mirror of
https://github.com/FFmpeg/FFmpeg.git
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91 lines
2.8 KiB
C
91 lines
2.8 KiB
C
/*
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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 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 <string.h>
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#include "avcodec.h"
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#include "libavutil/atomic.h"
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#include "libavutil/mem.h"
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static AVBitStreamFilter *first_bitstream_filter = NULL;
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AVBitStreamFilter *av_bitstream_filter_next(const AVBitStreamFilter *f)
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{
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if (f)
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return f->next;
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else
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return first_bitstream_filter;
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}
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void av_register_bitstream_filter(AVBitStreamFilter *bsf)
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{
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do {
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bsf->next = first_bitstream_filter;
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} while(bsf->next != avpriv_atomic_ptr_cas((void * volatile *)&first_bitstream_filter, bsf->next, bsf));
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}
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AVBitStreamFilterContext *av_bitstream_filter_init(const char *name)
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{
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AVBitStreamFilter *bsf = NULL;
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while (bsf = av_bitstream_filter_next(bsf)) {
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if (!strcmp(name, bsf->name)) {
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AVBitStreamFilterContext *bsfc =
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av_mallocz(sizeof(AVBitStreamFilterContext));
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if (!bsfc)
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return NULL;
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bsfc->filter = bsf;
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bsfc->priv_data = NULL;
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if (bsf->priv_data_size) {
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bsfc->priv_data = av_mallocz(bsf->priv_data_size);
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if (!bsfc->priv_data) {
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av_freep(&bsfc);
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return NULL;
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}
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}
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return bsfc;
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}
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}
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return NULL;
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}
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void av_bitstream_filter_close(AVBitStreamFilterContext *bsfc)
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{
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if (!bsfc)
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return;
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if (bsfc->filter->close)
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bsfc->filter->close(bsfc);
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av_freep(&bsfc->priv_data);
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av_freep(&bsfc->args);
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av_parser_close(bsfc->parser);
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av_free(bsfc);
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}
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int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc,
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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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{
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*poutbuf = (uint8_t *)buf;
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*poutbuf_size = buf_size;
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return bsfc->filter->filter(bsfc, avctx, args ? args : bsfc->args,
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poutbuf, poutbuf_size, buf, buf_size, keyframe);
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}
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