yading@10: /*
yading@10:  * Chomp bitstream filter
yading@10:  * Copyright (c) 2010 Alex Converse <alex.converse@gmail.com>
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: #include "avcodec.h"
yading@10: #include "internal.h"
yading@10: 
yading@10: static int chomp_filter(AVBitStreamFilterContext *bsfc,
yading@10:                         AVCodecContext *avctx, const char *args,
yading@10:                         uint8_t  **poutbuf, int *poutbuf_size,
yading@10:                         const uint8_t *buf, int      buf_size,
yading@10:                         int keyframe)
yading@10: {
yading@10:     while (buf_size > 0 && !buf[buf_size-1])
yading@10:         buf_size--;
yading@10: 
yading@10:     *poutbuf = (uint8_t*) buf;
yading@10:     *poutbuf_size = buf_size;
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: /**
yading@10:  * This filter removes a string of NULL bytes from the end of a packet.
yading@10:  */
yading@10: AVBitStreamFilter ff_chomp_bsf = {
yading@10:     "chomp",
yading@10:     0,
yading@10:     chomp_filter,
yading@10: };