From 7b408743092280afb79aac8a4f6d1f43b96f6bc3 Mon Sep 17 00:00:00 2001
From: Pierre Bourdon <delroth@gmail.com>
Date: Sat, 6 Jul 2013 12:53:38 +0200
Subject: [PATCH] Implement AX command 0x11 (SET_OPPOSITE_LR)

---
 .../Core/Src/HW/DSPHLE/UCodes/UCode_AX.cpp     | 18 +++++++++++++++++-
 .../Core/Core/Src/HW/DSPHLE/UCodes/UCode_AX.h  |  3 ++-
 .../Core/Src/HW/DSPHLE/UCodes/UCode_AX_Voice.h |  2 ++
 3 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/Source/Core/Core/Src/HW/DSPHLE/UCodes/UCode_AX.cpp b/Source/Core/Core/Src/HW/DSPHLE/UCodes/UCode_AX.cpp
index e28d5a32ae..411624a714 100644
--- a/Source/Core/Core/Src/HW/DSPHLE/UCodes/UCode_AX.cpp
+++ b/Source/Core/Core/Src/HW/DSPHLE/UCodes/UCode_AX.cpp
@@ -239,7 +239,11 @@ void CUCode_AX::HandleCommandList()
 				MixAUXBLR(HILO_TO_32(addr), HILO_TO_32(addr2));
 				break;
 
-			case CMD_UNK_11: curr_idx += 2; break;
+			case CMD_SET_OPPOSITE_LR:
+				addr_hi = m_cmdlist[curr_idx++];
+				addr_lo = m_cmdlist[curr_idx++];
+				SetOppositeLR(HILO_TO_32(addr));
+				break;
 
 			case CMD_UNK_12:
 			{
@@ -589,6 +593,18 @@ void CUCode_AX::MixAUXBLR(u32 ul_addr, u32 dl_addr)
 	}
 }
 
+void CUCode_AX::SetOppositeLR(u32 src_addr)
+{
+	int* ptr = (int*)HLEMemory_Get_Pointer(src_addr);
+	for (u32 i = 0; i < 5 * 32; ++i)
+	{
+		int inp = Common::swap32(*ptr++);
+		m_samples_left[i] = -inp;
+		m_samples_right[i] = inp;
+		m_samples_surround[i] = 0;
+	}
+}
+
 void CUCode_AX::SendAUXAndMix(u32 main_auxa_up, u32 auxb_s_up, u32 main_l_dl,
                               u32 main_r_dl, u32 auxb_l_dl, u32 auxb_r_dl)
 {
diff --git a/Source/Core/Core/Src/HW/DSPHLE/UCodes/UCode_AX.h b/Source/Core/Core/Src/HW/DSPHLE/UCodes/UCode_AX.h
index ae2ada78fd..5af2daed12 100644
--- a/Source/Core/Core/Src/HW/DSPHLE/UCodes/UCode_AX.h
+++ b/Source/Core/Core/Src/HW/DSPHLE/UCodes/UCode_AX.h
@@ -147,6 +147,7 @@ protected:
 	void SetMainLR(u32 src_addr);
 	void OutputSamples(u32 out_addr, u32 surround_addr);
 	void MixAUXBLR(u32 ul_addr, u32 dl_addr);
+	void SetOppositeLR(u32 src_addr);
 	void SendAUXAndMix(u32 main_auxa_up, u32 auxb_s_up, u32 main_l_dl,
 	                   u32 main_r_dl, u32 auxb_l_dl, u32 auxb_r_dl);
 
@@ -173,7 +174,7 @@ private:
 		CMD_OUTPUT = 0x0E,
 		CMD_END = 0x0F,
 		CMD_MIX_AUXB_LR = 0x10,
-		CMD_UNK_11 = 0x11,
+		CMD_SET_OPPOSITE_LR = 0x11,
 		CMD_UNK_12 = 0x12,
 		CMD_SEND_AUX_AND_MIX = 0x13,
 	};
diff --git a/Source/Core/Core/Src/HW/DSPHLE/UCodes/UCode_AX_Voice.h b/Source/Core/Core/Src/HW/DSPHLE/UCodes/UCode_AX_Voice.h
index 56d736c399..a353f0d02b 100644
--- a/Source/Core/Core/Src/HW/DSPHLE/UCodes/UCode_AX_Voice.h
+++ b/Source/Core/Core/Src/HW/DSPHLE/UCodes/UCode_AX_Voice.h
@@ -458,7 +458,9 @@ void ProcessVoice(PB_TYPE& pb, const AXBuffers& buffers, u16 count, AXMixControl
 
 	// Optionally, execute a low pass filter
 	if (pb.lpf.enabled)
+	{
 		pb.lpf.yn1 = LowPassFilter(samples, count, pb.lpf.yn1, pb.lpf.a0, pb.lpf.b0);
+	}
 
 	// Mix LRS, AUXA and AUXB depending on mixer_control
 	// TODO: Handle DPL2 on AUXB.