FFmpeg
mpc8.c
Go to the documentation of this file.
1 /*
2  * Musepack SV8 demuxer
3  * Copyright (c) 2007 Konstantin Shishkov
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavcodec/get_bits.h"
23 #include "libavcodec/unary.h"
24 #include "apetag.h"
25 #include "avformat.h"
26 #include "demux.h"
27 #include "internal.h"
28 #include "avio_internal.h"
29 
30 /// Two-byte MPC tag
31 #define MKMPCTAG(a, b) ((a) | ((b) << 8))
32 
33 #define TAG_MPCK MKTAG('M','P','C','K')
34 
35 /// Reserved MPC tags
37  TAG_STREAMHDR = MKMPCTAG('S','H'),
38  TAG_STREAMEND = MKMPCTAG('S','E'),
39 
41 
43  TAG_SEEKTABLE = MKMPCTAG('S','T'),
44 
46  TAG_ENCINFO = MKMPCTAG('E','I'),
47 };
48 
49 static const int mpc8_rate[8] = { 44100, 48000, 37800, 32000, -1, -1, -1, -1 };
50 
51 typedef struct MPCContext {
52  int ver;
53  int64_t header_pos;
54  int64_t samples;
55 
56  int64_t apetag_start;
57 } MPCContext;
58 
59 static inline int64_t bs_get_v(const uint8_t **bs)
60 {
61  uint64_t v = 0;
62  int br = 0;
63  int c;
64 
65  do {
66  c = **bs; (*bs)++;
67  v <<= 7;
68  v |= c & 0x7F;
69  br++;
70  if (br > 10)
71  return -1;
72  } while (c & 0x80);
73 
74  return v - br;
75 }
76 
77 static int mpc8_probe(const AVProbeData *p)
78 {
79  const uint8_t *bs = p->buf + 4;
80  const uint8_t *bs_end = bs + p->buf_size;
81  int64_t size;
82 
83  if (p->buf_size < 16)
84  return 0;
85  if (AV_RL32(p->buf) != TAG_MPCK)
86  return 0;
87  while (bs < bs_end + 3) {
88  int header_found = (bs[0] == 'S' && bs[1] == 'H');
89  if (bs[0] < 'A' || bs[0] > 'Z' || bs[1] < 'A' || bs[1] > 'Z')
90  return 0;
91  bs += 2;
92  size = bs_get_v(&bs);
93  if (size < 2)
94  return 0;
95  if (size >= bs_end - bs + 2)
96  return AVPROBE_SCORE_EXTENSION - 1; // seems to be valid MPC but no header yet
97  if (header_found) {
98  if (size < 11 || size > 28)
99  return 0;
100  if (!AV_RL32(bs)) //zero CRC is invalid
101  return 0;
102  return AVPROBE_SCORE_MAX;
103  } else {
104  bs += size - 2;
105  }
106  }
107  return 0;
108 }
109 
110 static inline int64_t gb_get_v(GetBitContext *gb)
111 {
112  uint64_t v = 0;
113  int bits = 0;
114  while(get_bits1(gb) && bits < 64-7){
115  v <<= 7;
116  v |= get_bits(gb, 7);
117  bits += 7;
118  }
119  v <<= 7;
120  v |= get_bits(gb, 7);
121 
122  return v;
123 }
124 
125 static void mpc8_get_chunk_header(AVIOContext *pb, int *tag, int64_t *size)
126 {
127  int64_t pos;
128  pos = avio_tell(pb);
129  *tag = avio_rl16(pb);
130  *size = ffio_read_varlen(pb);
131  pos -= avio_tell(pb);
132  if (av_sat_add64(*size, pos) != (uint64_t)*size + pos) {
133  *size = -1;
134  } else
135  *size += pos;
136 }
137 
138 static int mpc8_parse_seektable(AVFormatContext *s, int64_t off)
139 {
140  MPCContext *c = s->priv_data;
141  int tag;
142  int64_t size, pos, ppos[2];
143  uint8_t *buf;
144  int i, t, seekd, ret;
145  int64_t ret64;
146  GetBitContext gb;
147 
148  if (s->nb_streams == 0) {
149  av_log(s, AV_LOG_ERROR, "No stream added before parsing seek table\n");
150  return AVERROR_INVALIDDATA;
151  }
152 
153  ret64 = avio_seek(s->pb, off, SEEK_SET);
154  if (ret64 < 0)
155  return AVERROR_INVALIDDATA;
156  mpc8_get_chunk_header(s->pb, &tag, &size);
157  if(tag != TAG_SEEKTABLE || avio_feof(s->pb)){
158  av_log(s, AV_LOG_ERROR, "No seek table at given position\n");
159  return AVERROR_INVALIDDATA;
160  }
161  if (size > INT_MAX/10 || size<=0) {
162  av_log(s, AV_LOG_ERROR, "Bad seek table size\n");
163  return AVERROR_INVALIDDATA;
164  }
166  return AVERROR(ENOMEM);
167  ret = avio_read(s->pb, buf, size);
168  if (ret != size) {
169  av_log(s, AV_LOG_ERROR, "seek table truncated\n");
170  av_free(buf);
171  return AVERROR_INVALIDDATA;
172  }
173  memset(buf+size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
174 
175  init_get_bits(&gb, buf, size * 8);
176  size = gb_get_v(&gb);
177  if(size > UINT_MAX/4 || size > c->samples/1152){
178  av_log(s, AV_LOG_ERROR, "Seek table is too big\n");
179  av_free(buf);
180  return AVERROR_INVALIDDATA;
181  }
182  seekd = get_bits(&gb, 4);
183  for(i = 0; i < 2; i++){
184  pos = gb_get_v(&gb);
185  if (av_sat_add64(pos, c->header_pos) != pos + (uint64_t)c->header_pos) {
186  av_free(buf);
187  return AVERROR_INVALIDDATA;
188  }
189 
190  pos += c->header_pos;
191  ppos[1 - i] = pos;
192  av_add_index_entry(s->streams[0], pos, i, 0, 0, AVINDEX_KEYFRAME);
193  }
194  for(; i < size; i++){
195  if (get_bits_left(&gb) < 13) {
196  av_free(buf);
197  return AVERROR_INVALIDDATA;
198  }
199  t = get_unary(&gb, 1, 33) << 12;
200  t += get_bits(&gb, 12);
201  if(t & 1)
202  t = -(t & ~1);
203  pos = (t >> 1) + (uint64_t)ppos[0]*2 - ppos[1];
204  av_add_index_entry(s->streams[0], pos, (int64_t)i << seekd, 0, 0, AVINDEX_KEYFRAME);
205  ppos[1] = ppos[0];
206  ppos[0] = pos;
207  }
208  av_free(buf);
209  return 0;
210 }
211 
212 static int mpc8_handle_chunk(AVFormatContext *s, int tag, int64_t chunk_pos, int64_t size)
213 {
214  AVIOContext *pb = s->pb;
215  int64_t pos, off;
216  int ret;
217 
218  switch(tag){
219  case TAG_SEEKTBLOFF:
220  pos = avio_tell(pb);
221  off = ffio_read_varlen(pb);
222  if (pos > INT64_MAX - size || off < 0 || off > INT64_MAX - chunk_pos)
223  return AVERROR_INVALIDDATA;
224  pos += size;
225  ret = mpc8_parse_seektable(s, chunk_pos + off);
226  if (ret < 0)
227  return AVERROR_INVALIDDATA;
228  avio_seek(pb, pos, SEEK_SET);
229  break;
230  default:
231  avio_skip(pb, size);
232  }
233  return 0;
234 }
235 
237 {
238  MPCContext *c = s->priv_data;
239  AVIOContext *pb = s->pb;
240  AVStream *st;
241  int tag = 0, ret;
242  int channels;
243  int64_t size, pos;
244 
245  c->header_pos = avio_tell(pb);
246  if(avio_rl32(pb) != TAG_MPCK){
247  av_log(s, AV_LOG_ERROR, "Not a Musepack8 file\n");
248  return AVERROR_INVALIDDATA;
249  }
250 
251  while(!avio_feof(pb)){
252  pos = avio_tell(pb);
254  if (size < 0) {
255  av_log(s, AV_LOG_ERROR, "Invalid chunk length\n");
256  return AVERROR_INVALIDDATA;
257  }
258  if(tag == TAG_STREAMHDR)
259  break;
261  if (ret < 0)
262  return ret;
263  }
264  if(tag != TAG_STREAMHDR){
265  av_log(s, AV_LOG_ERROR, "Stream header not found\n");
266  return AVERROR_INVALIDDATA;
267  }
268  pos = avio_tell(pb);
269  avio_skip(pb, 4); //CRC
270  c->ver = avio_r8(pb);
271  if(c->ver != 8){
272  avpriv_report_missing_feature(s, "Stream version %d", c->ver);
273  return AVERROR_PATCHWELCOME;
274  }
275  c->samples = ffio_read_varlen(pb);
276  ffio_read_varlen(pb); //silence samples at the beginning
277 
278  st = avformat_new_stream(s, NULL);
279  if (!st)
280  return AVERROR(ENOMEM);
284 
285  if ((ret = ff_get_extradata(s, st->codecpar, pb, 2)) < 0)
286  return ret;
287 
288  channels = (st->codecpar->extradata[1] >> 4) + 1;
290  st->codecpar->sample_rate = mpc8_rate[st->codecpar->extradata[0] >> 5];
291  avpriv_set_pts_info(st, 64, 1152 << (st->codecpar->extradata[1]&3)*2, st->codecpar->sample_rate);
292  st->start_time = 0;
293  st->duration = c->samples / (1152 << (st->codecpar->extradata[1]&3)*2);
294  size -= avio_tell(pb) - pos;
295  if (size > 0)
296  avio_skip(pb, size);
297 
298  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
299  int64_t pos = avio_tell(s->pb);
300  c->apetag_start = ff_ape_parse_tag(s);
301  avio_seek(s->pb, pos, SEEK_SET);
302  }
303 
304  return 0;
305 }
306 
308 {
309  MPCContext *c = s->priv_data;
310  int tag, ret;
311  int64_t pos, size;
312 
313  while(!avio_feof(s->pb)){
314  pos = avio_tell(s->pb);
315 
316  /* don't return bogus packets with the ape tag data */
317  if (c->apetag_start && pos >= c->apetag_start)
318  return AVERROR_EOF;
319 
320  mpc8_get_chunk_header(s->pb, &tag, &size);
321  if (size < 0 || size > INT_MAX)
322  return -1;
323  if(tag == TAG_AUDIOPACKET){
324  if ((ret = av_get_packet(s->pb, pkt, size)) < 0)
325  return ret;
326  pkt->stream_index = 0;
327  pkt->duration = 1;
328  return 0;
329  }
330  if(tag == TAG_STREAMEND)
331  return AVERROR_EOF;
333  }
334  return AVERROR_EOF;
335 }
336 
337 static int mpc8_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
338 {
339  AVStream *st = s->streams[stream_index];
340  FFStream *const sti = ffstream(st);
341  int index = av_index_search_timestamp(st, timestamp, flags);
342 
343  if(index < 0) return -1;
344  if (avio_seek(s->pb, sti->index_entries[index].pos, SEEK_SET) < 0)
345  return -1;
347  return 0;
348 }
349 
350 
352  .name = "mpc8",
353  .long_name = NULL_IF_CONFIG_SMALL("Musepack SV8"),
354  .priv_data_size = sizeof(MPCContext),
359 };
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:76
ff_mpc8_demuxer
const AVInputFormat ff_mpc8_demuxer
Definition: mpc8.c:351
get_bits_left
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:839
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: options.c:237
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:58
TAG_AUDIOPACKET
@ TAG_AUDIOPACKET
Definition: mpc8.c:40
TAG_ENCINFO
@ TAG_ENCINFO
Definition: mpc8.c:46
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
mpc8_read_seek
static int mpc8_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: mpc8.c:337
apetag.h
mpc8_get_chunk_header
static void mpc8_get_chunk_header(AVIOContext *pb, int *tag, int64_t *size)
Definition: mpc8.c:125
MPCContext
Definition: mpc.h:54
mpc8_read_packet
static int mpc8_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mpc8.c:307
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:392
AVProbeData::buf_size
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:456
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:311
init_get_bits
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:649
avpriv_update_cur_dts
void avpriv_update_cur_dts(AVFormatContext *s, AVStream *ref_st, int64_t timestamp)
Update cur_dts of all streams based on the given timestamp and AVStream.
Definition: seek.c:35
ff_ape_parse_tag
int64_t ff_ape_parse_tag(AVFormatContext *s)
Read and parse an APE tag.
Definition: apetag.c:109
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:30
AVINDEX_KEYFRAME
#define AVINDEX_KEYFRAME
Definition: avformat.h:815
ff_get_extradata
int ff_get_extradata(void *logctx, AVCodecParameters *par, AVIOContext *pb, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0 and f...
Definition: demux_utils.c:355
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:465
get_bits
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
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:763
ffstream
static av_always_inline FFStream * ffstream(AVStream *st)
Definition: internal.h:413
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:120
GetBitContext
Definition: get_bits.h:61
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:510
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:998
avio_rl16
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:745
mpc8_handle_chunk
static int mpc8_handle_chunk(AVFormatContext *s, int tag, int64_t chunk_pos, int64_t size)
Definition: mpc8.c:212
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:656
mpc8_read_header
static int mpc8_read_header(AVFormatContext *s)
Definition: mpc8.c:236
s
#define s(width, name)
Definition: cbs_vp9.c:256
TAG_SEEKTABLE
@ TAG_SEEKTABLE
Definition: mpc8.c:43
TAG_STREAMEND
@ TAG_STREAMEND
Definition: mpc8.c:38
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:661
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:455
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
mpc8_parse_seektable
static int mpc8_parse_seektable(AVFormatContext *s, int64_t off)
Definition: mpc8.c:138
bits
uint8_t bits
Definition: vp3data.h:128
AVIndexEntry::timestamp
int64_t timestamp
Timestamp in AVStream.time_base units, preferably the time from which on correctly decoded frames are...
Definition: avformat.h:809
channels
channels
Definition: aptx.h:31
get_bits.h
AVFormatContext
Format I/O context.
Definition: avformat.h:1216
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1108
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:533
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
gb_get_v
static int64_t gb_get_v(GetBitContext *gb)
Definition: mpc8.c:110
get_bits1
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:498
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:453
MPCContext::samples
int64_t samples
Definition: mpc8.c:54
TAG_MPCK
#define TAG_MPCK
Definition: mpc8.c:33
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
Audio only.
Definition: codec_par.h:213
index
int index
Definition: gxfenc.c:89
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
AVPROBE_SCORE_EXTENSION
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:463
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:178
get_unary
static int get_unary(GetBitContext *gb, int stop, int len)
Get unary code of limited length.
Definition: unary.h:46
avio_rl32
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:761
AVIOContext
Bytestream IO Context.
Definition: avio.h:166
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:115
AVIOContext::seekable
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:267
FFStream
Definition: internal.h:196
TAG_SEEKTBLOFF
@ TAG_SEEKTBLOFF
Definition: mpc8.c:42
size
int size
Definition: twinvq_data.h:10344
avpriv_report_missing_feature
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
avio_r8
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:634
ffio_read_varlen
uint64_t ffio_read_varlen(AVIOContext *bc)
Definition: aviobuf.c:947
unary.h
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
avio_internal.h
demux.h
av_get_packet
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
Allocate and read the payload of a packet and initialize its fields with default values.
Definition: utils.c:102
tag
uint32_t tag
Definition: movenc.c:1647
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:948
MPCContext::header_pos
int64_t header_pos
Definition: mpc8.c:53
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:262
pos
unsigned int pos
Definition: spdifenc.c:412
avformat.h
AV_INPUT_BUFFER_PADDING_SIZE
#define AV_INPUT_BUFFER_PADDING_SIZE
Definition: defs.h:40
AV_CODEC_ID_MUSEPACK8
@ AV_CODEC_ID_MUSEPACK8
Definition: codec_id.h:469
av_sat_add64
#define av_sat_add64
Definition: common.h:137
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:92
MKMPCTAG
#define MKMPCTAG(a, b)
Two-byte MPC tag.
Definition: mpc8.c:31
AVIO_SEEKABLE_NORMAL
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:41
MPCContext::apetag_start
int64_t apetag_start
Definition: mpc8.c:56
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:643
AVIndexEntry::pos
int64_t pos
Definition: avformat.h:808
AVPacket::stream_index
int stream_index
Definition: packet.h:376
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:349
FFStream::index_entries
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: internal.h:251
AVCodecParameters::bits_per_coded_sample
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:104
av_free
#define av_free(p)
Definition: tableprint_vlc.h:33
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:62
AVPacket
This structure stores compressed data.
Definition: packet.h:351
TAG_STREAMHDR
@ TAG_STREAMHDR
Definition: mpc8.c:37
TAG_REPLAYGAIN
@ TAG_REPLAYGAIN
Definition: mpc8.c:45
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
MPCContext::ver
int ver
Definition: mpc.c:41
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
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:988
mpc8_probe
static int mpc8_probe(const AVProbeData *p)
Definition: mpc8.c:77
bs_get_v
static int64_t bs_get_v(const uint8_t **bs)
Definition: mpc8.c:59
MPCPacketTags
MPCPacketTags
Reserved MPC tags.
Definition: mpc8.c:36
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:240
mpc8_rate
static const int mpc8_rate[8]
Definition: mpc8.c:49
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:377