X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavutil%2Finternal.h;h=ae678d584082c2ffa1c4c53083eab967b47228c2;hb=c18365402bbb6fbfa7854b47c3288f9e31f39f44;hp=a41a94636f10dde457d1877380416e8a08c06f2e;hpb=9f5da4d189e283a6ec0b1809357a9ee9a2f8c2e1;p=ffmpeg diff --git a/libavutil/internal.h b/libavutil/internal.h index a41a94636f1..ae678d58408 100644 --- a/libavutil/internal.h +++ b/libavutil/internal.h @@ -1,25 +1,25 @@ /* * copyright (c) 2006 Michael Niedermayer * - * This file is part of FFmpeg. + * This file is part of Libav. * - * FFmpeg is free software; you can redistribute it and/or + * Libav 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, + * Libav 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 + * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** - * @file libavutil/internal.h + * @file * common internal API header */ @@ -35,28 +35,25 @@ #include #include #include "config.h" -#include "common.h" -#include "mem.h" +#include "attributes.h" #include "timer.h" +#include "dict.h" + +struct AVDictionary { + int count; + AVDictionaryEntry *elems; +}; #ifndef attribute_align_arg -#if (!defined(__ICC) || __ICC > 1100) && AV_GCC_VERSION_AT_LEAST(4,2) +#if ARCH_X86_32 && 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) +#define INT16_MIN (-0x7fff - 1) #endif #ifndef INT16_MAX @@ -64,7 +61,7 @@ #endif #ifndef INT32_MIN -#define INT32_MIN (-0x7fffffff-1) +#define INT32_MIN (-0x7fffffff - 1) #endif #ifndef INT32_MAX @@ -76,7 +73,7 @@ #endif #ifndef INT64_MIN -#define INT64_MIN (-0x7fffffffffffffffLL-1) +#define INT64_MIN (-0x7fffffffffffffffLL - 1) #endif #ifndef INT64_MAX @@ -91,14 +88,13 @@ # 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)) +# 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)" @@ -110,77 +106,10 @@ /* 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 && 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<>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);\ -} + mask = level >> 31;\ + level = (level ^ mask) - mask; #endif /* avoid usage of dangerous/inappropriate system functions */ @@ -233,9 +143,10 @@ if((y)<(x)){\ #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 strncpy +#define strncpy strncpy_is_forbidden_due_to_security_issues_use_av_strlcpy #undef exit #define exit exit_is_forbidden -#ifndef LIBAVFORMAT_BUILD #undef printf #define printf please_use_av_log_instead_of_printf #undef fprintf @@ -244,78 +155,33 @@ if((y)<(x)){\ #define puts please_use_av_log_instead_of_puts #undef perror #define perror please_use_av_log_instead_of_perror -#endif +#undef strcasecmp +#define strcasecmp please_use_av_strcasecmp +#undef strncasecmp +#define strncasecmp please_use_av_strncasecmp -#define CHECKED_ALLOCZ(p, size)\ +#define FF_ALLOC_OR_GOTO(ctx, p, size, label)\ {\ - p= av_mallocz(size);\ - if(p==NULL && (size)!=0){\ - av_log(NULL, AV_LOG_ERROR, "Cannot allocate memory.");\ - goto fail;\ + p = av_malloc(size);\ + if (p == NULL && (size) != 0) {\ + av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\ + goto label;\ }\ } -#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); +#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;\ + }\ } -#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 */ +#include "libm.h" /** - * Returns NULL if CONFIG_SMALL is true, otherwise the argument + * Return NULL if CONFIG_SMALL is true, otherwise the argument * without modification. Used to disable the definition of strings * (for example AVCodec long_names). */ @@ -325,4 +191,58 @@ static av_always_inline av_const float truncf(float x) # define NULL_IF_CONFIG_SMALL(x) x #endif + +/** + * Define a function with only the non-default version specified. + * + * On systems with ELF shared libraries, all symbols exported from + * Libav libraries are tagged with the name and major version of the + * library to which they belong. If a function is moved from one + * library to another, a wrapper must be retained in the original + * location to preserve binary compatibility. + * + * Functions defined with this macro will never be used to resolve + * symbols by the build-time linker. + * + * @param type return type of function + * @param name name of function + * @param args argument list of function + * @param ver version tag to assign function + */ +#if HAVE_SYMVER_ASM_LABEL +# define FF_SYMVER(type, name, args, ver) \ + type ff_##name args __asm__ (EXTERN_PREFIX #name "@" ver); \ + type ff_##name args +#elif HAVE_SYMVER_GNU_ASM +# define FF_SYMVER(type, name, args, ver) \ + __asm__ (".symver ff_" #name "," EXTERN_PREFIX #name "@" ver); \ + type ff_##name args; \ + type ff_##name args +#endif + +/** + * Return NULL if a threading library has not been enabled. + * Used to disable threading functions in AVCodec definitions + * when not needed. + */ +#if HAVE_THREADS +# define ONLY_IF_THREADS_ENABLED(x) x +#else +# define ONLY_IF_THREADS_ENABLED(x) NULL +#endif + +#if HAVE_MMX +/** + * Empty mmx state. + * this must be called between any dsp function and float/double code. + * for example sin(); dsp->idct_put(); emms_c(); cos() + */ +static av_always_inline void emms_c(void) +{ + __asm__ volatile ("emms" ::: "memory"); +} +#else /* HAVE_MMX */ +#define emms_c() +#endif /* HAVE_MMX */ + #endif /* AVUTIL_INTERNAL_H */