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avformat: add ads demuxer

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2015-10-14 11:58:38 +02:00
parent c0aeee9443
commit 3919089beb
4 changed files with 92 additions and 1 deletions
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1
libavformat/Makefile
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@ -66,6 +66,7 @@ OBJS-$(CONFIG_AC3_MUXER) += rawenc.o
OBJS-$(CONFIG_ACT_DEMUXER) += act.o
OBJS-$(CONFIG_ADF_DEMUXER) += bintext.o sauce.o
OBJS-$(CONFIG_ADP_DEMUXER) += adp.o
OBJS-$(CONFIG_ADS_DEMUXER) += ads.o
OBJS-$(CONFIG_ADX_DEMUXER) += adxdec.o
OBJS-$(CONFIG_ADX_MUXER) += rawenc.o
OBJS-$(CONFIG_ADTS_MUXER) += adtsenc.o apetag.o img2.o \

89
libavformat/ads.c Normal file
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@ -0,0 +1,89 @@
/*
* ADS/SS2 demuxer
* Copyright (c) 2015 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/channel_layout.h"
#include "avformat.h"
#include "internal.h"
static int ads_probe(AVProbeData *p)
{
if (memcmp(p->buf, "SShd", 4) ||
memcmp(p->buf+32, "SSbd", 4))
return 0;
return AVPROBE_SCORE_MAX / 3 * 2;
}
static int ads_read_header(AVFormatContext *s)
{
int align, codec, size;
AVStream *st;
st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
avio_skip(s->pb, 8);
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
codec = avio_rl32(s->pb);
st->codec->sample_rate = avio_rl32(s->pb);
if (st->codec->sample_rate <= 0)
return AVERROR_INVALIDDATA;
st->codec->channels = avio_rl32(s->pb);
if (st->codec->channels <= 0)
return AVERROR_INVALIDDATA;
align = avio_rl32(s->pb);
if (align <= 0 || align > INT_MAX / st->codec->channels)
return AVERROR_INVALIDDATA;
if (codec == 1)
st->codec->codec_id = AV_CODEC_ID_PCM_S16LE_PLANAR;
else
st->codec->codec_id = AV_CODEC_ID_ADPCM_PSX;
st->codec->block_align = st->codec->channels * align;
avio_skip(s->pb, 12);
size = avio_rl32(s->pb);
if (st->codec->codec_id == AV_CODEC_ID_ADPCM_PSX)
st->duration = (size - 0x40) / 16 / st->codec->channels * 28;
avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
return 0;
}
static int ads_read_packet(AVFormatContext *s, AVPacket *pkt)
{
AVCodecContext *codec = s->streams[0]->codec;
int ret;
ret = av_get_packet(s->pb, pkt, codec->block_align);
pkt->stream_index = 0;
return ret;
}
AVInputFormat ff_ads_demuxer = {
.name = "ads",
.long_name = NULL_IF_CONFIG_SMALL("Sony ADS"),
.read_probe = ads_probe,
.read_header = ads_read_header,
.read_packet = ads_read_packet,
.extensions = "ads,ss2",
};

1
libavformat/allformats.c
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@ -66,6 +66,7 @@ void av_register_all(void)
REGISTER_DEMUXER (ACT, act);
REGISTER_DEMUXER (ADF, adf);
REGISTER_DEMUXER (ADP, adp);
REGISTER_DEMUXER (ADS, ads);
REGISTER_MUXER (ADTS, adts);
REGISTER_MUXDEMUX(ADX, adx);
REGISTER_DEMUXER (AEA, aea);

2
libavformat/version.h
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@ -30,7 +30,7 @@
#include "libavutil/version.h"
#define LIBAVFORMAT_VERSION_MAJOR 57
#define LIBAVFORMAT_VERSION_MINOR 6
#define LIBAVFORMAT_VERSION_MINOR 7
#define LIBAVFORMAT_VERSION_MICRO 100
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \