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_coded_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 static int daud_write_header(struct AVFormatContext *s)
  51 {
  52     AVCodecContext *codec = s->streams[0]->codec;
  53     if (codec->channels!=6 || codec->sample_rate!=96000)
  54         return -1;
  55     return 0;
  56 }
  57
  58 static int daud_write_packet(struct AVFormatContext *s, AVPacket *pkt)
  59 {
  60     put_be16(s->pb, pkt->size);
  61     put_be16(s->pb, 0x8010); // unknown
  62     put_buffer(s->pb, pkt->data, pkt->size);
  63     put_flush_packet(s->pb);
  64     return 0;
  65 }
  66
  67 #if CONFIG_DAUD_DEMUXER
  68 AVInputFormat daud_demuxer = {
  69     "daud",
  70     NULL_IF_CONFIG_SMALL("D-Cinema audio format"),
  71     0,
  72     NULL,
  73     daud_header,
  74     daud_packet,
  75     NULL,
  76     NULL,
  77     .extensions = "302",
  78 };
  79 #endif
  80
  81 #if CONFIG_DAUD_MUXER
  82 AVOutputFormat daud_muxer =
  83 {
  84     "daud",
  85     NULL_IF_CONFIG_SMALL("D-Cinema audio format"),
  86     NULL,
  87     "302",
  88     0,
  89     CODEC_ID_PCM_S24DAUD,
  90     CODEC_ID_NONE,
  91     daud_write_header,
  92     daud_write_packet,
  93     .flags= AVFMT_NOTIMESTAMPS,
  94 };
  95 #endif