From ce99f41240e00d85f2b89da7885a016631af617a Mon Sep 17 00:00:00 2001
From: LAGonauta <lagonauta@gmail.com>
Date: Fri, 11 Sep 2015 10:46:32 -0300
Subject: [PATCH 1/2] Added X-Fi check and now Surround FLOAT is converted to
 SHORT

---
 Source/Core/AudioCommon/OpenALStream.cpp | 43 +++++++++++++++++++++++++++++---
 Source/Core/AudioCommon/OpenALStream.h   |  2 ++
 2 files changed, 41 insertions(+), 4 deletions(-)

diff --git a/Source/Core/AudioCommon/OpenALStream.cpp b/Source/Core/AudioCommon/OpenALStream.cpp
index 66c7caf..add041b 100644
--- a/Source/Core/AudioCommon/OpenALStream.cpp
+++ b/Source/Core/AudioCommon/OpenALStream.cpp
@@ -146,18 +146,39 @@ void OpenALStream::SoundLoop()
 	memset(uiBuffers, 0, numBuffers * sizeof(ALuint));
 	uiSource = 0;
 
+	// Checks if a X-Fi is being used. If it is, disable FLOAT32 support.
+	if (strstr(alGetString(AL_RENDERER), "X-Fi") != NULL)
+	{
+		float32_capable = false;
+	}
+
 	// Generate some AL Buffers for streaming
 	alGenBuffers(numBuffers, (ALuint *)uiBuffers);
 	// Generate a Source to playback the Buffers
 	alGenSources(1, &uiSource);
 
 	// Short Silence
-	memset(sampleBuffer, 0, OAL_MAX_SAMPLES * numBuffers * FRAME_SURROUND_FLOAT);
+	if (float32_capable)
+	{
+		memset(sampleBuffer, 0, OAL_MAX_SAMPLES * numBuffers * FRAME_SURROUND_FLOAT);
+	}
+	else
+	{
+		memset(sampleBuffer, 0, OAL_MAX_SAMPLES * numBuffers * FRAME_SURROUND_SHORT);
+	}
 	memset(realtimeBuffer, 0, OAL_MAX_SAMPLES * FRAME_STEREO_SHORT);
+
 	for (int i = 0; i < numBuffers; i++)
 	{
 		if (surround_capable)
-			alBufferData(uiBuffers[i], AL_FORMAT_51CHN32, sampleBuffer, 4 * FRAME_SURROUND_FLOAT, ulFrequency);
+			if (float32_capable)
+			{
+				alBufferData(uiBuffers[i], AL_FORMAT_51CHN32, sampleBuffer, 4 * FRAME_SURROUND_FLOAT, ulFrequency);
+			}
+			else
+			{
+				alBufferData(uiBuffers[i], AL_FORMAT_51CHN16, sampleBuffer, 4 * FRAME_SURROUND_SHORT, ulFrequency);
+			}
 		else
 			alBufferData(uiBuffers[i], AL_FORMAT_STEREO16, realtimeBuffer, 4 * FRAME_STEREO_SHORT, ulFrequency);
 	}
@@ -252,15 +273,29 @@ void OpenALStream::SoundLoop()
 			{
 				float dpl2[OAL_MAX_SAMPLES * OAL_MAX_BUFFERS * SURROUND_CHANNELS];
 				DPL2Decode(sampleBuffer, nSamples, dpl2);
+
 				// zero-out the subwoofer channel - DPL2Decode generates a pretty
 				// good 5.0 but not a good 5.1 output.  Sadly there is not a 5.0
 				// AL_FORMAT_50CHN32 to make this super-explicit.
 				// DPL2Decode output: LEFTFRONT, RIGHTFRONT, CENTREFRONT, (sub), LEFTREAR, RIGHTREAR
 				for (u32 i = 0; i < nSamples; ++i)
 				{
-					dpl2[i*SURROUND_CHANNELS + 3 /*sub/lfe*/] = 0.0f;
+					dpl2[i*SURROUND_CHANNELS + 3 /*sub/lfe*/] = 0.0;
+				}
+
+				if (float32_capable)
+				{
+					alBufferData(uiBufferTemp[iBuffersFilled], AL_FORMAT_51CHN32, dpl2, nSamples * FRAME_SURROUND_FLOAT, ulFrequency);
+				}
+				else
+				{
+					short surround_short[OAL_MAX_SAMPLES * SURROUND_CHANNELS * OAL_MAX_BUFFERS];
+					for (u32 i = 0; i < nSamples * SURROUND_CHANNELS; ++i)
+						surround_short[i] = (short)((float)dpl2[i] * (1 << 15));
+
+					alBufferData(uiBufferTemp[iBuffersFilled], AL_FORMAT_51CHN16, surround_short, nSamples * FRAME_SURROUND_SHORT, ulFrequency);
 				}
-				alBufferData(uiBufferTemp[iBuffersFilled], AL_FORMAT_51CHN32, dpl2, nSamples * FRAME_SURROUND_FLOAT, ulFrequency);
+
 				ALenum err = alGetError();
 				if (err == AL_INVALID_ENUM)
 				{
diff --git a/Source/Core/AudioCommon/OpenALStream.h b/Source/Core/AudioCommon/OpenALStream.h
index e961900..17302b8 100644
--- a/Source/Core/AudioCommon/OpenALStream.h
+++ b/Source/Core/AudioCommon/OpenALStream.h
@@ -47,9 +47,11 @@
 #define SURROUND_CHANNELS       6   // number of channels in surround mode
 #define SIZE_SHORT              2
 #define SIZE_FLOAT              4   // size of a float in bytes
+#define SIZE_INT				4
 #define FRAME_STEREO_SHORT      STEREO_CHANNELS * SIZE_SHORT
 #define FRAME_STEREO_FLOAT      STEREO_CHANNELS * SIZE_FLOAT
 #define FRAME_SURROUND_FLOAT    SURROUND_CHANNELS * SIZE_FLOAT
+#define FRAME_SURROUND_SHORT    SURROUND_CHANNELS * SIZE_SHORT
 #endif
 
 class OpenALStream final : public SoundStream
-- 
2.5.2.windows.1