/* * 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 > 1110) && 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 to export labels from asm. */ #define LABEL_MANGLE(a) EXTERN_PREFIX #a // 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[257]; #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 && HAVE_INLINE_ASM 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 && HAVE_INLINE_ASM 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 << s); } return b - (a < b * b); } #if ARCH_X86 #define MASK_ABS(mask, level)\ __asm__ volatile(\ "cltd \n\t"\ "xorl %1, %0 \n\t"\ "subl %1, %0 \n\t"\ : "+a" (level), "=&d" (mask)\ ); #else #define MASK_ABS(mask, level)\ mask = level >> 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_lfg_get #undef srand #define srand srand_is_forbidden_due_to_state_trashing_use_av_lfg_init #undef random #define random random_is_forbidden_due_to_state_trashing_use_av_lfg_get #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 FF_ALLOC_OR_GOTO(ctx, p, size, label)\ {\ p = av_malloc(size);\ if (p == NULL && (size) != 0) {\ av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\ goto label;\ }\ } #define FF_ALLOCZ_OR_GOTO(ctx, p, size, label)\ {\ p = av_mallocz(size);\ if (p == NULL && (size) != 0) {\ av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\ goto label;\ }\ } #if !HAVE_LLRINT static av_always_inline av_const long long llrint(double x) { return rint(x); } #endif /* HAVE_LLRINT */ #if !HAVE_LOG2 static av_always_inline av_const double log2(double x) { return log(x) * 1.44269504088896340736; } #endif /* HAVE_LOG2 */ #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 */