26 #ifndef AVUTIL_COMMON_H
27 #define AVUTIL_COMMON_H
40 #include "libavutil/avconfig.h"
43 # define AV_NE(be, le) (be)
45 # define AV_NE(be, le) (le)
49 #define RSHIFT(a,b) ((a) > 0 ? ((a) + ((1<<(b))>>1))>>(b) : ((a) + ((1<<(b))>>1)-1)>>(b))
51 #define ROUNDED_DIV(a,b) (((a)>0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))
52 #define FFUDIV(a,b) (((a)>0 ?(a):(a)-(b)+1) / (b))
53 #define FFUMOD(a,b) ((a)-(b)*FFUDIV(a,b))
54 #define FFABS(a) ((a) >= 0 ? (a) : (-(a)))
55 #define FFSIGN(a) ((a) > 0 ? 1 : -1)
57 #define FFMAX(a,b) ((a) > (b) ? (a) : (b))
58 #define FFMAX3(a,b,c) FFMAX(FFMAX(a,b),c)
59 #define FFMIN(a,b) ((a) > (b) ? (b) : (a))
60 #define FFMIN3(a,b,c) FFMIN(FFMIN(a,b),c)
62 #define FFSWAP(type,a,b) do{type SWAP_tmp= b; b= a; a= SWAP_tmp;}while(0)
63 #define FF_ARRAY_ELEMS(a) (sizeof(a) / sizeof((a)[0]))
64 #define FFALIGN(x, a) (((x)+(a)-1)&~((a)-1))
75 #ifdef HAVE_AV_CONFIG_H
100 #if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
101 if (amin > amax) abort();
103 if (a < amin)
return amin;
104 else if (a > amax)
return amax;
117 #if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
118 if (amin > amax) abort();
120 if (a < amin)
return amin;
121 else if (a > amax)
return amax;
132 if (a&(~0xFF))
return (-a)>>31;
143 if ((a+0x80) & ~0xFF)
return (a>>31) ^ 0x7F;
154 if (a&(~0xFFFF))
return (-a)>>31;
165 if ((a+0x8000) & ~0xFFFF)
return (a>>31) ^ 0x7FFF;
176 if ((a+0x80000000u) & ~UINT64_C(0xFFFFFFFF))
return (a>>63) ^ 0x7FFFFFFF;
188 if (a & ~((1<<p) - 1))
return -a >> 31 & ((1<<p) - 1);
201 return av_clipl_int32((int64_t)a + b);
213 return av_sat_add32(a, av_sat_add32(b, b));
225 #if defined(HAVE_AV_CONFIG_H) && defined(ASSERT_LEVEL) && ASSERT_LEVEL >= 2
226 if (amin > amax) abort();
228 if (a < amin)
return amin;
229 else if (a > amax)
return amax;
249 x -= (x >> 1) & 0x55555555;
250 x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
251 x = (x + (x >> 4)) & 0x0F0F0F0F;
253 return (x + (x >> 16)) & 0x3F;
263 return av_popcount((uint32_t)x) + av_popcount(x >> 32);
266 #define MKTAG(a,b,c,d) ((a) | ((b) << 8) | ((c) << 16) | ((unsigned)(d) << 24))
267 #define MKBETAG(a,b,c,d) ((d) | ((c) << 8) | ((b) << 16) | ((unsigned)(a) << 24))
280 #define GET_UTF8(val, GET_BYTE, ERROR)\
283 uint32_t top = (val & 128) >> 1;\
284 if ((val & 0xc0) == 0x80)\
287 int tmp= GET_BYTE - 128;\
290 val= (val<<6) + tmp;\
293 val &= (top << 1) - 1;\
305 #define GET_UTF16(val, GET_16BIT, ERROR)\
308 unsigned int hi = val - 0xD800;\
310 val = GET_16BIT - 0xDC00;\
311 if (val > 0x3FFU || hi > 0x3FFU)\
313 val += (hi<<10) + 0x10000;\
333 #define PUT_UTF8(val, tmp, PUT_BYTE)\
341 bytes = (av_log2(in) + 4) / 5;\
342 shift = (bytes - 1) * 6;\
343 tmp = (256 - (256 >> bytes)) | (in >> shift);\
345 while (shift >= 6) {\
347 tmp = 0x80 | ((in >> shift) & 0x3f);\
367 #define PUT_UTF16(val, tmp, PUT_16BIT)\
374 tmp = 0xD800 | ((in - 0x10000) >> 10);\
376 tmp = 0xDC00 | ((in - 0x10000) & 0x3FF);\
385 #ifdef HAVE_AV_CONFIG_H
397 # define av_ceil_log2 av_ceil_log2_c
400 # define av_clip av_clip_c
403 # define av_clip64 av_clip64_c
405 #ifndef av_clip_uint8
406 # define av_clip_uint8 av_clip_uint8_c
409 # define av_clip_int8 av_clip_int8_c
411 #ifndef av_clip_uint16
412 # define av_clip_uint16 av_clip_uint16_c
414 #ifndef av_clip_int16
415 # define av_clip_int16 av_clip_int16_c
417 #ifndef av_clipl_int32
418 # define av_clipl_int32 av_clipl_int32_c
420 #ifndef av_clip_uintp2
421 # define av_clip_uintp2 av_clip_uintp2_c
424 # define av_sat_add32 av_sat_add32_c
426 #ifndef av_sat_dadd32
427 # define av_sat_dadd32 av_sat_dadd32_c
430 # define av_clipf av_clipf_c
433 # define av_popcount av_popcount_c
435 #ifndef av_popcount64
436 # define av_popcount64 av_popcount64_c