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avformat: Add black ops audio demuxer

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Fixes Ticket2064

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-04-22 23:39:46 +02:00
parent 7f138310fb
commit 0fb64da63f
3 changed files with 80 additions and 0 deletions
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1
libavformat/Makefile
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@ -91,6 +91,7 @@ OBJS-$(CONFIG_BINTEXT_DEMUXER) += bintext.o sauce.o
OBJS-$(CONFIG_BIT_DEMUXER) += bit.o
OBJS-$(CONFIG_BIT_MUXER) += bit.o
OBJS-$(CONFIG_BMV_DEMUXER) += bmv.o
OBJS-$(CONFIG_BOA_DEMUXER) += boadec.o
OBJS-$(CONFIG_BRSTM_DEMUXER) += brstm.o
OBJS-$(CONFIG_C93_DEMUXER) += c93.o vocdec.o voc.o
OBJS-$(CONFIG_CAF_DEMUXER) += cafdec.o caf.o mov.o mov_chan.o \

1
libavformat/allformats.c
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@ -92,6 +92,7 @@ void av_register_all(void)
REGISTER_MUXDEMUX(BIT, bit);
REGISTER_DEMUXER (BMV, bmv);
REGISTER_DEMUXER (BRSTM, brstm);
REGISTER_DEMUXER (BOA, boa);
REGISTER_DEMUXER (C93, c93);
REGISTER_MUXDEMUX(CAF, caf);
REGISTER_MUXDEMUX(CAVSVIDEO, cavsvideo);

78
libavformat/boadec.c Normal file
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@ -0,0 +1,78 @@
/*
* Black ops audio demuxer
* Copyright (c) 2013 Michael Niedermayer
*
* 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"
static int probe(AVProbeData *p)
{
if (p->buf_size < 2096)
return 0;
if ( AV_RL32(p->buf ) != 1
|| AV_RL32(p->buf + 8) > 100000
|| AV_RL32(p->buf + 12) > 8
|| AV_RL32(p->buf + 16) != 2096
||!AV_RL32(p->buf + 21)
|| AV_RL16(p->buf + 25) != 2096
|| AV_RL32(p->buf + 48) % AV_RL32(p->buf + 21)
)
return 0;
return AVPROBE_SCORE_MAX / 2;
}
static int read_header(AVFormatContext *s)
{
AVStream *st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
st->codec->codec_id = AV_CODEC_ID_ADPCM_MS;
avio_rl32(s->pb);
avio_rl32(s->pb);
st->codec->sample_rate = avio_rl32(s->pb);
st->codec->channels = avio_rl32(s->pb);
s->data_offset = avio_rl32(s->pb);
avio_r8(s->pb);
st->codec->block_align = st->codec->channels * avio_rl32(s->pb);
avio_seek(s->pb, s->data_offset, SEEK_SET);
return 0;
}
static int read_packet(AVFormatContext *s, AVPacket *pkt)
{
AVStream *st = s->streams[0];
return av_get_packet(s->pb, pkt, st->codec->block_align);
}
AVInputFormat ff_boa_demuxer = {
.name = "boa",
.long_name = NULL_IF_CONFIG_SMALL("Black Ops Audio"),
.read_probe = probe,
.read_header = read_header,
.read_packet = read_packet,
.flags = AVFMT_GENERIC_INDEX,
};