347 lines
8.8 KiB
C
347 lines
8.8 KiB
C
/*
|
|
* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file common.h
|
|
* common internal and external api header.
|
|
*/
|
|
|
|
#ifndef COMMON_H
|
|
#define COMMON_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 */
|
|
|
|
#ifndef av_always_inline
|
|
#if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
|
|
# define av_always_inline __attribute__((always_inline)) inline
|
|
# define av_noinline __attribute__((noinline))
|
|
#else
|
|
# define av_always_inline inline
|
|
# define av_noinline
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef HAVE_AV_CONFIG_H
|
|
# include "internal.h"
|
|
#endif /* HAVE_AV_CONFIG_H */
|
|
|
|
#ifndef attribute_deprecated
|
|
#if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
|
|
# define attribute_deprecated __attribute__((deprecated))
|
|
#else
|
|
# define attribute_deprecated
|
|
#endif
|
|
#endif
|
|
|
|
#ifndef INT64_C
|
|
#define INT64_C(c) (c ## LL)
|
|
#define UINT64_C(c) (c ## ULL)
|
|
#endif
|
|
|
|
//rounded divison & 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 FFABS(a) ((a) >= 0 ? (a) : (-(a)))
|
|
#define FFSIGN(a) ((a) > 0 ? 1 : -1)
|
|
|
|
#define FFMAX(a,b) ((a) > (b) ? (a) : (b))
|
|
#define FFMIN(a,b) ((a) > (b) ? (b) : (a))
|
|
|
|
#define FFSWAP(type,a,b) do{type SWAP_tmp= b; b= a; a= SWAP_tmp;}while(0)
|
|
|
|
/* misc math functions */
|
|
extern const uint8_t ff_log2_tab[256];
|
|
|
|
static inline int av_log2(unsigned int v)
|
|
{
|
|
int n;
|
|
|
|
n = 0;
|
|
if (v & 0xffff0000) {
|
|
v >>= 16;
|
|
n += 16;
|
|
}
|
|
if (v & 0xff00) {
|
|
v >>= 8;
|
|
n += 8;
|
|
}
|
|
n += ff_log2_tab[v];
|
|
|
|
return n;
|
|
}
|
|
|
|
static inline int av_log2_16bit(unsigned int v)
|
|
{
|
|
int n;
|
|
|
|
n = 0;
|
|
if (v & 0xff00) {
|
|
v >>= 8;
|
|
n += 8;
|
|
}
|
|
n += ff_log2_tab[v];
|
|
|
|
return n;
|
|
}
|
|
|
|
/* median of 3 */
|
|
static inline 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
|
|
* @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 int clip(int a, int amin, int amax)
|
|
{
|
|
if (a < amin) return amin;
|
|
else if (a > amax) return amax;
|
|
else return a;
|
|
}
|
|
|
|
/**
|
|
* clip a signed integer value into the 0-255 range
|
|
* @param a value to clip
|
|
* @return clipped value
|
|
*/
|
|
static inline uint8_t clip_uint8(int a)
|
|
{
|
|
if (a&(~255)) return (-a)>>31;
|
|
else return a;
|
|
}
|
|
|
|
/* math */
|
|
int64_t ff_gcd(int64_t a, int64_t b);
|
|
|
|
/**
|
|
* converts fourcc string to int
|
|
*/
|
|
static inline 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);
|
|
}
|
|
|
|
#define MKTAG(a,b,c,d) (a | (b << 8) | (c << 16) | (d << 24))
|
|
#define MKBETAG(a,b,c,d) (d | (c << 8) | (b << 16) | (a << 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
|
|
* \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
|
|
* a function or a statement whose return value or evaluated value is of type
|
|
* uint8_t. It will be executed up to 4 times for values in the valid utf-8 range,
|
|
* and up to 7 times in the general case.
|
|
* \param ERROR action that should be taken when an invalid utf-8 byte is returned
|
|
* from GET_BYTE. It should be a statement that jumps out of the macro,
|
|
* like exit(), goto, return, break, or continue.
|
|
*/
|
|
#define GET_UTF8(val, GET_BYTE, ERROR)\
|
|
val= GET_BYTE;\
|
|
{\
|
|
int ones= 7 - av_log2(val ^ 255);\
|
|
if(ones==1)\
|
|
ERROR\
|
|
val&= 127>>ones;\
|
|
while(--ones > 0){\
|
|
int tmp= GET_BYTE - 128;\
|
|
if(tmp>>6)\
|
|
ERROR\
|
|
val= (val<<6) + tmp;\
|
|
}\
|
|
}
|
|
|
|
/*!
|
|
* \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.
|
|
* \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.
|
|
* \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.
|
|
*/
|
|
#define PUT_UTF8(val, tmp, PUT_BYTE)\
|
|
{\
|
|
int bytes, shift;\
|
|
uint32_t in = val;\
|
|
if (in < 0x80) {\
|
|
tmp = in;\
|
|
PUT_BYTE\
|
|
} else {\
|
|
bytes = (av_log2(in) + 4) / 5;\
|
|
shift = (bytes - 1) * 6;\
|
|
tmp = (256 - (256 >> bytes)) | (in >> shift);\
|
|
PUT_BYTE\
|
|
while (shift >= 6) {\
|
|
shift -= 6;\
|
|
tmp = 0x80 | ((in >> shift) & 0x3f);\
|
|
PUT_BYTE\
|
|
}\
|
|
}\
|
|
}
|
|
|
|
#if defined(ARCH_X86) || defined(ARCH_POWERPC)
|
|
#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;
|
|
}
|
|
#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
|
|
|
|
#define START_TIMER \
|
|
uint64_t tend;\
|
|
uint64_t tstart= read_time();\
|
|
|
|
#define STOP_TIMER(id) \
|
|
tend= 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_DEBUG, "%"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
|
|
|
|
/* memory */
|
|
|
|
#ifdef __GNUC__
|
|
#define DECLARE_ALIGNED(n,t,v) t v __attribute__ ((aligned (n)))
|
|
#else
|
|
#define DECLARE_ALIGNED(n,t,v) __declspec(align(n)) t v
|
|
#endif
|
|
|
|
/* memory */
|
|
void *av_malloc(unsigned int size);
|
|
void *av_realloc(void *ptr, unsigned int size);
|
|
void av_free(void *ptr);
|
|
|
|
void *av_mallocz(unsigned int size);
|
|
char *av_strdup(const char *s);
|
|
void av_freep(void *ptr);
|
|
|
|
#endif /* COMMON_H */
|