Revision cd7105e6

View differences:

libavcodec/Makefile
306 306

  
307 307
OBJS-$(CONFIG_DUMP_EXTRADATA_BSF)      += bitstream_filter.o
308 308
OBJS-$(CONFIG_REMOVE_EXTRADATA_BSF)    += bitstream_filter.o
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OBJS-$(CONFIG_NOISE_BSF)               += bitstream_filter.o
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OBJS-$(CONFIG_NOISE_BSF)               += noise_bsf.o
310 310
OBJS-$(CONFIG_MP3_HEADER_COMPRESS_BSF) += mp3_header_compress_bsf.o
311 311
OBJS-$(CONFIG_MP3_HEADER_DECOMPRESS_BSF) += mp3_header_decompress_bsf.o mpegaudiodata.o
312 312
OBJS-$(CONFIG_MJPEGA_DUMP_HEADER_BSF)  += mjpegdec.o mjpeg.o jpeglsdec.o jpegls.o
libavcodec/bitstream_filter.c
106 106
    return 0;
107 107
}
108 108

  
109
static int noise(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 amount= args ? atoi(args) : 10000;
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    unsigned int *state= bsfc->priv_data;
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    int i;
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    *poutbuf= av_malloc(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
117

  
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    memcpy(*poutbuf, buf, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
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    for(i=0; i<buf_size; i++){
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        (*state) += (*poutbuf)[i] + 1;
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        if(*state % amount == 0)
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            (*poutbuf)[i] = *state;
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    }
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    return 1;
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}
126

  
127 109
#ifdef CONFIG_DUMP_EXTRADATA_BSF
128 110
AVBitStreamFilter dump_extradata_bsf={
129 111
    "dump_extra",
......
139 121
    remove_extradata,
140 122
};
141 123
#endif
142

  
143
#ifdef CONFIG_NOISE_BSF
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AVBitStreamFilter noise_bsf={
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    "noise",
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    sizeof(int),
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    noise,
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};
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#endif
libavcodec/noise_bsf.c
1
/*
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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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 */
20

  
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#include "avcodec.h"
22

  
23

  
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static int noise(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){
27
    int amount= args ? atoi(args) : 10000;
28
    unsigned int *state= bsfc->priv_data;
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    int i;
30

  
31
    *poutbuf= av_malloc(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
32

  
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    memcpy(*poutbuf, buf, buf_size + FF_INPUT_BUFFER_PADDING_SIZE);
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    for(i=0; i<buf_size; i++){
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        (*state) += (*poutbuf)[i] + 1;
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        if(*state % amount == 0)
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            (*poutbuf)[i] = *state;
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    }
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    return 1;
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}
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AVBitStreamFilter noise_bsf={
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    "noise",
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    sizeof(int),
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    noise,
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};

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