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;
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(const 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
static int ape_read_close(AVFormatContext *s)
Definition: ape.c:435
Bytestream IO Context.
Definition: avio.h:161
#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:339
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:2049
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:4929
int64_t pos
Definition: avformat.h:810
#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:3968
int size
Definition: avcodec.h:1481
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:246
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: avformat.h:1110
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:334
int version
Definition: avisynth_c.h:858
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:236
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:1358
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
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4502
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1426
uint32_t seektablelength
Definition: ape.c:64
struct AVMD5 * md5
Definition: movenc.c:56
static int ape_probe(const AVProbeData *p)
Definition: ape.c:86
uint8_t * data
Definition: avcodec.h:1480
uint32_t tag
Definition: movenc.c:1531
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:557
#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:650
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:817
int bps
Definition: apedec.c:143
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
#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:2164
uint32_t samplerate
Definition: ape.c:79
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:772
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
#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:3964
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:641
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:448
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:260
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:3321
int64_t pos
Definition: ape.c:44
static int ape_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: ape.c:383
uint32_t finalframeblocks
Definition: ape.c:75
int32_t
#define s(width, name)
Definition: cbs_vp9.c:257
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:530
if(ret)
Definition: ape.c:43
Stream structure.
Definition: avformat.h:881
#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:1400
uint32_t totalframes
Definition: ape.c:76
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
Definition: avpacket.c:599
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:446
uint8_t * bittable
Definition: ape.c:83
#define SIZE_SPECIFIER
Definition: internal.h:262
#define flags(name, subs,...)
Definition: cbs_av1.c:561
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:930
uint32_t descriptorlength
Definition: ape.c:62
int sample_rate
Audio only.
Definition: avcodec.h:4078
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:458
int64_t pts
Definition: ape.c:48
#define APE_MAX_VERSION
Definition: ape.c:32
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:756
Main libavformat public API header.
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
Definition: avformat.h:920
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:932
int eof_reached
true if was unable to read due to error or eof
Definition: avio.h:239
void * priv_data
Format private data.
Definition: avformat.h:1386
#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:4010
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3982
int16_t padding1
Definition: ape.c:61
int channels
Audio only.
Definition: avcodec.h:4074
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:654
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1028
#define av_malloc_array(a, b)
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:361
int nblocks
Definition: ape.c:45
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3972
int stream_index
Definition: avcodec.h:1482
static void ape_dumpinfo(AVFormatContext *s, APEContext *ape_ctx)
Definition: ape.c:98
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
#define MKTAG(a, b, c, d)
Definition: common.h:366
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:1457
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1473
#define AV_WL32(p, v)
Definition: intreadwrite.h:426