FFmpeg
mpc8.c
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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 "libavutil/mem.h"
23 #include "libavcodec/get_bits.h"
24 #include "libavcodec/unary.h"
25 #include "apetag.h"
26 #include "avformat.h"
27 #include "demux.h"
28 #include "internal.h"
29 #include "avio_internal.h"
30 
31 /// Two-byte MPC tag
32 #define MKMPCTAG(a, b) ((a) | ((b) << 8))
33 
34 #define TAG_MPCK MKTAG('M','P','C','K')
35 
36 /// Reserved MPC tags
38  TAG_STREAMHDR = MKMPCTAG('S','H'),
39  TAG_STREAMEND = MKMPCTAG('S','E'),
40 
42 
44  TAG_SEEKTABLE = MKMPCTAG('S','T'),
45 
47  TAG_ENCINFO = MKMPCTAG('E','I'),
48 };
49 
50 static const int mpc8_rate[8] = { 44100, 48000, 37800, 32000, -1, -1, -1, -1 };
51 
52 typedef struct MPCContext {
53  int ver;
54  int64_t header_pos;
55  int64_t samples;
56 
57  int64_t apetag_start;
58 } MPCContext;
59 
60 static inline int64_t bs_get_v(const uint8_t **bs)
61 {
62  uint64_t v = 0;
63  int br = 0;
64  int c;
65 
66  do {
67  c = **bs; (*bs)++;
68  v <<= 7;
69  v |= c & 0x7F;
70  br++;
71  if (br > 10)
72  return -1;
73  } while (c & 0x80);
74 
75  return v - br;
76 }
77 
78 static int mpc8_probe(const AVProbeData *p)
79 {
80  const uint8_t *bs = p->buf + 4;
81  const uint8_t *bs_end = bs + p->buf_size;
82  int64_t size;
83 
84  if (p->buf_size < 16)
85  return 0;
86  if (AV_RL32(p->buf) != TAG_MPCK)
87  return 0;
88  while (bs < bs_end + 3) {
89  int header_found = (bs[0] == 'S' && bs[1] == 'H');
90  if (bs[0] < 'A' || bs[0] > 'Z' || bs[1] < 'A' || bs[1] > 'Z')
91  return 0;
92  bs += 2;
93  size = bs_get_v(&bs);
94  if (size < 2)
95  return 0;
96  if (size >= bs_end - bs + 2)
97  return AVPROBE_SCORE_EXTENSION - 1; // seems to be valid MPC but no header yet
98  if (header_found) {
99  if (size < 11 || size > 28)
100  return 0;
101  if (!AV_RL32(bs)) //zero CRC is invalid
102  return 0;
103  return AVPROBE_SCORE_MAX;
104  } else {
105  bs += size - 2;
106  }
107  }
108  return 0;
109 }
110 
111 static inline int64_t gb_get_v(GetBitContext *gb)
112 {
113  uint64_t v = 0;
114  int bits = 0;
115  while(get_bits1(gb) && bits < 64-7){
116  v <<= 7;
117  v |= get_bits(gb, 7);
118  bits += 7;
119  }
120  v <<= 7;
121  v |= get_bits(gb, 7);
122 
123  return v;
124 }
125 
126 static void mpc8_get_chunk_header(AVIOContext *pb, int *tag, int64_t *size)
127 {
128  int64_t pos;
129  pos = avio_tell(pb);
130  *tag = avio_rl16(pb);
131  *size = ffio_read_varlen(pb);
132  pos -= avio_tell(pb);
133  if (av_sat_add64(*size, pos) != (uint64_t)*size + pos) {
134  *size = -1;
135  } else
136  *size += pos;
137 }
138 
139 static int mpc8_parse_seektable(AVFormatContext *s, int64_t off)
140 {
141  MPCContext *c = s->priv_data;
142  int tag;
143  int64_t size, pos, ppos[2];
144  uint8_t *buf;
145  int i, t, seekd, ret;
146  int64_t ret64;
147  GetBitContext gb;
148 
149  if (s->nb_streams == 0) {
150  av_log(s, AV_LOG_ERROR, "No stream added before parsing seek table\n");
151  return AVERROR_INVALIDDATA;
152  }
153 
154  ret64 = avio_seek(s->pb, off, SEEK_SET);
155  if (ret64 < 0)
156  return AVERROR_INVALIDDATA;
157  mpc8_get_chunk_header(s->pb, &tag, &size);
158  if(tag != TAG_SEEKTABLE || avio_feof(s->pb)){
159  av_log(s, AV_LOG_ERROR, "No seek table at given position\n");
160  return AVERROR_INVALIDDATA;
161  }
162  if (size > INT_MAX/10 || size<=0) {
163  av_log(s, AV_LOG_ERROR, "Bad seek table size\n");
164  return AVERROR_INVALIDDATA;
165  }
167  return AVERROR(ENOMEM);
168  ret = avio_read(s->pb, buf, size);
169  if (ret != size) {
170  av_log(s, AV_LOG_ERROR, "seek table truncated\n");
171  av_free(buf);
172  return AVERROR_INVALIDDATA;
173  }
174  memset(buf+size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
175 
176  init_get_bits(&gb, buf, size * 8);
177  size = gb_get_v(&gb);
178  if(size > UINT_MAX/4 || size > c->samples/1152){
179  av_log(s, AV_LOG_ERROR, "Seek table is too big\n");
180  av_free(buf);
181  return AVERROR_INVALIDDATA;
182  }
183  seekd = get_bits(&gb, 4);
184  for(i = 0; i < 2; i++){
185  pos = gb_get_v(&gb);
186  if (av_sat_add64(pos, c->header_pos) != pos + (uint64_t)c->header_pos) {
187  av_free(buf);
188  return AVERROR_INVALIDDATA;
189  }
190 
191  pos += c->header_pos;
192  ppos[1 - i] = pos;
193  av_add_index_entry(s->streams[0], pos, i, 0, 0, AVINDEX_KEYFRAME);
194  }
195  for(; i < size; i++){
196  if (get_bits_left(&gb) < 13) {
197  av_free(buf);
198  return AVERROR_INVALIDDATA;
199  }
200  t = get_unary(&gb, 1, 33) << 12;
201  t += get_bits(&gb, 12);
202  if(t & 1)
203  t = -(t & ~1);
204  pos = (t >> 1) + (uint64_t)ppos[0]*2 - ppos[1];
205  av_add_index_entry(s->streams[0], pos, (int64_t)i << seekd, 0, 0, AVINDEX_KEYFRAME);
206  ppos[1] = ppos[0];
207  ppos[0] = pos;
208  }
209  av_free(buf);
210  return 0;
211 }
212 
213 static int mpc8_handle_chunk(AVFormatContext *s, int tag, int64_t chunk_pos, int64_t size)
214 {
215  AVIOContext *pb = s->pb;
216  int64_t pos, off;
217  int ret;
218 
219  switch(tag){
220  case TAG_SEEKTBLOFF:
221  pos = avio_tell(pb);
222  off = ffio_read_varlen(pb);
223  if (pos > INT64_MAX - size || off < 0 || off > INT64_MAX - chunk_pos)
224  return AVERROR_INVALIDDATA;
225  pos += size;
226  ret = mpc8_parse_seektable(s, chunk_pos + off);
227  if (ret < 0)
228  return AVERROR_INVALIDDATA;
229  avio_seek(pb, pos, SEEK_SET);
230  break;
231  default:
232  avio_skip(pb, size);
233  }
234  return 0;
235 }
236 
238 {
239  MPCContext *c = s->priv_data;
240  AVIOContext *pb = s->pb;
241  AVStream *st;
242  int tag = 0, ret;
243  int channels;
244  int64_t size, pos;
245 
246  c->header_pos = avio_tell(pb);
247  if(avio_rl32(pb) != TAG_MPCK){
248  av_log(s, AV_LOG_ERROR, "Not a Musepack8 file\n");
249  return AVERROR_INVALIDDATA;
250  }
251 
252  while(!avio_feof(pb)){
253  pos = avio_tell(pb);
255  if (size < 0) {
256  av_log(s, AV_LOG_ERROR, "Invalid chunk length\n");
257  return AVERROR_INVALIDDATA;
258  }
259  if(tag == TAG_STREAMHDR)
260  break;
262  if (ret < 0)
263  return ret;
264  }
265  if(tag != TAG_STREAMHDR){
266  av_log(s, AV_LOG_ERROR, "Stream header not found\n");
267  return AVERROR_INVALIDDATA;
268  }
269  pos = avio_tell(pb);
270  avio_skip(pb, 4); //CRC
271  c->ver = avio_r8(pb);
272  if(c->ver != 8){
273  avpriv_report_missing_feature(s, "Stream version %d", c->ver);
274  return AVERROR_PATCHWELCOME;
275  }
276  c->samples = ffio_read_varlen(pb);
277  ffio_read_varlen(pb); //silence samples at the beginning
278 
279  st = avformat_new_stream(s, NULL);
280  if (!st)
281  return AVERROR(ENOMEM);
285 
286  if ((ret = ff_get_extradata(s, st->codecpar, pb, 2)) < 0)
287  return ret;
288 
289  channels = (st->codecpar->extradata[1] >> 4) + 1;
291  st->codecpar->sample_rate = mpc8_rate[st->codecpar->extradata[0] >> 5];
292  avpriv_set_pts_info(st, 64, 1152 << (st->codecpar->extradata[1]&3)*2, st->codecpar->sample_rate);
293  st->start_time = 0;
294  st->duration = c->samples / (1152 << (st->codecpar->extradata[1]&3)*2);
295  size -= avio_tell(pb) - pos;
296  if (size > 0)
297  avio_skip(pb, size);
298 
299  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
300  int64_t pos = avio_tell(s->pb);
301  c->apetag_start = ff_ape_parse_tag(s);
302  avio_seek(s->pb, pos, SEEK_SET);
303  }
304 
305  return 0;
306 }
307 
309 {
310  MPCContext *c = s->priv_data;
311  int tag, ret;
312  int64_t pos, size;
313 
314  while(!avio_feof(s->pb)){
315  pos = avio_tell(s->pb);
316 
317  /* don't return bogus packets with the ape tag data */
318  if (c->apetag_start && pos >= c->apetag_start)
319  return AVERROR_EOF;
320 
321  mpc8_get_chunk_header(s->pb, &tag, &size);
322  if (size < 0 || size > INT_MAX)
323  return -1;
324  if(tag == TAG_AUDIOPACKET){
325  if ((ret = av_get_packet(s->pb, pkt, size)) < 0)
326  return ret;
327  pkt->stream_index = 0;
328  pkt->duration = 1;
329  return 0;
330  }
331  if(tag == TAG_STREAMEND)
332  return AVERROR_EOF;
334  }
335  return AVERROR_EOF;
336 }
337 
338 static int mpc8_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
339 {
340  AVStream *st = s->streams[stream_index];
341  FFStream *const sti = ffstream(st);
342  int index = av_index_search_timestamp(st, timestamp, flags);
343 
344  if(index < 0) return -1;
345  if (avio_seek(s->pb, sti->index_entries[index].pos, SEEK_SET) < 0)
346  return -1;
348  return 0;
349 }
350 
351 
353  .p.name = "mpc8",
354  .p.long_name = NULL_IF_CONFIG_SMALL("Musepack SV8"),
355  .priv_data_size = sizeof(MPCContext),
360 };
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:69
get_bits_left
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:695
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
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:51
TAG_AUDIOPACKET
@ TAG_AUDIOPACKET
Definition: mpc8.c:41
TAG_ENCINFO
@ TAG_ENCINFO
Definition: mpc8.c:47
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
mpc8_read_seek
static int mpc8_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: mpc8.c:338
apetag.h
mpc8_get_chunk_header
static void mpc8_get_chunk_header(AVIOContext *pb, int *tag, int64_t *size)
Definition: mpc8.c:126
MPCContext
Definition: mpc.h:54
mpc8_read_packet
static int mpc8_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: mpc8.c:308
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:542
AVProbeData::buf_size
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:454
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:313
init_get_bits
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:514
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:36
ff_ape_parse_tag
int64_t ff_ape_parse_tag(AVFormatContext *s)
Read and parse an APE tag.
Definition: apetag.c:110
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:30
ff_mpc8_demuxer
const FFInputFormat ff_mpc8_demuxer
Definition: mpc8.c:352
AVINDEX_KEYFRAME
#define AVINDEX_KEYFRAME
Definition: avformat.h:610
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:335
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:463
get_bits
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:335
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:853
ffstream
static av_always_inline FFStream * ffstream(AVStream *st)
Definition: internal.h:417
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:121
GetBitContext
Definition: get_bits.h:108
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:494
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:802
avio_rl16
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:714
mpc8_handle_chunk
static int mpc8_handle_chunk(AVFormatContext *s, int tag, int64_t chunk_pos, int64_t size)
Definition: mpc8.c:213
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:180
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_read_callback.c:42
mpc8_read_header
static int mpc8_read_header(AVFormatContext *s)
Definition: mpc8.c:237
s
#define s(width, name)
Definition: cbs_vp9.c:198
TAG_SEEKTABLE
@ TAG_SEEKTABLE
Definition: mpc8.c:44
TAG_STREAMEND
@ TAG_STREAMEND
Definition: mpc8.c:39
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:553
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:202
mpc8_parse_seektable
static int mpc8_parse_seektable(AVFormatContext *s, int64_t off)
Definition: mpc8.c:139
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:604
channels
channels
Definition: aptx.h:31
get_bits.h
AVFormatContext
Format I/O context.
Definition: avformat.h:1255
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:766
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:550
NULL
#define NULL
Definition: coverity.c:32
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:64
gb_get_v
static int64_t gb_get_v(GetBitContext *gb)
Definition: mpc8.c:111
get_bits1
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:388
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:451
MPCContext::samples
int64_t samples
Definition: mpc8.c:55
TAG_MPCK
#define TAG_MPCK
Definition: mpc8.c:34
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
Audio only.
Definition: codec_par.h:180
index
int index
Definition: gxfenc.c:90
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:461
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:184
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:730
AVIOContext
Bytestream IO Context.
Definition: avio.h:160
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
FFStream
Definition: internal.h:193
TAG_SEEKTBLOFF
@ TAG_SEEKTBLOFF
Definition: mpc8.c:43
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.
FFInputFormat::p
AVInputFormat p
The public AVInputFormat.
Definition: demux.h:41
avio_r8
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:603
ffio_read_varlen
uint64_t ffio_read_varlen(AVIOContext *bc)
Definition: aviobuf.c:916
unary.h
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
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:91
tag
uint32_t tag
Definition: movenc.c:1788
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:743
MPCContext::header_pos
int64_t header_pos
Definition: mpc8.c:54
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:231
pos
unsigned int pos
Definition: spdifenc.c:414
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:474
av_sat_add64
#define av_sat_add64
Definition: common.h:141
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:32
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:57
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:612
AVIndexEntry::pos
int64_t pos
Definition: avformat.h:603
AVPacket::stream_index
int stream_index
Definition: packet.h:526
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:318
FFStream::index_entries
AVIndexEntry * index_entries
Only used if the format does not support seeking natively.
Definition: internal.h:249
read_probe
static int read_probe(const AVProbeData *p)
Definition: cdg.c:30
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
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:55
AVPacket
This structure stores compressed data.
Definition: packet.h:501
TAG_STREAMHDR
@ TAG_STREAMHDR
Definition: mpc8.c:38
TAG_REPLAYGAIN
@ TAG_REPLAYGAIN
Definition: mpc8.c:46
FFInputFormat
Definition: demux.h:37
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:474
MPCContext::ver
int ver
Definition: mpc.c:42
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:792
mpc8_probe
static int mpc8_probe(const AVProbeData *p)
Definition: mpc8.c:78
bs_get_v
static int64_t bs_get_v(const uint8_t **bs)
Definition: mpc8.c:60
MPCPacketTags
MPCPacketTags
Reserved MPC tags.
Definition: mpc8.c:37
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:244
mpc8_rate
static const int mpc8_rate[8]
Definition: mpc8.c:50
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:346