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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. 

  98. #   ifdef __MINGW32__

  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 /* EMULATE_INTTYPES */

  106. 

  107. #ifndef PRId64

  108. #define PRId64 "lld"

  109. #endif

  110. 

  111. #ifndef PRIu64

  112. #define PRIu64 "llu"

  113. #endif

  114. 

  115. #ifndef PRIx64

  116. #define PRIx64 "llx"

  117. #endif

  118. 

  119. #ifndef PRId32

  120. #define PRId32 "d"

  121. #endif

  122. 

  123. #ifndef PRIdFAST16

  124. #define PRIdFAST16 PRId32

  125. #endif

  126. 

  127. #ifndef PRIdFAST32

  128. #define PRIdFAST32 PRId32

  129. #endif

  130. 

  131. #ifndef INT16_MIN

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

  133. #endif

  134. 

  135. #ifndef INT16_MAX

  136. #define INT16_MAX       0x7fff

  137. #endif

  138. 

  139. #ifndef INT32_MIN

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

  141. #endif

  142. 

  143. #ifndef INT32_MAX

  144. #define INT32_MAX       0x7fffffff

  145. #endif

  146. 

  147. #ifndef UINT32_MAX

  148. #define UINT32_MAX      0xffffffff

  149. #endif

  150. 

  151. #ifndef INT64_MIN

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

  153. #endif

  154. 

  155. #ifndef INT64_MAX

  156. #define INT64_MAX int64_t_C(9223372036854775807)

  157. #endif

  158. 

  159. #ifndef UINT64_MAX

  160. #define UINT64_MAX uint64_t_C(0xFFFFFFFFFFFFFFFF)

  161. #endif

  162. 

  163. #ifdef EMULATE_FAST_INT

  164. typedef signed char int_fast8_t;

  165. typedef signed int  int_fast16_t;

  166. typedef signed int  int_fast32_t;

  167. typedef unsigned char uint_fast8_t;

  168. typedef unsigned int  uint_fast16_t;

  169. typedef unsigned int  uint_fast32_t;

  170. typedef uint64_t      uint_fast64_t;

  171. #endif

  172. 

  173. #ifndef INT_BIT

  174. #    if INT_MAX != 2147483647

  175. #        define INT_BIT 64

  176. #    else

  177. #        define INT_BIT 32

  178. #    endif

  179. #endif

  180. 

  181. #ifdef __MINGW32__

  182. 

  183. /* windows */

  184. 

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

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

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

  188. 

  189. #    ifdef HAVE_AV_CONFIG_H

  190. #            define inline __inline

  191. #    endif

  192. 

  193. #    else

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

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

  196. #    endif /* __MINGW32__ */

  197. 

  198. #    ifdef HAVE_AV_CONFIG_H

  199. #        ifdef _DEBUG

  200. #            define DEBUG

  201. #        endif

  202. 

  203. #        define snprintf _snprintf

  204. #        define vsnprintf _vsnprintf

  205. 

  206. #        ifdef CONFIG_WINCE

  207. #            define perror(a)

  208. #        endif

  209. 

  210. #    endif

  211. 

  212. /* __MINGW32__ end */

  213. #elif defined (CONFIG_OS2)

  214. /* OS/2 EMX */

  215. 

  216. #ifndef int64_t_C

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

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

  219. #endif

  220. 

  221. #ifdef HAVE_AV_CONFIG_H

  222. 

  223. #ifdef USE_FASTMEMCPY

  224. #include "fastmemcpy.h"

  225. #endif

  226. 

  227. #include <float.h>

  228. 

  229. #endif /* HAVE_AV_CONFIG_H */

  230. 

  231. /* CONFIG_OS2 end */

  232. #else

  233. 

  234. /* unix */

  235. 

  236. #ifndef int64_t_C

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

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

  239. #endif

  240. 

  241. #ifdef HAVE_AV_CONFIG_H

  242. 

  243. #        ifdef USE_FASTMEMCPY

  244. #            include "fastmemcpy.h"

  245. #        endif

  246. #    endif /* HAVE_AV_CONFIG_H */

  247. 

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

  249. 

  250. #ifdef HAVE_AV_CONFIG_H

  251. 

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

  253. #  define FF_IMPORT_ATTR __declspec(dllimport)

  254. #else

  255. #  define FF_IMPORT_ATTR

  256. #endif

  257. 

  258. 

  259. #    include "bswap.h"

  260. 

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

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

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

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

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

  266. #        else

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

  268. #        endif

  269. #    else

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

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

  272. #        elif defined(CONFIG_DARWIN)

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

  274. #        else

  275. #            define MANGLE(a) #a

  276. #        endif

  277. #    endif

  278. 

  279. /* debug stuff */

  280. 

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

  282. #        define NDEBUG

  283. #    endif

  284. #    include <assert.h>

  285. 

  286. /* dprintf macros */

  287. #    ifdef DEBUG

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

  289. #    else

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

  291. #    endif

  292. 

  293. #    ifdef CONFIG_WINCE

  294. #            define abort()

  295. #    endif

  296. 

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

  298. 

  299. //rounded divison & shift

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

  301. /* assume b>0 */

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

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

  304. 

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

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

  307. 

  308. extern const uint32_t inverse[256];

  309. 

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

  311. #    define FASTDIV(a,b) \

  312.     ({\

  313.         int ret,dmy;\

  314.         asm volatile(\

  315.             "mull %3"\

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

  317.             :"1"(a),"g"(inverse[b])\

  318.             );\

  319.         ret;\

  320.     })

  321. #elif defined(CONFIG_FASTDIV)

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

  323. #else

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

  325. #endif

  326. 

  327. /* misc math functions */

  328. extern FF_IMPORT_ATTR const uint8_t ff_log2_tab[256];

  329. 

  330. static inline int av_log2(unsigned int v)

  331. {

  332.     int n;

  333. 

  334.     n = 0;

  335.     if (v & 0xffff0000) {

  336.         v >>= 16;

  337.         n += 16;

  338.     }

  339.     if (v & 0xff00) {

  340.         v >>= 8;

  341.         n += 8;

  342.     }

  343.     n += ff_log2_tab[v];

  344. 

  345.     return n;

  346. }

  347. 

  348. static inline int av_log2_16bit(unsigned int v)

  349. {

  350.     int n;

  351. 

  352.     n = 0;

  353.     if (v & 0xff00) {

  354.         v >>= 8;

  355.         n += 8;

  356.     }

  357.     n += ff_log2_tab[v];

  358. 

  359.     return n;

  360. }

  361. 

  362. /* median of 3 */

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

  364. {

  365. #if 0

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

  367.     a-=t;

  368.     b+=t;

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

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

  371. 

  372.     return b;

  373. #else

  374.     if(a>b){

  375.         if(c>b){

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

  377.             else    b=c;

  378.         }

  379.     }else{

  380.         if(b>c){

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

  382.             else    b=a;

  383.         }

  384.     }

  385.     return b;

  386. #endif

  387. }

  388. 

  389. /**

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

  391.  * @param a value to clip

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

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

  394.  * @return cliped value

  395.  */

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

  397. {

  398.     if (a < amin)      return amin;

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

  400.     else               return a;

  401. }

  402. 

  403. /**

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

  405.  * @param a value to clip

  406.  * @return cliped value

  407.  */

  408. static inline uint8_t clip_uint8(int a)

  409. {

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

  411.     else          return a;

  412. }

  413. 

  414. /* math */

  415. extern FF_IMPORT_ATTR const uint8_t ff_sqrt_tab[128];

  416. 

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

  418. 

  419. static inline int ff_sqrt(int a)

  420. {

  421.     int ret=0;

  422.     int s;

  423.     int ret_sq=0;

  424. 

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

  426. 

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

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

  429.         if(b<=a){

  430.             ret_sq=b;

  431.             ret+= 1<<s;

  432.         }

  433.     }

  434.     return ret;

  435. }

  436. 

  437. /**

  438.  * converts fourcc string to int

  439.  */

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

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

  442. 

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

  444. }

  445. 

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

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

  448. 

  449. 

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

  451. #define MASK_ABS(mask, level)\

  452.             asm volatile(\

  453.                 "cdq                    \n\t"\

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

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

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

  457.             );

  458. #else

  459. #define MASK_ABS(mask, level)\

  460.             mask= level>>31;\

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

  462. #endif

  463. 

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

  465.     val= GET_BYTE;\

  466.     {\

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

  468.         if(ones==1)\

  469.             ERROR\

  470.         val&= 127>>ones;\

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

  472.             int tmp= GET_BYTE - 128;\

  473.             if(tmp>>6)\

  474.                 ERROR\

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

  476.         }\

  477.     }

  478. 

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

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

  481. asm volatile (\

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

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

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

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

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

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

  488. );

  489. #else

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

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

  492.      (x)=(y);\

  493.      (a)=(b);\

  494.      (c)=(d);\

  495. }

  496. #endif

  497. 

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

  499. #if defined(ARCH_X86_64)

  500. static inline uint64_t read_time(void)

  501. {

  502.         uint64_t a, d;

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

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

  505.         );

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

  507. }

  508. #elif defined(ARCH_X86)

  509. static inline long long read_time(void)

  510. {

  511.         long long l;

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

  513.                 : "=A" (l)

  514.         );

  515.         return l;

  516. }

  517. #else //FIXME check ppc64

  518. static inline uint64_t read_time(void)

  519. {

  520.     uint32_t tbu, tbl, temp;

  521. 

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

  523.      __asm__ __volatile__(

  524.          "1:\n"

  525.          "mftbu  %2\n"

  526.          "mftb   %0\n"

  527.          "mftbu  %1\n"

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

  529.          "bne    1b\n"

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

  531.      :

  532.      : "cc");

  533. 

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

  535. }

  536. #endif

  537. 

  538. #define START_TIMER \

  539. uint64_t tend;\

  540. uint64_t tstart= read_time();\

  541. 

  542. #define STOP_TIMER(id) \

  543. tend= read_time();\

  544. {\

  545.   static uint64_t tsum=0;\

  546.   static int tcount=0;\

  547.   static int tskip_count=0;\

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

  549.       tsum+= tend - tstart;\

  550.       tcount++;\

  551.   }else\

  552.       tskip_count++;\

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

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

  555.   }\

  556. }

  557. #else

  558. #define START_TIMER

  559. #define STOP_TIMER(id) {}

  560. #endif

  561. 

  562. /* avoid usage of various functions */

  563. #define malloc please_use_av_malloc

  564. #define free please_use_av_free

  565. #define realloc please_use_av_realloc

  566. #define time time_is_forbidden_due_to_security_issues

  567. #define rand rand_is_forbidden_due_to_state_trashing

  568. #define srand srand_is_forbidden_due_to_state_trashing

  569. #define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf

  570. #define strcat strcat_is_forbidden_due_to_security_issues_use_pstrcat

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

  572. #define printf please_use_av_log

  573. #define fprintf please_use_av_log

  574. #endif

  575. 

  576. #define CHECKED_ALLOCZ(p, size)\

  577. {\

  578.     p= av_mallocz(size);\

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

  580.         perror("malloc");\

  581.         goto fail;\

  582.     }\

  583. }

  584. 

  585. #ifndef HAVE_LRINTF

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

  587. /* better than nothing implementation. */

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

  589. static always_inline long int lrintf(float x)

  590. {

  591. #ifdef __MINGW32__

  592. #  ifdef ARCH_X86

  593.     int32_t i;

  594.     asm volatile(

  595.         "fistpl %0\n\t"

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

  597.     );

  598.     return i;

  599. #  else

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

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

  602. #  endif /* ARCH_X86 */

  603. #else

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

  605. #endif /* __MINGW32__ */

  606. }

  607. #else

  608. #ifndef _ISOC9X_SOURCE

  609. #define _ISOC9X_SOURCE

  610. #endif

  611. #include <math.h>

  612. #endif /* HAVE_LRINTF */

  613. 

  614. #endif /* HAVE_AV_CONFIG_H */

  615. 

  616. #endif /* COMMON_H */