198 lines
6.2 KiB
C
198 lines
6.2 KiB
C
/*
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* RSD demuxer
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* Copyright (c) 2013 James Almer
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavcodec/bytestream.h"
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#include "libavutil/intreadwrite.h"
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#include "avformat.h"
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#include "avio.h"
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#include "internal.h"
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static const AVCodecTag rsd_tags[] = {
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{ AV_CODEC_ID_ADPCM_THP, MKTAG('G','A','D','P') },
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{ AV_CODEC_ID_ADPCM_THP, MKTAG('W','A','D','P') },
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{ AV_CODEC_ID_ADPCM_IMA_RAD, MKTAG('R','A','D','P') },
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{ AV_CODEC_ID_ADPCM_IMA_WAV, MKTAG('X','A','D','P') },
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{ AV_CODEC_ID_PCM_S16BE, MKTAG('P','C','M','B') },
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{ AV_CODEC_ID_PCM_S16LE, MKTAG('P','C','M',' ') },
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{ AV_CODEC_ID_NONE, 0 },
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};
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static const uint32_t rsd_unsupported_tags[] = {
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MKTAG('O','G','G',' '),
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MKTAG('V','A','G',' '),
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MKTAG('X','M','A',' '),
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};
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static int rsd_probe(AVProbeData *p)
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{
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if (memcmp(p->buf, "RSD", 3) || p->buf[3] - '0' < 2 || p->buf[3] - '0' > 6)
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return 0;
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if (AV_RL32(p->buf + 8) > 256 || !AV_RL32(p->buf + 8))
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return AVPROBE_SCORE_MAX / 8;
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if (AV_RL32(p->buf + 16) > 8*48000 || !AV_RL32(p->buf + 16))
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return AVPROBE_SCORE_MAX / 8;
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return AVPROBE_SCORE_MAX;
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}
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static int rsd_read_header(AVFormatContext *s)
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{
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AVIOContext *pb = s->pb;
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int i, version, start = 0x800;
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AVCodecContext *codec;
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AVStream *st = avformat_new_stream(s, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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avio_skip(pb, 3); // "RSD"
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version = avio_r8(pb) - '0';
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codec = st->codec;
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codec->codec_type = AVMEDIA_TYPE_AUDIO;
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codec->codec_tag = avio_rl32(pb);
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codec->codec_id = ff_codec_get_id(rsd_tags, codec->codec_tag);
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if (!codec->codec_id) {
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char tag_buf[32];
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av_get_codec_tag_string(tag_buf, sizeof(tag_buf), codec->codec_tag);
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for (i=0; i < FF_ARRAY_ELEMS(rsd_unsupported_tags); i++) {
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if (codec->codec_tag == rsd_unsupported_tags[i]) {
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avpriv_request_sample(s, "Codec tag: %s", tag_buf);
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return AVERROR_PATCHWELCOME;
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}
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}
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av_log(s, AV_LOG_ERROR, "Unknown codec tag: %s\n", tag_buf);
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return AVERROR_INVALIDDATA;
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}
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codec->channels = avio_rl32(pb);
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if (!codec->channels)
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return AVERROR_INVALIDDATA;
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avio_skip(pb, 4); // Bit depth
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codec->sample_rate = avio_rl32(pb);
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if (!codec->sample_rate)
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return AVERROR_INVALIDDATA;
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avio_skip(pb, 4); // Unknown
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switch (codec->codec_id) {
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case AV_CODEC_ID_ADPCM_IMA_RAD:
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codec->block_align = 20 * codec->channels;
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if (pb->seekable)
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st->duration = av_get_audio_frame_duration(codec, avio_size(pb) - start);
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break;
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case AV_CODEC_ID_ADPCM_IMA_WAV:
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if (version == 2)
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start = avio_rl32(pb);
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codec->bits_per_coded_sample = 4;
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codec->block_align = 36 * codec->channels;
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if (pb->seekable)
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st->duration = av_get_audio_frame_duration(codec, avio_size(pb) - start);
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break;
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case AV_CODEC_ID_ADPCM_THP:
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if (st->codec->codec_tag == MKTAG('G','A','D','P')) {
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/* RSD3GADP is mono, so only alloc enough memory
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to store the coeff table for a single channel. */
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start = avio_rl32(pb);
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if (ff_get_extradata(codec, s->pb, 32) < 0)
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return AVERROR(ENOMEM);
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for (i = 0; i < 16; i++)
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AV_WB16(codec->extradata + i * 2, AV_RL16(codec->extradata + i * 2));
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} else {
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codec->block_align = 8 * codec->channels;
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avio_skip(s->pb, 0x1A4 - avio_tell(s->pb));
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if (ff_alloc_extradata(st->codec, 32 * st->codec->channels) < 0)
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return AVERROR(ENOMEM);
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for (i = 0; i < st->codec->channels; i++) {
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avio_read(s->pb, st->codec->extradata + 32 * i, 32);
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avio_skip(s->pb, 8);
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}
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}
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if (pb->seekable)
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st->duration = (avio_size(pb) - start) / (8 * st->codec->channels) * 14;
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break;
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case AV_CODEC_ID_PCM_S16LE:
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case AV_CODEC_ID_PCM_S16BE:
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if (version != 4)
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start = avio_rl32(pb);
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if (pb->seekable)
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st->duration = (avio_size(pb) - start) / 2 / codec->channels;
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break;
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}
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avio_skip(pb, start - avio_tell(pb));
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avpriv_set_pts_info(st, 64, 1, codec->sample_rate);
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return 0;
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}
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static int rsd_read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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AVCodecContext *codec = s->streams[0]->codec;
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int ret, size = 1024;
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if (avio_feof(s->pb))
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return AVERROR_EOF;
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if (codec->codec_id == AV_CODEC_ID_ADPCM_IMA_RAD ||
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codec->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV) {
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ret = av_get_packet(s->pb, pkt, codec->block_align);
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} else if (codec->codec_tag == MKTAG('W','A','D','P') &&
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codec->channels > 1) {
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int i, ch;
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av_new_packet(pkt, codec->block_align);
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for (i = 0; i < 4; i++) {
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for (ch = 0; ch < codec->channels; ch++) {
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pkt->data[ch * 8 + i * 2 + 0] = avio_r8(s->pb);
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pkt->data[ch * 8 + i * 2 + 1] = avio_r8(s->pb);
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}
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}
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ret = 0;
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} else {
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ret = av_get_packet(s->pb, pkt, size);
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}
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pkt->stream_index = 0;
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return ret;
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}
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AVInputFormat ff_rsd_demuxer = {
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.name = "rsd",
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.long_name = NULL_IF_CONFIG_SMALL("GameCube RSD"),
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.read_probe = rsd_probe,
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.read_header = rsd_read_header,
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.read_packet = rsd_read_packet,
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.extensions = "rsd",
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.codec_tag = (const AVCodecTag* const []){rsd_tags, 0},
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};
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