mirror of https://github.com/FFmpeg/FFmpeg.git
parent
880191637f
commit
4c18562d02
6 changed files with 109 additions and 1 deletions
@ -0,0 +1,104 @@ |
||||
/*
|
||||
* Ensoniq Paris Audio File demuxer |
||||
* Copyright (c) 2012 Paul B Mahol |
||||
* |
||||
* This file is part of FFmpeg. |
||||
* |
||||
* FFmpeg is free software; you can redistribute it and/or |
||||
* modify it under the terms of the GNU Lesser General Public |
||||
* License as published by the Free Software Foundation; either |
||||
* version 2.1 of the License, or (at your option) any later version. |
||||
* |
||||
* FFmpeg is distributed in the hope that it will be useful, |
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
||||
* Lesser General Public License for more details. |
||||
* |
||||
* You should have received a copy of the GNU Lesser General Public |
||||
* License along with FFmpeg; if not, write to the Free Software |
||||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
||||
*/ |
||||
|
||||
#include "libavutil/intreadwrite.h" |
||||
#include "avformat.h" |
||||
#include "internal.h" |
||||
#include "pcm.h" |
||||
|
||||
static int epaf_probe(AVProbeData *p) |
||||
{ |
||||
if (((AV_RL32(p->buf) == MKTAG('f','a','p',' ') && |
||||
AV_RL32(p->buf + 8) == 1) || |
||||
(AV_RL32(p->buf) == MKTAG(' ','p','a','f') && |
||||
AV_RN32(p->buf + 8) == 0)) && |
||||
!AV_RN32(p->buf + 4) && AV_RN32(p->buf + 12) && |
||||
AV_RN32(p->buf + 20)) |
||||
return AVPROBE_SCORE_MAX / 4 * 3; |
||||
return 0; |
||||
} |
||||
|
||||
static int epaf_read_header(AVFormatContext *s) |
||||
{ |
||||
int le, sample_rate, codec, channels; |
||||
AVStream *st; |
||||
|
||||
avio_skip(s->pb, 4); |
||||
if (avio_rl32(s->pb)) |
||||
return AVERROR_INVALIDDATA; |
||||
|
||||
le = avio_rl32(s->pb); |
||||
if (le && le != 1) |
||||
return AVERROR_INVALIDDATA; |
||||
|
||||
if (le) { |
||||
sample_rate = avio_rl32(s->pb); |
||||
codec = avio_rl32(s->pb); |
||||
channels = avio_rl32(s->pb); |
||||
} else { |
||||
sample_rate = avio_rb32(s->pb); |
||||
codec = avio_rb32(s->pb); |
||||
channels = avio_rb32(s->pb); |
||||
} |
||||
|
||||
if (!channels || !sample_rate) |
||||
return AVERROR_INVALIDDATA; |
||||
|
||||
st = avformat_new_stream(s, NULL); |
||||
if (!st) |
||||
return AVERROR(ENOMEM); |
||||
|
||||
st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
||||
st->codec->channels = channels; |
||||
st->codec->sample_rate = sample_rate; |
||||
switch (codec) { |
||||
case 0: |
||||
st->codec->codec_id = le ? AV_CODEC_ID_PCM_S16LE : AV_CODEC_ID_PCM_S16BE; |
||||
break; |
||||
case 2: |
||||
st->codec->codec_id = AV_CODEC_ID_PCM_S8; |
||||
break; |
||||
case 1: |
||||
av_log_missing_feature(s, "24-bit Paris PCM format", 1); |
||||
default: |
||||
return AVERROR_INVALIDDATA; |
||||
} |
||||
|
||||
st->codec->bits_per_coded_sample = av_get_bits_per_sample(st->codec->codec_id); |
||||
st->codec->block_align = st->codec->bits_per_coded_sample * st->codec->channels / 8; |
||||
|
||||
avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate); |
||||
|
||||
if (avio_skip(s->pb, 2024) < 0) |
||||
return AVERROR_INVALIDDATA; |
||||
return 0; |
||||
} |
||||
|
||||
AVInputFormat ff_epaf_demuxer = { |
||||
.name = "epaf", |
||||
.long_name = NULL_IF_CONFIG_SMALL("Ensoniq Paris Audio File"), |
||||
.read_probe = epaf_probe, |
||||
.read_header = epaf_read_header, |
||||
.read_packet = ff_pcm_read_packet, |
||||
.read_seek = ff_pcm_read_seek, |
||||
.extensions = "paf,fap", |
||||
.flags = AVFMT_GENERIC_INDEX, |
||||
}; |
Loading…
Reference in new issue