aboutsummaryrefslogtreecommitdiff
path: root/audio/mods/maxtrax.h
blob: bef6669d2ae53758e7855d5da6bf0b7817c1f8ff (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

// see if all engines using this class are DISABLED
#if !defined(ENABLE_KYRA)

// normal Header Guard
#elif !defined SOUND_MODS_MAXTRAX_H
#define SOUND_MODS_MAXTRAX_H

// #define MAXTRAX_HAS_MODULATION
// #define MAXTRAX_HAS_MICROTONAL

#include "audio/mods/paula.h"

namespace Audio {

class MaxTrax : public Paula {
public:
	MaxTrax(int rate, bool stereo, uint16 vBlankFreq = 50, uint16 maxScores = 128);
	virtual ~MaxTrax();

	bool load(Common::SeekableReadStream &musicData, bool loadScores = true, bool loadSamples = true);
	bool playSong(int songIndex, bool loop = false);
	void advanceSong(int advance = 1);
	int playNote(byte note, byte patch, uint16 duration, uint16 volume, bool rightSide);
	void setVolume(const byte volume) { Common::StackLock lock(_mutex); _playerCtx.volume = volume; }
	void setTempo(const uint16 tempo);
	void stopMusic();
	/**
	 * Set a callback function for sync-events.
	 * @param callback Callback function, will be called synchronously, so DONT modify the player
	 *		directly in response
	 */
	void setSignalCallback(void (*callback) (int));

protected:
	void interrupt();

private:
	enum { kNumPatches = 64, kNumVoices = 4, kNumChannels = 16, kNumExtraChannels = 1 };
	enum { kPriorityScore, kPriorityNote, kPrioritySound };

#ifdef MAXTRAX_HAS_MICROTONAL
	int16	_microtonal[128];
#endif

	struct Event {
		uint16	startTime;
		uint16	stopTime;
		byte	command;
		byte	parameter;
	};

	const struct Score {
		const Event	*events;
		uint32	numEvents;
	} *_scores;

	int _numScores;

	struct {
		uint32	sineValue;
		uint16	vBlankFreq;
		int32	ticks;
		int32	tickUnit;
		uint16	frameUnit;

		uint16	maxScoreNum;
		uint16	tempo;
		uint16	tempoInitial;
		uint16	tempoStart;
		int16	tempoDelta;
		int32	tempoTime;
		int32	tempoTicks;

		byte	volume;

		bool	filterOn;
		bool	handleVolume;
		bool	musicLoop;

		int		scoreIndex;
		const Event	*nextEvent;
		int32	nextEventTime;

		void (*syncCallBack) (int);
		const Event	*repeatPoint[4];
		byte	repeatCount[4];
	} _playerCtx;

	struct Envelope {
		uint16	duration;
		uint16	volume;
	};

	struct Patch {
		const Envelope *attackPtr;
		//Envelope *releasePtr;
		uint16	attackLen;
		uint16	releaseLen;

		int16	tune;
		uint16	volume;

		// this was the SampleData struct in the assembler source
		const int8	*samplePtr;
		uint32	sampleTotalLen;
		uint32	sampleAttackLen;
		uint16	sampleOctaves;
	} _patch[kNumPatches];

	struct ChannelContext {
		const Patch	*patch;
		uint16	regParamNumber;

		uint16	modulation;
		uint16	modulationTime;

		int16	microtonal;

		uint16	portamentoTime;

		int16	pitchBend;
		int16	pitchReal;
		int8	pitchBendRange;

		uint8	volume;
//		uint8	voicesActive;

		enum {
			kFlagRightChannel = 1 << 0,
			kFlagPortamento = 1 << 1,
			kFlagDamper = 1 << 2,
			kFlagMono = 1 << 3,
			kFlagMicrotonal = 1 << 4,
			kFlagModVolume = 1 << 5
		};
		byte	flags;
		bool	isAltered;

		uint8	lastNote;
//		uint8	program;

	} _channelCtx[kNumChannels + kNumExtraChannels];

	struct VoiceContext {
		ChannelContext *channel;
		const Patch	*patch;
		const Envelope *envelope;
//		uint32	uinqueId;
		int32	preCalcNote;
		uint32	ticksLeft;
		int32	portaTicks;
		int32	incrVolume;
//		int32	periodOffset;
		uint16	envelopeLeft;
		uint16	noteVolume;
		uint16	baseVolume;
		uint16	lastPeriod;
		byte	baseNote;
		byte	endNote;
		byte	octave;
//		byte	number;
//		byte	link;
		enum {
			kStatusFree,
			kStatusHalt,
			kStatusDecay,
			kStatusRelease,
			kStatusSustain,
			kStatusAttack,
			kStatusStart
		};
		uint8	isBlocked;
		uint8	priority;
		byte	status;
		byte	lastVolume;
		byte	tieBreak;
		bool	hasDamper;
		bool	hasPortamento;
		byte	dmaOff;

		int32	stopEventTime;
	} _voiceCtx[kNumVoices];

	void controlCh(ChannelContext &channel, byte command, byte data);
	void freePatches();
	void freeScores();
	void resetChannel(ChannelContext &chan, bool rightChannel);
	void resetPlayer();

	int8 pickvoice(uint pick, int16 pri);
	uint16 calcNote(const VoiceContext &voice);
	int8 noteOn(ChannelContext &channel, byte note, uint16 volume, uint16 pri);
	void killVoice(byte num);

	static void outPutEvent(const Event &ev, int num = -1);
	static void outPutScore(const Score &sc, int num = -1);
};
}	// End of namespace Audio

#endif // !defined SOUND_MODS_MAXTRAX_H