26#ifndef AVUTIL_COMMON_H
27#define AVUTIL_COMMON_H
29#if defined(__cplusplus) && !defined(__STDC_CONSTANT_MACROS) && !defined(UINT64_C)
30#error missing -D__STDC_CONSTANT_MACROS / #define __STDC_CONSTANT_MACROS
47#ifdef HAVE_AV_CONFIG_H
56#define RSHIFT(a,b) ((a) > 0 ? ((a) + ((1<<(b))>>1))>>(b) : ((a) + ((1<<(b))>>1)-1)>>(b))
58#define ROUNDED_DIV(a,b) (((a)>=0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))
60#define AV_CEIL_RSHIFT(a,b) (!av_builtin_constant_p(b) ? -((-(a)) >> (b)) \
61 : ((a) + (1<<(b)) - 1) >> (b))
63#define FF_CEIL_RSHIFT AV_CEIL_RSHIFT
65#define FFUDIV(a,b) (((a)>0 ?(a):(a)-(b)+1) / (b))
66#define FFUMOD(a,b) ((a)-(b)*FFUDIV(a,b))
74#define FFABS(a) ((a) >= 0 ? (a) : (-(a)))
75#define FFSIGN(a) ((a) > 0 ? 1 : -1)
83#define FFNABS(a) ((a) <= 0 ? (a) : (-(a)))
91#define FFABSU(a) ((a) <= 0 ? -(unsigned)(a) : (unsigned)(a))
92#define FFABS64U(a) ((a) <= 0 ? -(uint64_t)(a) : (uint64_t)(a))
97# define av_ceil_log2 av_ceil_log2_c
100# define av_clip av_clip_c
103# define av_clip64 av_clip64_c
106# define av_clip_uint8 av_clip_uint8_c
109# define av_clip_int8 av_clip_int8_c
111#ifndef av_clip_uint16
112# define av_clip_uint16 av_clip_uint16_c
115# define av_clip_int16 av_clip_int16_c
117#ifndef av_clipl_int32
118# define av_clipl_int32 av_clipl_int32_c
121# define av_clip_intp2 av_clip_intp2_c
123#ifndef av_clip_uintp2
124# define av_clip_uintp2 av_clip_uintp2_c
127# define av_sat_add32 av_sat_add32_c
130# define av_sat_dadd32 av_sat_dadd32_c
133# define av_sat_sub32 av_sat_sub32_c
136# define av_sat_dsub32 av_sat_dsub32_c
139# define av_sat_add64 av_sat_add64_c
142# define av_sat_sub64 av_sat_sub64_c
145# define av_clipf av_clipf_c
148# define av_clipd av_clipd_c
150#ifndef av_zero_extend
151# define av_zero_extend av_zero_extend_c
154# define av_popcount av_popcount_c
157# define av_popcount64 av_popcount64_c
160# define av_parity av_parity_c
180#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
181 if (amin > amax) abort();
183 if (a < amin)
return amin;
184 else if (a > amax)
return amax;
197#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
198 if (amin > amax) abort();
200 if (a < amin)
return amin;
201 else if (a > amax)
return amax;
212 if (a&(~0xFF))
return (~a)>>31;
223 if ((a+0x80U) & ~0xFF)
return (a>>31) ^ 0x7F;
234 if (a&(~0xFFFF))
return (~a)>>31;
245 if ((a+0x8000U) & ~0xFFFF)
return (a>>31) ^ 0x7FFF;
256 if ((a+UINT64_C(0x80000000)) & ~UINT64_C(0xFFFFFFFF))
return (int32_t)((a>>63) ^ 0x7FFFFFFF);
257 else return (int32_t)a;
268 if (((
unsigned)a + (1U << p)) & ~((2U << p) - 1))
269 return (a >> 31) ^ ((1 << p) - 1);
282 if (a & ~((1U<<p) - 1))
return (~a) >> 31 & ((1U<<p) - 1);
294#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
297 return a & ((1U << p) - 1);
302# define av_mod_uintp2 av_mod_uintp2_c
367#if (!defined(__INTEL_COMPILER) && AV_GCC_VERSION_AT_LEAST(5,1)) || AV_HAS_BUILTIN(__builtin_add_overflow)
369 return !__builtin_add_overflow(a, b, &tmp) ? tmp : (tmp < 0 ? INT64_MAX : INT64_MIN);
371 int64_t s = a+(uint64_t)b;
372 if ((int64_t)(a^b | ~s^b) >= 0)
373 return INT64_MAX ^ (b >> 63);
386#if (!defined(__INTEL_COMPILER) && AV_GCC_VERSION_AT_LEAST(5,1)) || AV_HAS_BUILTIN(__builtin_sub_overflow)
388 return !__builtin_sub_overflow(a, b, &tmp) ? tmp : (tmp < 0 ? INT64_MAX : INT64_MIN);
390 if (b <= 0 && a >= INT64_MAX + b)
392 if (b >= 0 && a <= INT64_MIN + b)
409#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
410 if (amin > amax) abort();
426#if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
427 if (amin > amax) abort();
448 x -= (x >> 1) & 0x55555555;
449 x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
450 x = (x + (x >> 4)) & 0x0F0F0F0F;
452 return (x + (x >> 16)) & 0x3F;
488#define GET_UTF8(val, GET_BYTE, ERROR)\
491 uint32_t top = (val & 128) >> 1;\
492 if ((val & 0xc0) == 0x80 || val >= 0xFE)\
495 unsigned int tmp = (GET_BYTE) - 128;\
498 val= (val<<6) + tmp;\
501 val &= (top << 1) - 1;\
513#define GET_UTF16(val, GET_16BIT, ERROR)\
516 unsigned int hi = val - 0xD800;\
518 val = (GET_16BIT) - 0xDC00;\
519 if (val > 0x3FFU || hi > 0x3FFU)\
521 val += (hi<<10) + 0x10000;\
541#define PUT_UTF8(val, tmp, PUT_BYTE)\
549 bytes = (av_log2(in) + 4) / 5;\
550 shift = (bytes - 1) * 6;\
551 tmp = (256 - (256 >> bytes)) | (in >> shift);\
553 while (shift >= 6) {\
555 tmp = 0x80 | ((in >> shift) & 0x3f);\
575#define PUT_UTF16(val, tmp, PUT_16BIT)\
582 tmp = 0xD800 | ((in - 0x10000) >> 10);\
584 tmp = 0xDC00 | ((in - 0x10000) & 0x3FF);\
Macro definitions for various function/variable attributes.
#define attribute_deprecated
static av_always_inline int64_t av_sat_sub64_c(int64_t a, int64_t b)
Subtract two signed 64-bit values with saturation.
static av_always_inline av_const int av_popcount64_c(uint64_t x)
Count number of bits set to one in x.
av_const int av_log2(unsigned v)
static av_always_inline int av_sat_add32_c(int a, int b)
Add two signed 32-bit values with saturation.
static av_always_inline av_const int8_t av_clip_int8_c(int a)
Clip a signed integer value into the -128,127 range.
static av_always_inline av_const int av_clip_c(int a, int amin, int amax)
Clip a signed integer value into the amin-amax range.
static av_always_inline int av_sat_dsub32_c(int a, int b)
Subtract a doubled value from another value with saturation at both stages.
static av_always_inline av_const uint16_t av_clip_uint16_c(int a)
Clip a signed integer value into the 0-65535 range.
static av_always_inline av_const int av_popcount_c(uint32_t x)
Count number of bits set to one in x.
static av_always_inline int av_sat_sub32_c(int a, int b)
Subtract two signed 32-bit values with saturation.
static av_always_inline av_const float av_clipf_c(float a, float amin, float amax)
Clip a float value into the amin-amax range.
static av_always_inline int64_t av_sat_add64_c(int64_t a, int64_t b)
Add two signed 64-bit values with saturation.
static av_always_inline av_const unsigned av_clip_uintp2_c(int a, int p)
Clip a signed integer to an unsigned power of two range.
av_const int av_log2_16bit(unsigned v)
static av_always_inline av_const uint8_t av_clip_uint8_c(int a)
Clip a signed integer value into the 0-255 range.
static av_always_inline av_const double av_clipd_c(double a, double amin, double amax)
Clip a double value into the amin-amax range.
static av_always_inline av_const int64_t av_clip64_c(int64_t a, int64_t amin, int64_t amax)
Clip a signed 64bit integer value into the amin-amax range.
static av_always_inline av_const int16_t av_clip_int16_c(int a)
Clip a signed integer value into the -32768,32767 range.
static av_always_inline av_const int av_clip_intp2_c(int a, int p)
Clip a signed integer into the -(2^p),(2^p-1) range.
static av_always_inline av_const unsigned av_zero_extend_c(unsigned a, unsigned p)
Clear high bits from an unsigned integer starting with specific bit position.
static av_always_inline av_const int av_ceil_log2_c(int x)
Compute ceil(log2(x)).
static av_always_inline av_const int32_t av_clipl_int32_c(int64_t a)
Clip a signed 64-bit integer value into the -2147483648,2147483647 range.
static av_always_inline av_const int av_parity_c(uint32_t v)
static av_always_inline int av_sat_dadd32_c(int a, int b)
Add a doubled value to another value with saturation at both stages.
Utility Preprocessor macros.
Memory handling functions.