mirror of
https://github.com/pineappleEA/pineapple-src.git
synced 2024-12-09 05:08:23 -05:00
166 lines
4.0 KiB
C
166 lines
4.0 KiB
C
|
/*
|
||
|
* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
|
||
|
*
|
||
|
* This file is part of FFmpeg.
|
||
|
*
|
||
|
* FFmpeg 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.
|
||
|
*
|
||
|
* FFmpeg 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 FFmpeg; if not, write to the Free Software
|
||
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||
|
*/
|
||
|
|
||
|
#include "libavcodec/cabac.c"
|
||
|
|
||
|
#define SIZE 10240
|
||
|
|
||
|
#include "libavutil/lfg.h"
|
||
|
#include "libavcodec/avcodec.h"
|
||
|
|
||
|
static inline void put_cabac_bit(CABACContext *c, int b){
|
||
|
put_bits(&c->pb, 1, b);
|
||
|
for(;c->outstanding_count; c->outstanding_count--){
|
||
|
put_bits(&c->pb, 1, 1-b);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static inline void renorm_cabac_encoder(CABACContext *c){
|
||
|
while(c->range < 0x100){
|
||
|
//FIXME optimize
|
||
|
if(c->low<0x100){
|
||
|
put_cabac_bit(c, 0);
|
||
|
}else if(c->low<0x200){
|
||
|
c->outstanding_count++;
|
||
|
c->low -= 0x100;
|
||
|
}else{
|
||
|
put_cabac_bit(c, 1);
|
||
|
c->low -= 0x200;
|
||
|
}
|
||
|
|
||
|
c->range+= c->range;
|
||
|
c->low += c->low;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static void put_cabac(CABACContext *c, uint8_t * const state, int bit){
|
||
|
int RangeLPS= ff_h264_lps_range[2*(c->range&0xC0) + *state];
|
||
|
|
||
|
if(bit == ((*state)&1)){
|
||
|
c->range -= RangeLPS;
|
||
|
*state = ff_h264_mlps_state[128 + *state];
|
||
|
}else{
|
||
|
c->low += c->range - RangeLPS;
|
||
|
c->range = RangeLPS;
|
||
|
*state= ff_h264_mlps_state[127 - *state];
|
||
|
}
|
||
|
|
||
|
renorm_cabac_encoder(c);
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* @param bit 0 -> write zero bit, !=0 write one bit
|
||
|
*/
|
||
|
static void put_cabac_bypass(CABACContext *c, int bit){
|
||
|
c->low += c->low;
|
||
|
|
||
|
if(bit){
|
||
|
c->low += c->range;
|
||
|
}
|
||
|
//FIXME optimize
|
||
|
if(c->low<0x200){
|
||
|
put_cabac_bit(c, 0);
|
||
|
}else if(c->low<0x400){
|
||
|
c->outstanding_count++;
|
||
|
c->low -= 0x200;
|
||
|
}else{
|
||
|
put_cabac_bit(c, 1);
|
||
|
c->low -= 0x400;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
*
|
||
|
* @return the number of bytes written
|
||
|
*/
|
||
|
static int put_cabac_terminate(CABACContext *c, int bit){
|
||
|
c->range -= 2;
|
||
|
|
||
|
if(!bit){
|
||
|
renorm_cabac_encoder(c);
|
||
|
}else{
|
||
|
c->low += c->range;
|
||
|
c->range= 2;
|
||
|
|
||
|
renorm_cabac_encoder(c);
|
||
|
|
||
|
av_assert0(c->low <= 0x1FF);
|
||
|
put_cabac_bit(c, c->low>>9);
|
||
|
put_bits(&c->pb, 2, ((c->low>>7)&3)|1);
|
||
|
|
||
|
flush_put_bits(&c->pb); //FIXME FIXME FIXME XXX wrong
|
||
|
}
|
||
|
|
||
|
return (put_bits_count(&c->pb)+7)>>3;
|
||
|
}
|
||
|
|
||
|
int main(void){
|
||
|
CABACContext c;
|
||
|
uint8_t b[9*SIZE];
|
||
|
uint8_t r[9*SIZE];
|
||
|
int i, ret = 0;
|
||
|
uint8_t state[10]= {0};
|
||
|
AVLFG prng;
|
||
|
|
||
|
av_lfg_init(&prng, 1);
|
||
|
ff_init_cabac_encoder(&c, b, SIZE);
|
||
|
|
||
|
for(i=0; i<SIZE; i++){
|
||
|
if(2*i<SIZE) r[i] = av_lfg_get(&prng) % 7;
|
||
|
else r[i] = (i>>8)&1;
|
||
|
}
|
||
|
|
||
|
for(i=0; i<SIZE; i++){
|
||
|
put_cabac_bypass(&c, r[i]&1);
|
||
|
}
|
||
|
|
||
|
for(i=0; i<SIZE; i++){
|
||
|
put_cabac(&c, state, r[i]&1);
|
||
|
}
|
||
|
|
||
|
i= put_cabac_terminate(&c, 1);
|
||
|
b[i++] = av_lfg_get(&prng);
|
||
|
b[i ] = av_lfg_get(&prng);
|
||
|
|
||
|
ff_init_cabac_decoder(&c, b, SIZE);
|
||
|
|
||
|
memset(state, 0, sizeof(state));
|
||
|
|
||
|
for(i=0; i<SIZE; i++){
|
||
|
if( (r[i]&1) != get_cabac_bypass(&c) ) {
|
||
|
av_log(NULL, AV_LOG_ERROR, "CABAC bypass failure at %d\n", i);
|
||
|
ret = 1;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
for(i=0; i<SIZE; i++){
|
||
|
if( (r[i]&1) != get_cabac_noinline(&c, state) ) {
|
||
|
av_log(NULL, AV_LOG_ERROR, "CABAC failure at %d\n", i);
|
||
|
ret = 1;
|
||
|
}
|
||
|
}
|
||
|
if(!get_cabac_terminate(&c)) {
|
||
|
av_log(NULL, AV_LOG_ERROR, "where's the Terminator?\n");
|
||
|
ret = 1;
|
||
|
}
|
||
|
|
||
|
return ret;
|
||
|
}
|