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62 lines
2.0 KiB
62 lines
2.0 KiB
/* |
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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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