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Diffstat (limited to 'contrib/ffmpeg/libavutil/common.h')
| -rw-r--r-- | contrib/ffmpeg/libavutil/common.h | 449 |
1 files changed, 449 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavutil/common.h b/contrib/ffmpeg/libavutil/common.h new file mode 100644 index 000000000..41bbe8f63 --- /dev/null +++ b/contrib/ffmpeg/libavutil/common.h @@ -0,0 +1,449 @@ +/* + * 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 + +#ifndef M_PI +#define M_PI 3.14159265358979323846 +#endif + +#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> +# ifndef __BEOS__ +# include <errno.h> +# else +# include "berrno.h" +# endif +# include <math.h> +#endif /* HAVE_AV_CONFIG_H */ + +/* Suppress restrict if it was not defined in config.h. */ +#ifndef restrict +# define restrict +#endif + +#ifndef always_inline +#if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0) +# define always_inline __attribute__((always_inline)) inline +#else +# define always_inline inline +#endif +#endif + +#ifndef attribute_used +#if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0) +# define attribute_used __attribute__((used)) +#else +# define attribute_used +#endif +#endif + +#ifndef attribute_unused +#if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0) +# define attribute_unused __attribute__((unused)) +#else +# define attribute_unused +#endif +#endif + +#ifndef attribute_deprecated +#if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0) +# define attribute_deprecated __attribute__((deprecated)) +#else +# define attribute_deprecated +#endif +#endif + +# include <inttypes.h> + +#ifndef PRId64 +#define PRId64 "lld" +#endif + +#ifndef PRIu64 +#define PRIu64 "llu" +#endif + +#ifndef PRIx64 +#define PRIx64 "llx" +#endif + +#ifndef PRIX64 +#define PRIX64 "llX" +#endif + +#ifndef PRId32 +#define PRId32 "d" +#endif + +#ifndef PRIdFAST16 +#define PRIdFAST16 PRId32 +#endif + +#ifndef PRIdFAST32 +#define PRIdFAST32 PRId32 +#endif + +#ifndef INT16_MIN +#define INT16_MIN (-0x7fff-1) +#endif + +#ifndef INT16_MAX +#define INT16_MAX 0x7fff +#endif + +#ifndef INT32_MIN +#define INT32_MIN (-0x7fffffff-1) +#endif + +#ifndef INT32_MAX +#define INT32_MAX 0x7fffffff +#endif + +#ifndef UINT32_MAX +#define UINT32_MAX 0xffffffff +#endif + +#ifndef INT64_MIN +#define INT64_MIN (-0x7fffffffffffffffLL-1) +#endif + +#ifndef INT64_MAX +#define INT64_MAX int64_t_C(9223372036854775807) +#endif + +#ifndef UINT64_MAX +#define UINT64_MAX uint64_t_C(0xFFFFFFFFFFFFFFFF) +#endif + +#ifndef INT_BIT +# if INT_MAX != 2147483647 +# define INT_BIT 64 +# else +# define INT_BIT 32 +# endif +#endif + +#ifndef int64_t_C +#define int64_t_C(c) (c ## LL) +#define uint64_t_C(c) (c ## ULL) +#endif + +#if defined(__MINGW32__) && !defined(BUILD_AVUTIL) && defined(BUILD_SHARED_AV) +# define FF_IMPORT_ATTR __declspec(dllimport) +#else +# define FF_IMPORT_ATTR +#endif + + +#ifdef HAVE_AV_CONFIG_H +/* only include the following when compiling package */ +# include "internal.h" +#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 FF_IMPORT_ATTR 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) +{ +#if 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 cliped 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 cliped 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 < 8*tsum/tcount){\ + 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 */ |