//rounded division & shift
#define RSHIFT(a,b) ((a) > 0 ? ((a) + ((1<<(b))>>1))>>(b) : ((a) + ((1<<(b))>>1)-1)>>(b))
/* assume b>0 */
-#define ROUNDED_DIV(a,b) (((a)>0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))
+#define ROUNDED_DIV(a,b) (((a)>=0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))
/* Fast a/(1<<b) rounded toward +inf. Assume a>=0 and b>=0 */
#define AV_CEIL_RSHIFT(a,b) (!av_builtin_constant_p(b) ? -((-(a)) >> (b)) \
: ((a) + (1<<(b)) - 1) >> (b))
*/
#define FFNABS(a) ((a) <= 0 ? (a) : (-(a)))
+/**
+ * Unsigned Absolute value.
+ * This takes the absolute value of a signed int and returns it as a unsigned.
+ * This also works with INT_MIN which would otherwise not be representable
+ * As with many macros, this evaluates its argument twice.
+ */
+#define FFABSU(a) ((a) <= 0 ? -(unsigned)(a) : (unsigned)(a))
+#define FFABS64U(a) ((a) <= 0 ? -(uint64_t)(a) : (uint64_t)(a))
+
/**
* Comparator.
* For two numerical expressions x and y, gives 1 if x > y, -1 if x < y, and 0
# include "intmath.h"
#endif
-/* Pull in unguarded fallback defines at the end of this file. */
-#include "common.h"
+#ifndef av_ceil_log2
+# define av_ceil_log2 av_ceil_log2_c
+#endif
+#ifndef av_clip
+# define av_clip av_clip_c
+#endif
+#ifndef av_clip64
+# define av_clip64 av_clip64_c
+#endif
+#ifndef av_clip_uint8
+# define av_clip_uint8 av_clip_uint8_c
+#endif
+#ifndef av_clip_int8
+# define av_clip_int8 av_clip_int8_c
+#endif
+#ifndef av_clip_uint16
+# define av_clip_uint16 av_clip_uint16_c
+#endif
+#ifndef av_clip_int16
+# define av_clip_int16 av_clip_int16_c
+#endif
+#ifndef av_clipl_int32
+# define av_clipl_int32 av_clipl_int32_c
+#endif
+#ifndef av_clip_intp2
+# define av_clip_intp2 av_clip_intp2_c
+#endif
+#ifndef av_clip_uintp2
+# define av_clip_uintp2 av_clip_uintp2_c
+#endif
+#ifndef av_mod_uintp2
+# define av_mod_uintp2 av_mod_uintp2_c
+#endif
+#ifndef av_sat_add32
+# define av_sat_add32 av_sat_add32_c
+#endif
+#ifndef av_sat_dadd32
+# define av_sat_dadd32 av_sat_dadd32_c
+#endif
+#ifndef av_sat_sub32
+# define av_sat_sub32 av_sat_sub32_c
+#endif
+#ifndef av_sat_dsub32
+# define av_sat_dsub32 av_sat_dsub32_c
+#endif
+#ifndef av_sat_add64
+# define av_sat_add64 av_sat_add64_c
+#endif
+#ifndef av_sat_sub64
+# define av_sat_sub64 av_sat_sub64_c
+#endif
+#ifndef av_clipf
+# define av_clipf av_clipf_c
+#endif
+#ifndef av_clipd
+# define av_clipd av_clipd_c
+#endif
+#ifndef av_popcount
+# define av_popcount av_popcount_c
+#endif
+#ifndef av_popcount64
+# define av_popcount64 av_popcount64_c
+#endif
+#ifndef av_parity
+# define av_parity av_parity_c
+#endif
#ifndef av_log2
av_const int av_log2(unsigned v);
*/
static av_always_inline av_const unsigned av_mod_uintp2_c(unsigned a, unsigned p)
{
- return a & ((1 << p) - 1);
+ return a & ((1U << p) - 1);
}
/**
return av_sat_sub32(a, av_sat_add32(b, b));
}
+/**
+ * Add two signed 64-bit values with saturation.
+ *
+ * @param a one value
+ * @param b another value
+ * @return sum with signed saturation
+ */
+static av_always_inline int64_t av_sat_add64_c(int64_t a, int64_t b) {
+#if (!defined(__INTEL_COMPILER) && AV_GCC_VERSION_AT_LEAST(5,1)) || AV_HAS_BUILTIN(__builtin_add_overflow)
+ int64_t tmp;
+ return !__builtin_add_overflow(a, b, &tmp) ? tmp : (tmp < 0 ? INT64_MAX : INT64_MIN);
+#else
+ int64_t s = a+(uint64_t)b;
+ if ((int64_t)(a^b | ~s^b) >= 0)
+ return INT64_MAX ^ (b >> 63);
+ return s;
+#endif
+}
+
+/**
+ * Subtract two signed 64-bit values with saturation.
+ *
+ * @param a one value
+ * @param b another value
+ * @return difference with signed saturation
+ */
+static av_always_inline int64_t av_sat_sub64_c(int64_t a, int64_t b) {
+#if (!defined(__INTEL_COMPILER) && AV_GCC_VERSION_AT_LEAST(5,1)) || AV_HAS_BUILTIN(__builtin_sub_overflow)
+ int64_t tmp;
+ return !__builtin_sub_overflow(a, b, &tmp) ? tmp : (tmp < 0 ? INT64_MAX : INT64_MIN);
+#else
+ if (b <= 0 && a >= INT64_MAX + b)
+ return INT64_MAX;
+ if (b >= 0 && a <= INT64_MIN + b)
+ return INT64_MIN;
+ return a - b;
+#endif
+}
+
/**
* Clip a float value into the amin-amax range.
* @param a value to clip
*/
static av_always_inline av_const int av_ceil_log2_c(int x)
{
- return av_log2((x - 1) << 1);
+ return av_log2((x - 1U) << 1);
}
/**
* @param GET_BYTE Expression reading one byte from the input.
* Evaluated up to 7 times (4 for the currently
* assigned Unicode range). With a memory buffer
- * input, this could be *ptr++.
+ * input, this could be *ptr++, or if you want to make sure
+ * that *ptr stops at the end of a NULL terminated string then
+ * *ptr ? *ptr++ : 0
* @param ERROR Expression to be evaluated on invalid input,
* typically a goto statement.
*
{\
uint32_t top = (val & 128) >> 1;\
if ((val & 0xc0) == 0x80 || val >= 0xFE)\
- ERROR\
+ {ERROR}\
while (val & top) {\
- int tmp= (GET_BYTE) - 128;\
+ unsigned int tmp = (GET_BYTE) - 128;\
if(tmp>>6)\
- ERROR\
+ {ERROR}\
val= (val<<6) + tmp;\
top <<= 5;\
}\
* typically a goto statement.
*/
#define GET_UTF16(val, GET_16BIT, ERROR)\
- val = GET_16BIT;\
+ val = (GET_16BIT);\
{\
unsigned int hi = val - 0xD800;\
if (hi < 0x800) {\
- val = GET_16BIT - 0xDC00;\
+ val = (GET_16BIT) - 0xDC00;\
if (val > 0x3FFU || hi > 0x3FFU)\
- ERROR\
+ {ERROR}\
val += (hi<<10) + 0x10000;\
}\
}\
#endif /* HAVE_AV_CONFIG_H */
#endif /* AVUTIL_COMMON_H */
-
-/*
- * The following definitions are outside the multiple inclusion guard
- * to ensure they are immediately available in intmath.h.
- */
-
-#ifndef av_ceil_log2
-# define av_ceil_log2 av_ceil_log2_c
-#endif
-#ifndef av_clip
-# define av_clip av_clip_c
-#endif
-#ifndef av_clip64
-# define av_clip64 av_clip64_c
-#endif
-#ifndef av_clip_uint8
-# define av_clip_uint8 av_clip_uint8_c
-#endif
-#ifndef av_clip_int8
-# define av_clip_int8 av_clip_int8_c
-#endif
-#ifndef av_clip_uint16
-# define av_clip_uint16 av_clip_uint16_c
-#endif
-#ifndef av_clip_int16
-# define av_clip_int16 av_clip_int16_c
-#endif
-#ifndef av_clipl_int32
-# define av_clipl_int32 av_clipl_int32_c
-#endif
-#ifndef av_clip_intp2
-# define av_clip_intp2 av_clip_intp2_c
-#endif
-#ifndef av_clip_uintp2
-# define av_clip_uintp2 av_clip_uintp2_c
-#endif
-#ifndef av_mod_uintp2
-# define av_mod_uintp2 av_mod_uintp2_c
-#endif
-#ifndef av_sat_add32
-# define av_sat_add32 av_sat_add32_c
-#endif
-#ifndef av_sat_dadd32
-# define av_sat_dadd32 av_sat_dadd32_c
-#endif
-#ifndef av_sat_sub32
-# define av_sat_sub32 av_sat_sub32_c
-#endif
-#ifndef av_sat_dsub32
-# define av_sat_dsub32 av_sat_dsub32_c
-#endif
-#ifndef av_clipf
-# define av_clipf av_clipf_c
-#endif
-#ifndef av_clipd
-# define av_clipd av_clipd_c
-#endif
-#ifndef av_popcount
-# define av_popcount av_popcount_c
-#endif
-#ifndef av_popcount64
-# define av_popcount64 av_popcount64_c
-#endif
-#ifndef av_parity
-# define av_parity av_parity_c
-#endif
projects / ffmpeg / blobdiff