From 7cc04f25ff614df96a805fb1c64b12c422e7022e Mon Sep 17 00:00:00 2001
From: Max Horn
Date: Thu, 24 Mar 2011 16:41:23 +0100
Subject: PARALLACTION: Change MidiPlayer impls to derive from
 Audio::MidiPlayer

---
 engines/parallaction/sound_br.cpp | 75 +++++++++------------------------------
 1 file changed, 16 insertions(+), 59 deletions(-)

(limited to 'engines/parallaction/sound_br.cpp')

diff --git a/engines/parallaction/sound_br.cpp b/engines/parallaction/sound_br.cpp
index c80f96b4bc..1bc085fd34 100644
--- a/engines/parallaction/sound_br.cpp
+++ b/engines/parallaction/sound_br.cpp
@@ -27,8 +27,8 @@
 #include "common/util.h"
 
 #include "audio/mixer.h"
-#include "audio/mididrv.h"
 #include "audio/midiparser.h"
+#include "audio/midiplayer.h"
 #include "audio/mods/protracker.h"
 #include "audio/decoders/raw.h"
 
@@ -201,13 +201,9 @@ MidiParser *createParser_MSC() {
 }
 
 
-class MidiPlayer_MSC : public MidiDriver_BASE {
+class MidiPlayer_MSC : public Audio::MidiPlayer {
 public:
 
-	enum {
-		NUM_CHANNELS = 16
-	};
-
 	MidiPlayer_MSC(MidiDriver *driver);
 	~MidiPlayer_MSC();
 
@@ -215,42 +211,26 @@ public:
 	void stop();
 	void pause(bool p);
 	void updateTimer();
-	void adjustVolume(int diff);
 	void setVolume(int volume);
-	int getVolume() const { return _masterVolume; }
-	void setLooping(bool loop) { _isLooping = loop; }
 
 	// MidiDriver_BASE interface
 	virtual void send(uint32 b);
-	virtual void metaEvent(byte type, byte *data, uint16 length);
 
 private:
 
 	static void timerCallback(void *p);
 	void setVolumeInternal(int volume);
 
-	Common::Mutex _mutex;
-	MidiDriver *_driver;
-	MidiParser *_parser;
 	uint8 *_midiData;
-	bool _isLooping;
-	bool _isPlaying;
 	bool _paused;
-
-	int _masterVolume;
-	MidiChannel *_channels[NUM_CHANNELS];
-	uint8 _volume[NUM_CHANNELS];
 };
 
 
 
 MidiPlayer_MSC::MidiPlayer_MSC(MidiDriver *driver)
-	: _driver(driver), _parser(0), _midiData(0), _isLooping(false), _isPlaying(false), _paused(false), _masterVolume(0) {
+	: _midiData(0), _paused(false) {
+	_driver = driver;
 	assert(_driver);
-	memset(_channels, 0, sizeof(_channels));
-	for (int i = 0; i < NUM_CHANNELS; i++) {
-		_volume[i] = 127;
-	}
 
 	int ret = _driver->open();
 	if (ret == 0) {
@@ -295,13 +275,9 @@ void MidiPlayer_MSC::play(Common::SeekableReadStream *stream) {
 }
 
 void MidiPlayer_MSC::stop() {
-	Common::StackLock lock(_mutex);
-	if (_isPlaying) {
-		_isPlaying = false;
-		_parser->unloadMusic();
-		free(_midiData);
-		_midiData = 0;
-	}
+	Audio::MidiPlayer::stop();
+	free(_midiData);
+	_midiData = 0;
 }
 
 void MidiPlayer_MSC::pause(bool p) {
@@ -320,10 +296,6 @@ void MidiPlayer_MSC::updateTimer() {
 	}
 }
 
-void MidiPlayer_MSC::adjustVolume(int diff) {
-	setVolume(_masterVolume + diff);
-}
-
 void MidiPlayer_MSC::setVolume(int volume) {
 	_masterVolume = CLIP(volume, 0, 255);
 	setVolumeInternal(_masterVolume);
@@ -331,43 +303,28 @@ void MidiPlayer_MSC::setVolume(int volume) {
 
 void MidiPlayer_MSC::setVolumeInternal(int volume) {
 	Common::StackLock lock(_mutex);
-	for (int i = 0; i < NUM_CHANNELS; ++i) {
-		if (_channels[i]) {
-			_channels[i]->volume(_volume[i] * volume / 255);
+	for (int i = 0; i < kNumChannels; ++i) {
+		if (_channelsTable[i]) {
+			_channelsTable[i]->volume(_channelsVolume[i] * volume / 255);
 		}
 	}
 }
 
 void MidiPlayer_MSC::send(uint32 b) {
+	// FIXME/TODO: Unlike Audio::MidiPlayer::send(), this code
+	// does not handle All Note Off. Is this on purpose?
+	// If not, we could simply remove this method, and use the
+	// inherited one.
 	const byte ch = b & 0x0F;
 	byte param2 = (b >> 16) & 0xFF;
 
 	switch (b & 0xFFF0) {
 	case 0x07B0: // volume change
-		_volume[ch] = param2;
+		_channelsVolume[ch] = param2;
 		break;
 	}
 
-	if (!_channels[ch]) {
-		_channels[ch] = (ch == 9) ? _driver->getPercussionChannel() : _driver->allocateChannel();
-	}
-	if (_channels[ch]) {
-		_channels[ch]->send(b);
-	}
-}
-
-void MidiPlayer_MSC::metaEvent(byte type, byte *data, uint16 length) {
-	switch (type) {
-	case 0x2F: // end of Track
-		if (_isLooping) {
-			_parser->jumpToTick(0);
-		} else {
-			stop();
-		}
-		break;
-	default:
-		break;
-	}
+	sendToChannel(ch, b);
 }
 
 void MidiPlayer_MSC::timerCallback(void *p) {
-- 
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