2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 * common internal and external api header.
30 #define M_PI 3.14159265358979323846
33 #ifdef HAVE_AV_CONFIG_H
34 /* only include the following when compiling package */
48 #endif /* HAVE_AV_CONFIG_H */
50 /* Suppress restrict if it was not defined in config.h. */
56 #if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
57 # define always_inline __attribute__((always_inline)) inline
59 # define always_inline inline
63 #ifndef attribute_used
64 #if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
65 # define attribute_used __attribute__((used))
67 # define attribute_used
71 #ifndef attribute_unused
72 #if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
73 # define attribute_unused __attribute__((unused))
75 # define attribute_unused
79 #ifndef attribute_deprecated
80 #if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
81 # define attribute_deprecated __attribute__((deprecated))
83 # define attribute_deprecated
87 #ifndef EMULATE_INTTYPES
88 # include <inttypes.h>
90 typedef signed char int8_t;
91 typedef signed short int16_t;
92 typedef signed int int32_t;
93 typedef unsigned char uint8_t;
94 typedef unsigned short uint16_t;
95 typedef unsigned int uint32_t;
96 typedef signed long long int64_t;
97 typedef unsigned long long uint64_t;
98 #endif /* EMULATE_INTTYPES */
121 #define PRIdFAST16 PRId32
125 #define PRIdFAST32 PRId32
129 #define INT16_MIN (-0x7fff-1)
133 #define INT16_MAX 0x7fff
137 #define INT32_MIN (-0x7fffffff-1)
141 #define INT32_MAX 0x7fffffff
145 #define UINT32_MAX 0xffffffff
149 #define INT64_MIN (-0x7fffffffffffffffLL-1)
153 #define INT64_MAX int64_t_C(9223372036854775807)
157 #define UINT64_MAX uint64_t_C(0xFFFFFFFFFFFFFFFF)
160 #ifdef EMULATE_FAST_INT
161 typedef signed char int_fast8_t;
162 typedef signed int int_fast16_t;
163 typedef signed int int_fast32_t;
164 typedef unsigned char uint_fast8_t;
165 typedef unsigned int uint_fast16_t;
166 typedef unsigned int uint_fast32_t;
167 typedef uint64_t uint_fast64_t;
171 # if INT_MAX != 2147483647
179 #define int64_t_C(c) (c ## LL)
180 #define uint64_t_C(c) (c ## ULL)
183 #if defined(__MINGW32__) && !defined(BUILD_AVUTIL) && defined(BUILD_SHARED_AV)
184 # define FF_IMPORT_ATTR __declspec(dllimport)
186 # define FF_IMPORT_ATTR
190 #ifdef HAVE_AV_CONFIG_H
191 /* only include the following when compiling package */
192 # include "internal.h"
195 //rounded divison & shift
196 #define RSHIFT(a,b) ((a) > 0 ? ((a) + ((1<<(b))>>1))>>(b) : ((a) + ((1<<(b))>>1)-1)>>(b))
198 #define ROUNDED_DIV(a,b) (((a)>0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))
199 #define FFABS(a) ((a) >= 0 ? (a) : (-(a)))
200 #define FFSIGN(a) ((a) > 0 ? 1 : -1)
202 #define FFMAX(a,b) ((a) > (b) ? (a) : (b))
203 #define FFMIN(a,b) ((a) > (b) ? (b) : (a))
205 #define FFSWAP(type,a,b) do{type SWAP_tmp= b; b= a; a= SWAP_tmp;}while(0)
207 /* misc math functions */
208 extern FF_IMPORT_ATTR const uint8_t ff_log2_tab[256];
210 static inline int av_log2(unsigned int v)
215 if (v & 0xffff0000) {
228 static inline int av_log2_16bit(unsigned int v)
243 static inline int mid_pred(int a, int b, int c)
260 int t= (a-b)&((a-b)>>31);
263 b-= (b-c)&((b-c)>>31);
264 b+= (a-b)&((a-b)>>31);
284 * clip a signed integer value into the amin-amax range
285 * @param a value to clip
286 * @param amin minimum value of the clip range
287 * @param amax maximum value of the clip range
288 * @return cliped value
290 static inline int clip(int a, int amin, int amax)
292 if (a < amin) return amin;
293 else if (a > amax) return amax;
298 * clip a signed integer value into the 0-255 range
299 * @param a value to clip
300 * @return cliped value
302 static inline uint8_t clip_uint8(int a)
304 if (a&(~255)) return (-a)>>31;
309 int64_t ff_gcd(int64_t a, int64_t b);
312 * converts fourcc string to int
314 static inline int ff_get_fourcc(const char *s){
315 #ifdef HAVE_AV_CONFIG_H
316 assert( strlen(s)==4 );
319 return (s[0]) + (s[1]<<8) + (s[2]<<16) + (s[3]<<24);
322 #define MKTAG(a,b,c,d) (a | (b << 8) | (c << 16) | (d << 24))
323 #define MKBETAG(a,b,c,d) (d | (c << 8) | (b << 16) | (a << 24))
325 #define GET_UTF8(val, GET_BYTE, ERROR)\
328 int ones= 7 - av_log2(val ^ 255);\
333 int tmp= GET_BYTE - 128;\
336 val= (val<<6) + tmp;\
341 * \def PUT_UTF8(val, tmp, PUT_BYTE)
342 * converts a 32-bit unicode character to its utf-8 encoded form (up to 6 bytes long).
343 * \param val is an input only argument and should be of type uint32_t. It holds
344 * a ucs4 encoded unicode character that is to be converted to utf-8. If
345 * val is given as a function it's executed only once.
346 * \param tmp is a temporary variable and should be of type uint8_t. It
347 * represents an intermediate value during conversion that is to be
348 * outputted by PUT_BYTE.
349 * \param PUT_BYTE writes the converted utf-8 bytes to any proper destination.
350 * It could be a function or a statement, and uses tmp as the input byte.
351 * For example, PUT_BYTE could be "*output++ = tmp;" PUT_BYTE will be
352 * executed up to 6 times, depending on the length of the converted
355 #define PUT_UTF8(val, tmp, PUT_BYTE)\
363 bytes = (av_log2(in) + 4) / 5;\
364 shift = (bytes - 1) * 6;\
365 tmp = (256 - (256 >> bytes)) | (in >> shift);\
367 while (shift >= 6) {\
369 tmp = 0x80 | ((in >> shift) & 0x3f);\
375 #if defined(ARCH_X86) || defined(ARCH_POWERPC)
376 #if defined(ARCH_X86_64)
377 static inline uint64_t read_time(void)
380 asm volatile( "rdtsc\n\t"
383 return (d << 32) | (a & 0xffffffff);
385 #elif defined(ARCH_X86_32)
386 static inline long long read_time(void)
389 asm volatile( "rdtsc\n\t"
394 #else //FIXME check ppc64
395 static inline uint64_t read_time(void)
397 uint32_t tbu, tbl, temp;
399 /* from section 2.2.1 of the 32-bit PowerPC PEM */
400 __asm__ __volatile__(
407 : "=r"(tbl), "=r"(tbu), "=r"(temp)
411 return (((uint64_t)tbu)<<32) | (uint64_t)tbl;
415 #define START_TIMER \
417 uint64_t tstart= read_time();\
419 #define STOP_TIMER(id) \
422 static uint64_t tsum=0;\
423 static int tcount=0;\
424 static int tskip_count=0;\
425 if(tcount<2 || tend - tstart < 8*tsum/tcount){\
426 tsum+= tend - tstart;\
430 if(((tcount+tskip_count)&(tcount+tskip_count-1))==0){\
431 av_log(NULL, AV_LOG_DEBUG, "%"PRIu64" dezicycles in %s, %d runs, %d skips\n", tsum*10/tcount, id, tcount, tskip_count);\
436 #define STOP_TIMER(id) {}
442 #define DECLARE_ALIGNED(n,t,v) t v __attribute__ ((aligned (n)))
444 #define DECLARE_ALIGNED(n,t,v) __declspec(align(n)) t v
448 void *av_malloc(unsigned int size);
449 void *av_realloc(void *ptr, unsigned int size);
450 void av_free(void *ptr);
452 void *av_mallocz(unsigned int size);
453 char *av_strdup(const char *s);
454 void av_freep(void *ptr);
456 #endif /* COMMON_H */