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  1. /*
  2.  * D-Cinema audio muxer
  3.  * Copyright (c) 2005 Reimar Döffinger
  4.  *
  5.  * This file is part of FFmpeg.
  6.  *
  7.  * FFmpeg is free software; you can redistribute it and/or
  8.  * modify it under the terms of the GNU Lesser General Public
  9.  * License as published by the Free Software Foundation; either
  10.  * version 2.1 of the License, or (at your option) any later version.
  11.  *
  12.  * FFmpeg is distributed in the hope that it will be useful,
  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15.  * Lesser General Public License for more details.
  16.  *
  17.  * You should have received a copy of the GNU Lesser General Public
  18.  * License along with FFmpeg; if not, write to the Free Software
  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20.  */
  21.  
  22. #include "avformat.h"
  23.  
  24. static int daud_write_header(struct AVFormatContext *s)
  25. {
  26.     AVCodecContext *codec = s->streams[0]->codec;
  27.     if (codec->channels!=6 || codec->sample_rate!=96000)
  28.         return -1;
  29.     return 0;
  30. }
  31.  
  32. static int daud_write_packet(struct AVFormatContext *s, AVPacket *pkt)
  33. {
  34.     if (pkt->size > 65535) {
  35.         av_log(s, AV_LOG_ERROR,
  36.                "Packet size too large for s302m. (%d > 65535)\n", pkt->size);
  37.         return -1;
  38.     }
  39.     avio_wb16(s->pb, pkt->size);
  40.     avio_wb16(s->pb, 0x8010); // unknown
  41.     avio_write(s->pb, pkt->data, pkt->size);
  42.     return 0;
  43. }
  44.  
  45. AVOutputFormat ff_daud_muxer = {
  46.     .name         = "daud",
  47.     .long_name    = NULL_IF_CONFIG_SMALL("D-Cinema audio"),
  48.     .extensions   = "302",
  49.     .audio_codec  = AV_CODEC_ID_PCM_S24DAUD,
  50.     .video_codec  = AV_CODEC_ID_NONE,
  51.     .write_header = daud_write_header,
  52.     .write_packet = daud_write_packet,
  53.     .flags        = AVFMT_NOTIMESTAMPS,
  54. };
  55.