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libavformat
filmstripenc.c
Go to the documentation of this file.
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/*
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* Adobe Filmstrip muxer
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* Copyright (c) 2010 Peter Ross
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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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/**
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* @file
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* Adobe Filmstrip muxer
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*/
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#include "
libavutil/intreadwrite.h
"
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#include "
avformat.h
"
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#define RAND_TAG MKBETAG('R','a','n','d')
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typedef
struct
{
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int
nb_frames
;
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}
FilmstripMuxContext
;
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static
int
write_header
(
AVFormatContext
*
s
)
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{
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if
(s->
streams
[0]->
codec
->
pix_fmt
!=
AV_PIX_FMT_RGBA
) {
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av_log
(s,
AV_LOG_ERROR
,
"only AV_PIX_FMT_RGBA is supported\n"
);
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return
AVERROR_INVALIDDATA
;
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}
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return
0;
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}
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static
int
write_packet
(
AVFormatContext
*
s
,
AVPacket
*
pkt
)
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{
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FilmstripMuxContext
*film = s->
priv_data
;
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avio_write
(s->
pb
, pkt->
data
, pkt->
size
);
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film->
nb_frames
++;
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return
0;
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}
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static
int
write_trailer
(
AVFormatContext
*
s
)
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{
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FilmstripMuxContext
*film = s->
priv_data
;
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AVIOContext
*pb = s->
pb
;
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AVStream
*st = s->
streams
[0];
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int
i;
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avio_wb32
(pb,
RAND_TAG
);
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avio_wb32
(pb, film->
nb_frames
);
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avio_wb16
(pb, 0);
// packing method
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avio_wb16
(pb, 0);
// reserved
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avio_wb16
(pb, st->
codec
->
width
);
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avio_wb16
(pb, st->
codec
->
height
);
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avio_wb16
(pb, 0);
// leading
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avio_wb16
(pb, st->
codec
->
time_base
.
den
/ st->
codec
->
time_base
.
num
);
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for
(i = 0; i < 16; i++)
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avio_w8
(pb, 0x00);
// reserved
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return
0;
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}
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AVOutputFormat
ff_filmstrip_muxer
= {
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.
name
=
"filmstrip"
,
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.long_name =
NULL_IF_CONFIG_SMALL
(
"Adobe Filmstrip"
),
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.extensions =
"flm"
,
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.priv_data_size =
sizeof
(
FilmstripMuxContext
),
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.audio_codec =
AV_CODEC_ID_NONE
,
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.video_codec =
AV_CODEC_ID_RAWVIDEO
,
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.
write_header
=
write_header
,
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.
write_packet
=
write_packet
,
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.
write_trailer
=
write_trailer
,
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};
Generated on Sun Mar 23 2014 23:50:10 for FFmpeg by
1.8.2