*/
/**
- * @file common.h
+ * @file libavutil/common.h
* common internal and external API header
*/
-#ifndef FFMPEG_COMMON_H
-#define FFMPEG_COMMON_H
+#ifndef AVUTIL_COMMON_H
+#define AVUTIL_COMMON_H
+#include <ctype.h>
+#include <errno.h>
#include <inttypes.h>
-
-#ifdef HAVE_AV_CONFIG_H
-/* only include the following when compiling package */
-# include "config.h"
-
-# include <stdlib.h>
-# include <stdio.h>
-# include <string.h>
-# include <ctype.h>
-# include <limits.h>
-# include <errno.h>
-# include <math.h>
-#endif /* HAVE_AV_CONFIG_H */
+#include <limits.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef __GNUC__
+# define AV_GCC_VERSION_AT_LEAST(x,y) (__GNUC__ > x || __GNUC__ == x && __GNUC_MINOR__ >= y)
+#else
+# define AV_GCC_VERSION_AT_LEAST(x,y) 0
+#endif
#ifndef av_always_inline
-#if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
+#if AV_GCC_VERSION_AT_LEAST(3,1)
# define av_always_inline __attribute__((always_inline)) inline
#else
# define av_always_inline inline
#endif
#ifndef av_noinline
-#if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
+#if AV_GCC_VERSION_AT_LEAST(3,1)
# define av_noinline __attribute__((noinline))
#else
# define av_noinline
#endif
#ifndef av_pure
-#if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
+#if AV_GCC_VERSION_AT_LEAST(3,1)
# define av_pure __attribute__((pure))
#else
# define av_pure
#endif
#ifndef av_const
-#if defined(__GNUC__) && (__GNUC__ > 2 || __GNUC__ == 2 && __GNUC_MINOR__ > 5)
+#if AV_GCC_VERSION_AT_LEAST(2,6)
# define av_const __attribute__((const))
#else
# define av_const
#endif
#ifndef av_cold
-#if defined(__GNUC__) && (__GNUC__ > 4 || __GNUC__ == 4 && __GNUC_MINOR__ > 2)
+#if (!defined(__ICC) || __ICC > 1110) && AV_GCC_VERSION_AT_LEAST(4,3)
# define av_cold __attribute__((cold))
#else
# define av_cold
#endif
#endif
-#ifdef HAVE_AV_CONFIG_H
-# include "internal.h"
-#endif /* HAVE_AV_CONFIG_H */
+#ifndef av_flatten
+#if (!defined(__ICC) || __ICC > 1110) && AV_GCC_VERSION_AT_LEAST(4,1)
+# define av_flatten __attribute__((flatten))
+#else
+# define av_flatten
+#endif
+#endif
#ifndef attribute_deprecated
-#if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
+#if AV_GCC_VERSION_AT_LEAST(3,1)
# define attribute_deprecated __attribute__((deprecated))
#else
# define attribute_deprecated
#endif
#endif
-#include "mem.h"
+#ifndef av_uninit
+#if defined(__GNUC__) && !defined(__ICC)
+# define av_uninit(x) x=x
+#else
+# define av_uninit(x) x
+#endif
+#endif
-//rounded divison & shift
+//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 FFMIN3(a,b,c) FFMIN(FFMIN(a,b),c)
#define FFSWAP(type,a,b) do{type SWAP_tmp= b; b= a; a= SWAP_tmp;}while(0)
+#define FF_ARRAY_ELEMS(a) (sizeof(a) / sizeof((a)[0]))
+#define FFALIGN(x, a) (((x)+(a)-1)&~((a)-1))
/* misc math functions */
extern const uint8_t ff_log2_tab[256];
return n;
}
-/* median of 3 */
-static inline av_const int mid_pred(int a, int b, int c)
-{
-#ifdef HAVE_CMOV
- int i=b;
- asm volatile(
- "cmp %2, %1 \n\t"
- "cmovg %1, %0 \n\t"
- "cmovg %2, %1 \n\t"
- "cmp %3, %1 \n\t"
- "cmovl %3, %1 \n\t"
- "cmp %1, %0 \n\t"
- "cmovg %1, %0 \n\t"
- :"+&r"(i), "+&r"(a)
- :"r"(b), "r"(c)
- );
- return i;
-#elif 0
- int t= (a-b)&((a-b)>>31);
- a-=t;
- b+=t;
- b-= (b-c)&((b-c)>>31);
- b+= (a-b)&((a-b)>>31);
-
- return b;
-#else
- if(a>b){
- if(c>b){
- if(c>a) b=a;
- else b=c;
- }
- }else{
- if(b>c){
- if(c>a) b=c;
- else b=a;
- }
- }
- return b;
-#endif
-}
-
/**
- * clip a signed integer value into the amin-amax range
+ * Clips a signed integer value into the amin-amax range.
* @param a value to clip
* @param amin minimum value of the clip range
* @param amax maximum value of the clip range
}
/**
- * clip a signed integer value into the 0-255 range
+ * Clips a signed integer value into the 0-255 range.
* @param a value to clip
* @return clipped value
*/
}
/**
- * clip a signed integer value into the -32768,32767 range
+ * Clips a signed integer value into the -32768,32767 range.
* @param a value to clip
* @return clipped value
*/
else return a;
}
-/* math */
-int64_t av_const ff_gcd(int64_t a, int64_t b);
-
/**
- * converts fourcc string to int
+ * Clips a float value into the amin-amax range.
+ * @param a value to clip
+ * @param amin minimum value of the clip range
+ * @param amax maximum value of the clip range
+ * @return clipped value
*/
-static inline av_pure int ff_get_fourcc(const char *s){
-#ifdef HAVE_AV_CONFIG_H
- assert( strlen(s)==4 );
-#endif
-
- return (s[0]) + (s[1]<<8) + (s[2]<<16) + (s[3]<<24);
+static inline av_const float av_clipf(float a, float amin, float amax)
+{
+ if (a < amin) return amin;
+ else if (a > amax) return amax;
+ else return a;
}
#define MKTAG(a,b,c,d) (a | (b << 8) | (c << 16) | (d << 24))
/*!
* \def GET_UTF8(val, GET_BYTE, ERROR)
- * converts a UTF-8 character (up to 4 bytes long) to its 32-bit UCS-4 encoded form
+ * Converts a UTF-8 character (up to 4 bytes long) to its 32-bit UCS-4 encoded form
* \param val is the output and should be of type uint32_t. It holds the converted
* UCS-4 character and should be a left value.
* \param GET_BYTE gets UTF-8 encoded bytes from any proper source. It can be
/*!
* \def PUT_UTF8(val, tmp, PUT_BYTE)
- * converts a 32-bit unicode character to its UTF-8 encoded form (up to 4 bytes long).
- * \param val is an input only argument and should be of type uint32_t. It holds
- * a ucs4 encoded unicode character that is to be converted to UTF-8. If
- * val is given as a function it's executed only once.
+ * Converts a 32-bit Unicode character to its UTF-8 encoded form (up to 4 bytes long).
+ * \param val is an input-only argument and should be of type uint32_t. It holds
+ * a UCS-4 encoded Unicode character that is to be converted to UTF-8. If
+ * val is given as a function it is executed only once.
* \param tmp is a temporary variable and should be of type uint8_t. It
* represents an intermediate value during conversion that is to be
- * outputted by PUT_BYTE.
+ * output by PUT_BYTE.
* \param PUT_BYTE writes the converted UTF-8 bytes to any proper destination.
* It could be a function or a statement, and uses tmp as the input byte.
* For example, PUT_BYTE could be "*output++ = tmp;" PUT_BYTE will be
* executed up to 4 times for values in the valid UTF-8 range and up to
* 7 times in the general case, depending on the length of the converted
- * unicode character.
+ * Unicode character.
*/
#define PUT_UTF8(val, tmp, PUT_BYTE)\
{\
}\
}
-#if defined(ARCH_X86) || defined(ARCH_POWERPC) || defined(ARCH_BFIN)
-#define AV_READ_TIME read_time
-#if defined(ARCH_X86_64)
-static inline uint64_t read_time(void)
-{
- uint64_t a, d;
- asm volatile("rdtsc\n\t"
- : "=a" (a), "=d" (d));
- return (d << 32) | (a & 0xffffffff);
-}
-#elif defined(ARCH_X86_32)
-static inline long long read_time(void)
-{
- long long l;
- asm volatile("rdtsc\n\t"
- : "=A" (l));
- return l;
-}
-#elif ARCH_BFIN
-static inline uint64_t read_time(void)
-{
- union {
- struct {
- unsigned lo;
- unsigned hi;
- } p;
- unsigned long long c;
- } t;
- asm volatile ("%0=cycles; %1=cycles2;" : "=d" (t.p.lo), "=d" (t.p.hi));
- return t.c;
-}
-#else //FIXME check ppc64
-static inline uint64_t read_time(void)
-{
- uint32_t tbu, tbl, temp;
-
- /* from section 2.2.1 of the 32-bit PowerPC PEM */
- asm volatile(
- "1:\n"
- "mftbu %2\n"
- "mftb %0\n"
- "mftbu %1\n"
- "cmpw %2,%1\n"
- "bne 1b\n"
- : "=r"(tbl), "=r"(tbu), "=r"(temp)
- :
- : "cc");
-
- return (((uint64_t)tbu)<<32) | (uint64_t)tbl;
-}
-#endif
-#elif defined(HAVE_GETHRTIME)
-#define AV_READ_TIME gethrtime
-#endif
-
-#ifdef AV_READ_TIME
-#define START_TIMER \
-uint64_t tend;\
-uint64_t tstart= AV_READ_TIME();\
-
-#define STOP_TIMER(id) \
-tend= AV_READ_TIME();\
-{\
- static uint64_t tsum=0;\
- static int tcount=0;\
- static int tskip_count=0;\
- if(tcount<2 || tend - tstart < FFMAX(8*tsum/tcount, 2000)){\
- tsum+= tend - tstart;\
- tcount++;\
- }else\
- tskip_count++;\
- if(((tcount+tskip_count)&(tcount+tskip_count-1))==0){\
- av_log(NULL, AV_LOG_ERROR, "%"PRIu64" dezicycles in %s, %d runs, %d skips\n",\
- tsum*10/tcount, id, tcount, tskip_count);\
- }\
-}
-#else
-#define START_TIMER
-#define STOP_TIMER(id) {}
-#endif
+#include "mem.h"
-/**
- * Returns NULL if CONFIG_SMALL is defined otherwise the argument
- * without modifications, used to disable the definition of strings
- * (for example AVCodec long_names).
- */
-#ifdef CONFIG_SMALL
-# define NULL_IF_CONFIG_SMALL(x) NULL
-#else
-# define NULL_IF_CONFIG_SMALL(x) x
-#endif
+#ifdef HAVE_AV_CONFIG_H
+# include "config.h"
+# include "internal.h"
+#endif /* HAVE_AV_CONFIG_H */
-#endif /* FFMPEG_COMMON_H */
+#endif /* AVUTIL_COMMON_H */
projects / ffmpeg / blobdiff