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328 lines
8.2 KiB
328 lines
8.2 KiB
/* |
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* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* @file libavutil/internal.h |
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* common internal API header |
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*/ |
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#ifndef AVUTIL_INTERNAL_H |
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#define AVUTIL_INTERNAL_H |
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#if !defined(DEBUG) && !defined(NDEBUG) |
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# define NDEBUG |
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#endif |
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#include <limits.h> |
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#include <stdint.h> |
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#include <stddef.h> |
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#include <assert.h> |
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#include "config.h" |
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#include "common.h" |
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#include "mem.h" |
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#include "timer.h" |
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#ifndef attribute_align_arg |
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#if (!defined(__ICC) || __ICC > 1100) && AV_GCC_VERSION_AT_LEAST(4,2) |
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# define attribute_align_arg __attribute__((force_align_arg_pointer)) |
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#else |
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# define attribute_align_arg |
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#endif |
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#endif |
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#ifndef attribute_used |
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#if AV_GCC_VERSION_AT_LEAST(3,1) |
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# define attribute_used __attribute__((used)) |
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#else |
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# define attribute_used |
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#endif |
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#endif |
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#ifndef INT16_MIN |
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#define INT16_MIN (-0x7fff-1) |
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#endif |
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#ifndef INT16_MAX |
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#define INT16_MAX 0x7fff |
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#endif |
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#ifndef INT32_MIN |
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#define INT32_MIN (-0x7fffffff-1) |
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#endif |
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#ifndef INT32_MAX |
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#define INT32_MAX 0x7fffffff |
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#endif |
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#ifndef UINT32_MAX |
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#define UINT32_MAX 0xffffffff |
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#endif |
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#ifndef INT64_MIN |
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#define INT64_MIN (-0x7fffffffffffffffLL-1) |
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#endif |
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#ifndef INT64_MAX |
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#define INT64_MAX INT64_C(9223372036854775807) |
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#endif |
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#ifndef UINT64_MAX |
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#define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF) |
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#endif |
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#ifndef INT_BIT |
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# define INT_BIT (CHAR_BIT * sizeof(int)) |
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#endif |
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#if ( defined(__PIC__) || defined(__pic__) ) && ! defined(PIC) |
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# define PIC |
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#endif |
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#ifndef offsetof |
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# define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F)) |
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#endif |
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// Use rip-relative addressing if compiling PIC code on x86-64. |
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#if ARCH_X86_64 && defined(PIC) |
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# define LOCAL_MANGLE(a) #a "(%%rip)" |
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#else |
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# define LOCAL_MANGLE(a) #a |
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#endif |
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#define MANGLE(a) EXTERN_PREFIX LOCAL_MANGLE(a) |
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/* debug stuff */ |
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/* dprintf macros */ |
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#ifdef DEBUG |
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# define dprintf(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__) |
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#else |
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# define dprintf(pctx, ...) |
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#endif |
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#define av_abort() do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0) |
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/* math */ |
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extern const uint32_t ff_inverse[256]; |
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#if ARCH_X86 |
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# define FASTDIV(a,b) \ |
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({\ |
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int ret,dmy;\ |
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__asm__ volatile(\ |
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"mull %3"\ |
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:"=d"(ret),"=a"(dmy)\ |
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:"1"(a),"g"(ff_inverse[b])\ |
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);\ |
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ret;\ |
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}) |
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#elif HAVE_ARMV6 |
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static inline av_const int FASTDIV(int a, int b) |
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{ |
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int r, t; |
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__asm__ volatile("cmp %3, #2 \n\t" |
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"ldr %1, [%4, %3, lsl #2] \n\t" |
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"lsrle %0, %2, #1 \n\t" |
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"smmulgt %0, %1, %2 \n\t" |
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: "=&r"(r), "=&r"(t) : "r"(a), "r"(b), "r"(ff_inverse)); |
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return r; |
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} |
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#elif ARCH_ARM |
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static inline av_const int FASTDIV(int a, int b) |
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{ |
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int r, t; |
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__asm__ volatile ("umull %1, %0, %2, %3" |
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: "=&r"(r), "=&r"(t) : "r"(a), "r"(ff_inverse[b])); |
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return r; |
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} |
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#elif CONFIG_FASTDIV |
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# define FASTDIV(a,b) ((uint32_t)((((uint64_t)a)*ff_inverse[b])>>32)) |
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#else |
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# define FASTDIV(a,b) ((a)/(b)) |
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#endif |
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extern const uint8_t ff_sqrt_tab[256]; |
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static inline av_const unsigned int ff_sqrt(unsigned int a) |
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{ |
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unsigned int b; |
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if(a<255) return (ff_sqrt_tab[a+1]-1)>>4; |
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else if(a<(1<<12)) b= ff_sqrt_tab[a>>4 ]>>2; |
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#if !CONFIG_SMALL |
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else if(a<(1<<14)) b= ff_sqrt_tab[a>>6 ]>>1; |
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else if(a<(1<<16)) b= ff_sqrt_tab[a>>8 ] ; |
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#endif |
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else{ |
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int s= av_log2_16bit(a>>16)>>1; |
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unsigned int c= a>>(s+2); |
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b= ff_sqrt_tab[c>>(s+8)]; |
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b= FASTDIV(c,b) + (b<<s); |
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} |
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return b - (a<b*b); |
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} |
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#if ARCH_X86 |
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#define MASK_ABS(mask, level)\ |
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__asm__ volatile(\ |
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"cltd \n\t"\ |
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"xorl %1, %0 \n\t"\ |
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"subl %1, %0 \n\t"\ |
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: "+a" (level), "=&d" (mask)\ |
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); |
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#else |
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#define MASK_ABS(mask, level)\ |
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mask= level>>31;\ |
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level= (level^mask)-mask; |
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#endif |
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#if HAVE_CMOV |
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#define COPY3_IF_LT(x,y,a,b,c,d)\ |
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__asm__ volatile (\ |
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"cmpl %0, %3 \n\t"\ |
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"cmovl %3, %0 \n\t"\ |
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"cmovl %4, %1 \n\t"\ |
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"cmovl %5, %2 \n\t"\ |
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: "+&r" (x), "+&r" (a), "+r" (c)\ |
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: "r" (y), "r" (b), "r" (d)\ |
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); |
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#else |
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#define COPY3_IF_LT(x,y,a,b,c,d)\ |
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if((y)<(x)){\ |
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(x)=(y);\ |
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(a)=(b);\ |
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(c)=(d);\ |
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} |
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#endif |
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/* avoid usage of dangerous/inappropriate system functions */ |
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#undef malloc |
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#define malloc please_use_av_malloc |
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#undef free |
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#define free please_use_av_free |
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#undef realloc |
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#define realloc please_use_av_realloc |
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#undef time |
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#define time time_is_forbidden_due_to_security_issues |
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#undef rand |
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#define rand rand_is_forbidden_due_to_state_trashing_use_av_random |
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#undef srand |
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#define srand srand_is_forbidden_due_to_state_trashing_use_av_random_init |
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#undef random |
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#define random random_is_forbidden_due_to_state_trashing_use_av_random |
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#undef sprintf |
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#define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf |
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#undef strcat |
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#define strcat strcat_is_forbidden_due_to_security_issues_use_av_strlcat |
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#undef exit |
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#define exit exit_is_forbidden |
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#ifndef LIBAVFORMAT_BUILD |
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#undef printf |
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#define printf please_use_av_log_instead_of_printf |
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#undef fprintf |
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#define fprintf please_use_av_log_instead_of_fprintf |
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#undef puts |
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#define puts please_use_av_log_instead_of_puts |
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#undef perror |
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#define perror please_use_av_log_instead_of_perror |
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#endif |
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#define CHECKED_ALLOCZ(p, size)\ |
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{\ |
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p= av_mallocz(size);\ |
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if(p==NULL && (size)!=0){\ |
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av_log(NULL, AV_LOG_ERROR, "Cannot allocate memory.");\ |
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goto fail;\ |
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}\ |
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} |
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#if defined(__ICC) || defined(__SUNPRO_C) |
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#define DECLARE_ALIGNED(n,t,v) t v __attribute__ ((aligned (n))) |
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#define DECLARE_ASM_CONST(n,t,v) const t __attribute__ ((aligned (n))) v |
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#elif defined(__GNUC__) |
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#define DECLARE_ALIGNED(n,t,v) t v __attribute__ ((aligned (n))) |
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#define DECLARE_ASM_CONST(n,t,v) static const t v attribute_used __attribute__ ((aligned (n))) |
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#elif defined(_MSC_VER) |
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#define DECLARE_ALIGNED(n,t,v) __declspec(align(n)) t v |
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#define DECLARE_ASM_CONST(n,t,v) __declspec(align(n)) static const t v |
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#elif HAVE_INLINE_ASM |
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#error The asm code needs alignment, but we do not know how to do it for this compiler. |
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#else |
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#define DECLARE_ALIGNED(n,t,v) t v |
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#define DECLARE_ASM_CONST(n,t,v) static const t v |
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#endif |
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#if !HAVE_LLRINT |
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static av_always_inline av_const long long llrint(double x) |
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{ |
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return rint(x); |
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} |
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#endif /* HAVE_LLRINT */ |
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#if !HAVE_LRINT |
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static av_always_inline av_const long int lrint(double x) |
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{ |
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return rint(x); |
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} |
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#endif /* HAVE_LRINT */ |
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#if !HAVE_LRINTF |
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static av_always_inline av_const long int lrintf(float x) |
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{ |
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return (int)(rint(x)); |
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} |
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#endif /* HAVE_LRINTF */ |
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#if !HAVE_ROUND |
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static av_always_inline av_const double round(double x) |
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{ |
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return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5); |
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} |
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#endif /* HAVE_ROUND */ |
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#if !HAVE_ROUNDF |
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static av_always_inline av_const float roundf(float x) |
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{ |
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return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5); |
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} |
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#endif /* HAVE_ROUNDF */ |
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#if !HAVE_TRUNCF |
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static av_always_inline av_const float truncf(float x) |
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{ |
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return (x > 0) ? floor(x) : ceil(x); |
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} |
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#endif /* HAVE_TRUNCF */ |
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/** |
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* Returns NULL if CONFIG_SMALL is true, otherwise the argument |
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* without modification. Used to disable the definition of strings |
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* (for example AVCodec long_names). |
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*/ |
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#if CONFIG_SMALL |
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# define NULL_IF_CONFIG_SMALL(x) NULL |
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#else |
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# define NULL_IF_CONFIG_SMALL(x) x |
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#endif |
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#endif /* AVUTIL_INTERNAL_H */
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