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95 lines
2.5 KiB
95 lines
2.5 KiB
/* |
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* D-Cinema audio demuxer |
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* Copyright (c) 2005 Reimar Döffinger |
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* |
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* This file is part of Libav. |
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* |
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* Libav is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* Libav is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with Libav; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#include "avformat.h" |
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static int daud_header(AVFormatContext *s, AVFormatParameters *ap) { |
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AVStream *st = av_new_stream(s, 0); |
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if (!st) |
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return AVERROR(ENOMEM); |
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st->codec->codec_type = AVMEDIA_TYPE_AUDIO; |
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st->codec->codec_id = CODEC_ID_PCM_S24DAUD; |
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st->codec->codec_tag = MKTAG('d', 'a', 'u', 'd'); |
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st->codec->channels = 6; |
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st->codec->sample_rate = 96000; |
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st->codec->bit_rate = 3 * 6 * 96000 * 8; |
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st->codec->block_align = 3 * 6; |
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st->codec->bits_per_coded_sample = 24; |
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return 0; |
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} |
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static int daud_packet(AVFormatContext *s, AVPacket *pkt) { |
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AVIOContext *pb = s->pb; |
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int ret, size; |
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if (pb->eof_reached) |
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return AVERROR(EIO); |
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size = avio_rb16(pb); |
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avio_rb16(pb); // unknown |
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ret = av_get_packet(pb, pkt, size); |
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pkt->stream_index = 0; |
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return ret; |
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} |
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static int daud_write_header(struct AVFormatContext *s) |
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{ |
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AVCodecContext *codec = s->streams[0]->codec; |
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if (codec->channels!=6 || codec->sample_rate!=96000) |
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return -1; |
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return 0; |
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} |
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static int daud_write_packet(struct AVFormatContext *s, AVPacket *pkt) |
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{ |
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avio_wb16(s->pb, pkt->size); |
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avio_wb16(s->pb, 0x8010); // unknown |
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avio_write(s->pb, pkt->data, pkt->size); |
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avio_flush(s->pb); |
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return 0; |
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} |
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#if CONFIG_DAUD_DEMUXER |
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AVInputFormat ff_daud_demuxer = { |
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"daud", |
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NULL_IF_CONFIG_SMALL("D-Cinema audio format"), |
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0, |
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NULL, |
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daud_header, |
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daud_packet, |
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NULL, |
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NULL, |
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.extensions = "302", |
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}; |
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#endif |
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#if CONFIG_DAUD_MUXER |
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AVOutputFormat ff_daud_muxer = |
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{ |
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"daud", |
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NULL_IF_CONFIG_SMALL("D-Cinema audio format"), |
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NULL, |
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"302", |
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0, |
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CODEC_ID_PCM_S24DAUD, |
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CODEC_ID_NONE, |
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daud_write_header, |
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daud_write_packet, |
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.flags= AVFMT_NOTIMESTAMPS, |
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}; |
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#endif
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