From 880191637ff7223541cd2e4db748c6e07fee596c Mon Sep 17 00:00:00 2001 From: Paul B Mahol Date: Sun, 2 Dec 2012 18:13:56 +0000 Subject: IRCAM demuxer & muxer Signed-off-by: Paul B Mahol --- libavformat/ircamenc.c | 61 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 libavformat/ircamenc.c (limited to 'libavformat/ircamenc.c') diff --git a/libavformat/ircamenc.c b/libavformat/ircamenc.c new file mode 100644 index 0000000000..d33a062387 --- /dev/null +++ b/libavformat/ircamenc.c @@ -0,0 +1,61 @@ +/* + * IRCAM muxer + * Copyright (c) 2012 Paul B Mahol + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "libavutil/intreadwrite.h" +#include "avformat.h" +#include "internal.h" +#include "rawenc.h" +#include "ircam.h" + +static int ircam_write_header(AVFormatContext *s) +{ + AVCodecContext *codec = s->streams[0]->codec; + uint32_t tag; + + if (s->nb_streams != 1) { + av_log(s, AV_LOG_ERROR, "only one stream is supported\n"); + return AVERROR(EINVAL); + } + + tag = ff_codec_get_tag(ff_codec_ircam_le_tags, codec->codec_id); + if (!tag) { + av_log(s, AV_LOG_ERROR, "unsupported codec\n"); + return AVERROR(EINVAL); + } + + avio_wl32(s->pb, 0x0001A364); + avio_wl32(s->pb, av_float2int(codec->sample_rate)); + avio_wl32(s->pb, codec->channels); + avio_wl32(s->pb, tag); + avio_skip(s->pb, 1008); + return 0; +} + +AVOutputFormat ff_ircam_muxer = { + .name = "ircam", + .extensions = "sf,ircam", + .long_name = NULL_IF_CONFIG_SMALL("Berkeley/IRCAM/CARL Sound Format"), + .audio_codec = AV_CODEC_ID_PCM_S16LE, + .video_codec = AV_CODEC_ID_NONE, + .write_header = ircam_write_header, + .write_packet = ff_raw_write_packet, + .codec_tag = (const AVCodecTag *const []){ ff_codec_ircam_le_tags, 0 }, +}; -- cgit v1.2.3