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88 lines
2.6 KiB
88 lines
2.6 KiB
/* |
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* WADY demuxer |
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* Copyright (c) 2023 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 "demux.h" |
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#include "internal.h" |
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#include "pcm.h" |
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static int wady_probe(const AVProbeData *p) |
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{ |
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if (AV_RL32(p->buf) != MKTAG('W','A','D','Y')) |
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return 0; |
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if (p->buf[4] != 0 || p->buf[5] == 0 || |
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AV_RL16(p->buf+6) == 0 || |
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AV_RL16(p->buf+6) > 2 || |
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(int32_t)AV_RL32(p->buf+8) <= 0) |
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return 0; |
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return AVPROBE_SCORE_MAX / 3 * 2; |
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} |
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static int wady_read_header(AVFormatContext *s) |
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{ |
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AVIOContext *pb = s->pb; |
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AVCodecParameters *par; |
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int channels, ret; |
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AVStream *st; |
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avio_skip(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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avio_skip(pb, 1); |
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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_WADY_DPCM; |
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par->format = AV_SAMPLE_FMT_S16; |
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if ((ret = ff_get_extradata(s, par, pb, 1)) < 0) |
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return ret; |
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channels = avio_rl16(pb); |
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if (channels == 0) |
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return AVERROR_INVALIDDATA; |
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av_channel_layout_default(&par->ch_layout, channels); |
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par->sample_rate = avio_rl32(pb); |
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if (par->sample_rate <= 0) |
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return AVERROR_INVALIDDATA; |
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avio_skip(pb, 4); |
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st->duration = avio_rl32(pb); |
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par->block_align = channels; |
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avpriv_set_pts_info(st, 64, 1, par->sample_rate); |
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avio_seek(pb, 0x30, SEEK_SET); |
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return 0; |
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} |
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const AVInputFormat ff_wady_demuxer = { |
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.name = "wady", |
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.long_name = NULL_IF_CONFIG_SMALL("Marble WADY"), |
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.read_probe = wady_probe, |
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.read_header = wady_read_header, |
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.read_packet = ff_pcm_read_packet, |
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.read_seek = ff_pcm_read_seek, |
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.flags = AVFMT_GENERIC_INDEX, |
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.extensions = "way", |
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};
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