FFmpeg
ape.c
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1 /*
2  * Monkey's Audio APE demuxer
3  * Copyright (c) 2007 Benjamin Zores <ben@geexbox.org>
4  * based upon libdemac from Dave Chapman.
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include <stdio.h>
24 
25 #include "libavutil/intreadwrite.h"
26 #include "avformat.h"
27 #include "internal.h"
28 #include "apetag.h"
29 
30 /* The earliest and latest file formats supported by this library */
31 #define APE_MIN_VERSION 3800
32 #define APE_MAX_VERSION 3990
33 
34 #define MAC_FORMAT_FLAG_8_BIT 1 // is 8-bit [OBSOLETE]
35 #define MAC_FORMAT_FLAG_CRC 2 // uses the new CRC32 error detection [OBSOLETE]
36 #define MAC_FORMAT_FLAG_HAS_PEAK_LEVEL 4 // uint32 nPeakLevel after the header [OBSOLETE]
37 #define MAC_FORMAT_FLAG_24_BIT 8 // is 24-bit [OBSOLETE]
38 #define MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS 16 // has the number of seek elements after the peak level
39 #define MAC_FORMAT_FLAG_CREATE_WAV_HEADER 32 // create the wave header on decompression (not stored)
40 
41 #define APE_EXTRADATA_SIZE 6
42 
43 typedef struct APEFrame {
44  int64_t pos;
45  int nblocks;
46  int size;
47  int skip;
48  int64_t pts;
49 } APEFrame;
50 
51 typedef struct APEContext {
52  /* Derived fields */
53  uint32_t junklength;
54  uint32_t firstframe;
55  uint32_t totalsamples;
56  int currentframe;
57  APEFrame *frames;
58 
59  /* Info from Descriptor Block */
60  int16_t fileversion;
61  int16_t padding1;
62  uint32_t descriptorlength;
63  uint32_t headerlength;
64  uint32_t seektablelength;
65  uint32_t wavheaderlength;
66  uint32_t audiodatalength;
67  uint32_t audiodatalength_high;
68  uint32_t wavtaillength;
69  uint8_t md5[16];
70 
71  /* Info from Header Block */
72  uint16_t compressiontype;
73  uint16_t formatflags;
74  uint32_t blocksperframe;
75  uint32_t finalframeblocks;
76  uint32_t totalframes;
77  uint16_t bps;
78  uint16_t channels;
79  uint32_t samplerate;
80 
81  /* Seektable */
82  uint32_t *seektable;
83  uint8_t *bittable;
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 
162 static int ape_read_header(AVFormatContext * s)
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 
181  if (ape->fileversion < APE_MIN_VERSION || ape->fileversion > APE_MAX_VERSION) {
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 
225  if (ape->formatflags & MAC_FORMAT_FLAG_HAS_PEAK_LEVEL) {
226  avio_skip(pb, 4); /* Skip the peak level */
227  ape->headerlength += 4;
228  }
229 
230  if (ape->formatflags & MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS) {
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 
237  if (ape->formatflags & MAC_FORMAT_FLAG_8_BIT)
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 */
252  if (!(ape->formatflags & MAC_FORMAT_FLAG_CREATE_WAV_HEADER))
253  avio_skip(pb, ape->wavheaderlength);
254  }
255 
256  if(!ape->totalframes || pb->eof_reached){
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_ERROR, "File truncated\n");
303  ret = AVERROR_INVALIDDATA;
304  goto fail;
305  }
306  }
307 
308  ape->frames[0].pos = ape->firstframe;
309  ape->frames[0].nblocks = ape->blocksperframe;
310  ape->frames[0].skip = 0;
311  for (i = 1; i < ape->totalframes; i++) {
312  ape->frames[i].pos = ape->seektable[i] + ape->junklength;
313  ape->frames[i].nblocks = ape->blocksperframe;
314  ape->frames[i - 1].size = ape->frames[i].pos - ape->frames[i - 1].pos;
315  ape->frames[i].skip = (ape->frames[i].pos - ape->frames[0].pos) & 3;
316  }
317  ape->frames[ape->totalframes - 1].nblocks = ape->finalframeblocks;
318  /* calculate final packet size from total file size, if available */
319  file_size = avio_size(pb);
320  if (file_size > 0) {
321  final_size = file_size - ape->frames[ape->totalframes - 1].pos -
322  ape->wavtaillength;
323  final_size -= final_size & 3;
324  }
325  if (file_size <= 0 || final_size <= 0)
326  final_size = ape->finalframeblocks * 8;
327  ape->frames[ape->totalframes - 1].size = final_size;
328 
329  for (i = 0; i < ape->totalframes; i++) {
330  if(ape->frames[i].skip){
331  ape->frames[i].pos -= ape->frames[i].skip;
332  ape->frames[i].size += ape->frames[i].skip;
333  }
334  ape->frames[i].size = (ape->frames[i].size + 3) & ~3;
335  }
336  if (ape->fileversion < 3810) {
337  for (i = 0; i < ape->totalframes; i++) {
338  if (i < ape->totalframes - 1 && ape->bittable[i + 1])
339  ape->frames[i].size += 4;
340  ape->frames[i].skip <<= 3;
341  ape->frames[i].skip += ape->bittable[i];
342  }
343  }
344 
345  ape_dumpinfo(s, ape);
346 
347  av_log(s, AV_LOG_VERBOSE, "Decoding file - v%d.%02d, compression level %"PRIu16"\n",
348  ape->fileversion / 1000, (ape->fileversion % 1000) / 10,
349  ape->compressiontype);
350 
351  /* now we are ready: build format streams */
352  st = avformat_new_stream(s, NULL);
353  if (!st) {
354  ret = AVERROR(ENOMEM);
355  goto fail;
356  }
357 
358  total_blocks = (ape->totalframes == 0) ? 0 : ((ape->totalframes - 1) * ape->blocksperframe) + ape->finalframeblocks;
359 
360  st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
361  st->codecpar->codec_id = AV_CODEC_ID_APE;
362  st->codecpar->codec_tag = MKTAG('A', 'P', 'E', ' ');
363  st->codecpar->channels = ape->channels;
364  st->codecpar->sample_rate = ape->samplerate;
365  st->codecpar->bits_per_coded_sample = ape->bps;
366 
367  st->nb_frames = ape->totalframes;
368  st->start_time = 0;
369  st->duration = total_blocks;
370  avpriv_set_pts_info(st, 64, 1, ape->samplerate);
371 
372  if ((ret = ff_alloc_extradata(st->codecpar, APE_EXTRADATA_SIZE)) < 0)
373  goto fail;
374  AV_WL16(st->codecpar->extradata + 0, ape->fileversion);
375  AV_WL16(st->codecpar->extradata + 2, ape->compressiontype);
376  AV_WL16(st->codecpar->extradata + 4, ape->formatflags);
377 
378  pts = 0;
379  for (i = 0; i < ape->totalframes; i++) {
380  ape->frames[i].pts = pts;
381  av_add_index_entry(st, ape->frames[i].pos, ape->frames[i].pts, 0, 0, AVINDEX_KEYFRAME);
382  pts += ape->blocksperframe;
383  }
384 
385  /* try to read APE tags */
386  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
387  ff_ape_parse_tag(s);
388  avio_seek(pb, 0, SEEK_SET);
389  }
390 
391  return 0;
392 fail:
393  ape_read_close(s);
394 
395  return ret;
396 }
397 
398 static int ape_read_packet(AVFormatContext * s, AVPacket * pkt)
399 {
400  int ret;
401  int nblocks;
402  APEContext *ape = s->priv_data;
403  uint32_t extra_size = 8;
404  int64_t ret64;
405 
406  if (avio_feof(s->pb))
407  return AVERROR_EOF;
408  if (ape->currentframe >= ape->totalframes)
409  return AVERROR_EOF;
410 
411  ret64 = avio_seek(s->pb, ape->frames[ape->currentframe].pos, SEEK_SET);
412  if (ret64 < 0)
413  return ret64;
414 
415  /* Calculate how many blocks there are in this frame */
416  if (ape->currentframe == (ape->totalframes - 1))
417  nblocks = ape->finalframeblocks;
418  else
419  nblocks = ape->blocksperframe;
420 
421  if (ape->frames[ape->currentframe].size <= 0 ||
422  ape->frames[ape->currentframe].size > INT_MAX - extra_size) {
423  av_log(s, AV_LOG_ERROR, "invalid packet size: %d\n",
424  ape->frames[ape->currentframe].size);
425  ape->currentframe++;
426  return AVERROR(EIO);
427  }
428 
429  ret = av_new_packet(pkt, ape->frames[ape->currentframe].size + extra_size);
430  if (ret < 0)
431  return ret;
432 
433  AV_WL32(pkt->data , nblocks);
434  AV_WL32(pkt->data + 4, ape->frames[ape->currentframe].skip);
435  ret = avio_read(s->pb, pkt->data + extra_size, ape->frames[ape->currentframe].size);
436  if (ret < 0) {
437  return ret;
438  }
439 
440  pkt->pts = ape->frames[ape->currentframe].pts;
441  pkt->stream_index = 0;
442 
443  /* note: we need to modify the packet size here to handle the last
444  packet */
445  pkt->size = ret + extra_size;
446 
447  ape->currentframe++;
448 
449  return 0;
450 }
451 
452 static int ape_read_close(AVFormatContext * s)
453 {
454  APEContext *ape = s->priv_data;
455 
456  av_freep(&ape->frames);
457  av_freep(&ape->seektable);
458  av_freep(&ape->bittable);
459  return 0;
460 }
461 
462 static int ape_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
463 {
464  AVStream *st = s->streams[stream_index];
465  APEContext *ape = s->priv_data;
466  int index = av_index_search_timestamp(st, timestamp, flags);
467  int64_t ret;
468 
469  if (index < 0)
470  return -1;
471 
472  if ((ret = avio_seek(s->pb, st->index_entries[index].pos, SEEK_SET)) < 0)
473  return ret;
474  ape->currentframe = index;
475  return 0;
476 }
477 
478 AVInputFormat ff_ape_demuxer = {
479  .name = "ape",
480  .long_name = NULL_IF_CONFIG_SMALL("Monkey's Audio"),
481  .priv_data_size = sizeof(APEContext),
482  .read_probe = ape_probe,
483  .read_header = ape_read_header,
484  .read_packet = ape_read_packet,
485  .read_close = ape_read_close,
486  .read_seek = ape_read_seek,
487  .extensions = "ape,apl,mac",
488 };
AVStream::index_entries
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1094
MAC_FORMAT_FLAG_CREATE_WAV_HEADER
#define MAC_FORMAT_FLAG_CREATE_WAV_HEADER
Definition: ape.c:39
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:74
MAC_FORMAT_FLAG_HAS_PEAK_LEVEL
#define MAC_FORMAT_FLAG_HAS_PEAK_LEVEL
Definition: ape.c:36
APEContext::wavheaderlength
uint32_t wavheaderlength
Definition: ape.c:65
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4526
AV_CODEC_ID_APE
@ AV_CODEC_ID_APE
Definition: codec_id.h:442
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
AV_WL32
#define AV_WL32(p, v)
Definition: intreadwrite.h:426
APEContext::finalframeblocks
uint32_t finalframeblocks
Definition: ape.c:75
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:55
MKTAG
#define MKTAG(a, b, c, d)
Definition: common.h:406
APEFrame::skip
int skip
Definition: ape.c:47
APEContext::totalsamples
uint32_t totalsamples
Definition: ape.c:55
apetag.h
APEFrame::size
int size
Definition: ape.c:46
AVPacket::data
uint8_t * data
Definition: packet.h:355
APEContext::fileversion
int16_t fileversion
Definition: ape.c:60
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:192
MAC_FORMAT_FLAG_8_BIT
#define MAC_FORMAT_FLAG_8_BIT
Definition: ape.c:34
ape_probe
static int ape_probe(const AVProbeData *p)
Definition: ape.c:88
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:64
avio_size
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:334
ff_ape_parse_tag
int64_t ff_ape_parse_tag(AVFormatContext *s)
Read and parse an APE tag.
Definition: apetag.c:118
APEContext::audiodatalength
uint32_t audiodatalength
Definition: ape.c:66
AVINDEX_KEYFRAME
#define AVINDEX_KEYFRAME
Definition: avformat.h:803
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
APEContext::firstframe
uint32_t firstframe
Definition: ape.c:54
AVCodecParameters::channels
int channels
Audio only.
Definition: codec_par.h:166
fail
#define fail()
Definition: checkasm.h:123
APEContext::fileversion
int fileversion
codec version, very important in decoding process
Definition: apedec.c:146
read_seek
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
av_add_index_entry
int av_add_index_entry(AVStream *st, int64_t pos, int64_t timestamp, int size, int distance, int flags)
Add an index entry into a sorted list.
Definition: utils.c:2052
read_close
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
pts
static int64_t pts
Definition: transcode_aac.c:647
APEContext::blocksperframe
uint32_t blocksperframe
Definition: ape.c:74
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:914
APEContext::compressiontype
uint16_t compressiontype
Definition: ape.c:72
avio_rl16
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:731
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVInputFormat
Definition: avformat.h:636
APEContext::audiodatalength_high
uint32_t audiodatalength_high
Definition: ape.c:67
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:257
av_new_packet
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:88
APEContext::junklength
uint32_t junklength
Definition: ape.c:53
ape_dumpinfo
static void ape_dumpinfo(AVFormatContext *s, APEContext *ape_ctx)
Definition: ape.c:100
APEContext::currentframe
int currentframe
Definition: ape.c:56
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:641
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
AV_RL16
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:90
MAC_FORMAT_FLAG_24_BIT
#define MAC_FORMAT_FLAG_24_BIT
Definition: ape.c:37
int32_t
int32_t
Definition: audio_convert.c:194
if
if(ret)
Definition: filter_design.txt:179
AVFormatContext
Format I/O context.
Definition: avformat.h:1335
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1012
APEContext::formatflags
uint16_t formatflags
Definition: ape.c:73
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
NULL
#define NULL
Definition: coverity.c:32
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
read_probe
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
APEContext::md5
uint8_t md5[16]
Definition: ape.c:69
APEContext
Decoder context.
Definition: apedec.c:137
APEContext::wavtaillength
uint32_t wavtaillength
Definition: ape.c:68
APEFrame::nblocks
int nblocks
Definition: ape.c:45
index
int index
Definition: gxfenc.c:89
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:170
AVStream::nb_frames
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:916
avio_rl32
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:747
AVIOContext
Bytestream IO Context.
Definition: avio.h:161
AVPacket::size
int size
Definition: packet.h:356
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:188
AVIOContext::seekable
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4948
APE_EXTRADATA_SIZE
#define APE_EXTRADATA_SIZE
Definition: ape.c:41
AV_WL16
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
APEContext::channels
uint16_t channels
Definition: ape.c:78
avio_r8
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:616
ape_read_header
static int ape_read_header(AVFormatContext *s)
Definition: ape.c:162
version
version
Definition: libkvazaar.c:292
APE_MIN_VERSION
#define APE_MIN_VERSION
Definition: ape.c:31
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:348
APEContext::totalframes
uint32_t totalframes
Definition: ape.c:76
av_malloc_array
#define av_malloc_array(a, b)
Definition: tableprint_vlc.h:32
APEContext::bps
uint16_t bps
Definition: ape.c:77
uint8_t
uint8_t
Definition: audio_convert.c:194
av_mallocz
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
APEContext::bittable
uint8_t * bittable
Definition: ape.c:83
APEFrame
Definition: ape.c:43
ape_read_packet
static int ape_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: ape.c:398
tag
uint32_t tag
Definition: movenc.c:1532
ret
ret
Definition: filter_design.txt:187
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
AVStream
Stream structure.
Definition: avformat.h:865
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:241
APEContext::samplerate
uint32_t samplerate
Definition: ape.c:79
ff_ape_demuxer
AVInputFormat ff_ape_demuxer
Definition: ape.c:478
APE_MAX_VERSION
#define APE_MAX_VERSION
Definition: ape.c:32
avformat.h
ape_read_close
static int ape_read_close(AVFormatContext *s)
Definition: ape.c:452
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:88
SIZE_SPECIFIER
#define SIZE_SPECIFIER
Definition: internal.h:264
pkt
static AVPacket pkt
Definition: demuxing_decoding.c:54
APEFrame::pts
int64_t pts
Definition: ape.c:48
AVIO_SEEKABLE_NORMAL
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
APEContext::channels
int channels
Definition: apedec.c:142
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:625
AVIndexEntry::pos
int64_t pos
Definition: avformat.h:796
AVIOContext::eof_reached
int eof_reached
true if was unable to read due to error or eof
Definition: avio.h:239
AVPacket::stream_index
int stream_index
Definition: packet.h:357
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:329
APEContext::headerlength
uint32_t headerlength
Definition: ape.c:63
MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS
#define MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS
Definition: ape.c:38
APEFrame::pos
int64_t pos
Definition: ape.c:44
AVCodecParameters::bits_per_coded_sample
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:102
APEContext::bps
int bps
Definition: apedec.c:144
ape_read_seek
static int ape_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: ape.c:462
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
AVPacket
This structure stores compressed data.
Definition: packet.h:332
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:565
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
AVStream::start_time
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base.
Definition: avformat.h:904
APEContext::seektable
uint32_t * seektable
Definition: ape.c:82
APEContext::padding1
int16_t padding1
Definition: ape.c:61
APEContext::seektablelength
uint32_t seektablelength
Definition: ape.c:64
APEContext::descriptorlength
uint32_t descriptorlength
Definition: ape.c:62
av_index_search_timestamp
int av_index_search_timestamp(AVStream *st, int64_t timestamp, int flags)
Get the index for a specific timestamp.
Definition: utils.c:2169
ff_alloc_extradata
int ff_alloc_extradata(AVCodecParameters *par, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0.
Definition: utils.c:3328
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:356
APEContext::frames
APEFrame * frames
Definition: ape.c:57
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