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libavformat
crcenc.c
Go to the documentation of this file.
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/*
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* CRC encoder (for codec/format testing)
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* Copyright (c) 2002 Fabrice Bellard
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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 "
libavutil/adler32.h
"
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#include "
avformat.h
"
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typedef
struct
CRCState
{
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uint32_t
crcval
;
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}
CRCState
;
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static
int
crc_write_header
(
struct
AVFormatContext
*
s
)
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{
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CRCState
*crc = s->
priv_data
;
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/* init CRC */
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crc->
crcval
= 1;
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return
0;
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}
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static
int
crc_write_packet
(
struct
AVFormatContext
*
s
,
AVPacket
*
pkt
)
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{
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CRCState
*crc = s->
priv_data
;
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crc->
crcval
=
av_adler32_update
(crc->
crcval
, pkt->
data
, pkt->
size
);
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return
0;
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}
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static
int
crc_write_trailer
(
struct
AVFormatContext
*
s
)
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{
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CRCState
*crc = s->
priv_data
;
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char
buf
[64];
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snprintf
(buf,
sizeof
(buf),
"CRC=0x%08x\n"
, crc->
crcval
);
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avio_write
(s->
pb
, buf, strlen(buf));
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return
0;
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}
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AVOutputFormat
ff_crc_muxer
= {
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.
name
=
"crc"
,
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.long_name =
NULL_IF_CONFIG_SMALL
(
"CRC testing"
),
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.priv_data_size =
sizeof
(
CRCState
),
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.audio_codec =
AV_CODEC_ID_PCM_S16LE
,
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.video_codec =
AV_CODEC_ID_RAWVIDEO
,
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.
write_header
=
crc_write_header
,
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.
write_packet
=
crc_write_packet
,
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.
write_trailer
=
crc_write_trailer
,
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.
flags
=
AVFMT_NOTIMESTAMPS
,
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};
Generated on Wed Jul 10 2013 23:48:11 for FFmpeg by
1.8.2