Add fmopl files from ScummVM.

Subversion-branch: /branches/opl-branch
Subversion-revision: 1445

1 files changed, 173 insertions, 0 deletions

diff --git a/opl/fmopl.h b/opl/fmopl.h
new file mode 100644
index 00000000..1c5e5e9f
--- /dev/null
+++ b/opl/fmopl.h
@@ -0,0 +1,173 @@
+/* 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.
+ *
+ * $URL: http://scummvm.svn.sourceforge.net/svnroot/scummvm/scummvm/trunk/sound/fmopl.h $
+ * $Id: fmopl.h 38211 2009-02-15 10:07:50Z sev $
+ *
+ * LGPL licensed version of MAMEs fmopl (V0.37a modified) by
+ * Tatsuyuki Satoh. Included from LGPL'ed AdPlug.
+ */
+
+
+#ifndef SOUND_FMOPL_H
+#define SOUND_FMOPL_H
+
+#include "common/scummsys.h"
+#include "common/util.h"
+
+enum {
+	FMOPL_ENV_BITS_HQ = 16,
+	FMOPL_ENV_BITS_MQ = 8,
+	FMOPL_ENV_BITS_LQ = 8,
+	FMOPL_EG_ENT_HQ = 4096,
+	FMOPL_EG_ENT_MQ = 1024,
+	FMOPL_EG_ENT_LQ = 128
+};
+
+
+typedef void (*OPL_TIMERHANDLER)(int channel,double interval_Sec);
+typedef void (*OPL_IRQHANDLER)(int param,int irq);
+typedef void (*OPL_UPDATEHANDLER)(int param,int min_interval_us);
+
+#define OPL_TYPE_WAVESEL   0x01  /* waveform select    */
+
+/* Saving is necessary for member of the 'R' mark for suspend/resume */
+/* ---------- OPL one of slot  ---------- */
+typedef struct fm_opl_slot {
+	int TL;		/* total level     :TL << 8				*/
+	int TLL;	/* adjusted now TL						*/
+	uint8 KSR;	/* key scale rate  :(shift down bit)	*/
+	int *AR;	/* attack rate     :&AR_TABLE[AR<<2]	*/
+	int *DR;	/* decay rate      :&DR_TABLE[DR<<2]	*/
+	int SL;		/* sustain level   :SL_TABLE[SL]		*/
+	int *RR;	/* release rate    :&DR_TABLE[RR<<2]	*/
+	uint8 ksl;	/* keyscale level  :(shift down bits)	*/
+	uint8 ksr;	/* key scale rate  :kcode>>KSR			*/
+	uint mul;	/* multiple        :ML_TABLE[ML]		*/
+	uint Cnt;	/* frequency count						*/
+	uint Incr;	/* frequency step						*/
+
+	/* envelope generator state */
+	uint8 eg_typ;/* envelope type flag					*/
+	uint8 evm;	/* envelope phase						*/
+	int evc;	/* envelope counter						*/
+	int eve;	/* envelope counter end point			*/
+	int evs;	/* envelope counter step				*/
+	int evsa;	/* envelope step for AR :AR[ksr]		*/
+	int evsd;	/* envelope step for DR :DR[ksr]		*/
+	int evsr;	/* envelope step for RR :RR[ksr]		*/
+
+	/* LFO */
+	uint8 ams;		/* ams flag                            */
+	uint8 vib;		/* vibrate flag                        */
+	/* wave selector */
+	int **wavetable;
+} OPL_SLOT;
+
+/* ---------- OPL one of channel  ---------- */
+typedef struct fm_opl_channel {
+	OPL_SLOT SLOT[2];
+	uint8 CON;			/* connection type					*/
+	uint8 FB;			/* feed back       :(shift down bit)*/
+	int *connect1;		/* slot1 output pointer				*/
+	int *connect2;		/* slot2 output pointer				*/
+	int op1_out[2];		/* slot1 output for selfeedback		*/
+
+	/* phase generator state */
+	uint block_fnum;	/* block+fnum						*/
+	uint8 kcode;		/* key code        : KeyScaleCode	*/
+	uint fc;			/* Freq. Increment base				*/
+	uint ksl_base;		/* KeyScaleLevel Base step			*/
+	uint8 keyon;		/* key on/off flag					*/
+} OPL_CH;
+
+/* OPL state */
+typedef struct fm_opl_f {
+	uint8 type;			/* chip type                         */
+	int clock;			/* master clock  (Hz)                */
+	int rate;			/* sampling rate (Hz)                */
+	double freqbase;	/* frequency base                    */
+	double TimerBase;	/* Timer base time (==sampling time) */
+	uint8 address;		/* address register                  */
+	uint8 status;		/* status flag                       */
+	uint8 statusmask;	/* status mask                       */
+	uint mode;			/* Reg.08 : CSM , notesel,etc.       */
+
+	/* Timer */
+	int T[2];			/* timer counter                     */
+	uint8 st[2];		/* timer enable                      */
+
+	/* FM channel slots */
+	OPL_CH *P_CH;		/* pointer of CH                     */
+	int	max_ch;			/* maximum channel                   */
+
+	/* Rythm sention */
+	uint8 rythm;		/* Rythm mode , key flag */
+
+	/* time tables */
+	int AR_TABLE[76];	/* atttack rate tables				*/
+	int DR_TABLE[76];	/* decay rate tables				*/
+	uint FN_TABLE[1024];/* fnumber -> increment counter		*/
+
+	/* LFO */
+	int *ams_table;
+	int *vib_table;
+	int amsCnt;
+	int amsIncr;
+	int vibCnt;
+	int vibIncr;
+
+	/* wave selector enable flag */
+	uint8 wavesel;
+
+	/* external event callback handler */
+	OPL_TIMERHANDLER  TimerHandler;		/* TIMER handler   */
+	int TimerParam;						/* TIMER parameter */
+	OPL_IRQHANDLER    IRQHandler;		/* IRQ handler    */
+	int IRQParam;						/* IRQ parameter  */
+	OPL_UPDATEHANDLER UpdateHandler;	/* stream update handler   */
+	int UpdateParam;					/* stream update parameter */
+
+	Common::RandomSource rnd;
+} FM_OPL;
+
+/* ---------- Generic interface section ---------- */
+#define OPL_TYPE_YM3526 (0)
+#define OPL_TYPE_YM3812 (OPL_TYPE_WAVESEL)
+
+void OPLBuildTables(int ENV_BITS_PARAM, int EG_ENT_PARAM);
+
+FM_OPL *OPLCreate(int type, int clock, int rate);
+void OPLDestroy(FM_OPL *OPL);
+void OPLSetTimerHandler(FM_OPL *OPL, OPL_TIMERHANDLER TimerHandler, int channelOffset);
+void OPLSetIRQHandler(FM_OPL *OPL, OPL_IRQHANDLER IRQHandler, int param);
+void OPLSetUpdateHandler(FM_OPL *OPL, OPL_UPDATEHANDLER UpdateHandler, int param);
+
+void OPLResetChip(FM_OPL *OPL);
+int OPLWrite(FM_OPL *OPL, int a, int v);
+unsigned char OPLRead(FM_OPL *OPL, int a);
+int OPLTimerOver(FM_OPL *OPL, int c);
+void OPLWriteReg(FM_OPL *OPL, int r, int v);
+void YM3812UpdateOne(FM_OPL *OPL, int16 *buffer, int length, int interleave = 0);
+
+// Factory method
+FM_OPL *makeAdlibOPL(int rate);
+
+#endif