FFmpeg
ape.c
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1 /*
2  * Monkey's Audio APE demuxer
3  * Copyright (c) 2007 Benjamin Zores <ben@geexbox.org>
4  * based upon libdemac from Dave Chapman.
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include <stdio.h>
24 
25 #include "libavutil/intreadwrite.h"
26 #include "avformat.h"
27 #include "internal.h"
28 #include "apetag.h"
29 
30 /* The earliest and latest file formats supported by this library */
31 #define APE_MIN_VERSION 3800
32 #define APE_MAX_VERSION 3990
33 
34 #define MAC_FORMAT_FLAG_8_BIT 1 // is 8-bit [OBSOLETE]
35 #define MAC_FORMAT_FLAG_CRC 2 // uses the new CRC32 error detection [OBSOLETE]
36 #define MAC_FORMAT_FLAG_HAS_PEAK_LEVEL 4 // uint32 nPeakLevel after the header [OBSOLETE]
37 #define MAC_FORMAT_FLAG_24_BIT 8 // is 24-bit [OBSOLETE]
38 #define MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS 16 // has the number of seek elements after the peak level
39 #define MAC_FORMAT_FLAG_CREATE_WAV_HEADER 32 // create the wave header on decompression (not stored)
40 
41 #define APE_EXTRADATA_SIZE 6
42 
43 typedef struct APEFrame {
44  int64_t pos;
45  int64_t size;
46  int nblocks;
47  int skip;
48  int64_t pts;
49 } APEFrame;
50 
51 typedef struct APEContext {
52  /* Derived fields */
53  uint32_t junklength;
54  uint32_t firstframe;
55  uint32_t totalsamples;
56  int currentframe;
57  APEFrame *frames;
58 
59  /* Info from Descriptor Block */
60  int16_t fileversion;
61  int16_t padding1;
62  uint32_t descriptorlength;
63  uint32_t headerlength;
64  uint32_t seektablelength;
65  uint32_t wavheaderlength;
66  uint32_t audiodatalength;
67  uint32_t audiodatalength_high;
68  uint32_t wavtaillength;
69  uint8_t md5[16];
70 
71  /* Info from Header Block */
72  uint16_t compressiontype;
73  uint16_t formatflags;
74  uint32_t blocksperframe;
75  uint32_t finalframeblocks;
76  uint32_t totalframes;
77  uint16_t bps;
78  uint16_t channels;
79  uint32_t samplerate;
80 } APEContext;
81 
82 static int ape_probe(const AVProbeData * p)
83 {
84  int version = AV_RL16(p->buf+4);
85  if (AV_RL32(p->buf) != MKTAG('M', 'A', 'C', ' '))
86  return 0;
87 
88  if (version < APE_MIN_VERSION || version > APE_MAX_VERSION)
89  return AVPROBE_SCORE_MAX/4;
90 
91  return AVPROBE_SCORE_MAX;
92 }
93 
94 static void ape_dumpinfo(AVFormatContext * s, APEContext * ape_ctx)
95 {
96 #ifdef DEBUG
97  int i;
98 
99  av_log(s, AV_LOG_DEBUG, "Descriptor Block:\n\n");
100  av_log(s, AV_LOG_DEBUG, "fileversion = %"PRId16"\n", ape_ctx->fileversion);
101  av_log(s, AV_LOG_DEBUG, "descriptorlength = %"PRIu32"\n", ape_ctx->descriptorlength);
102  av_log(s, AV_LOG_DEBUG, "headerlength = %"PRIu32"\n", ape_ctx->headerlength);
103  av_log(s, AV_LOG_DEBUG, "seektablelength = %"PRIu32"\n", ape_ctx->seektablelength);
104  av_log(s, AV_LOG_DEBUG, "wavheaderlength = %"PRIu32"\n", ape_ctx->wavheaderlength);
105  av_log(s, AV_LOG_DEBUG, "audiodatalength = %"PRIu32"\n", ape_ctx->audiodatalength);
106  av_log(s, AV_LOG_DEBUG, "audiodatalength_high = %"PRIu32"\n", ape_ctx->audiodatalength_high);
107  av_log(s, AV_LOG_DEBUG, "wavtaillength = %"PRIu32"\n", ape_ctx->wavtaillength);
108  av_log(s, AV_LOG_DEBUG, "md5 = ");
109  for (i = 0; i < 16; i++)
110  av_log(s, AV_LOG_DEBUG, "%02x", ape_ctx->md5[i]);
111  av_log(s, AV_LOG_DEBUG, "\n");
112 
113  av_log(s, AV_LOG_DEBUG, "\nHeader Block:\n\n");
114 
115  av_log(s, AV_LOG_DEBUG, "compressiontype = %"PRIu16"\n", ape_ctx->compressiontype);
116  av_log(s, AV_LOG_DEBUG, "formatflags = %"PRIu16"\n", ape_ctx->formatflags);
117  av_log(s, AV_LOG_DEBUG, "blocksperframe = %"PRIu32"\n", ape_ctx->blocksperframe);
118  av_log(s, AV_LOG_DEBUG, "finalframeblocks = %"PRIu32"\n", ape_ctx->finalframeblocks);
119  av_log(s, AV_LOG_DEBUG, "totalframes = %"PRIu32"\n", ape_ctx->totalframes);
120  av_log(s, AV_LOG_DEBUG, "bps = %"PRIu16"\n", ape_ctx->bps);
121  av_log(s, AV_LOG_DEBUG, "channels = %"PRIu16"\n", ape_ctx->channels);
122  av_log(s, AV_LOG_DEBUG, "samplerate = %"PRIu32"\n", ape_ctx->samplerate);
123 
124  av_log(s, AV_LOG_DEBUG, "\nSeektable\n\n");
125  if ((ape_ctx->seektablelength / sizeof(uint32_t)) != ape_ctx->totalframes) {
126  av_log(s, AV_LOG_DEBUG, "No seektable\n");
127  }
128 
129  av_log(s, AV_LOG_DEBUG, "\nFrames\n\n");
130  for (i = 0; i < ape_ctx->totalframes; i++)
131  av_log(s, AV_LOG_DEBUG, "%8d %8"PRId64" %8"PRId64" (%d samples)\n", i,
132  ape_ctx->frames[i].pos, ape_ctx->frames[i].size,
133  ape_ctx->frames[i].nblocks);
134 
135  av_log(s, AV_LOG_DEBUG, "\nCalculated information:\n\n");
136  av_log(s, AV_LOG_DEBUG, "junklength = %"PRIu32"\n", ape_ctx->junklength);
137  av_log(s, AV_LOG_DEBUG, "firstframe = %"PRIu32"\n", ape_ctx->firstframe);
138  av_log(s, AV_LOG_DEBUG, "totalsamples = %"PRIu32"\n", ape_ctx->totalsamples);
139 #endif
140 }
141 
142 static int ape_read_header(AVFormatContext * s)
143 {
144  AVIOContext *pb = s->pb;
145  APEContext *ape = s->priv_data;
146  AVStream *st;
147  uint32_t tag;
148  int i, ret;
149  int64_t total_blocks;
150  int64_t final_size = 0;
151  int64_t pts, file_size;
152 
153  /* Skip any leading junk such as id3v2 tags */
154  ape->junklength = avio_tell(pb);
155 
156  tag = avio_rl32(pb);
157  if (tag != MKTAG('M', 'A', 'C', ' '))
158  return AVERROR_INVALIDDATA;
159 
160  ape->fileversion = avio_rl16(pb);
161 
162  if (ape->fileversion < APE_MIN_VERSION || ape->fileversion > APE_MAX_VERSION) {
163  av_log(s, AV_LOG_ERROR, "Unsupported file version - %d.%02d\n",
164  ape->fileversion / 1000, (ape->fileversion % 1000) / 10);
165  return AVERROR_PATCHWELCOME;
166  }
167 
168  if (ape->fileversion >= 3980) {
169  ape->padding1 = avio_rl16(pb);
170  ape->descriptorlength = avio_rl32(pb);
171  ape->headerlength = avio_rl32(pb);
172  ape->seektablelength = avio_rl32(pb);
173  ape->wavheaderlength = avio_rl32(pb);
174  ape->audiodatalength = avio_rl32(pb);
175  ape->audiodatalength_high = avio_rl32(pb);
176  ape->wavtaillength = avio_rl32(pb);
177  avio_read(pb, ape->md5, 16);
178 
179  /* Skip any unknown bytes at the end of the descriptor.
180  This is for future compatibility */
181  if (ape->descriptorlength > 52)
182  avio_skip(pb, ape->descriptorlength - 52);
183 
184  /* Read header data */
185  ape->compressiontype = avio_rl16(pb);
186  ape->formatflags = avio_rl16(pb);
187  ape->blocksperframe = avio_rl32(pb);
188  ape->finalframeblocks = avio_rl32(pb);
189  ape->totalframes = avio_rl32(pb);
190  ape->bps = avio_rl16(pb);
191  ape->channels = avio_rl16(pb);
192  ape->samplerate = avio_rl32(pb);
193  } else {
194  ape->descriptorlength = 0;
195  ape->headerlength = 32;
196 
197  ape->compressiontype = avio_rl16(pb);
198  ape->formatflags = avio_rl16(pb);
199  ape->channels = avio_rl16(pb);
200  ape->samplerate = avio_rl32(pb);
201  ape->wavheaderlength = avio_rl32(pb);
202  ape->wavtaillength = avio_rl32(pb);
203  ape->totalframes = avio_rl32(pb);
204  ape->finalframeblocks = avio_rl32(pb);
205 
206  if (ape->formatflags & MAC_FORMAT_FLAG_HAS_PEAK_LEVEL) {
207  avio_skip(pb, 4); /* Skip the peak level */
208  ape->headerlength += 4;
209  }
210 
211  if (ape->formatflags & MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS) {
212  ape->seektablelength = avio_rl32(pb);
213  ape->headerlength += 4;
214  ape->seektablelength *= sizeof(int32_t);
215  } else
216  ape->seektablelength = ape->totalframes * sizeof(int32_t);
217 
218  if (ape->formatflags & MAC_FORMAT_FLAG_8_BIT)
219  ape->bps = 8;
220  else if (ape->formatflags & MAC_FORMAT_FLAG_24_BIT)
221  ape->bps = 24;
222  else
223  ape->bps = 16;
224 
225  if (ape->fileversion >= 3950)
226  ape->blocksperframe = 73728 * 4;
227  else if (ape->fileversion >= 3900 || (ape->fileversion >= 3800 && ape->compressiontype >= 4000))
228  ape->blocksperframe = 73728;
229  else
230  ape->blocksperframe = 9216;
231 
232  /* Skip any stored wav header */
233  if (!(ape->formatflags & MAC_FORMAT_FLAG_CREATE_WAV_HEADER))
234  avio_skip(pb, ape->wavheaderlength);
235  }
236 
237  if(!ape->totalframes || pb->eof_reached){
238  av_log(s, AV_LOG_ERROR, "No frames in the file!\n");
239  return AVERROR(EINVAL);
240  }
241  if(ape->totalframes > UINT_MAX / sizeof(APEFrame)){
242  av_log(s, AV_LOG_ERROR, "Too many frames: %"PRIu32"\n",
243  ape->totalframes);
244  return AVERROR_INVALIDDATA;
245  }
246  if (ape->seektablelength / sizeof(uint32_t) < ape->totalframes) {
247  av_log(s, AV_LOG_ERROR,
248  "Number of seek entries is less than number of frames: %"SIZE_SPECIFIER" vs. %"PRIu32"\n",
249  ape->seektablelength / sizeof(uint32_t), ape->totalframes);
250  return AVERROR_INVALIDDATA;
251  }
252  ape->frames = av_malloc_array(ape->totalframes, sizeof(APEFrame));
253  if(!ape->frames)
254  return AVERROR(ENOMEM);
255  ape->firstframe = ape->junklength + ape->descriptorlength + ape->headerlength + ape->seektablelength + ape->wavheaderlength;
256  if (ape->fileversion < 3810)
257  ape->firstframe += ape->totalframes;
258  ape->currentframe = 0;
259 
260 
261  ape->totalsamples = ape->finalframeblocks;
262  if (ape->totalframes > 1)
263  ape->totalsamples += ape->blocksperframe * (ape->totalframes - 1);
264 
265  ape->frames[0].pos = ape->firstframe;
266  ape->frames[0].nblocks = ape->blocksperframe;
267  ape->frames[0].skip = 0;
268  avio_rl32(pb); // seektable[0]
269  for (i = 1; i < ape->totalframes; i++) {
270  uint32_t seektable_entry = avio_rl32(pb);
271  ape->frames[i].pos = seektable_entry + ape->junklength;
272  ape->frames[i].nblocks = ape->blocksperframe;
273  ape->frames[i - 1].size = ape->frames[i].pos - ape->frames[i - 1].pos;
274  ape->frames[i].skip = (ape->frames[i].pos - ape->frames[0].pos) & 3;
275 
276  if (pb->eof_reached) {
277  av_log(s, AV_LOG_ERROR, "seektable truncated\n");
278  return AVERROR_INVALIDDATA;
279  }
280  ff_dlog(s, "seektable: %8d %"PRIu32"\n", i, seektable_entry);
281  }
282  avio_skip(pb, ape->seektablelength / sizeof(uint32_t) - ape->totalframes);
283 
284  ape->frames[ape->totalframes - 1].nblocks = ape->finalframeblocks;
285  /* calculate final packet size from total file size, if available */
286  file_size = avio_size(pb);
287  if (file_size > 0) {
288  final_size = file_size - ape->frames[ape->totalframes - 1].pos -
289  ape->wavtaillength;
290  final_size -= final_size & 3;
291  }
292  if (file_size <= 0 || final_size <= 0)
293  final_size = ape->finalframeblocks * 8;
294  ape->frames[ape->totalframes - 1].size = final_size;
295 
296  for (i = 0; i < ape->totalframes; i++) {
297  if(ape->frames[i].skip){
298  ape->frames[i].pos -= ape->frames[i].skip;
299  ape->frames[i].size += ape->frames[i].skip;
300  }
301  if (ape->frames[i].size > INT_MAX - 3)
302  return AVERROR_INVALIDDATA;
303  ape->frames[i].size = (ape->frames[i].size + 3) & ~3;
304  }
305  if (ape->fileversion < 3810) {
306  for (i = 0; i < ape->totalframes; i++) {
307  int bits = avio_r8(pb);
308  if (i && bits)
309  ape->frames[i - 1].size += 4;
310 
311  ape->frames[i].skip <<= 3;
312  ape->frames[i].skip += bits;
313  ff_dlog(s, "bittable: %2d\n", bits);
314  if (pb->eof_reached) {
315  av_log(s, AV_LOG_ERROR, "bittable truncated\n");
316  return AVERROR_INVALIDDATA;
317  }
318  }
319  }
320 
321  ape_dumpinfo(s, ape);
322 
323  av_log(s, AV_LOG_VERBOSE, "Decoding file - v%d.%02d, compression level %"PRIu16"\n",
324  ape->fileversion / 1000, (ape->fileversion % 1000) / 10,
325  ape->compressiontype);
326 
327  /* now we are ready: build format streams */
328  st = avformat_new_stream(s, NULL);
329  if (!st)
330  return AVERROR(ENOMEM);
331 
332  total_blocks = (ape->totalframes == 0) ? 0 : ((int64_t)(ape->totalframes - 1) * ape->blocksperframe) + ape->finalframeblocks;
333 
334  st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
335  st->codecpar->codec_id = AV_CODEC_ID_APE;
336  st->codecpar->codec_tag = MKTAG('A', 'P', 'E', ' ');
337  st->codecpar->ch_layout.nb_channels = ape->channels;
338  st->codecpar->sample_rate = ape->samplerate;
339  st->codecpar->bits_per_coded_sample = ape->bps;
340 
341  st->nb_frames = ape->totalframes;
342  st->start_time = 0;
343  st->duration = total_blocks;
344  avpriv_set_pts_info(st, 64, 1, ape->samplerate);
345 
346  if ((ret = ff_alloc_extradata(st->codecpar, APE_EXTRADATA_SIZE)) < 0)
347  return ret;
348  AV_WL16(st->codecpar->extradata + 0, ape->fileversion);
349  AV_WL16(st->codecpar->extradata + 2, ape->compressiontype);
350  AV_WL16(st->codecpar->extradata + 4, ape->formatflags);
351 
352  pts = 0;
353  for (i = 0; i < ape->totalframes; i++) {
354  ape->frames[i].pts = pts;
355  av_add_index_entry(st, ape->frames[i].pos, ape->frames[i].pts, 0, 0, AVINDEX_KEYFRAME);
356  pts += ape->blocksperframe;
357  }
358 
359  /* try to read APE tags */
360  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
361  ff_ape_parse_tag(s);
362  avio_seek(pb, 0, SEEK_SET);
363  }
364 
365  return 0;
366 }
367 
368 static int ape_read_packet(AVFormatContext * s, AVPacket * pkt)
369 {
370  int ret;
371  int nblocks;
372  APEContext *ape = s->priv_data;
373  uint32_t extra_size = 8;
374  int64_t ret64;
375 
376  if (avio_feof(s->pb))
377  return AVERROR_EOF;
378  if (ape->currentframe >= ape->totalframes)
379  return AVERROR_EOF;
380 
381  ret64 = avio_seek(s->pb, ape->frames[ape->currentframe].pos, SEEK_SET);
382  if (ret64 < 0)
383  return ret64;
384 
385  /* Calculate how many blocks there are in this frame */
386  if (ape->currentframe == (ape->totalframes - 1))
387  nblocks = ape->finalframeblocks;
388  else
389  nblocks = ape->blocksperframe;
390 
391  if (ape->frames[ape->currentframe].size <= 0 ||
392  ape->frames[ape->currentframe].size > INT_MAX - extra_size) {
393  av_log(s, AV_LOG_ERROR, "invalid packet size: %8"PRId64"\n",
394  ape->frames[ape->currentframe].size);
395  ape->currentframe++;
396  return AVERROR(EIO);
397  }
398 
399  ret = av_new_packet(pkt, ape->frames[ape->currentframe].size + extra_size);
400  if (ret < 0)
401  return ret;
402 
403  AV_WL32(pkt->data , nblocks);
404  AV_WL32(pkt->data + 4, ape->frames[ape->currentframe].skip);
405  ret = avio_read(s->pb, pkt->data + extra_size, ape->frames[ape->currentframe].size);
406  if (ret < 0) {
407  return ret;
408  }
409 
410  pkt->pts = ape->frames[ape->currentframe].pts;
411  pkt->stream_index = 0;
412 
413  /* note: we need to modify the packet size here to handle the last
414  packet */
415  pkt->size = ret + extra_size;
416  pkt->duration = nblocks;
417 
418  ape->currentframe++;
419 
420  return 0;
421 }
422 
423 static int ape_read_close(AVFormatContext * s)
424 {
425  APEContext *ape = s->priv_data;
426 
427  av_freep(&ape->frames);
428  return 0;
429 }
430 
431 static int ape_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
432 {
433  AVStream *st = s->streams[stream_index];
434  APEContext *ape = s->priv_data;
435  int index = av_index_search_timestamp(st, timestamp, flags);
436  int64_t ret;
437 
438  if (index < 0)
439  return -1;
440 
441  if ((ret = avio_seek(s->pb, ffstream(st)->index_entries[index].pos, SEEK_SET)) < 0)
442  return ret;
443  ape->currentframe = index;
444  return 0;
445 }
446 
447 const AVInputFormat ff_ape_demuxer = {
448  .name = "ape",
449  .long_name = NULL_IF_CONFIG_SMALL("Monkey's Audio"),
450  .priv_data_size = sizeof(APEContext),
451  .flags_internal = FF_FMT_INIT_CLEANUP,
452  .read_probe = ape_probe,
453  .read_header = ape_read_header,
454  .read_packet = ape_read_packet,
455  .read_close = ape_read_close,
456  .read_seek = ape_read_seek,
457  .extensions = "ape,apl,mac",
458 };
MAC_FORMAT_FLAG_CREATE_WAV_HEADER
#define MAC_FORMAT_FLAG_CREATE_WAV_HEADER
Definition: ape.c:39
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:76
MAC_FORMAT_FLAG_HAS_PEAK_LEVEL
#define MAC_FORMAT_FLAG_HAS_PEAK_LEVEL
Definition: ape.c:36
FF_FMT_INIT_CLEANUP
#define FF_FMT_INIT_CLEANUP
For an AVInputFormat with this flag set read_close() needs to be called by the caller upon read_heade...
Definition: internal.h:47
APEContext::wavheaderlength
uint32_t wavheaderlength
Definition: ape.c:65
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: options.c:237
AV_CODEC_ID_APE
@ AV_CODEC_ID_APE
Definition: codec_id.h:470
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:58
AV_WL32
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
APEContext::finalframeblocks
uint32_t finalframeblocks
Definition: ape.c:75
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
APEFrame::skip
int skip
Definition: ape.c:47
APEContext::totalsamples
uint32_t totalsamples
Definition: ape.c:55
apetag.h
AVPacket::data
uint8_t * data
Definition: packet.h:374
APEContext::fileversion
int16_t fileversion
Definition: ape.c:60
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:196
MAC_FORMAT_FLAG_8_BIT
#define MAC_FORMAT_FLAG_8_BIT
Definition: ape.c:34
ape_probe
static int ape_probe(const AVProbeData *p)
Definition: ape.c:82
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:392
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:66
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:311
avio_size
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:354
ff_ape_parse_tag
int64_t ff_ape_parse_tag(AVFormatContext *s)
Read and parse an APE tag.
Definition: apetag.c:109
APEContext::audiodatalength
uint32_t audiodatalength
Definition: ape.c:66
AVINDEX_KEYFRAME
#define AVINDEX_KEYFRAME
Definition: avformat.h:815
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:465
APEContext::firstframe
uint32_t firstframe
Definition: ape.c:54
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *st, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: avformat.c:763
ffstream
static av_always_inline FFStream * ffstream(AVStream *st)
Definition: internal.h:413
APEContext::fileversion
int fileversion
codec version, very important in decoding process
Definition: apedec.c:162
read_seek
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:151
av_add_index_entry
int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp, int size, int distance, int flags)
Add an index entry into a sorted list.
Definition: seek.c:120
read_close
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:143
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:510
pts
static int64_t pts
Definition: transcode_aac.c:654
APEContext::blocksperframe
uint32_t blocksperframe
Definition: ape.c:74
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:998
APEContext::compressiontype
uint16_t compressiontype
Definition: ape.c:72
avio_rl16
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:745
pkt
AVPacket * pkt
Definition: movenc.c:59
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
AVInputFormat
Definition: avformat.h:656
ff_ape_demuxer
const AVInputFormat ff_ape_demuxer
Definition: ape.c:447
APEContext::audiodatalength_high
uint32_t audiodatalength_high
Definition: ape.c:67
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:256
av_new_packet
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:97
APEContext::junklength
uint32_t junklength
Definition: ape.c:53
ape_dumpinfo
static void ape_dumpinfo(AVFormatContext *s, APEContext *ape_ctx)
Definition: ape.c:94
APEContext::currentframe
int currentframe
Definition: ape.c:56
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:661
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:455
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
bits
uint8_t bits
Definition: vp3data.h:128
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
AV_RL16
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:94
MAC_FORMAT_FLAG_24_BIT
#define MAC_FORMAT_FLAG_24_BIT
Definition: ape.c:37
if
if(ret)
Definition: filter_design.txt:179
AVFormatContext
Format I/O context.
Definition: avformat.h:1216
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1108
APEContext::formatflags
uint16_t formatflags
Definition: ape.c:73
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:540
NULL
#define NULL
Definition: coverity.c:32
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:64
read_probe
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:453
APEContext::md5
uint8_t md5[16]
Definition: ape.c:69
APEContext
Decoder context.
Definition: apedec.c:153
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
Audio only.
Definition: codec_par.h:213
APEContext::wavtaillength
uint32_t wavtaillength
Definition: ape.c:68
APEFrame::nblocks
int nblocks
Definition: ape.c:46
index
int index
Definition: gxfenc.c:89
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:178
AVStream::nb_frames
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:1000
ff_dlog
#define ff_dlog(a,...)
Definition: tableprint_vlc.h:28
avio_rl32
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:761
AVIOContext
Bytestream IO Context.
Definition: avio.h:166
AVPacket::size
int size
Definition: packet.h:375
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:115
AVIOContext::seekable
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:267
APE_EXTRADATA_SIZE
#define APE_EXTRADATA_SIZE
Definition: ape.c:41
AV_WL16
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
APEContext::channels
uint16_t channels
Definition: ape.c:78
avio_r8
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:634
ape_read_header
static int ape_read_header(AVFormatContext *s)
Definition: ape.c:142
version
version
Definition: libkvazaar.c:313
APE_MIN_VERSION
#define APE_MIN_VERSION
Definition: ape.c:31
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:367
APEContext::totalframes
uint32_t totalframes
Definition: ape.c:76
av_malloc_array
#define av_malloc_array(a, b)
Definition: tableprint_vlc.h:31
APEContext::bps
uint16_t bps
Definition: ape.c:77
APEFrame
Definition: ape.c:43
ape_read_packet
static int ape_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: ape.c:368
tag
uint32_t tag
Definition: movenc.c:1647
ret
ret
Definition: filter_design.txt:187
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
AVStream
Stream structure.
Definition: avformat.h:948
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:262
APEContext::samplerate
uint32_t samplerate
Definition: ape.c:79
APE_MAX_VERSION
#define APE_MAX_VERSION
Definition: ape.c:32
APEFrame::size
int64_t size
Definition: ape.c:45
pos
unsigned int pos
Definition: spdifenc.c:412
avformat.h
ape_read_close
static int ape_read_close(AVFormatContext *s)
Definition: ape.c:423
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:92
SIZE_SPECIFIER
#define SIZE_SPECIFIER
Definition: internal.h:150
APEFrame::pts
int64_t pts
Definition: ape.c:48
AVIO_SEEKABLE_NORMAL
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:41
APEContext::channels
int channels
Definition: apedec.c:158
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:643
AVIOContext::eof_reached
int eof_reached
true if was unable to read due to error or eof
Definition: avio.h:244
AVPacket::stream_index
int stream_index
Definition: packet.h:376
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:349
APEContext::headerlength
uint32_t headerlength
Definition: ape.c:63
MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS
#define MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS
Definition: ape.c:38
APEFrame::pos
int64_t pos
Definition: ape.c:44
AVCodecParameters::bits_per_coded_sample
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:104
APEContext::bps
int bps
Definition: apedec.c:160
ape_read_seek
static int ape_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: ape.c:431
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:62
AVPacket
This structure stores compressed data.
Definition: packet.h:351
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
int32_t
int32_t
Definition: audioconvert.c:56
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
MKTAG
#define MKTAG(a, b, c, d)
Definition: macros.h:55
AVStream::start_time
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base.
Definition: avformat.h:988
APEContext::padding1
int16_t padding1
Definition: ape.c:61
APEContext::seektablelength
uint32_t seektablelength
Definition: ape.c:64
APEContext::descriptorlength
uint32_t descriptorlength
Definition: ape.c:62
av_index_search_timestamp
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags)
Get the index for a specific timestamp.
Definition: seek.c:240
ff_alloc_extradata
int ff_alloc_extradata(AVCodecParameters *par, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0.
Definition: utils.c:238
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:377
APEContext::frames
APEFrame * frames
Definition: ape.c:57
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