mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
88 lines
2.6 KiB
C
88 lines
2.6 KiB
C
/*
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* FWSE demuxer
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* Copyright (c) 2020 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/channel_layout.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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#include "pcm.h"
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static int fwse_probe(const AVProbeData *p)
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{
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if (AV_RL32(p->buf) != MKTAG('F','W','S','E'))
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return 0;
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if (AV_RL32(p->buf+4) != 2 && AV_RL32(p->buf+4) != 3)
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return 0;
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if (AV_RL32(p->buf+16) != 1 && AV_RL32(p->buf+16) != 2)
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return 0;
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return AVPROBE_SCORE_MAX / 4 * 3;
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}
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static int fwse_read_header(AVFormatContext *s)
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{
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unsigned start_offset, version;
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int channels;
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AVIOContext *pb = s->pb;
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AVCodecParameters *par;
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AVStream *st;
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avio_skip(pb, 4);
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version = avio_rl32(pb);
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if (version != 2 && version != 3)
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return AVERROR_INVALIDDATA;
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avio_skip(pb, 4);
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start_offset = avio_rl32(pb);
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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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par = st->codecpar;
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par->codec_type = AVMEDIA_TYPE_AUDIO;
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par->codec_id = AV_CODEC_ID_ADPCM_IMA_MTF;
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par->format = AV_SAMPLE_FMT_S16;
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channels = avio_rl32(pb);
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if (channels != 1 && channels != 2)
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return AVERROR_INVALIDDATA;
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av_channel_layout_default(&par->ch_layout, channels);
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st->duration = avio_rl32(pb);
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par->sample_rate = avio_rl32(pb);
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if (par->sample_rate <= 0 || par->sample_rate > INT_MAX)
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return AVERROR_INVALIDDATA;
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par->block_align = 1;
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avio_skip(pb, start_offset - avio_tell(pb));
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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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const AVInputFormat ff_fwse_demuxer = {
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.name = "fwse",
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.long_name = NULL_IF_CONFIG_SMALL("Capcom's MT Framework sound"),
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.read_probe = fwse_probe,
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.read_header = fwse_read_header,
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.read_packet = ff_pcm_read_packet,
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.extensions = "fwse",
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};
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