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: |
avpriv_request_sample(s, "24-bit Paris PCM format"); |
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, |
}; |