mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-07 11:13:41 +02:00
65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
/*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* Libav is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
|
|
#include "libavutil/lfg.h"
|
|
#include "libavutil/log.h"
|
|
|
|
#include "libavcodec/rangecoder.h"
|
|
|
|
#define SIZE 10240
|
|
|
|
int main(void)
|
|
{
|
|
RangeCoder c;
|
|
uint8_t b[9 * SIZE];
|
|
uint8_t r[9 * SIZE];
|
|
int i;
|
|
uint8_t state[10];
|
|
AVLFG prng;
|
|
|
|
av_lfg_init(&prng, 1);
|
|
|
|
ff_init_range_encoder(&c, b, SIZE);
|
|
ff_build_rac_states(&c, 0.05 * (1LL << 32), 128 + 64 + 32 + 16);
|
|
|
|
memset(state, 128, sizeof(state));
|
|
|
|
for (i = 0; i < SIZE; i++)
|
|
r[i] = av_lfg_get(&prng) % 7;
|
|
|
|
for (i = 0; i < SIZE; i++)
|
|
put_rac(&c, state, r[i] & 1);
|
|
|
|
ff_rac_terminate(&c);
|
|
|
|
ff_init_range_decoder(&c, b, SIZE);
|
|
|
|
memset(state, 128, sizeof(state));
|
|
|
|
for (i = 0; i < SIZE; i++)
|
|
if ((r[i] & 1) != get_rac(&c, state)) {
|
|
av_log(NULL, AV_LOG_ERROR, "rac failure at %d\n", i);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|