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wtvenc.c
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1 /*
2  * Windows Television (WTV) muxer
3  * Copyright (c) 2011 Zhentan Feng <spyfeng at gmail dot com>
4  * Copyright (c) 2011 Peter Ross <pross@xvid.org>
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * Windows Television (WTV) demuxer
25  * @author Zhentan Feng <spyfeng at gmail dot com>
26  */
27 
28 #include "libavutil/intreadwrite.h"
29 #include "libavutil/avassert.h"
30 #include "avformat.h"
31 #include "avio_internal.h"
32 #include "internal.h"
33 #include "mpegts.h"
34 #include "wtv.h"
35 
36 #define WTV_BIGSECTOR_SIZE (1 << WTV_BIGSECTOR_BITS)
37 #define INDEX_BASE 0x2
38 #define MAX_NB_INDEX 10
39 
40 /* declare utf16le strings */
41 #define _ , 0,
43  {'t'_'i'_'m'_'e'_'l'_'i'_'n'_'e'_'.'_'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'h'_'e'_'a'_'d'_'e'_'r'_'.'_'E'_'v'_'e'_'n'_'t'_'s', 0};
45  {'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'h'_'e'_'a'_'d'_'e'_'r'_'.'_'l'_'e'_'g'_'a'_'c'_'y'_'_'_'a'_'t'_'t'_'r'_'i'_'b', 0};
47  {'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'r'_'e'_'d'_'i'_'r'_'e'_'c'_'t'_'o'_'r'_'.'_'l'_'e'_'g'_'a'_'c'_'y'_'_'_'a'_'t'_'t'_'r'_'i'_'b', 0};
48 static const uint8_t table_0_header_time[] =
49  {'t'_'a'_'b'_'l'_'e'_'.'_'0'_'.'_'h'_'e'_'a'_'d'_'e'_'r'_'.'_'t'_'i'_'m'_'e', 0};
50 static const uint8_t legacy_attrib[] =
51  {'l'_'e'_'g'_'a'_'c'_'y'_'_'_'a'_'t'_'t'_'r'_'i'_'b', 0};
52 #undef _
53 
54 static const ff_asf_guid sub_wtv_guid =
55  {0x8C,0xC3,0xD2,0xC2,0x7E,0x9A,0xDA,0x11,0x8B,0xF7,0x00,0x07,0xE9,0x5E,0xAD,0x8D};
56 
67 };
68 
69 typedef struct {
70  int64_t length;
71  const void *header;
72  int depth;
74 } WtvFile;
75 
76 typedef struct {
77  int64_t pos;
78  int64_t serial;
79  const ff_asf_guid * guid;
80  int stream_id;
82 
83 typedef struct {
84  int64_t serial;
85  int64_t value;
86 } WtvSyncEntry;
87 
88 typedef struct {
91  int64_t serial; /**< chunk serial number */
92  int64_t last_chunk_pos; /**< last chunk position */
93  int64_t last_timestamp_pos; /**< last timestamp chunk position */
94  int64_t first_index_pos; /**< first index_chunk position */
95 
97  int nb_index;
99 
100  WtvSyncEntry *st_pairs; /* (serial, timestamp) pairs */
102  WtvSyncEntry *sp_pairs; /* (serial, position) pairs */
104 
105  int64_t last_pts;
106  int64_t last_serial;
107 
109 } WtvContext;
110 
111 
112 static void add_serial_pair(WtvSyncEntry ** list, int * count, int64_t serial, int64_t value)
113 {
114  int new_count = *count + 1;
115  WtvSyncEntry *new_list = av_realloc_array(*list, new_count, sizeof(WtvSyncEntry));
116  if (!new_list)
117  return;
118  new_list[*count] = (WtvSyncEntry){serial, value};
119  *list = new_list;
120  *count = new_count;
121 }
122 
124 
125 typedef struct {
126  const uint8_t *header;
130 
131 #define write_pad(pb, size) ffio_fill(pb, 0, size)
132 
133 /**
134  * Write chunk header. If header chunk (0x80000000 set) then add to list of header chunks
135  */
136 static void write_chunk_header(AVFormatContext *s, const ff_asf_guid *guid, int length, int stream_id)
137 {
138  WtvContext *wctx = s->priv_data;
139  AVIOContext *pb = s->pb;
140 
141  wctx->last_chunk_pos = avio_tell(pb) - wctx->timeline_start_pos;
142  ff_put_guid(pb, guid);
143  avio_wl32(pb, 32 + length);
144  avio_wl32(pb, stream_id);
145  avio_wl64(pb, wctx->serial);
146 
147  if ((stream_id & 0x80000000) && guid != &ff_index_guid) {
148  WtvChunkEntry *t = wctx->index + wctx->nb_index;
150  t->pos = wctx->last_chunk_pos;
151  t->serial = wctx->serial;
152  t->guid = guid;
153  t->stream_id = stream_id & 0x3FFFFFFF;
154  wctx->nb_index++;
155  }
156 }
157 
158 static void write_chunk_header2(AVFormatContext *s, const ff_asf_guid *guid, int stream_id)
159 {
160  WtvContext *wctx = s->priv_data;
161  AVIOContext *pb = s->pb;
162 
163  int64_t last_chunk_pos = wctx->last_chunk_pos;
164  write_chunk_header(s, guid, 0, stream_id); // length updated later
165  avio_wl64(pb, last_chunk_pos);
166 }
167 
169 {
170  WtvContext *wctx = s->priv_data;
171  AVIOContext *pb = s->pb;
172 
173  // update the chunk_len field and pad.
174  int64_t chunk_len = avio_tell(pb) - (wctx->last_chunk_pos + wctx->timeline_start_pos);
175  avio_seek(pb, -(chunk_len - 16), SEEK_CUR);
176  avio_wl32(pb, chunk_len);
177  avio_seek(pb, chunk_len - (16 + 4), SEEK_CUR);
178 
179  write_pad(pb, WTV_PAD8(chunk_len) - chunk_len);
180  wctx->serial++;
181 }
182 
184 {
185  AVIOContext *pb = s->pb;
186  WtvContext *wctx = s->priv_data;
187  int i;
188 
189  write_chunk_header2(s, &ff_index_guid, 0x80000000);
190  avio_wl32(pb, 0);
191  avio_wl32(pb, 0);
192 
193  for (i = 0; i < wctx->nb_index; i++) {
194  WtvChunkEntry *t = wctx->index + i;
195  ff_put_guid(pb, t->guid);
196  avio_wl64(pb, t->pos);
197  avio_wl32(pb, t->stream_id);
198  avio_wl32(pb, 0); // checksum?
199  avio_wl64(pb, t->serial);
200  }
201  wctx->nb_index = 0; // reset index
203 
204  if (!wctx->first_index_pos)
205  wctx->first_index_pos = wctx->last_chunk_pos;
206 }
207 
209 {
210  WtvContext *wctx = s->priv_data;
212  if (wctx->nb_index == MAX_NB_INDEX)
213  write_index(s);
214 }
215 
217 {
219  unsigned int num, den;
220  av_reduce(&num, &den, dar.num, dar.den, 0xFFFFFFFF);
221 
222  /* VIDEOINFOHEADER2 */
223  avio_wl32(pb, 0);
224  avio_wl32(pb, 0);
225  avio_wl32(pb, st->codecpar->width);
226  avio_wl32(pb, st->codecpar->height);
227 
228  avio_wl32(pb, 0);
229  avio_wl32(pb, 0);
230  avio_wl32(pb, 0);
231  avio_wl32(pb, 0);
232 
233  avio_wl32(pb, st->codecpar->bit_rate);
234  avio_wl32(pb, 0);
235  avio_wl64(pb, st->avg_frame_rate.num && st->avg_frame_rate.den ? INT64_C(10000000) / av_q2d(st->avg_frame_rate) : 0);
236  avio_wl32(pb, 0);
237  avio_wl32(pb, 0);
238 
239  avio_wl32(pb, num);
240  avio_wl32(pb, den);
241  avio_wl32(pb, 0);
242  avio_wl32(pb, 0);
243 
244  ff_put_bmp_header(pb, st->codecpar, ff_codec_bmp_tags, 0, 1);
245 
246  if (st->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
247  int padding = (st->codecpar->extradata_size & 3) ? 4 - (st->codecpar->extradata_size & 3) : 0;
248  /* MPEG2VIDEOINFO */
249  avio_wl32(pb, 0);
250  avio_wl32(pb, st->codecpar->extradata_size + padding);
251  avio_wl32(pb, -1);
252  avio_wl32(pb, -1);
253  avio_wl32(pb, 0);
254  avio_write(pb, st->codecpar->extradata, st->codecpar->extradata_size);
255  ffio_fill(pb, 0, padding);
256  }
257 }
258 
260 {
261  const ff_asf_guid *g, *media_type, *format_type;
262  const AVCodecTag *tags;
263  AVIOContext *pb = s->pb;
264  int64_t hdr_pos_start;
265  int hdr_size = 0;
266 
267  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
269  media_type = &ff_mediatype_video;
271  tags = ff_codec_bmp_tags;
272  } else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
274  media_type = &ff_mediatype_audio;
275  format_type = &ff_format_waveformatex;
276  tags = ff_codec_wav_tags;
277  } else {
278  av_log(s, AV_LOG_ERROR, "unknown codec_type (0x%x)\n", st->codecpar->codec_type);
279  return -1;
280  }
281 
282  ff_put_guid(pb, media_type); // mediatype
284  write_pad(pb, 12);
285  ff_put_guid(pb,&ff_format_cpfilters_processed); // format type
286  avio_wl32(pb, 0); // size
287 
288  hdr_pos_start = avio_tell(pb);
289  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
290  put_videoinfoheader2(pb, st);
291  } else {
292  if (ff_put_wav_header(s, pb, st->codecpar, 0) < 0)
293  format_type = &ff_format_none;
294  }
295  hdr_size = avio_tell(pb) - hdr_pos_start;
296 
297  // seek back write hdr_size
298  avio_seek(pb, -(hdr_size + 4), SEEK_CUR);
299  avio_wl32(pb, hdr_size + 32);
300  avio_seek(pb, hdr_size, SEEK_CUR);
301  if (g) {
302  ff_put_guid(pb, g); // actual_subtype
303  } else {
304  int tag = ff_codec_get_tag(tags, st->codecpar->codec_id);
305  if (!tag) {
306  av_log(s, AV_LOG_ERROR, "unsupported codec_id (0x%x)\n", st->codecpar->codec_id);
307  return -1;
308  }
309  avio_wl32(pb, tag);
310  avio_write(pb, (const uint8_t[]){FF_MEDIASUBTYPE_BASE_GUID}, 12);
311  }
312  ff_put_guid(pb, format_type); // actual_formattype
313 
314  return 0;
315 }
316 
318 {
319  AVIOContext *pb = s->pb;
320  int ret;
321  write_chunk_header2(s, &ff_stream1_guid, 0x80000000 | 0x01);
322 
323  avio_wl32(pb, 0x01);
324  write_pad(pb, 4);
325  write_pad(pb, 4);
326 
327  ret = write_stream_codec_info(s, st);
328  if (ret < 0) {
329  av_log(s, AV_LOG_ERROR, "write stream codec info failed codec_type(0x%x)\n", st->codecpar->codec_type);
330  return -1;
331  }
332 
333  finish_chunk(s);
334  return 0;
335 }
336 
338 {
339  AVIOContext *pb = s->pb;
340  WtvContext *wctx = s->priv_data;
341  int64_t last_chunk_pos = wctx->last_chunk_pos;
342 
343  write_chunk_header(s, &ff_sync_guid, 0x18, 0);
344  avio_wl64(pb, wctx->first_index_pos);
345  avio_wl64(pb, wctx->last_timestamp_pos);
346  avio_wl64(pb, 0);
347 
348  finish_chunk(s);
349  add_serial_pair(&wctx->sp_pairs, &wctx->nb_sp_pairs, wctx->serial, wctx->last_chunk_pos);
350 
351  wctx->last_chunk_pos = last_chunk_pos;
352 }
353 
355 {
356  AVIOContext *pb = s->pb;
357  int ret;
358 
360  avio_wl32(pb, 0x00000001);
361  avio_wl32(pb, st->index + INDEX_BASE); //stream_id
362  avio_wl32(pb, 0x00000001);
363  write_pad(pb, 8);
364 
365  ret = write_stream_codec_info(s, st);
366  if (ret < 0) {
367  av_log(s, AV_LOG_ERROR, "write stream codec info failed codec_type(0x%x)\n", st->codecpar->codec_type);
368  return -1;
369  }
370  finish_chunk(s);
371 
372  avpriv_set_pts_info(st, 64, 1, 10000000);
373 
374  return 0;
375 }
376 
378 {
379  AVIOContext *pb = s->pb;
380  WtvContext *wctx = s->priv_data;
381  int i, pad, ret;
382  AVStream *st;
383 
384  wctx->last_chunk_pos = -1;
385  wctx->last_timestamp_pos = -1;
386 
387  ff_put_guid(pb, &ff_wtv_guid);
389 
390  avio_wl32(pb, 0x01);
391  avio_wl32(pb, 0x02);
392  avio_wl32(pb, 1 << WTV_SECTOR_BITS);
393  avio_wl32(pb, 1 << WTV_BIGSECTOR_BITS);
394 
395  //write initial root fields
396  avio_wl32(pb, 0); // root_size, update later
397  write_pad(pb, 4);
398  avio_wl32(pb, 0); // root_sector, update it later.
399 
400  write_pad(pb, 32);
401  avio_wl32(pb, 0); // file ends pointer, update it later.
402 
403  pad = (1 << WTV_SECTOR_BITS) - avio_tell(pb);
404  write_pad(pb, pad);
405 
406  wctx->timeline_start_pos = avio_tell(pb);
407 
408  wctx->serial = 1;
409  wctx->last_chunk_pos = -1;
410  wctx->first_video_flag = 1;
411 
412  for (i = 0; i < s->nb_streams; i++) {
413  st = s->streams[i];
414  if (st->codecpar->codec_id == AV_CODEC_ID_MJPEG)
415  continue;
416  ret = write_stream_codec(s, st);
417  if (ret < 0) {
418  av_log(s, AV_LOG_ERROR, "write stream codec failed codec_type(0x%x)\n", st->codecpar->codec_type);
419  return -1;
420  }
421  if (!i)
422  write_sync(s);
423  }
424 
425  for (i = 0; i < s->nb_streams; i++) {
426  st = s->streams[i];
427  if (st->codecpar->codec_id == AV_CODEC_ID_MJPEG)
428  continue;
429  ret = write_stream_data(s, st);
430  if (ret < 0) {
431  av_log(s, AV_LOG_ERROR, "write stream data failed codec_type(0x%x)\n", st->codecpar->codec_type);
432  return -1;
433  }
434  }
435 
436  if (wctx->nb_index)
437  write_index(s);
438 
439  return 0;
440 }
441 
443 {
444  AVIOContext *pb = s->pb;
445  WtvContext *wctx = s->priv_data;
447 
448  write_chunk_header(s, &ff_timestamp_guid, 56, 0x40000000 | (INDEX_BASE + pkt->stream_index));
449  write_pad(pb, 8);
450  avio_wl64(pb, pkt->pts == AV_NOPTS_VALUE ? -1 : pkt->pts);
451  avio_wl64(pb, pkt->pts == AV_NOPTS_VALUE ? -1 : pkt->pts);
452  avio_wl64(pb, pkt->pts == AV_NOPTS_VALUE ? -1 : pkt->pts);
453  avio_wl64(pb, 0);
454  avio_wl64(pb, par->codec_type == AVMEDIA_TYPE_VIDEO && (pkt->flags & AV_PKT_FLAG_KEY) ? 1 : 0);
455  avio_wl64(pb, 0);
456 
457  wctx->last_timestamp_pos = wctx->last_chunk_pos;
458 }
459 
461 {
462  AVIOContext *pb = s->pb;
463  WtvContext *wctx = s->priv_data;
464  AVStream *st = s->streams[pkt->stream_index];
465 
466  if (st->codecpar->codec_id == AV_CODEC_ID_MJPEG && !wctx->thumbnail.size) {
467  av_copy_packet(&wctx->thumbnail, pkt);
468  return 0;
469  } else if (st->codecpar->codec_id == AV_CODEC_ID_H264) {
470  int ret = ff_check_h264_startcode(s, st, pkt);
471  if (ret < 0)
472  return ret;
473  }
474 
475  /* emit sync chunk and 'timeline.table.0.entries.Event' record every 50 frames */
476  if (wctx->serial - (wctx->nb_sp_pairs ? wctx->sp_pairs[wctx->nb_sp_pairs - 1].serial : 0) >= 50)
477  write_sync(s);
478 
479  /* emit 'table.0.entries.time' record every 500ms */
480  if (pkt->pts != AV_NOPTS_VALUE && pkt->pts - (wctx->nb_st_pairs ? wctx->st_pairs[wctx->nb_st_pairs - 1].value : 0) >= 5000000)
481  add_serial_pair(&wctx->st_pairs, &wctx->nb_st_pairs, wctx->serial, pkt->pts);
482 
483  if (pkt->pts != AV_NOPTS_VALUE && pkt->pts > wctx->last_pts) {
484  wctx->last_pts = pkt->pts;
485  wctx->last_serial = wctx->serial;
486  }
487 
488  // write timestamp chunk
489  write_timestamp(s, pkt);
490 
492  avio_write(pb, pkt->data, pkt->size);
493  write_pad(pb, WTV_PAD8(pkt->size) - pkt->size);
494 
495  wctx->serial++;
496  return 0;
497 }
498 
500 {
501  avio_wl32(pb, 0x10);
502  write_pad(pb, 84);
503  avio_wl64(pb, 0x32);
504  return 96;
505 }
506 
508 {
509  int pad = 0;
510  avio_wl32(pb, 0xFFFFFFFF);
511  write_pad(pb, 12);
512  avio_write(pb, legacy_attrib, sizeof(legacy_attrib));
513  pad = WTV_PAD8(sizeof(legacy_attrib)) - sizeof(legacy_attrib);
514  write_pad(pb, pad);
515  write_pad(pb, 32);
516  return 48 + WTV_PAD8(sizeof(legacy_attrib));
517 }
518 
520 {
521  avio_wl32(pb, 0x10);
522  write_pad(pb, 76);
523  avio_wl64(pb, 0x40);
524  return 88;
525 }
526 
536 };
537 
538 static int write_root_table(AVFormatContext *s, int64_t sector_pos)
539 {
540  AVIOContext *pb = s->pb;
541  WtvContext *wctx = s->priv_data;
542  int size, pad;
543  int i;
544 
546  for (i = 0; i < sizeof(wtv_root_entry_table)/sizeof(WTVRootEntryTable); i++, h++) {
547  WtvFile *w = &wctx->file[i];
548  int filename_padding = WTV_PAD8(h->header_size) - h->header_size;
549  WTVHeaderWriteFunc *write = h->write_header;
550  int len = 0;
551  int64_t len_pos;
552 
554  len_pos = avio_tell(pb);
555  avio_wl16(pb, 40 + h->header_size + filename_padding + 8); // maybe updated later
556  write_pad(pb, 6);
557  avio_wl64(pb, write ? 0 : w->length);// maybe update later
558  avio_wl32(pb, (h->header_size + filename_padding) >> 1);
559  write_pad(pb, 4);
560 
561  avio_write(pb, h->header, h->header_size);
562  write_pad(pb, filename_padding);
563 
564  if (write) {
565  len = write(pb);
566  // update length field
567  avio_seek(pb, len_pos, SEEK_SET);
568  avio_wl64(pb, 40 + h->header_size + filename_padding + len);
569  avio_wl64(pb, len |(1ULL<<62) | (1ULL<<60));
570  avio_seek(pb, 8 + h->header_size + filename_padding + len, SEEK_CUR);
571  } else {
572  avio_wl32(pb, w->first_sector);
573  avio_wl32(pb, w->depth);
574  }
575  }
576 
577  // caculate root table size
578  size = avio_tell(pb) - sector_pos;
579  pad = WTV_SECTOR_SIZE- size;
580  write_pad(pb, pad);
581 
582  return size;
583 }
584 
585 static void write_fat(AVIOContext *pb, int start_sector, int nb_sectors, int shift)
586 {
587  int i;
588  for (i = 0; i < nb_sectors; i++) {
589  avio_wl32(pb, start_sector + (i << shift));
590  }
591  // pad left sector pointer size
592  write_pad(pb, WTV_SECTOR_SIZE - ((nb_sectors << 2) % WTV_SECTOR_SIZE));
593 }
594 
595 static int64_t write_fat_sector(AVFormatContext *s, int64_t start_pos, int nb_sectors, int sector_bits, int depth)
596 {
597  int64_t start_sector = start_pos >> WTV_SECTOR_BITS;
598  int shift = sector_bits - WTV_SECTOR_BITS;
599 
600  int64_t fat = avio_tell(s->pb);
601  write_fat(s->pb, start_sector, nb_sectors, shift);
602 
603  if (depth == 2) {
604  int64_t start_sector1 = fat >> WTV_SECTOR_BITS;
605  int nb_sectors1 = ((nb_sectors << 2) + WTV_SECTOR_SIZE - 1) / WTV_SECTOR_SIZE;
606  int64_t fat1 = avio_tell(s->pb);
607 
608  write_fat(s->pb, start_sector1, nb_sectors1, 0);
609  return fat1;
610  }
611 
612  return fat;
613 }
614 
616 {
617  AVIOContext *pb = s->pb;
618  WtvContext *wctx = s->priv_data;
619  int i;
620  for (i = 0; i < wctx->nb_sp_pairs; i++) {
621  avio_wl64(pb, wctx->sp_pairs[i].serial);
622  avio_wl64(pb, wctx->sp_pairs[i].value);
623  }
624 }
625 
627 {
628  AVIOContext *pb = s->pb;
629  WtvContext *wctx = s->priv_data;
630  int i;
631  for (i = 0; i < wctx->nb_st_pairs; i++) {
632  avio_wl64(pb, wctx->st_pairs[i].value);
633  avio_wl64(pb, wctx->st_pairs[i].serial);
634  }
635  avio_wl64(pb, wctx->last_pts);
636  avio_wl64(pb, wctx->last_serial);
637 }
638 
639 static void write_metadata_header(AVIOContext *pb, int type, const char *key, int value_size)
640 {
642  avio_wl32(pb, type);
643  avio_wl32(pb, value_size);
644  avio_put_str16le(pb, key);
645 }
646 
647 static int metadata_header_size(const char *key)
648 {
649  return 16 + 4 + 4 + strlen(key)*2 + 2;
650 }
651 
652 static void write_tag_int32(AVIOContext *pb, const char *key, int value)
653 {
654  write_metadata_header(pb, 0, key, 4);
655  avio_wl32(pb, value);
656 }
657 
658 static void write_tag(AVIOContext *pb, const char *key, const char *value)
659 {
660  write_metadata_header(pb, 1, key, strlen(value)*2 + 2);
661  avio_put_str16le(pb, value);
662 }
663 
665 {
666  return strlen("image/jpeg")*2 + 2 + 1 + (e ? strlen(e->value)*2 : 0) + 2 + 4 + pkt->size;
667 }
668 
670 {
671  WtvContext *wctx = s->priv_data;
672  AVIOContext *pb = s->pb;
673  AVDictionaryEntry *tag = 0;
674 
676  //FIXME: translate special tags (e.g. WM/Bitrate) to binary representation
678  while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX)))
679  write_tag(pb, tag->key, tag->value);
680 
681  if (wctx->thumbnail.size) {
682  AVStream *st = s->streams[wctx->thumbnail.stream_index];
683  tag = av_dict_get(st->metadata, "title", NULL, 0);
684  write_metadata_header(pb, 2, "WM/Picture", attachment_value_size(&wctx->thumbnail, tag));
685 
686  avio_put_str16le(pb, "image/jpeg");
687  avio_w8(pb, 0x10);
688  avio_put_str16le(pb, tag ? tag->value : "");
689 
690  avio_wl32(pb, wctx->thumbnail.size);
691  avio_write(pb, wctx->thumbnail.data, wctx->thumbnail.size);
692 
693  write_tag_int32(pb, "WM/MediaThumbType", 2);
694  }
695 }
696 
698 {
699  WtvContext *wctx = s->priv_data;
700  AVIOContext *pb = s->pb;
701  AVDictionaryEntry *tag = 0;
702  int64_t pos = 0;
703 
704  //FIXME: translate special tags to binary representation
705  while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {
706  avio_wl64(pb, pos);
707  pos += metadata_header_size(tag->key) + strlen(tag->value)*2 + 2;
708  }
709 
710  if (wctx->thumbnail.size) {
711  AVStream *st = s->streams[wctx->thumbnail.stream_index];
712  avio_wl64(pb, pos);
713  pos += metadata_header_size("WM/Picture") + attachment_value_size(&wctx->thumbnail, av_dict_get(st->metadata, "title", NULL, 0));
714 
715  avio_wl64(pb, pos);
716  pos += metadata_header_size("WM/MediaThumbType") + 4;
717  }
718 }
719 
720 /**
721  * Pad the remainder of a file
722  * Write out fat table
723  * @return <0 on error
724  */
725 static int finish_file(AVFormatContext *s, enum WtvFileIndex index, int64_t start_pos)
726 {
727  WtvContext *wctx = s->priv_data;
728  AVIOContext *pb = s->pb;
729  WtvFile *w = &wctx->file[index];
730  int64_t end_pos = avio_tell(pb);
731  int sector_bits, nb_sectors, pad;
732 
733  av_assert0(index < WTV_FILES);
734 
735  w->length = (end_pos - start_pos);
736 
737  // determine optimal fat table depth, sector_bits, nb_sectors
738  if (w->length <= WTV_SECTOR_SIZE) {
739  w->depth = 0;
740  sector_bits = WTV_SECTOR_BITS;
741  } else if (w->length <= (WTV_SECTOR_SIZE / 4) * WTV_SECTOR_SIZE) {
742  w->depth = 1;
743  sector_bits = WTV_SECTOR_BITS;
744  } else if (w->length <= (WTV_SECTOR_SIZE / 4) * WTV_BIGSECTOR_SIZE) {
745  w->depth = 1;
746  sector_bits = WTV_BIGSECTOR_BITS;
747  } else if (w->length <= (int64_t)(WTV_SECTOR_SIZE / 4) * (WTV_SECTOR_SIZE / 4) * WTV_SECTOR_SIZE) {
748  w->depth = 2;
749  sector_bits = WTV_SECTOR_BITS;
750  } else if (w->length <= (int64_t)(WTV_SECTOR_SIZE / 4) * (WTV_SECTOR_SIZE / 4) * WTV_BIGSECTOR_SIZE) {
751  w->depth = 2;
752  sector_bits = WTV_BIGSECTOR_BITS;
753  } else {
754  av_log(s, AV_LOG_ERROR, "unsupported file allocation table depth (%"PRIi64" bytes)\n", w->length);
755  return -1;
756  }
757 
758  // determine the nb_sectors
759  nb_sectors = (int)(w->length >> sector_bits);
760 
761  // pad sector of timeline
762  pad = (1 << sector_bits) - (w->length % (1 << sector_bits));
763  if (pad) {
764  nb_sectors++;
765  write_pad(pb, pad);
766  }
767 
768  //write fat table
769  if (w->depth > 0) {
770  w->first_sector = write_fat_sector(s, start_pos, nb_sectors, sector_bits, w->depth) >> WTV_SECTOR_BITS;
771  } else {
772  w->first_sector = start_pos >> WTV_SECTOR_BITS;
773  }
774 
775  w->length |= 1ULL<<60;
776  if (sector_bits == WTV_SECTOR_BITS)
777  w->length |= 1ULL<<63;
778 
779  return 0;
780 }
781 
783 {
784  WtvContext *wctx = s->priv_data;
785  AVIOContext *pb = s->pb;
786  int root_size;
787  int64_t sector_pos;
788  int64_t start_pos, file_end_pos;
789 
790  if (finish_file(s, WTV_TIMELINE, wctx->timeline_start_pos) < 0)
791  return -1;
792 
793  start_pos = avio_tell(pb);
795  if (finish_file(s, WTV_TIMELINE_TABLE_0_ENTRIES_EVENTS, start_pos) < 0)
796  return -1;
797 
798  start_pos = avio_tell(pb);
800  if (finish_file(s, WTV_TABLE_0_ENTRIES_LEGACY_ATTRIB, start_pos) < 0)
801  return -1;
802 
803  start_pos = avio_tell(pb);
805  if (finish_file(s, WTV_TABLE_0_REDIRECTOR_LEGACY_ATTRIB, start_pos) < 0)
806  return -1;
807 
808  start_pos = avio_tell(pb);
810  if (finish_file(s, WTV_TABLE_0_ENTRIES_TIME, start_pos) < 0)
811  return -1;
812 
813  // write root table
814  sector_pos = avio_tell(pb);
815  root_size = write_root_table(s, sector_pos);
816 
817  file_end_pos = avio_tell(pb);
818  // update root value
819  avio_seek(pb, 0x30, SEEK_SET);
820  avio_wl32(pb, root_size);
821  avio_seek(pb, 4, SEEK_CUR);
822  avio_wl32(pb, sector_pos >> WTV_SECTOR_BITS);
823  avio_seek(pb, 0x5c, SEEK_SET);
824  avio_wl32(pb, file_end_pos >> WTV_SECTOR_BITS);
825 
826  avio_flush(pb);
827 
828  av_free(wctx->sp_pairs);
829  av_free(wctx->st_pairs);
830  av_packet_unref(&wctx->thumbnail);
831  return 0;
832 }
833 
835  .name = "wtv",
836  .long_name = NULL_IF_CONFIG_SMALL("Windows Television (WTV)"),
837  .extensions = "wtv",
838  .priv_data_size = sizeof(WtvContext),
839  .audio_codec = AV_CODEC_ID_AC3,
840  .video_codec = AV_CODEC_ID_MPEG2VIDEO,
844  .codec_tag = (const AVCodecTag* const []){ ff_codec_bmp_tags,
845  ff_codec_wav_tags, 0 },
846 };
const uint8_t ff_table_0_entries_time_le16[40]
Definition: wtv_common.c:56
int first_video_flag
Definition: wtvenc.c:98
#define WTV_SECTOR_BITS
Definition: wtv.h:28
const ff_asf_guid ff_metadata_guid
Definition: wtv_common.c:62
#define NULL
Definition: coverity.c:32
#define _
Definition: wtvenc.c:41
static void write_table_entries_time(AVFormatContext *s)
Definition: wtvenc.c:626
const ff_asf_guid ff_SBE2_STREAM_DESC_EVENT
Definition: wtv_common.c:33
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:429
const char * s
Definition: avisynth_c.h:631
Bytestream IO Context.
Definition: avio.h:111
static int shift(int a, int b)
Definition: sonic.c:82
#define WTV_BIGSECTOR_BITS
Definition: wtv.h:30
static int attachment_value_size(const AVPacket *pkt, const AVDictionaryEntry *e)
Definition: wtvenc.c:664
int ff_put_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int flags)
Write WAVEFORMAT header structure.
Definition: riffenc.c:54
WtvSyncEntry * st_pairs
Definition: wtvenc.c:100
void ff_put_guid(AVIOContext *s, const ff_asf_guid *g)
Definition: riffenc.c:346
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4404
const char * g
Definition: vf_curves.c:108
static void write_fat(AVIOContext *pb, int start_sector, int nb_sectors, int shift)
Definition: wtvenc.c:585
int nb_index
Definition: wtvenc.c:97
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3915
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown)
Definition: avformat.h:943
int index
stream index in AVFormatContext
Definition: avformat.h:877
int size
Definition: avcodec.h:1578
const ff_asf_guid * ff_get_codec_guid(enum AVCodecID id, const AVCodecGuid *av_guid)
Definition: riffenc.c:352
WtvFileIndex
Definition: wtvenc.c:57
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:213
static int64_t write_fat_sector(AVFormatContext *s, int64_t start_pos, int nb_sectors, int sector_bits, int depth)
Definition: wtvenc.c:595
const ff_asf_guid ff_mediatype_video
Definition: wtv_common.c:43
static void write_chunk_header2(AVFormatContext *s, const ff_asf_guid *guid, int stream_id)
Definition: wtvenc.c:158
unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
Definition: utils.c:2934
static AVPacket pkt
const void * header
Definition: wtvenc.c:71
int64_t last_timestamp_pos
last timestamp chunk position
Definition: wtvenc.c:93
static int write_table0_header_time(AVIOContext *pb)
Definition: wtvenc.c:519
const ff_asf_guid ff_format_waveformatex
Definition: wtv_common.c:74
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3907
const AVCodecGuid ff_codec_wav_guids[]
Definition: riff.c:538
static int write_root_table(AVFormatContext *s, int64_t sector_pos)
Definition: wtvenc.c:538
Format I/O context.
Definition: avformat.h:1319
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
static void write_table_redirector_legacy_attrib(AVFormatContext *s)
Definition: wtvenc.c:697
const ff_asf_guid ff_data_guid
Definition: wtv_common.c:31
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:329
uint8_t
#define FF_MEDIASUBTYPE_BASE_GUID
Definition: riff.h:108
static void add_serial_pair(WtvSyncEntry **list, int *count, int64_t serial, int64_t value)
Definition: wtvenc.c:112
int width
Video only.
Definition: avcodec.h:3981
static void put_videoinfoheader2(AVIOContext *pb, AVStream *st)
Definition: wtvenc.c:216
static const uint8_t table_0_redirector_legacy_attrib[]
Definition: wtvenc.c:46
int64_t length
Definition: wtvdec.c:59
int stream_id
Definition: wtvenc.c:80
const ff_asf_guid ff_mediatype_audio
Definition: wtv_common.c:41
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1387
const ff_asf_guid ff_mediasubtype_cpfilters_processed
Definition: wtv_common.c:68
static double av_q2d(AVRational a)
Convert rational to double.
Definition: rational.h:80
static const ff_asf_guid sub_wtv_guid
Definition: wtvenc.c:54
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:39
uint8_t * data
Definition: avcodec.h:1577
static int write_stream_codec(AVFormatContext *s, AVStream *st)
Definition: wtvenc.c:317
AVRational av_mul_q(AVRational b, AVRational c)
Multiply two rationals.
Definition: rational.c:80
static void finish_chunk_noindex(AVFormatContext *s)
Definition: wtvenc.c:168
static int metadata_header_size(const char *key)
Definition: wtvenc.c:647
uint32_t tag
Definition: movenc.c:1353
ptrdiff_t size
Definition: opengl_enc.c:101
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:447
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:187
const ff_asf_guid ff_sync_guid
Definition: wtv_common.c:37
#define av_log(a,...)
WTVHeaderWriteFunc * write_header
Definition: wtvenc.c:128
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: avcodec.h:1609
void avio_wl64(AVIOContext *s, uint64_t val)
Definition: aviobuf.c:417
WtvChunkEntry index[MAX_NB_INDEX]
Definition: wtvenc.c:96
const uint8_t ff_table_0_entries_legacy_attrib_le16[58]
Definition: wtv_common.c:54
Definition: wtvdec.c:50
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVDictionary * metadata
Metadata that applies to the whole file.
Definition: avformat.h:1533
static void write_sync(AVFormatContext *s)
Definition: wtvenc.c:337
int ff_check_h264_startcode(AVFormatContext *s, const AVStream *st, const AVPacket *pkt)
Check presence of H264 startcode.
Definition: mpegtsenc.c:1394
static const uint8_t legacy_attrib[]
Definition: wtvenc.c:50
int WTVHeaderWriteFunc(AVIOContext *pb)
Definition: wtvenc.c:123
static void write_chunk_header(AVFormatContext *s, const ff_asf_guid *guid, int length, int stream_id)
Write chunk header.
Definition: wtvenc.c:136
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
int64_t timeline_start_pos
Definition: wtvenc.c:89
WtvSyncEntry * sp_pairs
Definition: wtvenc.c:102
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3911
simple assert() macros that are a bit more flexible than ISO C assert().
GLsizei GLsizei * length
Definition: opengl_enc.c:115
#define INDEX_BASE
Definition: wtvenc.c:37
int ff_standardize_creation_time(AVFormatContext *s)
Standardize creation_time metadata in AVFormatContext to an ISO-8601 timestamp string.
Definition: utils.c:5068
int64_t last_pts
Definition: wtvenc.c:105
static void write_index(AVFormatContext *s)
Definition: wtvenc.c:183
GLsizei count
Definition: opengl_enc.c:109
void ff_put_bmp_header(AVIOContext *pb, AVCodecParameters *par, const AVCodecTag *tags, int for_asf, int ignore_extradata)
Definition: riffenc.c:207
const AVCodecTag ff_codec_wav_tags[]
Definition: riff.c:428
const uint8_t ff_timeline_table_0_entries_Events_le16[62]
Definition: wtv_common.c:52
int depth
Definition: v4l.c:62
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1583
#define write_pad(pb, size)
Definition: wtvenc.c:131
int av_reduce(int *dst_num, int *dst_den, int64_t num, int64_t den, int64_t max)
Reduce a fraction.
Definition: rational.c:35
const ff_asf_guid ff_format_cpfilters_processed
Definition: wtv_common.c:72
static const uint8_t table_0_header_time[]
Definition: wtvenc.c:48
const uint8_t * header
Definition: wtvenc.c:126
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1375
static const WTVRootEntryTable wtv_root_entry_table[]
Definition: wtvenc.c:527
int void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:207
void ffio_fill(AVIOContext *s, int b, int count)
Definition: aviobuf.c:173
const AVCodecTag ff_codec_bmp_tags[]
Definition: riff.c:32
int depth
Definition: wtvenc.c:72
static int write_table0_header_legacy_attrib(AVIOContext *pb)
Definition: wtvenc.c:507
GLsizei GLboolean const GLfloat * value
Definition: opengl_enc.c:109
const uint8_t ff_timeline_le16[16]
Definition: wtv_common.c:50
#define WTV_PAD8(x)
Definition: wtv.h:31
const char * name
Definition: avformat.h:522
const ff_asf_guid ff_timestamp_guid
Definition: wtv_common.c:29
static void write_table_entries_attrib(AVFormatContext *s)
Definition: wtvenc.c:669
AVDictionary * metadata
Definition: avformat.h:945
const ff_asf_guid ff_format_mpeg2_video
Definition: wtv_common.c:76
static const uint8_t timeline_table_0_header_events[]
Definition: wtvenc.c:42
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:194
static int finish_file(AVFormatContext *s, enum WtvFileIndex index, int64_t start_pos)
Pad the remainder of a file Write out fat table.
Definition: wtvenc.c:725
uint8_t ff_asf_guid[16]
Definition: riff.h:89
Stream structure.
Definition: avformat.h:876
static void write_timestamp(AVFormatContext *s, AVPacket *pkt)
Definition: wtvenc.c:442
#define WTV_SECTOR_SIZE
Definition: wtv.h:29
AVIOContext * pb
I/O context.
Definition: avformat.h:1361
int first_sector
Definition: wtvenc.c:73
static int write_stream_codec_info(AVFormatContext *s, AVStream *st)
Definition: wtvenc.c:259
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:165
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:549
int av_copy_packet(AVPacket *dst, const AVPacket *src)
Copy packet, including contents.
Definition: avpacket.c:246
static int write_trailer(AVFormatContext *s)
Definition: wtvenc.c:782
GLint GLenum type
Definition: opengl_enc.c:105
#define MAX_NB_INDEX
Definition: wtvenc.c:38
const ff_asf_guid ff_index_guid
Definition: wtv_common.c:39
int index
Definition: gxfenc.c:89
rational number numerator/denominator
Definition: rational.h:43
static void finish_chunk(AVFormatContext *s)
Definition: wtvenc.c:208
const AVCodecGuid ff_video_guids[]
Definition: wtv_common.c:81
int avio_put_str16le(AVIOContext *s, const char *str)
Convert an UTF-8 string to UTF-16LE and write it.
const AVMetadataConv ff_asf_metadata_conv[]
Definition: asf.c:159
WtvFile file[WTV_FILES]
Definition: wtvenc.c:90
static int write_table0_header_events(AVIOContext *pb)
Definition: wtvenc.c:499
int nb_st_pairs
Definition: wtvenc.c:101
int64_t value
Definition: wtvenc.c:85
AVOutputFormat ff_wtv_muxer
Definition: wtvenc.c:834
int64_t serial
Definition: wtvenc.c:84
static int write_header(AVFormatContext *s)
Definition: wtvenc.c:377
static void write_tag(AVIOContext *pb, const char *key, const char *value)
Definition: wtvenc.c:658
Main libavformat public API header.
const ff_asf_guid ff_dir_entry_guid
Definition: wtv_common.c:25
static int write_stream_data(AVFormatContext *s, AVStream *st)
Definition: wtvenc.c:354
#define WTV_BIGSECTOR_SIZE
Definition: wtvenc.c:36
int64_t serial
chunk serial number
Definition: wtvenc.c:91
void * av_realloc_array(void *ptr, size_t nmemb, size_t size)
Definition: mem.c:208
static const uint8_t table_0_header_legacy_attrib[]
Definition: wtvenc.c:44
char * key
Definition: dict.h:86
static int write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: wtvenc.c:460
void ff_metadata_conv(AVDictionary **pm, const AVMetadataConv *d_conv, const AVMetadataConv *s_conv)
Definition: metadata.c:26
const ff_asf_guid ff_format_videoinfo2
Definition: wtv_common.c:78
const ff_asf_guid ff_wtv_guid
Definition: wtv_common.c:27
int64_t last_serial
Definition: wtvenc.c:106
AVPacket thumbnail
Definition: wtvenc.c:108
static void write_table_entries_events(AVFormatContext *s)
Definition: wtvenc.c:615
#define av_free(p)
int64_t last_chunk_pos
last chunk position
Definition: wtvenc.c:92
char * value
Definition: dict.h:87
int64_t first_index_pos
first index_chunk position
Definition: wtvenc.c:94
int len
void * priv_data
Format private data.
Definition: avformat.h:1347
const ff_asf_guid ff_format_none
Definition: wtv_common.c:45
int64_t serial
Definition: wtvenc.c:78
int nb_sp_pairs
Definition: wtvenc.c:103
#define AV_DICT_IGNORE_SUFFIX
Return first entry in a dictionary whose first part corresponds to the search key, ignoring the suffix of the found key string.
Definition: dict.h:70
static void write_tag_int32(AVIOContext *pb, const char *key, int value)
Definition: wtvenc.c:652
AVCodecParameters * codecpar
Definition: avformat.h:1006
const ff_asf_guid ff_stream1_guid
Definition: wtv_common.c:35
int64_t pos
Definition: wtvenc.c:77
int stream_index
Definition: avcodec.h:1579
static void write_metadata_header(AVIOContext *pb, int type, const char *key, int value_size)
Definition: wtvenc.c:639
const ff_asf_guid * guid
Definition: wtvenc.c:79
This structure stores compressed data.
Definition: avcodec.h:1554
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1570
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition: avutil.h:240