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https://github.com/FFmpeg/FFmpeg.git
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63 lines
2.0 KiB
C
63 lines
2.0 KiB
C
/*
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* IRCAM muxer
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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 "libavutil/intreadwrite.h"
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#include "avformat.h"
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#include "avio_internal.h"
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#include "internal.h"
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#include "rawenc.h"
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#include "ircam.h"
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static int ircam_write_header(AVFormatContext *s)
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{
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AVCodecContext *codec = s->streams[0]->codec;
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uint32_t tag;
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if (s->nb_streams != 1) {
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av_log(s, AV_LOG_ERROR, "only one stream is supported\n");
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return AVERROR(EINVAL);
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}
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tag = ff_codec_get_tag(ff_codec_ircam_le_tags, codec->codec_id);
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if (!tag) {
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av_log(s, AV_LOG_ERROR, "unsupported codec\n");
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return AVERROR(EINVAL);
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}
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avio_wl32(s->pb, 0x0001A364);
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avio_wl32(s->pb, av_q2intfloat((AVRational){codec->sample_rate, 1}));
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avio_wl32(s->pb, codec->channels);
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avio_wl32(s->pb, tag);
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ffio_fill(s->pb, 0, 1008);
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return 0;
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}
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AVOutputFormat ff_ircam_muxer = {
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.name = "ircam",
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.extensions = "sf,ircam",
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.long_name = NULL_IF_CONFIG_SMALL("Berkeley/IRCAM/CARL Sound Format"),
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.audio_codec = AV_CODEC_ID_PCM_S16LE,
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.video_codec = AV_CODEC_ID_NONE,
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.write_header = ircam_write_header,
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.write_packet = ff_raw_write_packet,
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.codec_tag = (const AVCodecTag *const []){ ff_codec_ircam_le_tags, 0 },
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};
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