FFmpeg  4.3.7
fwse.c
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1 /*
2  * FWSE demuxer
3  * Copyright (c) 2020 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 #include "pcm.h"
26 
27 static int fwse_probe(const AVProbeData *p)
28 {
29  if (AV_RL32(p->buf) != MKTAG('F','W','S','E'))
30  return 0;
31  if (AV_RL32(p->buf+4) != 2 && AV_RL32(p->buf+4) != 3)
32  return 0;
33  if (AV_RL32(p->buf+16) != 1 && AV_RL32(p->buf+16) != 2)
34  return 0;
35 
36  return AVPROBE_SCORE_MAX / 4 * 3;
37 }
38 
40 {
41  unsigned start_offset, version;
42  AVIOContext *pb = s->pb;
43  AVCodecParameters *par;
44  AVStream *st;
45 
46  avio_skip(pb, 4);
47  version = avio_rl32(pb);
48  if (version != 2 && version != 3)
49  return AVERROR_INVALIDDATA;
50  avio_skip(pb, 4);
51  start_offset = avio_rl32(pb);
52 
53  st = avformat_new_stream(s, NULL);
54  if (!st)
55  return AVERROR(ENOMEM);
56 
57  par = st->codecpar;
61  par->channels = avio_rl32(pb);
62  if (par->channels != 1 && par->channels != 2)
63  return AVERROR_INVALIDDATA;
64  if (par->channels == 1)
66  else if (par->channels == 2)
68  st->duration = avio_rl32(pb);
69  par->sample_rate = avio_rl32(pb);
70  if (par->sample_rate <= 0)
71  return AVERROR_INVALIDDATA;
72 
73  par->block_align = 1;
74  avio_skip(pb, start_offset - avio_tell(pb));
75 
76  avpriv_set_pts_info(st, 64, 1, par->sample_rate);
77 
78  return 0;
79 }
80 
82  .name = "fwse",
83  .long_name = NULL_IF_CONFIG_SMALL("Capcom's MT Framework sound"),
84  .read_probe = fwse_probe,
85  .read_header = fwse_read_header,
86  .read_packet = ff_pcm_read_packet,
87  .extensions = "fwse",
88 };
#define NULL
Definition: coverity.c:32
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
version
Definition: libkvazaar.c:292
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:4948
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:329
#define AV_CH_LAYOUT_STEREO
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
Format I/O context.
Definition: avformat.h:1351
static int fwse_read_header(AVFormatContext *s)
Definition: fwse.c:39
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4526
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
uint64_t channel_layout
Audio only.
Definition: codec_par.h:162
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:747
#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:188
AVInputFormat ff_fwse_demuxer
Definition: fwse.c:81
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
int block_align
Audio only.
Definition: codec_par.h:177
#define s(width, name)
Definition: cbs_vp9.c:257
#define AV_RL32
Definition: intreadwrite.h:146
Stream structure.
Definition: avformat.h:876
int ff_pcm_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: pcm.c:29
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:925
int sample_rate
Audio only.
Definition: codec_par.h:170
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
Main libavformat public API header.
signed 16 bits
Definition: samplefmt.h:61
int channels
Audio only.
Definition: codec_par.h:166
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:650
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1023
#define AV_CH_LAYOUT_MONO
#define MKTAG(a, b, c, d)
Definition: common.h:406
static int fwse_probe(const AVProbeData *p)
Definition: fwse.c:27