SCI: Converted FreeSCI Amiga sound driver. Some cleanup.

svn-id: r45682

1 files changed, 134 insertions, 1 deletions

diff --git a/engines/sci/sfx/softseq/adlib.cpp b/engines/sci/sfx/softseq/adlib.cpp
index e21ddf11f9..a361d33104 100644
--- a/engines/sci/sfx/softseq/adlib.cpp
+++ b/engines/sci/sfx/softseq/adlib.cpp
@@ -27,9 +27,10 @@
 #include "sci/sfx/iterator.h"
 
 #include "sound/fmopl.h"
+#include "sound/softsynth/emumidi.h"
 
 #include "sci/resource.h"
-#include "sci/sfx/softseq/adlib.h"
+#include "sci/sfx/sci_midi.h"
 
 namespace Sci {
 
@@ -42,6 +43,134 @@ namespace Sci {
 // FIXME: We don't seem to be sending the polyphony init data, so disable this for now
 #define ADLIB_DISABLE_VOICE_MAPPING
 
+class MidiDriver_Adlib : public MidiDriver_Emulated {
+public:
+	enum {
+		kVoices = 9,
+		kRhythmKeys = 62
+	};
+
+	MidiDriver_Adlib(Audio::Mixer *mixer) : MidiDriver_Emulated(mixer), _playSwitch(true), _masterVolume(15), _rhythmKeyMap(0), _opl(0) { }
+	virtual ~MidiDriver_Adlib() { }
+
+	// MidiDriver
+	int open(bool isSCI0);
+	void close();
+	void send(uint32 b);
+	MidiChannel *allocateChannel() { return NULL; }
+	MidiChannel *getPercussionChannel() { return NULL; }
+
+	// AudioStream
+	bool isStereo() const { return _stereo; }
+	int getRate() const { return _mixer->getOutputRate(); }
+
+	// MidiDriver_Emulated
+	void generateSamples(int16 *buf, int len);
+
+	void setVolume(byte volume);
+	void playSwitch(bool play);
+	bool loadResource(const byte *data, uint size);
+	virtual uint32 property(int prop, uint32 param);
+
+private:
+	enum ChannelID {
+		kLeftChannel = 1,
+		kRightChannel = 2
+	};
+
+	struct AdlibOperator {
+		bool amplitudeMod;
+		bool vibrato;
+		bool envelopeType;
+		bool kbScaleRate;
+		byte frequencyMult;		// (0-15)
+		byte kbScaleLevel;		// (0-3)
+		byte totalLevel;		// (0-63, 0=max, 63=min)
+		byte attackRate;		// (0-15)
+		byte decayRate;			// (0-15)
+		byte sustainLevel;		// (0-15)
+		byte releaseRate;		// (0-15)
+		byte waveForm;			// (0-3)
+	};
+
+	struct AdlibModulator {
+		byte feedback;			// (0-7)
+		bool algorithm;
+	};
+
+	struct AdlibPatch {
+		AdlibOperator op[2];
+		AdlibModulator mod;
+	};
+
+	struct Channel {
+		uint8 patch;			// Patch setting
+		uint8 volume;			// Channel volume (0-63)
+		uint8 pan;				// Pan setting (0-127, 64 is center)
+		uint8 holdPedal;		// Hold pedal setting (0 to 63 is off, 127 to 64 is on)
+		uint8 extraVoices;		// The number of additional voices this channel optimally needs
+		uint16 pitchWheel;		// Pitch wheel setting (0-16383, 8192 is center)
+		uint8 lastVoice;		// Last voice used for this MIDI channel
+		bool enableVelocity;	// Enable velocity control (SCI0)
+
+		Channel() : patch(0), volume(63), pan(64), holdPedal(0), extraVoices(0),
+					pitchWheel(8192), lastVoice(0), enableVelocity(false) { }
+	};
+
+	struct AdlibVoice {
+		int8 channel;			// MIDI channel that this voice is assigned to or -1
+		int8 note;				// Currently playing MIDI note or -1
+		int patch;				// Currently playing patch or -1
+		uint8 velocity;			// Note velocity
+		bool isSustained;		// Flag indicating a note that is being sustained by the hold pedal
+		uint16 age;				// Age of the current note
+
+		AdlibVoice() : channel(-1), note(-1), patch(-1), velocity(0), isSustained(false), age(0) { }
+	};
+
+	bool _stereo;
+	bool _isSCI0;
+	OPL::OPL *_opl;
+	bool _playSwitch;
+	int _masterVolume;
+	Channel _channels[MIDI_CHANNELS];
+	AdlibVoice _voices[kVoices];
+	byte *_rhythmKeyMap;
+	Common::Array<AdlibPatch> _patches;
+
+	void loadInstrument(const byte *ins);
+	void voiceOn(int voice, int note, int velocity);
+	void voiceOff(int voice);
+	void setPatch(int voice, int patch);
+	void setNote(int voice, int note, bool key);
+	void setVelocity(int voice);
+	void setOperator(int oper, AdlibOperator &op);
+	void setRegister(int reg, int value, int channels = kLeftChannel | kRightChannel);
+	void renewNotes(int channel, bool key);
+	void noteOn(int channel, int note, int velocity);
+	void noteOff(int channel, int note);
+	int findVoice(int channel);
+	void voiceMapping(int channel, int voices);
+	void assignVoices(int channel, int voices);
+	void releaseVoices(int channel, int voices);
+	void donateVoices();
+	int findVoiceBasic(int channel);
+	void setVelocityReg(int regOffset, int velocity, int kbScaleLevel, int pan);
+	int calcVelocity(int voice, int op);
+};
+
+class MidiPlayer_Adlib : public MidiPlayer {
+public:
+	MidiPlayer_Adlib() { _driver = new MidiDriver_Adlib(g_system->getMixer()); }
+	int open(ResourceManager *resMan);
+	int getPlayMask() const { return 0x04; }
+	int getPolyphony() const { return MidiDriver_Adlib::kVoices; }
+	bool hasRhythmChannel() const { return false; }
+	void setVolume(byte volume) { static_cast<MidiDriver_Adlib *>(_driver)->setVolume(volume); }
+	void playSwitch(bool play) { static_cast<MidiDriver_Adlib *>(_driver)->playSwitch(play); }
+	void loadInstrument(int idx, byte *data);
+};
+
 static const byte registerOffset[MidiDriver_Adlib::kVoices] = {
 	0x00, 0x01, 0x02, 0x08, 0x09, 0x0A, 0x10, 0x11, 0x12
 };
@@ -679,4 +808,8 @@ int MidiPlayer_Adlib::open(ResourceManager *resMan) {
 	return static_cast<MidiDriver_Adlib *>(_driver)->open(getSciVersion() <= SCI_VERSION_0_LATE);
 }
 
+MidiPlayer *MidiPlayer_Adlib_create() {
+	return new MidiPlayer_Adlib();
+}
+
 } // End of namespace Sci