Commit 9abf2433 authored by Aurelien Jacobs's avatar Aurelien Jacobs
Browse files

add support for demuxing Electronic Arts .cdata files

based on a patch from Peter Ross

Originally committed as revision 10914 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent 271b4095
......@@ -41,6 +41,7 @@ OBJS-$(CONFIG_DV_DEMUXER) += dv.o
OBJS-$(CONFIG_DV_MUXER) += dvenc.o
OBJS-$(CONFIG_DV1394_DEMUXER) += dv1394.o dv.o
OBJS-$(CONFIG_DXA_DEMUXER) += dxa.o riff.o
OBJS-$(CONFIG_EA_CDATA_DEMUXER) += eacdata.o
OBJS-$(CONFIG_EA_DEMUXER) += electronicarts.o
OBJS-$(CONFIG_FFM_DEMUXER) += ffm.o
OBJS-$(CONFIG_FFM_MUXER) += ffm.o
......
......@@ -74,6 +74,7 @@ void av_register_all(void)
REGISTER_DEMUXER (DV1394, dv1394);
REGISTER_DEMUXER (DXA, dxa);
REGISTER_DEMUXER (EA, ea);
REGISTER_DEMUXER (EA_CDATA, ea_cdata);
REGISTER_MUXDEMUX (FFM, ffm);
REGISTER_MUXDEMUX (FLAC, flac);
REGISTER_DEMUXER (FLIC, flic);
......
/*
* Electronic Arts .cdata file Demuxer
* Copyright (c) 2007 Peter Ross
*
* 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
*/
/**
* @file eacdata.c
* Electronic Arts cdata Format Demuxer
* by Peter Ross (suxen_drol at hotmail dot com)
*
* Technical details here:
* http://wiki.multimedia.cx/index.php?title=EA_Command_And_Conquer_3_Audio_Codec
*/
#include "avformat.h"
typedef struct {
unsigned int channels;
unsigned int audio_pts;
} CdataDemuxContext;
static int cdata_probe(AVProbeData *p)
{
const uint8_t *b = p->buf;
if (b[0] == 0x04 && (b[1] == 0x00 || b[1] == 0x04 || b[1] == 0x0C))
return AVPROBE_SCORE_MAX/8;
return 0;
}
static int cdata_read_header(AVFormatContext *s, AVFormatParameters *ap)
{
CdataDemuxContext *cdata = s->priv_data;
ByteIOContext *pb = &s->pb;
unsigned int sample_rate, header;
AVStream *st;
header = get_be16(pb);
switch (header) {
case 0x0400: cdata->channels = 1; break;
case 0x0404: cdata->channels = 2; break;
case 0x040C: cdata->channels = 4; break;
default:
av_log(s, AV_LOG_INFO, "unknown header 0x%04x\n", header);
return -1;
};
sample_rate = get_be16(pb);
url_fskip(pb, 12);
st = av_new_stream(s, 0);
if (!st)
return AVERROR(ENOMEM);
st->codec->codec_type = CODEC_TYPE_AUDIO;
st->codec->codec_tag = 0; /* no fourcc */
st->codec->codec_id = CODEC_ID_ADPCM_EA_XAS;
st->codec->channels = cdata->channels;
st->codec->sample_rate = sample_rate;
av_set_pts_info(st, 64, 1, sample_rate);
cdata->audio_pts = 0;
return 0;
}
static int cdata_read_packet(AVFormatContext *s, AVPacket *pkt)
{
CdataDemuxContext *cdata = s->priv_data;
int packet_size = 76*cdata->channels;
if (av_get_packet(&s->pb, pkt, packet_size) != packet_size)
return AVERROR(EIO);
pkt->pts = cdata->audio_pts++;
return 1;
}
AVInputFormat ea_cdata_demuxer = {
"ea_cdata",
"Electronic Arts cdata",
sizeof(CdataDemuxContext),
cdata_probe,
cdata_read_header,
cdata_read_packet,
.extensions = "cdata",
};
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment