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