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/*=============================================================================
	CABufferList.cpp
	
=============================================================================*/

#include "CABufferList.h"
#if !defined(__COREAUDIO_USE_FLAT_INCLUDES__)
	#include <CoreServices/CoreServices.h>
#else
	#include <Endian.h>
#endif

void		CABufferList::AllocateBuffers(UInt32 nBytes)
{
	if (nBytes <= GetNumBytes()) return;
	
	if (mNumberBuffers > 1)
		// align successive buffers for Altivec and to take alternating
		// cache line hits by spacing them by odd multiples of 16
		nBytes = (nBytes + (0x10 - (nBytes & 0xF))) | 0x10;
	UInt32 memorySize = nBytes * mNumberBuffers;
	Byte *newMemory = new Byte[memorySize], *p = newMemory;
	memset(newMemory, 0, memorySize);	// get page faults now, not later
	
	AudioBuffer *buf = mBuffers;
	for (UInt32 i = mNumberBuffers; i--; ++buf) {
		if (buf->mData != NULL && buf->mDataByteSize > 0)
			// preserve existing buffer contents
			memcpy(p, buf->mData, buf->mDataByteSize);
		buf->mDataByteSize = nBytes;
		buf->mData = p;
		p += nBytes;
	}
	Byte *oldMemory = mBufferMemory;
	mBufferMemory = newMemory;
	delete[] oldMemory;
}

void		CABufferList::AllocateBuffersAndCopyFrom(UInt32 nBytes, CABufferList *inSrcList, CABufferList *inSetPtrList)
{
	if (mNumberBuffers != inSrcList->mNumberBuffers) return;
	if (mNumberBuffers != inSetPtrList->mNumberBuffers) return;
	if (nBytes <= GetNumBytes()) {
		CopyAllFrom(inSrcList, inSetPtrList);
		return;
	}
	inSetPtrList->VerifyNotTrashingOwnedBuffer();
	UInt32 fromByteSize = inSrcList->GetNumBytes();
	
	if (mNumberBuffers > 1)
		// align successive buffers for Altivec and to take alternating
		// cache line hits by spacing them by odd multiples of 16
		nBytes = (nBytes + (0x10 - (nBytes & 0xF))) | 0x10;
	UInt32 memorySize = nBytes * mNumberBuffers;
	Byte *newMemory = new Byte[memorySize], *p = newMemory;
	memset(newMemory, 0, memorySize);	// make buffer "hot"
	
	AudioBuffer *buf = mBuffers;
	AudioBuffer *ptrBuf = inSetPtrList->mBuffers;
	AudioBuffer *srcBuf = inSrcList->mBuffers;
	for (UInt32 i = mNumberBuffers; i--; ++buf, ++ptrBuf, ++srcBuf) {
		if (srcBuf->mData != NULL && srcBuf->mDataByteSize > 0)
			// preserve existing buffer contents
			memmove(p, srcBuf->mData, srcBuf->mDataByteSize);
		buf->mDataByteSize = nBytes;
		buf->mData = p;
		ptrBuf->mDataByteSize = srcBuf->mDataByteSize;
		ptrBuf->mData = p;
		p += nBytes;
	}
	Byte *oldMemory = mBufferMemory;
	mBufferMemory = newMemory;
	if (inSrcList != inSetPtrList)
		inSrcList->BytesConsumed(fromByteSize);
	delete[] oldMemory;
}

void		CABufferList::DeallocateBuffers()
{
	AudioBuffer *buf = mBuffers;
	for (UInt32 i = mNumberBuffers; i--; ++buf) {
		buf->mData = NULL;
		buf->mDataByteSize = 0;
	}
	if (mBufferMemory != NULL) {
		delete[] mBufferMemory;
		mBufferMemory = NULL;
	}
    
}

extern "C" void CAShowAudioBufferList(const AudioBufferList *abl, int framesToPrint, int wordSize)
{
	printf("AudioBufferList @ %p:\n", abl);
	const AudioBuffer *buf = abl->mBuffers;
	for (UInt32 i = 0; i < abl->mNumberBuffers; ++i, ++buf) {
		printf("  [%2ld]: %2ldch, %5ld bytes @ %8p", 
			i, buf->mNumberChannels, buf->mDataByteSize, buf->mData);
		if (framesToPrint) {
			printf(":");
			Byte *p = (Byte *)buf->mData;
			for (int j = framesToPrint * buf->mNumberChannels; --j >= 0; )
				switch (wordSize) {
				case 0:
					printf(" %6.3f", *(Float32 *)p);
					p += sizeof(Float32);
					break;
				case 1:
				case -1:
					printf(" %02X", *p);
					p += 1;
					break;
				case 2:
					printf(" %04X", EndianU16_BtoN(*(UInt16 *)p));
					p += 2;
					break;
				case 3:
					printf(" %06X", (p[0] << 16) | (p[1] << 8) | p[2]);
					p += 3;
					break;
				case 4:
					printf(" %08lX", EndianU32_BtoN(*(UInt32 *)p));
					p += 4;
					break;
				case -2:
					printf(" %04X", EndianU16_LtoN(*(UInt16 *)p));
					p += 2;
					break;
				case -3:
					printf(" %06X", (p[2] << 16) | (p[1] << 8) | p[0]);
					p += 3;
					break;
				case -4:
					printf(" %08lX", EndianU32_LtoN(*(UInt32 *)p));
					p += 4;
					break;
				}
		}
		printf("\n");
	}
}

