FFmpeg: libavformat/ape.c Source File

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   int nblocks;
46   int size;
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_read_close(AVFormatContext * s);
83 
84  static int ape_probe(const AVProbeData * p)
85 {
86  int version = AV_RL16(p->buf+4);
87  if (AV_RL32(p->buf) != MKTAG('M', 'A', 'C', ' '))
88  return 0;
89 
90  if (version < APE_MIN_VERSION || version > APE_MAX_VERSION)
91  return AVPROBE_SCORE_MAX/4;
92 
93  return AVPROBE_SCORE_MAX;
94 }
95 
96  static void ape_dumpinfo(AVFormatContext * s, APEContext * ape_ctx)
97 {
98 #ifdef DEBUG
99  int i;
100 
101  av_log(s, AV_LOG_DEBUG, "Descriptor Block:\n\n");
102  av_log(s, AV_LOG_DEBUG, "fileversion = %"PRId16"\n", ape_ctx->fileversion);
103  av_log(s, AV_LOG_DEBUG, "descriptorlength = %"PRIu32"\n", ape_ctx->descriptorlength);
104  av_log(s, AV_LOG_DEBUG, "headerlength = %"PRIu32"\n", ape_ctx->headerlength);
105  av_log(s, AV_LOG_DEBUG, "seektablelength = %"PRIu32"\n", ape_ctx->seektablelength);
106  av_log(s, AV_LOG_DEBUG, "wavheaderlength = %"PRIu32"\n", ape_ctx->wavheaderlength);
107  av_log(s, AV_LOG_DEBUG, "audiodatalength = %"PRIu32"\n", ape_ctx->audiodatalength);
108  av_log(s, AV_LOG_DEBUG, "audiodatalength_high = %"PRIu32"\n", ape_ctx->audiodatalength_high);
109  av_log(s, AV_LOG_DEBUG, "wavtaillength = %"PRIu32"\n", ape_ctx->wavtaillength);
110  av_log(s, AV_LOG_DEBUG, "md5 = ");
111  for (i = 0; i < 16; i++)
112  av_log(s, AV_LOG_DEBUG, "%02x", ape_ctx->md5[i]);
113  av_log(s, AV_LOG_DEBUG, "\n");
114 
115  av_log(s, AV_LOG_DEBUG, "\nHeader Block:\n\n");
116 
117  av_log(s, AV_LOG_DEBUG, "compressiontype = %"PRIu16"\n", ape_ctx->compressiontype);
118  av_log(s, AV_LOG_DEBUG, "formatflags = %"PRIu16"\n", ape_ctx->formatflags);
119  av_log(s, AV_LOG_DEBUG, "blocksperframe = %"PRIu32"\n", ape_ctx->blocksperframe);
120  av_log(s, AV_LOG_DEBUG, "finalframeblocks = %"PRIu32"\n", ape_ctx->finalframeblocks);
121  av_log(s, AV_LOG_DEBUG, "totalframes = %"PRIu32"\n", ape_ctx->totalframes);
122  av_log(s, AV_LOG_DEBUG, "bps = %"PRIu16"\n", ape_ctx->bps);
123  av_log(s, AV_LOG_DEBUG, "channels = %"PRIu16"\n", ape_ctx->channels);
124  av_log(s, AV_LOG_DEBUG, "samplerate = %"PRIu32"\n", ape_ctx->samplerate);
125 
126  av_log(s, AV_LOG_DEBUG, "\nSeektable\n\n");
127  if ((ape_ctx->seektablelength / sizeof(uint32_t)) != ape_ctx->totalframes) {
128  av_log(s, AV_LOG_DEBUG, "No seektable\n");
129  }
130 
131  av_log(s, AV_LOG_DEBUG, "\nFrames\n\n");
132  for (i = 0; i < ape_ctx->totalframes; i++)
133  av_log(s, AV_LOG_DEBUG, "%8d %8"PRId64" %8d (%d samples)\n", i,
134  ape_ctx->frames[i].pos, ape_ctx->frames[i].size,
135  ape_ctx->frames[i].nblocks);
136 
137  av_log(s, AV_LOG_DEBUG, "\nCalculated information:\n\n");
138  av_log(s, AV_LOG_DEBUG, "junklength = %"PRIu32"\n", ape_ctx->junklength);
139  av_log(s, AV_LOG_DEBUG, "firstframe = %"PRIu32"\n", ape_ctx->firstframe);
140  av_log(s, AV_LOG_DEBUG, "totalsamples = %"PRIu32"\n", ape_ctx->totalsamples);
141 #endif
142 }
143 
144  static int ape_read_header(AVFormatContext * s)
145 {
146  AVIOContext *pb = s->pb;
147  APEContext *ape = s->priv_data;
148  AVStream *st;
149  uint32_t tag;
150  int i, ret;
151  int total_blocks, 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  ret = AVERROR_INVALIDDATA;
280  goto fail;
281  }
282  ff_dlog(s, "seektable: %8d %"PRIu32"\n", i, seektable_entry);
283  }
284  avio_skip(pb, ape->seektablelength / sizeof(uint32_t) - ape->totalframes);
285 
286  ape->frames[ape->totalframes - 1].nblocks = ape->finalframeblocks;
287  /* calculate final packet size from total file size, if available */
288  file_size = avio_size(pb);
289  if (file_size > 0) {
290  final_size = file_size - ape->frames[ape->totalframes - 1].pos -
291  ape->wavtaillength;
292  final_size -= final_size & 3;
293  }
294  if (file_size <= 0 || final_size <= 0)
295  final_size = ape->finalframeblocks * 8;
296  ape->frames[ape->totalframes - 1].size = final_size;
297 
298  for (i = 0; i < ape->totalframes; i++) {
299  if(ape->frames[i].skip){
300  ape->frames[i].pos -= ape->frames[i].skip;
301  ape->frames[i].size += ape->frames[i].skip;
302  }
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  ret = AVERROR_INVALIDDATA;
317  goto fail;
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  ret = AVERROR(ENOMEM);
332  goto fail;
333  }
334 
335  total_blocks = (ape->totalframes == 0) ? 0 : ((ape->totalframes - 1) * ape->blocksperframe) + ape->finalframeblocks;
336 
337  st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
338  st->codecpar->codec_id = AV_CODEC_ID_APE;
339  st->codecpar->codec_tag = MKTAG('A', 'P', 'E', ' ');
340  st->codecpar->channels = ape->channels;
341  st->codecpar->sample_rate = ape->samplerate;
342  st->codecpar->bits_per_coded_sample = ape->bps;
343 
344  st->nb_frames = ape->totalframes;
345  st->start_time = 0;
346  st->duration = total_blocks;
347  avpriv_set_pts_info(st, 64, 1, ape->samplerate);
348 
349  if ((ret = ff_alloc_extradata(st->codecpar, APE_EXTRADATA_SIZE)) < 0)
350  goto fail;
351  AV_WL16(st->codecpar->extradata + 0, ape->fileversion);
352  AV_WL16(st->codecpar->extradata + 2, ape->compressiontype);
353  AV_WL16(st->codecpar->extradata + 4, ape->formatflags);
354 
355  pts = 0;
356  for (i = 0; i < ape->totalframes; i++) {
357  ape->frames[i].pts = pts;
358  av_add_index_entry(st, ape->frames[i].pos, ape->frames[i].pts, 0, 0, AVINDEX_KEYFRAME);
359  pts += ape->blocksperframe;
360  }
361 
362  /* try to read APE tags */
363  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
364  ff_ape_parse_tag(s);
365  avio_seek(pb, 0, SEEK_SET);
366  }
367 
368  return 0;
369 fail:
370  ape_read_close(s);
371 
372  return ret;
373 }
374 
375  static int ape_read_packet(AVFormatContext * s, AVPacket * pkt)
376 {
377  int ret;
378  int nblocks;
379  APEContext *ape = s->priv_data;
380  uint32_t extra_size = 8;
381  int64_t ret64;
382 
383  if (avio_feof(s->pb))
384  return AVERROR_EOF;
385  if (ape->currentframe >= ape->totalframes)
386  return AVERROR_EOF;
387 
388  ret64 = avio_seek(s->pb, ape->frames[ape->currentframe].pos, SEEK_SET);
389  if (ret64 < 0)
390  return ret64;
391 
392  /* Calculate how many blocks there are in this frame */
393  if (ape->currentframe == (ape->totalframes - 1))
394  nblocks = ape->finalframeblocks;
395  else
396  nblocks = ape->blocksperframe;
397 
398  if (ape->frames[ape->currentframe].size <= 0 ||
399  ape->frames[ape->currentframe].size > INT_MAX - extra_size) {
400  av_log(s, AV_LOG_ERROR, "invalid packet size: %d\n",
401  ape->frames[ape->currentframe].size);
402  ape->currentframe++;
403  return AVERROR(EIO);
404  }
405 
406  ret = av_new_packet(pkt, ape->frames[ape->currentframe].size + extra_size);
407  if (ret < 0)
408  return ret;
409 
410  AV_WL32(pkt->data , nblocks);
411  AV_WL32(pkt->data + 4, ape->frames[ape->currentframe].skip);
412  ret = avio_read(s->pb, pkt->data + extra_size, ape->frames[ape->currentframe].size);
413  if (ret < 0) {
414  return ret;
415  }
416 
417  pkt->pts = ape->frames[ape->currentframe].pts;
418  pkt->stream_index = 0;
419 
420  /* note: we need to modify the packet size here to handle the last
421  packet */
422  pkt->size = ret + extra_size;
423 
424  ape->currentframe++;
425 
426  return 0;
427 }
428 
429  static int ape_read_close(AVFormatContext * s)
430 {
431  APEContext *ape = s->priv_data;
432 
433  av_freep(&ape->frames);
434  return 0;
435 }
436 
437  static int ape_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
438 {
439  AVStream *st = s->streams[stream_index];
440  APEContext *ape = s->priv_data;
441  int index = av_index_search_timestamp(st, timestamp, flags);
442  int64_t ret;
443 
444  if (index < 0)
445  return -1;
446 
447  if ((ret = avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET)) < 0)
448  return ret;
449  ape->currentframe = index;
450  return 0;
451 }
452 
453  AVInputFormat ff_ape_demuxer = {
454  .name = "ape",
455  .long_name = NULL_IF_CONFIG_SMALL("Monkey's Audio"),
456  .priv_data_size = sizeof(APEContext),
457  .read_probe = ape_probe,
458  .read_header = ape_read_header,
459  .read_packet = ape_read_packet,
460  .read_close = ape_read_close,
461  .read_seek = ape_read_seek,
462  .extensions = "ape,apl,mac",
463 };
AVStream::index_entries
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1090
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:74
MAC_FORMAT_FLAG_HAS_PEAK_LEVEL
#define MAC_FORMAT_FLAG_HAS_PEAK_LEVEL
Definition: ape.c:36
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: utils.c:4509
AV_CODEC_ID_APE
@ AV_CODEC_ID_APE
Definition: codec_id.h:456
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
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:55
MKTAG
#define MKTAG(a, b, c, d)
Definition: common.h:478
APEFrame::skip
int skip
Definition: ape.c:47
APEContext::totalsamples
uint32_t totalsamples
Definition: ape.c:55
apetag.h
APEFrame::size
int size
Definition: ape.c:46
AVPacket::data
uint8_t * data
Definition: packet.h:369
APEContext::fileversion
int16_t fileversion
Definition: ape.c:60
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:210
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:84
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
avio_size
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:342
ff_ape_parse_tag
int64_t ff_ape_parse_tag(AVFormatContext *s)
Read and parse an APE tag.
Definition: apetag.c:118
APEContext::audiodatalength
uint32_t audiodatalength
Definition: ape.c:66
AVINDEX_KEYFRAME
#define AVINDEX_KEYFRAME
Definition: avformat.h:811
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
APEContext::firstframe
uint32_t firstframe
Definition: ape.c:54
AVCodecParameters::channels
int channels
Audio only.
Definition: codec_par.h:166
fail
#define fail()
Definition: checkasm.h:133
APEContext::fileversion
int fileversion
codec version, very important in decoding process
Definition: apedec.c:161
read_seek
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
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: utils.c:2013
read_close
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
pts
static int64_t pts
Definition: transcode_aac.c:652
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:922
APEContext::compressiontype
uint16_t compressiontype
Definition: ape.c:72
avio_rl16
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:734
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:194
AVInputFormat
Definition: avformat.h:640
APEContext::audiodatalength_high
uint32_t audiodatalength_high
Definition: ape.c:67
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:257
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:99
APEContext::junklength
uint32_t junklength
Definition: ape.c:53
ape_dumpinfo
static void ape_dumpinfo(AVFormatContext *s, APEContext *ape_ctx)
Definition: ape.c:96
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:645
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
bits
uint8_t bits
Definition: vp3data.h:141
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
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
int32_t
int32_t
Definition: audio_convert.c:194
if
if(ret)
Definition: filter_design.txt:179
AVFormatContext
Format I/O context.
Definition: avformat.h:1232
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1038
APEContext::formatflags
uint16_t formatflags
Definition: ape.c:73
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
NULL
#define NULL
Definition: coverity.c:32
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
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:441
APEContext::md5
uint8_t md5[16]
Definition: ape.c:69
APEContext
Decoder context.
Definition: apedec.c:152
APEContext::wavtaillength
uint32_t wavtaillength
Definition: ape.c:68
APEFrame::nblocks
int nblocks
Definition: ape.c:45
index
int index
Definition: gxfenc.c:89
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:170
AVStream::nb_frames
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:924
ff_dlog
#define ff_dlog(a,...)
Definition: tableprint_vlc.h:29
avio_rl32
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:750
AVIOContext
Bytestream IO Context.
Definition: avio.h:161
AVPacket::size
int size
Definition: packet.h:370
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:117
AVIOContext::seekable
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
avpriv_set_pts_info
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:4945
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:624
ape_read_header
static int ape_read_header(AVFormatContext *s)
Definition: ape.c:144
version
version
Definition: libkvazaar.c:326
APE_MIN_VERSION
#define APE_MIN_VERSION
Definition: ape.c:31
i
int i
Definition: input.c:407
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:362
APEContext::totalframes
uint32_t totalframes
Definition: ape.c:76
av_malloc_array
#define av_malloc_array(a, b)
Definition: tableprint_vlc.h:32
APEContext::bps
uint16_t bps
Definition: ape.c:77
uint8_t
uint8_t
Definition: audio_convert.c:194
APEFrame
Definition: ape.c:43
ape_read_packet
static int ape_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: ape.c:375
tag
uint32_t tag
Definition: movenc.c:1611
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:873
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:253
APEContext::samplerate
uint32_t samplerate
Definition: ape.c:79
ff_ape_demuxer
AVInputFormat ff_ape_demuxer
Definition: ape.c:453
APE_MAX_VERSION
#define APE_MAX_VERSION
Definition: ape.c:32
avformat.h
ape_read_close
static int ape_read_close(AVFormatContext *s)
Definition: ape.c:429
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:92
SIZE_SPECIFIER
#define SIZE_SPECIFIER
Definition: internal.h:193
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:40
APEContext::channels
int channels
Definition: apedec.c:157
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:633
AVIndexEntry::pos
int64_t pos
Definition: avformat.h:804
AVIOContext::eof_reached
int eof_reached
true if was unable to read due to error or eof
Definition: avio.h:239
AVPacket::stream_index
int stream_index
Definition: packet.h:371
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:337
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:102
APEContext::bps
int bps
Definition: apedec.c:159
ape_read_seek
static int ape_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: ape.c:437
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
AVPacket
This structure stores compressed data.
Definition: packet.h:346
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
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:912
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: utils.c:2130
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:3314
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:364
APEContext::frames
APEFrame * frames
Definition: ape.c:57
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