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FixMath.h
资源名称：fullMPCcode.rar　[点击查看]
上传用户：xjjlds
上传日期：2015-12-05
资源大小：22823k
文件大小：7k
源码类别：

多媒体编程

开发平台：

Visual C++

FixMath.h：源码内容
  1. /*
  2.      File:       FixMath.h
  3.  
  4.      Contains:   Fixed Math Interfaces.
  5.  
  6.      Version:    Technology: Mac OS 8
  7.                  Release:    QuickTime 6.0.2
  8.  
  9.      Copyright:  (c) 1985-2001 by Apple Computer, Inc., all rights reserved
  10.  
  11.      Bugs?:      For bug reports, consult the following page on
  12.                  the World Wide Web:
  13.  
  14.                      http://developer.apple.com/bugreporter/
  15.  
  16. */
  17. #ifndef __FIXMATH__
  18. #define __FIXMATH__
  20. #ifndef __MACTYPES__
  21. #include "MacTypes.h"
  22. #endif
  27. #if PRAGMA_ONCE
  28. #pragma once
  29. #endif
  31. #ifdef __cplusplus
  32. extern "C" {
  33. #endif
  35. #if PRAGMA_IMPORT
  36. #pragma import on
  37. #endif
  39. #if PRAGMA_STRUCT_ALIGN
  40.     #pragma options align=mac68k
  41. #elif PRAGMA_STRUCT_PACKPUSH
  42.     #pragma pack(push, 2)
  43. #elif PRAGMA_STRUCT_PACK
  44.     #pragma pack(2)
  45. #endif
  48. #define fixed1              ((Fixed) 0x00010000L)
  49. #define fract1              ((Fract) 0x40000000L)
  50. #define positiveInfinity    ((long)  0x7FFFFFFFL)
  51. #define negativeInfinity    ((long)  0x80000000L)
  52. /*
  53.     FixRatio, FixMul, and FixRound were previously in ToolUtils.h
  54. */
  55. EXTERN_API( Fixed )
  56. FixRatio                        (short                  numer,
  57.                                  short                  denom)                              ONEWORDINLINE(0xA869);
  59. EXTERN_API( Fixed )
  60. FixMul                          (Fixed                  a,
  61.                                  Fixed                  b)                                  ONEWORDINLINE(0xA868);
  63. EXTERN_API( short )
  64. FixRound                        (Fixed                  x)                                  ONEWORDINLINE(0xA86C);
  66. EXTERN_API( Fract )
  67. Fix2Frac                        (Fixed                  x)                                  ONEWORDINLINE(0xA841);
  69. EXTERN_API( long )
  70. Fix2Long                        (Fixed                  x)                                  ONEWORDINLINE(0xA840);
  72. EXTERN_API( Fixed )
  73. Long2Fix                        (long                   x)                                  ONEWORDINLINE(0xA83F);
  75. EXTERN_API( Fixed )
  76. Frac2Fix                        (Fract                  x)                                  ONEWORDINLINE(0xA842);
  78. EXTERN_API( Fract )
  79. FracMul                         (Fract                  x,
  80.                                  Fract                  y)                                  ONEWORDINLINE(0xA84A);
  82. EXTERN_API( Fixed )
  83. FixDiv                          (Fixed                  x,
  84.                                  Fixed                  y)                                  ONEWORDINLINE(0xA84D);
  86. EXTERN_API( Fract )
  87. FracDiv                         (Fract                  x,
  88.                                  Fract                  y)                                  ONEWORDINLINE(0xA84B);
  90. EXTERN_API( Fract )
  91. FracSqrt                        (Fract                  x)                                  ONEWORDINLINE(0xA849);
  93. EXTERN_API( Fract )
  94. FracSin                         (Fixed                  x)                                  ONEWORDINLINE(0xA848);
  96. EXTERN_API( Fract )
  97. FracCos                         (Fixed                  x)                                  ONEWORDINLINE(0xA847);
  99. EXTERN_API( Fixed )
  100. FixATan2                        (long                   x,
  101.                                  long                   y)                                  ONEWORDINLINE(0xA818);
  103. /*
  104.     Frac2X, Fix2X, X2Fix, and X2Frac translate to and from
  105.     the floating point type "extended" (that's what the X is for).
  106.     On the original Mac this was 80-bits and the functions could be
  107.     accessed via A-Traps.  When the 68881 co-processor was added,
  108.     it used 96-bit floating point types, so the A-Traps could not 
  109.     be used.  When PowerPC was added, it used 64-bit floating point
  110.     types, so yet another prototype was added.
  111. */
  112. #if TARGET_CPU_68K
  113. #if TARGET_RT_MAC_68881
  114. #if CALL_NOT_IN_CARBON
  115. EXTERN_API( long double )
  116. Frac2X                          (Fract                  x);
  118. EXTERN_API( long double )
  119. Fix2X                           (Fixed                  x);
  121. EXTERN_API( Fixed )
  122. X2Fix                           (long double            x);
  124. EXTERN_API( Fract )
  125. X2Frac                          (long double            x);
  127. #endif  /* CALL_NOT_IN_CARBON */
  129. #else
  130. #if CALL_NOT_IN_CARBON
  131. EXTERN_API( long double )
  132. Frac2X                          (Fract                  x)                                  ONEWORDINLINE(0xA845);
  134. EXTERN_API( long double )
  135. Fix2X                           (Fixed                  x)                                  ONEWORDINLINE(0xA843);
  137. EXTERN_API( Fixed )
  138. X2Fix                           (long double            x)                                  ONEWORDINLINE(0xA844);
  140. EXTERN_API( Fract )
  141. X2Frac                          (long double            x)                                  ONEWORDINLINE(0xA846);
  143. #endif  /* CALL_NOT_IN_CARBON */
  145. #endif  /* TARGET_RT_MAC_68881 */
  147. #else
  148. EXTERN_API( double )
  149. Frac2X                          (Fract                  x);
  151. EXTERN_API( double )
  152. Fix2X                           (Fixed                  x);
  154. EXTERN_API( Fixed )
  155. X2Fix                           (double                 x);
  157. EXTERN_API( Fract )
  158. X2Frac                          (double                 x);
  160. #endif  /* TARGET_CPU_68K */
  162. /* QuickTime 3.0 makes these Wide routines available on other platforms*/
  163. #if TARGET_CPU_PPC || !TARGET_OS_MAC || TARGET_CPU_X86
  164. EXTERN_API_C( short )
  165. WideCompare                     (const wide *           target,
  166.                                  const wide *           source);
  168. EXTERN_API_C( wide *)
  169. WideAdd                         (wide *                 target,
  170.                                  const wide *           source);
  172. EXTERN_API_C( wide *)
  173. WideSubtract                    (wide *                 target,
  174.                                  const wide *           source);
  176. EXTERN_API_C( wide *)
  177. WideNegate                      (wide *                 target);
  179. EXTERN_API_C( wide *)
  180. WideShift                       (wide *                 target,
  181.                                  long                   shift);
  183. EXTERN_API_C( unsigned long )
  184. WideSquareRoot                  (const wide *           source);
  186. EXTERN_API_C( wide *)
  187. WideMultiply                    (long                   multiplicand,
  188.                                  long                   multiplier,
  189.                                  wide *                 target);
  191. /* returns the quotient */
  192. EXTERN_API_C( long )
  193. WideDivide                      (const wide *           dividend,
  194.                                  long                   divisor,
  195.                                  long *                 remainder);
  197. /* quotient replaces dividend */
  198. EXTERN_API_C( wide *)
  199. WideWideDivide                  (wide *                 dividend,
  200.                                  long                   divisor,
  201.                                  long *                 remainder);
  203. EXTERN_API_C( wide *)
  204. WideBitShift                    (wide *                 src,
  205.                                  long                   shift);
  207. #endif  /* TARGET_CPU_PPC || !TARGET_OS_MAC || TARGET_CPU_X86 */
  211. #if PRAGMA_STRUCT_ALIGN
  212.     #pragma options align=reset
  213. #elif PRAGMA_STRUCT_PACKPUSH
  214.     #pragma pack(pop)
  215. #elif PRAGMA_STRUCT_PACK
  216.     #pragma pack()
  217. #endif
  219. #ifdef PRAGMA_IMPORT_OFF
  220. #pragma import off
  221. #elif PRAGMA_IMPORT
  222. #pragma import reset
  223. #endif
  225. #ifdef __cplusplus
  226. }
  227. #endif
  229. #endif /* __FIXMATH__ */