FFmpeg  4.1.11
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;
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_probe(AVProbeData * p)
87 {
88  int version = AV_RL16(p->buf+4);
89  if (AV_RL32(p->buf) != MKTAG('M', 'A', 'C', ' '))
90  return 0;
91 
92  if (version < APE_MIN_VERSION || version > APE_MAX_VERSION)
93  return AVPROBE_SCORE_MAX/4;
94 
95  return AVPROBE_SCORE_MAX;
96 }
97 
98 static void ape_dumpinfo(AVFormatContext * s, APEContext * ape_ctx)
99 {
100 #ifdef DEBUG
101  int i;
102 
103  av_log(s, AV_LOG_DEBUG, "Descriptor Block:\n\n");
104  av_log(s, AV_LOG_DEBUG, "fileversion = %"PRId16"\n", ape_ctx->fileversion);
105  av_log(s, AV_LOG_DEBUG, "descriptorlength = %"PRIu32"\n", ape_ctx->descriptorlength);
106  av_log(s, AV_LOG_DEBUG, "headerlength = %"PRIu32"\n", ape_ctx->headerlength);
107  av_log(s, AV_LOG_DEBUG, "seektablelength = %"PRIu32"\n", ape_ctx->seektablelength);
108  av_log(s, AV_LOG_DEBUG, "wavheaderlength = %"PRIu32"\n", ape_ctx->wavheaderlength);
109  av_log(s, AV_LOG_DEBUG, "audiodatalength = %"PRIu32"\n", ape_ctx->audiodatalength);
110  av_log(s, AV_LOG_DEBUG, "audiodatalength_high = %"PRIu32"\n", ape_ctx->audiodatalength_high);
111  av_log(s, AV_LOG_DEBUG, "wavtaillength = %"PRIu32"\n", ape_ctx->wavtaillength);
112  av_log(s, AV_LOG_DEBUG, "md5 = ");
113  for (i = 0; i < 16; i++)
114  av_log(s, AV_LOG_DEBUG, "%02x", ape_ctx->md5[i]);
115  av_log(s, AV_LOG_DEBUG, "\n");
116 
117  av_log(s, AV_LOG_DEBUG, "\nHeader Block:\n\n");
118 
119  av_log(s, AV_LOG_DEBUG, "compressiontype = %"PRIu16"\n", ape_ctx->compressiontype);
120  av_log(s, AV_LOG_DEBUG, "formatflags = %"PRIu16"\n", ape_ctx->formatflags);
121  av_log(s, AV_LOG_DEBUG, "blocksperframe = %"PRIu32"\n", ape_ctx->blocksperframe);
122  av_log(s, AV_LOG_DEBUG, "finalframeblocks = %"PRIu32"\n", ape_ctx->finalframeblocks);
123  av_log(s, AV_LOG_DEBUG, "totalframes = %"PRIu32"\n", ape_ctx->totalframes);
124  av_log(s, AV_LOG_DEBUG, "bps = %"PRIu16"\n", ape_ctx->bps);
125  av_log(s, AV_LOG_DEBUG, "channels = %"PRIu16"\n", ape_ctx->channels);
126  av_log(s, AV_LOG_DEBUG, "samplerate = %"PRIu32"\n", ape_ctx->samplerate);
127 
128  av_log(s, AV_LOG_DEBUG, "\nSeektable\n\n");
129  if ((ape_ctx->seektablelength / sizeof(uint32_t)) != ape_ctx->totalframes) {
130  av_log(s, AV_LOG_DEBUG, "No seektable\n");
131  } else {
132  for (i = 0; i < ape_ctx->seektablelength / sizeof(uint32_t); i++) {
133  if (i < ape_ctx->totalframes - 1) {
134  av_log(s, AV_LOG_DEBUG, "%8d %"PRIu32" (%"PRIu32" bytes)",
135  i, ape_ctx->seektable[i],
136  ape_ctx->seektable[i + 1] - ape_ctx->seektable[i]);
137  if (ape_ctx->bittable)
138  av_log(s, AV_LOG_DEBUG, " + %2d bits\n",
139  ape_ctx->bittable[i]);
140  av_log(s, AV_LOG_DEBUG, "\n");
141  } else {
142  av_log(s, AV_LOG_DEBUG, "%8d %"PRIu32"\n", i, ape_ctx->seektable[i]);
143  }
144  }
145  }
146 
147  av_log(s, AV_LOG_DEBUG, "\nFrames\n\n");
148  for (i = 0; i < ape_ctx->totalframes; i++)
149  av_log(s, AV_LOG_DEBUG, "%8d %8"PRId64" %8"PRId64" (%d samples)\n", i,
150  ape_ctx->frames[i].pos, ape_ctx->frames[i].size,
151  ape_ctx->frames[i].nblocks);
152 
153  av_log(s, AV_LOG_DEBUG, "\nCalculated information:\n\n");
154  av_log(s, AV_LOG_DEBUG, "junklength = %"PRIu32"\n", ape_ctx->junklength);
155  av_log(s, AV_LOG_DEBUG, "firstframe = %"PRIu32"\n", ape_ctx->firstframe);
156  av_log(s, AV_LOG_DEBUG, "totalsamples = %"PRIu32"\n", ape_ctx->totalsamples);
157 #endif
158 }
159 
161 {
162  AVIOContext *pb = s->pb;
163  APEContext *ape = s->priv_data;
164  AVStream *st;
165  uint32_t tag;
166  int i;
167  int total_blocks;
168  int64_t final_size = 0;
169  int64_t pts, file_size;
170 
171  /* Skip any leading junk such as id3v2 tags */
172  ape->junklength = avio_tell(pb);
173 
174  tag = avio_rl32(pb);
175  if (tag != MKTAG('M', 'A', 'C', ' '))
176  return AVERROR_INVALIDDATA;
177 
178  ape->fileversion = avio_rl16(pb);
179 
181  av_log(s, AV_LOG_ERROR, "Unsupported file version - %d.%02d\n",
182  ape->fileversion / 1000, (ape->fileversion % 1000) / 10);
183  return AVERROR_PATCHWELCOME;
184  }
185 
186  if (ape->fileversion >= 3980) {
187  ape->padding1 = avio_rl16(pb);
188  ape->descriptorlength = avio_rl32(pb);
189  ape->headerlength = avio_rl32(pb);
190  ape->seektablelength = avio_rl32(pb);
191  ape->wavheaderlength = avio_rl32(pb);
192  ape->audiodatalength = avio_rl32(pb);
193  ape->audiodatalength_high = avio_rl32(pb);
194  ape->wavtaillength = avio_rl32(pb);
195  avio_read(pb, ape->md5, 16);
196 
197  /* Skip any unknown bytes at the end of the descriptor.
198  This is for future compatibility */
199  if (ape->descriptorlength > 52)
200  avio_skip(pb, ape->descriptorlength - 52);
201 
202  /* Read header data */
203  ape->compressiontype = avio_rl16(pb);
204  ape->formatflags = avio_rl16(pb);
205  ape->blocksperframe = avio_rl32(pb);
206  ape->finalframeblocks = avio_rl32(pb);
207  ape->totalframes = avio_rl32(pb);
208  ape->bps = avio_rl16(pb);
209  ape->channels = avio_rl16(pb);
210  ape->samplerate = avio_rl32(pb);
211  } else {
212  ape->descriptorlength = 0;
213  ape->headerlength = 32;
214 
215  ape->compressiontype = avio_rl16(pb);
216  ape->formatflags = avio_rl16(pb);
217  ape->channels = avio_rl16(pb);
218  ape->samplerate = avio_rl32(pb);
219  ape->wavheaderlength = avio_rl32(pb);
220  ape->wavtaillength = avio_rl32(pb);
221  ape->totalframes = avio_rl32(pb);
222  ape->finalframeblocks = avio_rl32(pb);
223 
225  avio_skip(pb, 4); /* Skip the peak level */
226  ape->headerlength += 4;
227  }
228 
230  ape->seektablelength = avio_rl32(pb);
231  ape->headerlength += 4;
232  ape->seektablelength *= sizeof(int32_t);
233  } else
234  ape->seektablelength = ape->totalframes * sizeof(int32_t);
235 
237  ape->bps = 8;
238  else if (ape->formatflags & MAC_FORMAT_FLAG_24_BIT)
239  ape->bps = 24;
240  else
241  ape->bps = 16;
242 
243  if (ape->fileversion >= 3950)
244  ape->blocksperframe = 73728 * 4;
245  else if (ape->fileversion >= 3900 || (ape->fileversion >= 3800 && ape->compressiontype >= 4000))
246  ape->blocksperframe = 73728;
247  else
248  ape->blocksperframe = 9216;
249 
250  /* Skip any stored wav header */
252  avio_skip(pb, ape->wavheaderlength);
253  }
254 
255  if(!ape->totalframes){
256  av_log(s, AV_LOG_ERROR, "No frames in the file!\n");
257  return AVERROR(EINVAL);
258  }
259  if(ape->totalframes > UINT_MAX / sizeof(APEFrame)){
260  av_log(s, AV_LOG_ERROR, "Too many frames: %"PRIu32"\n",
261  ape->totalframes);
262  return AVERROR_INVALIDDATA;
263  }
264  if (ape->seektablelength / sizeof(*ape->seektable) < ape->totalframes) {
265  av_log(s, AV_LOG_ERROR,
266  "Number of seek entries is less than number of frames: %"SIZE_SPECIFIER" vs. %"PRIu32"\n",
267  ape->seektablelength / sizeof(*ape->seektable), ape->totalframes);
268  return AVERROR_INVALIDDATA;
269  }
270  ape->frames = av_malloc_array(ape->totalframes, sizeof(APEFrame));
271  if(!ape->frames)
272  return AVERROR(ENOMEM);
273  ape->firstframe = ape->junklength + ape->descriptorlength + ape->headerlength + ape->seektablelength + ape->wavheaderlength;
274  if (ape->fileversion < 3810)
275  ape->firstframe += ape->totalframes;
276  ape->currentframe = 0;
277 
278 
279  ape->totalsamples = ape->finalframeblocks;
280  if (ape->totalframes > 1)
281  ape->totalsamples += ape->blocksperframe * (ape->totalframes - 1);
282 
283  if (ape->seektablelength > 0) {
284  ape->seektable = av_mallocz(ape->seektablelength);
285  if (!ape->seektable)
286  return AVERROR(ENOMEM);
287  for (i = 0; i < ape->seektablelength / sizeof(uint32_t) && !pb->eof_reached; i++)
288  ape->seektable[i] = avio_rl32(pb);
289  if (ape->fileversion < 3810) {
290  ape->bittable = av_mallocz(ape->totalframes);
291  if (!ape->bittable)
292  return AVERROR(ENOMEM);
293  for (i = 0; i < ape->totalframes && !pb->eof_reached; i++)
294  ape->bittable[i] = avio_r8(pb);
295  }
296  if (pb->eof_reached)
297  av_log(s, AV_LOG_WARNING, "File truncated\n");
298  }
299 
300  ape->frames[0].pos = ape->firstframe;
301  ape->frames[0].nblocks = ape->blocksperframe;
302  ape->frames[0].skip = 0;
303  for (i = 1; i < ape->totalframes; i++) {
304  ape->frames[i].pos = ape->seektable[i] + ape->junklength;
305  ape->frames[i].nblocks = ape->blocksperframe;
306  ape->frames[i - 1].size = ape->frames[i].pos - ape->frames[i - 1].pos;
307  ape->frames[i].skip = (ape->frames[i].pos - ape->frames[0].pos) & 3;
308  }
309  ape->frames[ape->totalframes - 1].nblocks = ape->finalframeblocks;
310  /* calculate final packet size from total file size, if available */
311  file_size = avio_size(pb);
312  if (file_size > 0) {
313  final_size = file_size - ape->frames[ape->totalframes - 1].pos -
314  ape->wavtaillength;
315  final_size -= final_size & 3;
316  }
317  if (file_size <= 0 || final_size <= 0)
318  final_size = ape->finalframeblocks * 8;
319  ape->frames[ape->totalframes - 1].size = final_size;
320 
321  for (i = 0; i < ape->totalframes; i++) {
322  if(ape->frames[i].skip){
323  ape->frames[i].pos -= ape->frames[i].skip;
324  ape->frames[i].size += ape->frames[i].skip;
325  }
326  if (ape->frames[i].size > INT_MAX - 3)
327  return AVERROR_INVALIDDATA;
328  ape->frames[i].size = (ape->frames[i].size + 3) & ~3;
329  }
330  if (ape->fileversion < 3810) {
331  for (i = 0; i < ape->totalframes; i++) {
332  if (i < ape->totalframes - 1 && ape->bittable[i + 1])
333  ape->frames[i].size += 4;
334  ape->frames[i].skip <<= 3;
335  ape->frames[i].skip += ape->bittable[i];
336  }
337  }
338 
339  ape_dumpinfo(s, ape);
340 
341  av_log(s, AV_LOG_VERBOSE, "Decoding file - v%d.%02d, compression level %"PRIu16"\n",
342  ape->fileversion / 1000, (ape->fileversion % 1000) / 10,
343  ape->compressiontype);
344 
345  /* now we are ready: build format streams */
346  st = avformat_new_stream(s, NULL);
347  if (!st)
348  return AVERROR(ENOMEM);
349 
350  total_blocks = (ape->totalframes == 0) ? 0 : ((ape->totalframes - 1) * ape->blocksperframe) + ape->finalframeblocks;
351 
354  st->codecpar->codec_tag = MKTAG('A', 'P', 'E', ' ');
355  st->codecpar->channels = ape->channels;
356  st->codecpar->sample_rate = ape->samplerate;
357  st->codecpar->bits_per_coded_sample = ape->bps;
358 
359  st->nb_frames = ape->totalframes;
360  st->start_time = 0;
361  st->duration = total_blocks;
362  avpriv_set_pts_info(st, 64, 1, ape->samplerate);
363 
365  return AVERROR(ENOMEM);
366  AV_WL16(st->codecpar->extradata + 0, ape->fileversion);
367  AV_WL16(st->codecpar->extradata + 2, ape->compressiontype);
368  AV_WL16(st->codecpar->extradata + 4, ape->formatflags);
369 
370  pts = 0;
371  for (i = 0; i < ape->totalframes; i++) {
372  ape->frames[i].pts = pts;
373  av_add_index_entry(st, ape->frames[i].pos, ape->frames[i].pts, 0, 0, AVINDEX_KEYFRAME);
374  pts += ape->blocksperframe;
375  }
376 
377  /* try to read APE tags */
378  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
379  ff_ape_parse_tag(s);
380  avio_seek(pb, 0, SEEK_SET);
381  }
382 
383  return 0;
384 }
385 
387 {
388  int ret;
389  int nblocks;
390  APEContext *ape = s->priv_data;
391  uint32_t extra_size = 8;
392 
393  if (avio_feof(s->pb))
394  return AVERROR_EOF;
395  if (ape->currentframe >= ape->totalframes)
396  return AVERROR_EOF;
397 
398  if (avio_seek(s->pb, ape->frames[ape->currentframe].pos, SEEK_SET) < 0)
399  return AVERROR(EIO);
400 
401  /* Calculate how many blocks there are in this frame */
402  if (ape->currentframe == (ape->totalframes - 1))
403  nblocks = ape->finalframeblocks;
404  else
405  nblocks = ape->blocksperframe;
406 
407  if (ape->frames[ape->currentframe].size <= 0 ||
408  ape->frames[ape->currentframe].size > INT_MAX - extra_size) {
409  av_log(s, AV_LOG_ERROR, "invalid packet size: %8"PRId64"\n",
410  ape->frames[ape->currentframe].size);
411  ape->currentframe++;
412  return AVERROR(EIO);
413  }
414 
415  if (av_new_packet(pkt, ape->frames[ape->currentframe].size + extra_size) < 0)
416  return AVERROR(ENOMEM);
417 
418  AV_WL32(pkt->data , nblocks);
419  AV_WL32(pkt->data + 4, ape->frames[ape->currentframe].skip);
420  ret = avio_read(s->pb, pkt->data + extra_size, ape->frames[ape->currentframe].size);
421  if (ret < 0) {
422  av_packet_unref(pkt);
423  return ret;
424  }
425 
426  pkt->pts = ape->frames[ape->currentframe].pts;
427  pkt->stream_index = 0;
428 
429  /* note: we need to modify the packet size here to handle the last
430  packet */
431  pkt->size = ret + extra_size;
432 
433  ape->currentframe++;
434 
435  return 0;
436 }
437 
439 {
440  APEContext *ape = s->priv_data;
441 
442  av_freep(&ape->frames);
443  av_freep(&ape->seektable);
444  av_freep(&ape->bittable);
445  return 0;
446 }
447 
448 static int ape_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
449 {
450  AVStream *st = s->streams[stream_index];
451  APEContext *ape = s->priv_data;
452  int index = av_index_search_timestamp(st, timestamp, flags);
453 
454  if (index < 0)
455  return -1;
456 
457  if (avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET) < 0)
458  return -1;
459  ape->currentframe = index;
460  return 0;
461 }
462 
464  .name = "ape",
465  .long_name = NULL_IF_CONFIG_SMALL("Monkey's Audio"),
466  .priv_data_size = sizeof(APEContext),
472  .extensions = "ape,apl,mac",
473 };
uint32_t audiodatalength
Definition: ape.c:66
#define NULL
Definition: coverity.c:32
static int ape_read_close(AVFormatContext *s)
Definition: ape.c:438
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:336
uint32_t wavtaillength
Definition: ape.c:68
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:2048
int fileversion
codec version, very important in decoding process
Definition: apedec.c:145
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
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:4899
int64_t pos
Definition: avformat.h:803
#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: avcodec.h:3900
int size
Definition: avcodec.h:1446
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:246
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1103
#define AV_RL16
Definition: intreadwrite.h:42
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:331
int version
Definition: avisynth_c.h:766
static AVPacket pkt
int currentframe
Definition: ape.c:56
uint32_t * seektable
Definition: ape.c:82
#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
int64_t size
Definition: ape.c:45
uint8_t
static int ape_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: ape.c:448
static int ape_probe(AVProbeData *p)
Definition: ape.c:86
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4469
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
uint8_t * data
Definition: avcodec.h:1445
uint32_t tag
Definition: movenc.c:1478
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:192
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:136
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:647
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:86
#define AVINDEX_KEYFRAME
Definition: avformat.h:810
int bps
Definition: apedec.c:143
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:258
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags)
Get the index for a specific timestamp.
Definition: utils.c:2159
uint32_t samplerate
Definition: ape.c:79
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:769
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:188
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3896
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
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
uint32_t totalsamples
Definition: ape.c:55
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:638
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:450
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:3299
int64_t pos
Definition: ape.c:44
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
static int ape_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: ape.c:386
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
#define AV_RL32
Definition: intreadwrite.h:146
AVInputFormat ff_ape_demuxer
Definition: ape.c:463
if(ret< 0)
Definition: vf_mcdeint.c:279
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:548
Definition: ape.c:43
Stream structure.
Definition: avformat.h:874
#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
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:598
static int ape_read_header(AVFormatContext *s)
Definition: ape.c:160
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:448
uint8_t * bittable
Definition: ape.c:83
#define SIZE_SPECIFIER
Definition: internal.h:264
#define flags(name, subs,...)
Definition: cbs_av1.c:610
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:923
uint32_t descriptorlength
Definition: ape.c:62
int sample_rate
Audio only.
Definition: avcodec.h:4010
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:460
int64_t pts
Definition: ape.c:48
#define APE_MAX_VERSION
Definition: ape.c:32
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:753
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:913
#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:925
int eof_reached
true if eof reached
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: avcodec.h:3942
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3914
int16_t padding1
Definition: ape.c:61
int channels
Audio only.
Definition: avcodec.h:4006
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:647
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1021
#define av_malloc_array(a, b)
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:358
int nblocks
Definition: ape.c:46
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3904
int stream_index
Definition: avcodec.h:1447
static void ape_dumpinfo(AVFormatContext *s, APEContext *ape_ctx)
Definition: ape.c:98
#define MKTAG(a, b, c, d)
Definition: common.h:366
uint32_t audiodatalength_high
Definition: ape.c:67
int channels
Definition: apedec.c:141
#define MAC_FORMAT_FLAG_CREATE_WAV_HEADER
Definition: ape.c:39
This structure stores compressed data.
Definition: avcodec.h:1422
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1438
#define AV_WL32(p, v)
Definition: intreadwrite.h:426