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/*
* RSD demuxer
* Copyright (c) 2013 James Almer
*
* 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 "libavcodec/bytestream.h"
#include "libavutil/intreadwrite.h"
#include "avformat.h"
#include "avio.h"
#include "internal.h"
static const AVCodecTag rsd_tags[] = {
{ AV_CODEC_ID_ADPCM_THP, MKTAG('G','A','D','P') },
{ AV_CODEC_ID_ADPCM_IMA_RAD, MKTAG('R','A','D','P') },
{ AV_CODEC_ID_PCM_S16BE, MKTAG('P','C','M','B') },
{ AV_CODEC_ID_PCM_S16LE, MKTAG('P','C','M',' ') },
{ AV_CODEC_ID_NONE, 0 },
};
static const uint32_t rsd_unsupported_tags[] = {
MKTAG('O','G','G',' '),
MKTAG('V','A','G',' '),
MKTAG('W','A','D','P'),
MKTAG('X','A','D','P'),
MKTAG('X','M','A',' '),
};
static int rsd_probe(AVProbeData *p)
{
if (!memcmp(p->buf, "RSD", 3) &&
p->buf[3] - '0' >= 2 && p->buf[3] - '0' <= 6)
return AVPROBE_SCORE_EXTENSION;
return 0;
}
static int rsd_read_header(AVFormatContext *s)
{
AVIOContext *pb = s->pb;
int i, version, start = 0x800;
AVCodecContext *codec;
AVStream *st = avformat_new_stream(s, NULL);
if (!st)
return AVERROR(ENOMEM);
avio_skip(pb, 3); // "RSD"
version = avio_r8(pb) - '0';
codec = st->codec;
codec->codec_type = AVMEDIA_TYPE_AUDIO;
codec->codec_tag = avio_rl32(pb);
codec->codec_id = ff_codec_get_id(rsd_tags, codec->codec_tag);
if (!codec->codec_id) {
char tag_buf[32];
av_get_codec_tag_string(tag_buf, sizeof(tag_buf), codec->codec_tag);
for (i=0; i < FF_ARRAY_ELEMS(rsd_unsupported_tags); i++) {
if (codec->codec_tag == rsd_unsupported_tags[i]) {
avpriv_request_sample(s, "Codec tag: %s", tag_buf);
return AVERROR_PATCHWELCOME;
}
}
av_log(s, AV_LOG_ERROR, "Unknown codec tag: %s\n", tag_buf);
return AVERROR_INVALIDDATA;
}
codec->channels = avio_rl32(pb);
if (!codec->channels)
return AVERROR_INVALIDDATA;
avio_skip(pb, 4); // Bit depth
codec->sample_rate = avio_rl32(pb);
if (!codec->sample_rate)
return AVERROR_INVALIDDATA;
avio_skip(pb, 4); // Unknown
switch (codec->codec_id) {
case AV_CODEC_ID_ADPCM_IMA_RAD:
codec->block_align = 20 * codec->channels;
if (pb->seekable)
st->duration = av_get_audio_frame_duration(codec, avio_size(pb) - start);
break;
case AV_CODEC_ID_ADPCM_THP:
/* RSD3GADP is mono, so only alloc enough memory
to store the coeff table for a single channel. */
if (ff_alloc_extradata(codec, 32))
return AVERROR(ENOMEM);
start = avio_rl32(pb);
if (avio_read(s->pb, codec->extradata, 32) != 32)
return AVERROR_INVALIDDATA;
for (i = 0; i < 16; i++)
AV_WB16(codec->extradata + i * 2, AV_RL16(codec->extradata + i * 2));
if (pb->seekable)
st->duration = (avio_size(pb) - start) / 8 * 14;
break;
case AV_CODEC_ID_PCM_S16LE:
case AV_CODEC_ID_PCM_S16BE:
if (version != 4)
start = avio_rl32(pb);
if (pb->seekable)
st->duration = (avio_size(pb) - start) / 2 / codec->channels;
break;
}
avio_skip(pb, start - avio_tell(pb));
avpriv_set_pts_info(st, 64, 1, codec->sample_rate);
return 0;
}
static int rsd_read_packet(AVFormatContext *s, AVPacket *pkt)
{
AVCodecContext *codec = s->streams[0]->codec;
int ret, size = 1024;
if (url_feof(s->pb))
return AVERROR_EOF;
if (codec->codec_id == AV_CODEC_ID_ADPCM_IMA_RAD)
ret = av_get_packet(s->pb, pkt, codec->block_align);
else
ret = av_get_packet(s->pb, pkt, size);
if (ret != size) {
if (ret < 0) {
av_free_packet(pkt);
return ret;
}
av_shrink_packet(pkt, ret);
}
pkt->stream_index = 0;
return ret;
}
AVInputFormat ff_rsd_demuxer = {
.name = "rsd",
.long_name = NULL_IF_CONFIG_SMALL("GameCube RSD"),
.read_probe = rsd_probe,
.read_header = rsd_read_header,
.read_packet = rsd_read_packet,
.extensions = "rsd",
.codec_tag = (const AVCodecTag* const []){rsd_tags, 0},
};
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