FFmpeg
ape.c
Go to the documentation of this file.
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 "libavutil/mem.h"
27 #include "avformat.h"
28 #include "demux.h"
29 #include "internal.h"
30 #include "apetag.h"
31 
32 /* The earliest and latest file formats supported by this library */
33 #define APE_MIN_VERSION 3800
34 #define APE_MAX_VERSION 3990
35 
36 #define MAC_FORMAT_FLAG_8_BIT 1 // is 8-bit [OBSOLETE]
37 #define MAC_FORMAT_FLAG_CRC 2 // uses the new CRC32 error detection [OBSOLETE]
38 #define MAC_FORMAT_FLAG_HAS_PEAK_LEVEL 4 // uint32 nPeakLevel after the header [OBSOLETE]
39 #define MAC_FORMAT_FLAG_24_BIT 8 // is 24-bit [OBSOLETE]
40 #define MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS 16 // has the number of seek elements after the peak level
41 #define MAC_FORMAT_FLAG_CREATE_WAV_HEADER 32 // create the wave header on decompression (not stored)
42 
43 #define APE_EXTRADATA_SIZE 6
44 
45 typedef struct APEFrame {
46  int64_t pos;
47  int64_t size;
48  int nblocks;
49  int skip;
50  int64_t pts;
51 } APEFrame;
52 
53 typedef struct APEContext {
54  /* Derived fields */
55  uint32_t junklength;
56  uint32_t firstframe;
57  uint32_t totalsamples;
58  int currentframe;
59  APEFrame *frames;
60 
61  /* Info from Descriptor Block */
62  int16_t fileversion;
63  int16_t padding1;
64  uint32_t descriptorlength;
65  uint32_t headerlength;
66  uint32_t seektablelength;
67  uint32_t wavheaderlength;
68  uint32_t audiodatalength;
69  uint32_t audiodatalength_high;
70  uint32_t wavtaillength;
71  uint8_t md5[16];
72 
73  /* Info from Header Block */
74  uint16_t compressiontype;
75  uint16_t formatflags;
76  uint32_t blocksperframe;
77  uint32_t finalframeblocks;
78  uint32_t totalframes;
79  uint16_t bps;
80  uint16_t channels;
81  uint32_t samplerate;
82 } APEContext;
83 
84 static int ape_probe(const AVProbeData * p)
85 {
86  int version = AV_RL16(p->buf+4);
87  if (AV_RL32(p->buf) != MKTAG('M', 'A', 'C', ' '))
88  return 0;
89 
90  if (version < APE_MIN_VERSION || version > APE_MAX_VERSION)
91  return AVPROBE_SCORE_MAX/4;
92 
93  return AVPROBE_SCORE_MAX;
94 }
95 
96 static void ape_dumpinfo(AVFormatContext * s, APEContext * ape_ctx)
97 {
98 #ifdef DEBUG
99  int i;
100 
101  av_log(s, AV_LOG_DEBUG, "Descriptor Block:\n\n");
102  av_log(s, AV_LOG_DEBUG, "fileversion = %"PRId16"\n", ape_ctx->fileversion);
103  av_log(s, AV_LOG_DEBUG, "descriptorlength = %"PRIu32"\n", ape_ctx->descriptorlength);
104  av_log(s, AV_LOG_DEBUG, "headerlength = %"PRIu32"\n", ape_ctx->headerlength);
105  av_log(s, AV_LOG_DEBUG, "seektablelength = %"PRIu32"\n", ape_ctx->seektablelength);
106  av_log(s, AV_LOG_DEBUG, "wavheaderlength = %"PRIu32"\n", ape_ctx->wavheaderlength);
107  av_log(s, AV_LOG_DEBUG, "audiodatalength = %"PRIu32"\n", ape_ctx->audiodatalength);
108  av_log(s, AV_LOG_DEBUG, "audiodatalength_high = %"PRIu32"\n", ape_ctx->audiodatalength_high);
109  av_log(s, AV_LOG_DEBUG, "wavtaillength = %"PRIu32"\n", ape_ctx->wavtaillength);
110  av_log(s, AV_LOG_DEBUG, "md5 = ");
111  for (i = 0; i < 16; i++)
112  av_log(s, AV_LOG_DEBUG, "%02x", ape_ctx->md5[i]);
113  av_log(s, AV_LOG_DEBUG, "\n");
114 
115  av_log(s, AV_LOG_DEBUG, "\nHeader Block:\n\n");
116 
117  av_log(s, AV_LOG_DEBUG, "compressiontype = %"PRIu16"\n", ape_ctx->compressiontype);
118  av_log(s, AV_LOG_DEBUG, "formatflags = %"PRIu16"\n", ape_ctx->formatflags);
119  av_log(s, AV_LOG_DEBUG, "blocksperframe = %"PRIu32"\n", ape_ctx->blocksperframe);
120  av_log(s, AV_LOG_DEBUG, "finalframeblocks = %"PRIu32"\n", ape_ctx->finalframeblocks);
121  av_log(s, AV_LOG_DEBUG, "totalframes = %"PRIu32"\n", ape_ctx->totalframes);
122  av_log(s, AV_LOG_DEBUG, "bps = %"PRIu16"\n", ape_ctx->bps);
123  av_log(s, AV_LOG_DEBUG, "channels = %"PRIu16"\n", ape_ctx->channels);
124  av_log(s, AV_LOG_DEBUG, "samplerate = %"PRIu32"\n", ape_ctx->samplerate);
125 
126  av_log(s, AV_LOG_DEBUG, "\nSeektable\n\n");
127  if ((ape_ctx->seektablelength / sizeof(uint32_t)) != ape_ctx->totalframes) {
128  av_log(s, AV_LOG_DEBUG, "No seektable\n");
129  }
130 
131  av_log(s, AV_LOG_DEBUG, "\nFrames\n\n");
132  for (i = 0; i < ape_ctx->totalframes; i++)
133  av_log(s, AV_LOG_DEBUG, "%8d %8"PRId64" %8"PRId64" (%d samples)\n", i,
134  ape_ctx->frames[i].pos, ape_ctx->frames[i].size,
135  ape_ctx->frames[i].nblocks);
136 
137  av_log(s, AV_LOG_DEBUG, "\nCalculated information:\n\n");
138  av_log(s, AV_LOG_DEBUG, "junklength = %"PRIu32"\n", ape_ctx->junklength);
139  av_log(s, AV_LOG_DEBUG, "firstframe = %"PRIu32"\n", ape_ctx->firstframe);
140  av_log(s, AV_LOG_DEBUG, "totalsamples = %"PRIu32"\n", ape_ctx->totalsamples);
141 #endif
142 }
143 
144 static int ape_read_header(AVFormatContext * s)
145 {
146  AVIOContext *pb = s->pb;
147  APEContext *ape = s->priv_data;
148  AVStream *st;
149  uint32_t tag;
150  int i, ret;
151  int64_t total_blocks;
152  int64_t final_size = 0;
153  int64_t pts, file_size;
154 
155  /* Skip any leading junk such as id3v2 tags */
156  ape->junklength = avio_tell(pb);
157 
158  tag = avio_rl32(pb);
159  if (tag != MKTAG('M', 'A', 'C', ' '))
160  return AVERROR_INVALIDDATA;
161 
162  ape->fileversion = avio_rl16(pb);
163 
164  if (ape->fileversion < APE_MIN_VERSION || ape->fileversion > APE_MAX_VERSION) {
165  av_log(s, AV_LOG_ERROR, "Unsupported file version - %d.%02d\n",
166  ape->fileversion / 1000, (ape->fileversion % 1000) / 10);
167  return AVERROR_PATCHWELCOME;
168  }
169 
170  if (ape->fileversion >= 3980) {
171  ape->padding1 = avio_rl16(pb);
172  ape->descriptorlength = avio_rl32(pb);
173  ape->headerlength = avio_rl32(pb);
174  ape->seektablelength = avio_rl32(pb);
175  ape->wavheaderlength = avio_rl32(pb);
176  ape->audiodatalength = avio_rl32(pb);
177  ape->audiodatalength_high = avio_rl32(pb);
178  ape->wavtaillength = avio_rl32(pb);
179  avio_read(pb, ape->md5, 16);
180 
181  /* Skip any unknown bytes at the end of the descriptor.
182  This is for future compatibility */
183  if (ape->descriptorlength > 52)
184  avio_skip(pb, ape->descriptorlength - 52);
185 
186  /* Read header data */
187  ape->compressiontype = avio_rl16(pb);
188  ape->formatflags = avio_rl16(pb);
189  ape->blocksperframe = avio_rl32(pb);
190  ape->finalframeblocks = avio_rl32(pb);
191  ape->totalframes = avio_rl32(pb);
192  ape->bps = avio_rl16(pb);
193  ape->channels = avio_rl16(pb);
194  ape->samplerate = avio_rl32(pb);
195  } else {
196  ape->descriptorlength = 0;
197  ape->headerlength = 32;
198 
199  ape->compressiontype = avio_rl16(pb);
200  ape->formatflags = avio_rl16(pb);
201  ape->channels = avio_rl16(pb);
202  ape->samplerate = avio_rl32(pb);
203  ape->wavheaderlength = avio_rl32(pb);
204  ape->wavtaillength = avio_rl32(pb);
205  ape->totalframes = avio_rl32(pb);
206  ape->finalframeblocks = avio_rl32(pb);
207 
208  if (ape->formatflags & MAC_FORMAT_FLAG_HAS_PEAK_LEVEL) {
209  avio_skip(pb, 4); /* Skip the peak level */
210  ape->headerlength += 4;
211  }
212 
213  if (ape->formatflags & MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS) {
214  ape->seektablelength = avio_rl32(pb);
215  ape->headerlength += 4;
216  ape->seektablelength *= sizeof(int32_t);
217  } else
218  ape->seektablelength = ape->totalframes * sizeof(int32_t);
219 
220  if (ape->formatflags & MAC_FORMAT_FLAG_8_BIT)
221  ape->bps = 8;
222  else if (ape->formatflags & MAC_FORMAT_FLAG_24_BIT)
223  ape->bps = 24;
224  else
225  ape->bps = 16;
226 
227  if (ape->fileversion >= 3950)
228  ape->blocksperframe = 73728 * 4;
229  else if (ape->fileversion >= 3900 || (ape->fileversion >= 3800 && ape->compressiontype >= 4000))
230  ape->blocksperframe = 73728;
231  else
232  ape->blocksperframe = 9216;
233 
234  /* Skip any stored wav header */
235  if (!(ape->formatflags & MAC_FORMAT_FLAG_CREATE_WAV_HEADER))
236  avio_skip(pb, ape->wavheaderlength);
237  }
238 
239  if(!ape->totalframes || pb->eof_reached){
240  av_log(s, AV_LOG_ERROR, "No frames in the file!\n");
241  return AVERROR(EINVAL);
242  }
243  if(ape->totalframes > UINT_MAX / sizeof(APEFrame)){
244  av_log(s, AV_LOG_ERROR, "Too many frames: %"PRIu32"\n",
245  ape->totalframes);
246  return AVERROR_INVALIDDATA;
247  }
248  if (ape->seektablelength / sizeof(uint32_t) < ape->totalframes) {
249  av_log(s, AV_LOG_ERROR,
250  "Number of seek entries is less than number of frames: %"SIZE_SPECIFIER" vs. %"PRIu32"\n",
251  ape->seektablelength / sizeof(uint32_t), ape->totalframes);
252  return AVERROR_INVALIDDATA;
253  }
254  ape->frames = av_malloc_array(ape->totalframes, sizeof(APEFrame));
255  if(!ape->frames)
256  return AVERROR(ENOMEM);
257  ape->firstframe = ape->junklength + ape->descriptorlength + ape->headerlength + ape->seektablelength + ape->wavheaderlength;
258  if (ape->fileversion < 3810)
259  ape->firstframe += ape->totalframes;
260  ape->currentframe = 0;
261 
262 
263  ape->totalsamples = ape->finalframeblocks;
264  if (ape->totalframes > 1)
265  ape->totalsamples += ape->blocksperframe * (ape->totalframes - 1);
266 
267  ape->frames[0].pos = ape->firstframe;
268  ape->frames[0].nblocks = ape->blocksperframe;
269  ape->frames[0].skip = 0;
270  avio_rl32(pb); // seektable[0]
271  for (i = 1; i < ape->totalframes; i++) {
272  uint32_t seektable_entry = avio_rl32(pb);
273  ape->frames[i].pos = seektable_entry + ape->junklength;
274  ape->frames[i].nblocks = ape->blocksperframe;
275  ape->frames[i - 1].size = ape->frames[i].pos - ape->frames[i - 1].pos;
276  ape->frames[i].skip = (ape->frames[i].pos - ape->frames[0].pos) & 3;
277 
278  if (pb->eof_reached) {
279  av_log(s, AV_LOG_ERROR, "seektable truncated\n");
280  return AVERROR_INVALIDDATA;
281  }
282  ff_dlog(s, "seektable: %8d %"PRIu32"\n", i, seektable_entry);
283  }
284  avio_skip(pb, ape->seektablelength / sizeof(uint32_t) - ape->totalframes);
285 
286  ape->frames[ape->totalframes - 1].nblocks = ape->finalframeblocks;
287  /* calculate final packet size from total file size, if available */
288  file_size = avio_size(pb);
289  if (file_size > 0) {
290  final_size = file_size - ape->frames[ape->totalframes - 1].pos -
291  ape->wavtaillength;
292  final_size -= final_size & 3;
293  }
294  if (file_size <= 0 || final_size <= 0)
295  final_size = ape->finalframeblocks * 8LL;
296  ape->frames[ape->totalframes - 1].size = final_size;
297 
298  for (i = 0; i < ape->totalframes; i++) {
299  if(ape->frames[i].skip){
300  ape->frames[i].pos -= ape->frames[i].skip;
301  ape->frames[i].size += ape->frames[i].skip;
302  }
303  if (ape->frames[i].size > INT_MAX - 3)
304  return AVERROR_INVALIDDATA;
305  ape->frames[i].size = (ape->frames[i].size + 3) & ~3;
306  }
307  if (ape->fileversion < 3810) {
308  for (i = 0; i < ape->totalframes; i++) {
309  int bits = avio_r8(pb);
310  if (i && bits)
311  ape->frames[i - 1].size += 4;
312 
313  ape->frames[i].skip <<= 3;
314  ape->frames[i].skip += bits;
315  ff_dlog(s, "bittable: %2d\n", bits);
316  if (pb->eof_reached) {
317  av_log(s, AV_LOG_ERROR, "bittable truncated\n");
318  return AVERROR_INVALIDDATA;
319  }
320  }
321  }
322 
323  ape_dumpinfo(s, ape);
324 
325  av_log(s, AV_LOG_VERBOSE, "Decoding file - v%d.%02d, compression level %"PRIu16"\n",
326  ape->fileversion / 1000, (ape->fileversion % 1000) / 10,
327  ape->compressiontype);
328 
329  /* now we are ready: build format streams */
330  st = avformat_new_stream(s, NULL);
331  if (!st)
332  return AVERROR(ENOMEM);
333 
334  total_blocks = (ape->totalframes == 0) ? 0 : ((int64_t)(ape->totalframes - 1) * ape->blocksperframe) + ape->finalframeblocks;
335 
336  st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
337  st->codecpar->codec_id = AV_CODEC_ID_APE;
338  st->codecpar->codec_tag = MKTAG('A', 'P', 'E', ' ');
339  st->codecpar->ch_layout.nb_channels = ape->channels;
340  st->codecpar->sample_rate = ape->samplerate;
341  st->codecpar->bits_per_coded_sample = ape->bps;
342 
343  st->nb_frames = ape->totalframes;
344  st->start_time = 0;
345  st->duration = total_blocks;
346  avpriv_set_pts_info(st, 64, 1, ape->samplerate);
347 
348  if ((ret = ff_alloc_extradata(st->codecpar, APE_EXTRADATA_SIZE)) < 0)
349  return ret;
350  AV_WL16(st->codecpar->extradata + 0, ape->fileversion);
351  AV_WL16(st->codecpar->extradata + 2, ape->compressiontype);
352  AV_WL16(st->codecpar->extradata + 4, ape->formatflags);
353 
354  pts = 0;
355  for (i = 0; i < ape->totalframes; i++) {
356  ape->frames[i].pts = pts;
357  av_add_index_entry(st, ape->frames[i].pos, ape->frames[i].pts, 0, 0, AVINDEX_KEYFRAME);
358  pts += ape->blocksperframe;
359  }
360 
361  /* try to read APE tags */
362  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
363  ff_ape_parse_tag(s);
364  avio_seek(pb, 0, SEEK_SET);
365  }
366 
367  return 0;
368 }
369 
370 static int ape_read_packet(AVFormatContext * s, AVPacket * pkt)
371 {
372  int ret;
373  int nblocks;
374  APEContext *ape = s->priv_data;
375  uint32_t extra_size = 8;
376  int64_t ret64;
377 
378  if (avio_feof(s->pb))
379  return AVERROR_EOF;
380  if (ape->currentframe >= ape->totalframes)
381  return AVERROR_EOF;
382 
383  ret64 = avio_seek(s->pb, ape->frames[ape->currentframe].pos, SEEK_SET);
384  if (ret64 < 0)
385  return ret64;
386 
387  /* Calculate how many blocks there are in this frame */
388  if (ape->currentframe == (ape->totalframes - 1))
389  nblocks = ape->finalframeblocks;
390  else
391  nblocks = ape->blocksperframe;
392 
393  if (ape->frames[ape->currentframe].size <= 0 ||
394  ape->frames[ape->currentframe].size > INT_MAX - extra_size) {
395  av_log(s, AV_LOG_ERROR, "invalid packet size: %8"PRId64"\n",
396  ape->frames[ape->currentframe].size);
397  ape->currentframe++;
398  return AVERROR(EIO);
399  }
400 
401  ret = av_new_packet(pkt, ape->frames[ape->currentframe].size + extra_size);
402  if (ret < 0)
403  return ret;
404 
405  AV_WL32(pkt->data , nblocks);
406  AV_WL32(pkt->data + 4, ape->frames[ape->currentframe].skip);
407  ret = avio_read(s->pb, pkt->data + extra_size, ape->frames[ape->currentframe].size);
408  if (ret < 0) {
409  return ret;
410  }
411 
412  pkt->pts = ape->frames[ape->currentframe].pts;
413  pkt->stream_index = 0;
414 
415  /* note: we need to modify the packet size here to handle the last
416  packet */
417  pkt->size = ret + extra_size;
418  pkt->duration = nblocks;
419 
420  ape->currentframe++;
421 
422  return 0;
423 }
424 
425 static int ape_read_close(AVFormatContext * s)
426 {
427  APEContext *ape = s->priv_data;
428 
429  av_freep(&ape->frames);
430  return 0;
431 }
432 
433 static int ape_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
434 {
435  AVStream *st = s->streams[stream_index];
436  APEContext *ape = s->priv_data;
437  int index = av_index_search_timestamp(st, timestamp, flags);
438  int64_t ret;
439 
440  if (index < 0)
441  return -1;
442 
443  if ((ret = avio_seek(s->pb, ffstream(st)->index_entries[index].pos, SEEK_SET)) < 0)
444  return ret;
445  ape->currentframe = index;
446  return 0;
447 }
448 
449 const FFInputFormat ff_ape_demuxer = {
450  .p.name = "ape",
451  .p.long_name = NULL_IF_CONFIG_SMALL("Monkey's Audio"),
452  .p.extensions = "ape,apl,mac",
453  .priv_data_size = sizeof(APEContext),
454  .flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
455  .read_probe = ape_probe,
456  .read_header = ape_read_header,
457  .read_packet = ape_read_packet,
458  .read_close = ape_read_close,
459  .read_seek = ape_read_seek,
460 };
MAC_FORMAT_FLAG_CREATE_WAV_HEADER
#define MAC_FORMAT_FLAG_CREATE_WAV_HEADER
Definition: ape.c:41
flags
const SwsFlags flags[]
Definition: swscale.c:61
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:69
MAC_FORMAT_FLAG_HAS_PEAK_LEVEL
#define MAC_FORMAT_FLAG_HAS_PEAK_LEVEL
Definition: ape.c:38
APEContext::wavheaderlength
uint32_t wavheaderlength
Definition: ape.c:67
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
AV_CODEC_ID_APE
@ AV_CODEC_ID_APE
Definition: codec_id.h:482
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:51
AV_WL32
#define AV_WL32(p, v)
Definition: intreadwrite.h:422
APEContext::finalframeblocks
uint32_t finalframeblocks
Definition: ape.c:77
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const struct AVCodec *c)
Add a new stream to a media file.
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
APEFrame::skip
int skip
Definition: ape.c:49
int64_t
long long int64_t
Definition: coverity.c:34
APEContext::totalsamples
uint32_t totalsamples
Definition: ape.c:57
apetag.h
AVPacket::data
uint8_t * data
Definition: packet.h:546
APEContext::fileversion
int16_t fileversion
Definition: ape.c:62
AV_LOG_VERBOSE
#define AV_LOG_VERBOSE
Detailed information.
Definition: log.h:226
MAC_FORMAT_FLAG_8_BIT
#define MAC_FORMAT_FLAG_8_BIT
Definition: ape.c:36
ape_probe
static int ape_probe(const AVProbeData *p)
Definition: ape.c:84
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:564
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:59
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:329
avio_size
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:323
ff_ape_parse_tag
int64_t ff_ape_parse_tag(AVFormatContext *s)
Read and parse an APE tag.
Definition: apetag.c:110
APEContext::audiodatalength
uint32_t audiodatalength
Definition: ape.c:68
AVINDEX_KEYFRAME
#define AVINDEX_KEYFRAME
Definition: avformat.h:606
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:463
APEContext::firstframe
uint32_t firstframe
Definition: ape.c:56
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: avformat.c:777
ffstream
static av_always_inline FFStream * ffstream(AVStream *st)
Definition: internal.h:347
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:151
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:122
read_close
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:143
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:494
pts
static int64_t pts
Definition: transcode_aac.c:644
APEContext::blocksperframe
uint32_t blocksperframe
Definition: ape.c:76
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:803
APEContext::compressiontype
uint16_t compressiontype
Definition: ape.c:74
avio_rl16
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:714
pkt
AVPacket * pkt
Definition: movenc.c:60
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:210
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_read_callback.c:42
APEContext::audiodatalength_high
uint32_t audiodatalength_high
Definition: ape.c:69
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:198
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: packet.c:99
APEContext::junklength
uint32_t junklength
Definition: ape.c:55
ape_dumpinfo
static void ape_dumpinfo(AVFormatContext *s, APEContext *ape_ctx)
Definition: ape.c:96
APEContext::currentframe
int currentframe
Definition: ape.c:58
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:549
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:453
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:201
bits
uint8_t bits
Definition: vp3data.h:128
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:231
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:39
if
if(ret)
Definition: filter_design.txt:179
FF_INFMT_FLAG_INIT_CLEANUP
#define FF_INFMT_FLAG_INIT_CLEANUP
For an FFInputFormat with this flag set read_close() needs to be called by the caller upon read_heade...
Definition: demux.h:35
AVFormatContext
Format I/O context.
Definition: avformat.h:1264
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:767
APEContext::formatflags
uint16_t formatflags
Definition: ape.c:75
NULL
#define NULL
Definition: coverity.c:32
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:64
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:451
APEContext::md5
uint8_t md5[16]
Definition: ape.c:71
APEContext
Decoder context.
Definition: apedec.c:152
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
Audio only.
Definition: codec_par.h:180
APEContext::wavtaillength
uint32_t wavtaillength
Definition: ape.c:70
APEFrame::nblocks
int nblocks
Definition: ape.c:48
index
int index
Definition: gxfenc.c:90
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:184
AVStream::nb_frames
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:805
ff_dlog
#define ff_dlog(a,...)
Definition: tableprint_vlc.h:28
avio_rl32
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:730
AVIOContext
Bytestream IO Context.
Definition: avio.h:160
AVPacket::size
int size
Definition: packet.h:547
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:94
AVIOContext::seekable
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:261
APE_EXTRADATA_SIZE
#define APE_EXTRADATA_SIZE
Definition: ape.c:43
FFInputFormat::p
AVInputFormat p
The public AVInputFormat.
Definition: demux.h:46
AV_WL16
#define AV_WL16(p, v)
Definition: intreadwrite.h:408
APEContext::channels
uint16_t channels
Definition: ape.c:80
avio_r8
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:603
ape_read_header
static int ape_read_header(AVFormatContext *s)
Definition: ape.c:144
read_header
static int read_header(FFV1Context *f, RangeCoder *c)
Definition: ffv1dec.c:489
version
version
Definition: libkvazaar.c:315
APE_MIN_VERSION
#define APE_MIN_VERSION
Definition: ape.c:33
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:539
APEContext::totalframes
uint32_t totalframes
Definition: ape.c:78
av_malloc_array
#define av_malloc_array(a, b)
Definition: tableprint_vlc.h:32
APEContext::bps
uint16_t bps
Definition: ape.c:79
demux.h
APEFrame
Definition: ape.c:45
ape_read_packet
static int ape_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: ape.c:370
tag
uint32_t tag
Definition: movenc.c:1907
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:744
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:231
APEContext::samplerate
uint32_t samplerate
Definition: ape.c:81
APE_MAX_VERSION
#define APE_MAX_VERSION
Definition: ape.c:34
APEFrame::size
int64_t size
Definition: ape.c:47
pos
unsigned int pos
Definition: spdifenc.c:414
avformat.h
ape_read_close
static int ape_read_close(AVFormatContext *s)
Definition: ape.c:425
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:92
SIZE_SPECIFIER
#define SIZE_SPECIFIER
Definition: internal.h:129
APEFrame::pts
int64_t pts
Definition: ape.c:50
AVIO_SEEKABLE_NORMAL
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:41
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:612
ff_ape_demuxer
const FFInputFormat ff_ape_demuxer
Definition: ape.c:449
AVIOContext::eof_reached
int eof_reached
true if was unable to read due to error or eof
Definition: avio.h:238
AVPacket::stream_index
int stream_index
Definition: packet.h:548
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:318
APEContext::headerlength
uint32_t headerlength
Definition: ape.c:65
MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS
#define MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS
Definition: ape.c:40
read_probe
static int read_probe(const AVProbeData *p)
Definition: cdg.c:30
APEFrame::pos
int64_t pos
Definition: ape.c:46
AVCodecParameters::bits_per_coded_sample
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:110
mem.h
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:433
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:55
AVPacket
This structure stores compressed data.
Definition: packet.h:523
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
FFInputFormat
Definition: demux.h:42
int32_t
int32_t
Definition: audioconvert.c:56
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
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:793
APEContext::padding1
int16_t padding1
Definition: ape.c:63
APEContext::seektablelength
uint32_t seektablelength
Definition: ape.c:66
APEContext::descriptorlength
uint32_t descriptorlength
Definition: ape.c:64
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:245
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:230
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:346
APEContext::frames
APEFrame * frames
Definition: ape.c:59
Generated on Sun Jul 6 2025 19:22:57 for FFmpeg by   doxygen 1.8.17