* 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"
+#include "libavutil/x86_cpu.h"
#endif
#define CABAC_BITS 16
}
}
+#ifdef TEST
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 /* TEST */
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){
//P3:665 athlon:517
asm(
"lea -0x100(%0), %%eax \n\t"
- "cdq \n\t"
+ "cltd \n\t"
"mov %0, %%eax \n\t"
"and %%edx, %0 \n\t"
"and %1, %%edx \n\t"
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(CONFIG_7REGS) && defined(HAVE_EBX_AVAILABLE)
+#if defined(ARCH_X86) && defined(HAVE_7REGS) && defined(HAVE_EBX_AVAILABLE) && !defined(BROKEN_RELOCATIONS)
int bit;
#ifndef BRANCHLESS_CABAC_DECODER
"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)
: "%"REG_c, "%ebx", "%edx", "%"REG_S, "memory"
);
);
bit&=1;
#endif /* BRANCHLESS_CABAC_DECODER */
-#else /* defined(ARCH_X86) && defined(CONFIG_7REGS) && defined(HAVE_EBX_AVAILABLE) */
+#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 & CABAC_MASK))
refill2(c);
#endif /* BRANCHLESS_CABAC_DECODER */
-#endif /* defined(ARCH_X86) && defined(CONFIG_7REGS) && defined(HAVE_EBX_AVAILABLE) */
+#endif /* defined(ARCH_X86) && defined(HAVE_7REGS) && defined(HAVE_EBX_AVAILABLE) && !defined(BROKEN_RELOCATIONS) */
return bit;
}
"shl $17, %%ebx \n\t"
"add %%eax, %%eax \n\t"
"sub %%ebx, %%eax \n\t"
- "cdq \n\t"
+ "cltd \n\t"
"and %%edx, %%ebx \n\t"
"add %%ebx, %%eax \n\t"
"test %%ax, %%ax \n\t"
"shl $17, %%ebx \n\t"
"add %%eax, %%eax \n\t"
"sub %%ebx, %%eax \n\t"
- "cdq \n\t"
+ "cltd \n\t"
"and %%edx, %%ebx \n\t"
"add %%ebx, %%eax \n\t"
"xor %%edx, %%ecx \n\t"
#endif
}
-//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(CONFIG_7REGS) && defined(HAVE_EBX_AVAILABLE)
-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;
- int minusindex= 4-(int)index;
- int coeff_count;
- asm volatile(
- "movl "RANGE "(%3), %%esi \n\t"
- "movl "LOW "(%3), %%ebx \n\t"
-
- "2: \n\t"
-
- BRANCHLESS_GET_CABAC("%%edx", "%3", "(%1)", "%%ebx", "%%bx", "%%esi", "%%eax", "%%al")
-
- "test $1, %%edx \n\t"
- " jz 3f \n\t"
-
- BRANCHLESS_GET_CABAC("%%edx", "%3", "61(%1)", "%%ebx", "%%bx", "%%esi", "%%eax", "%%al")
-
- "mov %2, %%"REG_a" \n\t"
- "movl %4, %%ecx \n\t"
- "add %1, %%"REG_c" \n\t"
- "movl %%ecx, (%%"REG_a") \n\t"
-
- "test $1, %%edx \n\t"
- " jnz 4f \n\t"
-
- "add $4, %%"REG_a" \n\t"
- "mov %%"REG_a", %2 \n\t"
-
- "3: \n\t"
- "add $1, %1 \n\t"
- "cmp %5, %1 \n\t"
- " jb 2b \n\t"
- "mov %2, %%"REG_a" \n\t"
- "movl %4, %%ecx \n\t"
- "add %1, %%"REG_c" \n\t"
- "movl %%ecx, (%%"REG_a") \n\t"
- "4: \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)\
- : "%"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;
- long last=0;
- asm volatile(
- "movl "RANGE "(%3), %%esi \n\t"
- "movl "LOW "(%3), %%ebx \n\t"
-
- "mov %1, %%"REG_D" \n\t"
- "2: \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", "(%%"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, %%"REG_D" \n\t"
-
- BRANCHLESS_GET_CABAC("%%edx", "%3", "15(%%"REG_D")", "%%ebx", "%%bx", "%%esi", "%%eax", "%%al")
-
- "mov %2, %%"REG_a" \n\t"
- "mov %1, %%edi \n\t"
- "movl %%edi, (%%"REG_a") \n\t"
-
- "test $1, %%edx \n\t"
- " jnz 4f \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"
- "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 %%esi, "RANGE "(%3) \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)\
- : "%"REG_c, "%ebx", "%edx", "%esi", "%"REG_D, "memory"\
- );
- return coeff_count;
-}
-#endif /* defined(ARCH_X86) && && defined(CONFIG_7REGS) && defined(HAVE_EBX_AVAILABLE) */
-
/**
*
* @return the number of bytes read or 0 if no end
}
}
+#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 */