26 #ifndef AVUTIL_COMMON_H
27 #define AVUTIL_COMMON_H
41 # define AV_NE(be, le) (be)
43 # define AV_NE(be, le) (le)
47 #define RSHIFT(a,b) ((a) > 0 ? ((a) + ((1<<(b))>>1))>>(b) : ((a) + ((1<<(b))>>1)-1)>>(b))
49 #define ROUNDED_DIV(a,b) (((a)>0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))
50 #define FFABS(a) ((a) >= 0 ? (a) : (-(a)))
51 #define FFSIGN(a) ((a) > 0 ? 1 : -1)
53 #define FFMAX(a,b) ((a) > (b) ? (a) : (b))
54 #define FFMAX3(a,b,c) FFMAX(FFMAX(a,b),c)
55 #define FFMIN(a,b) ((a) > (b) ? (b) : (a))
56 #define FFMIN3(a,b,c) FFMIN(FFMIN(a,b),c)
58 #define FFSWAP(type,a,b) do{type SWAP_tmp= b; b= a; a= SWAP_tmp;}while(0)
59 #define FF_ARRAY_ELEMS(a) (sizeof(a) / sizeof((a)[0]))
60 #define FFALIGN(x, a) (((x)+(a)-1)&~((a)-1))
95 #ifdef HAVE_AV_CONFIG_H
112 if (a < amin)
return amin;
113 else if (a > amax)
return amax;
124 if (a&(~0xFF))
return (-a)>>31;
135 if ((a+0x80) & ~0xFF)
return (a>>31) ^ 0x7F;
146 if (a&(~0xFFFF))
return (-a)>>31;
157 if ((a+0x8000) & ~0xFFFF)
return (a>>31) ^ 0x7FFF;
168 if ((a+0x80000000u) & ~UINT64_C(0xFFFFFFFF))
return (a>>63) ^ 0x7FFFFFFF;
180 if (a & ~((1<<p) - 1))
return -a >> 31 & ((1<<p) - 1);
193 if (a < amin)
return amin;
194 else if (a > amax)
return amax;
204 return av_log2((x - 1) << 1);
214 x -= (x >> 1) & 0x55555555;
215 x = (x & 0x33333333) + ((x >> 2) & 0x33333333);
216 x = (x + (x >> 4)) & 0x0F0F0F0F;
218 return (x + (x >> 16)) & 0x3F;
228 return av_popcount(x) + av_popcount(x >> 32);
231 #define MKTAG(a,b,c,d) ((a) | ((b) << 8) | ((c) << 16) | ((unsigned)(d) << 24))
232 #define MKBETAG(a,b,c,d) ((d) | ((c) << 8) | ((b) << 16) | ((unsigned)(a) << 24))
245 #define GET_UTF8(val, GET_BYTE, ERROR)\
248 int ones= 7 - av_log2(val ^ 255);\
253 int tmp= GET_BYTE - 128;\
256 val= (val<<6) + tmp;\
269 #define GET_UTF16(val, GET_16BIT, ERROR)\
272 unsigned int hi = val - 0xD800;\
274 val = GET_16BIT - 0xDC00;\
275 if (val > 0x3FFU || hi > 0x3FFU)\
277 val += (hi<<10) + 0x10000;\
297 #define PUT_UTF8(val, tmp, PUT_BYTE)\
305 bytes = (av_log2(in) + 4) / 5;\
306 shift = (bytes - 1) * 6;\
307 tmp = (256 - (256 >> bytes)) | (in >> shift);\
309 while (shift >= 6) {\
311 tmp = 0x80 | ((in >> shift) & 0x3f);\
331 #define PUT_UTF16(val, tmp, PUT_16BIT)\
338 tmp = 0xD800 | ((in - 0x10000) >> 10);\
340 tmp = 0xDC00 | ((in - 0x10000) & 0x3FF);\
349 #ifdef HAVE_AV_CONFIG_H
361 # define av_log2 av_log2_c
363 #ifndef av_log2_16bit
364 # define av_log2_16bit av_log2_16bit_c
367 # define av_ceil_log2 av_ceil_log2_c
370 # define av_clip av_clip_c
372 #ifndef av_clip_uint8
373 # define av_clip_uint8 av_clip_uint8_c
376 # define av_clip_int8 av_clip_int8_c
378 #ifndef av_clip_uint16
379 # define av_clip_uint16 av_clip_uint16_c
381 #ifndef av_clip_int16
382 # define av_clip_int16 av_clip_int16_c
384 #ifndef av_clipl_int32
385 # define av_clipl_int32 av_clipl_int32_c
387 #ifndef av_clip_uintp2
388 # define av_clip_uintp2 av_clip_uintp2_c
391 # define av_clipf av_clipf_c
394 # define av_popcount av_popcount_c
396 #ifndef av_popcount64
397 # define av_popcount64 av_popcount64_c