* 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
- *
*/
/**
* Context Adaptive Binary Arithmetic Coder.
*/
+#ifndef FFMPEG_CABAC_H
+#define FFMPEG_CABAC_H
+
+#include "bitstream.h"
//#undef NDEBUG
#include <assert.h>
+#ifdef ARCH_X86
+#include "x86_cpu.h"
+#endif
#define CABAC_BITS 16
#define CABAC_MASK ((1<<CABAC_BITS)-1)
}
}
+#if 0
static void put_cabac(CABACContext *c, uint8_t * const state, int bit){
int RangeLPS= ff_h264_lps_range[2*(c->range&0xC0) + *state];
put_cabac_bypass(c, sign);
}
}
+#endif /* 0 */
static void refill(CABACContext *c){
#if CABAC_BITS == 16
c->bytestream+= CABAC_BITS/8;
}
+#if ! ( defined(ARCH_X86) && defined(HAVE_7REGS) && defined(HAVE_EBX_AVAILABLE) && !defined(BROKEN_RELOCATIONS) )
static void refill2(CABACContext *c){
int i, x;
c->low += x<<i;
c->bytestream+= CABAC_BITS/8;
}
+#endif
static inline void renorm_cabac_decoder(CABACContext *c){
while(c->range < 0x100){
refill(c);
}
-static int 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"
+#ifdef ARCH_X86_64
+#define BYTESTART "16"
+#define BYTE "24"
+#define BYTEEND "32"
+#else
#define BYTESTART "12"
#define BYTE "16"
#define BYTEEND "20"
-#if defined(ARCH_X86) && !(defined(PIC) && defined(__GNUC__))
+#endif
+#if defined(ARCH_X86) && defined(HAVE_7REGS) && defined(HAVE_EBX_AVAILABLE) && !defined(BROKEN_RELOCATIONS)
int bit;
#ifndef BRANCHLESS_CABAC_DECODER
//eax:state ebx:low, edx:range, esi:RangeLPS
"test %%bx, %%bx \n\t"
" jnz 2f \n\t"
- "movl "BYTE "(%2), %%esi \n\t"
+ "mov "BYTE "(%2), %%"REG_S" \n\t"
"subl $0xFFFF, %%ebx \n\t"
- "movzwl (%%esi), %%ecx \n\t"
+ "movzwl (%%"REG_S"), %%ecx \n\t"
"bswap %%ecx \n\t"
"shrl $15, %%ecx \n\t"
- "addl $2, %%esi \n\t"
+ "add $2, %%"REG_S" \n\t"
"addl %%ecx, %%ebx \n\t"
- "movl %%esi, "BYTE "(%2) \n\t"
+ "mov %%"REG_S", "BYTE "(%2) \n\t"
"jmp 2f \n\t"
"1: \n\t"
//eax:state ebx:low, edx:range, esi:RangeLPS
"shll %%cl, %%edx \n\t"
"movzbl "MANGLE(ff_h264_lps_state)"(%0), %%ecx \n\t"
"movb %%cl, (%1) \n\t"
- "addl $1, %0 \n\t"
+ "add $1, %0 \n\t"
"test %%bx, %%bx \n\t"
" jnz 2f \n\t"
- "movl "BYTE "(%2), %%ecx \n\t"
- "movzwl (%%ecx), %%esi \n\t"
+ "mov "BYTE "(%2), %%"REG_c" \n\t"
+ "movzwl (%%"REG_c"), %%esi \n\t"
"bswap %%esi \n\t"
"shrl $15, %%esi \n\t"
"subl $0xFFFF, %%esi \n\t"
- "addl $2, %%ecx \n\t"
- "movl %%ecx, "BYTE "(%2) \n\t"
+ "add $2, %%"REG_c" \n\t"
+ "mov %%"REG_c", "BYTE "(%2) \n\t"
"leal -1(%%ebx), %%ecx \n\t"
"xorl %%ebx, %%ecx \n\t"
"2: \n\t"
"movl %%edx, "RANGE "(%2) \n\t"
"movl %%ebx, "LOW "(%2) \n\t"
- :"=&a"(bit) //FIXME this is fragile gcc either runs out of registers or misscompiles it (for example if "+a"(bit) or "+m"(*state) is used
+ :"=&a"(bit) //FIXME this is fragile gcc either runs out of registers or miscompiles it (for example if "+a"(bit) or "+m"(*state) is used
:"r"(state), "r"(c)
- : "%ecx", "%ebx", "%edx", "%esi", "memory"
+ : "%"REG_c, "%ebx", "%edx", "%"REG_S, "memory"
);
bit&=1;
#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)\
"shl %%cl , "low" \n\t"\
"test "lowword" , "lowword" \n\t"\
" jnz 1f \n\t"\
- "mov "BYTE"("cabac"), %%ecx \n\t"\
- "movzwl (%%ecx) , "tmp" \n\t"\
+ "mov "BYTE"("cabac"), %%"REG_c" \n\t"\
+ "movzwl (%%"REG_c") , "tmp" \n\t"\
"bswap "tmp" \n\t"\
"shr $15 , "tmp" \n\t"\
"sub $0xFFFF , "tmp" \n\t"\
- "add $2 , %%ecx \n\t"\
- "mov %%ecx , "BYTE "("cabac") \n\t"\
+ "add $2 , %%"REG_c" \n\t"\
+ "mov %%"REG_c" , "BYTE "("cabac") \n\t"\
"lea -1("low") , %%ecx \n\t"\
"xor "low" , %%ecx \n\t"\
"shr $15 , %%ecx \n\t"\
:"=&a"(bit)
:"r"(state), "r"(c)
- : "%ecx", "%ebx", "%edx", "%esi", "memory"
+ : "%"REG_c, "%ebx", "%edx", "%esi", "memory"
);
bit&=1;
#endif /* BRANCHLESS_CABAC_DECODER */
-#else /* defined(ARCH_X86) && !(defined(PIC) && defined(__GNUC__)) */
+#else /* defined(ARCH_X86) && defined(HAVE_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(HAVE_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);
}
"add %%ebx, %%eax \n\t"
"test %%ax, %%ax \n\t"
" jnz 1f \n\t"
- "movl "BYTE "(%1), %%ebx \n\t"
+ "movl "BYTE "(%1), %%"REG_b" \n\t"
"subl $0xFFFF, %%eax \n\t"
- "movzwl (%%ebx), %%ecx \n\t"
+ "movzwl (%%"REG_b"), %%ecx \n\t"
"bswap %%ecx \n\t"
"shrl $15, %%ecx \n\t"
- "addl $2, %%ebx \n\t"
+ "addl $2, %%"REG_b" \n\t"
"addl %%ecx, %%eax \n\t"
- "movl %%ebx, "BYTE "(%1) \n\t"
+ "movl %%"REG_b", "BYTE "(%1) \n\t"
"1: \n\t"
"movl %%eax, "LOW "(%1) \n\t"
:"=&d"(bit)
:"r"(c)
- : "%eax", "%ebx", "%ecx", "memory"
+ : "%eax", "%"REG_b, "%ecx", "memory"
);
return bit+1;
#else
if(!(c->low & CABAC_MASK))
refill(c);
- range= c->range<<17;
+ range= c->range<<(CABAC_BITS+1);
if(c->low < range){
return 0;
}else{
}
-static always_inline int get_cabac_bypass_sign(CABACContext *c, int val){
-#ifdef ARCH_X86
+static av_always_inline int get_cabac_bypass_sign(CABACContext *c, int val){
+#if defined(ARCH_X86) && !(defined(PIC) && defined(__GNUC__))
asm volatile(
"movl "RANGE "(%1), %%ebx \n\t"
"movl "LOW "(%1), %%eax \n\t"
"sub %%edx, %%ecx \n\t"
"test %%ax, %%ax \n\t"
" jnz 1f \n\t"
- "movl "BYTE "(%1), %%ebx \n\t"
+ "mov "BYTE "(%1), %%"REG_b" \n\t"
"subl $0xFFFF, %%eax \n\t"
- "movzwl (%%ebx), %%edx \n\t"
+ "movzwl (%%"REG_b"), %%edx \n\t"
"bswap %%edx \n\t"
"shrl $15, %%edx \n\t"
- "addl $2, %%ebx \n\t"
+ "add $2, %%"REG_b" \n\t"
"addl %%edx, %%eax \n\t"
- "movl %%ebx, "BYTE "(%1) \n\t"
+ "mov %%"REG_b", "BYTE "(%1) \n\t"
"1: \n\t"
"movl %%eax, "LOW "(%1) \n\t"
:"+c"(val)
:"r"(c)
- : "%eax", "%ebx", "%edx", "memory"
+ : "%eax", "%"REG_b, "%edx", "memory"
);
return val;
#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)
-#ifdef ARCH_X86
+//FIXME use some macros to avoid duplicatin get_cabac (cannot be done yet as that would make optimization work hard)
+#if defined(ARCH_X86) && defined(HAVE_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;
BRANCHLESS_GET_CABAC("%%edx", "%3", "61(%1)", "%%ebx", "%%bx", "%%esi", "%%eax", "%%al")
- "movl %2, %%eax \n\t"
+ "mov %2, %%"REG_a" \n\t"
"movl %4, %%ecx \n\t"
- "addl %1, %%ecx \n\t"
- "movl %%ecx, (%%eax) \n\t"
+ "add %1, %%"REG_c" \n\t"
+ "movl %%ecx, (%%"REG_a") \n\t"
"test $1, %%edx \n\t"
" jnz 4f \n\t"
- "addl $4, %%eax \n\t"
- "movl %%eax, %2 \n\t"
+ "add $4, %%"REG_a" \n\t"
+ "mov %%"REG_a", %2 \n\t"
"3: \n\t"
- "addl $1, %1 \n\t"
- "cmpl %5, %1 \n\t"
+ "add $1, %1 \n\t"
+ "cmp %5, %1 \n\t"
" jb 2b \n\t"
- "movl %2, %%eax \n\t"
+ "mov %2, %%"REG_a" \n\t"
"movl %4, %%ecx \n\t"
- "addl %1, %%ecx \n\t"
- "movl %%ecx, (%%eax) \n\t"
+ "add %1, %%"REG_c" \n\t"
+ "movl %%ecx, (%%"REG_a") \n\t"
"4: \n\t"
- "addl %6, %%eax \n\t"
+ "add %6, %%eax \n\t"
"shr $2, %%eax \n\t"
"movl %%esi, "RANGE "(%3) \n\t"
"movl %%ebx, "LOW "(%3) \n\t"
:"=&a"(coeff_count), "+r"(significant_coeff_ctx_base), "+m"(index)\
:"r"(c), "m"(minusstart), "m"(end), "m"(minusindex)\
- : "%ecx", "%ebx", "%edx", "%esi", "memory"\
+ : "%"REG_c, "%ebx", "%edx", "%esi", "memory"\
);
return coeff_count;
}
static int decode_significance_8x8_x86(CABACContext *c, uint8_t *significant_coeff_ctx_base, int *index, uint8_t *sig_off){
int minusindex= 4-(int)index;
int coeff_count;
- int last=0;
+ long last=0;
asm volatile(
"movl "RANGE "(%3), %%esi \n\t"
"movl "LOW "(%3), %%ebx \n\t"
- "mov %1, %%edi \n\t"
+ "mov %1, %%"REG_D" \n\t"
"2: \n\t"
- "mov %6, %%eax \n\t"
- "movzbl (%%eax, %%edi), %%edi \n\t"
- "add %5, %%edi \n\t"
+ "mov %6, %%"REG_a" \n\t"
+ "movzbl (%%"REG_a", %%"REG_D"), %%edi \n\t"
+ "add %5, %%"REG_D" \n\t"
- BRANCHLESS_GET_CABAC("%%edx", "%3", "(%%edi)", "%%ebx", "%%bx", "%%esi", "%%eax", "%%al")
+ BRANCHLESS_GET_CABAC("%%edx", "%3", "(%%"REG_D")", "%%ebx", "%%bx", "%%esi", "%%eax", "%%al")
"mov %1, %%edi \n\t"
"test $1, %%edx \n\t"
" jz 3f \n\t"
"movzbl "MANGLE(last_coeff_flag_offset_8x8)"(%%edi), %%edi\n\t"
- "add %5, %%edi \n\t"
+ "add %5, %%"REG_D" \n\t"
- BRANCHLESS_GET_CABAC("%%edx", "%3", "15(%%edi)", "%%ebx", "%%bx", "%%esi", "%%eax", "%%al")
+ BRANCHLESS_GET_CABAC("%%edx", "%3", "15(%%"REG_D")", "%%ebx", "%%bx", "%%esi", "%%eax", "%%al")
- "movl %2, %%eax \n\t"
+ "mov %2, %%"REG_a" \n\t"
"mov %1, %%edi \n\t"
- "movl %%edi, (%%eax) \n\t"
+ "movl %%edi, (%%"REG_a") \n\t"
"test $1, %%edx \n\t"
" jnz 4f \n\t"
- "addl $4, %%eax \n\t"
- "movl %%eax, %2 \n\t"
+ "add $4, %%"REG_a" \n\t"
+ "mov %%"REG_a", %2 \n\t"
"3: \n\t"
"addl $1, %%edi \n\t"
"mov %%edi, %1 \n\t"
"cmpl $63, %%edi \n\t"
" jb 2b \n\t"
- "movl %2, %%eax \n\t"
- "movl %%edi, (%%eax) \n\t"
+ "mov %2, %%"REG_a" \n\t"
+ "movl %%edi, (%%"REG_a") \n\t"
"4: \n\t"
"addl %4, %%eax \n\t"
"shr $2, %%eax \n\t"
"movl %%ebx, "LOW "(%3) \n\t"
:"=&a"(coeff_count),"+m"(last), "+m"(index)\
:"r"(c), "m"(minusindex), "m"(significant_coeff_ctx_base), "m"(sig_off)\
- : "%ecx", "%ebx", "%edx", "%esi", "%edi", "memory"\
+ : "%"REG_c, "%ebx", "%edx", "%esi", "%"REG_D, "memory"\
);
return coeff_count;
}
-#endif
+#endif /* defined(ARCH_X86) && && defined(HAVE_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{
}
}
+#if 0
/**
- * get (truncated) unnary binarization.
+ * Get (truncated) unary binarization.
*/
static int get_cabac_u(CABACContext *c, uint8_t * state, int max, int max_index, int truncated){
int i;
}else
return i;
}
+#endif /* 0 */
+
+#endif /* FFMPEG_CABAC_H */
projects / ffmpeg / blobdiff