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Merge commit '90558e848a'

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* commit '90558e848a':
  rangecoder: K&R formatting cosmetics

Conflicts:
	libavcodec/rangecoder.c
	libavcodec/rangecoder.h

Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-10-13 15:35:05 +02:00
commit c55bebe2cc
2 changed files with 103 additions and 95 deletions
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92
libavcodec/rangecoder.h
View file

@ -28,113 +28,119 @@
#define AVCODEC_RANGECODER_H
#include <stdint.h>
#include "libavutil/common.h"
#include "libavutil/avassert.h"
typedef struct RangeCoder{
typedef struct RangeCoder {
int low;
int range;
int outstanding_count;
int outstanding_byte;
uint8_t zero_state[256];
uint8_t one_state[256];
uint8_t one_state[256];
uint8_t *bytestream_start;
uint8_t *bytestream;
uint8_t *bytestream_end;
}RangeCoder;
} RangeCoder;
void ff_init_range_encoder(RangeCoder *c, uint8_t *buf, int buf_size);
void ff_init_range_decoder(RangeCoder *c, const uint8_t *buf, int buf_size);
int ff_rac_terminate(RangeCoder *c);
void ff_build_rac_states(RangeCoder *c, int factor, int max_p);
static inline void renorm_encoder(RangeCoder *c){
//FIXME optimize
while(c->range < 0x100){
if(c->outstanding_byte < 0){
c->outstanding_byte= c->low>>8;
}else if(c->low <= 0xFF00){
static inline void renorm_encoder(RangeCoder *c)
{
// FIXME: optimize
while (c->range < 0x100) {
if (c->outstanding_byte < 0) {
c->outstanding_byte = c->low >> 8;
} else if (c->low <= 0xFF00) {
*c->bytestream++ = c->outstanding_byte;
for(;c->outstanding_count; c->outstanding_count--)
for (; c->outstanding_count; c->outstanding_count--)
*c->bytestream++ = 0xFF;
c->outstanding_byte= c->low>>8;
}else if(c->low >= 0x10000){
c->outstanding_byte = c->low >> 8;
} else if (c->low >= 0x10000) {
*c->bytestream++ = c->outstanding_byte + 1;
for(;c->outstanding_count; c->outstanding_count--)
for (; c->outstanding_count; c->outstanding_count--)
*c->bytestream++ = 0x00;
c->outstanding_byte= (c->low>>8) & 0xFF;
}else{
c->outstanding_byte = (c->low >> 8) & 0xFF;
} else {
c->outstanding_count++;
}
c->low = (c->low & 0xFF)<<8;
c->low = (c->low & 0xFF) << 8;
c->range <<= 8;
}
}
static inline int get_rac_count(RangeCoder *c){
int x= c->bytestream - c->bytestream_start + c->outstanding_count;
if(c->outstanding_byte >= 0)
static inline int get_rac_count(RangeCoder *c)
{
int x = c->bytestream - c->bytestream_start + c->outstanding_count;
if (c->outstanding_byte >= 0)
x++;
return 8*x - av_log2(c->range);
return 8 * x - av_log2(c->range);
}
static inline void put_rac(RangeCoder *c, uint8_t * const state, int bit){
int range1= (c->range * (*state)) >> 8;
static inline void put_rac(RangeCoder *c, uint8_t *const state, int bit)
{
int range1 = (c->range * (*state)) >> 8;
av_assert2(*state);
av_assert2(range1 < c->range);
av_assert2(range1 > 0);
if(!bit){
if (!bit) {
c->range -= range1;
*state= c->zero_state[*state];
}else{
c->low += c->range - range1;
*state = c->zero_state[*state];
} else {
c->low += c->range - range1;
c->range = range1;
*state= c->one_state[*state];
*state = c->one_state[*state];
}
renorm_encoder(c);
}
static inline void refill(RangeCoder *c){
if(c->range < 0x100){
static inline void refill(RangeCoder *c)
{
if (c->range < 0x100) {
c->range <<= 8;
c->low <<= 8;
if(c->bytestream < c->bytestream_end)
c->low+= c->bytestream[0];
c->low <<= 8;
if (c->bytestream < c->bytestream_end)
c->low += c->bytestream[0];
c->bytestream++;
}
}
static inline int get_rac(RangeCoder *c, uint8_t * const state){
int range1= (c->range * (*state)) >> 8;
static inline int get_rac(RangeCoder *c, uint8_t *const state)
{
int range1 = (c->range * (*state)) >> 8;
int av_unused one_mask;
c->range -= range1;
#if 1
if(c->low < c->range){
*state= c->zero_state[*state];
if (c->low < c->range) {
*state = c->zero_state[*state];
refill(c);
return 0;
}else{
c->low -= c->range;
*state= c->one_state[*state];
} else {
c->low -= c->range;
*state = c->one_state[*state];
c->range = range1;
refill(c);
return 1;
}
#else
one_mask= (c->range - c->low-1)>>31;
one_mask = (c->range - c->low - 1) >> 31;
c->low -= c->range & one_mask;
c->low -= c->range & one_mask;
c->range += (range1 - c->range) & one_mask;
*state= c->zero_state[(*state) + (256&one_mask)];
*state = c->zero_state[(*state) + (256 & one_mask)];
refill(c);
return one_mask&1;
return one_mask & 1;
#endif
}