Function Spkr_SubmitWaveBuffer_FullSpeed

source/Speaker.cpp:489–643

// - Output these before outputting zero-pad samples.

static ULONG Spkr_SubmitWaveBuffer_FullSpeed(short* pSpeakerBuffer, ULONG nNumSamples)
{
	nDbgSpkrCnt++;

	if(!SpeakerVoice.bActive)
		return nNumSamples;

	// pSpeakerBuffer can't be NULL, as reset clears g_bFullSpeed, so 1st SpkrUpdate() never calls here
	_ASSERT(pSpeakerBuffer != NULL);

	//

	DWORD dwDSLockedBufferSize0, dwDSLockedBufferSize1;
	SHORT *pDSLockedBuffer0, *pDSLockedBuffer1;
	//bool bBufferError = false;

	DWORD dwCurrentPlayCursor, dwCurrentWriteCursor;
	HRESULT hr = SpeakerVoice.lpDSBvoice->GetCurrentPosition(&dwCurrentPlayCursor, &dwCurrentWriteCursor);
	if(FAILED(hr))
		return nNumSamples;

	if(dwByteOffset == (uint32_t)-1)
	{
		// First time in this func (probably after re-init (Spkr_SubmitWaveBuffer()))

		dwByteOffset = dwCurrentPlayCursor + (g_dwDSSpkrBufferSize/8)*3;	// Ideal: 0.375 is between 0.25 & 0.50 full
		dwByteOffset %= g_dwDSSpkrBufferSize;
		//LogOutput("[Submit_FS] PC=%08X, WC=%08X, Diff=%08X, Off=%08X, NS=%08X [REINIT]\n", dwCurrentPlayCursor, dwCurrentWriteCursor, dwCurrentWriteCursor-dwCurrentPlayCursor, dwByteOffset, nNumSamples);
	}
	else
	{
		// Check that our offset isn't between Play & Write positions

		if(dwCurrentWriteCursor > dwCurrentPlayCursor)
		{
			// |-----PxxxxxW-----|
			if((dwByteOffset > dwCurrentPlayCursor) && (dwByteOffset < dwCurrentWriteCursor))
			{
				//LogOutput("[Submit_FS] PC=%08X, WC=%08X, Diff=%08X, Off=%08X, NS=%08X xxx\n", dwCurrentPlayCursor, dwCurrentWriteCursor, dwCurrentWriteCursor-dwCurrentPlayCursor, dwByteOffset, nNumSamples);
				dwByteOffset = dwCurrentWriteCursor;
			}
		}
		else
		{
			// |xxW----------Pxxx|
			if((dwByteOffset > dwCurrentPlayCursor) || (dwByteOffset < dwCurrentWriteCursor))
			{
				//LogOutput("[Submit_FS] PC=%08X, WC=%08X, Diff=%08X, Off=%08X, NS=%08X XXX\n", dwCurrentPlayCursor, dwCurrentWriteCursor, dwCurrentWriteCursor-dwCurrentPlayCursor, dwByteOffset, nNumSamples);
				dwByteOffset = dwCurrentWriteCursor;
			}
		}
	}

	// Calc bytes remaining to be played
	int nBytesRemaining = dwByteOffset - dwCurrentPlayCursor;
	if(nBytesRemaining < 0)
		nBytesRemaining += g_dwDSSpkrBufferSize;
	if((nBytesRemaining == 0) && (dwCurrentPlayCursor != dwCurrentWriteCursor))