libs/appleutility/CABufferList.cpp

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  37 */
  38 /*=============================================================================
  39         CABufferList.cpp
  40
  41 =============================================================================*/
  42
  43 #include "CABufferList.h"
  44 #if !defined(__COREAUDIO_USE_FLAT_INCLUDES__)
  45         #include <CoreServices/CoreServices.h>
  46 #else
  47         #include <Endian.h>
  48 #endif
  49
  50 void            CABufferList::AllocateBuffers(UInt32 nBytes)
  51 {
  52         if (nBytes <= GetNumBytes()) return;
  53
  54         if (mNumberBuffers > 1)
  55                 // align successive buffers for Altivec and to take alternating
  56                 // cache line hits by spacing them by odd multiples of 16
  57                 nBytes = (nBytes + (0x10 - (nBytes & 0xF))) | 0x10;
  58         UInt32 memorySize = nBytes * mNumberBuffers;
  59         Byte *newMemory = new Byte[memorySize], *p = newMemory;
  60         memset(newMemory, 0, memorySize);       // get page faults now, not later
  61
  62         AudioBuffer *buf = mBuffers;
  63         for (UInt32 i = mNumberBuffers; i--; ++buf) {
  64                 if (buf->mData != NULL && buf->mDataByteSize > 0)
  65                         // preserve existing buffer contents
  66                         memcpy(p, buf->mData, buf->mDataByteSize);
  67                 buf->mDataByteSize = nBytes;
  68                 buf->mData = p;
  69                 p += nBytes;
  70         }
  71         Byte *oldMemory = mBufferMemory;
  72         mBufferMemory = newMemory;
  73         delete[] oldMemory;
  74 }
  75
  76 void            CABufferList::AllocateBuffersAndCopyFrom(UInt32 nBytes, CABufferList *inSrcList, CABufferList *inSetPtrList)
  77 {
  78         if (mNumberBuffers != inSrcList->mNumberBuffers) return;
  79         if (mNumberBuffers != inSetPtrList->mNumberBuffers) return;
  80         if (nBytes <= GetNumBytes()) {
  81                 CopyAllFrom(inSrcList, inSetPtrList);
  82                 return;
  83         }
  84         inSetPtrList->VerifyNotTrashingOwnedBuffer();
  85         UInt32 fromByteSize = inSrcList->GetNumBytes();
  86
  87         if (mNumberBuffers > 1)
  88                 // align successive buffers for Altivec and to take alternating
  89                 // cache line hits by spacing them by odd multiples of 16
  90                 nBytes = (nBytes + (0x10 - (nBytes & 0xF))) | 0x10;
  91         UInt32 memorySize = nBytes * mNumberBuffers;
  92         Byte *newMemory = new Byte[memorySize], *p = newMemory;
  93         memset(newMemory, 0, memorySize);       // make buffer "hot"
  94
  95         AudioBuffer *buf = mBuffers;
  96         AudioBuffer *ptrBuf = inSetPtrList->mBuffers;
  97         AudioBuffer *srcBuf = inSrcList->mBuffers;
  98         for (UInt32 i = mNumberBuffers; i--; ++buf, ++ptrBuf, ++srcBuf) {
  99                 if (srcBuf->mData != NULL && srcBuf->mDataByteSize > 0)
 100                         // preserve existing buffer contents
 101                         memmove(p, srcBuf->mData, srcBuf->mDataByteSize);
 102                 buf->mDataByteSize = nBytes;
 103                 buf->mData = p;
 104                 ptrBuf->mDataByteSize = srcBuf->mDataByteSize;
 105                 ptrBuf->mData = p;
 106                 p += nBytes;
 107         }
 108         Byte *oldMemory = mBufferMemory;
 109         mBufferMemory = newMemory;
 110         if (inSrcList != inSetPtrList)
 111                 inSrcList->BytesConsumed(fromByteSize);
 112         delete[] oldMemory;
 113 }
 114
 115 void            CABufferList::DeallocateBuffers()
 116 {
 117         AudioBuffer *buf = mBuffers;
 118         for (UInt32 i = mNumberBuffers; i--; ++buf) {
 119                 buf->mData = NULL;
 120                 buf->mDataByteSize = 0;
 121         }
 122         if (mBufferMemory != NULL) {
 123                 delete[] mBufferMemory;
 124                 mBufferMemory = NULL;
 125         }
 126
 127 }
 128
 129 extern "C" void CAShowAudioBufferList(const AudioBufferList *abl, int framesToPrint, int wordSize)
 130 {
 131         printf("AudioBufferList @ %p:\n", abl);
 132         const AudioBuffer *buf = abl->mBuffers;
 133         for (UInt32 i = 0; i < abl->mNumberBuffers; ++i, ++buf) {
 134                 printf("  [%2ld]: %2ldch, %5ld bytes @ %8p",
 135                         i, buf->mNumberChannels, buf->mDataByteSize, buf->mData);
 136                 if (framesToPrint) {
 137                         printf(":");
 138                         Byte *p = (Byte *)buf->mData;
 139                         for (int j = framesToPrint * buf->mNumberChannels; --j >= 0; )
 140                                 switch (wordSize) {
 141                                 case 0:
 142                                         printf(" %6.3f", *(Float32 *)p);
 143                                         p += sizeof(Float32);
 144                                         break;
 145                                 case 1:
 146                                 case -1:
 147                                         printf(" %02X", *p);
 148                                         p += 1;
 149                                         break;
 150                                 case 2:
 151                                         printf(" %04X", EndianU16_BtoN(*(UInt16 *)p));
 152                                         p += 2;
 153                                         break;
 154                                 case 3:
 155                                         printf(" %06X", (p[0] << 16) | (p[1] << 8) | p[2]);
 156                                         p += 3;
 157                                         break;
 158                                 case 4:
 159                                         printf(" %08lX", EndianU32_BtoN(*(UInt32 *)p));
 160                                         p += 4;
 161                                         break;
 162                                 case -2:
 163                                         printf(" %04X", EndianU16_LtoN(*(UInt16 *)p));
 164                                         p += 2;
 165                                         break;
 166                                 case -3:
 167                                         printf(" %06X", (p[2] << 16) | (p[1] << 8) | p[0]);
 168                                         p += 3;
 169                                         break;
 170                                 case -4:
 171                                         printf(" %08lX", EndianU32_LtoN(*(UInt32 *)p));
 172                                         p += 4;
 173                                         break;
 174                                 }
 175                 }
 176                 printf("\n");
 177         }
 178 }
 179