1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/*
* Copyright (c) 2010 Reimar Döffinger
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avformat.h"
#include "libavutil/intreadwrite.h"
static int ivf_write_header(AVFormatContext *s)
{
AVCodecContext *ctx;
ByteIOContext *pb = s->pb;
if (s->nb_streams != 1) {
av_log(s, AV_LOG_ERROR, "Format supports only exactly one video stream\n");
return AVERROR(EINVAL);
}
ctx = s->streams[0]->codec;
if (ctx->codec_type != CODEC_TYPE_VIDEO || ctx->codec_id != CODEC_ID_VP8) {
av_log(s, AV_LOG_ERROR, "Currently only VP8 is supported!\n");
return AVERROR(EINVAL);
}
put_buffer(pb, "DKIF", 4);
put_le16(pb, 0); // version
put_le16(pb, 32); // header length
put_le32(pb, ctx->codec_tag ? ctx->codec_tag : AV_RL32("VP80"));
put_le16(pb, ctx->width);
put_le16(pb, ctx->height);
put_le32(pb, s->streams[0]->time_base.den);
put_le32(pb, s->streams[0]->time_base.num);
put_le64(pb, s->streams[0]->duration); // TODO: duration or number of frames?!?
return 0;
}
static int ivf_write_packet(AVFormatContext *s, AVPacket *pkt)
{
ByteIOContext *pb = s->pb;
put_le32(pb, pkt->size);
put_le64(pb, pkt->pts);
put_buffer(pb, pkt->data, pkt->size);
put_flush_packet(pb);
return 0;
}
AVOutputFormat ivf_muxer = {
.name = "ivf",
.long_name = NULL_IF_CONFIG_SMALL("On2 IVF"),
.extensions = "ivf",
.audio_codec = CODEC_ID_NONE,
.video_codec = CODEC_ID_VP8,
.write_header = ivf_write_header,
.write_packet = ivf_write_packet,
};
|
