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FFmpeg/libavutil/common.h

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  1. /**

  2.  * @file common.h

  3.  * common internal api header.

  4.  */

  5. 

  6. #ifndef COMMON_H

  7. #define COMMON_H

  8. 

  9. #if defined(WIN32) && !defined(__MINGW32__) && !defined(__CYGWIN__)

  10. #    define CONFIG_WIN32

  11. #endif

  12. 

  13. #ifndef M_PI

  14. #define M_PI    3.14159265358979323846

  15. #endif

  16. 

  17. #ifdef HAVE_AV_CONFIG_H

  18. /* only include the following when compiling package */

  19. #    include "config.h"

  20. 

  21. #    include <stdlib.h>

  22. #    include <stdio.h>

  23. #    include <string.h>

  24. #    include <ctype.h>

  25. #    include <limits.h>

  26. #    ifndef __BEOS__

  27. #        include <errno.h>

  28. #    else

  29. #        include "berrno.h"

  30. #    endif

  31. #    include <math.h>

  32. 

  33. #    ifndef ENODATA

  34. #        define ENODATA  61

  35. #    endif

  36. 

  37. #include <stddef.h>

  38. #ifndef offsetof

  39. # define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F))

  40. #endif

  41. 

  42. #define AVOPTION_CODEC_BOOL(name, help, field) \

  43.     { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_BOOL }

  44. #define AVOPTION_CODEC_DOUBLE(name, help, field, minv, maxv, defval) \

  45.     { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_DOUBLE, minv, maxv, defval }

  46. #define AVOPTION_CODEC_FLAG(name, help, field, flag, defval) \

  47.     { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_FLAG, flag, 0, defval }

  48. #define AVOPTION_CODEC_INT(name, help, field, minv, maxv, defval) \

  49.     { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_INT, minv, maxv, defval }

  50. #define AVOPTION_CODEC_STRING(name, help, field, str, val) \

  51.     { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_STRING, .defval = val, .defstr = str }

  52. #define AVOPTION_CODEC_RCOVERRIDE(name, help, field) \

  53.     { name, help, offsetof(AVCodecContext, field), FF_OPT_TYPE_RCOVERRIDE, .defval = 0, .defstr = NULL }

  54. #define AVOPTION_SUB(ptr) { .name = NULL, .help = (const char*)ptr }

  55. #define AVOPTION_END() AVOPTION_SUB(NULL)

  56. 

  57. #endif /* HAVE_AV_CONFIG_H */

  58. 

  59. /* Suppress restrict if it was not defined in config.h.  */

  60. #ifndef restrict

  61. #    define restrict

  62. #endif

  63. 

  64. #ifndef always_inline

  65. #if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)

  66. #    define always_inline __attribute__((always_inline)) inline

  67. #else

  68. #    define always_inline inline

  69. #endif

  70. #endif

  71. 

  72. #ifndef attribute_used

  73. #if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)

  74. #    define attribute_used __attribute__((used))

  75. #else

  76. #    define attribute_used

  77. #endif

  78. #endif

  79. 

  80. #ifndef attribute_unused

  81. #if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)

  82. #    define attribute_unused __attribute__((unused))

  83. #else

  84. #    define attribute_unused

  85. #endif

  86. #endif

  87. 

  88. #ifndef EMULATE_INTTYPES

  89. #   include <inttypes.h>

  90. #else

  91.     typedef signed char  int8_t;

  92.     typedef signed short int16_t;

  93.     typedef signed int   int32_t;

  94.     typedef unsigned char  uint8_t;

  95.     typedef unsigned short uint16_t;

  96.     typedef unsigned int   uint32_t;

  97. 

  98. #   ifdef CONFIG_WIN32

  99.         typedef signed __int64   int64_t;

  100.         typedef unsigned __int64 uint64_t;

  101. #   else /* other OS */

  102.         typedef signed long long   int64_t;

  103.         typedef unsigned long long uint64_t;

  104. #   endif /* other OS */

  105. #endif /* HAVE_INTTYPES_H */

  106. 

  107. #ifndef INT16_MIN

  108. #define INT16_MIN       (-0x7fff-1)

  109. #endif

  110. 

  111. #ifndef INT16_MAX

  112. #define INT16_MAX       0x7fff

  113. #endif

  114. 

  115. #ifndef INT64_MIN

  116. #define INT64_MIN       (-0x7fffffffffffffffLL-1)

  117. #endif

  118. 

  119. #ifndef INT64_MAX

  120. #define INT64_MAX int64_t_C(9223372036854775807)

  121. #endif

  122. 

  123. #ifndef UINT64_MAX

  124. #define UINT64_MAX uint64_t_C(0xFFFFFFFFFFFFFFFF)

  125. #endif

  126. 

  127. #ifdef EMULATE_FAST_INT

  128. typedef signed char int_fast8_t;

  129. typedef signed int  int_fast16_t;

  130. typedef signed int  int_fast32_t;

  131. typedef unsigned char uint_fast8_t;

  132. typedef unsigned int  uint_fast16_t;

  133. typedef unsigned int  uint_fast32_t;

  134. typedef uint64_t      uint_fast64_t;

  135. #endif

  136. 

  137. #ifndef INT_BIT

  138. #    if INT_MAX != 2147483647

  139. #        define INT_BIT 64

  140. #    else

  141. #        define INT_BIT 32

  142. #    endif

  143. #endif

  144. 

  145. #if defined(CONFIG_OS2) || defined(CONFIG_SUNOS)

  146. static inline float floorf(float f) { 

  147.     return floor(f); 

  148. }

  149. #endif

  150. 

  151. #ifdef CONFIG_WIN32

  152. 

  153. /* windows */

  154. 

  155. #    if !defined(__MINGW32__) && !defined(__CYGWIN__)

  156. #        define int64_t_C(c)     (c ## i64)

  157. #        define uint64_t_C(c)    (c ## i64)

  158. 

  159. #    ifdef HAVE_AV_CONFIG_H

  160. #            define inline __inline

  161. #    endif

  162. 

  163. #    else

  164. #        define int64_t_C(c)     (c ## LL)

  165. #        define uint64_t_C(c)    (c ## ULL)

  166. #    endif /* __MINGW32__ */

  167. 

  168. #    ifdef HAVE_AV_CONFIG_H

  169. #        ifdef _DEBUG

  170. #            define DEBUG

  171. #        endif

  172. 

  173. #        define snprintf _snprintf

  174. #        define vsnprintf _vsnprintf

  175. #    endif

  176. 

  177. /* CONFIG_WIN32 end */

  178. #elif defined (CONFIG_OS2)

  179. /* OS/2 EMX */

  180. 

  181. #ifndef int64_t_C

  182. #define int64_t_C(c)     (c ## LL)

  183. #define uint64_t_C(c)    (c ## ULL)

  184. #endif

  185. 

  186. #ifdef HAVE_AV_CONFIG_H

  187. 

  188. #ifdef USE_FASTMEMCPY

  189. #include "fastmemcpy.h"

  190. #endif

  191. 

  192. #include <float.h>

  193. 

  194. #endif /* HAVE_AV_CONFIG_H */

  195. 

  196. /* CONFIG_OS2 end */

  197. #else

  198. 

  199. /* unix */

  200. 

  201. #ifndef int64_t_C

  202. #define int64_t_C(c)     (c ## LL)

  203. #define uint64_t_C(c)    (c ## ULL)

  204. #endif

  205. 

  206. #ifdef HAVE_AV_CONFIG_H

  207. 

  208. #        ifdef USE_FASTMEMCPY

  209. #            include "fastmemcpy.h"

  210. #        endif

  211. #    endif /* HAVE_AV_CONFIG_H */

  212. 

  213. #endif /* !CONFIG_WIN32 && !CONFIG_OS2 */

  214. 

  215. #ifdef HAVE_AV_CONFIG_H

  216. 

  217. #    include "bswap.h"

  218. 

  219. // Use rip-relative addressing if compiling PIC code on x86-64.

  220. #    if defined(__MINGW32__) || defined(__CYGWIN__) || \

  221.         defined(__OS2__) || (defined (__OpenBSD__) && !defined(__ELF__))

  222. #        if defined(ARCH_X86_64) && defined(PIC)

  223. #            define MANGLE(a) "_" #a"(%%rip)"

  224. #        else

  225. #            define MANGLE(a) "_" #a

  226. #        endif

  227. #    else

  228. #        if defined(ARCH_X86_64) && defined(PIC)

  229. #            define MANGLE(a) #a"(%%rip)"

  230. #        else

  231. #            define MANGLE(a) #a

  232. #        endif

  233. #    endif

  234. 

  235. /* debug stuff */

  236. 

  237. #    ifndef DEBUG

  238. #        define NDEBUG

  239. #    endif

  240. #    include <assert.h>

  241. 

  242. /* dprintf macros */

  243. #    if defined(CONFIG_WIN32) && !defined(__MINGW32__) && !defined(__CYGWIN__)

  244. 

  245. inline void dprintf(const char* fmt,...) {}

  246. 

  247. #    else

  248. 

  249. #        ifdef DEBUG

  250. #            define dprintf(fmt,...) av_log(NULL, AV_LOG_DEBUG, fmt, __VA_ARGS__)

  251. #        else

  252. #            define dprintf(fmt,...)

  253. #        endif

  254. 

  255. #    endif /* !CONFIG_WIN32 */

  256. 

  257. #    define av_abort()      do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)

  258. 

  259. //rounded divison & shift

  260. #define RSHIFT(a,b) ((a) > 0 ? ((a) + ((1<<(b))>>1))>>(b) : ((a) + ((1<<(b))>>1)-1)>>(b))

  261. /* assume b>0 */

  262. #define ROUNDED_DIV(a,b) (((a)>0 ? (a) + ((b)>>1) : (a) - ((b)>>1))/(b))

  263. #define ABS(a) ((a) >= 0 ? (a) : (-(a)))

  264. 

  265. #define FFMAX(a,b) ((a) > (b) ? (a) : (b))

  266. #define FFMIN(a,b) ((a) > (b) ? (b) : (a))

  267. 

  268. extern const uint32_t inverse[256];

  269. 

  270. #if defined(ARCH_X86) || defined(ARCH_X86_64)

  271. #    define FASTDIV(a,b) \

  272.     ({\

  273.         int ret,dmy;\

  274.         asm volatile(\

  275.             "mull %3"\

  276.             :"=d"(ret),"=a"(dmy)\

  277.             :"1"(a),"g"(inverse[b])\

  278.             );\

  279.         ret;\

  280.     })

  281. #elif defined(CONFIG_FASTDIV)

  282. #    define FASTDIV(a,b)   ((uint32_t)((((uint64_t)a)*inverse[b])>>32))

  283. #else

  284. #    define FASTDIV(a,b)   ((a)/(b))

  285. #endif

  286.  

  287. /* define it to include statistics code (useful only for optimizing

  288.    codec efficiency */

  289. //#define STATS

  290. 

  291. #ifdef STATS

  292. 

  293. enum {

  294.     ST_UNKNOWN,

  295.     ST_DC,

  296.     ST_INTRA_AC,

  297.     ST_INTER_AC,

  298.     ST_INTRA_MB,

  299.     ST_INTER_MB,

  300.     ST_MV,

  301.     ST_NB,

  302. };

  303. 

  304. extern int st_current_index;

  305. extern unsigned int st_bit_counts[ST_NB];

  306. extern unsigned int st_out_bit_counts[ST_NB];

  307. 

  308. void print_stats(void);

  309. #endif

  310. 

  311. /* misc math functions */

  312. extern const uint8_t ff_log2_tab[256];

  313. 

  314. static inline int av_log2(unsigned int v)

  315. {

  316.     int n;

  317. 

  318.     n = 0;

  319.     if (v & 0xffff0000) {

  320.         v >>= 16;

  321.         n += 16;

  322.     }

  323.     if (v & 0xff00) {

  324.         v >>= 8;

  325.         n += 8;

  326.     }

  327.     n += ff_log2_tab[v];

  328. 

  329.     return n;

  330. }

  331. 

  332. static inline int av_log2_16bit(unsigned int v)

  333. {

  334.     int n;

  335. 

  336.     n = 0;

  337.     if (v & 0xff00) {

  338.         v >>= 8;

  339.         n += 8;

  340.     }

  341.     n += ff_log2_tab[v];

  342. 

  343.     return n;

  344. }

  345. 

  346. /* median of 3 */

  347. static inline int mid_pred(int a, int b, int c)

  348. {

  349. #if 0

  350.     int t= (a-b)&((a-b)>>31);

  351.     a-=t;

  352.     b+=t;

  353.     b-= (b-c)&((b-c)>>31);

  354.     b+= (a-b)&((a-b)>>31);

  355. 

  356.     return b;

  357. #else

  358.     if(a>b){

  359.         if(c>b){

  360.             if(c>a) b=a;

  361.             else    b=c;

  362.         }

  363.     }else{

  364.         if(b>c){

  365.             if(c>a) b=c;

  366.             else    b=a;

  367.         }

  368.     }

  369.     return b;

  370. #endif

  371. }

  372. 

  373. static inline int clip(int a, int amin, int amax)

  374. {

  375.     if (a < amin)

  376.         return amin;

  377.     else if (a > amax)

  378.         return amax;

  379.     else

  380.         return a;

  381. }

  382. 

  383. static inline int clip_uint8(int a)

  384. {

  385.     if (a&(~255)) return (-a)>>31;

  386.     else          return a;

  387. }

  388. 

  389. /* math */

  390. extern const uint8_t ff_sqrt_tab[128];

  391. 

  392. int64_t ff_gcd(int64_t a, int64_t b);

  393. 

  394. static inline int ff_sqrt(int a)

  395. {

  396.     int ret=0;

  397.     int s;

  398.     int ret_sq=0;

  399.     

  400.     if(a<128) return ff_sqrt_tab[a];

  401.     

  402.     for(s=15; s>=0; s--){

  403.         int b= ret_sq + (1<<(s*2)) + (ret<<s)*2;

  404.         if(b<=a){

  405.             ret_sq=b;

  406.             ret+= 1<<s;

  407.         }

  408.     }

  409.     return ret;

  410. }

  411. 

  412. /**

  413.  * converts fourcc string to int

  414.  */

  415. static inline int ff_get_fourcc(const char *s){

  416.     assert( strlen(s)==4 );

  417. 

  418.     return (s[0]) + (s[1]<<8) + (s[2]<<16) + (s[3]<<24);

  419. }

  420. 

  421. #define MKTAG(a,b,c,d) (a | (b << 8) | (c << 16) | (d << 24))

  422. #define MKBETAG(a,b,c,d) (d | (c << 8) | (b << 16) | (a << 24))

  423. 

  424. 

  425. #if defined(ARCH_X86) || defined(ARCH_X86_64)

  426. #define MASK_ABS(mask, level)\

  427.             asm volatile(\

  428. 		"cdq			\n\t"\

  429. 		"xorl %1, %0		\n\t"\

  430. 		"subl %1, %0		\n\t"\

  431. 		: "+a" (level), "=&d" (mask)\

  432. 	    );

  433. #else

  434. #define MASK_ABS(mask, level)\

  435.             mask= level>>31;\

  436.             level= (level^mask)-mask;

  437. #endif

  438. 

  439. 

  440. #if __CPU__ >= 686 && !defined(RUNTIME_CPUDETECT)

  441. #define COPY3_IF_LT(x,y,a,b,c,d)\

  442. asm volatile (\

  443.     "cmpl %0, %3	\n\t"\

  444.     "cmovl %3, %0	\n\t"\

  445.     "cmovl %4, %1	\n\t"\

  446.     "cmovl %5, %2	\n\t"\

  447.     : "+r" (x), "+r" (a), "+r" (c)\

  448.     : "r" (y), "r" (b), "r" (d)\

  449. );

  450. #else

  451. #define COPY3_IF_LT(x,y,a,b,c,d)\

  452. if((y)<(x)){\

  453.      (x)=(y);\

  454.      (a)=(b);\

  455.      (c)=(d);\

  456. }

  457. #endif

  458. 

  459. #if defined(ARCH_X86) || defined(ARCH_X86_64) || defined(ARCH_POWERPC)

  460. #if defined(ARCH_X86_64)

  461. static inline uint64_t read_time(void)

  462. {

  463. 	uint64_t a, d;

  464. 	asm volatile(	"rdtsc\n\t"

  465. 		: "=a" (a), "=d" (d)

  466. 	);

  467. 	return (d << 32) | (a & 0xffffffff);

  468. }

  469. #elif defined(ARCH_X86)

  470. static inline long long read_time(void)

  471. {

  472. 	long long l;

  473. 	asm volatile(	"rdtsc\n\t"

  474. 		: "=A" (l)

  475. 	);

  476. 	return l;

  477. }

  478. #else //FIXME check ppc64

  479. static inline uint64_t read_time(void)

  480. {

  481.     uint32_t tbu, tbl, temp;

  482. 

  483.      /* from section 2.2.1 of the 32-bit PowerPC PEM */

  484.      __asm__ __volatile__(

  485.          "1:\n"

  486.          "mftbu  %2\n"

  487.          "mftb   %0\n"

  488.          "mftbu  %1\n"

  489.          "cmpw   %2,%1\n"

  490.          "bne    1b\n"

  491.      : "=r"(tbl), "=r"(tbu), "=r"(temp)

  492.      :

  493.      : "cc");

  494. 

  495.      return (((uint64_t)tbu)<<32) | (uint64_t)tbl;

  496. }

  497. #endif

  498. 

  499. #define START_TIMER \

  500. uint64_t tend;\

  501. uint64_t tstart= read_time();\

  502. 

  503. #define STOP_TIMER(id) \

  504. tend= read_time();\

  505. {\

  506.   static uint64_t tsum=0;\

  507.   static int tcount=0;\

  508.   static int tskip_count=0;\

  509.   if(tcount<2 || tend - tstart < 8*tsum/tcount){\

  510.       tsum+= tend - tstart;\

  511.       tcount++;\

  512.   }else\

  513.       tskip_count++;\

  514.   if(256*256*256*64%(tcount+tskip_count)==0){\

  515.       av_log(NULL, AV_LOG_DEBUG, "%Ld dezicycles in %s, %d runs, %d skips\n", tsum*10/tcount, id, tcount, tskip_count);\

  516.   }\

  517. }

  518. #else

  519. #define START_TIMER 

  520. #define STOP_TIMER(id) {}

  521. #endif

  522. 

  523. /* avoid usage of various functions */

  524. #define malloc please_use_av_malloc

  525. #define free please_use_av_free

  526. #define realloc please_use_av_realloc

  527. #define time time_is_forbidden_due_to_security_issues

  528. #define rand rand_is_forbidden_due_to_state_trashing

  529. #define srand srand_is_forbidden_due_to_state_trashing

  530. #define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf

  531. #define strcat strcat_is_forbidden_due_to_security_issues_use_pstrcat

  532. #if !(defined(LIBAVFORMAT_BUILD) || defined(_FRAMEHOOK_H))

  533. #define printf please_use_av_log

  534. #define fprintf please_use_av_log

  535. #endif

  536. 

  537. #define CHECKED_ALLOCZ(p, size)\

  538. {\

  539.     p= av_mallocz(size);\

  540.     if(p==NULL && (size)!=0){\

  541.         perror("malloc");\

  542.         goto fail;\

  543.     }\

  544. }

  545. 

  546. #endif /* HAVE_AV_CONFIG_H */

  547. 

  548. #endif /* COMMON_H */