disabled reverb effect in QuickTime / CoreAudio drivers until we figure out why they bog down the system so much; added experimental streaming mode to CoreAudio driver, which is not tested at all due to bugs in the Simon code (which right now prevent me from playing any music in Simon type games)

svn-id: r5353

1 files changed, 48 insertions, 15 deletions

diff --git a/sound/mididrv.cpp b/sound/mididrv.cpp
index 82bf133fd7..bf28e0316c 100644
--- a/sound/mididrv.cpp
+++ b/sound/mididrv.cpp
@@ -35,6 +35,12 @@
 #include "common/engine.h"	// for warning/error/debug
 #include "common/util.h"
 
+// FIXME - the following disables reverb support in the QuickTime / CoreAudio
+// midi backends. For some reasons, reverb will suck away a *lot* of CPU time.
+// Until we know for sure what is causing this and if there is a better way to
+// fix the problem, we just disable all reverb for these backends.
+#define COREAUDIO_REVERB_HACK
+
 #if defined(WIN32) && !defined(_WIN32_WCE)
 
 /* Windows MIDI driver */
@@ -788,7 +794,9 @@ void MidiDriver_QT::send(uint32 b)
 			break;
 
 		case 0x5b:									// ext effect depth
+#if !defined(COREAUDIO_REVERB_HACK)
 			NASetController(qtNoteAllocator, qtNoteChannel[chanID], kControllerReverb, midiCmd[2] << 8);
+#endif
 			break;
 
 		case 0x5d:									// chorus depth
@@ -867,11 +875,12 @@ public:
 	MidiDriver_CORE():au_MusicDevice(NULL), au_output(NULL) {
 	} int open(int mode);
 	void close();
-	void send(uint32 b);
+	void send(uint32 b) { MidiEvent e = {0, b}; send(e); }
 	void pause(bool p);
 	void set_stream_callback(void *param, StreamCallback *sc);
 	void setPitchBendRange (byte channel, uint range) { }
 
+	static OSStatus inputCallback(void *inRefCon, AudioUnitRenderActionFlags inActionFlags, const AudioTimeStamp *inTimeStamp, UInt32 inBusNumber, AudioBuffer *ioData);
 private:
 	AudioUnit au_MusicDevice;
 	AudioUnit au_output;
@@ -879,6 +888,8 @@ private:
 	StreamCallback *_stream_proc;
 	void *_stream_param;
 	int _mode;
+
+	void send(MidiEvent e);
 };
 
 
@@ -888,19 +899,28 @@ void MidiDriver_CORE::set_stream_callback(void *param, StreamCallback *sc)
 	_stream_proc = sc;
 }
 
-int MidiDriver_CORE::open(int mode)
+OSStatus MidiDriver_CORE::inputCallback(void *inRefCon, AudioUnitRenderActionFlags inActionFlags, const AudioTimeStamp *inTimeStamp, UInt32 inBusNumber, AudioBuffer *ioData)
 {
+	MidiDriver_CORE *md  = (MidiDriver_CORE *)inRefCon;
+	MidiEvent event[32];
+	
+	if (md && md->_stream_proc) {
+		int num = (md->_stream_proc)(md->_stream_param, event, 32);
+		for (int i = 0; i < num; i++)
+			md->send(event[i]);
+	}
+	return 0;
+}
 
+int MidiDriver_CORE::open(int mode)
+{
 	if (au_output != NULL)
 		return MERR_ALREADY_OPEN;
 
-	if (mode == MO_STREAMING)
-		return MERR_STREAMING_NOT_AVAILABLE;
-
 	_mode = mode;
 
 	int err;
-	struct AudioUnitConnection auconnect;
+	AudioUnitConnection auconnect;
 	ComponentDescription compdesc;
 	Component compid;
 
@@ -922,7 +942,17 @@ int MidiDriver_CORE::open(int mode)
 	auconnect.destInputNumber = 0;
 	err =
 		AudioUnitSetProperty(au_output, kAudioUnitProperty_MakeConnection, kAudioUnitScope_Input, 0,
-												 (void *)&auconnect, sizeof(struct AudioUnitConnection));
+												 (void *)&auconnect, sizeof(AudioUnitConnection));
+
+	// set streaming callback
+	if (_mode == MO_STREAMING) {
+		AudioUnitInputCallback auCallback;
+		auCallback.inputProc = inputCallback;
+		auCallback.inputProcRefCon = this;
+		err = AudioUnitSetProperty(au_output, kAudioUnitProperty_SetInputCallback, kAudioUnitScope_Input, 0,
+													 (void *)&auCallback, sizeof(AudioUnitInputCallback));
+	
+	}
 
 	// initialize the units
 	AudioUnitInitialize(au_MusicDevice);
@@ -962,16 +992,19 @@ void MidiDriver_CORE::close()
 	_mode = 0;
 }
 
-void MidiDriver_CORE::send(uint32 b)
+void MidiDriver_CORE::send(MidiEvent e)
 {
-	if (_mode != MO_SIMPLE)
-		error("MidiDriver_CORE:send called but driver is not in simple mode");
-
 	unsigned char first_byte, seccond_byte, status_byte;
-	status_byte = (b & 0x000000FF);
-	first_byte = (b & 0x0000FF00) >> 8;
-	seccond_byte = (b & 0x00FF0000) >> 16;
-	MusicDeviceMIDIEvent(au_MusicDevice, status_byte, first_byte, seccond_byte, 0);
+	status_byte = (e.event & 0x000000FF);
+	first_byte = (e.event & 0x0000FF00) >> 8;
+	seccond_byte = (e.event & 0x00FF0000) >> 16;
+
+#ifdef COREAUDIO_REVERB_HACK
+	if ((status_byte&0xF0) == 0xB0 && first_byte == 0x5b)
+		return;
+#endif
+
+	MusicDeviceMIDIEvent(au_MusicDevice, status_byte, first_byte, seccond_byte, e.delta);
 }
 
 void MidiDriver_CORE::pause(bool)