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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. #ifndef M_PI

  10. #define M_PI    3.14159265358979323846

  11. #endif

  12. 

  13. #if ( defined(__PIC__) || defined(__pic__) ) && ! defined(PIC)

  14. #    define PIC

  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.     typedef signed long long   int64_t;

  98.     typedef unsigned long long uint64_t;

  99. #endif /* EMULATE_INTTYPES */

  100. 

  101. #ifndef PRId64

  102. #define PRId64 "lld"

  103. #endif

  104. 

  105. #ifndef PRIu64

  106. #define PRIu64 "llu"

  107. #endif

  108. 

  109. #ifndef PRIx64

  110. #define PRIx64 "llx"

  111. #endif

  112. 

  113. #ifndef PRId32

  114. #define PRId32 "d"

  115. #endif

  116. 

  117. #ifndef PRIdFAST16

  118. #define PRIdFAST16 PRId32

  119. #endif

  120. 

  121. #ifndef PRIdFAST32

  122. #define PRIdFAST32 PRId32

  123. #endif

  124. 

  125. #ifndef INT16_MIN

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

  127. #endif

  128. 

  129. #ifndef INT16_MAX

  130. #define INT16_MAX       0x7fff

  131. #endif

  132. 

  133. #ifndef INT32_MIN

  134. #define INT32_MIN       (-0x7fffffff-1)

  135. #endif

  136. 

  137. #ifndef INT32_MAX

  138. #define INT32_MAX       0x7fffffff

  139. #endif

  140. 

  141. #ifndef UINT32_MAX

  142. #define UINT32_MAX      0xffffffff

  143. #endif

  144. 

  145. #ifndef INT64_MIN

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

  147. #endif

  148. 

  149. #ifndef INT64_MAX

  150. #define INT64_MAX int64_t_C(9223372036854775807)

  151. #endif

  152. 

  153. #ifndef UINT64_MAX

  154. #define UINT64_MAX uint64_t_C(0xFFFFFFFFFFFFFFFF)

  155. #endif

  156. 

  157. #ifdef EMULATE_FAST_INT

  158. typedef signed char int_fast8_t;

  159. typedef signed int  int_fast16_t;

  160. typedef signed int  int_fast32_t;

  161. typedef unsigned char uint_fast8_t;

  162. typedef unsigned int  uint_fast16_t;

  163. typedef unsigned int  uint_fast32_t;

  164. typedef uint64_t      uint_fast64_t;

  165. #endif

  166. 

  167. #ifndef INT_BIT

  168. #    if INT_MAX != 2147483647

  169. #        define INT_BIT 64

  170. #    else

  171. #        define INT_BIT 32

  172. #    endif

  173. #endif

  174. 

  175. #ifdef __MINGW32__

  176. 

  177. /* windows */

  178. 

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

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

  181. 

  182. #    ifdef HAVE_AV_CONFIG_H

  183. #        ifdef _DEBUG

  184. #            define DEBUG

  185. #        endif

  186. 

  187. #        define snprintf _snprintf

  188. #        define vsnprintf _vsnprintf

  189. 

  190. #        ifdef CONFIG_WINCE

  191. #            define perror(a)

  192. #        endif

  193. 

  194. #    endif

  195. 

  196. /* __MINGW32__ end */

  197. #elif defined (CONFIG_OS2)

  198. /* OS/2 EMX */

  199. 

  200. #ifndef int64_t_C

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

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

  203. #endif

  204. 

  205. #ifdef HAVE_AV_CONFIG_H

  206. 

  207. #ifdef USE_FASTMEMCPY

  208. #include "fastmemcpy.h"

  209. #endif

  210. 

  211. #include <float.h>

  212. 

  213. #endif /* HAVE_AV_CONFIG_H */

  214. 

  215. /* CONFIG_OS2 end */

  216. #else

  217. 

  218. /* unix */

  219. 

  220. #ifndef int64_t_C

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

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

  223. #endif

  224. 

  225. #ifdef HAVE_AV_CONFIG_H

  226. 

  227. #        ifdef USE_FASTMEMCPY

  228. #            include "fastmemcpy.h"

  229. #        endif

  230. #    endif /* HAVE_AV_CONFIG_H */

  231. 

  232. #endif /* !__MINGW32__ && !CONFIG_OS2 */

  233. 

  234. #ifdef HAVE_AV_CONFIG_H

  235. 

  236. #if defined(__MINGW32__) && !defined(BUILD_AVUTIL) && defined(BUILD_SHARED_AV)

  237. #  define FF_IMPORT_ATTR __declspec(dllimport)

  238. #else

  239. #  define FF_IMPORT_ATTR

  240. #endif

  241. 

  242. 

  243. #    include "bswap.h"

  244. 

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

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

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

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

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

  250. #        else

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

  252. #        endif

  253. #    else

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

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

  256. #        elif defined(CONFIG_DARWIN)

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

  258. #        else

  259. #            define MANGLE(a) #a

  260. #        endif

  261. #    endif

  262. 

  263. /* debug stuff */

  264. 

  265. #    if !defined(DEBUG) && !defined(NDEBUG)

  266. #        define NDEBUG

  267. #    endif

  268. #    include <assert.h>

  269. 

  270. /* dprintf macros */

  271. #    ifdef DEBUG

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

  273. #    else

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

  275. #    endif

  276. 

  277. #    ifdef CONFIG_WINCE

  278. #            define abort()

  279. #    endif

  280. 

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

  282. 

  283. //rounded divison & shift

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

  285. /* assume b>0 */

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

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

  288. 

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

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

  291. 

  292. extern const uint32_t inverse[256];

  293. 

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

  295. #    define FASTDIV(a,b) \

  296.     ({\

  297.         int ret,dmy;\

  298.         asm volatile(\

  299.             "mull %3"\

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

  301.             :"1"(a),"g"(inverse[b])\

  302.             );\

  303.         ret;\

  304.     })

  305. #elif defined(CONFIG_FASTDIV)

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

  307. #else

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

  309. #endif

  310. 

  311. /* misc math functions */

  312. extern FF_IMPORT_ATTR 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. /**

  374.  * clip a signed integer value into the amin-amax range

  375.  * @param a value to clip

  376.  * @param amin minimum value of the clip range

  377.  * @param amax maximum value of the clip range

  378.  * @return cliped value

  379.  */

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

  381. {

  382.     if (a < amin)      return amin;

  383.     else if (a > amax) return amax;

  384.     else               return a;

  385. }

  386. 

  387. /**

  388.  * clip a signed integer value into the 0-255 range

  389.  * @param a value to clip

  390.  * @return cliped value

  391.  */

  392. static inline uint8_t clip_uint8(int a)

  393. {

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

  395.     else          return a;

  396. }

  397. 

  398. /* math */

  399. extern FF_IMPORT_ATTR const uint8_t ff_sqrt_tab[128];

  400. 

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

  402. 

  403. static inline int ff_sqrt(int a)

  404. {

  405.     int ret=0;

  406.     int s;

  407.     int ret_sq=0;

  408. 

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

  410. 

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

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

  413.         if(b<=a){

  414.             ret_sq=b;

  415.             ret+= 1<<s;

  416.         }

  417.     }

  418.     return ret;

  419. }

  420. 

  421. /**

  422.  * converts fourcc string to int

  423.  */

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

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

  426. 

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

  428. }

  429. 

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

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

  432. 

  433. 

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

  435. #define MASK_ABS(mask, level)\

  436.             asm volatile(\

  437.                 "cdq                    \n\t"\

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

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

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

  441.             );

  442. #else

  443. #define MASK_ABS(mask, level)\

  444.             mask= level>>31;\

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

  446. #endif

  447. 

  448. #define GET_UTF8(val, GET_BYTE, ERROR)\

  449.     val= GET_BYTE;\

  450.     {\

  451.         int ones= 7 - av_log2(val ^ 255);\

  452.         if(ones==1)\

  453.             ERROR\

  454.         val&= 127>>ones;\

  455.         while(--ones > 0){\

  456.             int tmp= GET_BYTE - 128;\

  457.             if(tmp>>6)\

  458.                 ERROR\

  459.             val= (val<<6) + tmp;\

  460.         }\

  461.     }

  462. 

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

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

  465. asm volatile (\

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

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

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

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

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

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

  472. );

  473. #else

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

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

  476.      (x)=(y);\

  477.      (a)=(b);\

  478.      (c)=(d);\

  479. }

  480. #endif

  481. 

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

  483. #if defined(ARCH_X86_64)

  484. static inline uint64_t read_time(void)

  485. {

  486.         uint64_t a, d;

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

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

  489.         );

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

  491. }

  492. #elif defined(ARCH_X86)

  493. static inline long long read_time(void)

  494. {

  495.         long long l;

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

  497.                 : "=A" (l)

  498.         );

  499.         return l;

  500. }

  501. #else //FIXME check ppc64

  502. static inline uint64_t read_time(void)

  503. {

  504.     uint32_t tbu, tbl, temp;

  505. 

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

  507.      __asm__ __volatile__(

  508.          "1:\n"

  509.          "mftbu  %2\n"

  510.          "mftb   %0\n"

  511.          "mftbu  %1\n"

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

  513.          "bne    1b\n"

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

  515.      :

  516.      : "cc");

  517. 

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

  519. }

  520. #endif

  521. 

  522. #define START_TIMER \

  523. uint64_t tend;\

  524. uint64_t tstart= read_time();\

  525. 

  526. #define STOP_TIMER(id) \

  527. tend= read_time();\

  528. {\

  529.   static uint64_t tsum=0;\

  530.   static int tcount=0;\

  531.   static int tskip_count=0;\

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

  533.       tsum+= tend - tstart;\

  534.       tcount++;\

  535.   }else\

  536.       tskip_count++;\

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

  538.       av_log(NULL, AV_LOG_DEBUG, "%"PRIu64" dezicycles in %s, %d runs, %d skips\n", tsum*10/tcount, id, tcount, tskip_count);\

  539.   }\

  540. }

  541. #else

  542. #define START_TIMER

  543. #define STOP_TIMER(id) {}

  544. #endif

  545. 

  546. /* avoid usage of various functions */

  547. #define malloc please_use_av_malloc

  548. #define free please_use_av_free

  549. #define realloc please_use_av_realloc

  550. #define time time_is_forbidden_due_to_security_issues

  551. #define rand rand_is_forbidden_due_to_state_trashing

  552. #define srand srand_is_forbidden_due_to_state_trashing

  553. #define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf

  554. #define strcat strcat_is_forbidden_due_to_security_issues_use_pstrcat

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

  556. #define printf please_use_av_log

  557. #define fprintf please_use_av_log

  558. #endif

  559. 

  560. #define CHECKED_ALLOCZ(p, size)\

  561. {\

  562.     p= av_mallocz(size);\

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

  564.         perror("malloc");\

  565.         goto fail;\

  566.     }\

  567. }

  568. 

  569. #ifndef HAVE_LRINTF

  570. /* XXX: add ISOC specific test to avoid specific BSD testing. */

  571. /* better than nothing implementation. */

  572. /* btw, rintf() is existing on fbsd too -- alex */

  573. static always_inline long int lrintf(float x)

  574. {

  575. #ifdef __MINGW32__

  576. #  ifdef ARCH_X86

  577.     int32_t i;

  578.     asm volatile(

  579.         "fistpl %0\n\t"

  580.         : "=m" (i) : "t" (x) : "st"

  581.     );

  582.     return i;

  583. #  else

  584.     /* XXX: incorrect, but make it compile */

  585.     return (int)(x + (x < 0 ? -0.5 : 0.5));

  586. #  endif /* ARCH_X86 */

  587. #else

  588.     return (int)(rint(x));

  589. #endif /* __MINGW32__ */

  590. }

  591. #endif /* HAVE_LRINTF */

  592. 

  593. #endif /* HAVE_AV_CONFIG_H */

  594. 

  595. #endif /* COMMON_H */