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);
58  if (st->codecpar->ch_layout.nb_channels <= 0 ||
59  st->codecpar->ch_layout.nb_channels >= INT_MAX / 1024)
60  return AVERROR_INVALIDDATA;
61  size = avio_rb32(s->pb);
62  st->codecpar->sample_rate = avio_rb32(s->pb);
63  if (st->codecpar->sample_rate <= 0)
64  return AVERROR_INVALIDDATA;
65  // avio_rb32(s->pb); /* byte flags with encoder info */
66  switch (codec) {
67  case 0: st->codecpar->codec_id = AV_CODEC_ID_PCM_S16BE; break;
68  case 1: st->codecpar->codec_id = AV_CODEC_ID_PCM_S16LE; break;
69  case 3: st->codecpar->block_align = 16 * st->codecpar->ch_layout.nb_channels;
71  case 4:
72  case 5:
73  case 6: st->codecpar->block_align = (codec == 4 ? 96 : codec == 5 ? 152 : 192) * st->codecpar->ch_layout.nb_channels;
74  if (st->codecpar->ch_layout.nb_channels > UINT16_MAX / 2048)
75  return AVERROR_INVALIDDATA;
76  ret = ff_alloc_extradata(st->codecpar, 14);
77  if (ret < 0)
78  return ret;
79  memset(st->codecpar->extradata, 0, st->codecpar->extradata_size);
80  AV_WL16(st->codecpar->extradata, 1); /* version */
81  AV_WL16(st->codecpar->extradata+2, 2048 * st->codecpar->ch_layout.nb_channels); /* unknown size */
82  AV_WL16(st->codecpar->extradata+6, codec == 4 ? 1 : 0); /* joint stereo */
83  AV_WL16(st->codecpar->extradata+8, codec == 4 ? 1 : 0); /* joint stereo (repeat?) */
84  AV_WL16(st->codecpar->extradata+10, 1);
85  st->codecpar->codec_id = AV_CODEC_ID_ATRAC3; break;
87  st->codecpar->codec_id = AV_CODEC_ID_MP3; break;
88  default:
89  avpriv_request_sample(s, "Codec %d", codec);
90  return AVERROR_PATCHWELCOME;
91  }
93  avio_skip(s->pb, 0x40 - avio_tell(s->pb));
94  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
95 
96  return 0;
97 }
98 
100 {
101  AVCodecParameters *par = s->streams[0]->codecpar;
102 
103  return av_get_packet(s->pb, pkt, par->block_align ? par->block_align : 1024 * par->ch_layout.nb_channels);
104 }
105 
107  .name = "msf",
108  .long_name = NULL_IF_CONFIG_SMALL("Sony PS3 MSF"),
109  .read_probe = msf_probe,
110  .read_header = msf_read_header,
111  .read_packet = msf_read_packet,
112  .extensions = "msf",
113 };
AV_CODEC_ID_PCM_S16LE
@ AV_CODEC_ID_PCM_S16LE
Definition: codec_id.h:330
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:69
ff_msf_demuxer
const AVInputFormat ff_msf_demuxer
Definition: msf.c:106
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
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: codec_par.h:47
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const struct AVCodec *c)
Add a new stream to a media file.
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:317
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:464
msf_read_header
static int msf_read_header(AVFormatContext *s)
Definition: msf.c:43
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:761
ffstream
static av_always_inline FFStream * ffstream(AVStream *st)
Definition: internal.h:420
AV_CODEC_ID_PCM_S16BE
@ AV_CODEC_ID_PCM_S16BE
Definition: codec_id.h:331
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:513
AV_CODEC_ID_MP3
@ AV_CODEC_ID_MP3
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: codec_id.h:443
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:900
AV_CODEC_ID_ATRAC3
@ AV_CODEC_ID_ATRAC3
Definition: codec_id.h:473
avio_rb32
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:808
pkt
AVPacket * pkt
Definition: movenc.c:59
AVInputFormat
Definition: avformat.h:549
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:198
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:554
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:454
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
if
if(ret)
Definition: filter_design.txt:179
msf_probe
static int msf_probe(const AVProbeData *p)
Definition: msf.c:26
FFStream::need_parsing
enum AVStreamParseType need_parsing
Definition: internal.h:391
AVFormatContext
Format I/O context.
Definition: avformat.h:1115
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:864
NULL
#define NULL
Definition: coverity.c:32
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:64
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:452
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
Audio only.
Definition: codec_par.h:206
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:171
AVCodecParameters::extradata_size
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:73
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:106
size
int size
Definition: twinvq_data.h:10344
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:96
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:812
AV_WL16
#define AV_WL16(p, v)
Definition: intreadwrite.h:410
AVCodecParameters::block_align
int block_align
Audio only.
Definition: codec_par.h:178
msf_read_packet
static int msf_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: msf.c:99
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:103
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:841
avformat.h
AVSTREAM_PARSE_FULL_RAW
@ AVSTREAM_PARSE_FULL_RAW
full parsing and repack with timestamp and position generation by parser for raw this assumes that ea...
Definition: avformat.h:695
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:365
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:36
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:468
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
AV_CODEC_ID_ADPCM_PSX
@ AV_CODEC_ID_ADPCM_PSX
Definition: codec_id.h:406
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:239