From b6cf04bb0e4e511ffa795ee1cb8a11c70169500d Mon Sep 17 00:00:00 2001
From: Martin Kiewitz <m_kiewitz@users.sourceforge.net>
Date: Wed, 1 Jul 2015 01:30:12 +0200
Subject: [PATCH] AMAZON: implement proper AdLib support (Miles)

implement proper AdLib support
game uses MIDPAK, which seems to be basically Miles Audio too
instrument data was hidden inside MIDIDRV.AP
thanks to dreammaster for extracting the files
---
 engines/access/sound.cpp | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/engines/access/sound.cpp b/engines/access/sound.cpp
index da267bdc4c61..89fd4fe66e34 100644
--- a/engines/access/sound.cpp
+++ b/engines/access/sound.cpp
@@ -21,9 +21,12 @@
  */
 
 #include "common/algorithm.h"
+#include "common/config-manager.h"
 #include "audio/mixer.h"
 #include "audio/decoders/raw.h"
 #include "audio/decoders/wave.h"
+// Miles Audio
+#include "audio/miles.h"
 #include "access/access.h"
 #include "access/sound.h"
 
@@ -194,9 +197,41 @@ MusicManager::MusicManager(AccessEngine *vm) : _vm(vm) {
 	_music = nullptr;
 	_tempMusic = nullptr;
 	_isLooping = false;
+	_driver = nullptr;
 
+	MidiDriver::DeviceHandle dev = MidiDriver::detectDevice(MDT_MIDI | MDT_ADLIB | MDT_PREFER_MT32);
+	MusicType musicType = MidiDriver::getMusicType(dev);
+
+	// Amazon Guardians of Eden uses MIDPAK inside MIDIDRV.AP
+	// Amazon Guardians of Eden possibly used MIDPAK as well
+	// AdLib patches are inside MIDIDRV.AP too, 2nd resource file
+	switch (musicType) {
+	case MT_ADLIB: {
+		Resource   *midiDrvResource = _vm->_files->loadFile(92, 1);
+		const byte *adLibInstrumentData = midiDrvResource->data();
+		uint32      adLibInstrumentDataSize = midiDrvResource->_size;
+
+		_driver = Audio::MidiDriver_Miles_AdLib_create("", "", adLibInstrumentData, adLibInstrumentDataSize);
+
+		delete midiDrvResource;
+		break;
+	}
+	case MT_MT32:
+		_driver = Audio::MidiDriver_Miles_MT32_create("");
+		_nativeMT32 = true;
+		break;
+	case MT_GM:
+		if (ConfMan.getBool("native_mt32")) {
+			_driver = Audio::MidiDriver_Miles_MT32_create("");
+			_nativeMT32 = true;
+		}
+		break;
+	}
+
+#if 0
 	MidiPlayer::createDriver();
 	MidiDriver::detectDevice(MDT_MIDI | MDT_ADLIB | MDT_PREFER_GM);
+#endif
 
 	int retValue = _driver->open();
 	if (retValue == 0) {
@@ -215,11 +250,15 @@ MusicManager::~MusicManager() {
 }
 
 void MusicManager::send(uint32 b) {
+	// Pass data directly to driver
+	_driver->send(b);
+#if 0
 	if ((b & 0xF0) == 0xC0 && !_nativeMT32) {
 		b = (b & 0xFFFF00FF) | MidiDriver::_mt32ToGm[(b >> 8) & 0xFF] << 8;
 	}
 
 	Audio::MidiPlayer::send(b);
+#endif
 }
 
 void MusicManager::midiPlay() {