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libavformat
framecrcenc.c
Go to the documentation of this file.
1
/*
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* frame 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 <inttypes.h>
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#include "
libavutil/adler32.h
"
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#include "
libavutil/avstring.h
"
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#include "
avformat.h
"
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#include "
internal.h
"
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static
int
framecrc_write_header
(
struct
AVFormatContext
*
s
)
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{
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int
i;
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for
(i = 0; i < s->
nb_streams
; i++) {
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AVStream
*st = s->
streams
[i];
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AVCodecContext
*avctx = st->
codec
;
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if
(avctx->
extradata
) {
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uint32_t crc =
av_adler32_update
(0, avctx->
extradata
, avctx->
extradata_size
);
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avio_printf
(s->
pb
,
"#extradata %d: %8d, 0x%08"
PRIx32
"\n"
,
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i, avctx->
extradata_size
, crc);
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}
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}
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return
ff_framehash_write_header
(s);
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}
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static
int
framecrc_write_packet
(
struct
AVFormatContext
*
s
,
AVPacket
*
pkt
)
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{
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uint32_t crc =
av_adler32_update
(0, pkt->
data
, pkt->
size
);
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char
buf
[256];
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snprintf
(buf,
sizeof
(buf),
"%d, %10"
PRId64
", %10"
PRId64
", %8d, %8d, 0x%08"
PRIx32,
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pkt->
stream_index
, pkt->
dts
, pkt->
pts
, pkt->
duration
, pkt->
size
, crc);
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if
(pkt->
flags
!=
AV_PKT_FLAG_KEY
)
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av_strlcatf
(buf,
sizeof
(buf),
", F=0x%0X"
, pkt->
flags
);
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if
(pkt->
side_data_elems
) {
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int
i, j;
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av_strlcatf
(buf,
sizeof
(buf),
", S=%d"
, pkt->
side_data_elems
);
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for
(i=0; i<pkt->
side_data_elems
; i++) {
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uint32_t side_data_crc = 0;
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if
(HAVE_BIGENDIAN &&
AV_PKT_DATA_PALETTE
== pkt->
side_data
[i].
type
) {
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for
(j=0; j<pkt->
side_data
[i].
size
; j++) {
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side_data_crc =
av_adler32_update
(side_data_crc,
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pkt->
side_data
[i].
data
+ (j^3),
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1);
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}
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}
else
{
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side_data_crc =
av_adler32_update
(0,
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pkt->
side_data
[i].
data
,
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pkt->
side_data
[i].
size
);
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}
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av_strlcatf
(buf,
sizeof
(buf),
", %8d, 0x%08x"
, pkt->
side_data
[i].
size
, side_data_crc);
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}
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}
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av_strlcatf
(buf,
sizeof
(buf),
"\n"
);
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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_framecrc_muxer
= {
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.
name
=
"framecrc"
,
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.long_name =
NULL_IF_CONFIG_SMALL
(
"framecrc testing"
),
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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 =
framecrc_write_header
,
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.write_packet =
framecrc_write_packet
,
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.flags =
AVFMT_VARIABLE_FPS
|
AVFMT_TS_NONSTRICT
|
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AVFMT_TS_NEGATIVE
,
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};
Generated on Sun Mar 8 2015 02:35:09 for FFmpeg by
1.8.2