26 #ifndef AVUTIL_COMMON_H 27 #define AVUTIL_COMMON_H 44 # define AV_NE(be, le) (be) 46 # define AV_NE(be, le) (le) 50 #define RSHIFT(a,b) ((a) > 0 ? ((a) + ((1<<(b))>>1))>>(b) : ((a) + ((1<<(b))>>1)-1)>>(b)) 52 #define ROUNDED_DIV(a,b) (((a)>0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b)) 57 #define AV_CEIL_RSHIFT(a, b) \ 58 (av_builtin_constant_p(b) ? ((a) + (1 << (b)) - 1) >> (b) \ 61 #define FFABS(a) ((a) >= 0 ? (a) : (-(a))) 62 #define FFSIGN(a) ((a) > 0 ? 1 : -1) 64 #define FFMAX(a,b) ((a) > (b) ? (a) : (b)) 65 #define FFMAX3(a,b,c) FFMAX(FFMAX(a,b),c) 66 #define FFMIN(a,b) ((a) > (b) ? (b) : (a)) 67 #define FFMIN3(a,b,c) FFMIN(FFMIN(a,b),c) 69 #define FFSWAP(type,a,b) do{type SWAP_tmp= b; b= a; a= SWAP_tmp;}while(0) 70 #define FF_ARRAY_ELEMS(a) (sizeof(a) / sizeof((a)[0])) 74 #ifdef HAVE_AV_CONFIG_H 99 if (a < amin)
return amin;
100 else if (a > amax)
return amax;
111 if (a&(~0xFF))
return (-a)>>31;
122 if ((a+0x80) & ~0xFF)
return (a>>31) ^ 0x7F;
133 if (a&(~0xFFFF))
return (-a)>>31;
144 if ((a+0x8000) & ~0xFFFF)
return (a>>31) ^ 0x7FFF;
155 if ((a+0x80000000u) & ~UINT64_C(0xFFFFFFFF))
return (a>>63) ^ 0x7FFFFFFF;
167 if ((a + (1 << p)) & ~((1 << (p + 1)) - 1))
168 return (a >> 31) ^ ((1 << p) - 1);
181 if (a & ~((1<<p) - 1))
return -a >> 31 & ((1<<p) - 1);
194 return av_clipl_int32((int64_t)a + b);
206 return av_sat_add32(a, av_sat_add32(b, b));
218 if (a < amin)
return amin;
219 else if (a > amax)
return amax;
239 x -= (x >> 1) & 0x55555555;
240 x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
241 x = (x + (x >> 4)) & 0x0F0F0F0F;
243 return (x + (x >> 16)) & 0x3F;
253 return av_popcount(x) + av_popcount(x >> 32);
256 #define MKTAG(a,b,c,d) ((a) | ((b) << 8) | ((c) << 16) | ((unsigned)(d) << 24)) 257 #define MKBETAG(a,b,c,d) ((d) | ((c) << 8) | ((b) << 16) | ((unsigned)(a) << 24)) 270 #define GET_UTF8(val, GET_BYTE, ERROR)\ 273 uint32_t top = (val & 128) >> 1;\ 274 if ((val & 0xc0) == 0x80)\ 277 int tmp= GET_BYTE - 128;\ 280 val= (val<<6) + tmp;\ 283 val &= (top << 1) - 1;\ 295 #define GET_UTF16(val, GET_16BIT, ERROR)\ 298 unsigned int hi = val - 0xD800;\ 300 val = GET_16BIT - 0xDC00;\ 301 if (val > 0x3FFU || hi > 0x3FFU)\ 303 val += (hi<<10) + 0x10000;\ 323 #define PUT_UTF8(val, tmp, PUT_BYTE)\ 331 bytes = (av_log2(in) + 4) / 5;\ 332 shift = (bytes - 1) * 6;\ 333 tmp = (256 - (256 >> bytes)) | (in >> shift);\ 335 while (shift >= 6) {\ 337 tmp = 0x80 | ((in >> shift) & 0x3f);\ 357 #define PUT_UTF16(val, tmp, PUT_16BIT)\ 364 tmp = 0xD800 | ((in - 0x10000) >> 10);\ 366 tmp = 0xDC00 | ((in - 0x10000) & 0x3FF);\ 375 #ifdef HAVE_AV_CONFIG_H 376 # include "internal.h" 387 # define av_ceil_log2 av_ceil_log2_c 390 # define av_clip av_clip_c 392 #ifndef av_clip_uint8 393 # define av_clip_uint8 av_clip_uint8_c 396 # define av_clip_int8 av_clip_int8_c 398 #ifndef av_clip_uint16 399 # define av_clip_uint16 av_clip_uint16_c 401 #ifndef av_clip_int16 402 # define av_clip_int16 av_clip_int16_c 404 #ifndef av_clipl_int32 405 # define av_clipl_int32 av_clipl_int32_c 407 #ifndef av_clip_intp2 408 # define av_clip_intp2 av_clip_intp2_c 410 #ifndef av_clip_uintp2 411 # define av_clip_uintp2 av_clip_uintp2_c 414 # define av_sat_add32 av_sat_add32_c 416 #ifndef av_sat_dadd32 417 # define av_sat_dadd32 av_sat_dadd32_c 420 # define av_clipf av_clipf_c 423 # define av_popcount av_popcount_c 425 #ifndef av_popcount64 426 # define av_popcount64 av_popcount64_c
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 float av_clipf_c(float a, float amin, float amax)
Clip a float value into the amin-amax range.
memory handling functions
static av_always_inline av_const int8_t av_clip_int8_c(int a)
Clip a signed integer value into the -128,127 range.
av_const int av_log2_16bit(unsigned v)
Macro definitions for various function/variable attributes.
Utility Preprocessor macros.
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.
Libavutil version macros.
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 uint8_t av_clip_uint8_c(int a)
Clip a signed integer value into the 0-255 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.
av_const int av_log2(unsigned v)
static av_always_inline av_const int16_t av_clip_int16_c(int a)
Clip a signed integer value into the -32768,32767 range.
common internal and external API header
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_add32_c(int a, int b)
Add two signed 32-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.
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.
static av_always_inline av_const int av_ceil_log2_c(int x)
Compute ceil(log2(x)).
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.