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     if (!st)
  26         return AVERROR(ENOMEM);
  27     st->codec->codec_type = CODEC_TYPE_AUDIO;
  28     st->codec->codec_id = CODEC_ID_PCM_S24DAUD;
  29     st->codec->codec_tag = MKTAG('d', 'a', 'u', 'd');
  30     st->codec->channels = 6;
  31     st->codec->sample_rate = 96000;
  32     st->codec->bit_rate = 3 * 6 * 96000 * 8;
  33     st->codec->block_align = 3 * 6;
  34     st->codec->bits_per_sample = 24;
  35     return 0;
  36 }
  37
  38 static int daud_packet(AVFormatContext *s, AVPacket *pkt) {
  39     ByteIOContext *pb = s->pb;
  40     int ret, size;
  41     if (url_feof(pb))
  42         return AVERROR(EIO);
  43     size = get_be16(pb);
  44     get_be16(pb); // unknown
  45     ret = av_get_packet(pb, pkt, size);
  46     pkt->stream_index = 0;
  47     return ret;
  48 }
  49
  50 AVInputFormat daud_demuxer = {
  51     "daud",
  52     NULL_IF_CONFIG_SMALL("D-Cinema audio format"),
  53     0,
  54     NULL,
  55     daud_header,
  56     daud_packet,
  57     NULL,
  58     NULL,
  59     .extensions = "302",
  60 };