FFmpeg: libavformat/msf.c Source File

FFmpeg
msf.c
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1 /*
2  * MSF demuxer
3  * Copyright (c) 2015 Paul B Mahol
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/intreadwrite.h"
23 #include "avformat.h"
24 #include "internal.h"
25 
26  static int msf_probe(AVProbeData *p)
27 {
28  if (memcmp(p->buf, "MSF", 3))
29  return 0;
30 
31  if (AV_RB32(p->buf+8) <= 0)
32  return 0;
33 
34  if (AV_RB32(p->buf+16) <= 0)
35  return 0;
36 
37  if (AV_RB32(p->buf+4) > 16)
38  return AVPROBE_SCORE_MAX / 5; //unsupported / unknown codec
39 
40  return AVPROBE_SCORE_MAX / 3 * 2;
41 }
42 
43  static int msf_read_header(AVFormatContext *s)
44 {
45  unsigned codec, size;
46  AVStream *st;
47  int ret;
48 
49  avio_skip(s->pb, 4);
50 
51  st = avformat_new_stream(s, NULL);
52  if (!st)
53  return AVERROR(ENOMEM);
54 
55  st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
56  codec = avio_rb32(s->pb);
57  st->codecpar->channels = avio_rb32(s->pb);
58  if (st->codecpar->channels <= 0 || st->codecpar->channels >= INT_MAX / 1024)
59  return AVERROR_INVALIDDATA;
60  size = avio_rb32(s->pb);
61  st->codecpar->sample_rate = avio_rb32(s->pb);
62  if (st->codecpar->sample_rate <= 0)
63  return AVERROR_INVALIDDATA;
64  // avio_rb32(s->pb); /* byte flags with encoder info */
65  switch (codec) {
66  case 0: st->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE; break;
67  case 1: st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE; break;
68  case 3: st->codecpar->block_align = 16 * st->codecpar->channels;
69  st->codecpar->codec_id = AV_CODEC_ID_ADPCM_PSX; break;
70  case 4:
71  case 5:
72  case 6: st->codecpar->block_align = (codec == 4 ? 96 : codec == 5 ? 152 : 192) * st->codecpar->channels;
73  ret = ff_alloc_extradata(st->codecpar, 14);
74  if (ret < 0)
75  return ret;
76  memset(st->codecpar->extradata, 0, st->codecpar->extradata_size);
77  AV_WL16(st->codecpar->extradata, 1); /* version */
78  AV_WL16(st->codecpar->extradata+2, 2048 * st->codecpar->channels); /* unknown size */
79  AV_WL16(st->codecpar->extradata+6, codec == 4 ? 1 : 0); /* joint stereo */
80  AV_WL16(st->codecpar->extradata+8, codec == 4 ? 1 : 0); /* joint stereo (repeat?) */
81  AV_WL16(st->codecpar->extradata+10, 1);
82  st->codecpar->codec_id = AV_CODEC_ID_ATRAC3; break;
83  case 7: st->need_parsing = AVSTREAM_PARSE_FULL_RAW;
84  st->codecpar->codec_id = AV_CODEC_ID_MP3; break;
85  default:
86  avpriv_request_sample(s, "Codec %d", codec);
87  return AVERROR_PATCHWELCOME;
88  }
89  st->duration = av_get_audio_frame_duration2(st->codecpar, size);
90  avio_skip(s->pb, 0x40 - avio_tell(s->pb));
91  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
92 
93  return 0;
94 }
95 
96  static int msf_read_packet(AVFormatContext *s, AVPacket *pkt)
97 {
98  AVCodecParameters *par = s->streams[0]->codecpar;
99 
100  return av_get_packet(s->pb, pkt, par->block_align ? par->block_align : 1024 * par->channels);
101 }
102 
103  AVInputFormat ff_msf_demuxer = {
104  .name = "msf",
105  .long_name = NULL_IF_CONFIG_SMALL("Sony PS3 MSF"),
106  .read_probe = msf_probe,
107  .read_header = msf_read_header,
108  .read_packet = msf_read_packet,
109  .extensions = "msf",
110 };
NULL
#define NULL
Definition: coverity.c:32
s
const char * s
Definition: avisynth_c.h:768
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
avpriv_set_pts_info
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:4820
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3884
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:331
pkt
static AVPacket pkt
Definition: demuxing_decoding.c:54
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3876
AVFormatContext
Format I/O context.
Definition: avformat.h:1342
avpriv_request_sample
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
avio_rb32
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:801
AV_CODEC_ID_ATRAC3
Definition: avcodec.h:582
AVStream::need_parsing
enum AVStreamParseType need_parsing
Definition: avformat.h:1091
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4450
AV_RB32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:87
AVFormatContext::streams
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1410
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:310
size
ptrdiff_t size
Definition: opengl_enc.c:101
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
AVSTREAM_PARSE_FULL_RAW
full parsing and repack with timestamp and position generation by parser for raw this assumes that ea...
Definition: avformat.h:797
AVERROR
#define AVERROR(e)
Definition: error.h:43
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:186
ff_msf_demuxer
AVInputFormat ff_msf_demuxer
Definition: msf.c:103
AV_CODEC_ID_MP3
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:552
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3880
AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
msf_probe
static int msf_probe(AVProbeData *p)
Definition: msf.c:26
av_get_audio_frame_duration2
int av_get_audio_frame_duration2(AVCodecParameters *par, int frame_bytes)
This function is the same as av_get_audio_frame_duration(), except it works with AVCodecParameters in...
Definition: utils.c:1709
AVCodecParameters::extradata_size
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3902
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:450
AVCodecParameters::block_align
int block_align
Audio only.
Definition: avcodec.h:4001
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:3280
msf_read_packet
static int msf_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: msf.c:96
AV_CODEC_ID_PCM_S16BE
Definition: avcodec.h:453
AVStream
Stream structure.
Definition: avformat.h:873
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
AVFormatContext::pb
AVIOContext * pb
I/O context.
Definition: avformat.h:1384
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:448
AV_CODEC_ID_ADPCM_PSX
Definition: avcodec.h:528
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:922
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: avcodec.h:3994
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:460
avformat.h
Main libavformat public API header.
AV_WL16
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
AV_CODEC_ID_PCM_S16LE
Definition: avcodec.h:452
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3898
AVCodecParameters::channels
int channels
Audio only.
Definition: avcodec.h:3990
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:647
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1020
AVPacket
This structure stores compressed data.
Definition: avcodec.h:1407
msf_read_header
static int msf_read_header(AVFormatContext *s)
Definition: msf.c:43
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