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/*
* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <string.h>
#include "avcodec.h"
#include "libavutil/atomic.h"
#include "libavutil/mem.h"
static AVBitStreamFilter *first_bitstream_filter = NULL;
AVBitStreamFilter *av_bitstream_filter_next(AVBitStreamFilter *f)
{
if (f)
return f->next;
else
return first_bitstream_filter;
}
void av_register_bitstream_filter(AVBitStreamFilter *bsf)
{
do {
bsf->next = first_bitstream_filter;
} while(bsf->next != avpriv_atomic_ptr_cas((void * volatile *)&first_bitstream_filter, bsf->next, bsf));
}
AVBitStreamFilterContext *av_bitstream_filter_init(const char *name)
{
AVBitStreamFilter *bsf = first_bitstream_filter;
while (bsf) {
if (!strcmp(name, bsf->name)) {
AVBitStreamFilterContext *bsfc =
av_mallocz(sizeof(AVBitStreamFilterContext));
bsfc->filter = bsf;
bsfc->priv_data =
bsf->priv_data_size ? av_mallocz(bsf->priv_data_size) : NULL;
return bsfc;
}
bsf = bsf->next;
}
return NULL;
}
void av_bitstream_filter_close(AVBitStreamFilterContext *bsfc)
{
if (!bsfc)
return;
if (bsfc->filter->close)
bsfc->filter->close(bsfc);
av_freep(&bsfc->priv_data);
av_parser_close(bsfc->parser);
av_free(bsfc);
}
int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
AVCodecContext *avctx, const char *args,
uint8_t **poutbuf, int *poutbuf_size,
const uint8_t *buf, int buf_size, int keyframe)
{
*poutbuf = (uint8_t *)buf;
*poutbuf_size = buf_size;
return bsfc->filter->filter(bsfc, avctx, args, poutbuf, poutbuf_size,
buf, buf_size, keyframe);
}
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