FFmpeg: libavformat/ircamenc.c Source File

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ircamenc.c
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1/*
2 * IRCAM muxer
3 * Copyright (c) 2012 Paul B Mahol
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/intreadwrite.h"
23#include "avformat.h"
24#include "avio_internal.h"
25#include "internal.h"
26#include "mux.h"
27#include "rawenc.h"
28#include "ircam.h"
29
31{
32 AVCodecParameters *par = s->streams[0]->codecpar;
33 uint32_t tag;
34
36 if (!tag) {
37 av_log(s, AV_LOG_ERROR, "unsupported codec\n");
38 return AVERROR(EINVAL);
39 }
40
41 avio_wl32(s->pb, 0x0001A364);
44 avio_wl32(s->pb, tag);
45 ffio_fill(s->pb, 0, 1008);
46 return 0;
47}
48
50 .p.name = "ircam",
51 .p.extensions = "sf,ircam",
52 .p.long_name = NULL_IF_CONFIG_SMALL("Berkeley/IRCAM/CARL Sound Format"),
53 .p.audio_codec = AV_CODEC_ID_PCM_S16LE,
54 .p.video_codec = AV_CODEC_ID_NONE,
55 .p.subtitle_codec = AV_CODEC_ID_NONE,
56 .flags_internal = FF_OFMT_FLAG_MAX_ONE_OF_EACH,
57 .write_header = ircam_write_header,
58 .write_packet = ff_raw_write_packet,
59 .p.codec_tag = (const AVCodecTag *const []){ ff_codec_ircam_le_tags, 0 },
60};
const FFOutputFormat ff_ircam_muxer
Definition ircamenc.c:49
Main libavformat public API header.
void avio_wl32(AVIOContext *s, unsigned int val)
Definition aviobuf.c:360
void ffio_fill(AVIOContext *s, int b, int64_t count)
Definition aviobuf.c:192
s
#define s(width, name)
Definition cbs_vp9.c:198
@ AV_CODEC_ID_PCM_S16LE
Definition codec_id.h:330
@ AV_CODEC_ID_NONE
Definition codec_id.h:48
#define AVERROR(e)
Definition error.h:45
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition log.h:210
uint32_t av_q2intfloat(AVRational q)
Convert an AVRational to a IEEE 32-bit float expressed in fixed-point format.
Definition rational.c:154
const AVCodecTag ff_codec_ircam_le_tags[]
Definition ircam.c:25
static int ircam_write_header(AVFormatContext *s)
Definition ircamenc.c:30
unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
Definition utils.c:133
int ff_raw_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition rawenc.c:31
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition internal.h:88
uint32_t tag
Definition movenc.c:2087
#define FF_OFMT_FLAG_MAX_ONE_OF_EACH
If this flag is set, it indicates that for each codec type whose corresponding default codec (i....
Definition mux.h:50
int nb_channels
Number of channels in this layout.
This struct describes the properties of an encoded stream.
Definition codec_par.h:49
AVChannelLayout ch_layout
The channel layout and number of channels.
Definition codec_par.h:207
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition codec_par.h:57
int sample_rate
The number of audio samples per second.
Definition codec_par.h:213
Format I/O context.
Definition avformat.h:1333
Rational number (pair of numerator and denominator).
Definition rational.h:58
#define av_log(a,...)
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