mirror of https://github.com/FFmpeg/FFmpeg.git
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8a4c3f5258
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56a3a3f01c
5 changed files with 182 additions and 2 deletions
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/*
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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 "avformat.h" |
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#include "internal.h" |
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static int musx_probe(AVProbeData *p) |
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{ |
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if (memcmp(p->buf, "MUSX", 4)) |
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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->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
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st->codec->codec_id = AV_CODEC_ID_ADPCM_PSX; |
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st->codec->channels = 2; |
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st->codec->sample_rate = 32000; |
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st->codec->block_align = 0x80 * st->codec->channels; |
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} else if (version == 10) { |
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type = avio_rl32(s->pb); |
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st->codec->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->codec->channels = 2; |
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st->codec->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->codec->channels = avio_rl32(s->pb); |
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if (st->codec->channels <= 0 || |
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st->codec->channels > INT_MAX / 0x20) |
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return AVERROR_INVALIDDATA; |
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st->codec->sample_rate = avio_rl32(s->pb); |
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} |
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st->codec->codec_id = AV_CODEC_ID_ADPCM_IMA_DAT4; |
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st->codec->block_align = 0x20 * st->codec->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->codec->codec_id = AV_CODEC_ID_ADPCM_IMA_DAT4; |
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st->codec->channels = avio_rl32(s->pb); |
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if (st->codec->channels <= 0 || |
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st->codec->channels > INT_MAX / 0x20) |
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return AVERROR_INVALIDDATA; |
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st->codec->sample_rate = avio_rl32(s->pb); |
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st->codec->block_align = 0x20 * st->codec->channels; |
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break; |
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case MKTAG('X', 'E', '_', '_'): |
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st->codec->codec_id = AV_CODEC_ID_ADPCM_IMA_DAT4; |
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st->codec->channels = 2; |
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st->codec->sample_rate = 32000; |
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st->codec->block_align = 0x20 * st->codec->channels; |
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break; |
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case MKTAG('P', 'S', 'P', '_'): |
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st->codec->codec_id = AV_CODEC_ID_ADPCM_PSX; |
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st->codec->channels = 2; |
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st->codec->sample_rate = 32768; |
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st->codec->block_align = 0x80 * st->codec->channels; |
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break; |
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case MKTAG('P', 'S', '2', '_'): |
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st->codec->codec_id = AV_CODEC_ID_ADPCM_PSX; |
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st->codec->channels = 2; |
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st->codec->sample_rate = 32000; |
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st->codec->block_align = 0x80 * st->codec->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->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
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st->codec->channels = 2; |
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switch (type) { |
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case MKTAG('G', 'C', '_', '_'): |
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st->codec->codec_id = AV_CODEC_ID_ADPCM_IMA_DAT4; |
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st->codec->block_align = 0x20 * st->codec->channels; |
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st->codec->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->codec->codec_id = AV_CODEC_ID_ADPCM_PSX; |
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st->codec->block_align = 0x80 * st->codec->channels; |
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st->codec->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->codec->codec_id = AV_CODEC_ID_ADPCM_IMA_DAT4; |
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st->codec->block_align = 0x20 * st->codec->channels; |
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st->codec->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->codec->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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AVCodecContext *codec = s->streams[0]->codec; |
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return av_get_packet(s->pb, pkt, codec->block_align); |
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} |
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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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