libavformat/daud.c

   1 /*
   2  * D-Cinema audio demuxer
   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 #include "avformat.h"
  22
  23 static int daud_header(AVFormatContext *s, AVFormatParameters *ap) {
  24     AVStream *st = av_new_stream(s, 0);
  25     st->codec->codec_type = CODEC_TYPE_AUDIO;
  26     st->codec->codec_id = CODEC_ID_PCM_S24DAUD;
  27     st->codec->codec_tag = MKTAG('d', 'a', 'u', 'd');
  28     st->codec->channels = 6;
  29     st->codec->sample_rate = 96000;
  30     st->codec->bit_rate = 3 * 6 * 96000 * 8;
  31     st->codec->block_align = 3 * 6;
  32     st->codec->bits_per_sample = 24;
  33     return 0;
  34 }
  35
  36 static int daud_packet(AVFormatContext *s, AVPacket *pkt) {
  37     ByteIOContext *pb = s->pb;
  38     int ret, size;
  39     if (url_feof(pb))
  40         return AVERROR(EIO);
  41     size = get_be16(pb);
  42     get_be16(pb); // unknown
  43     ret = av_get_packet(pb, pkt, size);
  44     pkt->stream_index = 0;
  45     return ret;
  46 }
  47
  48 AVInputFormat daud_demuxer = {
  49     "daud",
  50     "D-Cinema audio format",
  51     0,
  52     NULL,
  53     daud_header,
  54     daud_packet,
  55     NULL,
  56     NULL,
  57     .extensions = "302",
  58 };