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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  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" %8d (%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, final_size = 0;
168  int64_t pts, file_size;
169 
170  /* Skip any leading junk such as id3v2 tags */
171  ape->junklength = avio_tell(pb);
172 
173  tag = avio_rl32(pb);
174  if (tag != MKTAG('M', 'A', 'C', ' '))
175  return AVERROR_INVALIDDATA;
176 
177  ape->fileversion = avio_rl16(pb);
178 
180  av_log(s, AV_LOG_ERROR, "Unsupported file version - %d.%02d\n",
181  ape->fileversion / 1000, (ape->fileversion % 1000) / 10);
182  return AVERROR_PATCHWELCOME;
183  }
184 
185  if (ape->fileversion >= 3980) {
186  ape->padding1 = avio_rl16(pb);
187  ape->descriptorlength = avio_rl32(pb);
188  ape->headerlength = avio_rl32(pb);
189  ape->seektablelength = avio_rl32(pb);
190  ape->wavheaderlength = avio_rl32(pb);
191  ape->audiodatalength = avio_rl32(pb);
192  ape->audiodatalength_high = avio_rl32(pb);
193  ape->wavtaillength = avio_rl32(pb);
194  avio_read(pb, ape->md5, 16);
195 
196  /* Skip any unknown bytes at the end of the descriptor.
197  This is for future compatibility */
198  if (ape->descriptorlength > 52)
199  avio_skip(pb, ape->descriptorlength - 52);
200 
201  /* Read header data */
202  ape->compressiontype = avio_rl16(pb);
203  ape->formatflags = avio_rl16(pb);
204  ape->blocksperframe = avio_rl32(pb);
205  ape->finalframeblocks = avio_rl32(pb);
206  ape->totalframes = avio_rl32(pb);
207  ape->bps = avio_rl16(pb);
208  ape->channels = avio_rl16(pb);
209  ape->samplerate = avio_rl32(pb);
210  } else {
211  ape->descriptorlength = 0;
212  ape->headerlength = 32;
213 
214  ape->compressiontype = avio_rl16(pb);
215  ape->formatflags = avio_rl16(pb);
216  ape->channels = avio_rl16(pb);
217  ape->samplerate = avio_rl32(pb);
218  ape->wavheaderlength = avio_rl32(pb);
219  ape->wavtaillength = avio_rl32(pb);
220  ape->totalframes = avio_rl32(pb);
221  ape->finalframeblocks = avio_rl32(pb);
222 
224  avio_skip(pb, 4); /* Skip the peak level */
225  ape->headerlength += 4;
226  }
227 
229  ape->seektablelength = avio_rl32(pb);
230  ape->headerlength += 4;
231  ape->seektablelength *= sizeof(int32_t);
232  } else
233  ape->seektablelength = ape->totalframes * sizeof(int32_t);
234 
236  ape->bps = 8;
237  else if (ape->formatflags & MAC_FORMAT_FLAG_24_BIT)
238  ape->bps = 24;
239  else
240  ape->bps = 16;
241 
242  if (ape->fileversion >= 3950)
243  ape->blocksperframe = 73728 * 4;
244  else if (ape->fileversion >= 3900 || (ape->fileversion >= 3800 && ape->compressiontype >= 4000))
245  ape->blocksperframe = 73728;
246  else
247  ape->blocksperframe = 9216;
248 
249  /* Skip any stored wav header */
251  avio_skip(pb, ape->wavheaderlength);
252  }
253 
254  if(!ape->totalframes){
255  av_log(s, AV_LOG_ERROR, "No frames in the file!\n");
256  return AVERROR(EINVAL);
257  }
258  if(ape->totalframes > UINT_MAX / sizeof(APEFrame)){
259  av_log(s, AV_LOG_ERROR, "Too many frames: %"PRIu32"\n",
260  ape->totalframes);
261  return AVERROR_INVALIDDATA;
262  }
263  if (ape->seektablelength / sizeof(*ape->seektable) < ape->totalframes) {
264  av_log(s, AV_LOG_ERROR,
265  "Number of seek entries is less than number of frames: %"SIZE_SPECIFIER" vs. %"PRIu32"\n",
266  ape->seektablelength / sizeof(*ape->seektable), ape->totalframes);
267  return AVERROR_INVALIDDATA;
268  }
269  ape->frames = av_malloc_array(ape->totalframes, sizeof(APEFrame));
270  if(!ape->frames)
271  return AVERROR(ENOMEM);
272  ape->firstframe = ape->junklength + ape->descriptorlength + ape->headerlength + ape->seektablelength + ape->wavheaderlength;
273  if (ape->fileversion < 3810)
274  ape->firstframe += ape->totalframes;
275  ape->currentframe = 0;
276 
277 
278  ape->totalsamples = ape->finalframeblocks;
279  if (ape->totalframes > 1)
280  ape->totalsamples += ape->blocksperframe * (ape->totalframes - 1);
281 
282  if (ape->seektablelength > 0) {
283  ape->seektable = av_mallocz(ape->seektablelength);
284  if (!ape->seektable)
285  return AVERROR(ENOMEM);
286  for (i = 0; i < ape->seektablelength / sizeof(uint32_t) && !pb->eof_reached; i++)
287  ape->seektable[i] = avio_rl32(pb);
288  if (ape->fileversion < 3810) {
289  ape->bittable = av_mallocz(ape->totalframes);
290  if (!ape->bittable)
291  return AVERROR(ENOMEM);
292  for (i = 0; i < ape->totalframes && !pb->eof_reached; i++)
293  ape->bittable[i] = avio_r8(pb);
294  }
295  if (pb->eof_reached)
296  av_log(s, AV_LOG_WARNING, "File truncated\n");
297  }
298 
299  ape->frames[0].pos = ape->firstframe;
300  ape->frames[0].nblocks = ape->blocksperframe;
301  ape->frames[0].skip = 0;
302  for (i = 1; i < ape->totalframes; i++) {
303  ape->frames[i].pos = ape->seektable[i] + ape->junklength;
304  ape->frames[i].nblocks = ape->blocksperframe;
305  ape->frames[i - 1].size = ape->frames[i].pos - ape->frames[i - 1].pos;
306  ape->frames[i].skip = (ape->frames[i].pos - ape->frames[0].pos) & 3;
307  }
308  ape->frames[ape->totalframes - 1].nblocks = ape->finalframeblocks;
309  /* calculate final packet size from total file size, if available */
310  file_size = avio_size(pb);
311  if (file_size > 0) {
312  final_size = file_size - ape->frames[ape->totalframes - 1].pos -
313  ape->wavtaillength;
314  final_size -= final_size & 3;
315  }
316  if (file_size <= 0 || final_size <= 0)
317  final_size = ape->finalframeblocks * 8;
318  ape->frames[ape->totalframes - 1].size = final_size;
319 
320  for (i = 0; i < ape->totalframes; i++) {
321  if(ape->frames[i].skip){
322  ape->frames[i].pos -= ape->frames[i].skip;
323  ape->frames[i].size += ape->frames[i].skip;
324  }
325  ape->frames[i].size = (ape->frames[i].size + 3) & ~3;
326  }
327  if (ape->fileversion < 3810) {
328  for (i = 0; i < ape->totalframes; i++) {
329  if (i < ape->totalframes - 1 && ape->bittable[i + 1])
330  ape->frames[i].size += 4;
331  ape->frames[i].skip <<= 3;
332  ape->frames[i].skip += ape->bittable[i];
333  }
334  }
335 
336  ape_dumpinfo(s, ape);
337 
338  av_log(s, AV_LOG_VERBOSE, "Decoding file - v%d.%02d, compression level %"PRIu16"\n",
339  ape->fileversion / 1000, (ape->fileversion % 1000) / 10,
340  ape->compressiontype);
341 
342  /* now we are ready: build format streams */
343  st = avformat_new_stream(s, NULL);
344  if (!st)
345  return AVERROR(ENOMEM);
346 
347  total_blocks = (ape->totalframes == 0) ? 0 : ((ape->totalframes - 1) * ape->blocksperframe) + ape->finalframeblocks;
348 
351  st->codecpar->codec_tag = MKTAG('A', 'P', 'E', ' ');
352  st->codecpar->channels = ape->channels;
353  st->codecpar->sample_rate = ape->samplerate;
354  st->codecpar->bits_per_coded_sample = ape->bps;
355 
356  st->nb_frames = ape->totalframes;
357  st->start_time = 0;
358  st->duration = total_blocks;
359  avpriv_set_pts_info(st, 64, 1, ape->samplerate);
360 
362  return AVERROR(ENOMEM);
363  AV_WL16(st->codecpar->extradata + 0, ape->fileversion);
364  AV_WL16(st->codecpar->extradata + 2, ape->compressiontype);
365  AV_WL16(st->codecpar->extradata + 4, ape->formatflags);
366 
367  pts = 0;
368  for (i = 0; i < ape->totalframes; i++) {
369  ape->frames[i].pts = pts;
370  av_add_index_entry(st, ape->frames[i].pos, ape->frames[i].pts, 0, 0, AVINDEX_KEYFRAME);
371  pts += ape->blocksperframe;
372  }
373 
374  /* try to read APE tags */
375  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
376  ff_ape_parse_tag(s);
377  avio_seek(pb, 0, SEEK_SET);
378  }
379 
380  return 0;
381 }
382 
384 {
385  int ret;
386  int nblocks;
387  APEContext *ape = s->priv_data;
388  uint32_t extra_size = 8;
389 
390  if (avio_feof(s->pb))
391  return AVERROR_EOF;
392  if (ape->currentframe >= ape->totalframes)
393  return AVERROR_EOF;
394 
395  if (avio_seek(s->pb, ape->frames[ape->currentframe].pos, SEEK_SET) < 0)
396  return AVERROR(EIO);
397 
398  /* Calculate how many blocks there are in this frame */
399  if (ape->currentframe == (ape->totalframes - 1))
400  nblocks = ape->finalframeblocks;
401  else
402  nblocks = ape->blocksperframe;
403 
404  if (ape->frames[ape->currentframe].size <= 0 ||
405  ape->frames[ape->currentframe].size > INT_MAX - extra_size) {
406  av_log(s, AV_LOG_ERROR, "invalid packet size: %d\n",
407  ape->frames[ape->currentframe].size);
408  ape->currentframe++;
409  return AVERROR(EIO);
410  }
411 
412  if (av_new_packet(pkt, ape->frames[ape->currentframe].size + extra_size) < 0)
413  return AVERROR(ENOMEM);
414 
415  AV_WL32(pkt->data , nblocks);
416  AV_WL32(pkt->data + 4, ape->frames[ape->currentframe].skip);
417  ret = avio_read(s->pb, pkt->data + extra_size, ape->frames[ape->currentframe].size);
418  if (ret < 0) {
419  av_packet_unref(pkt);
420  return ret;
421  }
422 
423  pkt->pts = ape->frames[ape->currentframe].pts;
424  pkt->stream_index = 0;
425 
426  /* note: we need to modify the packet size here to handle the last
427  packet */
428  pkt->size = ret + extra_size;
429 
430  ape->currentframe++;
431 
432  return 0;
433 }
434 
436 {
437  APEContext *ape = s->priv_data;
438 
439  av_freep(&ape->frames);
440  av_freep(&ape->seektable);
441  av_freep(&ape->bittable);
442  return 0;
443 }
444 
445 static int ape_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
446 {
447  AVStream *st = s->streams[stream_index];
448  APEContext *ape = s->priv_data;
449  int index = av_index_search_timestamp(st, timestamp, flags);
450 
451  if (index < 0)
452  return -1;
453 
454  if (avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET) < 0)
455  return -1;
456  ape->currentframe = index;
457  return 0;
458 }
459 
461  .name = "ape",
462  .long_name = NULL_IF_CONFIG_SMALL("Monkey's Audio"),
463  .priv_data_size = sizeof(APEContext),
469  .extensions = "ape,apl,mac",
470 };
uint32_t audiodatalength
Definition: ape.c:66
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:768
static int ape_read_close(AVFormatContext *s)
Definition: ape.c:435
Bytestream IO Context.
Definition: avio.h:155
#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:323
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:1979
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:4727
int64_t pos
Definition: avformat.h:820
#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:4074
int size
Definition: avcodec.h:1658
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:235
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1092
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:318
int version
Definition: avisynth_c.h:766
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:222
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:1349
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:445
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:4357
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1417
uint32_t seektablelength
Definition: ape.c:64
uint8_t * data
Definition: avcodec.h:1657
static int flags
Definition: log.c:57
uint32_t tag
Definition: movenc.c:1446
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:527
#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:621
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:827
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:2088
uint32_t samplerate
Definition: ape.c:79
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:743
#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:179
#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:4070
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:612
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:463
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:251
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:3212
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:383
uint32_t finalframeblocks
Definition: ape.c:75
int32_t
uint32_t junklength
Definition: ape.c:53
uint16_t formatflags
Definition: ape.c:73
AVInputFormat ff_ape_demuxer
Definition: ape.c:460
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:509
Definition: ape.c:43
Stream structure.
Definition: avformat.h:889
#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:1391
uint32_t totalframes
Definition: ape.c:76
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:576
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:461
uint8_t * bittable
Definition: ape.c:83
static int64_t pts
Global timestamp for the audio frames.
#define SIZE_SPECIFIER
Definition: internal.h:255
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:946
uint32_t descriptorlength
Definition: ape.c:62
int sample_rate
Audio only.
Definition: avcodec.h:4184
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:473
int64_t pts
Definition: ape.c:48
#define APE_MAX_VERSION
Definition: ape.c:32
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:727
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:936
#define AV_WL16(p, v)
Definition: intreadwrite.h:417
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:948
int eof_reached
true if eof reached
Definition: avio.h:230
void * priv_data
Format private data.
Definition: avformat.h:1377
#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:4116
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:4088
int16_t padding1
Definition: ape.c:61
int channels
Audio only.
Definition: avcodec.h:4180
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:664
AVCodecParameters * codecpar
Definition: avformat.h:1252
#define av_malloc_array(a, b)
int avio_feof(AVIOContext *s)
feof() equivalent for AVIOContext.
Definition: aviobuf.c:345
int nblocks
Definition: ape.c:45
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:4078
int stream_index
Definition: avcodec.h:1659
static void ape_dumpinfo(AVFormatContext *s, APEContext *ape_ctx)
Definition: ape.c:98
#define MKTAG(a, b, c, d)
Definition: common.h:342
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
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1634
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1650
#define AV_WL32(p, v)
Definition: intreadwrite.h:431