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libavformat
idroqenc.c
Go to the documentation of this file.
1
/*
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* id RoQ (.roq) File muxer
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* Copyright (c) 2007 Vitor Sessak
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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 "
rawenc.h
"
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static
int
roq_write_header
(
struct
AVFormatContext
*
s
)
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{
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uint8_t
header
[] = {
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0x84, 0x10, 0xFF, 0xFF, 0xFF, 0xFF,
/* fps: */
0x1E, 0x00
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};
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int
n
;
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AVCodecContext
*avctx;
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// set the actual fps
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for
(n=0;n<s->
nb_streams
;n++) {
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if
((avctx=s->
streams
[n]->
codec
)->codec_type ==
AVMEDIA_TYPE_VIDEO
) {
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unsigned
int
fps;
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if
(avctx->
time_base
.
num
!= 1) {
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av_log
(avctx,
AV_LOG_ERROR
,
"Frame rate must be integer\n"
);
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return
AVERROR
(EINVAL);
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}
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if
((fps=avctx->
time_base
.
den
) > 255) {
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av_log
(avctx,
AV_LOG_ERROR
,
"Frame rate may not exceed 255fps\n"
);
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return
AVERROR
(EINVAL);
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}
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if
(fps != 30) {
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av_log
(avctx,
AV_LOG_WARNING
,
"For vintage compatibility fps must be 30\n"
);
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}
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header[6] = fps;
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break
;
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}
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}
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avio_write
(s->
pb
, header, 8);
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avio_flush
(s->
pb
);
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return
0;
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}
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AVOutputFormat
ff_roq_muxer
= {
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.
name
=
"roq"
,
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.long_name =
NULL_IF_CONFIG_SMALL
(
"raw id RoQ"
),
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.extensions =
"roq"
,
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.audio_codec =
AV_CODEC_ID_ROQ_DPCM
,
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.video_codec =
AV_CODEC_ID_ROQ
,
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.write_header =
roq_write_header
,
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.write_packet =
ff_raw_write_packet
,
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};
s
const char * s
Definition:
avisynth_c.h:631
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition:
log.h:182
AVRational::num
int num
numerator
Definition:
rational.h:44
AV_CODEC_ID_ROQ_DPCM
Definition:
avcodec.h:411
AVCodecContext::time_base
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition:
avcodec.h:1661
AVFormatContext
Format I/O context.
Definition:
avformat.h:1314
uint8_t
uint8_t
Definition:
audio_convert.c:194
AVFormatContext::streams
AVStream ** streams
A list of all streams in the file.
Definition:
avformat.h:1382
header
static const uint8_t header[24]
Definition:
sdr2.c:67
avio_write
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition:
aviobuf.c:182
av_log
#define av_log(a,...)
Definition:
tableprint_vlc.h:28
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition:
log.h:176
AVERROR
#define AVERROR(e)
Definition:
error.h:43
rawenc.h
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition:
internal.h:176
AVStream::codec
AVCodecContext * codec
Codec context associated with this stream.
Definition:
avformat.h:896
AVFormatContext::nb_streams
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition:
avformat.h:1370
AV_CODEC_ID_ROQ
Definition:
avcodec.h:145
ff_roq_muxer
AVOutputFormat ff_roq_muxer
Definition:
idroqenc.c:64
avio_flush
int void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition:
aviobuf.c:202
AVOutputFormat::name
const char * name
Definition:
avformat.h:523
ff_raw_write_packet
int ff_raw_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition:
rawenc.c:26
n
int n
Definition:
avisynth_c.h:547
AVFormatContext::pb
AVIOContext * pb
I/O context.
Definition:
avformat.h:1356
AVCodecContext
main external API structure.
Definition:
avcodec.h:1532
avformat.h
Main libavformat public API header.
AVOutputFormat
Definition:
avformat.h:522
AVRational::den
int den
denominator
Definition:
rational.h:45
AVMEDIA_TYPE_VIDEO
Definition:
avutil.h:193
roq_write_header
static int roq_write_header(struct AVFormatContext *s)
Definition:
idroqenc.c:26
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