From 9db68e7d3928f93d2ab2c7ffa1d5e248394b6fa9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20L=C3=B3pez=20Guimaraes?= <danielectra@outlook.com>
Date: Wed, 31 Jul 2024 01:31:14 +0100
Subject: [PATCH] cellMic: Handle value 0 on CELLMIC_DEVATTR_CHANVOL

If arg1 is zero, all channels of the device are affected.
---
 rpcs3/Emu/Cell/Modules/cellMic.cpp | 29 +++++++++++++++++++++++++----
 1 file changed, 25 insertions(+), 4 deletions(-)

diff --git a/rpcs3/Emu/Cell/Modules/cellMic.cpp b/rpcs3/Emu/Cell/Modules/cellMic.cpp
index dd36e32933..da4fa5930f 100644
--- a/rpcs3/Emu/Cell/Modules/cellMic.cpp
+++ b/rpcs3/Emu/Cell/Modules/cellMic.cpp
@@ -8,6 +8,8 @@
 #include <Emu/IdManager.h>
 #include <Emu/Cell/lv2/sys_event.h>
 
+#include <numeric>
+
 LOG_CHANNEL(cellMic);
 
 template<>
@@ -863,9 +865,19 @@ error_code cellMicGetDeviceAttr(s32 dev_num, CellMicDeviceAttr deviceAttributes,
 		switch (deviceAttributes)
 		{
 		case CELLMIC_DEVATTR_CHANVOL:
-			if (*arg1 == 0 || *arg1 > 2 || !arg2)
+			if (*arg1 > 2 || !arg2)
 				return CELL_MICIN_ERROR_PARAM;
-			*arg2 = ::at32(device.attr_chanvol, *arg1 - 1);
+
+			if (*arg1 == 0)
+			{
+				// Calculate average volume of the channels
+				*arg2 = std::accumulate(device.attr_chanvol.begin(), device.attr_chanvol.end(), 0) / device.attr_chanvol.size();
+			}
+			else
+			{
+				*arg2 = ::at32(device.attr_chanvol, *arg1 - 1);
+			}
+
 			break;
 		case CELLMIC_DEVATTR_LED: *arg1 = device.attr_led; break;
 		case CELLMIC_DEVATTR_GAIN: *arg1 = device.attr_gain; break;
@@ -897,9 +909,18 @@ error_code cellMicSetDeviceAttr(s32 dev_num, CellMicDeviceAttr deviceAttributes,
 	{
 	case CELLMIC_DEVATTR_CHANVOL:
 		// Used by SingStar to set the volume of each mic
-		if (arg1 == 0 || arg1 > 2)
+		if (arg1 > 2)
 			return CELL_MICIN_ERROR_PARAM;
-		::at32(device.attr_chanvol, arg1 - 1) = arg2;
+
+		if (arg1 == 0)
+		{
+			device.attr_chanvol.fill(arg2);
+		}
+		else
+		{
+			::at32(device.attr_chanvol, arg1 - 1) = arg2;
+		}
+
 		break;
 	case CELLMIC_DEVATTR_LED: device.attr_led = arg1; break;
 	case CELLMIC_DEVATTR_GAIN: device.attr_gain = arg1; break;