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 # define AV_NE(be, le) (be)
49 # define AV_NE(be, le) (le)
53 #define RSHIFT(a,b) ((a) > 0 ? ((a) + ((1<<(b))>>1))>>(b) : ((a) + ((1<<(b))>>1)-1)>>(b))
55 #define ROUNDED_DIV(a,b) (((a)>0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))
57 #define FF_CEIL_RSHIFT(a,b) (!av_builtin_constant_p(b) ? -((-(a)) >> (b)) \
58 : ((a) + (1<<(b)) - 1) >> (b))
59 #define FFUDIV(a,b) (((a)>0 ?(a):(a)-(b)+1) / (b))
60 #define FFUMOD(a,b) ((a)-(b)*FFUDIV(a,b))
68 #define FFABS(a) ((a) >= 0 ? (a) : (-(a)))
69 #define FFSIGN(a) ((a) > 0 ? 1 : -1)
77 #define FFNABS(a) ((a) <= 0 ? (a) : (-(a)))
79 #define FFMAX(a,b) ((a) > (b) ? (a) : (b))
80 #define FFMAX3(a,b,c) FFMAX(FFMAX(a,b),c)
81 #define FFMIN(a,b) ((a) > (b) ? (b) : (a))
82 #define FFMIN3(a,b,c) FFMIN(FFMIN(a,b),c)
84 #define FFSWAP(type,a,b) do{type SWAP_tmp= b; b= a; a= SWAP_tmp;}while(0)
85 #define FF_ARRAY_ELEMS(a) (sizeof(a) / sizeof((a)[0]))
86 #define FFALIGN(x, a) (((x)+(a)-1)&~((a)-1))
97 #ifdef HAVE_AV_CONFIG_H
109 #ifndef av_log2_16bit
122 #if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
123 if (amin > amax) abort();
125 if (a < amin)
return amin;
126 else if (a > amax)
return amax;
139 #if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
140 if (amin > amax) abort();
142 if (a < amin)
return amin;
143 else if (a > amax)
return amax;
154 if (a&(~0xFF))
return (-a)>>31;
165 if ((a+0x80U) & ~0xFF)
return (a>>31) ^ 0x7F;
176 if (a&(~0xFFFF))
return (-a)>>31;
187 if ((a+0x8000U) & ~0xFFFF)
return (a>>31) ^ 0x7FFF;
198 if ((a+0x80000000u) & ~UINT64_C(0xFFFFFFFF))
return (
int32_t)((a>>63) ^ 0x7FFFFFFF);
210 if ((a + (1 << p)) & ~((2 << p) - 1))
211 return (a >> 31) ^ ((1 << p) - 1);
224 if (a & ~((1<<p) - 1))
return -a >> 31 & ((1<<p) - 1);
237 return av_clipl_int32((int64_t)a + b);
249 return av_sat_add32(a, av_sat_add32(b, b));
261 #if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
262 if (amin > amax) abort();
264 if (a < amin)
return amin;
265 else if (a > amax)
return amax;
278 #if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
279 if (amin > amax) abort();
281 if (a < amin)
return amin;
282 else if (a > amax)
return amax;
302 x -= (x >> 1) & 0x55555555;
303 x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
304 x = (x + (x >> 4)) & 0x0F0F0F0F;
306 return (x + (x >> 16)) & 0x3F;
316 return av_popcount((uint32_t)x) + av_popcount((uint32_t)(x >> 32));
319 #define MKTAG(a,b,c,d) ((a) | ((b) << 8) | ((c) << 16) | ((unsigned)(d) << 24))
320 #define MKBETAG(a,b,c,d) ((d) | ((c) << 8) | ((b) << 16) | ((unsigned)(a) << 24))
338 #define GET_UTF8(val, GET_BYTE, ERROR)\
341 uint32_t top = (val & 128) >> 1;\
342 if ((val & 0xc0) == 0x80 || val >= 0xFE)\
345 int tmp= GET_BYTE - 128;\
348 val= (val<<6) + tmp;\
351 val &= (top << 1) - 1;\
363 #define GET_UTF16(val, GET_16BIT, ERROR)\
366 unsigned int hi = val - 0xD800;\
368 val = GET_16BIT - 0xDC00;\
369 if (val > 0x3FFU || hi > 0x3FFU)\
371 val += (hi<<10) + 0x10000;\
391 #define PUT_UTF8(val, tmp, PUT_BYTE)\
399 bytes = (av_log2(in) + 4) / 5;\
400 shift = (bytes - 1) * 6;\
401 tmp = (256 - (256 >> bytes)) | (in >> shift);\
403 while (shift >= 6) {\
405 tmp = 0x80 | ((in >> shift) & 0x3f);\
425 #define PUT_UTF16(val, tmp, PUT_16BIT)\
432 tmp = 0xD800 | ((in - 0x10000) >> 10);\
434 tmp = 0xDC00 | ((in - 0x10000) & 0x3FF);\
443 #ifdef HAVE_AV_CONFIG_H
444 # include "internal.h"
455 # define av_ceil_log2 av_ceil_log2_c
458 # define av_clip av_clip_c
461 # define av_clip64 av_clip64_c
463 #ifndef av_clip_uint8
464 # define av_clip_uint8 av_clip_uint8_c
467 # define av_clip_int8 av_clip_int8_c
469 #ifndef av_clip_uint16
470 # define av_clip_uint16 av_clip_uint16_c
472 #ifndef av_clip_int16
473 # define av_clip_int16 av_clip_int16_c
475 #ifndef av_clipl_int32
476 # define av_clipl_int32 av_clipl_int32_c
478 #ifndef av_clip_intp2
479 # define av_clip_intp2 av_clip_intp2_c
481 #ifndef av_clip_uintp2
482 # define av_clip_uintp2 av_clip_uintp2_c
485 # define av_sat_add32 av_sat_add32_c
487 #ifndef av_sat_dadd32
488 # define av_sat_dadd32 av_sat_dadd32_c
491 # define av_clipf av_clipf_c
494 # define av_clipd av_clipd_c
497 # define av_popcount av_popcount_c
499 #ifndef av_popcount64
500 # define av_popcount64 av_popcount64_c