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

  14. #    define EMULATE_INTTYPES

  15. #endif

  16. 

  17. #ifndef M_PI

  18. #define M_PI    3.14159265358979323846

  19. #endif

  20. 

  21. #ifdef HAVE_AV_CONFIG_H

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

  23. #    include "config.h"

  24. 

  25. #    include <stdlib.h>

  26. #    include <stdio.h>

  27. #    include <string.h>

  28. #    include <ctype.h>

  29. #    include <limits.h>

  30. #    ifndef __BEOS__

  31. #        include <errno.h>

  32. #    else

  33. #        include "berrno.h"

  34. #    endif

  35. #    include <math.h>

  36. 

  37. #    ifndef ENODATA

  38. #        define ENODATA  61

  39. #    endif

  40. 

  41. #include <stddef.h>

  42. #ifndef offsetof

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

  44. #endif

  45. 

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

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

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

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

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

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

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

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

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

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

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

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

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

  59. #define AVOPTION_END() AVOPTION_SUB(NULL)

  60. 

  61. #endif /* HAVE_AV_CONFIG_H */

  62. 

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

  64. #ifndef restrict

  65. #    define restrict

  66. #endif

  67. 

  68. #ifndef always_inline

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

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

  71. #else

  72. #    define always_inline inline

  73. #endif

  74. #endif

  75. 

  76. #ifndef attribute_used

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

  78. #    define attribute_used __attribute__((used))

  79. #else

  80. #    define attribute_used

  81. #endif

  82. #endif

  83. 

  84. #ifndef attribute_unused

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

  86. #    define attribute_unused __attribute__((unused))

  87. #else

  88. #    define attribute_unused

  89. #endif

  90. #endif

  91. 

  92. #ifndef EMULATE_INTTYPES

  93. #   include <inttypes.h>

  94. #else

  95.     typedef signed char  int8_t;

  96.     typedef signed short int16_t;

  97.     typedef signed int   int32_t;

  98.     typedef unsigned char  uint8_t;

  99.     typedef unsigned short uint16_t;

  100.     typedef unsigned int   uint32_t;

  101. 

  102. #   ifdef CONFIG_WIN32

  103.         typedef signed __int64   int64_t;

  104.         typedef unsigned __int64 uint64_t;

  105. #   else /* other OS */

  106.         typedef signed long long   int64_t;

  107.         typedef unsigned long long uint64_t;

  108. #   endif /* other OS */

  109. #endif /* EMULATE_INTTYPES */

  110. 

  111. #ifndef PRId64

  112. #define PRId64 "lld"

  113. #endif

  114. 

  115. #ifndef PRIu64

  116. #define PRIu64 "llu"

  117. #endif

  118. 

  119. #ifndef PRIx64

  120. #define PRIx64 "llx"

  121. #endif

  122. 

  123. #ifndef PRId32

  124. #define PRId32 "d"

  125. #endif

  126. 

  127. #ifndef PRIdFAST16

  128. #define PRIdFAST16 PRId32

  129. #endif

  130. 

  131. #ifndef PRIdFAST32

  132. #define PRIdFAST32 PRId32

  133. #endif

  134. 

  135. #ifndef INT16_MIN

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

  137. #endif

  138. 

  139. #ifndef INT16_MAX

  140. #define INT16_MAX       0x7fff

  141. #endif

  142. 

  143. #ifndef INT64_MIN

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

  145. #endif

  146. 

  147. #ifndef INT64_MAX

  148. #define INT64_MAX int64_t_C(9223372036854775807)

  149. #endif

  150. 

  151. #ifndef UINT64_MAX

  152. #define UINT64_MAX uint64_t_C(0xFFFFFFFFFFFFFFFF)

  153. #endif

  154. 

  155. #ifdef EMULATE_FAST_INT

  156. typedef signed char int_fast8_t;

  157. typedef signed int  int_fast16_t;

  158. typedef signed int  int_fast32_t;

  159. typedef unsigned char uint_fast8_t;

  160. typedef unsigned int  uint_fast16_t;

  161. typedef unsigned int  uint_fast32_t;

  162. typedef uint64_t      uint_fast64_t;

  163. #endif

  164. 

  165. #ifndef INT_BIT

  166. #    if INT_MAX != 2147483647

  167. #        define INT_BIT 64

  168. #    else

  169. #        define INT_BIT 32

  170. #    endif

  171. #endif

  172. 

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

  174. static inline float floorf(float f) {

  175.     return floor(f);

  176. }

  177. #endif

  178. 

  179. #ifdef CONFIG_WIN32

  180. 

  181. /* windows */

  182. 

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

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

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

  186. 

  187. #    ifdef HAVE_AV_CONFIG_H

  188. #            define inline __inline

  189. #    endif

  190. 

  191. #    else

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

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

  194. #    endif /* __MINGW32__ */

  195. 

  196. #    ifdef HAVE_AV_CONFIG_H

  197. #        ifdef _DEBUG

  198. #            define DEBUG

  199. #        endif

  200. 

  201. #        define snprintf _snprintf

  202. #        define vsnprintf _vsnprintf

  203. #    endif

  204. 

  205. /* CONFIG_WIN32 end */

  206. #elif defined (CONFIG_OS2)

  207. /* OS/2 EMX */

  208. 

  209. #ifndef int64_t_C

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

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

  212. #endif

  213. 

  214. #ifdef HAVE_AV_CONFIG_H

  215. 

  216. #ifdef USE_FASTMEMCPY

  217. #include "fastmemcpy.h"

  218. #endif

  219. 

  220. #include <float.h>

  221. 

  222. #endif /* HAVE_AV_CONFIG_H */

  223. 

  224. /* CONFIG_OS2 end */

  225. #else

  226. 

  227. /* unix */

  228. 

  229. #ifndef int64_t_C

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

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

  232. #endif

  233. 

  234. #ifdef HAVE_AV_CONFIG_H

  235. 

  236. #        ifdef USE_FASTMEMCPY

  237. #            include "fastmemcpy.h"

  238. #        endif

  239. #    endif /* HAVE_AV_CONFIG_H */

  240. 

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

  242. 

  243. #ifdef HAVE_AV_CONFIG_H

  244. 

  245. #    include "bswap.h"

  246. 

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

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

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

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

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

  252. #        else

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

  254. #        endif

  255. #    else

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

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

  258. #        else

  259. #            define MANGLE(a) #a

  260. #        endif

  261. #    endif

  262. 

  263. /* debug stuff */

  264. 

  265. #    ifndef DEBUG

  266. #        define NDEBUG

  267. #    endif

  268. #    include <assert.h>

  269. 

  270. /* dprintf macros */

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

  272. 

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

  274. 

  275. #    else

  276. 

  277. #        ifdef DEBUG

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

  279. #        else

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

  281. #        endif

  282. 

  283. #    endif /* !CONFIG_WIN32 */

  284. 

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

  286. 

  287. //rounded divison & shift

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

  289. /* assume b>0 */

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

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

  292. 

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

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

  295. 

  296. extern const uint32_t inverse[256];

  297. 

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

  299. #    define FASTDIV(a,b) \

  300.     ({\

  301.         int ret,dmy;\

  302.         asm volatile(\

  303.             "mull %3"\

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

  305.             :"1"(a),"g"(inverse[b])\

  306.             );\

  307.         ret;\

  308.     })

  309. #elif defined(CONFIG_FASTDIV)

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

  311. #else

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

  313. #endif

  314. 

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

  316.    codec efficiency */

  317. //#define STATS

  318. 

  319. #ifdef STATS

  320. 

  321. enum {

  322.     ST_UNKNOWN,

  323.     ST_DC,

  324.     ST_INTRA_AC,

  325.     ST_INTER_AC,

  326.     ST_INTRA_MB,

  327.     ST_INTER_MB,

  328.     ST_MV,

  329.     ST_NB,

  330. };

  331. 

  332. extern int st_current_index;

  333. extern unsigned int st_bit_counts[ST_NB];

  334. extern unsigned int st_out_bit_counts[ST_NB];

  335. 

  336. void print_stats(void);

  337. #endif

  338. 

  339. /* misc math functions */

  340. extern const uint8_t ff_log2_tab[256];

  341. 

  342. static inline int av_log2(unsigned int v)

  343. {

  344.     int n;

  345. 

  346.     n = 0;

  347.     if (v & 0xffff0000) {

  348.         v >>= 16;

  349.         n += 16;

  350.     }

  351.     if (v & 0xff00) {

  352.         v >>= 8;

  353.         n += 8;

  354.     }

  355.     n += ff_log2_tab[v];

  356. 

  357.     return n;

  358. }

  359. 

  360. static inline int av_log2_16bit(unsigned int v)

  361. {

  362.     int n;

  363. 

  364.     n = 0;

  365.     if (v & 0xff00) {

  366.         v >>= 8;

  367.         n += 8;

  368.     }

  369.     n += ff_log2_tab[v];

  370. 

  371.     return n;

  372. }

  373. 

  374. /* median of 3 */

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

  376. {

  377. #if 0

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

  379.     a-=t;

  380.     b+=t;

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

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

  383. 

  384.     return b;

  385. #else

  386.     if(a>b){

  387.         if(c>b){

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

  389.             else    b=c;

  390.         }

  391.     }else{

  392.         if(b>c){

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

  394.             else    b=a;

  395.         }

  396.     }

  397.     return b;

  398. #endif

  399. }

  400. 

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

  402. {

  403.     if (a < amin)

  404.         return amin;

  405.     else if (a > amax)

  406.         return amax;

  407.     else

  408.         return a;

  409. }

  410. 

  411. static inline int clip_uint8(int a)

  412. {

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

  414.     else          return a;

  415. }

  416. 

  417. /* math */

  418. extern const uint8_t ff_sqrt_tab[128];

  419. 

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

  421. 

  422. static inline int ff_sqrt(int a)

  423. {

  424.     int ret=0;

  425.     int s;

  426.     int ret_sq=0;

  427. 

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

  429. 

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

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

  432.         if(b<=a){

  433.             ret_sq=b;

  434.             ret+= 1<<s;

  435.         }

  436.     }

  437.     return ret;

  438. }

  439. 

  440. /**

  441.  * converts fourcc string to int

  442.  */

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

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

  445. 

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

  447. }

  448. 

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

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

  451. 

  452. 

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

  454. #define MASK_ABS(mask, level)\

  455.             asm volatile(\

  456. 		"cdq			\n\t"\

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

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

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

  460. 	    );

  461. #else

  462. #define MASK_ABS(mask, level)\

  463.             mask= level>>31;\

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

  465. #endif

  466. 

  467. 

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

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

  470. asm volatile (\

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

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

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

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

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

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

  477. );

  478. #else

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

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

  481.      (x)=(y);\

  482.      (a)=(b);\

  483.      (c)=(d);\

  484. }

  485. #endif

  486. 

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

  488. #if defined(ARCH_X86_64)

  489. static inline uint64_t read_time(void)

  490. {

  491. 	uint64_t a, d;

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

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

  494. 	);

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

  496. }

  497. #elif defined(ARCH_X86)

  498. static inline long long read_time(void)

  499. {

  500. 	long long l;

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

  502. 		: "=A" (l)

  503. 	);

  504. 	return l;

  505. }

  506. #else //FIXME check ppc64

  507. static inline uint64_t read_time(void)

  508. {

  509.     uint32_t tbu, tbl, temp;

  510. 

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

  512.      __asm__ __volatile__(

  513.          "1:\n"

  514.          "mftbu  %2\n"

  515.          "mftb   %0\n"

  516.          "mftbu  %1\n"

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

  518.          "bne    1b\n"

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

  520.      :

  521.      : "cc");

  522. 

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

  524. }

  525. #endif

  526. 

  527. #define START_TIMER \

  528. uint64_t tend;\

  529. uint64_t tstart= read_time();\

  530. 

  531. #define STOP_TIMER(id) \

  532. tend= read_time();\

  533. {\

  534.   static uint64_t tsum=0;\

  535.   static int tcount=0;\

  536.   static int tskip_count=0;\

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

  538.       tsum+= tend - tstart;\

  539.       tcount++;\

  540.   }else\

  541.       tskip_count++;\

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

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

  544.   }\

  545. }

  546. #else

  547. #define START_TIMER

  548. #define STOP_TIMER(id) {}

  549. #endif

  550. 

  551. /* avoid usage of various functions */

  552. #define malloc please_use_av_malloc

  553. #define free please_use_av_free

  554. #define realloc please_use_av_realloc

  555. #define time time_is_forbidden_due_to_security_issues

  556. #define rand rand_is_forbidden_due_to_state_trashing

  557. #define srand srand_is_forbidden_due_to_state_trashing

  558. #define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf

  559. #define strcat strcat_is_forbidden_due_to_security_issues_use_pstrcat

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

  561. #define printf please_use_av_log

  562. #define fprintf please_use_av_log

  563. #endif

  564. 

  565. #define CHECKED_ALLOCZ(p, size)\

  566. {\

  567.     p= av_mallocz(size);\

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

  569.         perror("malloc");\

  570.         goto fail;\

  571.     }\

  572. }

  573. 

  574. #ifndef HAVE_LRINTF

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

  576. /* better than nothing implementation. */

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

  578. static always_inline long int lrintf(float x)

  579. {

  580. #ifdef CONFIG_WIN32

  581. #  ifdef ARCH_X86

  582.     int32_t i;

  583.     asm volatile(

  584.         "fistpl %0\n\t"

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

  586.     );

  587.     return i;

  588. #  else

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

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

  591. #  endif /* ARCH_X86 */

  592. #else

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

  594. #endif /* CONFIG_WIN32 */

  595. }

  596. #else

  597. #ifndef _ISOC9X_SOURCE

  598. #define _ISOC9X_SOURCE

  599. #endif

  600. #include <math.h>

  601. #endif /* HAVE_LRINTF */

  602. 

  603. #endif /* HAVE_AV_CONFIG_H */

  604. 

  605. #endif /* COMMON_H */