maccore: fixed MacOSX "Snow Leopard" 10.6+ deadlock on sample-rate change submitted...

and Stephane Letz with the following details:
"When using paMacCoreChangeDeviceParameters option of PaMacCore_SetupStreamInfo, if the sample rate used in PortAudio do not match the one on the hardware, it automatically switches the hardware samplerate. This functionality stopped working on 10.6 and was blocking the application when trying to change the hardware samplerate (infinite wait) It now works fine on 10.6 as it used to on previous OSX version."

diff --git a/src/hostapi/coreaudio/pa_mac_core.c b/src/hostapi/coreaudio/pa_mac_core.c
index 0da5dc5b7d41828e38238b77ab3fe5771d89b2ee..bd509731cbf1d23b9f1abdbc4f8c07fc1142eaca 100644 (file)
--- a/src/hostapi/coreaudio/pa_mac_core.c
+++ b/src/hostapi/coreaudio/pa_mac_core.c
@@ -530,12 +530,27 @@ PaError PaMacCore_Initialize( PaUtilHostApiRepresentation **hostApi, PaHostApiIn
 {
     PaError result = paNoError;
     int i;
-    PaMacAUHAL *auhalHostApi;
+    PaMacAUHAL *auhalHostApi = NULL;
     PaDeviceInfo *deviceInfoArray;
     int unixErr;
 
     VVDBUG(("PaMacCore_Initialize(): hostApiIndex=%d\n", hostApiIndex));
-
+       
+       SInt32 major;
+       SInt32 minor;
+       Gestalt(gestaltSystemVersionMajor, &major);
+       Gestalt(gestaltSystemVersionMinor, &minor);
+       
+       // Starting with 10.6 systems, the HAL notification thread is created internally
+       if (major == 10 && minor >= 6) {
+               CFRunLoopRef theRunLoop = NULL;
+               AudioObjectPropertyAddress theAddress = { kAudioHardwarePropertyRunLoop, kAudioObjectPropertyScopeGlobal, kAudioObjectPropertyElementMaster };
+               OSStatus osErr = AudioObjectSetPropertyData (kAudioObjectSystemObject, &theAddress, 0, NULL, sizeof(CFRunLoopRef), &theRunLoop);
+               if (osErr != noErr) {
+                       goto error;
+               }
+       }
+       
     unixErr = initializeXRunListenerList();
     if( 0 != unixErr ) {
        return UNIX_ERR(unixErr);