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 "demux.h"
28 #include "internal.h"
29 #include "apetag.h"
30 
31 /* The earliest and latest file formats supported by this library */
32 #define APE_MIN_VERSION 3800
33 #define APE_MAX_VERSION 3990
34 
35 #define MAC_FORMAT_FLAG_8_BIT 1 // is 8-bit [OBSOLETE]
36 #define MAC_FORMAT_FLAG_CRC 2 // uses the new CRC32 error detection [OBSOLETE]
37 #define MAC_FORMAT_FLAG_HAS_PEAK_LEVEL 4 // uint32 nPeakLevel after the header [OBSOLETE]
38 #define MAC_FORMAT_FLAG_24_BIT 8 // is 24-bit [OBSOLETE]
39 #define MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS 16 // has the number of seek elements after the peak level
40 #define MAC_FORMAT_FLAG_CREATE_WAV_HEADER 32 // create the wave header on decompression (not stored)
41 
42 #define APE_EXTRADATA_SIZE 6
43 
44 typedef struct APEFrame {
45  int64_t pos;
46  int64_t size;
47  int nblocks;
48  int skip;
49  int64_t pts;
50 } APEFrame;
51 
52 typedef struct APEContext {
53  /* Derived fields */
54  uint32_t junklength;
55  uint32_t firstframe;
56  uint32_t totalsamples;
57  int currentframe;
58  APEFrame *frames;
59 
60  /* Info from Descriptor Block */
61  int16_t fileversion;
62  int16_t padding1;
63  uint32_t descriptorlength;
64  uint32_t headerlength;
65  uint32_t seektablelength;
66  uint32_t wavheaderlength;
67  uint32_t audiodatalength;
68  uint32_t audiodatalength_high;
69  uint32_t wavtaillength;
70  uint8_t md5[16];
71 
72  /* Info from Header Block */
73  uint16_t compressiontype;
74  uint16_t formatflags;
75  uint32_t blocksperframe;
76  uint32_t finalframeblocks;
77  uint32_t totalframes;
78  uint16_t bps;
79  uint16_t channels;
80  uint32_t samplerate;
81 } APEContext;
82 
83 static int ape_probe(const AVProbeData * p)
84 {
85  int version = AV_RL16(p->buf+4);
86  if (AV_RL32(p->buf) != MKTAG('M', 'A', 'C', ' '))
87  return 0;
88 
89  if (version < APE_MIN_VERSION || version > APE_MAX_VERSION)
90  return AVPROBE_SCORE_MAX/4;
91 
92  return AVPROBE_SCORE_MAX;
93 }
94 
95 static void ape_dumpinfo(AVFormatContext * s, APEContext * ape_ctx)
96 {
97 #ifdef DEBUG
98  int i;
99 
100  av_log(s, AV_LOG_DEBUG, "Descriptor Block:\n\n");
101  av_log(s, AV_LOG_DEBUG, "fileversion = %"PRId16"\n", ape_ctx->fileversion);
102  av_log(s, AV_LOG_DEBUG, "descriptorlength = %"PRIu32"\n", ape_ctx->descriptorlength);
103  av_log(s, AV_LOG_DEBUG, "headerlength = %"PRIu32"\n", ape_ctx->headerlength);
104  av_log(s, AV_LOG_DEBUG, "seektablelength = %"PRIu32"\n", ape_ctx->seektablelength);
105  av_log(s, AV_LOG_DEBUG, "wavheaderlength = %"PRIu32"\n", ape_ctx->wavheaderlength);
106  av_log(s, AV_LOG_DEBUG, "audiodatalength = %"PRIu32"\n", ape_ctx->audiodatalength);
107  av_log(s, AV_LOG_DEBUG, "audiodatalength_high = %"PRIu32"\n", ape_ctx->audiodatalength_high);
108  av_log(s, AV_LOG_DEBUG, "wavtaillength = %"PRIu32"\n", ape_ctx->wavtaillength);
109  av_log(s, AV_LOG_DEBUG, "md5 = ");
110  for (i = 0; i < 16; i++)
111  av_log(s, AV_LOG_DEBUG, "%02x", ape_ctx->md5[i]);
112  av_log(s, AV_LOG_DEBUG, "\n");
113 
114  av_log(s, AV_LOG_DEBUG, "\nHeader Block:\n\n");
115 
116  av_log(s, AV_LOG_DEBUG, "compressiontype = %"PRIu16"\n", ape_ctx->compressiontype);
117  av_log(s, AV_LOG_DEBUG, "formatflags = %"PRIu16"\n", ape_ctx->formatflags);
118  av_log(s, AV_LOG_DEBUG, "blocksperframe = %"PRIu32"\n", ape_ctx->blocksperframe);
119  av_log(s, AV_LOG_DEBUG, "finalframeblocks = %"PRIu32"\n", ape_ctx->finalframeblocks);
120  av_log(s, AV_LOG_DEBUG, "totalframes = %"PRIu32"\n", ape_ctx->totalframes);
121  av_log(s, AV_LOG_DEBUG, "bps = %"PRIu16"\n", ape_ctx->bps);
122  av_log(s, AV_LOG_DEBUG, "channels = %"PRIu16"\n", ape_ctx->channels);
123  av_log(s, AV_LOG_DEBUG, "samplerate = %"PRIu32"\n", ape_ctx->samplerate);
124 
125  av_log(s, AV_LOG_DEBUG, "\nSeektable\n\n");
126  if ((ape_ctx->seektablelength / sizeof(uint32_t)) != ape_ctx->totalframes) {
127  av_log(s, AV_LOG_DEBUG, "No seektable\n");
128  }
129 
130  av_log(s, AV_LOG_DEBUG, "\nFrames\n\n");
131  for (i = 0; i < ape_ctx->totalframes; i++)
132  av_log(s, AV_LOG_DEBUG, "%8d %8"PRId64" %8"PRId64" (%d samples)\n", i,
133  ape_ctx->frames[i].pos, ape_ctx->frames[i].size,
134  ape_ctx->frames[i].nblocks);
135 
136  av_log(s, AV_LOG_DEBUG, "\nCalculated information:\n\n");
137  av_log(s, AV_LOG_DEBUG, "junklength = %"PRIu32"\n", ape_ctx->junklength);
138  av_log(s, AV_LOG_DEBUG, "firstframe = %"PRIu32"\n", ape_ctx->firstframe);
139  av_log(s, AV_LOG_DEBUG, "totalsamples = %"PRIu32"\n", ape_ctx->totalsamples);
140 #endif
141 }
142 
143 static int ape_read_header(AVFormatContext * s)
144 {
145  AVIOContext *pb = s->pb;
146  APEContext *ape = s->priv_data;
147  AVStream *st;
148  uint32_t tag;
149  int i, ret;
150  int64_t total_blocks;
151  int64_t final_size = 0;
152  int64_t pts, file_size;
153 
154  /* Skip any leading junk such as id3v2 tags */
155  ape->junklength = avio_tell(pb);
156 
157  tag = avio_rl32(pb);
158  if (tag != MKTAG('M', 'A', 'C', ' '))
159  return AVERROR_INVALIDDATA;
160 
161  ape->fileversion = avio_rl16(pb);
162 
163  if (ape->fileversion < APE_MIN_VERSION || ape->fileversion > APE_MAX_VERSION) {
164  av_log(s, AV_LOG_ERROR, "Unsupported file version - %d.%02d\n",
165  ape->fileversion / 1000, (ape->fileversion % 1000) / 10);
166  return AVERROR_PATCHWELCOME;
167  }
168 
169  if (ape->fileversion >= 3980) {
170  ape->padding1 = avio_rl16(pb);
171  ape->descriptorlength = avio_rl32(pb);
172  ape->headerlength = avio_rl32(pb);
173  ape->seektablelength = avio_rl32(pb);
174  ape->wavheaderlength = avio_rl32(pb);
175  ape->audiodatalength = avio_rl32(pb);
176  ape->audiodatalength_high = avio_rl32(pb);
177  ape->wavtaillength = avio_rl32(pb);
178  avio_read(pb, ape->md5, 16);
179 
180  /* Skip any unknown bytes at the end of the descriptor.
181  This is for future compatibility */
182  if (ape->descriptorlength > 52)
183  avio_skip(pb, ape->descriptorlength - 52);
184 
185  /* Read header data */
186  ape->compressiontype = avio_rl16(pb);
187  ape->formatflags = avio_rl16(pb);
188  ape->blocksperframe = avio_rl32(pb);
189  ape->finalframeblocks = avio_rl32(pb);
190  ape->totalframes = avio_rl32(pb);
191  ape->bps = avio_rl16(pb);
192  ape->channels = avio_rl16(pb);
193  ape->samplerate = avio_rl32(pb);
194  } else {
195  ape->descriptorlength = 0;
196  ape->headerlength = 32;
197 
198  ape->compressiontype = avio_rl16(pb);
199  ape->formatflags = avio_rl16(pb);
200  ape->channels = avio_rl16(pb);
201  ape->samplerate = avio_rl32(pb);
202  ape->wavheaderlength = avio_rl32(pb);
203  ape->wavtaillength = avio_rl32(pb);
204  ape->totalframes = avio_rl32(pb);
205  ape->finalframeblocks = avio_rl32(pb);
206 
207  if (ape->formatflags & MAC_FORMAT_FLAG_HAS_PEAK_LEVEL) {
208  avio_skip(pb, 4); /* Skip the peak level */
209  ape->headerlength += 4;
210  }
211 
212  if (ape->formatflags & MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS) {
213  ape->seektablelength = avio_rl32(pb);
214  ape->headerlength += 4;
215  ape->seektablelength *= sizeof(int32_t);
216  } else
217  ape->seektablelength = ape->totalframes * sizeof(int32_t);
218 
219  if (ape->formatflags & MAC_FORMAT_FLAG_8_BIT)
220  ape->bps = 8;
221  else if (ape->formatflags & MAC_FORMAT_FLAG_24_BIT)
222  ape->bps = 24;
223  else
224  ape->bps = 16;
225 
226  if (ape->fileversion >= 3950)
227  ape->blocksperframe = 73728 * 4;
228  else if (ape->fileversion >= 3900 || (ape->fileversion >= 3800 && ape->compressiontype >= 4000))
229  ape->blocksperframe = 73728;
230  else
231  ape->blocksperframe = 9216;
232 
233  /* Skip any stored wav header */
234  if (!(ape->formatflags & MAC_FORMAT_FLAG_CREATE_WAV_HEADER))
235  avio_skip(pb, ape->wavheaderlength);
236  }
237 
238  if(!ape->totalframes || pb->eof_reached){
239  av_log(s, AV_LOG_ERROR, "No frames in the file!\n");
240  return AVERROR(EINVAL);
241  }
242  if(ape->totalframes > UINT_MAX / sizeof(APEFrame)){
243  av_log(s, AV_LOG_ERROR, "Too many frames: %"PRIu32"\n",
244  ape->totalframes);
245  return AVERROR_INVALIDDATA;
246  }
247  if (ape->seektablelength / sizeof(uint32_t) < ape->totalframes) {
248  av_log(s, AV_LOG_ERROR,
249  "Number of seek entries is less than number of frames: %"SIZE_SPECIFIER" vs. %"PRIu32"\n",
250  ape->seektablelength / sizeof(uint32_t), ape->totalframes);
251  return AVERROR_INVALIDDATA;
252  }
253  ape->frames = av_malloc_array(ape->totalframes, sizeof(APEFrame));
254  if(!ape->frames)
255  return AVERROR(ENOMEM);
256  ape->firstframe = ape->junklength + ape->descriptorlength + ape->headerlength + ape->seektablelength + ape->wavheaderlength;
257  if (ape->fileversion < 3810)
258  ape->firstframe += ape->totalframes;
259  ape->currentframe = 0;
260 
261 
262  ape->totalsamples = ape->finalframeblocks;
263  if (ape->totalframes > 1)
264  ape->totalsamples += ape->blocksperframe * (ape->totalframes - 1);
265 
266  ape->frames[0].pos = ape->firstframe;
267  ape->frames[0].nblocks = ape->blocksperframe;
268  ape->frames[0].skip = 0;
269  avio_rl32(pb); // seektable[0]
270  for (i = 1; i < ape->totalframes; i++) {
271  uint32_t seektable_entry = avio_rl32(pb);
272  ape->frames[i].pos = seektable_entry + ape->junklength;
273  ape->frames[i].nblocks = ape->blocksperframe;
274  ape->frames[i - 1].size = ape->frames[i].pos - ape->frames[i - 1].pos;
275  ape->frames[i].skip = (ape->frames[i].pos - ape->frames[0].pos) & 3;
276 
277  if (pb->eof_reached) {
278  av_log(s, AV_LOG_ERROR, "seektable truncated\n");
279  return AVERROR_INVALIDDATA;
280  }
281  ff_dlog(s, "seektable: %8d %"PRIu32"\n", i, seektable_entry);
282  }
283  avio_skip(pb, ape->seektablelength / sizeof(uint32_t) - ape->totalframes);
284 
285  ape->frames[ape->totalframes - 1].nblocks = ape->finalframeblocks;
286  /* calculate final packet size from total file size, if available */
287  file_size = avio_size(pb);
288  if (file_size > 0) {
289  final_size = file_size - ape->frames[ape->totalframes - 1].pos -
290  ape->wavtaillength;
291  final_size -= final_size & 3;
292  }
293  if (file_size <= 0 || final_size <= 0)
294  final_size = ape->finalframeblocks * 8LL;
295  ape->frames[ape->totalframes - 1].size = final_size;
296 
297  for (i = 0; i < ape->totalframes; i++) {
298  if(ape->frames[i].skip){
299  ape->frames[i].pos -= ape->frames[i].skip;
300  ape->frames[i].size += ape->frames[i].skip;
301  }
302  if (ape->frames[i].size > INT_MAX - 3)
303  return AVERROR_INVALIDDATA;
304  ape->frames[i].size = (ape->frames[i].size + 3) & ~3;
305  }
306  if (ape->fileversion < 3810) {
307  for (i = 0; i < ape->totalframes; i++) {
308  int bits = avio_r8(pb);
309  if (i && bits)
310  ape->frames[i - 1].size += 4;
311 
312  ape->frames[i].skip <<= 3;
313  ape->frames[i].skip += bits;
314  ff_dlog(s, "bittable: %2d\n", bits);
315  if (pb->eof_reached) {
316  av_log(s, AV_LOG_ERROR, "bittable truncated\n");
317  return AVERROR_INVALIDDATA;
318  }
319  }
320  }
321 
322  ape_dumpinfo(s, ape);
323 
324  av_log(s, AV_LOG_VERBOSE, "Decoding file - v%d.%02d, compression level %"PRIu16"\n",
325  ape->fileversion / 1000, (ape->fileversion % 1000) / 10,
326  ape->compressiontype);
327 
328  /* now we are ready: build format streams */
329  st = avformat_new_stream(s, NULL);
330  if (!st)
331  return AVERROR(ENOMEM);
332 
333  total_blocks = (ape->totalframes == 0) ? 0 : ((int64_t)(ape->totalframes - 1) * ape->blocksperframe) + ape->finalframeblocks;
334 
335  st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
336  st->codecpar->codec_id = AV_CODEC_ID_APE;
337  st->codecpar->codec_tag = MKTAG('A', 'P', 'E', ' ');
338  st->codecpar->ch_layout.nb_channels = ape->channels;
339  st->codecpar->sample_rate = ape->samplerate;
340  st->codecpar->bits_per_coded_sample = ape->bps;
341 
342  st->nb_frames = ape->totalframes;
343  st->start_time = 0;
344  st->duration = total_blocks;
345  avpriv_set_pts_info(st, 64, 1, ape->samplerate);
346 
347  if ((ret = ff_alloc_extradata(st->codecpar, APE_EXTRADATA_SIZE)) < 0)
348  return ret;
349  AV_WL16(st->codecpar->extradata + 0, ape->fileversion);
350  AV_WL16(st->codecpar->extradata + 2, ape->compressiontype);
351  AV_WL16(st->codecpar->extradata + 4, ape->formatflags);
352 
353  pts = 0;
354  for (i = 0; i < ape->totalframes; i++) {
355  ape->frames[i].pts = pts;
356  av_add_index_entry(st, ape->frames[i].pos, ape->frames[i].pts, 0, 0, AVINDEX_KEYFRAME);
357  pts += ape->blocksperframe;
358  }
359 
360  /* try to read APE tags */
361  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
362  ff_ape_parse_tag(s);
363  avio_seek(pb, 0, SEEK_SET);
364  }
365 
366  return 0;
367 }
368 
369 static int ape_read_packet(AVFormatContext * s, AVPacket * pkt)
370 {
371  int ret;
372  int nblocks;
373  APEContext *ape = s->priv_data;
374  uint32_t extra_size = 8;
375  int64_t ret64;
376 
377  if (avio_feof(s->pb))
378  return AVERROR_EOF;
379  if (ape->currentframe >= ape->totalframes)
380  return AVERROR_EOF;
381 
382  ret64 = avio_seek(s->pb, ape->frames[ape->currentframe].pos, SEEK_SET);
383  if (ret64 < 0)
384  return ret64;
385 
386  /* Calculate how many blocks there are in this frame */
387  if (ape->currentframe == (ape->totalframes - 1))
388  nblocks = ape->finalframeblocks;
389  else
390  nblocks = ape->blocksperframe;
391 
392  if (ape->frames[ape->currentframe].size <= 0 ||
393  ape->frames[ape->currentframe].size > INT_MAX - extra_size) {
394  av_log(s, AV_LOG_ERROR, "invalid packet size: %8"PRId64"\n",
395  ape->frames[ape->currentframe].size);
396  ape->currentframe++;
397  return AVERROR(EIO);
398  }
399 
400  ret = av_new_packet(pkt, ape->frames[ape->currentframe].size + extra_size);
401  if (ret < 0)
402  return ret;
403 
404  AV_WL32(pkt->data , nblocks);
405  AV_WL32(pkt->data + 4, ape->frames[ape->currentframe].skip);
406  ret = avio_read(s->pb, pkt->data + extra_size, ape->frames[ape->currentframe].size);
407  if (ret < 0) {
408  return ret;
409  }
410 
411  pkt->pts = ape->frames[ape->currentframe].pts;
412  pkt->stream_index = 0;
413 
414  /* note: we need to modify the packet size here to handle the last
415  packet */
416  pkt->size = ret + extra_size;
417  pkt->duration = nblocks;
418 
419  ape->currentframe++;
420 
421  return 0;
422 }
423 
424 static int ape_read_close(AVFormatContext * s)
425 {
426  APEContext *ape = s->priv_data;
427 
428  av_freep(&ape->frames);
429  return 0;
430 }
431 
432 static int ape_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
433 {
434  AVStream *st = s->streams[stream_index];
435  APEContext *ape = s->priv_data;
436  int index = av_index_search_timestamp(st, timestamp, flags);
437  int64_t ret;
438 
439  if (index < 0)
440  return -1;
441 
442  if ((ret = avio_seek(s->pb, ffstream(st)->index_entries[index].pos, SEEK_SET)) < 0)
443  return ret;
444  ape->currentframe = index;
445  return 0;
446 }
447 
448 const FFInputFormat ff_ape_demuxer = {
449  .p.name = "ape",
450  .p.long_name = NULL_IF_CONFIG_SMALL("Monkey's Audio"),
451  .p.extensions = "ape,apl,mac",
452  .priv_data_size = sizeof(APEContext),
453  .flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
454  .read_probe = ape_probe,
455  .read_header = ape_read_header,
456  .read_packet = ape_read_packet,
457  .read_close = ape_read_close,
458  .read_seek = ape_read_seek,
459 };
MAC_FORMAT_FLAG_CREATE_WAV_HEADER
#define MAC_FORMAT_FLAG_CREATE_WAV_HEADER
Definition: ape.c:40
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:69
MAC_FORMAT_FLAG_HAS_PEAK_LEVEL
#define MAC_FORMAT_FLAG_HAS_PEAK_LEVEL
Definition: ape.c:37
APEContext::wavheaderlength
uint32_t wavheaderlength
Definition: ape.c:66
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
AV_CODEC_ID_APE
@ AV_CODEC_ID_APE
Definition: codec_id.h:472
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:51
AV_WL32
#define AV_WL32(p, v)
Definition: intreadwrite.h:424
APEContext::finalframeblocks
uint32_t finalframeblocks
Definition: ape.c:76
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const struct AVCodec *c)
Add a new stream to a media file.
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
APEFrame::skip
int skip
Definition: ape.c:48
int64_t
long long int64_t
Definition: coverity.c:34
APEContext::totalsamples
uint32_t totalsamples
Definition: ape.c:56
apetag.h
AVPacket::data
uint8_t * data
Definition: packet.h:522
APEContext::fileversion
int16_t fileversion
Definition: ape.c:61
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:35
ape_probe
static int ape_probe(const AVProbeData *p)
Definition: ape.c:83
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:540
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:59
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:313
avio_size
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:322
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:67
AVINDEX_KEYFRAME
#define AVINDEX_KEYFRAME
Definition: avformat.h:610
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:463
APEContext::firstframe
uint32_t firstframe
Definition: ape.c:55
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:853
ffstream
static av_always_inline FFStream * ffstream(AVStream *st)
Definition: internal.h:417
APEContext::fileversion
int fileversion
codec version, very important in decoding process
Definition: apedec.c:160
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:494
pts
static int64_t pts
Definition: transcode_aac.c:643
APEContext::blocksperframe
uint32_t blocksperframe
Definition: ape.c:75
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:802
APEContext::compressiontype
uint16_t compressiontype
Definition: ape.c:73
avio_rl16
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:713
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
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_read_callback.c:41
APEContext::audiodatalength_high
uint32_t audiodatalength_high
Definition: ape.c:68
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:198
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:98
APEContext::junklength
uint32_t junklength
Definition: ape.c:54
ape_dumpinfo
static void ape_dumpinfo(AVFormatContext *s, APEContext *ape_ctx)
Definition: ape.c:95
APEContext::currentframe
int currentframe
Definition: ape.c:57
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:553
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:453
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:38
if
if(ret)
Definition: filter_design.txt:179
FF_INFMT_FLAG_INIT_CLEANUP
#define FF_INFMT_FLAG_INIT_CLEANUP
For an FFInputFormat with this flag set read_close() needs to be called by the caller upon read_heade...
Definition: demux.h:35
AVFormatContext
Format I/O context.
Definition: avformat.h:1255
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:766
APEContext::formatflags
uint16_t formatflags
Definition: ape.c:74
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:550
NULL
#define NULL
Definition: coverity.c:32
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:64
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:451
APEContext::md5
uint8_t md5[16]
Definition: ape.c:70
APEContext
Decoder context.
Definition: apedec.c:151
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
Audio only.
Definition: codec_par.h:180
APEContext::wavtaillength
uint32_t wavtaillength
Definition: ape.c:69
APEFrame::nblocks
int nblocks
Definition: ape.c:47
index
int index
Definition: gxfenc.c:89
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:184
AVStream::nb_frames
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:804
ff_dlog
#define ff_dlog(a,...)
Definition: tableprint_vlc.h:28
avio_rl32
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:729
AVIOContext
Bytestream IO Context.
Definition: avio.h:160
AVPacket::size
int size
Definition: packet.h:523
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:106
AVIOContext::seekable
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:261
APE_EXTRADATA_SIZE
#define APE_EXTRADATA_SIZE
Definition: ape.c:42
FFInputFormat::p
AVInputFormat p
The public AVInputFormat.
Definition: demux.h:41
AV_WL16
#define AV_WL16(p, v)
Definition: intreadwrite.h:410
APEContext::channels
uint16_t channels
Definition: ape.c:79
avio_r8
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:602
ape_read_header
static int ape_read_header(AVFormatContext *s)
Definition: ape.c:143
version
version
Definition: libkvazaar.c:321
APE_MIN_VERSION
#define APE_MIN_VERSION
Definition: ape.c:32
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:255
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:515
APEContext::totalframes
uint32_t totalframes
Definition: ape.c:77
av_malloc_array
#define av_malloc_array(a, b)
Definition: tableprint_vlc.h:31
APEContext::bps
uint16_t bps
Definition: ape.c:78
demux.h
APEFrame
Definition: ape.c:44
ape_read_packet
static int ape_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: ape.c:369
tag
uint32_t tag
Definition: movenc.c:1791
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:743
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:230
APEContext::samplerate
uint32_t samplerate
Definition: ape.c:80
APE_MAX_VERSION
#define APE_MAX_VERSION
Definition: ape.c:33
APEFrame::size
int64_t size
Definition: ape.c:46
pos
unsigned int pos
Definition: spdifenc.c:413
avformat.h
ape_read_close
static int ape_read_close(AVFormatContext *s)
Definition: ape.c:424
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:92
SIZE_SPECIFIER
#define SIZE_SPECIFIER
Definition: internal.h:141
APEFrame::pts
int64_t pts
Definition: ape.c:49
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:156
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:611
ff_ape_demuxer
const FFInputFormat ff_ape_demuxer
Definition: ape.c:448
AVIOContext::eof_reached
int eof_reached
true if was unable to read due to error or eof
Definition: avio.h:238
AVPacket::stream_index
int stream_index
Definition: packet.h:524
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:317
APEContext::headerlength
uint32_t headerlength
Definition: ape.c:64
MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS
#define MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS
Definition: ape.c:39
read_probe
static int read_probe(const AVProbeData *p)
Definition: cdg.c:30
APEFrame::pos
int64_t pos
Definition: ape.c:45
AVCodecParameters::bits_per_coded_sample
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:110
APEContext::bps
int bps
Definition: apedec.c:158
ape_read_seek
static int ape_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: ape.c:432
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:55
AVPacket
This structure stores compressed data.
Definition: packet.h:499
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
FFInputFormat
Definition: demux.h:37
int32_t
int32_t
Definition: audioconvert.c:56
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:482
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:792
APEContext::padding1
int16_t padding1
Definition: ape.c:62
APEContext::seektablelength
uint32_t seektablelength
Definition: ape.c:65
APEContext::descriptorlength
uint32_t descriptorlength
Definition: ape.c:63
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:243
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:239
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:345
APEContext::frames
APEFrame * frames
Definition: ape.c:58
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