2 * Ensoniq Paris Audio File demuxer
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"
27 static int epaf_probe(AVProbeData
*p
)
29 if (((AV_RL32(p
->buf
) == MKTAG('f','a','p',' ') &&
30 AV_RL32(p
->buf
+ 8) == 1) ||
31 (AV_RL32(p
->buf
) == MKTAG(' ','p','a','f') &&
32 AV_RN32(p
->buf
+ 8) == 0)) &&
33 !AV_RN32(p
->buf
+ 4) && AV_RN32(p
->buf
+ 12) &&
35 return AVPROBE_SCORE_MAX
/ 4 * 3;
39 static int epaf_read_header(AVFormatContext
*s
)
41 int le
, sample_rate
, codec
, channels
;
46 return AVERROR_INVALIDDATA
;
48 le
= avio_rl32(s
->pb
);
50 return AVERROR_INVALIDDATA
;
53 sample_rate
= avio_rl32(s
->pb
);
54 codec
= avio_rl32(s
->pb
);
55 channels
= avio_rl32(s
->pb
);
57 sample_rate
= avio_rb32(s
->pb
);
58 codec
= avio_rb32(s
->pb
);
59 channels
= avio_rb32(s
->pb
);
62 if (!channels
|| !sample_rate
)
63 return AVERROR_INVALIDDATA
;
65 st
= avformat_new_stream(s
, NULL
);
67 return AVERROR(ENOMEM
);
69 st
->codec
->codec_type
= AVMEDIA_TYPE_AUDIO
;
70 st
->codec
->channels
= channels
;
71 st
->codec
->sample_rate
= sample_rate
;
74 st
->codec
->codec_id
= le
? AV_CODEC_ID_PCM_S16LE
: AV_CODEC_ID_PCM_S16BE
;
77 st
->codec
->codec_id
= AV_CODEC_ID_PCM_S8
;
80 avpriv_request_sample(s
, "24-bit Paris PCM format");
82 return AVERROR_INVALIDDATA
;
85 st
->codec
->bits_per_coded_sample
= av_get_bits_per_sample(st
->codec
->codec_id
);
86 st
->codec
->block_align
= st
->codec
->bits_per_coded_sample
* st
->codec
->channels
/ 8;
88 avpriv_set_pts_info(st
, 64, 1, st
->codec
->sample_rate
);
90 if (avio_skip(s
->pb
, 2024) < 0)
91 return AVERROR_INVALIDDATA
;
95 AVInputFormat ff_epaf_demuxer
= {
97 .long_name
= NULL_IF_CONFIG_SMALL("Ensoniq Paris Audio File"),
98 .read_probe
= epaf_probe
,
99 .read_header
= epaf_read_header
,
100 .read_packet
= ff_pcm_read_packet
,
101 .read_seek
= ff_pcm_read_seek
,
102 .extensions
= "paf,fap",
103 .flags
= AVFMT_GENERIC_INDEX
,