decoder_specific_info_len = track->vos_len ? 5 + track->vos_len : 0;
692 
693  avio_wb32(pb, 0); // size
694  ffio_wfourcc(pb, "esds");
695  avio_wb32(pb, 0); // Version
696 
697  // ES descriptor
698  put_descr(pb, 0x03, 3 + 5+13 + decoder_specific_info_len + 5+1);
699  avio_wb16(pb, track->track_id);
700  avio_w8(pb, 0x00); // flags (= no flags)
701 
702  // DecoderConfig descriptor
703  put_descr(pb, 0x04, 13 + decoder_specific_info_len);
704 
705  // Object type indication
706  if ((track->par->codec_id == AV_CODEC_ID_MP2 ||
707  track->par->codec_id == AV_CODEC_ID_MP3) &&
708  track->par->sample_rate > 24000)
709  avio_w8(pb, 0x6B); // 11172-3
710  else
711  avio_w8(pb, ff_codec_get_tag(ff_mp4_obj_type, track->par->codec_id));
712 
713  // the following fields is made of 6 bits to identify the streamtype (4 for video, 5 for audio)
714  // plus 1 bit to indicate upstream and 1 bit set to 1 (reserved)
715  if (track->par->codec_id == AV_CODEC_ID_DVD_SUBTITLE)
716  avio_w8(pb, (0x38 << 2) | 1); // flags (= NeroSubpicStream)
717  else if (track->par->codec_type == AVMEDIA_TYPE_AUDIO)
718  avio_w8(pb, 0x15); // flags (= Audiostream)
719  else
720  avio_w8(pb, 0x11); // flags (= Visualstream)
721 
722  avio_wb24(pb, bit_rates.buffer_size); // Buffersize DB
723  avio_wb32(pb, bit_rates.max_bit_rate); // maxbitrate
724  avio_wb32(pb, bit_rates.avg_bit_rate);
725 
726  if (track->vos_len) {
727  // DecoderSpecific info descriptor
728  put_descr(pb, 0x05, track->vos_len);
729  avio_write(pb, track->vos_data, track->vos_len);
730  }
731 
732  // SL descriptor
733  put_descr(pb, 0x06, 1);
734  avio_w8(pb, 0x02);
735  return update_size(pb, pos);
736 }
737 
738 static int mov_pcm_le_gt16(enum AVCodecID codec_id)
739 {
740  return codec_id == AV_CODEC_ID_PCM_S24LE ||
741  codec_id == AV_CODEC_ID_PCM_S32LE ||
742  codec_id == AV_CODEC_ID_PCM_F32LE ||
743  codec_id == AV_CODEC_ID_PCM_F64LE;
744 }
745 
746 static int mov_pcm_be_gt16(enum AVCodecID codec_id)
747 {
748  return codec_id == AV_CODEC_ID_PCM_S24BE ||
749  codec_id == AV_CODEC_ID_PCM_S32BE ||
750  codec_id == AV_CODEC_ID_PCM_F32BE ||
751  codec_id == AV_CODEC_ID_PCM_F64BE;
752 }
753 
754 static int mov_write_ms_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
755 {
756  int ret;
757  int64_t pos = avio_tell(pb);
758  avio_wb32(pb, 0);
759  avio_wl32(pb, track->tag); // store it byteswapped
760  track->par->codec_tag = av_bswap16(track->tag >> 16);
761  if ((ret = ff_put_wav_header(s, pb, track->par, 0)) < 0)
762  return ret;
763  return update_size(pb, pos);
764 }
765 
766 static int mov_write_wfex_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
767 {
768  int ret;
769  int64_t pos = avio_tell(pb);
770  avio_wb32(pb, 0);
771  ffio_wfourcc(pb, "wfex");
772  if ((ret = ff_put_wav_header(s, pb, track->st->codecpar, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX)) < 0)
773  return ret;
774  return update_size(pb, pos);
775 }
776 
777 static int mov_write_dfla_tag(AVIOContext *pb, MOVTrack *track)
778 {
779  int64_t pos = avio_tell(pb);
780  avio_wb32(pb, 0);
781  ffio_wfourcc(pb, "dfLa");
782  avio_w8(pb, 0); /* version */
783  avio_wb24(pb, 0); /* flags */
784 
785  /* Expect the encoder to pass a METADATA_BLOCK_TYPE_STREAMINFO. */
786  if (track->par->extradata_size != FLAC_STREAMINFO_SIZE)
787  return AVERROR_INVALIDDATA;
788 
789  /* TODO: Write other METADATA_BLOCK_TYPEs if the encoder makes them available. */
790  avio_w8(pb, 1 << 7 | FLAC_METADATA_TYPE_STREAMINFO); /* LastMetadataBlockFlag << 7 | BlockType */
791  avio_wb24(pb, track->par->extradata_size); /* Length */
792  avio_write(pb, track->par->extradata, track->par->extradata_size); /* BlockData[Length] */
793 
794  return update_size(pb, pos);
795 }
796 
797 static int mov_write_dops_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
798 {
799  int64_t pos = avio_tell(pb);
800  int channels, channel_map;
801  avio_wb32(pb, 0);
802  ffio_wfourcc(pb, "dOps");
803  avio_w8(pb, 0); /* Version */
804  if (track->par->extradata_size < 19) {
805  av_log(s, AV_LOG_ERROR, "invalid extradata size\n");
806  return AVERROR_INVALIDDATA;
807  }
808  /* extradata contains an Ogg OpusHead, other than byte-ordering and
809  OpusHead's preceeding magic/version, OpusSpecificBox is currently
810  identical. */
811  channels = AV_RB8(track->par->extradata + 9);
812  channel_map = AV_RB8(track->par->extradata + 18);
813 
814  avio_w8(pb, channels); /* OuputChannelCount */
815  avio_wb16(pb, AV_RL16(track->par->extradata + 10)); /* PreSkip */
816  avio_wb32(pb, AV_RL32(track->par->extradata + 12)); /* InputSampleRate */
817  avio_wb16(pb, AV_RL16(track->par->extradata + 16)); /* OutputGain */
818  avio_w8(pb, channel_map); /* ChannelMappingFamily */
819  /* Write the rest of the header out without byte-swapping. */
820  if (channel_map) {
821  if (track->par->extradata_size < 21 + channels) {
822  av_log(s, AV_LOG_ERROR, "invalid extradata size\n");
823  return AVERROR_INVALIDDATA;
824  }
825  avio_write(pb, track->par->extradata + 19, 2 + channels); /* ChannelMappingTable */
826  }
827 
828  return update_size(pb, pos);
829 }
830 
831 static int mov_write_dmlp_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
832 {
833  int64_t pos = avio_tell(pb);
834  int length;
835  avio_wb32(pb, 0);
836  ffio_wfourcc(pb, "dmlp");
837 
838  if (track->vos_len < 20) {
839  av_log(s, AV_LOG_ERROR,
840  "Cannot write moov atom before TrueHD packets."
841  " Set the delay_moov flag to fix this.\n");
842  return AVERROR(EINVAL);
843  }
844 
845  length = (AV_RB16(track->vos_data) & 0xFFF) * 2;
846  if (length < 20 || length > track->vos_len)
847  return AVERROR_INVALIDDATA;
848 
849  // Only TrueHD is supported
850  if (AV_RB32(track->vos_data + 4) != 0xF8726FBA)
851  return AVERROR_INVALIDDATA;
852 
853  avio_wb32(pb, AV_RB32(track->vos_data + 8)); /* format_info */
854  avio_wb16(pb, AV_RB16(track->vos_data + 18) << 1); /* peak_data_rate */
855  avio_wb32(pb, 0); /* reserved */
856 
857  return update_size(pb, pos);
858 }
859 
860 static int mov_write_chan_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
861 {
862  uint32_t layout_tag, bitmap;
863  int64_t pos = avio_tell(pb);
864 
865  layout_tag = ff_mov_get_channel_layout_tag(track->par->codec_id,
866  track->par->channel_layout,
867  &bitmap);
868  if (!layout_tag) {
869  av_log(s, AV_LOG_WARNING, "not writing 'chan' tag due to "
870  "lack of channel information\n");
871  return 0;
872  }
873 
874  if (track->multichannel_as_mono)
875  return 0;
876 
877  avio_wb32(pb, 0); // Size
878  ffio_wfourcc(pb, "chan"); // Type
879  avio_w8(pb, 0); // Version
880  avio_wb24(pb, 0); // Flags
881  avio_wb32(pb, layout_tag); // mChannelLayoutTag
882  avio_wb32(pb, bitmap); // mChannelBitmap
883  avio_wb32(pb, 0); // mNumberChannelDescriptions
884 
885  return update_size(pb, pos);
886 }
887 
888 static int mov_write_wave_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
889 {
890  int64_t pos = avio_tell(pb);
891 
892  avio_wb32(pb, 0); /* size */
893  ffio_wfourcc(pb, "wave");
894 
895  if (track->par->codec_id != AV_CODEC_ID_QDM2) {
896  avio_wb32(pb, 12); /* size */
897  ffio_wfourcc(pb, "frma");
898  avio_wl32(pb, track->tag);
899  }
900 
901  if (track->par->codec_id == AV_CODEC_ID_AAC) {
902  /* useless atom needed by mplayer, ipod, not needed by quicktime */
903  avio_wb32(pb, 12); /* size */
904  ffio_wfourcc(pb, "mp4a");
905  avio_wb32(pb, 0);
906  mov_write_esds_tag(pb, track);
907  } else if (mov_pcm_le_gt16(track->par->codec_id)) {
908  mov_write_enda_tag(pb);
909  } else if (mov_pcm_be_gt16(track->par->codec_id)) {
910  mov_write_enda_tag_be(pb);
911  } else if (track->par->codec_id == AV_CODEC_ID_AMR_NB) {
912  mov_write_amr_tag(pb, track);
913  } else if (track->par->codec_id == AV_CODEC_ID_AC3) {
914  mov_write_ac3_tag(s, pb, track);
915  } else if (track->par->codec_id == AV_CODEC_ID_EAC3) {
916  mov_write_eac3_tag(s, pb, track);
917  } else if (track->par->codec_id == AV_CODEC_ID_ALAC ||
918  track->par->codec_id == AV_CODEC_ID_QDM2) {
919  mov_write_extradata_tag(pb, track);
920  } else if (track->par->codec_id == AV_CODEC_ID_ADPCM_MS ||
921  track->par->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV) {
922  mov_write_ms_tag(s, pb, track);
923  }
924 
925  avio_wb32(pb, 8); /* size */
926  avio_wb32(pb, 0); /* null tag */
927 
928  return update_size(pb, pos);
929 }
930 
931 static int mov_write_dvc1_structs(MOVTrack *track, uint8_t *buf)
932 {
933  uint8_t *unescaped;
934  const uint8_t *start, *next, *end = track->vos_data + track->vos_len;
935  int unescaped_size, seq_found = 0;
936  int level = 0, interlace = 0;
937  int packet_seq = track->vc1_info.packet_seq;
938  int packet_entry = track->vc1_info.packet_entry;
939  int slices = track->vc1_info.slices;
940  PutBitContext pbc;
941 
942  if (track->start_dts == AV_NOPTS_VALUE) {
943  /* No packets written yet, vc1_info isn't authoritative yet. */
944  /* Assume inline sequence and entry headers. */
945  packet_seq = packet_entry = 1;
946  av_log(NULL, AV_LOG_WARNING,
947  "moov atom written before any packets, unable to write correct "
948  "dvc1 atom. Set the delay_moov flag to fix this.\n");
949  }
950 
951  unescaped = av_mallocz(track->vos_len + AV_INPUT_BUFFER_PADDING_SIZE);
952  if (!unescaped)
953  return AVERROR(ENOMEM);
954  start = find_next_marker(track->vos_data, end);
955  for (next = start; next < end; start = next) {
956  GetBitContext gb;
957  int size;
958  next = find_next_marker(start + 4, end);
959  size = next - start - 4;
960  if (size <= 0)
961  continue;
962  unescaped_size = vc1_unescape_buffer(start + 4, size, unescaped);
963  init_get_bits(&gb, unescaped, 8 * unescaped_size);
964  if (AV_RB32(start) == VC1_CODE_SEQHDR) {
965  int profile = get_bits(&gb, 2);
966  if (profile != PROFILE_ADVANCED) {
967  av_free(unescaped);
968  return AVERROR(ENOSYS);
969  }
970  seq_found = 1;
971  level = get_bits(&gb, 3);
972  /* chromaformat, frmrtq_postproc, bitrtq_postproc, postprocflag,
973  * width, height */
974  skip_bits_long(&gb, 2 + 3 + 5 + 1 + 2*12);
975  skip_bits(&gb, 1); /* broadcast */
976  interlace = get_bits1(&gb);
977  skip_bits(&gb, 4); /* tfcntrflag, finterpflag, reserved, psf */
978  }
979  }
980  if (!seq_found) {
981  av_free(unescaped);
982  return AVERROR(ENOSYS);
983  }
984 
985  init_put_bits(&pbc, buf, 7);
986  /* VC1DecSpecStruc */
987  put_bits(&pbc, 4, 12); /* profile - advanced */
988  put_bits(&pbc, 3, level);
989  put_bits(&pbc, 1, 0); /* reserved */
990  /* VC1AdvDecSpecStruc */
991  put_bits(&pbc, 3, level);
992  put_bits(&pbc, 1, 0); /* cbr */
993  put_bits(&pbc, 6, 0); /* reserved */
994  put_bits(&pbc, 1, !interlace); /* no interlace */
995  put_bits(&pbc, 1, !packet_seq); /* no multiple seq */
996  put_bits(&pbc, 1, !packet_entry); /* no multiple entry */
997  put_bits(&pbc, 1, !slices); /* no slice code */
998  put_bits(&pbc, 1, 0); /* no bframe */
999  put_bits(&pbc, 1, 0); /* reserved */
1000 
1001  /* framerate */
1002  if (track->st->avg_frame_rate.num > 0 && track->st->avg_frame_rate.den > 0)
1003  put_bits32(&pbc, track->st->avg_frame_rate.num / track->st->avg_frame_rate.den);
1004  else
1005  put_bits32(&pbc, 0xffffffff);
1006 
1007  flush_put_bits(&pbc);
1008 
1009  av_free(unescaped);
1010 
1011  return 0;
1012 }
1013 
1014 static int mov_write_dvc1_tag(AVIOContext *pb, MOVTrack *track)
1015 {
1016  uint8_t buf[7] = { 0 };
1017  int ret;
1018 
1019  if ((ret = mov_write_dvc1_structs(track, buf)) < 0)
1020  return ret;
1021 
1022  avio_wb32(pb, track->vos_len + 8 + sizeof(buf));
1023  ffio_wfourcc(pb, "dvc1");
1024  avio_write(pb, buf, sizeof(buf));
1025  avio_write(pb, track->vos_data, track->vos_len);
1026 
1027  return 0;
1028 }
1029 
1030 static int mov_write_glbl_tag(AVIOContext *pb, MOVTrack *track)
1031 {
1032  avio_wb32(pb, track->vos_len + 8);
1033  ffio_wfourcc(pb, "glbl");
1034  avio_write(pb, track->vos_data, track->vos_len);
1035  return 8 + track->vos_len;
1036 }
1037 
1038 /**
1039  * Compute flags for 'lpcm' tag.
1040  * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1041  */
1042 static int mov_get_lpcm_flags(enum AVCodecID codec_id)
1043 {
1044  switch (codec_id) {
1045  case AV_CODEC_ID_PCM_F32BE:
1046  case AV_CODEC_ID_PCM_F64BE:
1047  return 11;
1048  case AV_CODEC_ID_PCM_F32LE:
1049  case AV_CODEC_ID_PCM_F64LE:
1050  return 9;
1051  case AV_CODEC_ID_PCM_U8:
1052  return 10;
1053  case AV_CODEC_ID_PCM_S16BE:
1054  case AV_CODEC_ID_PCM_S24BE:
1055  case AV_CODEC_ID_PCM_S32BE:
1056  return 14;
1057  case AV_CODEC_ID_PCM_S8:
1058  case AV_CODEC_ID_PCM_S16LE:
1059  case AV_CODEC_ID_PCM_S24LE:
1060  case AV_CODEC_ID_PCM_S32LE:
1061  return 12;
1062  default:
1063  return 0;
1064  }
1065 }
1066 
1067 static int get_cluster_duration(MOVTrack *track, int cluster_idx)
1068 {
1069  int64_t next_dts;
1070 
1071  if (cluster_idx >= track->entry)
1072  return 0;
1073 
1074  if (cluster_idx + 1 == track->entry)
1075  next_dts = track->track_duration + track->start_dts;
1076  else
1077  next_dts = track->cluster[cluster_idx + 1].dts;
1078 
1079  next_dts -= track->cluster[cluster_idx].dts;
1080 
1081  av_assert0(next_dts >= 0);
1082  av_assert0(next_dts <= INT_MAX);
1083 
1084  return next_dts;
1085 }
1086 
1087 static int get_samples_per_packet(MOVTrack *track)
1088 {
1089  int i, first_duration;
1090 
1091 // return track->par->frame_size;
1092 
1093  /* use 1 for raw PCM */
1094  if (!track->audio_vbr)
1095  return 1;
1096 
1097  /* check to see if duration is constant for all clusters */
1098  if (!track->entry)
1099  return 0;
1100  first_duration = get_cluster_duration(track, 0);
1101  for (i = 1; i < track->entry; i++) {
1102  if (get_cluster_duration(track, i) != first_duration)
1103  return 0;
1104  }
1105  return first_duration;
1106 }
1107 
1108 static int mov_write_btrt_tag(AVIOContext *pb, MOVTrack *track)
1109 {
1110  int64_t pos = avio_tell(pb);
1111  struct mpeg4_bit_rate_values bit_rates = calculate_mpeg4_bit_rates(track);
1112  if (!bit_rates.max_bit_rate && !bit_rates.avg_bit_rate &&
1113  !bit_rates.buffer_size)
1114  // no useful data to be written, skip
1115  return 0;
1116 
1117  avio_wb32(pb, 0); /* size */
1118  ffio_wfourcc(pb, "btrt");
1119 
1120  avio_wb32(pb, bit_rates.buffer_size);
1121  avio_wb32(pb, bit_rates.max_bit_rate);
1122  avio_wb32(pb, bit_rates.avg_bit_rate);
1123 
1124  return update_size(pb, pos);
1125 }
1126 
1127 static int mov_write_audio_tag(AVFormatContext *s, AVIOContext *pb, MOVMuxContext *mov, MOVTrack *track)
1128 {
1129  int64_t pos = avio_tell(pb);
1130  int version = 0;
1131  uint32_t tag = track->tag;
1132  int ret = 0;
1133 
1134  if (track->mode == MODE_MOV) {
1135  if (track->timescale > UINT16_MAX || !track->par->channels) {
1136  if (mov_get_lpcm_flags(track->par->codec_id))
1137  tag = AV_RL32("lpcm");
1138  version = 2;
1139  } else if (track->audio_vbr || mov_pcm_le_gt16(track->par->codec_id) ||
1140  mov_pcm_be_gt16(track->par->codec_id) ||
1141  track->par->codec_id == AV_CODEC_ID_ADPCM_MS ||
1142  track->par->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV ||
1143  track->par->codec_id == AV_CODEC_ID_QDM2) {
1144  version = 1;
1145  }
1146  }
1147 
1148  avio_wb32(pb, 0); /* size */
1149  if (mov->encryption_scheme != MOV_ENC_NONE) {
1150  ffio_wfourcc(pb, "enca");
1151  } else {
1152  avio_wl32(pb, tag); // store it byteswapped
1153  }
1154  avio_wb32(pb, 0); /* Reserved */
1155  avio_wb16(pb, 0); /* Reserved */
1156  avio_wb16(pb, 1); /* Data-reference index, XXX == 1 */
1157 
1158  /* SoundDescription */
1159  avio_wb16(pb, version); /* Version */
1160  avio_wb16(pb, 0); /* Revision level */
1161  avio_wb32(pb, 0); /* Reserved */
1162 
1163  if (version == 2) {
1164  avio_wb16(pb, 3);
1165  avio_wb16(pb, 16);
1166  avio_wb16(pb, 0xfffe);
1167  avio_wb16(pb, 0);
1168  avio_wb32(pb, 0x00010000);
1169  avio_wb32(pb, 72);
1170  avio_wb64(pb, av_double2int(track->par->sample_rate));
1171  avio_wb32(pb, track->par->channels);
1172  avio_wb32(pb, 0x7F000000);
1173  avio_wb32(pb, av_get_bits_per_sample(track->par->codec_id));
1174  avio_wb32(pb, mov_get_lpcm_flags(track->par->codec_id));
1175  avio_wb32(pb, track->sample_size);
1176  avio_wb32(pb, get_samples_per_packet(track));
1177  } else {
1178  if (track->mode == MODE_MOV) {
1179  avio_wb16(pb, track->par->channels);
1180  if (track->par->codec_id == AV_CODEC_ID_PCM_U8 ||
1181  track->par->codec_id == AV_CODEC_ID_PCM_S8)
1182  avio_wb16(pb, 8); /* bits per sample */
1183  else if (track->par->codec_id == AV_CODEC_ID_ADPCM_G726)
1184  avio_wb16(pb, track->par->bits_per_coded_sample);
1185  else
1186  avio_wb16(pb, 16);
1187  avio_wb16(pb, track->audio_vbr ? -2 : 0); /* compression ID */
1188  } else { /* reserved for mp4/3gp */
1189  if (track->par->codec_id == AV_CODEC_ID_FLAC ||
1190  track->par->codec_id == AV_CODEC_ID_ALAC ||
1191  track->par->codec_id == AV_CODEC_ID_OPUS) {
1192  avio_wb16(pb, track->par->channels);
1193  } else {
1194  avio_wb16(pb, 2);
1195  }
1196  if (track->par->codec_id == AV_CODEC_ID_FLAC ||
1197  track->par->codec_id == AV_CODEC_ID_ALAC) {
1198  avio_wb16(pb, track->par->bits_per_raw_sample);
1199  } else {
1200  avio_wb16(pb, 16);
1201  }
1202  avio_wb16(pb, 0);
1203  }
1204 
1205  avio_wb16(pb, 0); /* packet size (= 0) */
1206  if (track->par->codec_id == AV_CODEC_ID_OPUS)
1207  avio_wb16(pb, 48000);
1208  else if (track->par->codec_id == AV_CODEC_ID_TRUEHD)
1209  avio_wb32(pb, track->par->sample_rate);
1210  else
1211  avio_wb16(pb, track->par->sample_rate <= UINT16_MAX ?
1212  track->par->sample_rate : 0);
1213 
1214  if (track->par->codec_id != AV_CODEC_ID_TRUEHD)
1215  avio_wb16(pb, 0); /* Reserved */
1216  }
1217 
1218  if (version == 1) { /* SoundDescription V1 extended info */
1219  if (mov_pcm_le_gt16(track->par->codec_id) ||
1220  mov_pcm_be_gt16(track->par->codec_id))
1221  avio_wb32(pb, 1); /* must be 1 for uncompressed formats */
1222  else
1223  avio_wb32(pb, track->par->frame_size); /* Samples per packet */
1224  avio_wb32(pb, track->sample_size / track->par->channels); /* Bytes per packet */
1225  avio_wb32(pb, track->sample_size); /* Bytes per frame */
1226  avio_wb32(pb, 2); /* Bytes per sample */
1227  }
1228 
1229  if (track->mode == MODE_MOV &&
1230  (track->par->codec_id == AV_CODEC_ID_AAC ||
1231  track->par->codec_id == AV_CODEC_ID_AC3 ||
1232  track->par->codec_id == AV_CODEC_ID_EAC3 ||
1233  track->par->codec_id == AV_CODEC_ID_AMR_NB ||
1234  track->par->codec_id == AV_CODEC_ID_ALAC ||
1235  track->par->codec_id == AV_CODEC_ID_ADPCM_MS ||
1236  track->par->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV ||
1237  track->par->codec_id == AV_CODEC_ID_QDM2 ||
1238  (mov_pcm_le_gt16(track->par->codec_id) && version==1) ||
1239  (mov_pcm_be_gt16(track->par->codec_id) && version==1)))
1240  ret = mov_write_wave_tag(s, pb, track);
1241  else if (track->tag == MKTAG('m','p','4','a'))
1242  ret = mov_write_esds_tag(pb, track);
1243  else if (track->par->codec_id == AV_CODEC_ID_AMR_NB)
1244  ret = mov_write_amr_tag(pb, track);
1245  else if (track->par->codec_id == AV_CODEC_ID_AC3)
1246  ret = mov_write_ac3_tag(s, pb, track);
1247  else if (track->par->codec_id == AV_CODEC_ID_EAC3)
1248  ret = mov_write_eac3_tag(s, pb, track);
1249  else if (track->par->codec_id == AV_CODEC_ID_ALAC)
1250  ret = mov_write_extradata_tag(pb, track);
1251  else if (track->par->codec_id == AV_CODEC_ID_WMAPRO)
1252  ret = mov_write_wfex_tag(s, pb, track);
1253  else if (track->par->codec_id == AV_CODEC_ID_FLAC)
1254  ret = mov_write_dfla_tag(pb, track);
1255  else if (track->par->codec_id == AV_CODEC_ID_OPUS)
1256  ret = mov_write_dops_tag(s, pb, track);
1257  else if (track->par->codec_id == AV_CODEC_ID_TRUEHD)
1258  ret = mov_write_dmlp_tag(s, pb, track);
1259  else if (track->vos_len > 0)
1260  ret = mov_write_glbl_tag(pb, track);
1261 
1262  if (ret < 0)
1263  return ret;
1264 
1265  if (track->mode == MODE_MOV && track->par->codec_type == AVMEDIA_TYPE_AUDIO
1266  && ((ret = mov_write_chan_tag(s, pb, track)) < 0)) {
1267  return ret;
1268  }
1269 
1270  if (mov->encryption_scheme != MOV_ENC_NONE
1271  && ((ret = ff_mov_cenc_write_sinf_tag(track, pb, mov->encryption_kid)) < 0)) {
1272  return ret;
1273  }
1274 
1275  if (track->mode == MODE_MP4 &&
1276  ((ret = mov_write_btrt_tag(pb, track)) < 0))
1277  return ret;
1278 
1279  ret = update_size(pb, pos);
1280  return ret;
1281 }
1282 
1283 static int mov_write_d263_tag(AVIOContext *pb)
1284 {
1285  avio_wb32(pb, 0xf); /* size */
1286  ffio_wfourcc(pb, "d263");
1287  ffio_wfourcc(pb, "FFMP");
1288  avio_w8(pb, 0); /* decoder version */
1289  /* FIXME use AVCodecContext level/profile, when encoder will set values */
1290  avio_w8(pb, 0xa); /* level */
1291  avio_w8(pb, 0); /* profile */
1292  return 0xf;
1293 }
1294 
1295 static int mov_write_av1c_tag(AVIOContext *pb, MOVTrack *track)
1296 {
1297  int64_t pos = avio_tell(pb);
1298 
1299  avio_wb32(pb, 0);
1300  ffio_wfourcc(pb, "av1C");
1301  ff_isom_write_av1c(pb, track->vos_data, track->vos_len);
1302  return update_size(pb, pos);
1303 }
1304 
1305 static int mov_write_avcc_tag(AVIOContext *pb, MOVTrack *track)
1306 {
1307  int64_t pos = avio_tell(pb);
1308 
1309  avio_wb32(pb, 0);
1310  ffio_wfourcc(pb, "avcC");
1311  ff_isom_write_avcc(pb, track->vos_data, track->vos_len);
1312  return update_size(pb, pos);
1313 }
1314 
1315 static int mov_write_vpcc_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
1316 {
1317  int64_t pos = avio_tell(pb);
1318 
1319  avio_wb32(pb, 0);
1320  ffio_wfourcc(pb, "vpcC");
1321  avio_w8(pb, 1); /* version */
1322  avio_wb24(pb, 0); /* flags */
1323  ff_isom_write_vpcc(s, pb, track->par);
1324  return update_size(pb, pos);
1325 }
1326 
1327 static int mov_write_hvcc_tag(AVIOContext *pb, MOVTrack *track)
1328 {
1329  int64_t pos = avio_tell(pb);
1330 
1331  avio_wb32(pb, 0);
1332  ffio_wfourcc(pb, "hvcC");
1333  if (track->tag == MKTAG('h','v','c','1'))
1334  ff_isom_write_hvcc(pb, track->vos_data, track->vos_len, 1);
1335  else
1336  ff_isom_write_hvcc(pb, track->vos_data, track->vos_len, 0);
1337  return update_size(pb, pos);
1338 }
1339 
1340 /* also used by all avid codecs (dv, imx, meridien) and their variants */
1341 static int mov_write_avid_tag(AVIOContext *pb, MOVTrack *track)
1342 {
1343  int i;
1344  int interlaced;
1345  int cid;
1346  int display_width = track->par->width;
1347 
1348  if (track->vos_data && track->vos_len > 0x29) {
1349  if (ff_dnxhd_parse_header_prefix(track->vos_data) != 0) {
1350  /* looks like a DNxHD bit stream */
1351  interlaced = (track->vos_data[5] & 2);
1352  cid = AV_RB32(track->vos_data + 0x28);
1353  } else {
1354  av_log(NULL, AV_LOG_WARNING, "Could not locate DNxHD bit stream in vos_data\n");
1355  return 0;
1356  }
1357  } else {
1358  av_log(NULL, AV_LOG_WARNING, "Could not locate DNxHD bit stream, vos_data too small\n");
1359  return 0;
1360  }
1361 
1362  avio_wb32(pb, 24); /* size */
1363  ffio_wfourcc(pb, "ACLR");
1364  ffio_wfourcc(pb, "ACLR");
1365  ffio_wfourcc(pb, "0001");
1366  if (track->par->color_range == AVCOL_RANGE_MPEG || /* Legal range (16-235) */
1367  track->par->color_range == AVCOL_RANGE_UNSPECIFIED) {
1368  avio_wb32(pb, 1); /* Corresponds to 709 in official encoder */
1369  } else { /* Full range (0-255) */
1370  avio_wb32(pb, 2); /* Corresponds to RGB in official encoder */
1371  }
1372  avio_wb32(pb, 0); /* unknown */
1373 
1374  if (track->tag == MKTAG('A','V','d','h')) {
1375  avio_wb32(pb, 32);
1376  ffio_wfourcc(pb, "ADHR");
1377  ffio_wfourcc(pb, "0001");
1378  avio_wb32(pb, cid);
1379  avio_wb32(pb, 0); /* unknown */
1380  avio_wb32(pb, 1); /* unknown */
1381  avio_wb32(pb, 0); /* unknown */
1382  avio_wb32(pb, 0); /* unknown */
1383  return 0;
1384  }
1385 
1386  avio_wb32(pb, 24); /* size */
1387  ffio_wfourcc(pb, "APRG");
1388  ffio_wfourcc(pb, "APRG");
1389  ffio_wfourcc(pb, "0001");
1390  avio_wb32(pb, 1); /* unknown */
1391  avio_wb32(pb, 0); /* unknown */
1392 
1393  avio_wb32(pb, 120); /* size */
1394  ffio_wfourcc(pb, "ARES");
1395  ffio_wfourcc(pb, "ARES");
1396  ffio_wfourcc(pb, "0001");
1397  avio_wb32(pb, cid); /* dnxhd cid, some id ? */
1398  if ( track->par->sample_aspect_ratio.num > 0
1399  && track->par->sample_aspect_ratio.den > 0)
1400  display_width = display_width * track->par->sample_aspect_ratio.num / track->par->sample_aspect_ratio.den;
1401  avio_wb32(pb, display_width);
1402  /* values below are based on samples created with quicktime and avid codecs */
1403  if (interlaced) {
1404  avio_wb32(pb, track->par->height / 2);
1405  avio_wb32(pb, 2); /* unknown */
1406  avio_wb32(pb, 0); /* unknown */
1407  avio_wb32(pb, 4); /* unknown */
1408  } else {
1409  avio_wb32(pb, track->par->height);
1410  avio_wb32(pb, 1); /* unknown */
1411  avio_wb32(pb, 0); /* unknown */
1412  if (track->par->height == 1080)
1413  avio_wb32(pb, 5); /* unknown */
1414  else
1415  avio_wb32(pb, 6); /* unknown */
1416  }
1417  /* padding */
1418  for (i = 0; i < 10; i++)
1419  avio_wb64(pb, 0);
1420 
1421  return 0;
1422 }
1423 
1424 static int mov_write_dpxe_tag(AVIOContext *pb, MOVTrack *track)
1425 {
1426  avio_wb32(pb, 12);
1427  ffio_wfourcc(pb, "DpxE");
1428  if (track->par->extradata_size >= 12 &&
1429  !memcmp(&track->par->extradata[4], "DpxE", 4)) {
1430  avio_wb32(pb, track->par->extradata[11]);
1431  } else {
1432  avio_wb32(pb, 1);
1433  }
1434  return 0;
1435 }
1436 
1437 static int mov_get_dv_codec_tag(AVFormatContext *s, MOVTrack *track)
1438 {
1439  int tag;
1440 
1441  if (track->par->width == 720) { /* SD */
1442  if (track->par->height == 480) { /* NTSC */
1443  if (track->par->format == AV_PIX_FMT_YUV422P) tag = MKTAG('d','v','5','n');
1444  else tag = MKTAG('d','v','c',' ');
1445  }else if (track->par->format == AV_PIX_FMT_YUV422P) tag = MKTAG('d','v','5','p');
1446  else if (track->par->format == AV_PIX_FMT_YUV420P) tag = MKTAG('d','v','c','p');
1447  else tag = MKTAG('d','v','p','p');
1448  } else if (track->par->height == 720) { /* HD 720 line */
1449  if (track->st->time_base.den == 50) tag = MKTAG('d','v','h','q');
1450  else tag = MKTAG('d','v','h','p');
1451  } else if (track->par->height == 1080) { /* HD 1080 line */
1452  if (track->st->time_base.den == 25) tag = MKTAG('d','v','h','5');
1453  else tag = MKTAG('d','v','h','6');
1454  } else {
1455  av_log(s, AV_LOG_ERROR, "unsupported height for dv codec\n");
1456  return 0;
1457  }
1458 
1459  return tag;
1460 }
1461 
1462 static AVRational find_fps(AVFormatContext *s, AVStream *st)
1463 {
1464  AVRational rate = st->avg_frame_rate;
1465 
1466 #if FF_API_LAVF_AVCTX
1467  FF_DISABLE_DEPRECATION_WARNINGS
1468  rate = av_inv_q(st->codec->time_base);
1469  if (av_timecode_check_frame_rate(rate) < 0) {
1470  av_log(s, AV_LOG_DEBUG, "timecode: tbc=%d/%d invalid, fallback on %d/%d\n",
1471  rate.num, rate.den, st->avg_frame_rate.num, st->avg_frame_rate.den);
1472  rate = st->avg_frame_rate;
1473  }
1474  FF_ENABLE_DEPRECATION_WARNINGS
1475 #endif
1476 
1477  return rate;
1478 }
1479 
1480 static int defined_frame_rate(AVFormatContext *s, AVStream *st)
1481 {
1482  AVRational rational_framerate = find_fps(s, st);
1483  int rate = 0;
1484  if (rational_framerate.den != 0)
1485  rate = av_q2d(rational_framerate);
1486  return rate;
1487 }
1488 
1489 static int mov_get_mpeg2_xdcam_codec_tag(AVFormatContext *s, MOVTrack *track)
1490 {
1491  int tag = track->par->codec_tag;
1492  int interlaced = track->par->field_order > AV_FIELD_PROGRESSIVE;
1493  AVStream *st = track->st;
1494  int rate = defined_frame_rate(s, st);
1495 
1496  if (!tag)
1497  tag = MKTAG('m', '2', 'v', '1'); //fallback tag
1498 
1499  if (track->par->format == AV_PIX_FMT_YUV420P) {
1500  if (track->par->width == 1280 && track->par->height == 720) {
1501  if (!interlaced) {
1502  if (rate == 24) tag = MKTAG('x','d','v','4');
1503  else if (rate == 25) tag = MKTAG('x','d','v','5');
1504  else if (rate == 30) tag = MKTAG('x','d','v','1');
1505  else if (rate == 50) tag = MKTAG('x','d','v','a');
1506  else if (rate == 60) tag = MKTAG('x','d','v','9');
1507  }
1508  } else if (track->par->width == 1440 && track->par->height == 1080) {
1509  if (!interlaced) {
1510  if (rate == 24) tag = MKTAG('x','d','v','6');
1511  else if (rate == 25) tag = MKTAG('x','d','v','7');
1512  else if (rate == 30) tag = MKTAG('x','d','v','8');
1513  } else {
1514  if (rate == 25) tag = MKTAG('x','d','v','3');
1515  else if (rate == 30) tag = MKTAG('x','d','v','2');
1516  }
1517  } else if (track->par->width == 1920 && track->par->height == 1080) {
1518  if (!interlaced) {
1519  if (rate == 24) tag = MKTAG('x','d','v','d');
1520  else if (rate == 25) tag = MKTAG('x','d','v','e');
1521  else if (rate == 30) tag = MKTAG('x','d','v','f');
1522  } else {
1523  if (rate == 25) tag = MKTAG('x','d','v','c');
1524  else if (rate == 30) tag = MKTAG('x','d','v','b');
1525  }
1526  }
1527  } else if (track->par->format == AV_PIX_FMT_YUV422P) {
1528  if (track->par->width == 1280 && track->par->height == 720) {
1529  if (!interlaced) {
1530  if (rate == 24) tag = MKTAG('x','d','5','4');
1531  else if (rate == 25) tag = MKTAG('x','d','5','5');
1532  else if (rate == 30) tag = MKTAG('x','d','5','1');
1533  else if (rate == 50) tag = MKTAG('x','d','5','a');
1534  else if (rate == 60) tag = MKTAG('x','d','5','9');
1535  }
1536  } else if (track->par->width == 1920 && track->par->height == 1080) {
1537  if (!interlaced) {
1538  if (rate == 24) tag = MKTAG('x','d','5','d');
1539  else if (rate == 25) tag = MKTAG('x','d','5','e');
1540  else if (rate == 30) tag = MKTAG('x','d','5','f');
1541  } else {
1542  if (rate == 25) tag = MKTAG('x','d','5','c');
1543  else if (rate == 30) tag = MKTAG('x','d','5','b');
1544  }
1545  }
1546  }
1547 
1548  return tag;
1549 }
1550 
1551 static int mov_get_h264_codec_tag(AVFormatContext *s, MOVTrack *track)
1552 {
1553  int tag = track->par->codec_tag;
1554  int interlaced = track->par->field_order > AV_FIELD_PROGRESSIVE;
1555  AVStream *st = track->st;
1556  int rate = defined_frame_rate(s, st);
1557 
1558  if (!tag)
1559  tag = MKTAG('a', 'v', 'c', 'i'); //fallback tag
1560 
1561  if (track->par->format == AV_PIX_FMT_YUV420P10) {
1562  if (track->par->width == 960 && track->par->height == 720) {
1563  if (!interlaced) {
1564  if (rate == 24) tag = MKTAG('a','i','5','p');
1565  else if (rate == 25) tag = MKTAG('a','i','5','q');
1566  else if (rate == 30) tag = MKTAG('a','i','5','p');
1567  else if (rate == 50) tag = MKTAG('a','i','5','q');
1568  else if (rate == 60) tag = MKTAG('a','i','5','p');
1569  }
1570  } else if (track->par->width == 1440 && track->par->height == 1080) {
1571  if (!interlaced) {
1572  if (rate == 24) tag = MKTAG('a','i','5','3');
1573  else if (rate == 25) tag = MKTAG('a','i','5','2');
1574  else if (rate == 30) tag = MKTAG('a','i','5','3');
1575  } else {
1576  if (rate == 50) tag = MKTAG('a','i','5','5');
1577  else if (rate == 60) tag = MKTAG('a','i','5','6');
1578  }
1579  }
1580  } else if (track->par->format == AV_PIX_FMT_YUV422P10) {
1581  if (track->par->width == 1280 && track->par->height == 720) {
1582  if (!interlaced) {
1583  if (rate == 24) tag = MKTAG('a','i','1','p');
1584  else if (rate == 25) tag = MKTAG('a','i','1','q');
1585  else if (rate == 30) tag = MKTAG('a','i','1','p');
1586  else if (rate == 50) tag = MKTAG('a','i','1','q');
1587  else if (rate == 60) tag = MKTAG('a','i','1','p');
1588  }
1589  } else if (track->par->width == 1920 && track->par->height == 1080) {
1590  if (!interlaced) {
1591  if (rate == 24) tag = MKTAG('a','i','1','3');
1592  else if (rate == 25) tag = MKTAG('a','i','1','2');
1593  else if (rate == 30) tag = MKTAG('a','i','1','3');
1594  } else {
1595  if (rate == 25) tag = MKTAG('a','i','1','5');
1596  else if (rate == 50) tag = MKTAG('a','i','1','5');
1597  else if (rate == 60) tag = MKTAG('a','i','1','6');
1598  }
1599  } else if ( track->par->width == 4096 && track->par->height == 2160
1600  || track->par->width == 3840 && track->par->height == 2160
1601  || track->par->width == 2048 && track->par->height == 1080) {
1602  tag = MKTAG('a','i','v','x');
1603  }
1604  }
1605 
1606  return tag;
1607 }
1608 
1609 static const struct {
1610  enum AVPixelFormat pix_fmt;
1611  uint32_t tag;
1612  unsigned bps;
1613 } mov_pix_fmt_tags[] = {
1614  { AV_PIX_FMT_YUYV422, MKTAG('y','u','v','2'), 0 },
1615  { AV_PIX_FMT_YUYV422, MKTAG('y','u','v','s'), 0 },
1616  { AV_PIX_FMT_UYVY422, MKTAG('2','v','u','y'), 0 },
1617  { AV_PIX_FMT_RGB555BE,MKTAG('r','a','w',' '), 16 },
1618  { AV_PIX_FMT_RGB555LE,MKTAG('L','5','5','5'), 16 },
1619  { AV_PIX_FMT_RGB565LE,MKTAG('L','5','6','5'), 16 },
1620  { AV_PIX_FMT_RGB565BE,MKTAG('B','5','6','5'), 16 },
1621  { AV_PIX_FMT_GRAY16BE,MKTAG('b','1','6','g'), 16 },
1622  { AV_PIX_FMT_RGB24, MKTAG('r','a','w',' '), 24 },
1623  { AV_PIX_FMT_BGR24, MKTAG('2','4','B','G'), 24 },
1624  { AV_PIX_FMT_ARGB, MKTAG('r','a','w',' '), 32 },
1625  { AV_PIX_FMT_BGRA, MKTAG('B','G','R','A'), 32 },
1626  { AV_PIX_FMT_RGBA, MKTAG('R','G','B','A'), 32 },
1627  { AV_PIX_FMT_ABGR, MKTAG('A','B','G','R'), 32 },
1628  { AV_PIX_FMT_RGB48BE, MKTAG('b','4','8','r'), 48 },
1629 };
1630 
1631 static int mov_get_dnxhd_codec_tag(AVFormatContext *s, MOVTrack *track)
1632 {
1633  int tag = MKTAG('A','V','d','n');
1634  if (track->par->profile != FF_PROFILE_UNKNOWN &&
1635  track->par->profile != FF_PROFILE_DNXHD)
1636  tag = MKTAG('A','V','d','h');
1637  return tag;
1638 }
1639 
1640 static int mov_get_rawvideo_codec_tag(AVFormatContext *s, MOVTrack *track)
1641 {
1642  int tag = track->par->codec_tag;
1643  int i;
1644  enum AVPixelFormat pix_fmt;
1645 
1646  for (i = 0; i < FF_ARRAY_ELEMS(mov_pix_fmt_tags); i++) {
1647  if (track->par->format == mov_pix_fmt_tags[i].pix_fmt) {
1648  tag = mov_pix_fmt_tags[i].tag;
1649  track->par->bits_per_coded_sample = mov_pix_fmt_tags[i].bps;
1650  if (track->par->codec_tag == mov_pix_fmt_tags[i].tag)
1651  break;
1652  }
1653  }
1654 
1655  pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_mov,
1656  track->par->bits_per_coded_sample);
1657  if (tag == MKTAG('r','a','w',' ') &&
1658  track->par->format != pix_fmt &&
1659  track->par->format != AV_PIX_FMT_GRAY8 &&
1660  track->par->format != AV_PIX_FMT_NONE)
1661  av_log(s, AV_LOG_ERROR, "%s rawvideo cannot be written to mov, output file will be unreadable\n",
1662  av_get_pix_fmt_name(track->par->format));
1663  return tag;
1664 }
1665 
1666 static unsigned int mov_get_codec_tag(AVFormatContext *s, MOVTrack *track)
1667 {
1668  unsigned int tag = track->par->codec_tag;
1669 
1670  // "rtp " is used to distinguish internally created RTP-hint tracks
1671  // (with rtp_ctx) from other tracks.
1672  if (tag == MKTAG('r','t','p',' '))
1673  tag = 0;
1674  if (!tag || (s->strict_std_compliance >= FF_COMPLIANCE_NORMAL &&
1675  (track->par->codec_id == AV_CODEC_ID_DVVIDEO ||
1676  track->par->codec_id == AV_CODEC_ID_RAWVIDEO ||
1677  track->par->codec_id == AV_CODEC_ID_H263 ||
1678  track->par->codec_id == AV_CODEC_ID_H264 ||
1679  track->par->codec_id == AV_CODEC_ID_DNXHD ||
1680  track->par->codec_id == AV_CODEC_ID_MPEG2VIDEO ||
1681  av_get_bits_per_sample(track->par->codec_id)))) { // pcm audio
1682  if (track->par->codec_id == AV_CODEC_ID_DVVIDEO)
1683  tag = mov_get_dv_codec_tag(s, track);
1684  else if (track->par->codec_id == AV_CODEC_ID_RAWVIDEO)
1685  tag = mov_get_rawvideo_codec_tag(s, track);
1686  else if (track->par->codec_id == AV_CODEC_ID_MPEG2VIDEO)
1687  tag = mov_get_mpeg2_xdcam_codec_tag(s, track);
1688  else if (track->par->codec_id == AV_CODEC_ID_H264)
1689  tag = mov_get_h264_codec_tag(s, track);
1690  else if (track->par->codec_id == AV_CODEC_ID_DNXHD)
1691  tag = mov_get_dnxhd_codec_tag(s, track);
1692  else if (track->par->codec_type == AVMEDIA_TYPE_VIDEO) {
1693  tag = ff_codec_get_tag(ff_codec_movvideo_tags, track->par->codec_id);
1694  if (!tag) { // if no mac fcc found, try with Microsoft tags
1695  tag = ff_codec_get_tag(ff_codec_bmp_tags, track->par->codec_id);
1696  if (tag)
1697  av_log(s, AV_LOG_WARNING, "Using MS style video codec tag, "
1698  "the file may be unplayable!\n");
1699  }
1700  } else if (track->par->codec_type == AVMEDIA_TYPE_AUDIO) {
1701  tag = ff_codec_get_tag(ff_codec_movaudio_tags, track->par->codec_id);
1702  if (!tag) { // if no mac fcc found, try with Microsoft tags
1703  int ms_tag = ff_codec_get_tag(ff_codec_wav_tags, track->par->codec_id);
1704  if (ms_tag) {
1705  tag = MKTAG('m', 's', ((ms_tag >> 8) & 0xff), (ms_tag & 0xff));
1706  av_log(s, AV_LOG_WARNING, "Using MS style audio codec tag, "
1707  "the file may be unplayable!\n");
1708  }
1709  }
1710  } else if (track->par->codec_type == AVMEDIA_TYPE_SUBTITLE)
1711  tag = ff_codec_get_tag(ff_codec_movsubtitle_tags, track->par->codec_id);
1712  }
1713 
1714  return tag;
1715 }
1716 
1717 static const AVCodecTag codec_cover_image_tags[] = {
1718  { AV_CODEC_ID_MJPEG, 0xD },
1719  { AV_CODEC_ID_PNG, 0xE },
1720  { AV_CODEC_ID_BMP, 0x1B },
1721  { AV_CODEC_ID_NONE, 0 },
1722 };
1723 
1724 static unsigned int validate_codec_tag(const AVCodecTag *const *tags,
1725  unsigned int tag, int codec_id)
1726 {
1727  int i;
1728 
1729  /**
1730  * Check that tag + id is in the table
1731  */
1732  for (i = 0; tags && tags[i]; i++) {
1733  const AVCodecTag *codec_tags = tags[i];
1734  while (codec_tags->id != AV_CODEC_ID_NONE) {
1735  if (avpriv_toupper4(codec_tags->tag) == avpriv_toupper4(tag) &&
1736  codec_tags->id == codec_id)
1737  return codec_tags->tag;
1738  codec_tags++;
1739  }
1740  }
1741  return 0;
1742 }
1743 
1744 static unsigned int mov_find_codec_tag(AVFormatContext *s, MOVTrack *track)
1745 {
1746  if (is_cover_image(track->st))
1747  return ff_codec_get_tag(codec_cover_image_tags, track->par->codec_id);
1748 
1749  if (track->mode == MODE_IPOD)
1750  if (!av_match_ext(s->url, "m4a") &&
1751  !av_match_ext(s->url, "m4v") &&
1752  !av_match_ext(s->url, "m4b"))
1753  av_log(s, AV_LOG_WARNING, "Warning, extension is not .m4a nor .m4v "
1754  "Quicktime/Ipod might not play the file\n");
1755 
1756  if (track->mode == MODE_MOV) {
1757  return mov_get_codec_tag(s, track);
1758  } else
1759  return validate_codec_tag(s->oformat->codec_tag, track->par->codec_tag,
1760  track->par->codec_id);
1761 }
1762 
1763 /** Write uuid atom.
1764  * Needed to make file play in iPods running newest firmware
1765  * goes after avcC atom in moov.trak.mdia.minf.stbl.stsd.avc1
1766  */
1767 static int mov_write_uuid_tag_ipod(AVIOContext *pb)
1768 {
1769  avio_wb32(pb, 28);
1770  ffio_wfourcc(pb, "uuid");
1771  avio_wb32(pb, 0x6b6840f2);
1772  avio_wb32(pb, 0x5f244fc5);
1773  avio_wb32(pb, 0xba39a51b);
1774  avio_wb32(pb, 0xcf0323f3);
1775  avio_wb32(pb, 0x0);
1776  return 28;
1777 }
1778 
1779 static const uint16_t fiel_data[] = {
1780  0x0000, 0x0100, 0x0201, 0x0206, 0x0209, 0x020e
1781 };
1782 
1783 static int mov_write_fiel_tag(AVIOContext *pb, MOVTrack *track, int field_order)
1784 {
1785  unsigned mov_field_order = 0;
1786  if (field_order < FF_ARRAY_ELEMS(fiel_data))
1787  mov_field_order = fiel_data[field_order];
1788  else
1789  return 0;
1790  avio_wb32(pb, 10);
1791  ffio_wfourcc(pb, "fiel");
1792  avio_wb16(pb, mov_field_order);
1793  return 10;
1794 }
1795 
1796 static int mov_write_subtitle_tag(AVIOContext *pb, MOVTrack *track)
1797 {
1798  int ret = AVERROR_BUG;
1799  int64_t pos = avio_tell(pb);
1800  avio_wb32(pb, 0); /* size */
1801  avio_wl32(pb, track->tag); // store it byteswapped
1802  avio_wb32(pb, 0); /* Reserved */
1803  avio_wb16(pb, 0); /* Reserved */
1804  avio_wb16(pb, 1); /* Data-reference index */
1805 
1806  if (track->par->codec_id == AV_CODEC_ID_DVD_SUBTITLE)
1807  mov_write_esds_tag(pb, track);
1808  else if (track->par->extradata_size)
1809  avio_write(pb, track->par->extradata, track->par->extradata_size);
1810 
1811  if (track->mode == MODE_MP4 &&
1812  ((ret = mov_write_btrt_tag(pb, track)) < 0))
1813  return ret;
1814 
1815  return update_size(pb, pos);
1816 }
1817 
1818 static int mov_write_st3d_tag(AVFormatContext *s, AVIOContext *pb, AVStereo3D *stereo_3d)
1819 {
1820  int8_t stereo_mode;
1821 
1822  if (stereo_3d->flags != 0) {
1823  av_log(s, AV_LOG_WARNING, "Unsupported stereo_3d flags %x. st3d not written.\n", stereo_3d->flags);
1824  return 0;
1825  }
1826 
1827  switch (stereo_3d->type) {
1828  case AV_STEREO3D_2D:
1829  stereo_mode = 0;
1830  break;
1831  case AV_STEREO3D_TOPBOTTOM:
1832  stereo_mode = 1;
1833  break;
1834  case AV_STEREO3D_SIDEBYSIDE:
1835  stereo_mode = 2;
1836  break;
1837  default:
1838  av_log(s, AV_LOG_WARNING, "Unsupported stereo_3d type %s. st3d not written.\n", av_stereo3d_type_name(stereo_3d->type));
1839  return 0;
1840  }
1841  avio_wb32(pb, 13); /* size */
1842  ffio_wfourcc(pb, "st3d");
1843  avio_wb32(pb, 0); /* version = 0 & flags = 0 */
1844  avio_w8(pb, stereo_mode);
1845  return 13;
1846 }
1847 
1848 static int mov_write_sv3d_tag(AVFormatContext *s, AVIOContext *pb, AVSphericalMapping *spherical_mapping)
1849 {
1850  int64_t sv3d_pos, svhd_pos, proj_pos;
1851  const char* metadata_source = s->flags & AVFMT_FLAG_BITEXACT ? "Lavf" : LIBAVFORMAT_IDENT;
1852 
1853  if (spherical_mapping->projection != AV_SPHERICAL_EQUIRECTANGULAR &&
1854  spherical_mapping->projection != AV_SPHERICAL_EQUIRECTANGULAR_TILE &&
1855  spherical_mapping->projection != AV_SPHERICAL_CUBEMAP) {
1856  av_log(s, AV_LOG_WARNING, "Unsupported projection %d. sv3d not written.\n", spherical_mapping->projection);
1857  return 0;
1858  }
1859 
1860  sv3d_pos = avio_tell(pb);
1861  avio_wb32(pb, 0); /* size */
1862  ffio_wfourcc(pb, "sv3d");
1863 
1864  svhd_pos = avio_tell(pb);
1865  avio_wb32(pb, 0); /* size */
1866  ffio_wfourcc(pb, "svhd");
1867  avio_wb32(pb, 0); /* version = 0 & flags = 0 */
1868  avio_put_str(pb, metadata_source);
1869  update_size(pb, svhd_pos);
1870 
1871  proj_pos = avio_tell(pb);
1872  avio_wb32(pb, 0); /* size */
1873  ffio_wfourcc(pb, "proj");
1874 
1875  avio_wb32(pb, 24); /* size */
1876  ffio_wfourcc(pb, "prhd");
1877  avio_wb32(pb, 0); /* version = 0 & flags = 0 */
1878  avio_wb32(pb, spherical_mapping->yaw);
1879  avio_wb32(pb, spherical_mapping->pitch);
1880  avio_wb32(pb, spherical_mapping->roll);
1881 
1882  switch (spherical_mapping->projection) {
1883  case AV_SPHERICAL_EQUIRECTANGULAR:
1884  case AV_SPHERICAL_EQUIRECTANGULAR_TILE:
1885  avio_wb32(pb, 28); /* size */
1886  ffio_wfourcc(pb, "equi");
1887  avio_wb32(pb, 0); /* version = 0 & flags = 0 */
1888  avio_wb32(pb, spherical_mapping->bound_top);
1889  avio_wb32(pb, spherical_mapping->bound_bottom);
1890  avio_wb32(pb, spherical_mapping->bound_left);
1891  avio_wb32(pb, spherical_mapping->bound_right);
1892  break;
1893  case AV_SPHERICAL_CUBEMAP:
1894  avio_wb32(pb, 20); /* size */
1895  ffio_wfourcc(pb, "cbmp");
1896  avio_wb32(pb, 0); /* version = 0 & flags = 0 */
1897  avio_wb32(pb, 0); /* layout */
1898  avio_wb32(pb, spherical_mapping->padding); /* padding */
1899  break;
1900  }
1901  update_size(pb, proj_pos);
1902 
1903  return update_size(pb, sv3d_pos);
1904 }
1905 
1906 static int mov_write_dvcc_dvvc_tag(AVFormatContext *s, AVIOContext *pb, AVDOVIDecoderConfigurationRecord *dovi)
1907 {
1908  avio_wb32(pb, 32); /* size = 8 + 24 */
1909  if (dovi->dv_profile > 7)
1910  ffio_wfourcc(pb, "dvvC");
1911  else
1912  ffio_wfourcc(pb, "dvcC");
1913  avio_w8(pb, dovi->dv_version_major);
1914  avio_w8(pb, dovi->dv_version_minor);
1915  avio_wb16(pb, (dovi->dv_profile << 9) | (dovi->dv_level << 3) |
1916  (dovi->rpu_present_flag << 2) | (dovi->el_present_flag << 1) |
1917  dovi->bl_present_flag);
1918  avio_wb32(pb, (dovi->dv_bl_signal_compatibility_id << 28) | 0);
1919 
1920  avio_wb32(pb, 0); /* reserved */
1921  avio_wb32(pb, 0); /* reserved */
1922  avio_wb32(pb, 0); /* reserved */
1923  avio_wb32(pb, 0); /* reserved */
1924  av_log(s, AV_LOG_DEBUG, "DOVI in %s box, version: %d.%d, profile: %d, level: %d, "
1925  "rpu flag: %d, el flag: %d, bl flag: %d, compatibility id: %d\n",
1926  dovi->dv_profile > 7 ? "dvvC" : "dvcC",
1927  dovi->dv_version_major, dovi->dv_version_minor,
1928  dovi->dv_profile, dovi->dv_level,
1929  dovi->rpu_present_flag,
1930  dovi->el_present_flag,
1931  dovi->bl_present_flag,
1932  dovi->dv_bl_signal_compatibility_id);
1933  return 32; /* 8 + 24 */
1934 }
1935 
1936 static int mov_write_clap_tag(AVIOContext *pb, MOVTrack *track)
1937 {
1938  avio_wb32(pb, 40);
1939  ffio_wfourcc(pb, "clap");
1940  avio_wb32(pb, track->par->width); /* apertureWidth_N */
1941  avio_wb32(pb, 1); /* apertureWidth_D (= 1) */
1942  avio_wb32(pb, track->height); /* apertureHeight_N */
1943  avio_wb32(pb, 1); /* apertureHeight_D (= 1) */
1944  avio_wb32(pb, 0); /* horizOff_N (= 0) */
1945  avio_wb32(pb, 1); /* horizOff_D (= 1) */
1946  avio_wb32(pb, 0); /* vertOff_N (= 0) */
1947  avio_wb32(pb, 1); /* vertOff_D (= 1) */
1948  return 40;
1949 }
1950 
1951 static int mov_write_pasp_tag(AVIOContext *pb, MOVTrack *track)
1952 {
1953  AVRational sar;
1954  av_reduce(&sar.num, &sar.den, track->par->sample_aspect_ratio.num,
1955  track->par->sample_aspect_ratio.den, INT_MAX);
1956 
1957  avio_wb32(pb, 16);
1958  ffio_wfourcc(pb, "pasp");
1959  avio_wb32(pb, sar.num);
1960  avio_wb32(pb, sar.den);
1961  return 16;
1962 }
1963 
1964 static int mov_write_gama_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track, double gamma)
1965 {
1966  uint32_t gama = 0;
1967  if (gamma <= 0.0) {
1968  gamma = avpriv_get_gamma_from_trc(track->par->color_trc);
1969  }
1970  av_log(s, AV_LOG_DEBUG, "gamma value %g\n", gamma);
1971 
1972  if (gamma > 1e-6) {
1973  gama = (uint32_t)lrint((double)(1<<16) * gamma);
1974  av_log(s, AV_LOG_DEBUG, "writing gama value %"PRId32"\n", gama);
1975 
1976  av_assert0(track->mode == MODE_MOV);
1977  avio_wb32(pb, 12);
1978  ffio_wfourcc(pb, "gama");
1979  avio_wb32(pb, gama);
1980  return 12;
1981  } else {
1982  av_log(s, AV_LOG_WARNING, "gamma value unknown, unable to write gama atom\n");
1983  }
1984  return 0;
1985 }
1986 
1987 static int mov_write_colr_tag(AVIOContext *pb, MOVTrack *track, int prefer_icc)
1988 {
1989  int64_t pos = avio_tell(pb);
1990 
1991  // Ref (MOV): https://developer.apple.com/library/mac/technotes/tn2162/_index.html#//apple_ref/doc/uid/DTS40013070-CH1-TNTAG9
1992  // Ref (MP4): ISO/IEC 14496-12:2012
1993 
1994  const uint8_t *icc_profile;
1995  buffer_size_t icc_profile_size;
1996 
1997  if (prefer_icc) {
1998  icc_profile = av_stream_get_side_data(track->st, AV_PKT_DATA_ICC_PROFILE, &icc_profile_size);
1999 
2000  if (icc_profile) {
2001  avio_wb32(pb, 12 + icc_profile_size);
2002  ffio_wfourcc(pb, "colr");
2003  ffio_wfourcc(pb, "prof");
2004  avio_write(pb, icc_profile, icc_profile_size);
2005  return 12 + icc_profile_size;
2006  }
2007  else {
2008  av_log(NULL, AV_LOG_INFO, "no ICC profile found, will write nclx/nclc colour info instead\n");
2009  }
2010  }
2011 
2012  /* We should only ever be called by MOV or MP4. */
2013  av_assert0(track->mode == MODE_MOV || track->mode == MODE_MP4);
2014 
2015  avio_wb32(pb, 0); /* size */
2016  ffio_wfourcc(pb, "colr");
2017  if (track->mode == MODE_MP4)
2018  ffio_wfourcc(pb, "nclx");
2019  else
2020  ffio_wfourcc(pb, "nclc");
2021  // Do not try to guess the color info if it is AVCOL_PRI_UNSPECIFIED.
2022  // e.g., Dolby Vision for Apple devices should be set to AVCOL_PRI_UNSPECIFIED. See
2023  // https://developer.apple.com/av-foundation/High-Dynamic-Range-Metadata-for-Apple-Devices.pdf
2024  avio_wb16(pb, track->par->color_primaries);
2025  avio_wb16(pb, track->par->color_trc);
2026  avio_wb16(pb, track->par->color_space);
2027  if (track->mode == MODE_MP4) {
2028  int full_range = track->par->color_range == AVCOL_RANGE_JPEG;
2029  avio_w8(pb, full_range << 7);
2030  }
2031 
2032  return update_size(pb, pos);
2033 }
2034 
2035 static int mov_write_clli_tag(AVIOContext *pb, MOVTrack *track)
2036 {
2037  const uint8_t *side_data;
2038  const AVContentLightMetadata *content_light_metadata;
2039 
2040  side_data = av_stream_get_side_data(track->st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL, NULL);
2041  if (!side_data) {
2042  return 0;
2043  }
2044  content_light_metadata = (const AVContentLightMetadata*)side_data;
2045 
2046  avio_wb32(pb, 12); // size
2047  ffio_wfourcc(pb, "clli");
2048  avio_wb16(pb, content_light_metadata->MaxCLL);
2049  avio_wb16(pb, content_light_metadata->MaxFALL);
2050  return 12;
2051 }
2052 
2053 static inline int64_t rescale_mdcv(AVRational q, int b)
2054 {
2055  return av_rescale(q.num, b, q.den);
2056 }
2057 
2058 static int mov_write_mdcv_tag(AVIOContext *pb, MOVTrack *track)
2059 {
2060  const int chroma_den = 50000;
2061  const int luma_den = 10000;
2062  const uint8_t *side_data;
2063  const AVMasteringDisplayMetadata *metadata;
2064 
2065  side_data = av_stream_get_side_data(track->st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA, NULL);
2066  metadata = (const AVMasteringDisplayMetadata*)side_data;
2067  if (!metadata || !metadata->has_primaries || !metadata->has_luminance) {
2068  return 0;
2069  }
2070 
2071  avio_wb32(pb, 32); // size
2072  ffio_wfourcc(pb, "mdcv");
2073  avio_wb16(pb, rescale_mdcv(metadata->display_primaries[1][0], chroma_den));
2074  avio_wb16(pb, rescale_mdcv(metadata->display_primaries[1][1], chroma_den));
2075  avio_wb16(pb, rescale_mdcv(metadata->display_primaries[2][0], chroma_den));
2076  avio_wb16(pb, rescale_mdcv(metadata->display_primaries[2][1], chroma_den));
2077  avio_wb16(pb, rescale_mdcv(metadata->display_primaries[0][0], chroma_den));
2078  avio_wb16(pb, rescale_mdcv(metadata->display_primaries[0][1], chroma_den));
2079  avio_wb16(pb, rescale_mdcv(metadata->white_point[0], chroma_den));
2080  avio_wb16(pb, rescale_mdcv(metadata->white_point[1], chroma_den));
2081  avio_wb32(pb, rescale_mdcv(metadata->max_luminance, luma_den));
2082  avio_wb32(pb, rescale_mdcv(metadata->min_luminance, luma_den));
2083  return 32;
2084 }
2085 
2086 static void find_compressor(char * compressor_name, int len, MOVTrack *track)
2087 {
2088  AVDictionaryEntry *encoder;
2089  int xdcam_res = (track->par->width == 1280 && track->par->height == 720)
2090  || (track->par->width == 1440 && track->par->height == 1080)
2091  || (track->par->width == 1920 && track->par->height == 1080);
2092 
2093  if (track->mode == MODE_MOV &&
2094  (encoder = av_dict_get(track->st->metadata, "encoder", NULL, 0))) {
2095  av_strlcpy(compressor_name, encoder->value, 32);
2096  } else if (track->par->codec_id == AV_CODEC_ID_MPEG2VIDEO && xdcam_res) {
2097  int interlaced = track->par->field_order > AV_FIELD_PROGRESSIVE;
2098  AVStream *st = track->st;
2099  int rate = defined_frame_rate(NULL, st);
2100  av_strlcatf(compressor_name, len, "XDCAM");
2101  if (track->par->format == AV_PIX_FMT_YUV422P) {
2102  av_strlcatf(compressor_name, len, " HD422");
2103  } else if(track->par->width == 1440) {
2104  av_strlcatf(compressor_name, len, " HD");
2105  } else
2106  av_strlcatf(compressor_name, len, " EX");
2107 
2108  av_strlcatf(compressor_name, len, " %d%c", track->par->height, interlaced ? 'i' : 'p');
2109 
2110  av_strlcatf(compressor_name, len, "%d", rate * (interlaced + 1));
2111  }
2112 }
2113 
2114 static int mov_write_video_tag(AVFormatContext *s, AVIOContext *pb, MOVMuxContext *mov, MOVTrack *track)
2115 {
2116  int ret = AVERROR_BUG;
2117  int64_t pos = avio_tell(pb);
2118  char compressor_name[32] = { 0 };
2119  int avid = 0;
2120 
2121  int uncompressed_ycbcr = ((track->par->codec_id == AV_CODEC_ID_RAWVIDEO && track->par->format == AV_PIX_FMT_UYVY422)
2122  || (track->par->codec_id == AV_CODEC_ID_RAWVIDEO && track->par->format == AV_PIX_FMT_YUYV422)
2123  || track->par->codec_id == AV_CODEC_ID_V308
2124  || track->par->codec_id == AV_CODEC_ID_V408
2125  || track->par->codec_id == AV_CODEC_ID_V410
2126  || track->par->codec_id == AV_CODEC_ID_V210);
2127 
2128  avio_wb32(pb, 0); /* size */
2129  if (mov->encryption_scheme != MOV_ENC_NONE) {
2130  ffio_wfourcc(pb, "encv");
2131  } else {
2132  avio_wl32(pb, track->tag); // store it byteswapped
2133  }
2134  avio_wb32(pb, 0); /* Reserved */
2135  avio_wb16(pb, 0); /* Reserved */
2136  avio_wb16(pb, 1); /* Data-reference index */
2137 
2138  if (uncompressed_ycbcr) {
2139  avio_wb16(pb, 2); /* Codec stream version */
2140  } else {
2141  avio_wb16(pb, 0); /* Codec stream version */
2142  }
2143  avio_wb16(pb, 0); /* Codec stream revision (=0) */
2144  if (track->mode == MODE_MOV) {
2145  ffio_wfourcc(pb, "FFMP"); /* Vendor */
2146  if (track->par->codec_id == AV_CODEC_ID_RAWVIDEO || uncompressed_ycbcr) {
2147  avio_wb32(pb, 0); /* Temporal Quality */
2148  avio_wb32(pb, 0x400); /* Spatial Quality = lossless*/
2149  } else {
2150  avio_wb32(pb, 0x200); /* Temporal Quality = normal */
2151  avio_wb32(pb, 0x200); /* Spatial Quality = normal */
2152  }
2153  } else {
2154  avio_wb32(pb, 0); /* Reserved */
2155  avio_wb32(pb, 0); /* Reserved */
2156  avio_wb32(pb, 0); /* Reserved */
2157  }
2158  avio_wb16(pb, track->par->width); /* Video width */
2159  avio_wb16(pb, track->height); /* Video height */
2160  avio_wb32(pb, 0x00480000); /* Horizontal resolution 72dpi */
2161  avio_wb32(pb, 0x00480000); /* Vertical resolution 72dpi */
2162  avio_wb32(pb, 0); /* Data size (= 0) */
2163  avio_wb16(pb, 1); /* Frame count (= 1) */
2164 
2165  /* FIXME not sure, ISO 14496-1 draft where it shall be set to 0 */
2166  find_compressor(compressor_name, 32, track);
2167  avio_w8(pb, strlen(compressor_name));
2168  avio_write(pb, compressor_name, 31);
2169 
2170  if (track->mode == MODE_MOV &&
2171  (track->par->codec_id == AV_CODEC_ID_V410 || track->par->codec_id == AV_CODEC_ID_V210))
2172  avio_wb16(pb, 0x18);
2173  else if (track->mode == MODE_MOV && track->par->bits_per_coded_sample)
2174  avio_wb16(pb, track->par->bits_per_coded_sample |
2175  (track->par->format == AV_PIX_FMT_GRAY8 ? 0x20 : 0));
2176  else
2177  avio_wb16(pb, 0x18); /* Reserved */
2178 
2179  if (track->mode == MODE_MOV && track->par->format == AV_PIX_FMT_PAL8) {
2180  int pal_size, i;
2181  avio_wb16(pb, 0); /* Color table ID */
2182  avio_wb32(pb, 0); /* Color table seed */
2183  avio_wb16(pb, 0x8000); /* Color table flags */
2184  if (track->par->bits_per_coded_sample < 0 || track->par->bits_per_coded_sample > 8)
2185  return AVERROR(EINVAL);
2186  pal_size = 1 << track->par->bits_per_coded_sample;
2187  avio_wb16(pb, pal_size - 1); /* Color table size (zero-relative) */
2188  for (i = 0; i < pal_size; i++) {
2189  uint32_t rgb = track->palette[i];
2190  uint16_t r = (rgb >> 16) & 0xff;
2191  uint16_t g = (rgb >> 8) & 0xff;
2192  uint16_t b = rgb & 0xff;
2193  avio_wb16(pb, 0);
2194  avio_wb16(pb, (r << 8) | r);
2195  avio_wb16(pb, (g << 8) | g);
2196  avio_wb16(pb, (b << 8) | b);
2197  }
2198  } else
2199  avio_wb16(pb, 0xffff); /* Reserved */
2200 
2201  if (track->tag == MKTAG('m','p','4','v'))
2202  mov_write_esds_tag(pb, track);
2203  else if (track->par->codec_id == AV_CODEC_ID_H263)
2204  mov_write_d263_tag(pb);
2205  else if (track->par->codec_id == AV_CODEC_ID_AVUI ||
2206  track->par->codec_id == AV_CODEC_ID_SVQ3) {
2207  mov_write_extradata_tag(pb, track);
2208  avio_wb32(pb, 0);
2209  } else if (track->par->codec_id == AV_CODEC_ID_DNXHD) {
2210  mov_write_avid_tag(pb, track);
2211  avid = 1;
2212  } else if (track->par->codec_id == AV_CODEC_ID_HEVC)
2213  mov_write_hvcc_tag(pb, track);
2214  else if (track->par->codec_id == AV_CODEC_ID_H264 && !TAG_IS_AVCI(track->tag)) {
2215  mov_write_avcc_tag(pb, track);
2216  if (track->mode == MODE_IPOD)
2217  mov_write_uuid_tag_ipod(pb);
2218  } else if (track->par->codec_id == AV_CODEC_ID_VP9) {
2219  mov_write_vpcc_tag(mov->fc, pb, track);
2220  } else if (track->par->codec_id == AV_CODEC_ID_AV1) {
2221  mov_write_av1c_tag(pb, track);
2222  } else if (track->par->codec_id == AV_CODEC_ID_VC1 && track->vos_len > 0)
2223  mov_write_dvc1_tag(pb, track);
2224  else if (track->par->codec_id == AV_CODEC_ID_VP6F ||
2225  track->par->codec_id == AV_CODEC_ID_VP6A) {
2226  /* Don't write any potential extradata here - the cropping
2227  * is signalled via the normal width/height fields. */
2228  } else if (track->par->codec_id == AV_CODEC_ID_R10K) {
2229  if (track->par->codec_tag == MKTAG('R','1','0','k'))
2230  mov_write_dpxe_tag(pb, track);
2231  } else if (track->vos_len > 0)
2232  mov_write_glbl_tag(pb, track);
2233 
2234  if (track->par->codec_id != AV_CODEC_ID_H264 &&
2235  track->par->codec_id != AV_CODEC_ID_MPEG4 &&
2236  track->par->codec_id != AV_CODEC_ID_DNXHD) {
2237  int field_order = track->par->field_order;
2238 
2239 #if FF_API_LAVF_AVCTX
2240  FF_DISABLE_DEPRECATION_WARNINGS
2241  if (field_order != track->st->codec->field_order && track->st->codec->field_order != AV_FIELD_UNKNOWN)
2242  field_order = track->st->codec->field_order;
2243  FF_ENABLE_DEPRECATION_WARNINGS
2244 #endif
2245 
2246  if (field_order != AV_FIELD_UNKNOWN)
2247  mov_write_fiel_tag(pb, track, field_order);
2248  }
2249 
2250  if (mov->flags & FF_MOV_FLAG_WRITE_GAMA) {
2251  if (track->mode == MODE_MOV)
2252  mov_write_gama_tag(s, pb, track, mov->gamma);
2253  else
2254  av_log(mov->fc, AV_LOG_WARNING, "Not writing 'gama' atom. Format is not MOV.\n");
2255  }
2256  if (track->mode == MODE_MOV || track->mode == MODE_MP4) {
2257  int has_color_info = track->par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
2258  track->par->color_trc != AVCOL_TRC_UNSPECIFIED &&
2259  track->par->color_space != AVCOL_SPC_UNSPECIFIED;
2260  if (has_color_info || mov->flags & FF_MOV_FLAG_WRITE_COLR ||
2261  av_stream_get_side_data(track->st, AV_PKT_DATA_ICC_PROFILE, NULL)) {
2262  int prefer_icc = mov->flags & FF_MOV_FLAG_PREFER_ICC || !has_color_info;
2263  mov_write_colr_tag(pb, track, prefer_icc);
2264  } else if (mov->flags & FF_MOV_FLAG_WRITE_COLR) {
2265  av_log(mov->fc, AV_LOG_WARNING, "Not writing 'colr' atom. Format is not MOV or MP4.\n");
2266  }
2267  }
2268  if (track->mode == MODE_MOV || track->mode == MODE_MP4) {
2269  mov_write_clli_tag(pb, track);
2270  mov_write_mdcv_tag(pb, track);
2271  }
2272 
2273  if (track->mode == MODE_MP4 && mov->fc->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
2274  AVStereo3D* stereo_3d = (AVStereo3D*) av_stream_get_side_data(track->st, AV_PKT_DATA_STEREO3D, NULL);
2275  AVSphericalMapping* spherical_mapping = (AVSphericalMapping*)av_stream_get_side_data(track->st, AV_PKT_DATA_SPHERICAL, NULL);
2276  AVDOVIDecoderConfigurationRecord *dovi = (AVDOVIDecoderConfigurationRecord *)
2277  av_stream_get_side_data(track->st, AV_PKT_DATA_DOVI_CONF, NULL);
2278 
2279  if (stereo_3d)
2280  mov_write_st3d_tag(s, pb, stereo_3d);
2281  if (spherical_mapping)
2282  mov_write_sv3d_tag(mov->fc, pb, spherical_mapping);
2283  if (dovi)
2284  mov_write_dvcc_dvvc_tag(s, pb, dovi);
2285  }
2286 
2287  if (track->par->sample_aspect_ratio.den && track->par->sample_aspect_ratio.num) {
2288  mov_write_pasp_tag(pb, track);
2289  }
2290 
2291  if (uncompressed_ycbcr){
2292  mov_write_clap_tag(pb, track);
2293  }
2294 
2295  if (mov->encryption_scheme != MOV_ENC_NONE) {
2296  ff_mov_cenc_write_sinf_tag(track, pb, mov->encryption_kid);
2297  }
2298 
2299  if (track->mode == MODE_MP4 &&
2300  ((ret = mov_write_btrt_tag(pb, track)) < 0))
2301  return ret;
2302 
2303  /* extra padding for avid stsd */
2304  /* https://developer.apple.com/library/mac/documentation/QuickTime/QTFF/QTFFChap2/qtff2.html#//apple_ref/doc/uid/TP40000939-CH204-61112 */
2305  if (avid)
2306  avio_wb32(pb, 0);
2307 
2308  return update_size(pb, pos);
2309 }
2310 
2311 static int mov_write_rtp_tag(AVIOContext *pb, MOVTrack *track)
2312 {
2313  int64_t pos = avio_tell(pb);
2314  avio_wb32(pb, 0); /* size */
2315  ffio_wfourcc(pb, "rtp ");
2316  avio_wb32(pb, 0); /* Reserved */
2317  avio_wb16(pb, 0); /* Reserved */
2318  avio_wb16(pb, 1); /* Data-reference index */
2319 
2320  avio_wb16(pb, 1); /* Hint track version */
2321  avio_wb16(pb, 1); /* Highest compatible version */
2322  avio_wb32(pb, track->max_packet_size); /* Max packet size */
2323 
2324  avio_wb32(pb, 12); /* size */
2325  ffio_wfourcc(pb, "tims");
2326  avio_wb32(pb, track->timescale);
2327 
2328  return update_size(pb, pos);
2329 }
2330 
2331 static int mov_write_source_reference_tag(AVIOContext *pb, MOVTrack *track, const char *reel_name)
2332 {
2333  uint64_t str_size =strlen(reel_name);
2334  int64_t pos = avio_tell(pb);
2335 
2336  if (str_size >= UINT16_MAX){
2337  av_log(NULL, AV_LOG_ERROR, "reel_name length %"PRIu64" is too large\n", str_size);
2338  avio_wb16(pb, 0);
2339  return AVERROR(EINVAL);
2340  }
2341 
2342  avio_wb32(pb, 0); /* size */
2343  ffio_wfourcc(pb, "name"); /* Data format */
2344  avio_wb16(pb, str_size); /* string size */
2345  avio_wb16(pb, track->language); /* langcode */
2346  avio_write(pb, reel_name, str_size); /* reel name */
2347  return update_size(pb,pos);
2348 }
2349 
2350 static int mov_write_tmcd_tag(AVIOContext *pb, MOVTrack *track)
2351 {
2352  int64_t pos = avio_tell(pb);
2353 #if 1
2354  int frame_duration;
2355  int nb_frames;
2356  AVDictionaryEntry *t = NULL;
2357 
2358  if (!track->st->avg_frame_rate.num || !track->st->avg_frame_rate.den) {
2359 #if FF_API_LAVF_AVCTX
2360  FF_DISABLE_DEPRECATION_WARNINGS
2361  frame_duration = av_rescale(track->timescale, track->st->codec->time_base.num, track->st->codec->time_base.den);
2362  nb_frames = ROUNDED_DIV(track->st->codec->time_base.den, track->st->codec->time_base.num);
2363  FF_ENABLE_DEPRECATION_WARNINGS
2364 #else
2365  av_log(NULL, AV_LOG_ERROR, "avg_frame_rate not set for tmcd track.\n");
2366  return AVERROR(EINVAL);
2367 #endif
2368  } else {
2369  frame_duration = av_rescale(track->timescale, track->st->avg_frame_rate.num, track->st->avg_frame_rate.den);
2370  nb_frames = ROUNDED_DIV(track->st->avg_frame_rate.den, track->st->avg_frame_rate.num);
2371  }
2372 
2373  if (nb_frames > 255) {
2374  av_log(NULL, AV_LOG_ERROR, "fps %d is too large\n", nb_frames);
2375  return AVERROR(EINVAL);
2376  }
2377 
2378  avio_wb32(pb, 0); /* size */
2379  ffio_wfourcc(pb, "tmcd"); /* Data format */
2380  avio_wb32(pb, 0); /* Reserved */
2381  avio_wb32(pb, 1); /* Data reference index */
2382  avio_wb32(pb, 0); /* Flags */
2383  avio_wb32(pb, track->timecode_flags); /* Flags (timecode) */
2384  avio_wb32(pb, track->timescale); /* Timescale */
2385  avio_wb32(pb, frame_duration); /* Frame duration */
2386  avio_w8(pb, nb_frames); /* Number of frames */
2387  avio_w8(pb, 0); /* Reserved */
2388 
2389  t = av_dict_get(track->st->metadata, "reel_name", NULL, 0);
2390  if (t && utf8len(t->value) && track->mode != MODE_MP4)
2391  mov_write_source_reference_tag(pb, track, t->value);
2392  else
2393  avio_wb16(pb, 0); /* zero size */
2394 #else
2395 
2396  avio_wb32(pb, 0); /* size */
2397  ffio_wfourcc(pb, "tmcd"); /* Data format */
2398  avio_wb32(pb, 0); /* Reserved */
2399  avio_wb32(pb, 1); /* Data reference index */
2400  if (track->par->extradata_size)
2401  avio_write(pb, track->par->extradata, track->par->extradata_size);
2402 #endif
2403  return update_size(pb, pos);
2404 }
2405 
2406 static int mov_write_gpmd_tag(AVIOContext *pb, const MOVTrack *track)
2407 {
2408  int64_t pos = avio_tell(pb);
2409  avio_wb32(pb, 0); /* size */
2410  ffio_wfourcc(pb, "gpmd");
2411  avio_wb32(pb, 0); /* Reserved */
2412  avio_wb16(pb, 0); /* Reserved */
2413  avio_wb16(pb, 1); /* Data-reference index */
2414  avio_wb32(pb, 0); /* Reserved */
2415  return update_size(pb, pos);
2416 }
2417 
2418 static int mov_write_stsd_tag(AVFormatContext *s, AVIOContext *pb, MOVMuxContext *mov, MOVTrack *track)
2419 {
2420  int64_t pos = avio_tell(pb);
2421  int ret = 0;
2422  avio_wb32(pb, 0); /* size */
2423  ffio_wfourcc(pb, "stsd");
2424  avio_wb32(pb, 0); /* version & flags */
2425  avio_wb32(pb, 1); /* entry count */
2426  if (track->par->codec_type == AVMEDIA_TYPE_VIDEO)
2427  ret = mov_write_video_tag(s, pb, mov, track);
2428  else if (track->par->codec_type == AVMEDIA_TYPE_AUDIO)
2429  ret = mov_write_audio_tag(s, pb, mov, track);
2430  else if (track->par->codec_type == AVMEDIA_TYPE_SUBTITLE)
2431  ret = mov_write_subtitle_tag(pb, track);
2432  else if (track->par->codec_tag == MKTAG('r','t','p',' '))
2433  ret = mov_write_rtp_tag(pb, track);
2434  else if (track->par->codec_tag == MKTAG('t','m','c','d'))
2435  ret = mov_write_tmcd_tag(pb, track);
2436  else if (track->par->codec_tag == MKTAG('g','p','m','d'))
2437  ret = mov_write_gpmd_tag(pb, track);
2438 
2439  if (ret < 0)
2440  return ret;
2441 
2442  return update_size(pb, pos);
2443 }
2444 
2445 static int mov_write_ctts_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
2446 {
2447  MOVMuxContext *mov = s->priv_data;
2448  MOVStts *ctts_entries;
2449  uint32_t entries = 0;
2450  uint32_t atom_size;
2451  int i;
2452 
2453  ctts_entries = av_malloc_array((track->entry + 1), sizeof(*ctts_entries)); /* worst case */
2454  if (!ctts_entries)
2455  return AVERROR(ENOMEM);
2456  ctts_entries[0].count = 1;
2457  ctts_entries[0].duration = track->cluster[0].cts;
2458  for (i = 1; i < track->entry; i++) {
2459  if (track->cluster[i].cts == ctts_entries[entries].duration) {
2460  ctts_entries[entries].count++; /* compress */
2461  } else {
2462  entries++;
2463  ctts_entries[entries].duration = track->cluster[i].cts;
2464  ctts_entries[entries].count = 1;
2465  }
2466  }
2467  entries++; /* last one */
2468  atom_size = 16 + (entries * 8);
2469  avio_wb32(pb, atom_size); /* size */
2470  ffio_wfourcc(pb, "ctts");
2471  if (mov->flags & FF_MOV_FLAG_NEGATIVE_CTS_OFFSETS)
2472  avio_w8(pb, 1); /* version */
2473  else
2474  avio_w8(pb, 0); /* version */
2475  avio_wb24(pb, 0); /* flags */
2476  avio_wb32(pb, entries); /* entry count */
2477  for (i = 0; i < entries; i++) {
2478  avio_wb32(pb, ctts_entries[i].count);
2479  avio_wb32(pb, ctts_entries[i].duration);
2480  }
2481  av_free(ctts_entries);
2482  return atom_size;
2483 }
2484 
2485 /* Time to sample atom */
2486 static int mov_write_stts_tag(AVIOContext *pb, MOVTrack *track)
2487 {
2488  MOVStts *stts_entries = NULL;
2489  uint32_t entries = -1;
2490  uint32_t atom_size;
2491  int i;
2492 
2493  if (track->par->codec_type == AVMEDIA_TYPE_AUDIO && !track->audio_vbr) {
2494  stts_entries = av_malloc(sizeof(*stts_entries)); /* one entry */
2495  if (!stts_entries)
2496  return AVERROR(ENOMEM);
2497  stts_entries[0].count = track->sample_count;
2498  stts_entries[0].duration = 1;
2499  entries = 1;
2500  } else {
2501  if (track->entry) {
2502  stts_entries = av_malloc_array(track->entry, sizeof(*stts_entries)); /* worst case */
2503  if (!stts_entries)
2504  return AVERROR(ENOMEM);
2505  }
2506  for (i = 0; i < track->entry; i++) {
2507  int duration = get_cluster_duration(track, i);
2508  if (i && duration == stts_entries[entries].duration) {
2509  stts_entries[entries].count++; /* compress */
2510  } else {
2511  entries++;
2512  stts_entries[entries].duration = duration;
2513  stts_entries[entries].count = 1;
2514  }
2515  }
2516  entries++; /* last one */
2517  }
2518  atom_size = 16 + (entries * 8);
2519  avio_wb32(pb, atom_size); /* size */
2520  ffio_wfourcc(pb, "stts");
2521  avio_wb32(pb, 0); /* version & flags */
2522  avio_wb32(pb, entries); /* entry count */
2523  for (i = 0; i < entries; i++) {
2524  avio_wb32(pb, stts_entries[i].count);
2525  avio_wb32(pb, stts_entries[i].duration);
2526  }
2527  av_free(stts_entries);
2528  return atom_size;
2529 }
2530 
2531 static int mov_write_dref_tag(AVIOContext *pb)
2532 {
2533  avio_wb32(pb, 28); /* size */
2534  ffio_wfourcc(pb, "dref");
2535  avio_wb32(pb, 0); /* version & flags */
2536  avio_wb32(pb, 1); /* entry count */
2537 
2538  avio_wb32(pb, 0xc); /* size */
2539  //FIXME add the alis and rsrc atom
2540  ffio_wfourcc(pb, "url ");
2541  avio_wb32(pb, 1); /* version & flags */
2542 
2543  return 28;
2544 }
2545 
2546 static int mov_preroll_write_stbl_atoms(AVIOContext *pb, MOVTrack *track)
2547 {
2548  struct sgpd_entry {
2549  int count;
2550  int16_t roll_distance;
2551  int group_description_index;
2552  };
2553 
2554  struct sgpd_entry *sgpd_entries = NULL;
2555  int entries = -1;
2556  int group = 0;
2557  int i, j;
2558 
2559  const int OPUS_SEEK_PREROLL_MS = 80;
2560  int roll_samples = av_rescale_q(OPUS_SEEK_PREROLL_MS,
2561  (AVRational){1, 1000},
2562  (AVRational){1, 48000});
2563 
2564  if (!track->entry)
2565  return 0;
2566 
2567  sgpd_entries = av_malloc_array(track->entry, sizeof(*sgpd_entries));
2568  if (!sgpd_entries)
2569  return AVERROR(ENOMEM);
2570 
2571  av_assert0(track->par->codec_id == AV_CODEC_ID_OPUS || track->par->codec_id == AV_CODEC_ID_AAC);
2572 
2573  if (track->par->codec_id == AV_CODEC_ID_OPUS) {
2574  for (i = 0; i < track->entry; i++) {
2575  int roll_samples_remaining = roll_samples;
2576  int distance = 0;
2577  for (j = i - 1; j >= 0; j--) {
2578  roll_samples_remaining -= get_cluster_duration(track, j);
2579  distance++;
2580  if (roll_samples_remaining <= 0)
2581  break;
2582  }
2583  /* We don't have enough preceeding samples to compute a valid
2584  roll_distance here, so this sample can't be independently
2585  decoded. */
2586  if (roll_samples_remaining > 0)
2587  distance = 0;
2588  /* Verify distance is a maximum of 32 (2.5ms) packets. */
2589  if (distance > 32)
2590  return AVERROR_INVALIDDATA;
2591  if (i && distance == sgpd_entries[entries].roll_distance) {
2592  sgpd_entries[entries].count++;
2593  } else {
2594  entries++;
2595  sgpd_entries[entries].count = 1;
2596  sgpd_entries[entries].roll_distance = distance;
2597  sgpd_entries[entries].group_description_index = distance ? ++group : 0;
2598  }
2599  }
2600  } else {
2601  entries++;
2602  sgpd_entries[entries].count = track->sample_count;
2603  sgpd_entries[entries].roll_distance = 1;
2604  sgpd_entries[entries].group_description_index = ++group;
2605  }
2606  entries++;
2607 
2608  if (!group) {
2609  av_free(sgpd_entries);
2610  return 0;
2611  }
2612 
2613  /* Write sgpd tag */
2614  avio_wb32(pb, 24 + (group * 2)); /* size */
2615  ffio_wfourcc(pb, "sgpd");
2616  avio_wb32(pb, 1 << 24); /* fullbox */
2617  ffio_wfourcc(pb, "roll");
2618  avio_wb32(pb, 2); /* default_length */
2619  avio_wb32(pb, group); /* entry_count */
2620  for (i = 0; i < entries; i++) {
2621  if (sgpd_entries[i].group_description_index) {
2622  avio_wb16(pb, -sgpd_entries[i].roll_distance); /* roll_distance */
2623  }
2624  }
2625 
2626  /* Write sbgp tag */
2627  avio_wb32(pb, 20 + (entries * 8)); /* size */
2628  ffio_wfourcc(pb, "sbgp");
2629  avio_wb32(pb, 0); /* fullbox */
2630  ffio_wfourcc(pb, "roll");
2631  avio_wb32(pb, entries); /* entry_count */
2632  for (i = 0; i < entries; i++) {
2633  avio_wb32(pb, sgpd_entries[i].count); /* sample_count */
2634  avio_wb32(pb, sgpd_entries[i].group_description_index); /* group_description_index */
2635  }
2636 
2637  av_free(sgpd_entries);
2638  return 0;
2639 }
2640 
2641 static int mov_write_stbl_tag(AVFormatContext *s, AVIOContext *pb, MOVMuxContext *mov, MOVTrack *track)
2642 {
2643  int64_t pos = avio_tell(pb);
2644  int ret = 0;
2645 
2646  avio_wb32(pb, 0); /* size */
2647  ffio_wfourcc(pb, "stbl");
2648  if ((ret = mov_write_stsd_tag(s, pb, mov, track)) < 0)
2649  return ret;
2650  mov_write_stts_tag(pb, track);
2651  if ((track->par->codec_type == AVMEDIA_TYPE_VIDEO ||
2652  track->par->codec_id == AV_CODEC_ID_TRUEHD ||
2653  track->par->codec_id == AV_CODEC_ID_MPEGH_3D_AUDIO ||
2654  track->par->codec_tag == MKTAG('r','t','p',' ')) &&
2655  track->has_keyframes && track->has_keyframes < track->entry)
2656  mov_write_stss_tag(pb, track, MOV_SYNC_SAMPLE);
2657  if (track->par->codec_type == AVMEDIA_TYPE_VIDEO && track->has_disposable)
2658  mov_write_sdtp_tag(pb, track);
2659  if (track->mode == MODE_MOV && track->flags & MOV_TRACK_STPS)
2660  mov_write_stss_tag(pb, track, MOV_PARTIAL_SYNC_SAMPLE);
2661  if (track->par->codec_type == AVMEDIA_TYPE_VIDEO &&
2662  track->flags & MOV_TRACK_CTTS && track->entry) {
2663 
2664  if ((ret = mov_write_ctts_tag(s, pb, track)) < 0)
2665  return ret;
2666  }
2667  mov_write_stsc_tag(pb, track);
2668  mov_write_stsz_tag(pb, track);
2669  mov_write_stco_tag(pb, track);
2670  if (track->cenc.aes_ctr) {
2671  ff_mov_cenc_write_stbl_atoms(&track->cenc, pb);
2672  }
2673  if (track->par->codec_id == AV_CODEC_ID_OPUS || track->par->codec_id == AV_CODEC_ID_AAC) {
2674  mov_preroll_write_stbl_atoms(pb, track);
2675  }
2676  return update_size(pb, pos);
2677 }
2678 
2679 static int mov_write_dinf_tag(AVIOContext *pb)
2680 {
2681  int64_t pos = avio_tell(pb);
2682  avio_wb32(pb, 0); /* size */
2683  ffio_wfourcc(pb, "dinf");
2684  mov_write_dref_tag(pb);
2685  return update_size(pb, pos);
2686 }
2687 
2688 static int mov_write_nmhd_tag(AVIOContext *pb)
2689 {
2690  avio_wb32(pb, 12);
2691  ffio_wfourcc(pb, "nmhd");
2692  avio_wb32(pb, 0);
2693  return 12;
2694 }
2695 
2696 static int mov_write_tcmi_tag(AVIOContext *pb, MOVTrack *track)
2697 {
2698  int64_t pos = avio_tell(pb);
2699  const char *font = "Lucida Grande";
2700  avio_wb32(pb, 0); /* size */
2701  ffio_wfourcc(pb, "tcmi"); /* timecode media information atom */
2702  avio_wb32(pb, 0); /* version & flags */
2703  avio_wb16(pb, 0); /* text font */
2704  avio_wb16(pb, 0); /* text face */
2705  avio_wb16(pb, 12); /* text size */
2706  avio_wb16(pb, 0); /* (unknown, not in the QT specs...) */
2707  avio_wb16(pb, 0x0000); /* text color (red) */
2708  avio_wb16(pb, 0x0000); /* text color (green) */
2709  avio_wb16(pb, 0x0000); /* text color (blue) */
2710  avio_wb16(pb, 0xffff); /* background color (red) */
2711  avio_wb16(pb, 0xffff); /* background color (green) */
2712  avio_wb16(pb, 0xffff); /* background color (blue) */
2713  avio_w8(pb, strlen(font)); /* font len (part of the pascal string) */
2714  avio_write(pb, font, strlen(font)); /* font name */
2715  return update_size(pb, pos);
2716 }
2717 
2718 static int mov_write_gmhd_tag(AVIOContext *pb, MOVTrack *track)
2719 {
2720  int64_t pos = avio_tell(pb);
2721  avio_wb32(pb, 0); /* size */
2722  ffio_wfourcc(pb, "gmhd");
2723  avio_wb32(pb, 0x18); /* gmin size */
2724  ffio_wfourcc(pb, "gmin");/* generic media info */
2725  avio_wb32(pb, 0); /* version & flags */
2726  avio_wb16(pb, 0x40); /* graphics mode = */
2727  avio_wb16(pb, 0x8000); /* opColor (r?) */
2728  avio_wb16(pb, 0x8000); /* opColor (g?) */
2729  avio_wb16(pb, 0x8000); /* opColor (b?) */
2730  avio_wb16(pb, 0); /* balance */
2731  avio_wb16(pb, 0); /* reserved */
2732 
2733  /*
2734  * This special text atom is required for
2735  * Apple Quicktime chapters. The contents
2736  * don't appear to be documented, so the
2737  * bytes are copied verbatim.
2738  */
2739  if (track->tag != MKTAG('c','6','0','8')) {
2740  avio_wb32(pb, 0x2C); /* size */
2741  ffio_wfourcc(pb, "text");
2742  avio_wb16(pb, 0x01);
2743  avio_wb32(pb, 0x00);
2744  avio_wb32(pb, 0x00);
2745  avio_wb32(pb, 0x00);
2746  avio_wb32(pb, 0x01);
2747  avio_wb32(pb, 0x00);
2748  avio_wb32(pb, 0x00);
2749  avio_wb32(pb, 0x00);
2750  avio_wb32(pb, 0x00004000);
2751  avio_wb16(pb, 0x0000);
2752  }
2753 
2754  if (track->par->codec_tag == MKTAG('t','m','c','d')) {
2755  int64_t tmcd_pos = avio_tell(pb);
2756  avio_wb32(pb, 0); /* size */
2757  ffio_wfourcc(pb, "tmcd");
2758  mov_write_tcmi_tag(pb, track);
2759  update_size(pb, tmcd_pos);
2760  } else if (track->par->codec_tag == MKTAG('g','p','m','d')) {
2761  int64_t gpmd_pos = avio_tell(pb);
2762  avio_wb32(pb, 0); /* size */
2763  ffio_wfourcc(pb, "gpmd");
2764  avio_wb32(pb, 0); /* version */
2765  update_size(pb, gpmd_pos);
2766  }
2767  return update_size(pb, pos);
2768 }
2769 
2770 static int mov_write_smhd_tag(AVIOContext *pb)
2771 {
2772  avio_wb32(pb, 16); /* size */
2773  ffio_wfourcc(pb, "smhd");
2774  avio_wb32(pb, 0); /* version & flags */
2775  avio_wb16(pb, 0); /* reserved (balance, normally = 0) */
2776  avio_wb16(pb, 0); /* reserved */
2777  return 16;
2778 }
2779 
2780 static int mov_write_vmhd_tag(AVIOContext *pb)
2781 {
2782  avio_wb32(pb, 0x14); /* size (always 0x14) */
2783  ffio_wfourcc(pb, "vmhd");
2784  avio_wb32(pb, 0x01); /* version & flags */
2785  avio_wb64(pb, 0); /* reserved (graphics mode = copy) */
2786  return 0x14;
2787 }
2788 
2789 static int is_clcp_track(MOVTrack *track)
2790 {
2791  return track->tag == MKTAG('c','7','0','8') ||
2792  track->tag == MKTAG('c','6','0','8');
2793 }
2794 
2795 static int mov_write_hdlr_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
2796 {
2797  MOVMuxContext *mov = s->priv_data;
2798  const char *hdlr, *descr = NULL, *hdlr_type = NULL;
2799  int64_t pos = avio_tell(pb);
2800 
2801  hdlr = "dhlr";
2802  hdlr_type = "url ";
2803  descr = "DataHandler";
2804 
2805  if (track) {
2806  hdlr = (track->mode == MODE_MOV) ? "mhlr" : "\0\0\0\0";
2807  if (track->par->codec_type == AVMEDIA_TYPE_VIDEO) {
2808  hdlr_type = "vide";
2809  descr = "VideoHandler";
2810  } else if (track->par->codec_type == AVMEDIA_TYPE_AUDIO) {
2811  hdlr_type = "soun";
2812  descr = "SoundHandler";
2813  } else if (track->par->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2814  if (is_clcp_track(track)) {
2815  hdlr_type = "clcp";
2816  descr = "ClosedCaptionHandler";
2817  } else {
2818  if (track->tag == MKTAG('t','x','3','g')) {
2819  hdlr_type = "sbtl";
2820  } else if (track->tag == MKTAG('m','p','4','s')) {
2821  hdlr_type = "subp";
2822  } else {
2823  hdlr_type = "text";
2824  }
2825  descr = "SubtitleHandler";
2826  }
2827  } else if (track->par->codec_tag == MKTAG('r','t','p',' ')) {
2828  hdlr_type = "hint";
2829  descr = "HintHandler";
2830  } else if (track->par->codec_tag == MKTAG('t','m','c','d')) {
2831  hdlr_type = "tmcd";
2832  descr = "TimeCodeHandler";
2833  } else if (track->par->codec_tag == MKTAG('g','p','m','d')) {
2834  hdlr_type = "meta";
2835  descr = "GoPro MET"; // GoPro Metadata
2836  } else {
2837  av_log(s, AV_LOG_WARNING,
2838  "Unknown hldr_type for %s, writing dummy values\n",
2839  av_fourcc2str(track->par->codec_tag));
2840  }
2841  if (track->st) {
2842  // hdlr.name is used by some players to identify the content title
2843  // of the track. So if an alternate handler description is
2844  // specified, use it.
2845  AVDictionaryEntry *t;
2846  t = av_dict_get(track->st->metadata, "handler_name", NULL, 0);
2847  if (t && utf8len(t->value))
2848  descr = t->value;
2849  }
2850  }
2851 
2852  if (mov->empty_hdlr_name) /* expressly allowed by QTFF and not prohibited in ISO 14496-12 8.4.3.3 */
2853  descr = "";
2854 
2855  avio_wb32(pb, 0); /* size */
2856  ffio_wfourcc(pb, "hdlr");
2857  avio_wb32(pb, 0); /* Version & flags */
2858  avio_write(pb, hdlr, 4); /* handler */
2859  ffio_wfourcc(pb, hdlr_type); /* handler type */
2860  avio_wb32(pb, 0); /* reserved */
2861  avio_wb32(pb, 0); /* reserved */
2862  avio_wb32(pb, 0); /* reserved */
2863  if (!track || track->mode == MODE_MOV)
2864  avio_w8(pb, strlen(descr)); /* pascal string */
2865  avio_write(pb, descr, strlen(descr)); /* handler description */
2866  if (track && track->mode != MODE_MOV)
2867  avio_w8(pb, 0); /* c string */
2868  return update_size(pb, pos);
2869 }
2870 
2871 static int mov_write_hmhd_tag(AVIOContext *pb)
2872 {
2873  /* This atom must be present, but leaving the values at zero
2874  * seems harmless. */
2875  avio_wb32(pb, 28); /* size */
2876  ffio_wfourcc(pb, "hmhd");
2877  avio_wb32(pb, 0); /* version, flags */
2878  avio_wb16(pb, 0); /* maxPDUsize */
2879  avio_wb16(pb, 0); /* avgPDUsize */
2880  avio_wb32(pb, 0); /* maxbitrate */
2881  avio_wb32(pb, 0); /* avgbitrate */
2882  avio_wb32(pb, 0); /* reserved */
2883  return 28;
2884 }
2885 
2886 static int mov_write_minf_tag(AVFormatContext *s, AVIOContext *pb, MOVMuxContext *mov, MOVTrack *track)
2887 {
2888  int64_t pos = avio_tell(pb);
2889  int ret;
2890 
2891  avio_wb32(pb, 0); /* size */
2892  ffio_wfourcc(pb, "minf");
2893  if (track->par->codec_type == AVMEDIA_TYPE_VIDEO)
2894  mov_write_vmhd_tag(pb);
2895  else if (track->par->codec_type == AVMEDIA_TYPE_AUDIO)
2896  mov_write_smhd_tag(pb);
2897  else if (track->par->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2898  if (track->tag == MKTAG('t','e','x','t') || is_clcp_track(track)) {
2899  mov_write_gmhd_tag(pb, track);
2900  } else {
2901  mov_write_nmhd_tag(pb);
2902  }
2903  } else if (track->tag == MKTAG('r','t','p',' ')) {
2904  mov_write_hmhd_tag(pb);
2905  } else if (track->tag == MKTAG('t','m','c','d')) {
2906  if (track->mode != MODE_MOV)
2907  mov_write_nmhd_tag(pb);
2908  else
2909  mov_write_gmhd_tag(pb, track);
2910  } else if (track->tag == MKTAG('g','p','m','d')) {
2911  mov_write_gmhd_tag(pb, track);
2912  }
2913  if (track->mode == MODE_MOV) /* ISO 14496-12 8.4.3.1 specifies hdlr only within mdia or meta boxes */
2914  mov_write_hdlr_tag(s, pb, NULL);
2915  mov_write_dinf_tag(pb);
2916  if ((ret = mov_write_stbl_tag(s, pb, mov, track)) < 0)
2917  return ret;
2918  return update_size(pb, pos);
2919 }
2920 
2921 static void get_pts_range(MOVMuxContext *mov, MOVTrack *track,
2922  int64_t *start, int64_t *end)
2923 {
2924  if (track->tag == MKTAG('t','m','c','d') && mov->nb_meta_tmcd) {
2925  // tmcd tracks gets track_duration set in mov_write_moov_tag from
2926  // another track's duration, while the end_pts may be left at zero.
2927  // Calculate the pts duration for that track instead.
2928  get_pts_range(mov, &mov->tracks[track->src_track], start, end);
2929  *start = av_rescale(*start, track->timescale,
2930  mov->tracks[track->src_track].timescale);
2931  *end = av_rescale(*end, track->timescale,
2932  mov->tracks[track->src_track].timescale);
2933  return;
2934  }
2935  if (track->end_pts != AV_NOPTS_VALUE &&
2936  track->start_dts != AV_NOPTS_VALUE &&
2937  track->start_cts != AV_NOPTS_VALUE) {
2938  *start = track->start_dts + track->start_cts;
2939  *end = track->end_pts;
2940  return;
2941  }
2942  *start = 0;
2943  *end = track->track_duration;
2944 }
2945 
2946 static int64_t calc_samples_pts_duration(MOVMuxContext *mov, MOVTrack *track)
2947 {
2948  int64_t start, end;
2949  get_pts_range(mov, track, &start, &end);
2950  return end - start;
2951 }
2952 
2953 // Calculate the actual duration of the track, after edits.
2954 // If it starts with a pts < 0, that is removed by the edit list.
2955 // If it starts with a pts > 0, the edit list adds a delay before that.
2956 // Thus, with edit lists enabled, the post-edit output of the file is
2957 // starting with pts=0.
2958 static int64_t calc_pts_duration(MOVMuxContext *mov, MOVTrack *track)
2959 {
2960  int64_t start, end;
2961  get_pts_range(mov, track, &start, &end);
2962  if (mov->use_editlist != 0)
2963  start = 0;
2964  return end - start;
2965 }
2966 
2967 static int mov_write_mdhd_tag(AVIOContext *pb, MOVMuxContext *mov,
2968  MOVTrack *track)
2969 {
2970  int64_t duration = calc_pts_duration(mov, track);
2971  int version = duration < INT32_MAX ? 0 : 1;
2972 
2973  if (track->mode == MODE_ISM)
2974  version = 1;
2975 
2976  (version == 1) ? avio_wb32(pb, 44) : avio_wb32(pb, 32); /* size */
2977  ffio_wfourcc(pb, "mdhd");
2978  avio_w8(pb, version);
2979  avio_wb24(pb, 0); /* flags */
2980  if (version == 1) {
2981  avio_wb64(pb, track->time);
2982  avio_wb64(pb, track->time);
2983  } else {
2984  avio_wb32(pb, track->time); /* creation time */
2985  avio_wb32(pb, track->time); /* modification time */
2986  }
2987  avio_wb32(pb, track->timescale); /* time scale (sample rate for audio) */
2988  if (!track->entry && mov->mode == MODE_ISM)
2989  (version == 1) ? avio_wb64(pb, UINT64_C(0xffffffffffffffff)) : avio_wb32(pb, 0xffffffff);
2990  else if (!track->entry)
2991  (version == 1) ? avio_wb64(pb, 0) : avio_wb32(pb, 0);
2992  else
2993  (version == 1) ? avio_wb64(pb, duration) : avio_wb32(pb, duration); /* duration */
2994  avio_wb16(pb, track->language); /* language */
2995  avio_wb16(pb, 0); /* reserved (quality) */
2996 
2997  if (version != 0 && track->mode == MODE_MOV) {
2998  av_log(NULL, AV_LOG_ERROR,
2999  "FATAL error, file duration too long for timebase, this file will not be\n"
3000  "playable with QuickTime. Choose a different timebase with "
3001  "-video_track_timescale or a different container format\n");
3002  }
3003 
3004  return 32;
3005 }
3006 
3007 static int mov_write_mdia_tag(AVFormatContext *s, AVIOContext *pb,
3008  MOVMuxContext *mov, MOVTrack *track)
3009 {
3010  int64_t pos = avio_tell(pb);
3011  int ret;
3012 
3013  avio_wb32(pb, 0); /* size */
3014  ffio_wfourcc(pb, "mdia");
3015  mov_write_mdhd_tag(pb, mov, track);
3016  mov_write_hdlr_tag(s, pb, track);
3017  if ((ret = mov_write_minf_tag(s, pb, mov, track)) < 0)
3018  return ret;
3019  return update_size(pb, pos);
3020 }
3021 
3022 /* transformation matrix
3023  |a b u|
3024  |c d v|
3025  |tx ty w| */
3026 static void write_matrix(AVIOContext *pb, int16_t a, int16_t b, int16_t c,
3027  int16_t d, int16_t tx, int16_t ty)
3028 {
3029  avio_wb32(pb, a << 16); /* 16.16 format */
3030  avio_wb32(pb, b << 16); /* 16.16 format */
3031  avio_wb32(pb, 0); /* u in 2.30 format */
3032  avio_wb32(pb, c << 16); /* 16.16 format */
3033  avio_wb32(pb, d << 16); /* 16.16 format */
3034  avio_wb32(pb, 0); /* v in 2.30 format */
3035  avio_wb32(pb, tx << 16); /* 16.16 format */
3036  avio_wb32(pb, ty << 16); /* 16.16 format */
3037  avio_wb32(pb, 1 << 30); /* w in 2.30 format */
3038 }
3039 
3040 static int mov_write_tkhd_tag(AVIOContext *pb, MOVMuxContext *mov,
3041  MOVTrack *track, AVStream *st)
3042 {
3043  int64_t duration = av_rescale_rnd(calc_pts_duration(mov, track),
3044  MOV_TIMESCALE, track->timescale,
3045  AV_ROUND_UP);
3046  int version = duration < INT32_MAX ? 0 : 1;
3047  int flags = MOV_TKHD_FLAG_IN_MOVIE;
3048  int rotation = 0;
3049  int group = 0;
3050 
3051  uint32_t *display_matrix = NULL;
3052  buffer_size_t display_matrix_size;
3053  int i;
3054 
3055  if (st) {
3056  if (mov->per_stream_grouping)
3057  group = st->index;
3058  else
3059  group = st->codecpar->codec_type;
3060 
3061  display_matrix = (uint32_t*)av_stream_get_side_data(st, AV_PKT_DATA_DISPLAYMATRIX,
3062  &display_matrix_size);
3063  if (display_matrix && display_matrix_size < 9 * sizeof(*display_matrix))
3064  display_matrix = NULL;
3065  }
3066 
3067  if (track->flags & MOV_TRACK_ENABLED)
3068  flags |= MOV_TKHD_FLAG_ENABLED;
3069 
3070  if (track->mode == MODE_ISM)
3071  version = 1;
3072 
3073  (version == 1) ? avio_wb32(pb, 104) : avio_wb32(pb, 92); /* size */
3074  ffio_wfourcc(pb, "tkhd");
3075  avio_w8(pb, version);
3076  avio_wb24(pb, flags);
3077  if (version == 1) {
3078  avio_wb64(pb, track->time);
3079  avio_wb64(pb, track->time);
3080  } else {
3081  avio_wb32(pb, track->time); /* creation time */
3082  avio_wb32(pb, track->time); /* modification time */
3083  }
3084  avio_wb32(pb, track->track_id); /* track-id */
3085  avio_wb32(pb, 0); /* reserved */
3086  if (!track->entry && mov->mode == MODE_ISM)
3087  (version == 1) ? avio_wb64(pb, UINT64_C(0xffffffffffffffff)) : avio_wb32(pb, 0xffffffff);
3088  else if (!track->entry)
3089  (version == 1) ? avio_wb64(pb, 0) : avio_wb32(pb, 0);
3090  else
3091  (version == 1) ? avio_wb64(pb, duration) : avio_wb32(pb, duration);
3092 
3093  avio_wb32(pb, 0); /* reserved */
3094  avio_wb32(pb, 0); /* reserved */
3095  avio_wb16(pb, 0); /* layer */
3096  avio_wb16(pb, group); /* alternate group) */
3097  /* Volume, only for audio */
3098  if (track->par->codec_type == AVMEDIA_TYPE_AUDIO)
3099  avio_wb16(pb, 0x0100);
3100  else
3101  avio_wb16(pb, 0);
3102  avio_wb16(pb, 0); /* reserved */
3103 
3104  /* Matrix structure */
3105 #if FF_API_OLD_ROTATE_API
3106  if (st && st->metadata) {
3107  AVDictionaryEntry *rot = av_dict_get(st->metadata, "rotate", NULL, 0);
3108  rotation = (rot && rot->value) ? atoi(rot->value) : 0;
3109  }
3110 #endif
3111  if (display_matrix) {
3112  for (i = 0; i < 9; i++)
3113  avio_wb32(pb, display_matrix[i]);
3114 #if FF_API_OLD_ROTATE_API
3115  } else if (rotation == 90) {
3116  write_matrix(pb, 0, 1, -1, 0, track->par->height, 0);
3117  } else if (rotation == 180) {
3118  write_matrix(pb, -1, 0, 0, -1, track->par->width, track->par->height);
3119  } else if (rotation == 270) {
3120  write_matrix(pb, 0, -1, 1, 0, 0, track->par->width);
3121 #endif
3122  } else {
3123  write_matrix(pb, 1, 0, 0, 1, 0, 0);
3124  }
3125  /* Track width and height, for visual only */
3126  if (st && (track->par->codec_type == AVMEDIA_TYPE_VIDEO ||
3127  track->par->codec_type == AVMEDIA_TYPE_SUBTITLE)) {
3128  int64_t track_width_1616;
3129  if (track->mode == MODE_MOV) {
3130  track_width_1616 = track->par->width * 0x10000ULL;
3131  } else {
3132  track_width_1616 = av_rescale(st->sample_aspect_ratio.num,
3133  track->par->width * 0x10000LL,
3134  st->sample_aspect_ratio.den);
3135  if (!track_width_1616 ||
3136  track->height != track->par->height ||
3137  track_width_1616 > UINT32_MAX)
3138  track_width_1616 = track->par->width * 0x10000ULL;
3139  }
3140  if (track_width_1616 > UINT32_MAX) {
3141  av_log(mov->fc, AV_LOG_WARNING, "track width is too large\n");
3142  track_width_1616 = 0;
3143  }
3144  avio_wb32(pb, track_width_1616);
3145  if (track->height > 0xFFFF) {
3146  av_log(mov->fc, AV_LOG_WARNING, "track height is too large\n");
3147  avio_wb32(pb, 0);
3148  } else
3149  avio_wb32(pb, track->height * 0x10000U);
3150  } else {
3151  avio_wb32(pb, 0);
3152  avio_wb32(pb, 0);
3153  }
3154  return 0x5c;
3155 }
3156 
3157 static int mov_write_tapt_tag(AVIOContext *pb, MOVTrack *track)
3158 {
3159  int32_t width = av_rescale(track->par->sample_aspect_ratio.num, track->par->width,
3160  track->par->sample_aspect_ratio.den);
3161 
3162  int64_t pos = avio_tell(pb);
3163 
3164  avio_wb32(pb, 0); /* size */
3165  ffio_wfourcc(pb, "tapt");
3166 
3167  avio_wb32(pb, 20);
3168  ffio_wfourcc(pb, "clef");
3169  avio_wb32(pb, 0);
3170  avio_wb32(pb, width << 16);
3171  avio_wb32(pb, track->par->height << 16);
3172 
3173  avio_wb32(pb, 20);
3174  ffio_wfourcc(pb, "prof");
3175  avio_wb32(pb, 0);
3176  avio_wb32(pb, width << 16);
3177  avio_wb32(pb, track->par->height << 16);
3178 
3179  avio_wb32(pb, 20);
3180  ffio_wfourcc(pb, "enof");
3181  avio_wb32(pb, 0);
3182  avio_wb32(pb, track->par->width << 16);
3183  avio_wb32(pb, track->par->height << 16);
3184 
3185  return update_size(pb, pos);
3186 }
3187 
3188 // This box seems important for the psp playback ... without it the movie seems to hang
3189 static int mov_write_edts_tag(AVIOContext *pb, MOVMuxContext *mov,
3190  MOVTrack *track)
3191 {
3192  int64_t duration = av_rescale_rnd(calc_samples_pts_duration(mov, track),
3193  MOV_TIMESCALE, track->timescale,
3194  AV_ROUND_UP);
3195  int version = duration < INT32_MAX ? 0 : 1;
3196  int entry_size, entry_count, size;
3197  int64_t delay, start_ct = track->start_cts;
3198  int64_t start_dts = track->start_dts;
3199 
3200  if (track->entry) {
3201  if (start_dts != track->cluster[0].dts || start_ct != track->cluster[0].cts) {
3202 
3203  av_log(mov->fc, AV_LOG_DEBUG,
3204  "EDTS using dts:%"PRId64" cts:%d instead of dts:%"PRId64" cts:%"PRId64" tid:%d\n",
3205  track->cluster[0].dts, track->cluster[0].cts,
3206  start_dts, start_ct, track->track_id);
3207  start_dts = track->cluster[0].dts;
3208  start_ct = track->cluster[0].cts;
3209  }
3210  }
3211 
3212  delay = av_rescale_rnd(start_dts + start_ct, MOV_TIMESCALE,
3213  track->timescale, AV_ROUND_DOWN);
3214  version |= delay < INT32_MAX ? 0 : 1;
3215 
3216  entry_size = (version == 1) ? 20 : 12;
3217  entry_count = 1 + (delay > 0);
3218  size = 24 + entry_count * entry_size;
3219 
3220  /* write the atom data */
3221  avio_wb32(pb, size);
3222  ffio_wfourcc(pb, "edts");
3223  avio_wb32(pb, size - 8);
3224  ffio_wfourcc(pb, "elst");
3225  avio_w8(pb, version);
3226  avio_wb24(pb, 0); /* flags */
3227 
3228  avio_wb32(pb, entry_count);
3229  if (delay > 0) { /* add an empty edit to delay presentation */
3230  /* In the positive delay case, the delay includes the cts
3231  * offset, and the second edit list entry below trims out
3232  * the same amount from the actual content. This makes sure
3233  * that the offset last sample is included in the edit
3234  * list duration as well. */
3235  if (version == 1) {
3236  avio_wb64(pb, delay);
3237  avio_wb64(pb, -1);
3238  } else {
3239  avio_wb32(pb, delay);
3240  avio_wb32(pb, -1);
3241  }
3242  avio_wb32(pb, 0x00010000);
3243  } else {
3244  /* Avoid accidentally ending up with start_ct = -1 which has got a
3245  * special meaning. Normally start_ct should end up positive or zero
3246  * here, but use FFMIN in case dts is a small positive integer
3247  * rounded to 0 when represented in MOV_TIMESCALE units. */
3248  av_assert0(av_rescale_rnd(start_dts, MOV_TIMESCALE, track->timescale, AV_ROUND_DOWN) <= 0);
3249  start_ct = -FFMIN(start_dts, 0);
3250  /* Note, this delay is calculated from the pts of the first sample,
3251  * ensuring that we don't reduce the duration for cases with
3252  * dts<0 pts=0. */
3253  duration += delay;
3254  }
3255 
3256  /* For fragmented files, we don't know the full length yet. Setting
3257  * duration to 0 allows us to only specify the offset, including
3258  * the rest of the content (from all future fragments) without specifying
3259  * an explicit duration. */
3260  if (mov->flags & FF_MOV_FLAG_FRAGMENT)
3261  duration = 0;
3262 
3263  /* duration */
3264  if (version == 1) {
3265  avio_wb64(pb, duration);
3266  avio_wb64(pb, start_ct);
3267  } else {
3268  avio_wb32(pb, duration);
3269  avio_wb32(pb, start_ct);
3270  }
3271  avio_wb32(pb, 0x00010000);
3272  return size;
3273 }
3274 
3275 static int mov_write_tref_tag(AVIOContext *pb, MOVTrack *track)
3276 {
3277  avio_wb32(pb, 20); // size
3278  ffio_wfourcc(pb, "tref");
3279  avio_wb32(pb, 12); // size (subatom)
3280  avio_wl32(pb, track->tref_tag);
3281  avio_wb32(pb, track->tref_id);
3282  return 20;
3283 }
3284 
3285 // goes at the end of each track! ... Critical for PSP playback ("Incompatible data" without it)
3286 static int mov_write_uuid_tag_psp(AVIOContext *pb, MOVTrack *mov)
3287 {
3288  avio_wb32(pb, 0x34); /* size ... reports as 28 in mp4box! */
3289  ffio_wfourcc(pb, "uuid");
3290  ffio_wfourcc(pb, "USMT");
3291  avio_wb32(pb, 0x21d24fce);
3292  avio_wb32(pb, 0xbb88695c);
3293  avio_wb32(pb, 0xfac9c740);
3294  avio_wb32(pb, 0x1c); // another size here!
3295  ffio_wfourcc(pb, "MTDT");
3296  avio_wb32(pb, 0x00010012);
3297  avio_wb32(pb, 0x0a);
3298  avio_wb32(pb, 0x55c40000);
3299  avio_wb32(pb, 0x1);
3300  avio_wb32(pb, 0x0);
3301  return 0x34;
3302 }
3303 
3304 static int mov_write_udta_sdp(AVIOContext *pb, MOVTrack *track)
3305 {
3306  AVFormatContext *ctx = track->rtp_ctx;
3307  char buf[1000] = "";
3308  int len;
3309 
3310  ff_sdp_write_media(buf, sizeof(buf), ctx->streams[0], track->src_track,
3311  NULL, NULL, 0, 0, ctx);
3312  av_strlcatf(buf, sizeof(buf), "a=control:streamid=%d\r\n", track->track_id);
3313  len = strlen(buf);
3314 
3315  avio_wb32(pb, len + 24);
3316  ffio_wfourcc(pb, "udta");
3317  avio_wb32(pb, len + 16);
3318  ffio_wfourcc(pb, "hnti");
3319  avio_wb32(pb, len + 8);
3320  ffio_wfourcc(pb, "sdp ");
3321  avio_write(pb, buf, len);
3322  return len + 24;
3323 }
3324 
3325 static int mov_write_track_metadata(AVIOContext *pb, AVStream *st,
3326  const char *tag, const char *str)
3327 {
3328  int64_t pos = avio_tell(pb);
3329  AVDictionaryEntry *t = av_dict_get(st->metadata, str, NULL, 0);
3330  if (!t || !utf8len(t->value))
3331  return 0;
3332 
3333  avio_wb32(pb, 0); /* size */
3334  ffio_wfourcc(pb, tag); /* type */
3335  avio_write(pb, t->value, strlen(t->value)); /* UTF8 string value */
3336  return update_size(pb, pos);
3337 }
3338 
3339 static int mov_write_track_udta_tag(AVIOContext *pb, MOVMuxContext *mov,
3340  AVStream *st)
3341 {
3342  AVIOContext *pb_buf;
3343  int ret, size;
3344  uint8_t *buf;
3345 
3346  if (!st)
3347  return 0;
3348 
3349  ret = avio_open_dyn_buf(&pb_buf);
3350  if (ret < 0)
3351  return ret;
3352 
3353  if (mov->mode & (MODE_MP4|MODE_MOV))
3354  mov_write_track_metadata(pb_buf, st, "name", "title");
3355 
3356  if ((size = avio_get_dyn_buf(pb_buf, &buf)) > 0) {
3357  avio_wb32(pb, size + 8);
3358  ffio_wfourcc(pb, "udta");
3359  avio_write(pb, buf, size);
3360  }
3361  ffio_free_dyn_buf(&pb_buf);
3362 
3363  return 0;
3364 }
3365 
3366 static int mov_write_trak_tag(AVFormatContext *s, AVIOContext *pb, MOVMuxContext *mov,
3367  MOVTrack *track, AVStream *st)
3368 {
3369  int64_t pos = avio_tell(pb);
3370  int entry_backup = track->entry;
3371  int chunk_backup = track->chunkCount;
3372  int ret;
3373 
3374  /* If we want to have an empty moov, but some samples already have been
3375  * buffered (delay_moov), pretend that no samples have been written yet. */
3376  if (mov->flags & FF_MOV_FLAG_EMPTY_MOOV)
3377  track->chunkCount = track->entry = 0;
3378 
3379  avio_wb32(pb, 0); /* size */
3380  ffio_wfourcc(pb, "trak");
3381  mov_write_tkhd_tag(pb, mov, track, st);
3382 
3383  av_assert2(mov->use_editlist >= 0);
3384 
3385  if (track->start_dts != AV_NOPTS_VALUE) {
3386  if (mov->use_editlist)
3387  mov_write_edts_tag(pb, mov, track); // PSP Movies and several other cases require edts box
3388  else if ((track->entry && track->cluster[0].dts) || track->mode == MODE_PSP || is_clcp_track(track))
3389  av_log(mov->fc, AV_LOG_WARNING,
3390  "Not writing any edit list even though one would have been required\n");
3391  }
3392 
3393  if (track->tref_tag)
3394  mov_write_tref_tag(pb, track);
3395 
3396  if ((ret = mov_write_mdia_tag(s, pb, mov, track)) < 0)
3397  return ret;
3398  if (track->mode == MODE_PSP)
3399  mov_write_uuid_tag_psp(pb, track); // PSP Movies require this uuid box
3400  if (track->tag == MKTAG('r','t','p',' '))
3401  mov_write_udta_sdp(pb, track);
3402  if (track->mode == MODE_MOV) {
3403  if (track->par->codec_type == AVMEDIA_TYPE_VIDEO) {
3404  double sample_aspect_ratio = av_q2d(st->sample_aspect_ratio);
3405  if (st->sample_aspect_ratio.num && 1.0 != sample_aspect_ratio) {
3406  mov_write_tapt_tag(pb, track);
3407  }
3408  }
3409  if (is_clcp_track(track) && st->sample_aspect_ratio.num) {
3410  mov_write_tapt_tag(pb, track);
3411  }
3412  }
3413  mov_write_track_udta_tag(pb, mov, st);
3414  track->entry = entry_backup;
3415  track->chunkCount = chunk_backup;
3416  return update_size(pb, pos);
3417 }
3418 
3419 static int mov_write_iods_tag(AVIOContext *pb, MOVMuxContext *mov)
3420 {
3421  int i, has_audio = 0, has_video = 0;
3422  int64_t pos = avio_tell(pb);
3423  int audio_profile = mov->iods_audio_profile;
3424  int video_profile = mov->iods_video_profile;
3425  for (i = 0; i < mov->nb_streams; i++) {
3426  if (mov->tracks[i].entry > 0 || mov->flags & FF_MOV_FLAG_EMPTY_MOOV) {
3427  has_audio |= mov->tracks[i].par->codec_type == AVMEDIA_TYPE_AUDIO;
3428  has_video |= mov->tracks[i].par->codec_type == AVMEDIA_TYPE_VIDEO;
3429  }
3430  }
3431  if (audio_profile < 0)
3432  audio_profile = 0xFF - has_audio;
3433  if (video_profile < 0)
3434  video_profile = 0xFF - has_video;
3435  avio_wb32(pb, 0x0); /* size */
3436  ffio_wfourcc(pb, "iods");
3437  avio_wb32(pb, 0); /* version & flags */
3438  put_descr(pb, 0x10, 7);
3439  avio_wb16(pb, 0x004f);
3440  avio_w8(pb, 0xff);
3441  avio_w8(pb, 0xff);
3442  avio_w8(pb, audio_profile);
3443  avio_w8(pb, video_profile);
3444  avio_w8(pb, 0xff);
3445  return update_size(pb, pos);
3446 }
3447 
3448 static int mov_write_trex_tag(AVIOContext *pb, MOVTrack *track)
3449 {
3450  avio_wb32(pb, 0x20); /* size */
3451  ffio_wfourcc(pb, "trex");
3452  avio_wb32(pb, 0); /* version & flags */
3453  avio_wb32(pb, track->track_id); /* track ID */
3454  avio_wb32(pb, 1); /* default sample description index */
3455  avio_wb32(pb, 0); /* default sample duration */
3456  avio_wb32(pb, 0); /* default sample size */
3457  avio_wb32(pb, 0); /* default sample flags */
3458  return 0;
3459 }
3460 
3461 static int mov_write_mvex_tag(AVIOContext *pb, MOVMuxContext *mov)
3462 {
3463  int64_t pos = avio_tell(pb);
3464  int i;
3465  avio_wb32(pb, 0x0); /* size */
3466  ffio_wfourcc(pb, "mvex");
3467  for (i = 0; i < mov->nb_streams; i++)
3468  mov_write_trex_tag(pb, &mov->tracks[i]);
3469  return update_size(pb, pos);
3470 }
3471 
3472 static int mov_write_mvhd_tag(AVIOContext *pb, MOVMuxContext *mov)
3473 {
3474  int max_track_id = 1, i;
3475  int64_t max_track_len = 0;
3476  int version;
3477 
3478  for (i = 0; i < mov->nb_streams; i++) {
3479  if (mov->tracks[i].entry > 0 && mov->tracks[i].timescale) {
3480  int64_t max_track_len_temp = av_rescale_rnd(
3481  calc_pts_duration(mov, &mov->tracks[i]),
3482  MOV_TIMESCALE,
3483  mov->tracks[i].timescale,
3484  AV_ROUND_UP);
3485  if (max_track_len < max_track_len_temp)
3486  max_track_len = max_track_len_temp;
3487  if (max_track_id < mov->tracks[i].track_id)
3488  max_track_id = mov->tracks[i].track_id;
3489  }
3490  }
3491  /* If using delay_moov, make sure the output is the same as if no
3492  * samples had been written yet. */
3493  if (mov->flags & FF_MOV_FLAG_EMPTY_MOOV) {
3494  max_track_len = 0;
3495  max_track_id = 1;
3496  }
3497 
3498  version = max_track_len < UINT32_MAX ? 0 : 1;
3499  avio_wb32(pb, version == 1 ? 120 : 108); /* size */
3500 
3501  ffio_wfourcc(pb, "mvhd");
3502  avio_w8(pb, version);
3503  avio_wb24(pb, 0); /* flags */
3504  if (version == 1) {
3505  avio_wb64(pb, mov->time);
3506  avio_wb64(pb, mov->time);
3507  } else {
3508  avio_wb32(pb, mov->time); /* creation time */
3509  avio_wb32(pb, mov->time); /* modification time */
3510  }
3511  avio_wb32(pb, MOV_TIMESCALE);
3512  (version == 1) ? avio_wb64(pb, max_track_len) : avio_wb32(pb, max_track_len); /* duration of longest track */
3513 
3514  avio_wb32(pb, 0x00010000); /* reserved (preferred rate) 1.0 = normal */
3515  avio_wb16(pb, 0x0100); /* reserved (preferred volume) 1.0 = normal */
3516  avio_wb16(pb, 0); /* reserved */
3517  avio_wb32(pb, 0); /* reserved */
3518  avio_wb32(pb, 0); /* reserved */
3519 
3520  /* Matrix structure */
3521  write_matrix(pb, 1, 0, 0, 1, 0, 0);
3522 
3523  avio_wb32(pb, 0); /* reserved (preview time) */
3524  avio_wb32(pb, 0); /* reserved (preview duration) */
3525  avio_wb32(pb, 0); /* reserved (poster time) */
3526  avio_wb32(pb, 0); /* reserved (selection time) */
3527  avio_wb32(pb, 0); /* reserved (selection duration) */
3528  avio_wb32(pb, 0); /* reserved (current time) */
3529  avio_wb32(pb, max_track_id + 1); /* Next track id */
3530  return 0x6c;
3531 }
3532 
3533 static int mov_write_itunes_hdlr_tag(AVIOContext *pb, MOVMuxContext *mov,
3534  AVFormatContext *s)
3535 {
3536  avio_wb32(pb, 33); /* size */
3537  ffio_wfourcc(pb, "hdlr");
3538  avio_wb32(pb, 0);
3539  avio_wb32(pb, 0);
3540  ffio_wfourcc(pb, "mdir");
3541  ffio_wfourcc(pb, "appl");
3542  avio_wb32(pb, 0);
3543  avio_wb32(pb, 0);
3544  avio_w8(pb, 0);
3545  return 33;
3546 }
3547 
3548 /* helper function to write a data tag with the specified string as data */
3549 static int mov_write_string_data_tag(AVIOContext *pb, const char *data, int lang, int long_style)
3550 {
3551  if (long_style) {
3552  int size = 16 + strlen(data);
3553  avio_wb32(pb, size); /* size */
3554  ffio_wfourcc(pb, "data");
3555  avio_wb32(pb, 1);
3556  avio_wb32(pb, 0);
3557  avio_write(pb, data, strlen(data));
3558  return size;
3559  } else {
3560  if (!lang)
3561  lang = ff_mov_iso639_to_lang("und", 1);
3562  avio_wb16(pb, strlen(data)); /* string length */
3563  avio_wb16(pb, lang);
3564  avio_write(pb, data, strlen(data));
3565  return strlen(data) + 4;
3566  }
3567 }
3568 
3569 static int mov_write_string_tag(AVIOContext *pb, const char *name,
3570  const char *value, int lang, int long_style)
3571 {
3572  int size = 0;
3573  if (value && value[0]) {
3574  int64_t pos = avio_tell(pb);
3575  avio_wb32(pb, 0); /* size */
3576  ffio_wfourcc(pb, name);
3577  mov_write_string_data_tag(pb, value, lang, long_style);
3578  size = update_size(pb, pos);
3579  }
3580  return size;
3581 }
3582 
3583 static AVDictionaryEntry *get_metadata_lang(AVFormatContext *s,
3584  const char *tag, int *lang)
3585 {
3586  int l, len, len2;
3587  AVDictionaryEntry *t, *t2 = NULL;
3588  char tag2[16];
3589 
3590  *lang = 0;
3591 
3592  if (!(t = av_dict_get(s->metadata, tag, NULL, 0)))
3593  return NULL;
3594 
3595  len = strlen(t->key);
3596  snprintf(tag2, sizeof(tag2), "%s-", tag);
3597  while ((t2 = av_dict_get(s->metadata, tag2, t2, AV_DICT_IGNORE_SUFFIX))) {
3598  len2 = strlen(t2->key);
3599  if (len2 == len + 4 && !strcmp(t->value, t2->value)
3600  && (l = ff_mov_iso639_to_lang(&t2->key[len2 - 3], 1)) >= 0) {
3601  *lang = l;
3602  return t;
3603  }
3604  }
3605  return t;
3606 }
3607 
3608 static int mov_write_string_metadata(AVFormatContext *s, AVIOContext *pb,
3609  const char *name, const char *tag,
3610  int long_style)
3611 {
3612  int lang;
3613  AVDictionaryEntry *t = get_metadata_lang(s, tag, &lang);
3614  if (!t)
3615  return 0;
3616  return mov_write_string_tag(pb, name, t->value, lang, long_style);
3617 }
3618 
3619 /* iTunes bpm number */
3620 static int mov_write_tmpo_tag(AVIOContext *pb, AVFormatContext *s)
3621 {
3622  AVDictionaryEntry *t = av_dict_get(s->metadata, "tmpo", NULL, 0);
3623  int size = 0, tmpo = t ? atoi(t->value) : 0;
3624  if (tmpo) {
3625  size = 26;
3626  avio_wb32(pb, size);
3627  ffio_wfourcc(pb, "tmpo");
3628  avio_wb32(pb, size-8); /* size */
3629  ffio_wfourcc(pb, "data");
3630  avio_wb32(pb, 0x15); //type specifier
3631  avio_wb32(pb, 0);
3632  avio_wb16(pb, tmpo); // data
3633  }
3634  return size;
3635 }
3636 
3637 /* 3GPP TS 26.244 */
3638 static int mov_write_loci_tag(AVFormatContext *s, AVIOContext *pb)
3639 {
3640  int lang;
3641  int64_t pos = avio_tell(pb);
3642  double latitude, longitude, altitude;
3643  int32_t latitude_fix, longitude_fix, altitude_fix;
3644  AVDictionaryEntry *t = get_metadata_lang(s, "location", &lang);
3645  const char *ptr, *place = "";
3646  char *end;
3647  static const char *astronomical_body = "earth";
3648  if (!t)
3649  return 0;
3650 
3651  ptr = t->value;
3652  longitude = strtod(ptr, &end);
3653  if (end == ptr) {
3654  av_log(s, AV_LOG_WARNING, "malformed location metadata\n");
3655  return 0;
3656  }
3657  ptr = end;
3658  latitude = strtod(ptr, &end);
3659  if (end == ptr) {
3660  av_log(s, AV_LOG_WARNING, "malformed location metadata\n");
3661  return 0;
3662  }
3663  ptr = end;
3664  altitude = strtod(ptr, &end);
3665  /* If no altitude was present, the default 0 should be fine */
3666  if (*end == '/')
3667  place = end + 1;
3668 
3669  latitude_fix = (int32_t) ((1 << 16) * latitude);
3670  longitude_fix = (int32_t) ((1 << 16) * longitude);
3671  altitude_fix = (int32_t) ((1 << 16) * altitude);
3672 
3673  avio_wb32(pb, 0); /* size */
3674  ffio_wfourcc(pb, "loci"); /* type */
3675  avio_wb32(pb, 0); /* version + flags */
3676  avio_wb16(pb, lang);
3677  avio_write(pb, place, strlen(place) + 1);
3678  avio_w8(pb, 0); /* role of place (0 == shooting location, 1 == real location, 2 == fictional location) */
3679  avio_wb32(pb, latitude_fix);
3680  avio_wb32(pb, longitude_fix);
3681  avio_wb32(pb, altitude_fix);
3682  avio_write(pb, astronomical_body, strlen(astronomical_body) + 1);
3683  avio_w8(pb, 0); /* additional notes, null terminated string */
3684 
3685  return update_size(pb, pos);
3686 }
3687 
3688 /* iTunes track or disc number */
3689 static int mov_write_trkn_tag(AVIOContext *pb, MOVMuxContext *mov,
3690  AVFormatContext *s, int disc)
3691 {
3692  AVDictionaryEntry *t = av_dict_get(s->metadata,
3693  disc ? "disc" : "track",
3694  NULL, 0);
3695  int size = 0, track = t ? atoi(t->value) : 0;
3696  if (track) {
3697  int tracks = 0;
3698  char *slash = strchr(t->value, '/');
3699  if (slash)
3700  tracks = atoi(slash + 1);
3701  avio_wb32(pb, 32); /* size */
3702  ffio_wfourcc(pb, disc ? "disk" : "trkn");
3703  avio_wb32(pb, 24); /* size */
3704  ffio_wfourcc(pb, "data");
3705  avio_wb32(pb, 0); // 8 bytes empty
3706  avio_wb32(pb, 0);
3707  avio_wb16(pb, 0); // empty
3708  avio_wb16(pb, track); // track / disc number
3709  avio_wb16(pb, tracks); // total track / disc number
3710  avio_wb16(pb, 0); // empty
3711  size = 32;
3712  }
3713  return size;
3714 }
3715 
3716 static int mov_write_int8_metadata(AVFormatContext *s, AVIOContext *pb,
3717  const char *name, const char *tag,
3718  int len)
3719 {
3720  AVDictionaryEntry *t = NULL;
3721  uint8_t num;
3722  int size = 24 + len;
3723 
3724  if (len != 1 && len != 4)
3725  return -1;
3726 
3727  if (!(t = av_dict_get(s->metadata, tag, NULL, 0)))
3728  return 0;
3729  num = atoi(t->value);
3730 
3731  avio_wb32(pb, size);
3732  ffio_wfourcc(pb, name);
3733  avio_wb32(pb, size - 8);
3734  ffio_wfourcc(pb, "data");
3735  avio_wb32(pb, 0x15);
3736  avio_wb32(pb, 0);
3737  if (len==4) avio_wb32(pb, num);
3738  else avio_w8 (pb, num);
3739 
3740  return size;
3741 }
3742 
3743 static int mov_write_covr(AVIOContext *pb, AVFormatContext *s)
3744 {
3745  MOVMuxContext *mov = s->priv_data;
3746  int64_t pos = 0;
3747  int i;
3748 
3749  for (i = 0; i < s->nb_streams; i++) {
3750  MOVTrack *trk = &mov->tracks[i];
3751 
3752  if (!is_cover_image(trk->st) || trk->cover_image->size <= 0)
3753  continue;
3754 
3755  if (!pos) {
3756  pos = avio_tell(pb);
3757  avio_wb32(pb, 0);
3758  ffio_wfourcc(pb, "covr");
3759  }
3760  avio_wb32(pb, 16 + trk->cover_image->size);
3761  ffio_wfourcc(pb, "data");
3762  avio_wb32(pb, trk->tag);
3763  avio_wb32(pb , 0);
3764  avio_write(pb, trk->cover_image->data, trk->cover_image->size);
3765  }
3766 
3767  return pos ? update_size(pb, pos) : 0;
3768 }
3769 
3770 /* iTunes meta data list */
3771 static int mov_write_ilst_tag(AVIOContext *pb, MOVMuxContext *mov,
3772  AVFormatContext *s)
3773 {
3774  int64_t pos = avio_tell(pb);
3775  avio_wb32(pb, 0); /* size */
3776  ffio_wfourcc(pb, "ilst");
3777  mov_write_string_metadata(s, pb, "\251nam", "title" , 1);
3778  mov_write_string_metadata(s, pb, "\251ART", "artist" , 1);
3779  mov_write_string_metadata(s, pb, "aART", "album_artist", 1);
3780  mov_write_string_metadata(s, pb, "\251wrt", "composer" , 1);
3781  mov_write_string_metadata(s, pb, "\251alb", "album" , 1);
3782  mov_write_string_metadata(s, pb, "\251day", "date" , 1);
3783  if (!mov_write_string_metadata(s, pb, "\251too", "encoding_tool", 1)) {
3784  if (!(s->flags & AVFMT_FLAG_BITEXACT))
3785  mov_write_string_tag(pb, "\251too", LIBAVFORMAT_IDENT, 0, 1);
3786  }
3787  mov_write_string_metadata(s, pb, "\251cmt", "comment" , 1);
3788  mov_write_string_metadata(s, pb, "\251gen", "genre" , 1);
3789  mov_write_string_metadata(s, pb, "cprt", "copyright", 1);
3790  mov_write_string_metadata(s, pb, "\251grp", "grouping" , 1);
3791  mov_write_string_metadata(s, pb, "\251lyr", "lyrics" , 1);
3792  mov_write_string_metadata(s, pb, "desc", "description",1);
3793  mov_write_string_metadata(s, pb, "ldes", "synopsis" , 1);
3794  mov_write_string_metadata(s, pb, "tvsh", "show" , 1);
3795  mov_write_string_metadata(s, pb, "tven", "episode_id",1);
3796  mov_write_string_metadata(s, pb, "tvnn", "network" , 1);
3797  mov_write_string_metadata(s, pb, "keyw", "keywords" , 1);
3798  mov_write_int8_metadata (s, pb, "tves", "episode_sort",4);
3799  mov_write_int8_metadata (s, pb, "tvsn", "season_number",4);
3800  mov_write_int8_metadata (s, pb, "stik", "media_type",1);
3801  mov_write_int8_metadata (s, pb, "hdvd", "hd_video", 1);
3802  mov_write_int8_metadata (s, pb, "pgap", "gapless_playback",1);
3803  mov_write_int8_metadata (s, pb, "cpil", "compilation", 1);
3804  mov_write_covr(pb, s);
3805  mov_write_trkn_tag(pb, mov, s, 0); // track number
3806  mov_write_trkn_tag(pb, mov, s, 1); // disc number
3807  mov_write_tmpo_tag(pb, s);
3808  return update_size(pb, pos);
3809 }
3810 
3811 static int mov_write_mdta_hdlr_tag(AVIOContext *pb, MOVMuxContext *mov,
3812  AVFormatContext *s)
3813 {
3814  avio_wb32(pb, 33); /* size */
3815  ffio_wfourcc(pb, "hdlr");
3816  avio_wb32(pb, 0);
3817  avio_wb32(pb, 0);
3818  ffio_wfourcc(pb, "mdta");
3819  avio_wb32(pb, 0);
3820  avio_wb32(pb, 0);
3821  avio_wb32(pb, 0);
3822  avio_w8(pb, 0);
3823  return 33;
3824 }
3825 
3826 static int mov_write_mdta_keys_tag(AVIOContext *pb, MOVMuxContext *mov,
3827  AVFormatContext *s)
3828 {
3829  AVDictionaryEntry *t = NULL;
3830  int64_t pos = avio_tell(pb);
3831  int64_t curpos, entry_pos;
3832  int count = 0;
3833 
3834  avio_wb32(pb, 0); /* size */
3835  ffio_wfourcc(pb, "keys");
3836  avio_wb32(pb, 0);
3837  entry_pos = avio_tell(pb);
3838  avio_wb32(pb, 0); /* entry count */
3839 
3840  while (t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX)) {
3841  avio_wb32(pb, strlen(t->key) + 8);
3842  ffio_wfourcc(pb, "mdta");
3843  avio_write(pb, t->key, strlen(t->key));
3844  count += 1;
3845  }
3846  curpos = avio_tell(pb);
3847  avio_seek(pb, entry_pos, SEEK_SET);
3848  avio_wb32(pb, count); // rewrite entry count
3849  avio_seek(pb, curpos, SEEK_SET);
3850 
3851  return update_size(pb, pos);
3852 }
3853 
3854 static int mov_write_mdta_ilst_tag(AVIOContext *pb, MOVMuxContext *mov,
3855  AVFormatContext *s)
3856 {
3857  AVDictionaryEntry *t = NULL;
3858  int64_t pos = avio_tell(pb);
3859  int count = 1; /* keys are 1-index based */
3860 
3861  avio_wb32(pb, 0); /* size */
3862  ffio_wfourcc(pb, "ilst");
3863 
3864  while (t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX)) {
3865  int64_t entry_pos = avio_tell(pb);
3866  avio_wb32(pb, 0); /* size */
3867  avio_wb32(pb, count); /* key */
3868  mov_write_string_data_tag(pb, t->value, 0, 1);
3869  update_size(pb, entry_pos);
3870  count += 1;
3871  }
3872  return update_size(pb, pos);
3873 }
3874 
3875 /* meta data tags */
3876 static int mov_write_meta_tag(AVIOContext *pb, MOVMuxContext *mov,
3877  AVFormatContext *s)
3878 {
3879  int size = 0;
3880  int64_t pos = avio_tell(pb);
3881  avio_wb32(pb, 0); /* size */
3882  ffio_wfourcc(pb, "meta");
3883  avio_wb32(pb, 0);
3884  if (mov->flags & FF_MOV_FLAG_USE_MDTA) {
3885  mov_write_mdta_hdlr_tag(pb, mov, s);
3886  mov_write_mdta_keys_tag(pb, mov, s);
3887  mov_write_mdta_ilst_tag(pb, mov, s);
3888  }
3889  else {
3890  /* iTunes metadata tag */
3891  mov_write_itunes_hdlr_tag(pb, mov, s);
3892  mov_write_ilst_tag(pb, mov, s);
3893  }
3894  size = update_size(pb, pos);
3895  return size;
3896 }
3897 
3898 static int mov_write_raw_metadata_tag(AVFormatContext *s, AVIOContext *pb,
3899  const char *name, const char *key)
3900 {
3901  int len;
3902  AVDictionaryEntry *t;
3903 
3904  if (!(t = av_dict_get(s->metadata, key, NULL, 0)))
3905  return 0;
3906 
3907  len = strlen(t->value);
3908  if (len > 0) {
3909  int size = len + 8;
3910  avio_wb32(pb, size);
3911  ffio_wfourcc(pb, name);
3912  avio_write(pb, t->value, len);
3913  return size;
3914  }
3915  return 0;
3916 }
3917 
3918 static int ascii_to_wc(AVIOContext *pb, const uint8_t *b)
3919 {
3920  int val;
3921  while (*b) {
3922  GET_UTF8(val, *b++, return -1;)
3923  avio_wb16(pb, val);
3924  }
3925  avio_wb16(pb, 0x00);
3926  return 0;
3927 }
3928 
3929 static uint16_t language_code(const char *str)
3930 {
3931  return (((str[0] - 0x60) & 0x1F) << 10) +
3932  (((str[1] - 0x60) & 0x1F) << 5) +
3933  (( str[2] - 0x60) & 0x1F);
3934 }
3935 
3936 static int mov_write_3gp_udta_tag(AVIOContext *pb, AVFormatContext *s,
3937  const char *tag, const char *str)
3938 {
3939  int64_t pos = avio_tell(pb);
3940  AVDictionaryEntry *t = av_dict_get(s->metadata, str, NULL, 0);
3941  if (!t || !utf8len(t->value))
3942  return 0;
3943  avio_wb32(pb, 0); /* size */
3944  ffio_wfourcc(pb, tag); /* type */
3945  avio_wb32(pb, 0); /* version + flags */
3946  if (!strcmp(tag, "yrrc"))
3947  avio_wb16(pb, atoi(t->value));
3948  else {
3949  avio_wb16(pb, language_code("eng")); /* language */
3950  avio_write(pb, t->value, strlen(t->value) + 1); /* UTF8 string value */
3951  if (!strcmp(tag, "albm") &&
3952  (t = av_dict_get(s->metadata, "track", NULL, 0)))
3953  avio_w8(pb, atoi(t->value));
3954  }
3955  return update_size(pb, pos);
3956 }
3957 
3958 static int mov_write_chpl_tag(AVIOContext *pb, AVFormatContext *s)
3959 {
3960  int64_t pos = avio_tell(pb);
3961  int i, nb_chapters = FFMIN(s->nb_chapters, 255);
3962 
3963  avio_wb32(pb, 0); // size
3964  ffio_wfourcc(pb, "chpl");
3965  avio_wb32(pb, 0x01000000); // version + flags
3966  avio_wb32(pb, 0); // unknown
3967  avio_w8(pb, nb_chapters);
3968 
3969  for (i = 0; i < nb_chapters; i++) {
3970  AVChapter *c = s->chapters[i];
3971  AVDictionaryEntry *t;
3972  avio_wb64(pb, av_rescale_q(c->start, c->time_base, (AVRational){1,10000000}));
3973 
3974  if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
3975  int len = FFMIN(strlen(t->value), 255);
3976  avio_w8(pb, len);
3977  avio_write(pb, t->value, len);
3978  } else
3979  avio_w8(pb, 0);
3980  }
3981  return update_size(pb, pos);
3982 }
3983 
3984 static int mov_write_udta_tag(AVIOContext *pb, MOVMuxContext *mov,
3985  AVFormatContext *s)
3986 {
3987  AVIOContext *pb_buf;
3988  int ret, size;
3989  uint8_t *buf;
3990 
3991  ret = avio_open_dyn_buf(&pb_buf);
3992  if (ret < 0)
3993  return ret;
3994 
3995  if (mov->mode & MODE_3GP) {
3996  mov_write_3gp_udta_tag(pb_buf, s, "perf", "artist");
3997  mov_write_3gp_udta_tag(pb_buf, s, "titl", "title");
3998  mov_write_3gp_udta_tag(pb_buf, s, "auth", "author");
3999  mov_write_3gp_udta_tag(pb_buf, s, "gnre", "genre");
4000  mov_write_3gp_udta_tag(pb_buf, s, "dscp", "comment");
4001  mov_write_3gp_udta_tag(pb_buf, s, "albm", "album");
4002  mov_write_3gp_udta_tag(pb_buf, s, "cprt", "copyright");
4003  mov_write_3gp_udta_tag(pb_buf, s, "yrrc", "date");
4004  mov_write_loci_tag(s, pb_buf);
4005  } else if (mov->mode == MODE_MOV && !(mov->flags & FF_MOV_FLAG_USE_MDTA)) { // the title field breaks gtkpod with mp4 and my suspicion is that stuff is not valid in mp4
4006  mov_write_string_metadata(s, pb_buf, "\251ART", "artist", 0);
4007  mov_write_string_metadata(s, pb_buf, "\251nam", "title", 0);
4008  mov_write_string_metadata(s, pb_buf, "\251aut", "author", 0);
4009  mov_write_string_metadata(s, pb_buf, "\251alb", "album", 0);
4010  mov_write_string_metadata(s, pb_buf, "\251day", "date", 0);
4011  mov_write_string_metadata(s, pb_buf, "\251swr", "encoder", 0);
4012  // currently ignored by mov.c
4013  mov_write_string_metadata(s, pb_buf, "\251des", "comment", 0);
4014  // add support for libquicktime, this atom is also actually read by mov.c
4015  mov_write_string_metadata(s, pb_buf, "\251cmt", "comment", 0);
4016  mov_write_string_metadata(s, pb_buf, "\251gen", "genre", 0);
4017  mov_write_string_metadata(s, pb_buf, "\251cpy", "copyright", 0);
4018  mov_write_string_metadata(s, pb_buf, "\251mak", "make", 0);
4019  mov_write_string_metadata(s, pb_buf, "\251mod", "model", 0);
4020  mov_write_string_metadata(s, pb_buf, "\251xyz", "location", 0);
4021  mov_write_string_metadata(s, pb_buf, "\251key", "keywords", 0);
4022  mov_write_raw_metadata_tag(s, pb_buf, "XMP_", "xmp");
4023  } else {
4024  /* iTunes meta data */
4025  mov_write_meta_tag(pb_buf, mov, s);
4026  mov_write_loci_tag(s, pb_buf);
4027  }
4028 
4029  if (s->nb_chapters && !(mov->flags & FF_MOV_FLAG_DISABLE_CHPL))
4030  mov_write_chpl_tag(pb_buf, s);
4031 
4032  if ((size = avio_get_dyn_buf(pb_buf, &buf)) > 0) {
4033  avio_wb32(pb, size + 8);
4034  ffio_wfourcc(pb, "udta");
4035  avio_write(pb, buf, size);
4036  }
4037  ffio_free_dyn_buf(&pb_buf);
4038 
4039  return 0;
4040 }
4041 
4042 static void mov_write_psp_udta_tag(AVIOContext *pb,
4043  const char *str, const char *lang, int type)
4044 {
4045  int len = utf8len(str) + 1;
4046  if (len <= 0)
4047  return;
4048  avio_wb16(pb, len * 2 + 10); /* size */
4049  avio_wb32(pb, type); /* type */
4050  avio_wb16(pb, language_code(lang)); /* language */
4051  avio_wb16(pb, 0x01); /* ? */
4052  ascii_to_wc(pb, str);
4053 }
4054 
4055 static int mov_write_uuidusmt_tag(AVIOContext *pb, AVFormatContext *s)
4056 {
4057  AVDictionaryEntry *title = av_dict_get(s->metadata, "title", NULL, 0);
4058  int64_t pos, pos2;
4059 
4060  if (title) {
4061  pos = avio_tell(pb);
4062  avio_wb32(pb, 0); /* size placeholder*/
4063  ffio_wfourcc(pb, "uuid");
4064  ffio_wfourcc(pb, "USMT");
4065  avio_wb32(pb, 0x21d24fce); /* 96 bit UUID */
4066  avio_wb32(pb, 0xbb88695c);
4067  avio_wb32(pb, 0xfac9c740);
4068 
4069  pos2 = avio_tell(pb);
4070  avio_wb32(pb, 0); /* size placeholder*/
4071  ffio_wfourcc(pb, "MTDT");
4072  avio_wb16(pb, 4);
4073 
4074  // ?
4075  avio_wb16(pb, 0x0C); /* size */
4076  avio_wb32(pb, 0x0B); /* type */
4077  avio_wb16(pb, language_code("und")); /* language */
4078  avio_wb16(pb, 0x0); /* ? */
4079  avio_wb16(pb, 0x021C); /* data */
4080 
4081  if (!(s->flags & AVFMT_FLAG_BITEXACT))
4082  mov_write_psp_udta_tag(pb, LIBAVCODEC_IDENT, "eng", 0x04);
4083  mov_write_psp_udta_tag(pb, title->value, "eng", 0x01);
4084  mov_write_psp_udta_tag(pb, "2006/04/01 11:11:11", "und", 0x03);
4085 
4086  update_size(pb, pos2);
4087  return update_size(pb, pos);
4088  }
4089 
4090  return 0;
4091 }
4092 
4093 static void build_chunks(MOVTrack *trk)
4094 {
4095  int i;
4096  MOVIentry *chunk = &trk->cluster[0];
4097  uint64_t chunkSize = chunk->size;
4098  chunk->chunkNum = 1;
4099  if (trk->chunkCount)
4100  return;
4101  trk->chunkCount = 1;
4102  for (i = 1; i<trk->entry; i++){
4103  if (chunk->pos + chunkSize == trk->cluster[i].pos &&
4104  chunkSize + trk->cluster[i].size < (1<<20)){
4105  chunkSize += trk->cluster[i].size;
4106  chunk->samples_in_chunk += trk->cluster[i].entries;
4107  } else {
4108  trk->cluster[i].chunkNum = chunk->chunkNum+1;
4109  chunk=&trk->cluster[i];
4110  chunkSize = chunk->size;
4111  trk->chunkCount++;
4112  }
4113  }
4114 }
4115 
4116 /**
4117  * Assign track ids. If option "use_stream_ids_as_track_ids" is set,
4118  * the stream ids are used as track ids.
4119  *
4120  * This assumes mov->tracks and s->streams are in the same order and
4121  * there are no gaps in either of them (so mov->tracks[n] refers to
4122  * s->streams[n]).
4123  *
4124  * As an exception, there can be more entries in
4125  * s->streams than in mov->tracks, in which case new track ids are
4126  * generated (starting after the largest found stream id).
4127  */
4128 static int mov_setup_track_ids(MOVMuxContext *mov, AVFormatContext *s)
4129 {
4130  int i;
4131 
4132  if (mov->track_ids_ok)
4133  return 0;
4134 
4135  if (mov->use_stream_ids_as_track_ids) {
4136  int next_generated_track_id = 0;
4137  for (i = 0; i < s->nb_streams; i++) {
4138  if (s->streams[i]->id > next_generated_track_id)
4139  next_generated_track_id = s->streams[i]->id;
4140  }
4141 
4142  for (i = 0; i < mov->nb_streams; i++) {
4143  if (mov->tracks[i].entry <= 0 && !(mov->flags & FF_MOV_FLAG_FRAGMENT))
4144  continue;
4145 
4146  mov->tracks[i].track_id = i >= s->nb_streams ? ++next_generated_track_id : s->streams[i]->id;
4147  }
4148  } else {
4149  for (i = 0; i < mov->nb_streams; i++) {
4150  if (mov->tracks[i].entry <= 0 && !(mov->flags & FF_MOV_FLAG_FRAGMENT))
4151  continue;
4152 
4153  mov->tracks[i].track_id = i + 1;
4154  }
4155  }
4156 
4157  mov->track_ids_ok = 1;
4158 
4159  return 0;
4160 }
4161 
4162 static int mov_write_moov_tag(AVIOContext *pb, MOVMuxContext *mov,
4163  AVFormatContext *s)
4164 {
4165  int i;
4166  int64_t pos = avio_tell(pb);
4167  avio_wb32(pb, 0); /* size placeholder*/
4168  ffio_wfourcc(pb, "moov");
4169 
4170  mov_setup_track_ids(mov, s);
4171 
4172  for (i = 0; i < mov->nb_streams; i++) {
4173  if (mov->tracks[i].entry <= 0 && !(mov->flags & FF_MOV_FLAG_FRAGMENT))
4174  continue;
4175 
4176  mov->tracks[i].time = mov->time;
4177 
4178  if (mov->tracks[i].entry)
4179  build_chunks(&mov->tracks[i]);
4180  }
4181 
4182  if (mov->chapter_track)
4183  for (i = 0; i < s->nb_streams; i++) {
4184  mov->tracks[i].tref_tag = MKTAG('c','h','a','p');
4185  mov->tracks[i].tref_id = mov->tracks[mov->chapter_track].track_id;
4186  }
4187  for (i = 0; i < mov->nb_streams; i++) {
4188  MOVTrack *track = &mov->tracks[i];
4189  if (track->tag == MKTAG('r','t','p',' ')) {
4190  track->tref_tag = MKTAG('h','i','n','t');
4191  track->tref_id = mov->tracks[track->src_track].track_id;
4192  } else if (track->par->codec_type == AVMEDIA_TYPE_AUDIO) {
4193  buffer_size_t size;
4194