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
45 #include "libavutil/avconfig.h"
48 # define AV_NE(be, le) (be)
50 # define AV_NE(be, le) (le)
54 #define RSHIFT(a,b) ((a) > 0 ? ((a) + ((1<<(b))>>1))>>(b) : ((a) + ((1<<(b))>>1)-1)>>(b))
56 #define ROUNDED_DIV(a,b) (((a)>0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))
58 #define AV_CEIL_RSHIFT(a,b) (!av_builtin_constant_p(b) ? -((-(a)) >> (b)) \
59 : ((a) + (1<<(b)) - 1) >> (b))
61 #define FF_CEIL_RSHIFT AV_CEIL_RSHIFT
63 #define FFUDIV(a,b) (((a)>0 ?(a):(a)-(b)+1) / (b))
64 #define FFUMOD(a,b) ((a)-(b)*FFUDIV(a,b))
72 #define FFABS(a) ((a) >= 0 ? (a) : (-(a)))
73 #define FFSIGN(a) ((a) > 0 ? 1 : -1)
81 #define FFNABS(a) ((a) <= 0 ? (a) : (-(a)))
92 #define FFDIFFSIGN(x,y) (((x)>(y)) - ((x)<(y)))
94 #define FFMAX(a,b) ((a) > (b) ? (a) : (b))
95 #define FFMAX3(a,b,c) FFMAX(FFMAX(a,b),c)
96 #define FFMIN(a,b) ((a) > (b) ? (b) : (a))
97 #define FFMIN3(a,b,c) FFMIN(FFMIN(a,b),c)
99 #define FFSWAP(type,a,b) do{type SWAP_tmp= b; b= a; a= SWAP_tmp;}while(0)
100 #define FF_ARRAY_ELEMS(a) (sizeof(a) / sizeof((a)[0]))
104 #ifdef HAVE_AV_CONFIG_H
116 #ifndef av_log2_16bit
129 #if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
130 if (amin > amax) abort();
132 if (a < amin)
return amin;
133 else if (a > amax)
return amax;
146 #if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
147 if (amin > amax) abort();
149 if (a < amin)
return amin;
150 else if (a > amax)
return amax;
161 if (a&(~0xFF))
return (-a)>>31;
172 if ((a+0x80U) & ~0xFF)
return (a>>31) ^ 0x7F;
183 if (a&(~0xFFFF))
return (-a)>>31;
194 if ((a+0x8000U) & ~0xFFFF)
return (a>>31) ^ 0x7FFF;
205 if ((a+0x80000000u) & ~UINT64_C(0xFFFFFFFF))
return (
int32_t)((a>>63) ^ 0x7FFFFFFF);
217 if (((
unsigned)a + (1 << p)) & ~((2 << p) - 1))
218 return (a >> 31) ^ ((1 << p) - 1);
231 if (a & ~((1<<p) - 1))
return -a >> 31 & ((1<<p) - 1);
243 return a & ((1 << p) - 1);
255 return av_clipl_int32((int64_t)a + b);
267 return av_sat_add32(a, av_sat_add32(b, b));
279 #if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
280 if (amin > amax) abort();
282 if (a < amin)
return amin;
283 else if (a > amax)
return amax;
296 #if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
297 if (amin > amax) abort();
299 if (a < amin)
return amin;
300 else if (a > amax)
return amax;
320 x -= (x >> 1) & 0x55555555;
321 x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
322 x = (x + (x >> 4)) & 0x0F0F0F0F;
324 return (x + (x >> 16)) & 0x3F;
334 return av_popcount((uint32_t)x) + av_popcount((uint32_t)(x >> 32));
339 return av_popcount(v) & 1;
342 #define MKTAG(a,b,c,d) ((a) | ((b) << 8) | ((c) << 16) | ((unsigned)(d) << 24))
343 #define MKBETAG(a,b,c,d) ((d) | ((c) << 8) | ((b) << 16) | ((unsigned)(a) << 24))
361 #define GET_UTF8(val, GET_BYTE, ERROR)\
364 uint32_t top = (val & 128) >> 1;\
365 if ((val & 0xc0) == 0x80 || val >= 0xFE)\
368 int tmp= (GET_BYTE) - 128;\
371 val= (val<<6) + tmp;\
374 val &= (top << 1) - 1;\
386 #define GET_UTF16(val, GET_16BIT, ERROR)\
389 unsigned int hi = val - 0xD800;\
391 val = GET_16BIT - 0xDC00;\
392 if (val > 0x3FFU || hi > 0x3FFU)\
394 val += (hi<<10) + 0x10000;\
414 #define PUT_UTF8(val, tmp, PUT_BYTE)\
422 bytes = (av_log2(in) + 4) / 5;\
423 shift = (bytes - 1) * 6;\
424 tmp = (256 - (256 >> bytes)) | (in >> shift);\
426 while (shift >= 6) {\
428 tmp = 0x80 | ((in >> shift) & 0x3f);\
448 #define PUT_UTF16(val, tmp, PUT_16BIT)\
455 tmp = 0xD800 | ((in - 0x10000) >> 10);\
457 tmp = 0xDC00 | ((in - 0x10000) & 0x3FF);\
466 #ifdef HAVE_AV_CONFIG_H
478 # define av_ceil_log2 av_ceil_log2_c
481 # define av_clip av_clip_c
484 # define av_clip64 av_clip64_c
486 #ifndef av_clip_uint8
487 # define av_clip_uint8 av_clip_uint8_c
490 # define av_clip_int8 av_clip_int8_c
492 #ifndef av_clip_uint16
493 # define av_clip_uint16 av_clip_uint16_c
495 #ifndef av_clip_int16
496 # define av_clip_int16 av_clip_int16_c
498 #ifndef av_clipl_int32
499 # define av_clipl_int32 av_clipl_int32_c
501 #ifndef av_clip_intp2
502 # define av_clip_intp2 av_clip_intp2_c
504 #ifndef av_clip_uintp2
505 # define av_clip_uintp2 av_clip_uintp2_c
507 #ifndef av_mod_uintp2
508 # define av_mod_uintp2 av_mod_uintp2_c
511 # define av_sat_add32 av_sat_add32_c
513 #ifndef av_sat_dadd32
514 # define av_sat_dadd32 av_sat_dadd32_c
517 # define av_clipf av_clipf_c
520 # define av_clipd av_clipd_c
523 # define av_popcount av_popcount_c
525 #ifndef av_popcount64
526 # define av_popcount64 av_popcount64_c
529 # define av_parity av_parity_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.
static av_always_inline av_const unsigned av_mod_uintp2_c(unsigned a, unsigned p)
Clear high bits from an unsigned integer starting with specific bit position.
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.
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.
common internal API header
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 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 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 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.
static av_always_inline av_const int av_ceil_log2_c(int x)
Compute ceil(log2(x)).
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 unsigned av_clip_uintp2_c(int a, int p)
Clip a signed integer to an unsigned power of two range.