palmos midi driver

svn-id: r7221

1 files changed, 132 insertions, 0 deletions

diff --git a/backends/midi/ypa1.cpp b/backends/midi/ypa1.cpp
new file mode 100644
index 0000000000..6766af341f
--- /dev/null
+++ b/backends/midi/ypa1.cpp
@@ -0,0 +1,132 @@
+#include "stdafx.h"
+#include "sound/mpu401.h"
+#include "common/engine.h"	// for warning/error/debug
+
+#include "Pa1Lib.h"
+
+class MidiDriver_YamahaPa1:public MidiDriver_MPU401 {
+public:
+	MidiDriver_YamahaPa1();
+	int open();
+	void close();
+	void send(uint32 b);
+
+private:
+	UInt8 _midiHandle;
+	Boolean _isOpen;
+ };
+
+MidiDriver_YamahaPa1::MidiDriver_YamahaPa1() {
+	_isOpen = false;
+	_midiHandle = 0;
+}
+
+int MidiDriver_YamahaPa1::open()
+{
+	if (!(_isOpen = Pa1Lib_midiOpen(NULL, &_midiHandle)))
+		return MERR_DEVICE_NOT_AVAILABLE;
+
+	Pa1Lib_midiControlChange(_midiHandle,0,120,0); // all sound off
+	Pa1Lib_midiControlChange(_midiHandle,0,121,0); // reset all controller
+	Pa1Lib_midiControlChange(_midiHandle,0,123,0); // all not off
+
+	return 0;
+}
+
+void MidiDriver_YamahaPa1::close()
+{
+	if (_isOpen) {
+		Pa1Lib_midiControlChange(_midiHandle,0,120,0); // all sound off
+		Pa1Lib_midiControlChange(_midiHandle,0,121,0); // reset all controller
+		Pa1Lib_midiControlChange(_midiHandle,0,123,0); // all not off
+		Pa1Lib_midiClose(_midiHandle);
+	}
+}
+
+void MidiDriver_YamahaPa1::send(uint32 b)
+{
+	if (!_isOpen)
+		return;
+
+	UInt8 midiCmd[4];
+	UInt8 chanID,mdCmd;
+
+	midiCmd[3] = (b & 0xFF000000) >> 24;
+	midiCmd[2] = (b & 0x00FF0000) >> 16;
+	midiCmd[1] = (b & 0x0000FF00) >> 8;
+	midiCmd[0] = (b & 0x000000FF);
+	
+	chanID = (midiCmd[0] & 0x0F) ;
+	mdCmd = midiCmd[0] & 0xF0;
+	
+	switch (mdCmd) {
+		case 0x80:	// note off
+			Pa1Lib_midiNoteOff(_midiHandle, chanID, midiCmd[1], 0);
+			break;
+	
+		case 0x90:	// note on
+			Pa1Lib_midiNoteOn(_midiHandle, chanID, midiCmd[1], midiCmd[2]);
+			break;
+		
+		case 0xB0:	// control change
+			Pa1Lib_midiControlChange(_midiHandle, chanID, midiCmd[1], midiCmd[2]);
+			break;
+		
+		case 0xC0:	// progam change
+			Pa1Lib_midiProgramChange(_midiHandle, chanID, midiCmd[1]);
+			break;
+		
+		case 0xE0:	// pitchBend
+			Pa1Lib_midiPitchBend(_midiHandle, chanID, (short)(midiCmd[1] | (midiCmd[2] << 8)));
+			break;
+	}
+}
+
+MidiDriver *MidiDriver_YamahaPa1_create()
+{
+	return new MidiDriver_YamahaPa1();
+}
+
+//////////////////////////////////////////
+// thread emu
+static struct {
+	bool active;
+	int old_time;
+	int sleep;
+
+} g_thread;
+
+static bool t_first_call = false;
+
+int MidiDriver_MPU401::midi_driver_thread(void *param) {
+	MidiDriver_MPU401 *mid = (MidiDriver_MPU401 *)param;
+	int cur_time;
+
+	if (!t_first_call)	
+	{
+		g_thread.active = false;
+		g_thread.old_time = g_system->get_msecs();
+		g_thread.sleep = 10;
+		t_first_call = true;
+	}
+
+	cur_time = g_system->get_msecs();
+	if (cur_time - g_thread.old_time >= g_thread.sleep)
+		g_thread.active = true;
+
+	if (g_thread.active)
+	{
+		cur_time = g_system->get_msecs();
+		while (g_thread.old_time < cur_time) {
+			g_thread.old_time += 10;
+			// Don't use mid->_se_on_timer()
+			// We must come in through IMuseMonitor to protect
+			// against conflicts with script access to IMuse.
+			if (mid->_timer_proc)
+				(*(mid->_timer_proc)) (mid->_timer_param);
+		}
+		g_thread.active = false;
+	}
+
+	return 0;
+}
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