X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fcabac.h;h=2794626c35dc7c958e8ff6503a9bc4482e973b61;hb=881b5b80da6bf63d01db5baa1db602a20f64b12c;hp=8b2e87b3c907dcde47f71d45c4ed7fe095dd9c2f;hpb=419b878494346c2f9d81f23d7a75cbe03eb5dab0;p=ffmpeg diff --git a/libavcodec/cabac.h b/libavcodec/cabac.h index 8b2e87b3c90..2794626c35d 100644 --- a/libavcodec/cabac.h +++ b/libavcodec/cabac.h @@ -17,23 +17,21 @@ * 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 - * */ /** - * @file cabac.h + * @file libavcodec/cabac.h * Context Adaptive Binary Arithmetic Coder. */ +#ifndef AVCODEC_CABAC_H +#define AVCODEC_CABAC_H + +#include "put_bits.h" //#undef NDEBUG #include -#ifdef ARCH_X86_64 -#define ARCH_X86 -#endif -#ifdef ARCH_X86 -#include "x86_cpu.h" -#endif +#include "libavutil/x86_cpu.h" #define CABAC_BITS 16 #define CABAC_MASK ((1<range&0xC0) + *state]; @@ -259,6 +258,7 @@ static void put_cabac_ueg(CABACContext *c, uint8_t * state, int v, int max, int put_cabac_bypass(c, sign); } } +#endif /* TEST */ static void refill(CABACContext *c){ #if CABAC_BITS == 16 @@ -270,6 +270,7 @@ static void refill(CABACContext *c){ c->bytestream+= CABAC_BITS/8; } +#if ! ( ARCH_X86 && HAVE_7REGS && HAVE_EBX_AVAILABLE && !defined(BROKEN_RELOCATIONS) ) static void refill2(CABACContext *c){ int i, x; @@ -287,6 +288,7 @@ static void refill2(CABACContext *c){ c->low += x<bytestream+= CABAC_BITS/8; } +#endif static inline void renorm_cabac_decoder(CABACContext *c){ while(c->range < 0x100){ @@ -302,7 +304,7 @@ static inline void renorm_cabac_decoder_once(CABACContext *c){ int temp; #if 0 //P3:683 athlon:475 - asm( + __asm__( "lea -0x100(%0), %2 \n\t" "shr $31, %2 \n\t" //FIXME 31->63 for x86-64 "shl %%cl, %0 \n\t" @@ -311,7 +313,7 @@ static inline void renorm_cabac_decoder_once(CABACContext *c){ ); #elif 0 //P3:680 athlon:474 - asm( + __asm__( "cmp $0x100, %0 \n\t" "setb %%cl \n\t" //FIXME 31->63 for x86-64 "shl %%cl, %0 \n\t" @@ -321,9 +323,9 @@ static inline void renorm_cabac_decoder_once(CABACContext *c){ #elif 1 int temp2; //P3:665 athlon:517 - asm( + __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" @@ -334,7 +336,7 @@ static inline void renorm_cabac_decoder_once(CABACContext *c){ #elif 0 int temp2; //P3:673 athlon:509 - asm( + __asm__( "cmp $0x100, %0 \n\t" "sbb %%edx, %%edx \n\t" "mov %0, %%eax \n\t" @@ -347,7 +349,7 @@ static inline void renorm_cabac_decoder_once(CABACContext *c){ #else int temp2; //P3:677 athlon:511 - asm( + __asm__( "cmp $0x100, %0 \n\t" "lea (%0, %0), %%eax \n\t" "lea (%1, %1), %%edx \n\t" @@ -366,11 +368,11 @@ static inline void renorm_cabac_decoder_once(CABACContext *c){ 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 +#if ARCH_X86_64 #define BYTESTART "16" #define BYTE "24" #define BYTEEND "32" @@ -379,11 +381,11 @@ static int always_inline get_cabac_inline(CABACContext *c, uint8_t * const state #define BYTE "16" #define BYTEEND "20" #endif -#if defined(ARCH_X86_32) && !(defined(PIC) && defined(__GNUC__)) +#if ARCH_X86 && HAVE_7REGS && HAVE_EBX_AVAILABLE && !defined(BROKEN_RELOCATIONS) int bit; #ifndef BRANCHLESS_CABAC_DECODER - asm volatile( + __asm__ volatile( "movzbl (%1), %0 \n\t" "movl "RANGE "(%2), %%ebx \n\t" "movl "RANGE "(%2), %%edx \n\t" @@ -457,7 +459,7 @@ static int always_inline get_cabac_inline(CABACContext *c, uint8_t * const state "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" ); @@ -465,7 +467,7 @@ static int always_inline get_cabac_inline(CABACContext *c, uint8_t * const state #else /* BRANCHLESS_CABAC_DECODER */ -#if defined CMOV_IS_FAST +#if 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"\ @@ -475,7 +477,7 @@ static int always_inline get_cabac_inline(CABACContext *c, uint8_t * const state "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"\ @@ -488,7 +490,7 @@ static int always_inline get_cabac_inline(CABACContext *c, uint8_t * const state "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)\ @@ -522,7 +524,7 @@ static int always_inline get_cabac_inline(CABACContext *c, uint8_t * const state "add "tmp" , "low" \n\t"\ "1: \n\t" - asm volatile( + __asm__ volatile( "movl "RANGE "(%2), %%esi \n\t" "movl "LOW "(%2), %%ebx \n\t" BRANCHLESS_GET_CABAC("%0", "%2", "(%1)", "%%ebx", "%%bx", "%%esi", "%%edx", "%%dl") @@ -535,33 +537,33 @@ static int always_inline get_cabac_inline(CABACContext *c, uint8_t * const state ); bit&=1; #endif /* BRANCHLESS_CABAC_DECODER */ -#else /* defined(ARCH_X86_32) && !(defined(PIC) && defined(__GNUC__)) */ +#else /* ARCH_X86 && HAVE_7REGS && 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<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; @@ -574,28 +576,28 @@ static int always_inline get_cabac_inline(CABACContext *c, uint8_t * const state if(!(c->low & CABAC_MASK)) refill2(c); #endif /* BRANCHLESS_CABAC_DECODER */ -#endif /* defined(ARCH_X86_32) && !(defined(PIC) && defined(__GNUC__)) */ +#endif /* ARCH_X86 && HAVE_7REGS && 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 av_unused get_cabac_noinline(CABACContext *c, uint8_t * const state){ return get_cabac_inline(c,state); } -static int get_cabac(CABACContext *c, uint8_t * const state){ +static int av_unused get_cabac(CABACContext *c, uint8_t * const state){ return get_cabac_inline(c,state); } -static int get_cabac_bypass(CABACContext *c){ +static int av_unused get_cabac_bypass(CABACContext *c){ #if 0 //not faster int bit; - asm volatile( + __asm__ volatile( "movl "RANGE "(%1), %%ebx \n\t" "movl "LOW "(%1), %%eax \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" "test %%ax, %%ax \n\t" @@ -623,7 +625,7 @@ static int get_cabac_bypass(CABACContext *c){ if(!(c->low & CABAC_MASK)) refill(c); - range= c->range<<17; + range= c->range<<(CABAC_BITS+1); if(c->low < range){ return 0; }else{ @@ -634,15 +636,15 @@ static int get_cabac_bypass(CABACContext *c){ } -static always_inline int get_cabac_bypass_sign(CABACContext *c, int val){ -#ifdef ARCH_X86 - asm volatile( +static av_always_inline int get_cabac_bypass_sign(CABACContext *c, int val){ +#if ARCH_X86 && HAVE_EBX_AVAILABLE + __asm__ volatile( "movl "RANGE "(%1), %%ebx \n\t" "movl "LOW "(%1), %%eax \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" @@ -672,7 +674,7 @@ static always_inline int get_cabac_bypass_sign(CABACContext *c, int val){ 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; @@ -681,123 +683,13 @@ static always_inline int get_cabac_bypass_sign(CABACContext *c, int val){ #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_32) && !(defined(PIC) && defined(__GNUC__)) -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_32) && !(defined(PIC) && defined(__GNUC__)) */ - /** * * @return the number of bytes read or 0 if no end */ -static int get_cabac_terminate(CABACContext *c){ +static int av_unused 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{ @@ -805,8 +697,9 @@ static int get_cabac_terminate(CABACContext *c){ } } +#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; @@ -860,3 +753,6 @@ static int get_cabac_ueg(CABACContext *c, uint8_t * state, int max, int is_signe }else return i; } +#endif /* 0 */ + +#endif /* AVCODEC_CABAC_H */