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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  return AVPROBE_SCORE_MAX / 3 * 2;
38 }
39 
41 {
42  unsigned codec, align, size;
43  AVStream *st;
44 
45  avio_skip(s->pb, 4);
46 
47  st = avformat_new_stream(s, NULL);
48  if (!st)
49  return AVERROR(ENOMEM);
50 
52  codec = avio_rb32(s->pb);
53  st->codec->channels = avio_rb32(s->pb);
54  if (st->codec->channels <= 0 || st->codec->channels >= INT_MAX / 1024)
55  return AVERROR_INVALIDDATA;
56  size = avio_rb32(s->pb);
57  st->codec->sample_rate = avio_rb32(s->pb);
58  if (st->codec->sample_rate <= 0)
59  return AVERROR_INVALIDDATA;
60  align = avio_rb32(s->pb) ;
61  if (align > INT_MAX / st->codec->channels)
62  return AVERROR_INVALIDDATA;
63  st->codec->block_align = align;
64  switch (codec) {
65  case 0: st->codec->codec_id = AV_CODEC_ID_PCM_S16BE; break;
66  case 3: st->codec->block_align = 16 * st->codec->channels;
67  st->codec->codec_id = AV_CODEC_ID_ADPCM_PSX; break;
69  st->codec->codec_id = AV_CODEC_ID_MP3; break;
70  default:
71  avpriv_request_sample(s, "Codec %d", codec);
72  return AVERROR_PATCHWELCOME;
73  }
75  avio_skip(s->pb, 0x40 - avio_tell(s->pb));
76  avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
77 
78  return 0;
79 }
80 
82 {
83  AVCodecContext *codec = s->streams[0]->codec;
84 
85  return av_get_packet(s->pb, pkt, codec->block_align ? codec->block_align : 1024 * codec->channels);
86 }
87 
89  .name = "msf",
90  .long_name = NULL_IF_CONFIG_SMALL("Sony PS3 MSF"),
91  .read_probe = msf_probe,
92  .read_header = msf_read_header,
93  .read_packet = msf_read_packet,
94  .extensions = "msf",
95 };
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:631
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
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:4149
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:282
static AVPacket pkt
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
Definition: avcodec.h:2324
Format I/O context.
Definition: avformat.h:1314
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:698
enum AVStreamParseType need_parsing
Definition: avformat.h:1069
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:3805
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
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1382
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:252
ptrdiff_t size
Definition: opengl_enc.c:101
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:442
full parsing and repack with timestamp and position generation by parser for raw this assumes that ea...
Definition: avformat.h:811
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
AVInputFormat ff_msf_demuxer
Definition: msf.c:88
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:420
static int msf_probe(AVProbeData *p)
Definition: msf.c:26
AVCodecContext * codec
Codec context associated with this stream.
Definition: avformat.h:896
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:462
static int msf_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: msf.c:81
Stream structure.
Definition: avformat.h:877
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
const AVS_VideoInfo int align
Definition: avisynth_c.h:658
enum AVMediaType codec_type
Definition: avcodec.h:1540
enum AVCodecID codec_id
Definition: avcodec.h:1549
int sample_rate
samples per second
Definition: avcodec.h:2287
AVIOContext * pb
I/O context.
Definition: avformat.h:1356
main external API structure.
Definition: avcodec.h:1532
This structure contains the data a format has to probe a file.
Definition: avformat.h:460
int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
Return audio frame duration.
Definition: utils.c:3024
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:936
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:472
Main libavformat public API header.
int channels
number of audio channels
Definition: avcodec.h:2288
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:661
This structure stores compressed data.
Definition: avcodec.h:1444
static int msf_read_header(AVFormatContext *s)
Definition: msf.c:40