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;
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;
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 
81  /* Seektable */
82  uint32_t *seektable;
84 } APEContext;
85 
86 static int ape_read_close(AVFormatContext * s);
87 
88 static int ape_probe(const AVProbeData * p)
89 {
90  int version = AV_RL16(p->buf+4);
91  if (AV_RL32(p->buf) != MKTAG('M', 'A', 'C', ' '))
92  return 0;
93 
94  if (version < APE_MIN_VERSION || version > APE_MAX_VERSION)
95  return AVPROBE_SCORE_MAX/4;
96 
97  return AVPROBE_SCORE_MAX;
98 }
99 
100 static void ape_dumpinfo(AVFormatContext * s, APEContext * ape_ctx)
101 {
102 #ifdef DEBUG
103  int i;
104 
105  av_log(s, AV_LOG_DEBUG, "Descriptor Block:\n\n");
106  av_log(s, AV_LOG_DEBUG, "fileversion = %"PRId16"\n", ape_ctx->fileversion);
107  av_log(s, AV_LOG_DEBUG, "descriptorlength = %"PRIu32"\n", ape_ctx->descriptorlength);
108  av_log(s, AV_LOG_DEBUG, "headerlength = %"PRIu32"\n", ape_ctx->headerlength);
109  av_log(s, AV_LOG_DEBUG, "seektablelength = %"PRIu32"\n", ape_ctx->seektablelength);
110  av_log(s, AV_LOG_DEBUG, "wavheaderlength = %"PRIu32"\n", ape_ctx->wavheaderlength);
111  av_log(s, AV_LOG_DEBUG, "audiodatalength = %"PRIu32"\n", ape_ctx->audiodatalength);
112  av_log(s, AV_LOG_DEBUG, "audiodatalength_high = %"PRIu32"\n", ape_ctx->audiodatalength_high);
113  av_log(s, AV_LOG_DEBUG, "wavtaillength = %"PRIu32"\n", ape_ctx->wavtaillength);
114  av_log(s, AV_LOG_DEBUG, "md5 = ");
115  for (i = 0; i < 16; i++)
116  av_log(s, AV_LOG_DEBUG, "%02x", ape_ctx->md5[i]);
117  av_log(s, AV_LOG_DEBUG, "\n");
118 
119  av_log(s, AV_LOG_DEBUG, "\nHeader Block:\n\n");
120 
121  av_log(s, AV_LOG_DEBUG, "compressiontype = %"PRIu16"\n", ape_ctx->compressiontype);
122  av_log(s, AV_LOG_DEBUG, "formatflags = %"PRIu16"\n", ape_ctx->formatflags);
123  av_log(s, AV_LOG_DEBUG, "blocksperframe = %"PRIu32"\n", ape_ctx->blocksperframe);
124  av_log(s, AV_LOG_DEBUG, "finalframeblocks = %"PRIu32"\n", ape_ctx->finalframeblocks);
125  av_log(s, AV_LOG_DEBUG, "totalframes = %"PRIu32"\n", ape_ctx->totalframes);
126  av_log(s, AV_LOG_DEBUG, "bps = %"PRIu16"\n", ape_ctx->bps);
127  av_log(s, AV_LOG_DEBUG, "channels = %"PRIu16"\n", ape_ctx->channels);
128  av_log(s, AV_LOG_DEBUG, "samplerate = %"PRIu32"\n", ape_ctx->samplerate);
129 
130  av_log(s, AV_LOG_DEBUG, "\nSeektable\n\n");
131  if ((ape_ctx->seektablelength / sizeof(uint32_t)) != ape_ctx->totalframes) {
132  av_log(s, AV_LOG_DEBUG, "No seektable\n");
133  } else {
134  for (i = 0; i < ape_ctx->seektablelength / sizeof(uint32_t); i++) {
135  if (i < ape_ctx->totalframes - 1) {
136  av_log(s, AV_LOG_DEBUG, "%8d %"PRIu32" (%"PRIu32" bytes)",
137  i, ape_ctx->seektable[i],
138  ape_ctx->seektable[i + 1] - ape_ctx->seektable[i]);
139  if (ape_ctx->bittable)
140  av_log(s, AV_LOG_DEBUG, " + %2d bits\n",
141  ape_ctx->bittable[i]);
142  av_log(s, AV_LOG_DEBUG, "\n");
143  } else {
144  av_log(s, AV_LOG_DEBUG, "%8d %"PRIu32"\n", i, ape_ctx->seektable[i]);
145  }
146  }
147  }
148 
149  av_log(s, AV_LOG_DEBUG, "\nFrames\n\n");
150  for (i = 0; i < ape_ctx->totalframes; i++)
151  av_log(s, AV_LOG_DEBUG, "%8d %8"PRId64" %8d (%d samples)\n", i,
152  ape_ctx->frames[i].pos, ape_ctx->frames[i].size,
153  ape_ctx->frames[i].nblocks);
154 
155  av_log(s, AV_LOG_DEBUG, "\nCalculated information:\n\n");
156  av_log(s, AV_LOG_DEBUG, "junklength = %"PRIu32"\n", ape_ctx->junklength);
157  av_log(s, AV_LOG_DEBUG, "firstframe = %"PRIu32"\n", ape_ctx->firstframe);
158  av_log(s, AV_LOG_DEBUG, "totalsamples = %"PRIu32"\n", ape_ctx->totalsamples);
159 #endif
160 }
161 
163 {
164  AVIOContext *pb = s->pb;
165  APEContext *ape = s->priv_data;
166  AVStream *st;
167  uint32_t tag;
168  int i, ret;
169  int total_blocks, final_size = 0;
170  int64_t pts, file_size;
171 
172  /* Skip any leading junk such as id3v2 tags */
173  ape->junklength = avio_tell(pb);
174 
175  tag = avio_rl32(pb);
176  if (tag != MKTAG('M', 'A', 'C', ' '))
177  return AVERROR_INVALIDDATA;
178 
179  ape->fileversion = avio_rl16(pb);
180 
182  av_log(s, AV_LOG_ERROR, "Unsupported file version - %d.%02d\n",
183  ape->fileversion / 1000, (ape->fileversion % 1000) / 10);
184  return AVERROR_PATCHWELCOME;
185  }
186 
187  if (ape->fileversion >= 3980) {
188  ape->padding1 = avio_rl16(pb);
189  ape->descriptorlength = avio_rl32(pb);
190  ape->headerlength = avio_rl32(pb);
191  ape->seektablelength = avio_rl32(pb);
192  ape->wavheaderlength = avio_rl32(pb);
193  ape->audiodatalength = avio_rl32(pb);
194  ape->audiodatalength_high = avio_rl32(pb);
195  ape->wavtaillength = avio_rl32(pb);
196  avio_read(pb, ape->md5, 16);
197 
198  /* Skip any unknown bytes at the end of the descriptor.
199  This is for future compatibility */
200  if (ape->descriptorlength > 52)
201  avio_skip(pb, ape->descriptorlength - 52);
202 
203  /* Read header data */
204  ape->compressiontype = avio_rl16(pb);
205  ape->formatflags = avio_rl16(pb);
206  ape->blocksperframe = avio_rl32(pb);
207  ape->finalframeblocks = avio_rl32(pb);
208  ape->totalframes = avio_rl32(pb);
209  ape->bps = avio_rl16(pb);
210  ape->channels = avio_rl16(pb);
211  ape->samplerate = avio_rl32(pb);
212  } else {
213  ape->descriptorlength = 0;
214  ape->headerlength = 32;
215 
216  ape->compressiontype = avio_rl16(pb);
217  ape->formatflags = avio_rl16(pb);
218  ape->channels = avio_rl16(pb);
219  ape->samplerate = avio_rl32(pb);
220  ape->wavheaderlength = avio_rl32(pb);
221  ape->wavtaillength = avio_rl32(pb);
222  ape->totalframes = avio_rl32(pb);
223  ape->finalframeblocks = avio_rl32(pb);
224 
226  avio_skip(pb, 4); /* Skip the peak level */
227  ape->headerlength += 4;
228  }
229 
231  ape->seektablelength = avio_rl32(pb);
232  ape->headerlength += 4;
233  ape->seektablelength *= sizeof(int32_t);
234  } else
235  ape->seektablelength = ape->totalframes * sizeof(int32_t);
236 
238  ape->bps = 8;
239  else if (ape->formatflags & MAC_FORMAT_FLAG_24_BIT)
240  ape->bps = 24;
241  else
242  ape->bps = 16;
243 
244  if (ape->fileversion >= 3950)
245  ape->blocksperframe = 73728 * 4;
246  else if (ape->fileversion >= 3900 || (ape->fileversion >= 3800 && ape->compressiontype >= 4000))
247  ape->blocksperframe = 73728;
248  else
249  ape->blocksperframe = 9216;
250 
251  /* Skip any stored wav header */
253  avio_skip(pb, ape->wavheaderlength);
254  }
255 
256  if(!ape->totalframes){
257  av_log(s, AV_LOG_ERROR, "No frames in the file!\n");
258  return AVERROR(EINVAL);
259  }
260  if(ape->totalframes > UINT_MAX / sizeof(APEFrame)){
261  av_log(s, AV_LOG_ERROR, "Too many frames: %"PRIu32"\n",
262  ape->totalframes);
263  return AVERROR_INVALIDDATA;
264  }
265  if (ape->seektablelength / sizeof(*ape->seektable) < ape->totalframes) {
266  av_log(s, AV_LOG_ERROR,
267  "Number of seek entries is less than number of frames: %"SIZE_SPECIFIER" vs. %"PRIu32"\n",
268  ape->seektablelength / sizeof(*ape->seektable), ape->totalframes);
269  return AVERROR_INVALIDDATA;
270  }
271  ape->frames = av_malloc_array(ape->totalframes, sizeof(APEFrame));
272  if(!ape->frames)
273  return AVERROR(ENOMEM);
274  ape->firstframe = ape->junklength + ape->descriptorlength + ape->headerlength + ape->seektablelength + ape->wavheaderlength;
275  if (ape->fileversion < 3810)
276  ape->firstframe += ape->totalframes;
277  ape->currentframe = 0;
278 
279 
280  ape->totalsamples = ape->finalframeblocks;
281  if (ape->totalframes > 1)
282  ape->totalsamples += ape->blocksperframe * (ape->totalframes - 1);
283 
284  if (ape->seektablelength > 0) {
285  ape->seektable = av_mallocz(ape->seektablelength);
286  if (!ape->seektable) {
287  ret = AVERROR(ENOMEM);
288  goto fail;
289  }
290  for (i = 0; i < ape->seektablelength / sizeof(uint32_t) && !pb->eof_reached; i++)
291  ape->seektable[i] = avio_rl32(pb);
292  if (ape->fileversion < 3810) {
293  ape->bittable = av_mallocz(ape->totalframes);
294  if (!ape->bittable) {
295  ret = AVERROR(ENOMEM);
296  goto fail;
297  }
298  for (i = 0; i < ape->totalframes && !pb->eof_reached; i++)
299  ape->bittable[i] = avio_r8(pb);
300  }
301  if (pb->eof_reached)
302  av_log(s, AV_LOG_WARNING, "File truncated\n");
303  }
304 
305  ape->frames[0].pos = ape->firstframe;
306  ape->frames[0].nblocks = ape->blocksperframe;
307  ape->frames[0].skip = 0;
308  for (i = 1; i < ape->totalframes; i++) {
309  ape->frames[i].pos = ape->seektable[i] + ape->junklength;
310  ape->frames[i].nblocks = ape->blocksperframe;
311  ape->frames[i - 1].size = ape->frames[i].pos - ape->frames[i - 1].pos;
312  ape->frames[i].skip = (ape->frames[i].pos - ape->frames[0].pos) & 3;
313  }
314  ape->frames[ape->totalframes - 1].nblocks = ape->finalframeblocks;
315  /* calculate final packet size from total file size, if available */
316  file_size = avio_size(pb);
317  if (file_size > 0) {
318  final_size = file_size - ape->frames[ape->totalframes - 1].pos -
319  ape->wavtaillength;
320  final_size -= final_size & 3;
321  }
322  if (file_size <= 0 || final_size <= 0)
323  final_size = ape->finalframeblocks * 8;
324  ape->frames[ape->totalframes - 1].size = final_size;
325 
326  for (i = 0; i < ape->totalframes; i++) {
327  if(ape->frames[i].skip){
328  ape->frames[i].pos -= ape->frames[i].skip;
329  ape->frames[i].size += ape->frames[i].skip;
330  }
331  ape->frames[i].size = (ape->frames[i].size + 3) & ~3;
332  }
333  if (ape->fileversion < 3810) {
334  for (i = 0; i < ape->totalframes; i++) {
335  if (i < ape->totalframes - 1 && ape->bittable[i + 1])
336  ape->frames[i].size += 4;
337  ape->frames[i].skip <<= 3;
338  ape->frames[i].skip += ape->bittable[i];
339  }
340  }
341 
342  ape_dumpinfo(s, ape);
343 
344  av_log(s, AV_LOG_VERBOSE, "Decoding file - v%d.%02d, compression level %"PRIu16"\n",
345  ape->fileversion / 1000, (ape->fileversion % 1000) / 10,
346  ape->compressiontype);
347 
348  /* now we are ready: build format streams */
349  st = avformat_new_stream(s, NULL);
350  if (!st) {
351  ret = AVERROR(ENOMEM);
352  goto fail;
353  }
354 
355  total_blocks = (ape->totalframes == 0) ? 0 : ((ape->totalframes - 1) * ape->blocksperframe) + ape->finalframeblocks;
356 
359  st->codecpar->codec_tag = MKTAG('A', 'P', 'E', ' ');
360  st->codecpar->channels = ape->channels;
361  st->codecpar->sample_rate = ape->samplerate;
362  st->codecpar->bits_per_coded_sample = ape->bps;
363 
364  st->nb_frames = ape->totalframes;
365  st->start_time = 0;
366  st->duration = total_blocks;
367  avpriv_set_pts_info(st, 64, 1, ape->samplerate);
368 
369  if ((ret = ff_alloc_extradata(st->codecpar, APE_EXTRADATA_SIZE)) < 0)
370  goto fail;
371  AV_WL16(st->codecpar->extradata + 0, ape->fileversion);
372  AV_WL16(st->codecpar->extradata + 2, ape->compressiontype);
373  AV_WL16(st->codecpar->extradata + 4, ape->formatflags);
374 
375  pts = 0;
376  for (i = 0; i < ape->totalframes; i++) {
377  ape->frames[i].pts = pts;
378  av_add_index_entry(st, ape->frames[i].pos, ape->frames[i].pts, 0, 0, AVINDEX_KEYFRAME);
379  pts += ape->blocksperframe;
380  }
381 
382  /* try to read APE tags */
383  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
384  ff_ape_parse_tag(s);
385  avio_seek(pb, 0, SEEK_SET);
386  }
387 
388  return 0;
389 fail:
390  ape_read_close(s);
391 
392  return ret;
393 }
394 
396 {
397  int ret;
398  int nblocks;
399  APEContext *ape = s->priv_data;
400  uint32_t extra_size = 8;
401  int64_t ret64;
402 
403  if (avio_feof(s->pb))
404  return AVERROR_EOF;
405  if (ape->currentframe >= ape->totalframes)
406  return AVERROR_EOF;
407 
408  ret64 = avio_seek(s->pb, ape->frames[ape->currentframe].pos, SEEK_SET);
409  if (ret64 < 0)
410  return ret64;
411 
412  /* Calculate how many blocks there are in this frame */
413  if (ape->currentframe == (ape->totalframes - 1))
414  nblocks = ape->finalframeblocks;
415  else
416  nblocks = ape->blocksperframe;
417 
418  if (ape->frames[ape->currentframe].size <= 0 ||
419  ape->frames[ape->currentframe].size > INT_MAX - extra_size) {
420  av_log(s, AV_LOG_ERROR, "invalid packet size: %d\n",
421  ape->frames[ape->currentframe].size);
422  ape->currentframe++;
423  return AVERROR(EIO);
424  }
425 
426  ret = av_new_packet(pkt, ape->frames[ape->currentframe].size + extra_size);
427  if (ret < 0)
428  return ret;
429 
430  AV_WL32(pkt->data , nblocks);
431  AV_WL32(pkt->data + 4, ape->frames[ape->currentframe].skip);
432  ret = avio_read(s->pb, pkt->data + extra_size, ape->frames[ape->currentframe].size);
433  if (ret < 0) {
434  return ret;
435  }
436 
437  pkt->pts = ape->frames[ape->currentframe].pts;
438  pkt->stream_index = 0;
439 
440  /* note: we need to modify the packet size here to handle the last
441  packet */
442  pkt->size = ret + extra_size;
443 
444  ape->currentframe++;
445 
446  return 0;
447 }
448 
450 {
451  APEContext *ape = s->priv_data;
452 
453  av_freep(&ape->frames);
454  av_freep(&ape->seektable);
455  av_freep(&ape->bittable);
456  return 0;
457 }
458 
459 static int ape_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
460 {
461  AVStream *st = s->streams[stream_index];
462  APEContext *ape = s->priv_data;
463  int index = av_index_search_timestamp(st, timestamp, flags);
464  int64_t ret;
465 
466  if (index < 0)
467  return -1;
468 
469  if ((ret = avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET)) < 0)
470  return ret;
471  ape->currentframe = index;
472  return 0;
473 }
474 
476  .name = "ape",
477  .long_name = NULL_IF_CONFIG_SMALL("Monkey's Audio"),
478  .priv_data_size = sizeof(APEContext),
484  .extensions = "ape,apl,mac",
485 };
uint32_t audiodatalength
Definition: ape.c:66
#define NULL
Definition: coverity.c:32
static int ape_read_close(AVFormatContext *s)
Definition: ape.c:449
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:346
uint32_t wavtaillength
Definition: ape.c:68
version
Definition: libkvazaar.c:292
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:2045
int fileversion
codec version, very important in decoding process
Definition: apedec.c:146
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
uint32_t blocksperframe
Definition: ape.c:74
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:4938
int64_t pos
Definition: avformat.h:805
#define MAC_FORMAT_FLAG_24_BIT
Definition: ape.c:37
uint32_t wavheaderlength
Definition: ape.c:65
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
int size
Definition: packet.h:356
uint16_t channels
Definition: ape.c:78
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:253
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1105
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:341
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
static AVPacket pkt
int currentframe
Definition: ape.c:56
uint32_t * seektable
Definition: ape.c:82
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:87
#define MAC_FORMAT_FLAG_HAS_PEAK_LEVEL
Definition: ape.c:36
Format I/O context.
Definition: avformat.h:1351
int16_t fileversion
Definition: ape.c:60
uint8_t
static int ape_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: ape.c:459
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4519
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
uint32_t seektablelength
Definition: ape.c:64
struct AVMD5 * md5
Definition: movenc.c:56
static int ape_probe(const AVProbeData *p)
Definition: ape.c:88
uint8_t * data
Definition: packet.h:355
uint32_t tag
Definition: movenc.c:1532
APEFrame * frames
Definition: ape.c:57
#define AVERROR_EOF
End of file.
Definition: error.h:55
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:210
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
#define MAC_FORMAT_FLAG_8_BIT
Definition: ape.c:34
Decoder context.
Definition: apedec.c:137
uint16_t compressiontype
Definition: ape.c:72
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:637
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:88
#define AVINDEX_KEYFRAME
Definition: avformat.h:812
int bps
Definition: apedec.c:144
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags)
Get the index for a specific timestamp.
Definition: utils.c:2162
uint32_t samplerate
Definition: ape.c:79
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:759
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:153
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
uint8_t md5[16]
Definition: ape.c:69
#define MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS
Definition: ape.c:38
int64_t ff_ape_parse_tag(AVFormatContext *s)
Read and parse an APE tag.
Definition: apetag.c:118
int skip
Definition: ape.c:47
#define fail()
Definition: checkasm.h:123
uint32_t totalsamples
Definition: ape.c:55
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:628
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
int size
Definition: ape.c:46
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
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:3321
int64_t pos
Definition: ape.c:44
static int ape_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: ape.c:395
uint32_t finalframeblocks
Definition: ape.c:75
int32_t
#define s(width, name)
Definition: cbs_vp9.c:257
uint32_t junklength
Definition: ape.c:53
uint16_t formatflags
Definition: ape.c:73
AVInputFormat ff_ape_demuxer
Definition: ape.c:475
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
if(ret)
Definition: ape.c:43
Stream structure.
Definition: avformat.h:876
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
uint16_t bps
Definition: ape.c:77
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
uint32_t totalframes
Definition: ape.c:76
static int ape_read_header(AVFormatContext *s)
Definition: ape.c:162
uint32_t headerlength
Definition: ape.c:63
#define APE_MIN_VERSION
Definition: ape.c:31
int index
Definition: gxfenc.c:89
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
uint8_t * bittable
Definition: ape.c:83
#define SIZE_SPECIFIER
Definition: internal.h:229
#define flags(name, subs,...)
Definition: cbs_av1.c:560
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:925
uint32_t descriptorlength
Definition: ape.c:62
int sample_rate
Audio only.
Definition: codec_par.h:170
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
int64_t pts
Definition: ape.c:48
#define APE_MAX_VERSION
Definition: ape.c:32
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:743
Main libavformat public API header.
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
Definition: avformat.h:915
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:927
int eof_reached
true if was unable to read due to error or eof
Definition: avio.h:239
void * priv_data
Format private data.
Definition: avformat.h:1379
#define APE_EXTRADATA_SIZE
Definition: ape.c:41
uint32_t firstframe
Definition: ape.c:54
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:102
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
int16_t padding1
Definition: ape.c:61
int channels
Audio only.
Definition: codec_par.h:166
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:650
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1023
#define av_malloc_array(a, b)
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:368
int nblocks
Definition: ape.c:45
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
int stream_index
Definition: packet.h:357
static void ape_dumpinfo(AVFormatContext *s, APEContext *ape_ctx)
Definition: ape.c:100
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
#define MKTAG(a, b, c, d)
Definition: common.h:406
uint32_t audiodatalength_high
Definition: ape.c:67
int channels
Definition: apedec.c:142
#define MAC_FORMAT_FLAG_CREATE_WAV_HEADER
Definition: ape.c:39
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: packet.h:332
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:348
int i
Definition: input.c:406
#define AV_WL32(p, v)
Definition: intreadwrite.h:426