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+/* Copyright (c) 2003-2005 Various contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#ifndef MT32EMU_TABLES_H
+#define MT32EMU_TABLES_H
+
+namespace MT32Emu {
+
+// Mathematical constants
+const double DOUBLE_PI = 3.1415926535897932384626433832795;
+const double DOUBLE_LN = 2.3025850929940456840179914546844;
+const float FLOAT_PI = 3.1415926535897932384626433832795f;
+const float FLOAT_LN = 2.3025850929940456840179914546844f;
+
+// Filter settings
+const int FILTERGRAN = 512;
+
+// Amplitude of waveform generator
+// FIXME: This value is the amplitude possible whilst avoiding
+// overdriven values immediately after filtering when playing
+// back SQ3MT.MID. Needs to be checked.
+const int WGAMP = 12382;
+
+const int MIDDLEC = 60;
+const int MIDDLEA = 69; // By this I mean "A above middle C"
+
+// FIXME:KG: may only need to do 12 to 108
+// 12..108 is the range allowed by note on commands, but the key can be modified by pitch keyfollow
+// and adjustment for timbre pitch, so the results can be outside that range.
+// Should we move it (by octave) into the 12..108 range, or keep it in 0..127 range,
+// or something else altogether?
+const int LOWEST_NOTE = 12;
+const int HIGHEST_NOTE = 127;
+const int NUM_NOTES = HIGHEST_NOTE - LOWEST_NOTE + 1; // Number of slots for note LUT
+
+class Synth;
+
+struct NoteLookup {
+	Bit32u div2;
+	Bit32u *wavTable;
+	Bit32s sawTable[101];
+	int filtTable[2][201];
+	int nfiltTable[101][101];
+	Bit16s *waveforms[3];
+	Bit32u waveformSize[3];
+};
+
+struct KeyLookup {
+	Bit32s envTimeMult[5]; // For envelope time adjustment for key pressed
+	Bit32s envDepthMult[5];
+};
+
+class Tables {
+	float initialisedSampleRate;
+	float initialisedMasterTune;
+	void initMT32ConstantTables(Synth *synth);
+	static Bit16s clampWF(Synth *synth, const char *n, float ampVal, double input);
+	static File *initWave(Synth *synth, NoteLookup *noteLookup, float ampsize, float div2, File *file);
+	bool initNotes(Synth *synth, PCMWaveEntry *pcmWaves, float rate, float tuning);
+	void initEnvelopes(float sampleRate);
+	void initFiltCoeff(float samplerate);
+public:
+	// Constant LUTs
+	Bit32s tvfKeyfollowMult[217];
+	Bit32s tvfVelfollowMult[128][101];
+	Bit32s tvfBiasMult[15][128];
+	Bit32u tvaVelfollowMult[128][101];
+	Bit32s tvaBiasMult[13][128];
+	Bit16s noiseBuf[MAX_SAMPLE_OUTPUT];
+	Bit16s sintable[65536];
+	Bit32s pitchEnvVal[16][101];
+	Bit32s envTimeVelfollowMult[5][128];
+	Bit32s pwVelfollowAdd[15][128];
+	float resonanceFactor[31];
+	Bit32u lfoShift[101][101];
+	Bit32s pwFactor[101];
+	Bit32s volumeMult[101];
+
+	// LUTs varying with sample rate
+	Bit32u envTime[101];
+	Bit32u envDeltaMaxTime[101];
+	Bit32u envDecayTime[101];
+	Bit32u lfoPeriod[101];
+	float filtCoeff[FILTERGRAN][31][8];
+
+	// Various LUTs for each note and key
+	NoteLookup noteLookups[NUM_NOTES];
+	KeyLookup keyLookups[97];
+
+	Tables();
+	bool init(Synth *synth, PCMWaveEntry *pcmWaves, float sampleRate, float masterTune);
+	File *initNote(Synth *synth, NoteLookup *noteLookup, float note, float rate, float tuning, PCMWaveEntry *pcmWaves, File *file);
+	void freeNotes();
+};
+
+}
+
+#endif