* Context Adaptive Binary Arithmetic Coder.
*/
+#ifndef CABAC_H
+#define CABAC_H
+
+#include "bitstream.h"
//#undef NDEBUG
#include <assert.h>
refill(c);
}
-static int av_always_inline get_cabac_inline(CABACContext *c, uint8_t * const state){
+static av_always_inline int get_cabac_inline(CABACContext *c, uint8_t * const state){
//FIXME gcc generates duplicate load/stores for c->low and c->range
#define LOW "0"
#define RANGE "4"
#define BYTE "16"
#define BYTEEND "20"
#endif
-#if defined(ARCH_X86) && !(defined(PIC) && defined(__GNUC__))
+#if defined(ARCH_X86) && defined(CONFIG_7REGS) && defined(HAVE_EBX_AVAILABLE) && !defined(BROKEN_RELOCATIONS)
int bit;
#ifndef BRANCHLESS_CABAC_DECODER
#else /* BRANCHLESS_CABAC_DECODER */
-#if defined CMOV_IS_FAST
+#if defined HAVE_FAST_CMOV
#define BRANCHLESS_GET_CABAC_UPDATE(ret, cabac, statep, low, lowword, range, tmp, tmpbyte)\
"mov "tmp" , %%ecx \n\t"\
"shl $17 , "tmp" \n\t"\
"and %%ecx , "tmp" \n\t"\
"sub "tmp" , "low" \n\t"\
"xor %%ecx , "ret" \n\t"
-#else /* CMOV_IS_FAST */
+#else /* HAVE_FAST_CMOV */
#define BRANCHLESS_GET_CABAC_UPDATE(ret, cabac, statep, low, lowword, range, tmp, tmpbyte)\
"mov "tmp" , %%ecx \n\t"\
"shl $17 , "tmp" \n\t"\
"and "tmp" , %%ecx \n\t"\
"sub %%ecx , "low" \n\t"\
"xor "tmp" , "ret" \n\t"
-#endif /* CMOV_IS_FAST */
+#endif /* HAVE_FAST_CMOV */
#define BRANCHLESS_GET_CABAC(ret, cabac, statep, low, lowword, range, tmp, tmpbyte)\
);
bit&=1;
#endif /* BRANCHLESS_CABAC_DECODER */
-#else /* defined(ARCH_X86) && !(defined(PIC) && defined(__GNUC__)) */
+#else /* defined(ARCH_X86) && defined(CONFIG_7REGS) && defined(HAVE_EBX_AVAILABLE) && !defined(BROKEN_RELOCATIONS) */
int s = *state;
int RangeLPS= ff_h264_lps_range[2*(c->range&0xC0) + s];
- int bit, lps_mask attribute_unused;
+ int bit, lps_mask av_unused;
c->range -= RangeLPS;
#ifndef BRANCHLESS_CABAC_DECODER
- if(c->low < (c->range<<17)){
+ if(c->low < (c->range<<(CABAC_BITS+1))){
bit= s&1;
*state= ff_h264_mps_state[s];
renorm_cabac_decoder_once(c);
}else{
bit= ff_h264_norm_shift[RangeLPS];
- c->low -= (c->range<<17);
+ c->low -= (c->range<<(CABAC_BITS+1));
*state= ff_h264_lps_state[s];
c->range = RangeLPS<<bit;
c->low <<= bit;
bit= (s&1)^1;
- if(!(c->low & 0xFFFF)){
+ if(!(c->low & CABAC_MASK)){
refill2(c);
}
}
#else /* BRANCHLESS_CABAC_DECODER */
- lps_mask= ((c->range<<17) - c->low)>>31;
+ lps_mask= ((c->range<<(CABAC_BITS+1)) - c->low)>>31;
- c->low -= (c->range<<17) & lps_mask;
+ c->low -= (c->range<<(CABAC_BITS+1)) & lps_mask;
c->range += (RangeLPS - c->range) & lps_mask;
s^=lps_mask;
if(!(c->low & CABAC_MASK))
refill2(c);
#endif /* BRANCHLESS_CABAC_DECODER */
-#endif /* defined(ARCH_X86) && !(defined(PIC) && defined(__GNUC__)) */
+#endif /* defined(ARCH_X86) && defined(CONFIG_7REGS) && defined(HAVE_EBX_AVAILABLE) && !defined(BROKEN_RELOCATIONS) */
return bit;
}
-static int __attribute((noinline)) get_cabac_noinline(CABACContext *c, uint8_t * const state){
+static int av_noinline get_cabac_noinline(CABACContext *c, uint8_t * const state){
return get_cabac_inline(c,state);
}
if(!(c->low & CABAC_MASK))
refill(c);
- range= c->range<<17;
+ range= c->range<<(CABAC_BITS+1);
if(c->low < range){
return 0;
}else{
if(!(c->low & CABAC_MASK))
refill(c);
- range= c->range<<17;
+ range= c->range<<(CABAC_BITS+1);
c->low -= range;
mask= c->low >> 31;
range &= mask;
//FIXME the x86 code from this file should be moved into i386/h264 or cabac something.c/h (note ill kill you if you move my code away from under my fingers before iam finished with it!)
//FIXME use some macros to avoid duplicatin get_cabac (cant be done yet as that would make optimization work hard)
-#if defined(ARCH_X86) && !(defined(PIC) && defined(__GNUC__))
+#if defined(ARCH_X86) && defined(CONFIG_7REGS) && defined(HAVE_EBX_AVAILABLE) && !defined(BROKEN_RELOCATIONS)
static int decode_significance_x86(CABACContext *c, int max_coeff, uint8_t *significant_coeff_ctx_base, int *index){
void *end= significant_coeff_ctx_base + max_coeff - 1;
int minusstart= -(int)significant_coeff_ctx_base;
);
return coeff_count;
}
-#endif /* defined(ARCH_X86) && !(defined(PIC) && defined(__GNUC__)) */
+#endif /* defined(ARCH_X86) && && defined(CONFIG_7REGS) && defined(HAVE_EBX_AVAILABLE) && !defined(BROKEN_RELOCATIONS) */
/**
*
*/
static int get_cabac_terminate(CABACContext *c){
c->range -= 2;
- if(c->low < c->range<<17){
+ if(c->low < c->range<<(CABAC_BITS+1)){
renorm_cabac_decoder_once(c);
return 0;
}else{
}else
return i;
}
+
+#endif /* CABAC_H */