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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  char magic[4];
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;
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 
82  /* Seektable */
83  uint32_t *seektable;
85 } APEContext;
86 
87 static int ape_probe(AVProbeData * p)
88 {
89  int version = AV_RL16(p->buf+4);
90  if (AV_RL32(p->buf) != MKTAG('M', 'A', 'C', ' '))
91  return 0;
92 
93  if (version < APE_MIN_VERSION || version > APE_MAX_VERSION)
94  return AVPROBE_SCORE_MAX/4;
95 
96  return AVPROBE_SCORE_MAX;
97 }
98 
99 static void ape_dumpinfo(AVFormatContext * s, APEContext * ape_ctx)
100 {
101 #ifdef DEBUG
102  int i;
103 
104  av_log(s, AV_LOG_DEBUG, "Descriptor Block:\n\n");
105  av_log(s, AV_LOG_DEBUG, "magic = \"%c%c%c%c\"\n", ape_ctx->magic[0], ape_ctx->magic[1], ape_ctx->magic[2], ape_ctx->magic[3]);
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;
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  return AVERROR(ENOMEM);
288  for (i = 0; i < ape->seektablelength / sizeof(uint32_t) && !pb->eof_reached; i++)
289  ape->seektable[i] = avio_rl32(pb);
290  if (ape->fileversion < 3810) {
291  ape->bittable = av_mallocz(ape->totalframes);
292  if (!ape->bittable)
293  return AVERROR(ENOMEM);
294  for (i = 0; i < ape->totalframes && !pb->eof_reached; i++)
295  ape->bittable[i] = avio_r8(pb);
296  }
297  if (pb->eof_reached)
298  av_log(s, AV_LOG_WARNING, "File truncated\n");
299  }
300 
301  ape->frames[0].pos = ape->firstframe;
302  ape->frames[0].nblocks = ape->blocksperframe;
303  ape->frames[0].skip = 0;
304  for (i = 1; i < ape->totalframes; i++) {
305  ape->frames[i].pos = ape->seektable[i] + ape->junklength;
306  ape->frames[i].nblocks = ape->blocksperframe;
307  ape->frames[i - 1].size = ape->frames[i].pos - ape->frames[i - 1].pos;
308  ape->frames[i].skip = (ape->frames[i].pos - ape->frames[0].pos) & 3;
309  }
310  ape->frames[ape->totalframes - 1].nblocks = ape->finalframeblocks;
311  /* calculate final packet size from total file size, if available */
312  file_size = avio_size(pb);
313  if (file_size > 0) {
314  final_size = file_size - ape->frames[ape->totalframes - 1].pos -
315  ape->wavtaillength;
316  final_size -= final_size & 3;
317  }
318  if (file_size <= 0 || final_size <= 0)
319  final_size = ape->finalframeblocks * 8;
320  ape->frames[ape->totalframes - 1].size = final_size;
321 
322  for (i = 0; i < ape->totalframes; i++) {
323  if(ape->frames[i].skip){
324  ape->frames[i].pos -= ape->frames[i].skip;
325  ape->frames[i].size += ape->frames[i].skip;
326  }
327  ape->frames[i].size = (ape->frames[i].size + 3) & ~3;
328  }
329  if (ape->fileversion < 3810) {
330  for (i = 0; i < ape->totalframes; i++) {
331  if (i < ape->totalframes - 1 && ape->bittable[i + 1])
332  ape->frames[i].size += 4;
333  ape->frames[i].skip <<= 3;
334  ape->frames[i].skip += ape->bittable[i];
335  }
336  }
337 
338  ape_dumpinfo(s, ape);
339 
340  av_log(s, AV_LOG_VERBOSE, "Decoding file - v%d.%02d, compression level %"PRIu16"\n",
341  ape->fileversion / 1000, (ape->fileversion % 1000) / 10,
342  ape->compressiontype);
343 
344  /* now we are ready: build format streams */
345  st = avformat_new_stream(s, NULL);
346  if (!st)
347  return AVERROR(ENOMEM);
348 
349  total_blocks = (ape->totalframes == 0) ? 0 : ((ape->totalframes - 1) * ape->blocksperframe) + ape->finalframeblocks;
350 
353  st->codecpar->codec_tag = MKTAG('A', 'P', 'E', ' ');
354  st->codecpar->channels = ape->channels;
355  st->codecpar->sample_rate = ape->samplerate;
356  st->codecpar->bits_per_coded_sample = ape->bps;
357 
358  st->nb_frames = ape->totalframes;
359  st->start_time = 0;
360  st->duration = total_blocks;
361  avpriv_set_pts_info(st, 64, 1, ape->samplerate);
362 
364  return AVERROR(ENOMEM);
365  AV_WL16(st->codecpar->extradata + 0, ape->fileversion);
366  AV_WL16(st->codecpar->extradata + 2, ape->compressiontype);
367  AV_WL16(st->codecpar->extradata + 4, ape->formatflags);
368 
369  pts = 0;
370  for (i = 0; i < ape->totalframes; i++) {
371  ape->frames[i].pts = pts;
372  av_add_index_entry(st, ape->frames[i].pos, ape->frames[i].pts, 0, 0, AVINDEX_KEYFRAME);
373  pts += ape->blocksperframe;
374  }
375 
376  /* try to read APE tags */
377  if (pb->seekable) {
378  ff_ape_parse_tag(s);
379  avio_seek(pb, 0, SEEK_SET);
380  }
381 
382  return 0;
383 }
384 
386 {
387  int ret;
388  int nblocks;
389  APEContext *ape = s->priv_data;
390  uint32_t extra_size = 8;
391 
392  if (avio_feof(s->pb))
393  return AVERROR_EOF;
394  if (ape->currentframe >= ape->totalframes)
395  return AVERROR_EOF;
396 
397  if (avio_seek(s->pb, ape->frames[ape->currentframe].pos, SEEK_SET) < 0)
398  return AVERROR(EIO);
399 
400  /* Calculate how many blocks there are in this frame */
401  if (ape->currentframe == (ape->totalframes - 1))
402  nblocks = ape->finalframeblocks;
403  else
404  nblocks = ape->blocksperframe;
405 
406  if (ape->frames[ape->currentframe].size <= 0 ||
407  ape->frames[ape->currentframe].size > INT_MAX - extra_size) {
408  av_log(s, AV_LOG_ERROR, "invalid packet size: %d\n",
409  ape->frames[ape->currentframe].size);
410  ape->currentframe++;
411  return AVERROR(EIO);
412  }
413 
414  if (av_new_packet(pkt, ape->frames[ape->currentframe].size + extra_size) < 0)
415  return AVERROR(ENOMEM);
416 
417  AV_WL32(pkt->data , nblocks);
418  AV_WL32(pkt->data + 4, ape->frames[ape->currentframe].skip);
419  ret = avio_read(s->pb, pkt->data + extra_size, ape->frames[ape->currentframe].size);
420  if (ret < 0) {
421  av_packet_unref(pkt);
422  return ret;
423  }
424 
425  pkt->pts = ape->frames[ape->currentframe].pts;
426  pkt->stream_index = 0;
427 
428  /* note: we need to modify the packet size here to handle the last
429  packet */
430  pkt->size = ret + extra_size;
431 
432  ape->currentframe++;
433 
434  return 0;
435 }
436 
438 {
439  APEContext *ape = s->priv_data;
440 
441  av_freep(&ape->frames);
442  av_freep(&ape->seektable);
443  av_freep(&ape->bittable);
444  return 0;
445 }
446 
447 static int ape_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
448 {
449  AVStream *st = s->streams[stream_index];
450  APEContext *ape = s->priv_data;
451  int index = av_index_search_timestamp(st, timestamp, flags);
452 
453  if (index < 0)
454  return -1;
455 
456  if (avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET) < 0)
457  return -1;
458  ape->currentframe = index;
459  return 0;
460 }
461 
463  .name = "ape",
464  .long_name = NULL_IF_CONFIG_SMALL("Monkey's Audio"),
465  .priv_data_size = sizeof(APEContext),
471  .extensions = "ape,apl,mac",
472 };
uint32_t audiodatalength
Definition: ape.c:67
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:631
static int ape_read_close(AVFormatContext *s)
Definition: ape.c:437
Bytestream IO Context.
Definition: avio.h:111
#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:292
uint32_t wavtaillength
Definition: ape.c:69
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:1900
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:75
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:4405
int64_t pos
Definition: avformat.h:816
#define MAC_FORMAT_FLAG_24_BIT
Definition: ape.c:37
uint32_t wavheaderlength
Definition: ape.c:66
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:3915
int size
Definition: avcodec.h:1578
uint16_t channels
Definition: ape.c:79
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:213
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1085
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:287
int version
Definition: avisynth_c.h:629
static AVPacket pkt
int currentframe
Definition: ape.c:56
uint32_t * seektable
Definition: ape.c:83
char magic[4]
Definition: ape.c:60
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:1319
int16_t fileversion
Definition: ape.c:61
uint8_t
static int ape_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: ape.c:447
static int ape_probe(AVProbeData *p)
Definition: ape.c:87
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4043
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1387
uint32_t seektablelength
Definition: ape.c:65
uint8_t * data
Definition: avcodec.h:1577
uint32_t tag
Definition: movenc.c:1353
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:447
#define MAC_FORMAT_FLAG_8_BIT
Definition: ape.c:34
Decoder context.
Definition: apedec.c:136
uint16_t compressiontype
Definition: ape.c:73
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:550
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:823
int bps
Definition: apedec.c:143
#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:1999
uint32_t samplerate
Definition: ape.c:80
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:672
#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:176
#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:3911
uint8_t md5[16]
Definition: ape.c:70
#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:541
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:461
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:207
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:3105
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:385
uint32_t finalframeblocks
Definition: ape.c:76
int32_t
uint32_t junklength
Definition: ape.c:53
uint16_t formatflags
Definition: ape.c:74
AVInputFormat ff_ape_demuxer
Definition: ape.c:462
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:638
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
uint16_t bps
Definition: ape.c:78
AVIOContext * pb
I/O context.
Definition: avformat.h:1361
uint32_t totalframes
Definition: ape.c:77
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:549
static int ape_read_header(AVFormatContext *s)
Definition: ape.c:162
uint32_t headerlength
Definition: ape.c:64
#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:459
uint8_t * bittable
Definition: ape.c:84
static int64_t pts
Global timestamp for the audio frames.
#define SIZE_SPECIFIER
Definition: internal.h:252
static int flags
Definition: cpu.c:47
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:930
uint32_t descriptorlength
Definition: ape.c:63
int sample_rate
Audio only.
Definition: avcodec.h:4025
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:471
int64_t pts
Definition: ape.c:48
#define APE_MAX_VERSION
Definition: ape.c:32
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:656
Main libavformat public API header.
if(ret< 0)
Definition: vf_mcdeint.c:282
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
Definition: avformat.h:923
#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:932
int eof_reached
true if eof reached
Definition: avio.h:186
void * priv_data
Format private data.
Definition: avformat.h:1347
#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:3957
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3929
int16_t padding1
Definition: ape.c:62
int channels
Audio only.
Definition: avcodec.h:4021
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:660
AVCodecParameters * codecpar
Definition: avformat.h:1006
#define av_malloc_array(a, b)
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:311
int nblocks
Definition: ape.c:45
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3919
int stream_index
Definition: avcodec.h:1579
static void ape_dumpinfo(AVFormatContext *s, APEContext *ape_ctx)
Definition: ape.c:99
#define MKTAG(a, b, c, d)
Definition: common.h:342
uint32_t audiodatalength_high
Definition: ape.c:68
int channels
Definition: apedec.c:141
#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: avcodec.h:1554
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:252
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1570
#define AV_WL32(p, v)
Definition: intreadwrite.h:426