common.h
资源名称:X264CODEC.rar [点击查看]
上传用户:lctgjx
上传日期:2022-06-04
资源大小:8887k
文件大小:11k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual 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 FFMPEG_COMMON_H
- #define FFMPEG_COMMON_H
- #if defined(WIN32) && !defined(__MINGW32__) && !defined(__CYGWIN__)
- # define CONFIG_WIN32
- #endif
- #if defined(WIN32) && !defined(__MINGW32__) && !defined(__CYGWIN__) && !defined(EMULATE_INTTYPES)
- # define EMULATE_INTTYPES
- #endif
- #ifndef EMULATE_INTTYPES
- # include <inttypes.h>
- #else
- typedef signed char int8_t;
- typedef signed short int16_t;
- typedef signed int int32_t;
- typedef unsigned char uint8_t;
- typedef unsigned short uint16_t;
- typedef unsigned int uint32_t;
- # ifdef CONFIG_WIN32
- typedef signed __int64 int64_t;
- typedef unsigned __int64 uint64_t;
- # else /* other OS */
- typedef signed long long int64_t;
- typedef unsigned long long uint64_t;
- # endif /* other OS */
- #endif /* EMULATE_INTTYPES */
- #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
- #else
- # define av_always_inline inline
- #endif
- #endif
- #ifndef av_noinline
- #if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
- # define av_noinline __attribute__((noinline))
- #else
- # define av_noinline
- #endif
- #endif
- #ifndef av_pure
- #if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
- # define av_pure __attribute__((pure))
- #else
- # define av_pure
- #endif
- #endif
- #ifndef av_const
- #if defined(__GNUC__) && (__GNUC__ > 2 || __GNUC__ == 2 && __GNUC_MINOR__ > 5)
- # define av_const __attribute__((const))
- #else
- # define av_const
- #endif
- #endif
- #ifndef av_cold
- #if defined(__GNUC__) && (__GNUC__ > 4 || __GNUC__ == 4 && __GNUC_MINOR__ > 2)
- # 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 attribute_deprecated
- #if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
- # define attribute_deprecated __attribute__((deprecated))
- #else
- # define attribute_deprecated
- #endif
- #endif
- #ifndef av_unused
- #if defined(__GNUC__)
- # define av_unused __attribute__((unused))
- #else
- # define av_unused
- #endif
- #endif
- #define inline _inline
- #include "mem.h"
- //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 FFMAX3(a,b,c) FFMAX(FFMAX(a,b),c)
- #define FFMIN(a,b) ((a) > (b) ? (b) : (a))
- #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)
- /* misc math functions */
- extern const uint8_t ff_log2_tab[256];
- static inline av_const int av_log2(unsigned int v)
- {
- int 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 av_const int av_log2_16bit(unsigned int v)
- {
- int n = 0;
- if (v & 0xff00) {
- v >>= 8;
- n += 8;
- }
- n += ff_log2_tab[v];
- 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 nt"
- "cmovg %1, %0 nt"
- "cmovg %2, %1 nt"
- "cmp %3, %1 nt"
- "cmovl %3, %1 nt"
- "cmp %1, %0 nt"
- "cmovg %1, %0 nt"
- :"+&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 av_const int av_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 av_const uint8_t av_clip_uint8(int a)
- {
- if (a&(~255)) return (-a)>>31;
- else return a;
- }
- /**
- * clip a signed integer value into the -32768,32767 range
- * @param a value to clip
- * @return clipped value
- */
- static inline av_const int16_t av_clip_int16(int a)
- {
- if ((a+32768) & ~65535) return (a>>31) ^ 32767;
- else return a;
- }
- /* math */
- int64_t av_const ff_gcd(int64_t a, int64_t b);
- /**
- * converts fourcc string to int
- */
- 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);
- }
- #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) || 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("rdtscnt"
- : "=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("rdtscnt"
- : "=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 %2n"
- "mftb %0n"
- "mftbu %1n"
- "cmpw %2,%1n"
- "bne 1bn"
- : "=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 skipsn",
- tsum*10/tcount, id, tcount, tskip_count);
- }
- }
- #else
- #define START_TIMER
- #define STOP_TIMER(id) {}
- #endif
- /**
- * 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
- #endif /* FFMPEG_COMMON_H */