mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-02 03:06:28 +02:00
233 lines
7.5 KiB
C
233 lines
7.5 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_PSX, MKTAG('V','A','G',' ') },
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{ AV_CODEC_ID_ADPCM_THP_LE, 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_XMA2, MKTAG('X','M','A',' ') },
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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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};
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static int rsd_probe(const 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, ret, version, start = 0x800;
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AVCodecParameters *par;
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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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par = st->codecpar;
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par->codec_type = AVMEDIA_TYPE_AUDIO;
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par->codec_tag = avio_rl32(pb);
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par->codec_id = ff_codec_get_id(rsd_tags, par->codec_tag);
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if (!par->codec_id) {
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const char *tag_buf = av_fourcc2str(par->codec_tag);
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for (i=0; i < FF_ARRAY_ELEMS(rsd_unsupported_tags); i++) {
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if (par->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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par->ch_layout.nb_channels = avio_rl32(pb);
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if (par->ch_layout.nb_channels <= 0 || par->ch_layout.nb_channels > INT_MAX / 36) {
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av_log(s, AV_LOG_ERROR, "Invalid number of channels: %d\n", par->ch_layout.nb_channels);
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return AVERROR_INVALIDDATA;
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}
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avio_skip(pb, 4); // Bit depth
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par->sample_rate = avio_rl32(pb);
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if (!par->sample_rate)
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return AVERROR_INVALIDDATA;
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avio_skip(pb, 4); // Unknown
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switch (par->codec_id) {
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case AV_CODEC_ID_XMA2:
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par->block_align = 2048;
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if ((ret = ff_alloc_extradata(par, 34)) < 0)
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return ret;
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memset(par->extradata, 0, 34);
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break;
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case AV_CODEC_ID_ADPCM_PSX:
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par->block_align = 16 * par->ch_layout.nb_channels;
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break;
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case AV_CODEC_ID_ADPCM_IMA_RAD:
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par->block_align = 20 * par->ch_layout.nb_channels;
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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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par->bits_per_coded_sample = 4;
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par->block_align = 36 * par->ch_layout.nb_channels;
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break;
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case AV_CODEC_ID_ADPCM_THP_LE:
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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 ((ret = ff_get_extradata(s, par, s->pb, 32)) < 0)
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return ret;
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break;
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case AV_CODEC_ID_ADPCM_THP:
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par->block_align = 8 * par->ch_layout.nb_channels;
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avio_skip(s->pb, 0x1A4 - avio_tell(s->pb));
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if ((ret = ff_alloc_extradata(st->codecpar, 32 * par->ch_layout.nb_channels)) < 0)
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return ret;
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for (i = 0; i < par->ch_layout.nb_channels; i++) {
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if (avio_feof(pb))
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return AVERROR_EOF;
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avio_read(s->pb, st->codecpar->extradata + 32 * i, 32);
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avio_skip(s->pb, 8);
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}
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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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break;
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}
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if (start < 0)
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return AVERROR_INVALIDDATA;
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if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
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int64_t remaining = avio_size(pb);
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if (remaining >= start && remaining - start <= INT_MAX)
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switch (par->codec_id) {
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case AV_CODEC_ID_ADPCM_PSX:
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case AV_CODEC_ID_ADPCM_IMA_RAD:
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case AV_CODEC_ID_ADPCM_IMA_WAV:
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case AV_CODEC_ID_ADPCM_THP_LE:
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st->duration = av_get_audio_frame_duration2(par, remaining - start);
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break;
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case AV_CODEC_ID_ADPCM_THP:
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st->duration = (remaining - start) / (8 * par->ch_layout.nb_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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st->duration = (remaining - start) / 2 / par->ch_layout.nb_channels;
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}
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}
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avio_skip(pb, start - avio_tell(pb));
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if (par->codec_id == AV_CODEC_ID_XMA2) {
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avio_skip(pb, avio_rb32(pb) + avio_rb32(pb));
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st->duration = avio_rb32(pb);
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}
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avpriv_set_pts_info(st, 64, 1, par->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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AVCodecParameters *par = s->streams[0]->codecpar;
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int ret, size = 1024;
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int64_t pos;
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if (avio_feof(s->pb))
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return AVERROR_EOF;
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pos = avio_tell(s->pb);
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if (par->codec_id == AV_CODEC_ID_ADPCM_IMA_RAD ||
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par->codec_id == AV_CODEC_ID_ADPCM_PSX ||
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par->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV ||
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par->codec_id == AV_CODEC_ID_XMA2) {
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ret = av_get_packet(s->pb, pkt, par->block_align);
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} else if (par->codec_tag == MKTAG('W','A','D','P') &&
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par->ch_layout.nb_channels > 1) {
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int i, ch;
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ret = av_new_packet(pkt, par->block_align);
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if (ret < 0)
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return ret;
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for (i = 0; i < 4; i++) {
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for (ch = 0; ch < par->ch_layout.nb_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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if (par->codec_id == AV_CODEC_ID_XMA2 && pkt->size >= 1)
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pkt->duration = (pkt->data[0] >> 2) * 512;
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pkt->pos = pos;
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pkt->stream_index = 0;
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return ret;
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}
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const 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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.flags = AVFMT_GENERIC_INDEX,
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};
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