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(const 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 
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 
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;
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;
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  }
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 
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 
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 };
#define NULL
Definition: coverity.c:32
#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:4929
#define avpriv_request_sample(...)
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3968
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:334
static AVPacket pkt
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3960
Format I/O context.
Definition: avformat.h:1358
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:803
enum AVStreamParseType need_parsing
Definition: avformat.h:1099
static int msf_probe(const AVProbeData *p)
Definition: msf.c:26
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4502
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:1426
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
ptrdiff_t size
Definition: opengl_enc.c:100
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
full parsing and repack with timestamp and position generation by parser for raw this assumes that ea...
Definition: avformat.h:804
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
AVInputFormat ff_msf_demuxer
Definition: msf.c:103
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:566
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3964
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:1746
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3986
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:448
int block_align
Audio only.
Definition: avcodec.h:4085
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
#define s(width, name)
Definition: cbs_vp9.c:257
static int msf_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: msf.c:96
Stream structure.
Definition: avformat.h:881
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
AVIOContext * pb
I/O context.
Definition: avformat.h:1400
This structure contains the data a format has to probe a file.
Definition: avformat.h:446
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:930
int sample_rate
Audio only.
Definition: avcodec.h:4078
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:458
Main libavformat public API header.
#define AV_WL16(p, v)
Definition: intreadwrite.h:412
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3982
int channels
Audio only.
Definition: avcodec.h:4074
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
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
This structure stores compressed data.
Definition: avcodec.h:1457
static int msf_read_header(AVFormatContext *s)
Definition: msf.c:43