mirror of
https://gitee.com/openharmony/third_party_ffmpeg
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63 lines
2.0 KiB
C
63 lines
2.0 KiB
C
/*
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* Copyright (c) 2015 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 "avformat.h"
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#include "internal.h"
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#include "pcm.h"
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static int wve_probe(const AVProbeData *p)
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{
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if (memcmp(p->buf, "ALawSoundFile**\0\017\020", 18) ||
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memcmp(p->buf + 22, "\0\0\0\1\0\0\0\0\0\0", 10))
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return 0;
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return AVPROBE_SCORE_MAX;
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}
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static int wve_read_header(AVFormatContext *s)
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{
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AVStream *st;
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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(s->pb, 18);
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st->duration = avio_rb32(s->pb);
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st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
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st->codecpar->codec_id = AV_CODEC_ID_PCM_ALAW;
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st->codecpar->sample_rate = 8000;
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st->codecpar->channels = 1;
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st->codecpar->bits_per_coded_sample = av_get_bits_per_sample(st->codecpar->codec_id);
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st->codecpar->block_align = st->codecpar->bits_per_coded_sample * st->codecpar->channels / 8;
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avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
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avio_skip(s->pb, 10);
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return 0;
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}
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const AVInputFormat ff_wve_demuxer = {
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.name = "wve",
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.long_name = NULL_IF_CONFIG_SMALL("Psion 3 audio"),
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.read_probe = wve_probe,
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.read_header = wve_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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};
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