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 } APEContext;
81 
82 static int ape_probe(const AVProbeData * p)
83 {
84  int version = AV_RL16(p->buf+4);
85  if (AV_RL32(p->buf) != MKTAG('M', 'A', 'C', ' '))
86  return 0;
87 
88  if (version < APE_MIN_VERSION || version > APE_MAX_VERSION)
89  return AVPROBE_SCORE_MAX/4;
90 
91  return AVPROBE_SCORE_MAX;
92 }
93 
94 static void ape_dumpinfo(AVFormatContext * s, APEContext * ape_ctx)
95 {
96 #ifdef DEBUG
97  int i;
98 
99  av_log(s, AV_LOG_DEBUG, "Descriptor Block:\n\n");
100  av_log(s, AV_LOG_DEBUG, "fileversion = %"PRId16"\n", ape_ctx->fileversion);
101  av_log(s, AV_LOG_DEBUG, "descriptorlength = %"PRIu32"\n", ape_ctx->descriptorlength);
102  av_log(s, AV_LOG_DEBUG, "headerlength = %"PRIu32"\n", ape_ctx->headerlength);
103  av_log(s, AV_LOG_DEBUG, "seektablelength = %"PRIu32"\n", ape_ctx->seektablelength);
104  av_log(s, AV_LOG_DEBUG, "wavheaderlength = %"PRIu32"\n", ape_ctx->wavheaderlength);
105  av_log(s, AV_LOG_DEBUG, "audiodatalength = %"PRIu32"\n", ape_ctx->audiodatalength);
106  av_log(s, AV_LOG_DEBUG, "audiodatalength_high = %"PRIu32"\n", ape_ctx->audiodatalength_high);
107  av_log(s, AV_LOG_DEBUG, "wavtaillength = %"PRIu32"\n", ape_ctx->wavtaillength);
108  av_log(s, AV_LOG_DEBUG, "md5 = ");
109  for (i = 0; i < 16; i++)
110  av_log(s, AV_LOG_DEBUG, "%02x", ape_ctx->md5[i]);
111  av_log(s, AV_LOG_DEBUG, "\n");
112 
113  av_log(s, AV_LOG_DEBUG, "\nHeader Block:\n\n");
114 
115  av_log(s, AV_LOG_DEBUG, "compressiontype = %"PRIu16"\n", ape_ctx->compressiontype);
116  av_log(s, AV_LOG_DEBUG, "formatflags = %"PRIu16"\n", ape_ctx->formatflags);
117  av_log(s, AV_LOG_DEBUG, "blocksperframe = %"PRIu32"\n", ape_ctx->blocksperframe);
118  av_log(s, AV_LOG_DEBUG, "finalframeblocks = %"PRIu32"\n", ape_ctx->finalframeblocks);
119  av_log(s, AV_LOG_DEBUG, "totalframes = %"PRIu32"\n", ape_ctx->totalframes);
120  av_log(s, AV_LOG_DEBUG, "bps = %"PRIu16"\n", ape_ctx->bps);
121  av_log(s, AV_LOG_DEBUG, "channels = %"PRIu16"\n", ape_ctx->channels);
122  av_log(s, AV_LOG_DEBUG, "samplerate = %"PRIu32"\n", ape_ctx->samplerate);
123 
124  av_log(s, AV_LOG_DEBUG, "\nSeektable\n\n");
125  if ((ape_ctx->seektablelength / sizeof(uint32_t)) != ape_ctx->totalframes) {
126  av_log(s, AV_LOG_DEBUG, "No seektable\n");
127  }
128 
129  av_log(s, AV_LOG_DEBUG, "\nFrames\n\n");
130  for (i = 0; i < ape_ctx->totalframes; i++)
131  av_log(s, AV_LOG_DEBUG, "%8d %8"PRId64" %8d (%d samples)\n", i,
132  ape_ctx->frames[i].pos, ape_ctx->frames[i].size,
133  ape_ctx->frames[i].nblocks);
134 
135  av_log(s, AV_LOG_DEBUG, "\nCalculated information:\n\n");
136  av_log(s, AV_LOG_DEBUG, "junklength = %"PRIu32"\n", ape_ctx->junklength);
137  av_log(s, AV_LOG_DEBUG, "firstframe = %"PRIu32"\n", ape_ctx->firstframe);
138  av_log(s, AV_LOG_DEBUG, "totalsamples = %"PRIu32"\n", ape_ctx->totalsamples);
139 #endif
140 }
141 
142 static int ape_read_header(AVFormatContext * s)
143 {
144  AVIOContext *pb = s->pb;
145  APEContext *ape = s->priv_data;
146  AVStream *st;
147  uint32_t tag;
148  int i, ret;
149  int total_blocks, final_size = 0;
150  int64_t pts, file_size;
151 
152  /* Skip any leading junk such as id3v2 tags */
153  ape->junklength = avio_tell(pb);
154 
155  tag = avio_rl32(pb);
156  if (tag != MKTAG('M', 'A', 'C', ' '))
157  return AVERROR_INVALIDDATA;
158 
159  ape->fileversion = avio_rl16(pb);
160 
161  if (ape->fileversion < APE_MIN_VERSION || ape->fileversion > APE_MAX_VERSION) {
162  av_log(s, AV_LOG_ERROR, "Unsupported file version - %d.%02d\n",
163  ape->fileversion / 1000, (ape->fileversion % 1000) / 10);
164  return AVERROR_PATCHWELCOME;
165  }
166 
167  if (ape->fileversion >= 3980) {
168  ape->padding1 = avio_rl16(pb);
169  ape->descriptorlength = avio_rl32(pb);
170  ape->headerlength = avio_rl32(pb);
171  ape->seektablelength = avio_rl32(pb);
172  ape->wavheaderlength = avio_rl32(pb);
173  ape->audiodatalength = avio_rl32(pb);
174  ape->audiodatalength_high = avio_rl32(pb);
175  ape->wavtaillength = avio_rl32(pb);
176  avio_read(pb, ape->md5, 16);
177 
178  /* Skip any unknown bytes at the end of the descriptor.
179  This is for future compatibility */
180  if (ape->descriptorlength > 52)
181  avio_skip(pb, ape->descriptorlength - 52);
182 
183  /* Read header data */
184  ape->compressiontype = avio_rl16(pb);
185  ape->formatflags = avio_rl16(pb);
186  ape->blocksperframe = avio_rl32(pb);
187  ape->finalframeblocks = avio_rl32(pb);
188  ape->totalframes = avio_rl32(pb);
189  ape->bps = avio_rl16(pb);
190  ape->channels = avio_rl16(pb);
191  ape->samplerate = avio_rl32(pb);
192  } else {
193  ape->descriptorlength = 0;
194  ape->headerlength = 32;
195 
196  ape->compressiontype = avio_rl16(pb);
197  ape->formatflags = avio_rl16(pb);
198  ape->channels = avio_rl16(pb);
199  ape->samplerate = avio_rl32(pb);
200  ape->wavheaderlength = avio_rl32(pb);
201  ape->wavtaillength = avio_rl32(pb);
202  ape->totalframes = avio_rl32(pb);
203  ape->finalframeblocks = avio_rl32(pb);
204 
205  if (ape->formatflags & MAC_FORMAT_FLAG_HAS_PEAK_LEVEL) {
206  avio_skip(pb, 4); /* Skip the peak level */
207  ape->headerlength += 4;
208  }
209 
210  if (ape->formatflags & MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS) {
211  ape->seektablelength = avio_rl32(pb);
212  ape->headerlength += 4;
213  ape->seektablelength *= sizeof(int32_t);
214  } else
215  ape->seektablelength = ape->totalframes * sizeof(int32_t);
216 
217  if (ape->formatflags & MAC_FORMAT_FLAG_8_BIT)
218  ape->bps = 8;
219  else if (ape->formatflags & MAC_FORMAT_FLAG_24_BIT)
220  ape->bps = 24;
221  else
222  ape->bps = 16;
223 
224  if (ape->fileversion >= 3950)
225  ape->blocksperframe = 73728 * 4;
226  else if (ape->fileversion >= 3900 || (ape->fileversion >= 3800 && ape->compressiontype >= 4000))
227  ape->blocksperframe = 73728;
228  else
229  ape->blocksperframe = 9216;
230 
231  /* Skip any stored wav header */
232  if (!(ape->formatflags & MAC_FORMAT_FLAG_CREATE_WAV_HEADER))
233  avio_skip(pb, ape->wavheaderlength);
234  }
235 
236  if(!ape->totalframes || pb->eof_reached){
237  av_log(s, AV_LOG_ERROR, "No frames in the file!\n");
238  return AVERROR(EINVAL);
239  }
240  if(ape->totalframes > UINT_MAX / sizeof(APEFrame)){
241  av_log(s, AV_LOG_ERROR, "Too many frames: %"PRIu32"\n",
242  ape->totalframes);
243  return AVERROR_INVALIDDATA;
244  }
245  if (ape->seektablelength / sizeof(uint32_t) < ape->totalframes) {
246  av_log(s, AV_LOG_ERROR,
247  "Number of seek entries is less than number of frames: %"SIZE_SPECIFIER" vs. %"PRIu32"\n",
248  ape->seektablelength / sizeof(uint32_t), ape->totalframes);
249  return AVERROR_INVALIDDATA;
250  }
251  ape->frames = av_malloc_array(ape->totalframes, sizeof(APEFrame));
252  if(!ape->frames)
253  return AVERROR(ENOMEM);
254  ape->firstframe = ape->junklength + ape->descriptorlength + ape->headerlength + ape->seektablelength + ape->wavheaderlength;
255  if (ape->fileversion < 3810)
256  ape->firstframe += ape->totalframes;
257  ape->currentframe = 0;
258 
259 
260  ape->totalsamples = ape->finalframeblocks;
261  if (ape->totalframes > 1)
262  ape->totalsamples += ape->blocksperframe * (ape->totalframes - 1);
263 
264  ape->frames[0].pos = ape->firstframe;
265  ape->frames[0].nblocks = ape->blocksperframe;
266  ape->frames[0].skip = 0;
267  avio_rl32(pb); // seektable[0]
268  for (i = 1; i < ape->totalframes; i++) {
269  uint32_t seektable_entry = avio_rl32(pb);
270  ape->frames[i].pos = seektable_entry + ape->junklength;
271  ape->frames[i].nblocks = ape->blocksperframe;
272  ape->frames[i - 1].size = ape->frames[i].pos - ape->frames[i - 1].pos;
273  ape->frames[i].skip = (ape->frames[i].pos - ape->frames[0].pos) & 3;
274 
275  if (pb->eof_reached) {
276  av_log(s, AV_LOG_ERROR, "seektable truncated\n");
277  return AVERROR_INVALIDDATA;
278  }
279  ff_dlog(s, "seektable: %8d %"PRIu32"\n", i, seektable_entry);
280  }
281  avio_skip(pb, ape->seektablelength / sizeof(uint32_t) - ape->totalframes);
282 
283  ape->frames[ape->totalframes - 1].nblocks = ape->finalframeblocks;
284  /* calculate final packet size from total file size, if available */
285  file_size = avio_size(pb);
286  if (file_size > 0) {
287  final_size = file_size - ape->frames[ape->totalframes - 1].pos -
288  ape->wavtaillength;
289  final_size -= final_size & 3;
290  }
291  if (file_size <= 0 || final_size <= 0)
292  final_size = ape->finalframeblocks * 8;
293  ape->frames[ape->totalframes - 1].size = final_size;
294 
295  for (i = 0; i < ape->totalframes; i++) {
296  if(ape->frames[i].skip){
297  ape->frames[i].pos -= ape->frames[i].skip;
298  ape->frames[i].size += ape->frames[i].skip;
299  }
300  ape->frames[i].size = (ape->frames[i].size + 3) & ~3;
301  }
302  if (ape->fileversion < 3810) {
303  for (i = 0; i < ape->totalframes; i++) {
304  int bits = avio_r8(pb);
305  if (i && bits)
306  ape->frames[i - 1].size += 4;
307 
308  ape->frames[i].skip <<= 3;
309  ape->frames[i].skip += bits;
310  ff_dlog(s, "bittable: %2d\n", bits);
311  if (pb->eof_reached) {
312  av_log(s, AV_LOG_ERROR, "bittable truncated\n");
313  return AVERROR_INVALIDDATA;
314  }
315  }
316  }
317 
318  ape_dumpinfo(s, ape);
319 
320  av_log(s, AV_LOG_VERBOSE, "Decoding file - v%d.%02d, compression level %"PRIu16"\n",
321  ape->fileversion / 1000, (ape->fileversion % 1000) / 10,
322  ape->compressiontype);
323 
324  /* now we are ready: build format streams */
325  st = avformat_new_stream(s, NULL);
326  if (!st)
327  return AVERROR(ENOMEM);
328 
329  total_blocks = (ape->totalframes == 0) ? 0 : ((ape->totalframes - 1) * ape->blocksperframe) + ape->finalframeblocks;
330 
331  st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
332  st->codecpar->codec_id = AV_CODEC_ID_APE;
333  st->codecpar->codec_tag = MKTAG('A', 'P', 'E', ' ');
334  st->codecpar->channels = ape->channels;
335  st->codecpar->sample_rate = ape->samplerate;
336  st->codecpar->bits_per_coded_sample = ape->bps;
337 
338  st->nb_frames = ape->totalframes;
339  st->start_time = 0;
340  st->duration = total_blocks;
341  avpriv_set_pts_info(st, 64, 1, ape->samplerate);
342 
343  if ((ret = ff_alloc_extradata(st->codecpar, APE_EXTRADATA_SIZE)) < 0)
344  return ret;
345  AV_WL16(st->codecpar->extradata + 0, ape->fileversion);
346  AV_WL16(st->codecpar->extradata + 2, ape->compressiontype);
347  AV_WL16(st->codecpar->extradata + 4, ape->formatflags);
348 
349  pts = 0;
350  for (i = 0; i < ape->totalframes; i++) {
351  ape->frames[i].pts = pts;
352  av_add_index_entry(st, ape->frames[i].pos, ape->frames[i].pts, 0, 0, AVINDEX_KEYFRAME);
353  pts += ape->blocksperframe;
354  }
355 
356  /* try to read APE tags */
357  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
358  ff_ape_parse_tag(s);
359  avio_seek(pb, 0, SEEK_SET);
360  }
361 
362  return 0;
363 }
364 
365 static int ape_read_packet(AVFormatContext * s, AVPacket * pkt)
366 {
367  int ret;
368  int nblocks;
369  APEContext *ape = s->priv_data;
370  uint32_t extra_size = 8;
371  int64_t ret64;
372 
373  if (avio_feof(s->pb))
374  return AVERROR_EOF;
375  if (ape->currentframe >= ape->totalframes)
376  return AVERROR_EOF;
377 
378  ret64 = avio_seek(s->pb, ape->frames[ape->currentframe].pos, SEEK_SET);
379  if (ret64 < 0)
380  return ret64;
381 
382  /* Calculate how many blocks there are in this frame */
383  if (ape->currentframe == (ape->totalframes - 1))
384  nblocks = ape->finalframeblocks;
385  else
386  nblocks = ape->blocksperframe;
387 
388  if (ape->frames[ape->currentframe].size <= 0 ||
389  ape->frames[ape->currentframe].size > INT_MAX - extra_size) {
390  av_log(s, AV_LOG_ERROR, "invalid packet size: %d\n",
391  ape->frames[ape->currentframe].size);
392  ape->currentframe++;
393  return AVERROR(EIO);
394  }
395 
396  ret = av_new_packet(pkt, ape->frames[ape->currentframe].size + extra_size);
397  if (ret < 0)
398  return ret;
399 
400  AV_WL32(pkt->data , nblocks);
401  AV_WL32(pkt->data + 4, ape->frames[ape->currentframe].skip);
402  ret = avio_read(s->pb, pkt->data + extra_size, ape->frames[ape->currentframe].size);
403  if (ret < 0) {
404  return ret;
405  }
406 
407  pkt->pts = ape->frames[ape->currentframe].pts;
408  pkt->stream_index = 0;
409 
410  /* note: we need to modify the packet size here to handle the last
411  packet */
412  pkt->size = ret + extra_size;
413 
414  ape->currentframe++;
415 
416  return 0;
417 }
418 
419 static int ape_read_close(AVFormatContext * s)
420 {
421  APEContext *ape = s->priv_data;
422 
423  av_freep(&ape->frames);
424  return 0;
425 }
426 
427 static int ape_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
428 {
429  AVStream *st = s->streams[stream_index];
430  APEContext *ape = s->priv_data;
431  int index = av_index_search_timestamp(st, timestamp, flags);
432  int64_t ret;
433 
434  if (index < 0)
435  return -1;
436 
437  if ((ret = avio_seek(s->pb, ffstream(st)->index_entries[index].pos, SEEK_SET)) < 0)
438  return ret;
439  ape->currentframe = index;
440  return 0;
441 }
442 
443 const AVInputFormat ff_ape_demuxer = {
444  .name = "ape",
445  .long_name = NULL_IF_CONFIG_SMALL("Monkey's Audio"),
446  .priv_data_size = sizeof(APEContext),
447  .flags_internal = FF_FMT_INIT_CLEANUP,
448  .read_probe = ape_probe,
449  .read_header = ape_read_header,
450  .read_packet = ape_read_packet,
451  .read_close = ape_read_close,
452  .read_seek = ape_read_seek,
453  .extensions = "ape,apl,mac",
454 };
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
FF_FMT_INIT_CLEANUP
#define FF_FMT_INIT_CLEANUP
For an AVInputFormat with this flag set read_close() needs to be called by the caller upon read_heade...
Definition: internal.h:49
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:768
AV_CODEC_ID_APE
@ AV_CODEC_ID_APE
Definition: codec_id.h:455
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:57
APEFrame::skip
int skip
Definition: ape.c:47
APEContext::totalsamples
uint32_t totalsamples
Definition: ape.c:55
apetag.h
index
fg index
Definition: ffmpeg_filter.c:167
APEFrame::size
int size
Definition: ape.c:46
AVPacket::data
uint8_t * data
Definition: packet.h:373
APEContext::fileversion
int16_t fileversion
Definition: ape.c:60
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:196
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:82
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:352
ff_ape_parse_tag
int64_t ff_ape_parse_tag(AVFormatContext *s)
Read and parse an APE tag.
Definition: apetag.c:108
APEContext::audiodatalength
uint32_t audiodatalength
Definition: ape.c:66
AVINDEX_KEYFRAME
#define AVINDEX_KEYFRAME
Definition: avformat.h:809
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:459
APEContext::firstframe
uint32_t firstframe
Definition: ape.c:54
AVCodecParameters::channels
int channels
Audio only.
Definition: codec_par.h:166
ffstream
static av_always_inline FFStream * ffstream(AVStream *st)
Definition: internal.h:432
APEContext::fileversion
int fileversion
codec version, very important in decoding process
Definition: apedec.c:161
read_seek
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:149
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: seek.c:117
read_close
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:141
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:504
pts
static int64_t pts
Definition: transcode_aac.c:653
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:985
APEContext::compressiontype
uint16_t compressiontype
Definition: ape.c:72
avio_rl16
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:743
pkt
AVPacket * pkt
Definition: movenc.c:59
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
AVInputFormat
Definition: avformat.h:650
ff_ape_demuxer
const AVInputFormat ff_ape_demuxer
Definition: ape.c:443
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:99
APEContext::junklength
uint32_t junklength
Definition: ape.c:53
ape_dumpinfo
static void ape_dumpinfo(AVFormatContext *s, APEContext *ape_ctx)
Definition: ape.c:94
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:655
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:449
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
bits
uint8_t bits
Definition: vp3data.h:141
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
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:94
MAC_FORMAT_FLAG_24_BIT
#define MAC_FORMAT_FLAG_24_BIT
Definition: ape.c:37
if
if(ret)
Definition: filter_design.txt:179
AVFormatContext
Format I/O context.
Definition: avformat.h:1200
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1095
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:64
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:447
APEContext::md5
uint8_t md5[16]
Definition: ape.c:69
APEContext
Decoder context.
Definition: apedec.c:152
APEContext::wavtaillength
uint32_t wavtaillength
Definition: ape.c:68
APEFrame::nblocks
int nblocks
Definition: ape.c:45
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:987
ff_dlog
#define ff_dlog(a,...)
Definition: tableprint_vlc.h:29
avio_rl32
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:759
AVIOContext
Bytestream IO Context.
Definition: avio.h:161
AVPacket::size
int size
Definition: packet.h:374
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:117
AVIOContext::seekable
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:262
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:632
ape_read_header
static int ape_read_header(AVFormatContext *s)
Definition: ape.c:142
version
version
Definition: libkvazaar.c:313
APE_MIN_VERSION
#define APE_MIN_VERSION
Definition: ape.c:31
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:271
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:366
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
APEFrame
Definition: ape.c:43
ape_read_packet
static int ape_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: ape.c:365
tag
uint32_t tag
Definition: movenc.c:1596
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:935
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:260
APEContext::samplerate
uint32_t samplerate
Definition: ape.c:79
APE_MAX_VERSION
#define APE_MAX_VERSION
Definition: ape.c:32
pos
unsigned int pos
Definition: spdifenc.c:412
avformat.h
ape_read_close
static int ape_read_close(AVFormatContext *s)
Definition: ape.c:419
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:92
SIZE_SPECIFIER
#define SIZE_SPECIFIER
Definition: internal.h:193
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:157
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:641
AVIOContext::eof_reached
int eof_reached
true if was unable to read due to error or eof
Definition: avio.h:239
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *st, 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:1196
AVPacket::stream_index
int stream_index
Definition: packet.h:375
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:347
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:159
ape_read_seek
static int ape_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: ape.c:427
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:350
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
int32_t
int32_t
Definition: audioconvert.c:56
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
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:61
MKTAG
#define MKTAG(a, b, c, d)
Definition: macros.h:55
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:975
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: seek.c:237
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:451
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:375
APEContext::frames
APEFrame * frames
Definition: ape.c:57
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