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libavcodec/chomp_bsf.c

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00001 /*
00002  * Chomp bitstream filter
00003  * Copyright (c) 2010 Alex Converse <alex.converse@gmail.com>
00004  *
00005  * This file is part of FFmpeg.
00006  *
00007  * FFmpeg is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * FFmpeg is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with FFmpeg; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00020  */
00021 
00022 #include "avcodec.h"
00023 #include "internal.h"
00024 
00025 static int chomp_filter(AVBitStreamFilterContext *bsfc,
00026                         AVCodecContext *avctx, const char *args,
00027                         uint8_t  **poutbuf, int *poutbuf_size,
00028                         const uint8_t *buf, int      buf_size,
00029                         int keyframe)
00030 {
00031     while (buf_size > 0 && !buf[buf_size-1])
00032         buf_size--;
00033 
00034     *poutbuf = (uint8_t*) buf;
00035     *poutbuf_size = buf_size;
00036 
00037     return 0;
00038 }
00039 
00043 AVBitStreamFilter ff_chomp_bsf = {
00044     "chomp",
00045     0,
00046     chomp_filter,
00047 };

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