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75 lines
2.2 KiB
75 lines
2.2 KiB
/* |
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* PVF demuxer |
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* Copyright (c) 2012 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 pvf_probe(AVProbeData *p) |
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{ |
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if (!memcmp(p->buf, "PVF1\n", 5)) |
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return AVPROBE_SCORE_MAX; |
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return 0; |
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} |
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static int pvf_read_header(AVFormatContext *s) |
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{ |
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char buffer[32]; |
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AVStream *st; |
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int bps, channels, sample_rate; |
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avio_skip(s->pb, 5); |
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ff_get_line(s->pb, buffer, sizeof(buffer)); |
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if (sscanf(buffer, "%d %d %d", |
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&channels, |
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&sample_rate, |
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&bps) != 3) |
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return AVERROR_INVALIDDATA; |
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if (channels <= 0 || bps <= 0 || sample_rate <= 0) |
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return AVERROR_INVALIDDATA; |
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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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st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
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st->codec->channels = channels; |
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st->codec->sample_rate = sample_rate; |
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st->codec->codec_id = ff_get_pcm_codec_id(bps, 0, 1, 0xFFFF); |
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st->codec->bits_per_coded_sample = bps; |
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st->codec->block_align = bps * st->codec->channels / 8; |
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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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AVInputFormat ff_pvf_demuxer = { |
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.name = "pvf", |
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.long_name = NULL_IF_CONFIG_SMALL("PVF (Portable Voice Format)"), |
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.read_probe = pvf_probe, |
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.read_header = pvf_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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.extensions = "pvf", |
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.flags = AVFMT_GENERIC_INDEX, |
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};
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