From 427cc598e02ce3e4cd2f64843ce721c1947218e6 Mon Sep 17 00:00:00 2001
From: Nicolas Bacca
Date: Sat, 18 May 2002 20:12:41 +0000
Subject: Big ugly hairy hack to remove Scumm class dependencies to the MidiEmu
 driver, and add streaming (ahah) emulation - someone please fix this as soon
 as possible :)

svn-id: r4349
---
 sound/mididrv.cpp | 53 ++++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 48 insertions(+), 5 deletions(-)

(limited to 'sound/mididrv.cpp')

diff --git a/sound/mididrv.cpp b/sound/mididrv.cpp
index f2aa0a43f8..65dcee84ae 100644
--- a/sound/mididrv.cpp
+++ b/sound/mididrv.cpp
@@ -964,13 +964,14 @@ static int my_midi_fm_vol_table[128] = {
 
 class MidiDriver_MIDIEMU : public MidiDriver {
 public:
-        MidiDriver_MIDIEMU();
+    MidiDriver_MIDIEMU();
 	int open(int mode);
 	void close();
 	void send(uint32 b);
 	void pause(bool pause);
 	void set_stream_callback(void *param, StreamCallback *sc);
-
+	static int midiemu_callback_thread(void *param);
+	
 private:
 	struct midi_channel {
 		int inum;
@@ -1001,9 +1002,9 @@ private:
 	StreamCallback *_stream_proc;
 	void *_stream_param;
 	int _mode;
-	FM_OPL *_opl;
 	int chp[9][3];
 	unsigned char myinsbank[128][11];
+	FM_OPL *_opl;
 	midi_channel ch[16];
 };
 
@@ -1035,8 +1036,10 @@ MidiDriver_MIDIEMU::MidiDriver_MIDIEMU(){
 }
 
 int MidiDriver_MIDIEMU::open(int mode) {
-	_opl = OPLCreate(OPL_TYPE_YM3812, 3579545, g_scumm->_system->property(OSystem::PROP_GET_SAMPLE_RATE,0));
-	g_scumm->_mixer->setup_premix((void*) this, premix_proc);
+	_opl = OPLCreate(OPL_TYPE_YM3812, 3579545, g_system->property(OSystem::PROP_GET_SAMPLE_RATE,0));
+	g_mixer->setup_premix((void*) this, premix_proc);
+	if (_stream_proc)
+		g_system->create_thread(midiemu_callback_thread, this);
 	return 0;
 }
 
@@ -1242,6 +1245,46 @@ void MidiDriver_MIDIEMU::pause(bool pause) {
 	}
 }
 
+#define NUMBER_MIDI_EVENTS 64
+
+int MidiDriver_MIDIEMU::midiemu_callback_thread(void *param) {
+	MidiDriver_MIDIEMU *driver = (MidiDriver_MIDIEMU*) param;
+	MidiEvent my_evs[NUMBER_MIDI_EVENTS];
+	bool need_midi_data = true;
+
+	for (;;) {
+		int number;
+		int i;
+
+		if (need_midi_data) {
+			number = driver->_stream_proc(driver->_stream_param, my_evs, NUMBER_MIDI_EVENTS);
+			if (!number) {
+				// No MIDI data available for the moment
+				g_system->delay_msecs(10);
+				continue;
+			}
+			need_midi_data = false;
+		}
+
+		for (i=0; i<number; i++) {
+			uint32 event;
+
+			event = my_evs[i].event;
+			if ((event>>24) == ME_TEMPO) {
+				event = (MEVT_TEMPO << 24) | (event & 0xFFFFFF);
+			}
+			driver->send(event);			
+			if (my_evs[i].delta) {
+				g_system->delay_msecs(my_evs[i].delta);
+			}
+		}
+
+		need_midi_data = true;
+	}
+
+	return 0;
+}
+
 void MidiDriver_MIDIEMU::set_stream_callback(void *param, StreamCallback *sc) {
 	_stream_param = param;
 	_stream_proc = sc;
-- 
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