X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavutil%2Finternal.h;h=a41a94636f10dde457d1877380416e8a08c06f2e;hb=3344cf851c55d80080ec8f47bb1637200619ed5f;hp=e2316e647a87acffb668d1c2676979a661058c64;hpb=635eb0cc3d65b074e03c8dd608345f96631c459f;p=ffmpeg

diff --git a/libavutil/internal.h b/libavutil/internal.h
index e2316e647a8..a41a94636f1 100644
--- a/libavutil/internal.h
+++ b/libavutil/internal.h
@@ -19,145 +19,172 @@
  */
 
 /**
- * @file internal.h
- * common internal api header.
+ * @file libavutil/internal.h
+ * common internal API header
  */
 
-#ifndef INTERNAL_H
-#define INTERNAL_H
+#ifndef AVUTIL_INTERNAL_H
+#define AVUTIL_INTERNAL_H
 
-#if ( defined(__PIC__) || defined(__pic__) ) && ! defined(PIC)
-#    define PIC
+#if !defined(DEBUG) && !defined(NDEBUG)
+#    define NDEBUG
+#endif
+
+#include <limits.h>
+#include <stdint.h>
+#include <stddef.h>
+#include <assert.h>
+#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 ENODATA
-#    define ENODATA  61
+#ifndef attribute_used
+#if AV_GCC_VERSION_AT_LEAST(3,1)
+#    define attribute_used __attribute__((used))
+#else
+#    define attribute_used
+#endif
 #endif
 
-#include "bswap.h"
+#ifndef INT16_MIN
+#define INT16_MIN       (-0x7fff-1)
+#endif
 
-#include <stddef.h>
-#ifndef offsetof
-#    define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F))
+#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
 
-#ifdef __MINGW32__
-#    ifdef _DEBUG
-#        define DEBUG
-#    endif
+#ifndef UINT32_MAX
+#define UINT32_MAX      0xffffffff
+#endif
 
-#    define snprintf _snprintf
-#    define vsnprintf _vsnprintf
+#ifndef INT64_MIN
+#define INT64_MIN       (-0x7fffffffffffffffLL-1)
+#endif
 
-#    ifdef CONFIG_WINCE
-#        define perror(a)
-#    endif
+#ifndef INT64_MAX
+#define INT64_MAX INT64_C(9223372036854775807)
+#endif
 
-/* __MINGW32__ end */
-#elif defined (CONFIG_OS2)
-/* OS/2 EMX */
+#ifndef UINT64_MAX
+#define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF)
+#endif
 
-#    include <float.h>
+#ifndef INT_BIT
+#    define INT_BIT (CHAR_BIT * sizeof(int))
+#endif
 
-#endif /* !__MINGW32__ && CONFIG_OS2 */
+#if ( defined(__PIC__) || defined(__pic__) ) && ! defined(PIC)
+#    define PIC
+#endif
 
-#ifdef USE_FASTMEMCPY
-#    include "libvo/fastmemcpy.h"
+#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 defined(__MINGW32__) || defined(__CYGWIN__) || \
-    defined(__OS2__) || (defined (__OpenBSD__) && !defined(__ELF__))
-#    if defined(ARCH_X86_64) && defined(PIC)
-#        define MANGLE(a) "_" #a"(%%rip)"
-#    else
-#        define MANGLE(a) "_" #a
-#    endif
+#if ARCH_X86_64 && defined(PIC)
+#    define LOCAL_MANGLE(a) #a "(%%rip)"
 #else
-#    if defined(ARCH_X86_64) && defined(PIC)
-#        define MANGLE(a) #a"(%%rip)"
-#    elif defined(CONFIG_DARWIN)
-#        define MANGLE(a) "_" #a
-#    else
-#        define MANGLE(a) #a
-#    endif
+#    define LOCAL_MANGLE(a) #a
 #endif
 
-/* debug stuff */
+#define MANGLE(a) EXTERN_PREFIX LOCAL_MANGLE(a)
 
-#if !defined(DEBUG) && !defined(NDEBUG)
-#    define NDEBUG
-#endif
-#include <assert.h>
+/* debug stuff */
 
 /* dprintf macros */
 #ifdef DEBUG
-#    define dprintf(fmt,...) av_log(NULL, AV_LOG_DEBUG, fmt, __VA_ARGS__)
+#    define dprintf(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__)
 #else
-#    define dprintf(fmt,...)
-#endif
-
-#ifdef CONFIG_WINCE
-#    define abort()
+#    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 defined(ARCH_X86)
+#if ARCH_X86
 #    define FASTDIV(a,b) \
     ({\
         int ret,dmy;\
-        asm volatile(\
+        __asm__ volatile(\
             "mull %3"\
             :"=d"(ret),"=a"(dmy)\
             :"1"(a),"g"(ff_inverse[b])\
             );\
         ret;\
     })
-#elif defined(ARCH_ARMV4L)
-#    define FASTDIV(a,b) \
-    ({\
-        int ret,dmy;\
-        asm volatile(\
-            "umull %1, %0, %2, %3"\
-            :"=&r"(ret),"=&r"(dmy)\
-            :"r"(a),"r"(ff_inverse[b])\
-            );\
-        ret;\
-    })
-#elif defined(CONFIG_FASTDIV)
+#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
 
-/* math */
-extern FF_IMPORT_ATTR const uint8_t ff_sqrt_tab[128];
+extern const uint8_t ff_sqrt_tab[256];
 
-static inline int ff_sqrt(int a)
+static inline av_const unsigned int ff_sqrt(unsigned int a)
 {
-    int ret=0;
-    int s;
-    int ret_sq=0;
-
-    if(a<128) return ff_sqrt_tab[a];
-
-    for(s=15; s>=0; s--){
-        int b= ret_sq + (1<<(s*2)) + (ret<<s)*2;
-        if(b<=a){
-            ret_sq=b;
-            ret+= 1<<s;
-        }
+    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 ret;
+
+    return b - (a<b*b);
 }
 
-#if defined(ARCH_X86)
+#if ARCH_X86
 #define MASK_ABS(mask, level)\
-            asm volatile(\
-                "cdq                    \n\t"\
+            __asm__ volatile(\
+                "cltd                   \n\t"\
                 "xorl %1, %0            \n\t"\
                 "subl %1, %0            \n\t"\
                 : "+a" (level), "=&d" (mask)\
@@ -168,14 +195,14 @@ static inline int ff_sqrt(int a)
             level= (level^mask)-mask;
 #endif
 
-#ifdef HAVE_CMOV
+#if HAVE_CMOV
 #define COPY3_IF_LT(x,y,a,b,c,d)\
-asm volatile (\
+__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" (x), "+&r" (a), "+r" (c)\
     : "r" (y), "r" (b), "r" (d)\
 );
 #else
@@ -187,51 +214,115 @@ if((y)<(x)){\
 }
 #endif
 
-/* avoid usage of various functions */
+/* 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
-#define rand rand_is_forbidden_due_to_state_trashing
-#define srand srand_is_forbidden_due_to_state_trashing
+#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
-#define strcat strcat_is_forbidden_due_to_security_issues_use_pstrcat
-#if !(defined(LIBAVFORMAT_BUILD) || defined(_FRAMEHOOK_H))
-#define printf please_use_av_log
-#define fprintf please_use_av_log
+#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){\
-        perror("malloc");\
+        av_log(NULL, AV_LOG_ERROR, "Cannot allocate memory.");\
         goto fail;\
     }\
 }
 
-#ifndef HAVE_LRINTF
-/* XXX: add ISOC specific test to avoid specific BSD testing. */
-/* better than nothing implementation. */
-/* btw, rintf() is existing on fbsd too -- alex */
-static always_inline long int lrintf(float x)
-{
-#ifdef __MINGW32__
-#  ifdef ARCH_X86_32
-    int32_t i;
-    asm volatile(
-        "fistpl %0\n\t"
-        : "=m" (i) : "t" (x) : "st"
-    );
-    return i;
-#  else
-    /* XXX: incorrect, but make it compile */
-    return (int)(x + (x < 0 ? -0.5 : 0.5));
-#  endif /* ARCH_X86_32 */
+#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 /* __MINGW32__ */
 }
 #endif /* HAVE_LRINTF */
 
-#endif /* INTERNAL_H */
+#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 */