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libavformat
ivfenc.c
Go to the documentation of this file.
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/*
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* Copyright (c) 2010 Reimar Döffinger
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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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#include "
libavutil/intreadwrite.h
"
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static
int
ivf_write_header
(
AVFormatContext
*
s
)
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{
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AVCodecContext
*ctx;
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AVIOContext
*pb = s->
pb
;
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if
(s->
nb_streams
!= 1) {
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av_log
(s,
AV_LOG_ERROR
,
"Format supports only exactly one video stream\n"
);
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return
AVERROR
(EINVAL);
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}
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ctx = s->
streams
[0]->
codec
;
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if
(ctx->
codec_type
!=
AVMEDIA_TYPE_VIDEO
|| ctx->
codec_id
!=
AV_CODEC_ID_VP8
) {
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av_log
(s,
AV_LOG_ERROR
,
"Currently only VP8 is supported!\n"
);
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return
AVERROR
(EINVAL);
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}
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avio_write
(pb,
"DKIF"
, 4);
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avio_wl16
(pb, 0);
// version
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avio_wl16
(pb, 32);
// header length
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avio_wl32
(pb, ctx->
codec_tag
? ctx->
codec_tag
:
AV_RL32
(
"VP80"
));
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avio_wl16
(pb, ctx->
width
);
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avio_wl16
(pb, ctx->
height
);
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avio_wl32
(pb, s->
streams
[0]->
time_base
.
den
);
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avio_wl32
(pb, s->
streams
[0]->
time_base
.
num
);
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avio_wl64
(pb, s->
streams
[0]->
duration
);
// TODO: duration or number of frames?!?
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return
0;
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}
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static
int
ivf_write_packet
(
AVFormatContext
*
s
,
AVPacket
*
pkt
)
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{
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AVIOContext
*pb = s->
pb
;
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avio_wl32
(pb, pkt->
size
);
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avio_wl64
(pb, pkt->
pts
);
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avio_write
(pb, pkt->
data
, pkt->
size
);
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return
0;
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}
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AVOutputFormat
ff_ivf_muxer
= {
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.
name
=
"ivf"
,
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.long_name =
NULL_IF_CONFIG_SMALL
(
"On2 IVF"
),
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.extensions =
"ivf"
,
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.audio_codec =
AV_CODEC_ID_NONE
,
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.video_codec =
AV_CODEC_ID_VP8
,
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.write_header =
ivf_write_header
,
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.write_packet =
ivf_write_packet
,
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};
Generated on Wed Jul 10 2013 23:48:12 for FFmpeg by
1.8.2