1 files changed, 54 insertions, 0 deletions
diff --git a/indra/newview/llappviewermacosx.cpp b/indra/newview/llappviewermacosx.cpp
index 1282e437f2..f8f8f50cd6 100644
--- a/indra/newview/llappviewermacosx.cpp
+++ b/indra/newview/llappviewermacosx.cpp
@@ -50,6 +50,7 @@
 #include <Carbon/Carbon.h>
 #include "lldir.h"
 #include <signal.h>
+#include <CoreAudio/CoreAudio.h>	// for systemwide mute
 class LLMediaCtrl;		// for LLURLDispatcher
 
 namespace 
@@ -444,6 +445,59 @@ std::string LLAppViewerMacOSX::generateSerialNumber()
 	return serial_md5;
 }
 
+static AudioDeviceID get_default_audio_output_device(void)
+{
+	AudioDeviceID device = 0;
+	UInt32 size;
+	OSStatus err;
+	
+	size = sizeof(device);
+	err = AudioHardwareGetProperty(kAudioHardwarePropertyDefaultOutputDevice, &size, &device);
+	if(err != noErr)
+	{
+		LL_DEBUGS("SystemMute") << "Couldn't get default audio output device (0x" << std::hex << err << ")" << LL_ENDL;
+	}
+	
+	return device;
+}
+
+//virtual
+void LLAppViewerMacOSX::setMasterSystemAudioMute(bool new_mute)
+{
+	AudioDeviceID device = get_default_audio_output_device();
+	
+	if(device != 0)
+	{
+		UInt32 mute = new_mute;
+		OSStatus err = AudioDeviceSetProperty(device, NULL, 0, false, kAudioDevicePropertyMute, sizeof(mute), &mute);
+		if(err != noErr)
+		{
+			LL_INFOS("SystemMute") << "Couldn't set audio mute property (0x" << std::hex << err << ")" << LL_ENDL;
+		}
+	}
+}
+
+//virtual
+bool LLAppViewerMacOSX::getMasterSystemAudioMute()
+{
+	// Assume the system isn't muted 
+	UInt32 mute = 0;
+	
+	AudioDeviceID device = get_default_audio_output_device();
+	
+	if(device != 0)
+	{
+		UInt32 size = sizeof(mute);
+		OSStatus err = AudioDeviceGetProperty(device, 0, false, kAudioDevicePropertyMute, &size, &mute);
+		if(err != noErr)
+		{
+			LL_DEBUGS("SystemMute") << "Couldn't get audio mute property (0x" << std::hex << err << ")" << LL_ENDL;
+		}
+	}
+	
+	return (mute != 0);
+}
+
 OSErr AEGURLHandler(const AppleEvent *messagein, AppleEvent *reply, long refIn)
 {
 	OSErr result = noErr;