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libavcodec
dump_extradata_bsf.c
Go to the documentation of this file.
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/*
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* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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 <string.h>
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#include "
avcodec.h
"
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#include "
libavutil/mem.h
"
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static
int
dump_extradata
(
AVBitStreamFilterContext
*bsfc,
AVCodecContext
*avctx,
const
char
*args,
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uint8_t
**poutbuf,
int
*poutbuf_size,
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const
uint8_t
*buf,
int
buf_size,
int
keyframe){
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int
cmd= args ? *args : 0;
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/* cast to avoid warning about discarding qualifiers */
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if
(avctx->
extradata
){
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if
( (keyframe && (avctx->
flags2
&
CODEC_FLAG2_LOCAL_HEADER
) && cmd==
'a'
)
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||(keyframe && (cmd==
'k'
|| !cmd))
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||(cmd==
'e'
)
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/*||(? && (s->flags & PARSER_FLAG_DUMP_EXTRADATA_AT_BEGIN)*/
){
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int
size
= buf_size + avctx->
extradata_size
;
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*poutbuf_size=
size
;
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*poutbuf=
av_malloc
(size +
FF_INPUT_BUFFER_PADDING_SIZE
);
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memcpy(*poutbuf, avctx->
extradata
, avctx->
extradata_size
);
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memcpy((*poutbuf) + avctx->
extradata_size
, buf, buf_size +
FF_INPUT_BUFFER_PADDING_SIZE
);
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return
1;
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}
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}
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return
0;
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}
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AVBitStreamFilter
ff_dump_extradata_bsf
={
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"dump_extra"
,
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0,
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dump_extradata
,
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};
av_malloc
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition:
mem.c:62
size
int size
Definition:
twinvq_data.h:11134
mem.h
memory handling functions
uint8_t
uint8_t
Definition:
audio_convert.c:194
AVCodecContext::extradata
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition:
avcodec.h:1164
AVBitStreamFilter
Definition:
avcodec.h:4312
FF_INPUT_BUFFER_PADDING_SIZE
#define FF_INPUT_BUFFER_PADDING_SIZE
Required number of additionally allocated bytes at the end of the input bitstream for decoding...
Definition:
avcodec.h:531
AVBitStreamFilterContext
Definition:
avcodec.h:4304
avcodec.h
Libavcodec external API header.
AVCodecContext
main external API structure.
Definition:
avcodec.h:1050
CODEC_FLAG2_LOCAL_HEADER
#define CODEC_FLAG2_LOCAL_HEADER
Place global headers at every keyframe instead of in extradata.
Definition:
avcodec.h:666
dump_extradata
static int dump_extradata(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args, uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size, int keyframe)
Definition:
dump_extradata_bsf.c:27
AVCodecContext::extradata_size
int extradata_size
Definition:
avcodec.h:1165
ff_dump_extradata_bsf
AVBitStreamFilter ff_dump_extradata_bsf
Definition:
dump_extradata_bsf.c:49
AVCodecContext::flags2
int flags2
CODEC_FLAG2_*.
Definition:
avcodec.h:1151
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