opensource/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2025-06-25 17:47:25 +08:00
Code Issues Packages Projects Releases Wiki Activity

Get rid of av_random in cook.c

Browse Source 
Originally committed as revision 18079 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Benjamin Larsson
2009-03-20 21:32:30 +00:00
parent 3b0b84797e
commit 39b60944a8
1 changed files with 5 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
libavcodec/cook.c
View File

@ -46,7 +46,8 @@
#include <stddef.h> #include <stddef.h>
#include <stdio.h> #include <stdio.h>
#include "libavutil/random.h" #include "libavutil/lfg.h"
#include "libavutil/random_seed.h"
#include "avcodec.h" #include "avcodec.h"
#include "bitstream.h" #include "bitstream.h"
#include "dsputil.h" #include "dsputil.h"
@ -110,7 +111,7 @@ typedef struct cook {
int bits_per_subpacket; int bits_per_subpacket;
int cookversion; int cookversion;
/* states */ /* states */
AVRandomState random_state; AVLFG random_state;
/* transform data */ /* transform data */
MDCTContext mdct_ctx; MDCTContext mdct_ctx;
@ -541,7 +542,7 @@ static void scalar_dequant_float(COOKContext *q, int index, int quant_index,
} else { } else {
/* noise coding if subband_coef_index[i] == 0 */ /* noise coding if subband_coef_index[i] == 0 */
f1 = dither_tab[index]; f1 = dither_tab[index];
if (av_random(&q->random_state) < 0x80000000) f1 = -f1; if (av_lfg_get(&q->random_state) < 0x80000000) f1 = -f1;
} }
mlt_p[i] = f1 * rootpow2tab[quant_index+63]; mlt_p[i] = f1 * rootpow2tab[quant_index+63];
} }
@ -1066,7 +1067,7 @@ static av_cold int cook_decode_init(AVCodecContext *avctx)
q->bit_rate = avctx->bit_rate; q->bit_rate = avctx->bit_rate;
/* Initialize RNG. */ /* Initialize RNG. */
av_random_init(&q->random_state, 1); av_lfg_init(&q->random_state, ff_random_get_seed());
/* Initialize extradata related variables. */ /* Initialize extradata related variables. */
q->samples_per_channel = q->samples_per_frame / q->nb_channels; q->samples_per_channel = q->samples_per_frame / q->nb_channels;