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00024
00025 #if !defined(__RINGBUFFER_HEADER_INCLUDED__)
00026 #define __RINGBUFFER_HEADER_INCLUDED__
00027
00028 #ifdef WIN32
00029 #define INLINE __forceinline
00030 #else
00031 #define INLINE
00032 #endif
00033
00035 static INLINE unsigned int Int2PowTwo (int iValue)
00036 {
00037 unsigned int iOrder = 0;
00038
00039 while (iValue>>iOrder)
00040 iOrder++;
00041
00042 if (!(iValue%(1<<(iOrder-1))))
00043 iOrder--;
00044
00045 return (1<<(iOrder));
00046 }
00047
00048
00049
00050
00051
00052
00053
00054
00055
00056 template <class T> class CRingBuffer
00057 {
00058
00059 private:
00060
00061 unsigned int m_uiReadIndex,
00062 m_uiWriteIndex,
00063 m_uiTmpIndex;
00064
00065 unsigned int m_uiSize,
00066 m_uiMask;
00067
00068 T *m_ptBuffer;
00069
00070
00071 public:
00072 static int CreateInstance (CRingBuffer*& pCRingBuffer, unsigned int uiLength)
00073 {
00074 int rErr = 0;
00075 pCRingBuffer = 0;
00076
00077
00078 pCRingBuffer = new CRingBuffer (uiLength);
00079
00080 if (pCRingBuffer == NULL)
00081 rErr = -1;
00082 else if (!pCRingBuffer->m_ptBuffer)
00083 {
00084 rErr = -1;
00085 delete pCRingBuffer;
00086 pCRingBuffer= 0;
00087 }
00088
00089 return rErr;
00090 };
00091
00092 static int DestroyInstance (CRingBuffer*& pCRingBuffer)
00093 {
00094 if (!pCRingBuffer)
00095 return -1;
00096
00097 delete pCRingBuffer;
00098 pCRingBuffer = 0;
00099
00100 return 0;
00101 };
00102
00103
00104
00105
00106
00107
00108
00109
00110
00111
00112 CRingBuffer(unsigned int uiNewSize)
00113 {
00114
00115 m_uiSize = Int2PowTwo(uiNewSize);
00116 m_uiMask = m_uiSize-1;
00117 m_uiReadIndex = 0;
00118 m_uiWriteIndex = 0;
00119 m_uiTmpIndex = 0;
00120 m_ptBuffer = 0;
00121 m_ptBuffer = new T[m_uiSize];
00122 for( unsigned int i=0; i<m_uiSize; m_ptBuffer[i++] = 0);
00123 }
00124
00125
00126
00127
00128
00129
00130
00131
00132
00133
00134
00135 ~CRingBuffer()
00136 {
00137 if (m_ptBuffer)
00138 delete [] m_ptBuffer;
00139 }
00140
00141
00142
00143
00144
00145
00146
00147
00148
00149
00150
00151
00152 INLINE T GetOff(int iIndex)
00153 {
00154 return m_ptBuffer[(m_uiReadIndex + iIndex + m_uiSize) & m_uiMask];
00155 }
00156
00157 INLINE T GetOffW(int iIndex)
00158 {
00159 return m_ptBuffer[(m_uiWriteIndex + iIndex + m_uiSize) & m_uiMask];
00160 }
00161
00162
00163
00164
00165
00166
00167
00168
00169
00170
00171
00172
00173
00174 INLINE void PutOff(T tItem,int iIndex)
00175 {
00176 m_ptBuffer[(m_uiWriteIndex + iIndex + m_uiSize) & m_uiMask] = tItem;
00177 }
00178
00179
00180
00181
00182
00183
00184
00185
00186
00187
00188
00189 INLINE T GetOffMod(int iIndex)
00190 {
00191 m_uiReadIndex = ((m_uiReadIndex + iIndex + m_uiSize) & m_uiMask);
00192 return m_ptBuffer[ m_uiReadIndex ];
00193 }
00194
00195
00196
00197
00198
00199
00200
00201
00202
00203
00204
00205
00206
00207 INLINE void PutOffMod(T tItem,int iIndex)
00208 {
00209 m_uiWriteIndex = (m_uiWriteIndex + iIndex + m_uiSize) & m_uiMask;
00210 m_ptBuffer[m_uiWriteIndex] = tItem;
00211 }
00212
00213
00214
00215
00216
00217
00218
00219
00220
00221
00222
00223 INLINE T Get()
00224 {
00225 return m_ptBuffer[ m_uiReadIndex ];
00226 }
00227
00228
00229
00230
00231
00232
00233
00234
00235
00236
00237
00238 INLINE void Put(T tItem)
00239 {
00240 m_ptBuffer[ m_uiWriteIndex ] = tItem;
00241 }
00242
00243
00244
00245
00246
00247
00248
00249
00250
00251
00252
00253
00254 INLINE T GetPostInc()
00255 {
00256 m_uiTmpIndex = m_uiReadIndex;
00257 m_uiReadIndex = (m_uiReadIndex + 1) & m_uiMask;
00258 return m_ptBuffer[ m_uiTmpIndex ];
00259 }
00260
00261 INLINE void GetPostInc (T* ptBuffer, int iNumOfItems)
00262 {
00263 if (iNumOfItems <= 0)
00264 return;
00265 m_uiTmpIndex = m_uiReadIndex;
00266 m_uiReadIndex = (m_uiReadIndex + iNumOfItems) & m_uiMask;
00267 if (m_uiTmpIndex + iNumOfItems <= m_uiSize)
00268 {
00269 memcpy (ptBuffer, &m_ptBuffer[ m_uiTmpIndex ], sizeof(T) * iNumOfItems);
00270 return;
00271 }
00272 else
00273 {
00274 ZASSERT (m_uiSize - m_uiTmpIndex <= 0);
00275 ZASSERT (iNumOfItems - m_uiSize + m_uiTmpIndex <= 0);
00276 memcpy (ptBuffer, &m_ptBuffer[ m_uiTmpIndex ], sizeof(T) * (m_uiSize - m_uiTmpIndex));
00277 memcpy (&ptBuffer[m_uiSize - m_uiTmpIndex], m_ptBuffer, sizeof(T) * (iNumOfItems - m_uiSize + m_uiTmpIndex));
00278 return;
00279 }
00280 }
00281 INLINE void GetOffPostInc(T* ptBuffer, int iNumOfItems, int iIndex)
00282 {
00283 if (iNumOfItems <= 0)
00284 return;
00285 m_uiTmpIndex = ((m_uiReadIndex + iIndex + m_uiSize) & m_uiMask);
00286 m_uiReadIndex = (m_uiReadIndex + iNumOfItems) & m_uiMask;
00287 if (m_uiTmpIndex + iNumOfItems <= m_uiSize)
00288 {
00289 memcpy (ptBuffer, &m_ptBuffer[ m_uiTmpIndex ], sizeof(T) * iNumOfItems);
00290 return;
00291 }
00292 else
00293 {
00294 ZASSERT (m_uiSize - m_uiTmpIndex <= 0);
00295 ZASSERT (iNumOfItems - m_uiSize + m_uiTmpIndex <= 0);
00296 memcpy (ptBuffer, &m_ptBuffer[ m_uiTmpIndex ], sizeof(T) * (m_uiSize - m_uiTmpIndex));
00297 memcpy (&ptBuffer[m_uiSize - m_uiTmpIndex], m_ptBuffer, sizeof(T) * (iNumOfItems - m_uiSize + m_uiTmpIndex));
00298 return;
00299 }
00300 }
00301 INLINE void GetOff(T* ptBuffer, int iNumOfItems, int iIndex)
00302 {
00303 if (iNumOfItems <= 0)
00304 return;
00305 m_uiTmpIndex = ((m_uiReadIndex + iIndex + m_uiSize) & m_uiMask);
00306 if (m_uiTmpIndex + iNumOfItems <= m_uiSize)
00307 {
00308 memcpy (ptBuffer, &m_ptBuffer[ m_uiTmpIndex ], sizeof(T) * iNumOfItems);
00309 return;
00310 }
00311 else
00312 {
00313 ZASSERT (m_uiSize - m_uiTmpIndex <= 0);
00314 ZASSERT (iNumOfItems - m_uiSize + m_uiTmpIndex <= 0);
00315 memcpy (ptBuffer, &m_ptBuffer[ m_uiTmpIndex ], sizeof(T) * (m_uiSize - m_uiTmpIndex));
00316 memcpy (&ptBuffer[m_uiSize - m_uiTmpIndex], m_ptBuffer, sizeof(T) * (iNumOfItems - m_uiSize + m_uiTmpIndex));
00317 return;
00318 }
00319 }
00320 INLINE void GetOffW(T* ptBuffer, int iNumOfItems, int iIndex)
00321 {
00322 if (iNumOfItems <= 0)
00323 return;
00324 m_uiTmpIndex = ((m_uiWriteIndex + iIndex + m_uiSize) & m_uiMask);
00325 if (m_uiTmpIndex + iNumOfItems <= m_uiSize)
00326 {
00327 memcpy (ptBuffer, &m_ptBuffer[ m_uiTmpIndex ], sizeof(T) * iNumOfItems);
00328 return;
00329 }
00330 else
00331 {
00332 ZASSERT (m_uiSize - m_uiTmpIndex <= 0);
00333 ZASSERT (iNumOfItems - m_uiSize + m_uiTmpIndex <= 0);
00334 memcpy (ptBuffer, &m_ptBuffer[ m_uiTmpIndex ], sizeof(T) * (m_uiSize - m_uiTmpIndex));
00335 memcpy (&ptBuffer[m_uiSize - m_uiTmpIndex], m_ptBuffer, sizeof(T) * (iNumOfItems - m_uiSize + m_uiTmpIndex));
00336 return;
00337 }
00338 }
00339
00340
00341
00342
00343
00344
00345
00346
00347
00348
00349
00350 INLINE void PutPostInc(T tItem)
00351 {
00352 m_uiTmpIndex = m_uiWriteIndex;
00353 m_uiWriteIndex = (m_uiWriteIndex + 1) & m_uiMask;
00354 m_ptBuffer[ m_uiTmpIndex ] = tItem;
00355 }
00356
00357
00358 INLINE void PutPostInc(const T *ptItem, int iNumOfItems)
00359 {
00360 if (iNumOfItems <= 0)
00361 return;
00362 m_uiTmpIndex = m_uiWriteIndex;
00363 m_uiWriteIndex = (m_uiWriteIndex + iNumOfItems) & m_uiMask;
00364 if (m_uiTmpIndex + iNumOfItems <= m_uiSize)
00365 {
00366 memcpy (&m_ptBuffer[ m_uiTmpIndex ], ptItem, sizeof(T) * iNumOfItems);
00367 return;
00368 }
00369 else
00370 {
00371 ZASSERT (m_uiSize - m_uiTmpIndex <= 0);
00372 ZASSERT (iNumOfItems - m_uiSize + m_uiTmpIndex <= 0);
00373 memcpy (&m_ptBuffer[ m_uiTmpIndex ], ptItem, sizeof(T) * (m_uiSize - m_uiTmpIndex));
00374 memcpy (m_ptBuffer, &ptItem[m_uiSize - m_uiTmpIndex], sizeof(T) * (iNumOfItems - m_uiSize + m_uiTmpIndex));
00375 return;
00376 }
00377 }
00378
00379
00380
00381
00382
00383
00384
00385
00386
00387
00388
00389
00390 INLINE T GetPreInc()
00391 {
00392 m_uiReadIndex = (m_uiReadIndex + 1) & m_uiMask;
00393 return m_ptBuffer[ m_uiReadIndex ];
00394 }
00395
00396
00397
00398
00399
00400
00401
00402
00403
00404
00405
00406
00407 INLINE void PutPreInc(T tItem)
00408 {
00409 m_uiWriteIndex = (m_uiWriteIndex + 1) & m_uiMask;
00410 m_ptBuffer[ m_uiWriteIndex ] = tItem;
00411 }
00412
00413
00414
00415
00416
00417
00418
00419
00420
00421
00422
00423
00424 INLINE T GetPostDec()
00425 {
00426 m_uiTmpIndex = m_uiReadIndex;
00427 m_uiReadIndex = (m_uiReadIndex - 1 + m_uiSize) & m_uiMask;
00428 return m_ptBuffer[ m_uiTmpIndex ];
00429 }
00430
00431
00432
00433
00434
00435
00436
00437
00438
00439
00440
00441 INLINE void PutPostDec(T tItem)
00442 {
00443 m_uiTmpIndex = m_uiWriteIndex;
00444 m_uiWriteIndex = (m_uiWriteIndex - 1 + m_uiSize) & m_uiMask;
00445 m_ptBuffer[ m_uiTmpIndex ] = tItem;
00446 }
00447
00448
00449
00450
00451
00452
00453
00454
00455
00456
00457
00458
00459 INLINE T GetPreDec()
00460 {
00461 m_uiReadIndex = (m_uiReadIndex - 1 + m_uiSize) & m_uiMask;
00462 return m_ptBuffer[ m_uiReadIndex ];
00463 }
00464
00465
00466
00467
00468
00469
00470
00471
00472
00473
00474
00475
00476
00477 INLINE void PutPreDec(T tItem)
00478 {
00479 m_uiWriteIndex = (m_uiWriteIndex - 1 + m_uiSize) & m_uiMask;
00480 m_ptBuffer[ m_uiWriteIndex ] = tItem;
00481 }
00482
00483
00484
00485
00486
00487
00488
00489
00490
00491
00492
00493 INLINE int GetReadPos()
00494 {
00495 return m_uiReadIndex;
00496 }
00497
00498
00499
00500
00501
00502
00503
00504
00505
00506
00507
00508 INLINE int GetWritePos()
00509 {
00510 return m_uiWriteIndex;
00511 }
00512
00513
00514
00515
00516
00517
00518
00519
00520
00521
00522
00523 INLINE void SetReadPos(int iIndex)
00524 {
00525 m_uiReadIndex = (iIndex + m_uiSize) & m_uiMask;
00526 }
00527
00528
00529
00530
00531
00532
00533
00534
00535
00536
00537
00538 INLINE void SetWritePos(int iIndex)
00539 {
00540 m_uiWriteIndex = (iIndex + m_uiSize) & m_uiMask;
00541 }
00542
00543
00544
00545
00546
00547
00548
00549
00550
00551
00552
00553
00554
00555 INLINE int GetSamplesInBuffer()
00556 {
00557 int iCount = m_uiWriteIndex - m_uiReadIndex;
00558
00559 return (iCount < 0 ? m_uiSize + iCount : iCount);
00560 }
00561
00562 INLINE void Reset()
00563 {
00564 m_uiReadIndex = 0;
00565 m_uiWriteIndex = 0;
00566 m_uiTmpIndex = 0;
00567 for( unsigned int i=0; i<m_uiSize; m_ptBuffer[i++] = 0);
00568 }
00569
00570 };
00571
00572 #endif // __RINGBUFFER_HEADER_INCLUDED__
00573
00574