Function Spkr_DSInit

source/Speaker.cpp:873–922

//=============================================================================

bool Spkr_DSInit()
{
	//
	// Create single Apple speaker voice
	//

	if (!DSAvailable())
	{
		LogFileOutput("Spkr_DSInit: DSAvailable=0\n");
		return false;
	}

	SpeakerVoice.bIsSpeaker = true;

	HRESULT hr = DSGetSoundBuffer(&SpeakerVoice, g_dwDSSpkrBufferSize, SPKR_SAMPLE_RATE, g_nSPKR_NumChannels, "Spkr");
	if (FAILED(hr))
	{
		LogFileOutput("Spkr_DSInit: DSGetSoundBuffer failed (%08X)\n", hr);
		return false;
	}

	if (!DSZeroVoiceBuffer(&SpeakerVoice, g_dwDSSpkrBufferSize))
	{
		LogFileOutput("Spkr_DSInit: DSZeroVoiceBuffer failed\n");
		return false;
	}

	hr = SpeakerVoice.lpDSBvoice->SetVolume(SpeakerVoice.nVolume);
	LogFileOutput("Spkr_DSInit: SetVolume(%d) res = %08X\n", SpeakerVoice.nVolume, (uint32_t)hr);

	//

	DWORD dwCurrentPlayCursor, dwCurrentWriteCursor;
	hr = SpeakerVoice.lpDSBvoice->GetCurrentPosition(&dwCurrentPlayCursor, &dwCurrentWriteCursor);
	if (FAILED(hr))
		LogFileOutput("Spkr_DSInit: GetCurrentPosition failed (%08X)\n", (uint32_t)hr);
	if (SUCCEEDED(hr) && (dwCurrentPlayCursor == dwCurrentWriteCursor))
	{
		// KLUDGE: For my WinXP PC with "VIA AC'97 Enhanced Audio Controller"
		// . Not required for my Win98SE/WinXP PC with PCI "Soundblaster Live!"
		Sleep(200);

		hr = SpeakerVoice.lpDSBvoice->GetCurrentPosition(&dwCurrentPlayCursor, &dwCurrentWriteCursor);
		LogFileOutput("Spkr_DSInit: GetCurrentPosition kludge (%08X)\n", (uint32_t)hr);
		LogOutput("[DSInit] PC=%08X, WC=%08X, Diff=%08X\n", (uint32_t)dwCurrentPlayCursor,
			(uint32_t)dwCurrentWriteCursor, (uint32_t)(dwCurrentWriteCursor-dwCurrentPlayCursor));
	}

	return true;
}

static void Spkr_DSUninit()
{