mirror of
https://git.ffmpeg.org/ffmpeg.git
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189 lines
6.9 KiB
C
189 lines
6.9 KiB
C
/*
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* MUSX demuxer
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* Copyright (c) 2016 Paul B Mahol
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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 "libavutil/avassert.h"
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#include "libavutil/intreadwrite.h"
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#include "avformat.h"
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#include "internal.h"
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static int musx_probe(const AVProbeData *p)
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{
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unsigned version;
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if (AV_RB32(p->buf) != MKBETAG('M','U','S','X'))
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return 0;
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version = AV_RL32(p->buf + 8);
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if (version != 10 &&
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version != 6 &&
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version != 5 &&
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version != 4 &&
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version != 201)
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return 0;
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return AVPROBE_SCORE_MAX / 5 * 2;
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}
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static int musx_read_header(AVFormatContext *s)
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{
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unsigned type, version, coding, offset;
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AVStream *st;
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avio_skip(s->pb, 8);
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version = avio_rl32(s->pb);
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if (version != 10 &&
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version != 6 &&
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version != 5 &&
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version != 4 &&
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version != 201) {
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avpriv_request_sample(s, "Unsupported version: %d", version);
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return AVERROR_PATCHWELCOME;
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}
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avio_skip(s->pb, 4);
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st = avformat_new_stream(s, NULL);
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if (!st)
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return AVERROR(ENOMEM);
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if (version == 201) {
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avio_skip(s->pb, 8);
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offset = avio_rl32(s->pb);
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st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
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st->codecpar->codec_id = AV_CODEC_ID_ADPCM_PSX;
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st->codecpar->ch_layout.nb_channels = 2;
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st->codecpar->sample_rate = 32000;
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st->codecpar->block_align = 0x80 * st->codecpar->ch_layout.nb_channels;
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} else if (version == 10) {
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type = avio_rl32(s->pb);
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st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
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offset = 0x800;
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switch (type) {
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case MKTAG('P', 'S', '3', '_'):
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st->codecpar->ch_layout.nb_channels = 2;
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st->codecpar->sample_rate = 44100;
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avio_skip(s->pb, 44);
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coding = avio_rl32(s->pb);
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if (coding == MKTAG('D', 'A', 'T', '4') ||
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coding == MKTAG('D', 'A', 'T', '8')) {
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avio_skip(s->pb, 4);
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st->codecpar->ch_layout.nb_channels = avio_rl32(s->pb);
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if (st->codecpar->ch_layout.nb_channels <= 0 ||
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st->codecpar->ch_layout.nb_channels > INT_MAX / 0x20)
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return AVERROR_INVALIDDATA;
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st->codecpar->sample_rate = avio_rl32(s->pb);
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}
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st->codecpar->codec_id = AV_CODEC_ID_ADPCM_IMA_DAT4;
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st->codecpar->block_align = 0x20 * st->codecpar->ch_layout.nb_channels;
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break;
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case MKTAG('W', 'I', 'I', '_'):
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avio_skip(s->pb, 44);
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coding = avio_rl32(s->pb);
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if (coding != MKTAG('D', 'A', 'T', '4') &&
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coding != MKTAG('D', 'A', 'T', '8')) {
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avpriv_request_sample(s, "Unsupported coding: %X", coding);
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return AVERROR_PATCHWELCOME;
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}
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avio_skip(s->pb, 4);
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st->codecpar->codec_id = AV_CODEC_ID_ADPCM_IMA_DAT4;
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st->codecpar->ch_layout.nb_channels = avio_rl32(s->pb);
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if (st->codecpar->ch_layout.nb_channels <= 0 ||
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st->codecpar->ch_layout.nb_channels > INT_MAX / 0x20)
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return AVERROR_INVALIDDATA;
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st->codecpar->sample_rate = avio_rl32(s->pb);
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st->codecpar->block_align = 0x20 * st->codecpar->ch_layout.nb_channels;
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break;
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case MKTAG('X', 'E', '_', '_'):
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st->codecpar->codec_id = AV_CODEC_ID_ADPCM_IMA_DAT4;
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st->codecpar->ch_layout.nb_channels = 2;
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st->codecpar->sample_rate = 32000;
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st->codecpar->block_align = 0x20 * st->codecpar->ch_layout.nb_channels;
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break;
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case MKTAG('P', 'S', 'P', '_'):
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st->codecpar->codec_id = AV_CODEC_ID_ADPCM_PSX;
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st->codecpar->ch_layout.nb_channels = 2;
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st->codecpar->sample_rate = 32768;
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st->codecpar->block_align = 0x80 * st->codecpar->ch_layout.nb_channels;
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break;
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case MKTAG('P', 'S', '2', '_'):
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st->codecpar->codec_id = AV_CODEC_ID_ADPCM_PSX;
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st->codecpar->ch_layout.nb_channels = 2;
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st->codecpar->sample_rate = 32000;
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st->codecpar->block_align = 0x80 * st->codecpar->ch_layout.nb_channels;
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break;
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default:
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avpriv_request_sample(s, "Unsupported type: %X", type);
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return AVERROR_PATCHWELCOME;
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}
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} else if (version == 6 || version == 5 || version == 4) {
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type = avio_rl32(s->pb);
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avio_skip(s->pb, 20);
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st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
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st->codecpar->ch_layout.nb_channels = 2;
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switch (type) {
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case MKTAG('G', 'C', '_', '_'):
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st->codecpar->codec_id = AV_CODEC_ID_ADPCM_IMA_DAT4;
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st->codecpar->block_align = 0x20 * st->codecpar->ch_layout.nb_channels;
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st->codecpar->sample_rate = 32000;
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offset = avio_rb32(s->pb);
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break;
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case MKTAG('P', 'S', '2', '_'):
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st->codecpar->codec_id = AV_CODEC_ID_ADPCM_PSX;
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st->codecpar->block_align = 0x80 * st->codecpar->ch_layout.nb_channels;
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st->codecpar->sample_rate = 32000;
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offset = avio_rl32(s->pb);
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break;
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case MKTAG('X', 'B', '_', '_'):
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st->codecpar->codec_id = AV_CODEC_ID_ADPCM_IMA_DAT4;
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st->codecpar->block_align = 0x20 * st->codecpar->ch_layout.nb_channels;
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st->codecpar->sample_rate = 44100;
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offset = avio_rl32(s->pb);
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break;
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default:
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avpriv_request_sample(s, "Unsupported type: %X", type);
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return AVERROR_PATCHWELCOME;
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}
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} else {
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av_assert0(0);
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}
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avio_seek(s->pb, offset, SEEK_SET);
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avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
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return 0;
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}
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static int musx_read_packet(AVFormatContext *s, AVPacket *pkt)
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{
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AVCodecParameters *par = s->streams[0]->codecpar;
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return av_get_packet(s->pb, pkt, par->block_align);
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}
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const AVInputFormat ff_musx_demuxer = {
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.name = "musx",
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.long_name = NULL_IF_CONFIG_SMALL("Eurocom MUSX"),
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.read_probe = musx_probe,
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.read_header = musx_read_header,
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.read_packet = musx_read_packet,
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.extensions = "musx",
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};
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