FFmpeg
daudenc.c
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1 /*
2  * D-Cinema audio muxer
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 "avformat.h"
23 
24 static int daud_write_header(struct AVFormatContext *s)
25 {
26  AVCodecParameters *par = s->streams[0]->codecpar;
27  if (par->channels!=6 || par->sample_rate!=96000)
28  return -1;
29  return 0;
30 }
31 
33 {
34  if (pkt->size > 65535) {
36  "Packet size too large for s302m. (%d > 65535)\n", pkt->size);
37  return -1;
38  }
39  avio_wb16(s->pb, pkt->size);
40  avio_wb16(s->pb, 0x8010); // unknown
41  avio_write(s->pb, pkt->data, pkt->size);
42  return 0;
43 }
44 
46  .name = "daud",
47  .long_name = NULL_IF_CONFIG_SMALL("D-Cinema audio"),
48  .extensions = "302",
49  .audio_codec = AV_CODEC_ID_PCM_S24DAUD,
50  .video_codec = AV_CODEC_ID_NONE,
51  .write_header = daud_write_header,
52  .write_packet = daud_write_packet,
53  .flags = AVFMT_NOTIMESTAMPS,
54 };
AVOutputFormat ff_daud_muxer
Definition: daudenc.c:45
int size
Definition: avcodec.h:1478
static AVPacket pkt
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3945
Format I/O context.
Definition: avformat.h:1358
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1426
uint8_t * data
Definition: avcodec.h:1477
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:218
#define av_log(a,...)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
static int daud_write_packet(struct AVFormatContext *s, AVPacket *pkt)
Definition: daudenc.c:32
const char * name
Definition: avformat.h:505
#define s(width, name)
Definition: cbs_vp9.c:257
#define AVFMT_NOTIMESTAMPS
Format does not need / have any timestamps.
Definition: avformat.h:467
AVIOContext * pb
I/O context.
Definition: avformat.h:1400
void avio_wb16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:475
static int daud_write_header(struct AVFormatContext *s)
Definition: daudenc.c:24
int sample_rate
Audio only.
Definition: avcodec.h:4063
Main libavformat public API header.
int channels
Audio only.
Definition: avcodec.h:4059
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1028
This structure stores compressed data.
Definition: avcodec.h:1454