libavformat/dauddec.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
  22 #include "libavutil/channel_layout.h"
  23 #include "avformat.h"
  24 #include "demux.h"
  25 #include "internal.h"
  26
  27 static int daud_header(AVFormatContext *s) {
  28     AVStream *st = avformat_new_stream(s, NULL);
  29     if (!st)
  30         return AVERROR(ENOMEM);
  31     st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
  32     st->codecpar->codec_id = AV_CODEC_ID_PCM_S24DAUD;
  33     st->codecpar->codec_tag = MKTAG('d', 'a', 'u', 'd');
  34     st->codecpar->ch_layout = (AVChannelLayout)AV_CHANNEL_LAYOUT_5POINT1;
  35     st->codecpar->sample_rate = 96000;
  36     st->codecpar->bit_rate = 3 * 6 * 96000 * 8;
  37     st->codecpar->block_align = 3 * 6;
  38     st->codecpar->bits_per_coded_sample = 24;
  39
  40     avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
  41
  42     return 0;
  43 }
  44
  45 static int daud_packet(AVFormatContext *s, AVPacket *pkt) {
  46     AVIOContext *pb = s->pb;
  47     int ret, size;
  48     if (avio_feof(pb))
  49         return AVERROR_EOF;
  50     size = avio_rb16(pb);
  51     avio_rb16(pb); // unknown
  52     ret = av_get_packet(pb, pkt, size);
  53     pkt->stream_index = 0;
  54     return ret;
  55 }
  56
  57 const FFInputFormat ff_daud_demuxer = {
  58     .p.name         = "daud",
  59     .p.long_name    = NULL_IF_CONFIG_SMALL("D-Cinema audio"),
  60     .p.extensions   = "302,daud",
  61     .read_header    = daud_header,
  62     .read_packet    = daud_packet,
  63 };