3 * Copyright (c) 2012 Paul B Mahol
5 * This file is part of FFmpeg.
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.
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.
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
22 #include "libavutil/intreadwrite.h"
28 static int ircam_probe(AVProbeData
*p
)
30 if ((p
->buf
[0] == 0x64 && p
->buf
[1] == 0xA3 && p
->buf
[3] == 0x00 &&
31 p
->buf
[2] >= 1 && p
->buf
[2] <= 4) ||
32 (p
->buf
[3] == 0x64 && p
->buf
[2] == 0xA3 && p
->buf
[0] == 0x00 &&
33 p
->buf
[1] >= 1 && p
->buf
[1] <= 3) &&
34 AV_RN32(p
->buf
+ 4) && AV_RN32(p
->buf
+ 8))
35 return AVPROBE_SCORE_MAX
/ 4 * 3;
39 static const struct endianess
{
52 static int ircam_read_header(AVFormatContext
*s
)
54 uint32_t magic
, sample_rate
, channels
, tag
;
55 const AVCodecTag
*tags
;
59 magic
= avio_rl32(s
->pb
);
60 for (i
= 0; i
< 7; i
++) {
61 if (magic
== table
[i
].magic
) {
68 sample_rate
= av_int2float(avio_rl32(s
->pb
));
69 channels
= avio_rl32(s
->pb
);
70 tag
= avio_rl32(s
->pb
);
71 tags
= ff_codec_ircam_le_tags
;
73 sample_rate
= av_int2float(avio_rb32(s
->pb
));
74 channels
= avio_rb32(s
->pb
);
75 tag
= avio_rb32(s
->pb
);
76 tags
= ff_codec_ircam_be_tags
;
78 return AVERROR_INVALIDDATA
;
81 if (!channels
|| !sample_rate
)
82 return AVERROR_INVALIDDATA
;
84 st
= avformat_new_stream(s
, NULL
);
86 return AVERROR(ENOMEM
);
88 st
->codec
->codec_type
= AVMEDIA_TYPE_AUDIO
;
89 st
->codec
->channels
= channels
;
90 st
->codec
->sample_rate
= sample_rate
;
92 st
->codec
->codec_id
= ff_codec_get_id(tags
, tag
);
93 if (st
->codec
->codec_id
== AV_CODEC_ID_NONE
) {
94 av_log(s
, AV_LOG_ERROR
, "unknown tag %X\n", tag
);
95 return AVERROR_INVALIDDATA
;
98 st
->codec
->bits_per_coded_sample
= av_get_bits_per_sample(st
->codec
->codec_id
);
99 st
->codec
->block_align
= st
->codec
->bits_per_coded_sample
* st
->codec
->channels
/ 8;
100 avpriv_set_pts_info(st
, 64, 1, st
->codec
->sample_rate
);
101 avio_skip(s
->pb
, 1008);
106 AVInputFormat ff_ircam_demuxer
= {
108 .long_name
= NULL_IF_CONFIG_SMALL("Berkeley/IRCAM/CARL Sound Format"),
109 .read_probe
= ircam_probe
,
110 .read_header
= ircam_read_header
,
111 .read_packet
= ff_pcm_read_packet
,
112 .read_seek
= ff_pcm_read_seek
,
113 .extensions
= "sf,ircam",
114 .flags
= AVFMT_GENERIC_INDEX
,