Patchwork [v3,24/25] ym2608intf: YM2608 core forked from MAME 0.59

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Submitter 武田 =?ISO-2022-JP?B?IBskQj1TTGkbKEI=?=
Date Oct. 28, 2009, 4:50 p.m.
Message ID <200910281650.AA00167@YOUR-BD18D6DD63.m1.interq.or.jp>
Download mbox | patch
Permalink /patch/37141/
State New
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Patch

diff --git a/qemu/hw/ym2608intf.c b/qemu/hw/ym2608intf.c
new file mode 100644
index 0000000..35e1064
--- /dev/null
+++ b/qemu/hw/ym2608intf.c
@@ -0,0 +1,234 @@ 
+/* don't support sampling rythm sound yet */
+//#define YM2608_USE_SAMPLES
+/***************************************************************************
+
+  2608intf.c
+
+  The YM2608 emulator supports up to 2 chips.
+  Each chip has the following connections:
+  - Status Read / Control Write A
+  - Port Read / Data Write A
+  - Control Write B
+  - Data Write B
+
+***************************************************************************/
+
+/* This version of 2608intf.c is a fork of the MAME 0.59 one, relicensed under the LGPL.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "hw.h"
+#include "ay8910.h"
+#include "ym2608intf.h"
+#include "fm.h"
+
+static signed short *rhythm_buf;
+
+/* Global Interface holder */
+static const struct YM2608interface *intf;
+
+#ifdef YM2608_USE_SAMPLES
+static const char *ym2608_pDrumNames[] =
+{
+	"2608_BD.wav",
+	"2608_SD.wav",
+	"2608_TOP.wav",
+	"2608_HH.wav",
+	"2608_TOM.wav",
+	"2608_RIM.wav",
+	0
+};
+
+/* definitions in commmon.c */
+struct GameSample
+{
+	int length;
+	int smpfreq;
+	int resolution;
+	signed char data[1]; /* extendable */
+};
+struct GameSamples
+{
+	int total; /* total number of samples */
+	struct GameSample *sample[1]; /* extendable */
+};
+struct GameSamples *readsamples(const char **samplenames,const char *basename)
+{
+	return 0;
+}
+#define freesamples(samps)
+#endif
+
+/*------------------------- YM2608 -------------------------------*/
+/* IRQ Handler */
+static void IRQHandler(int n,int irq)
+{
+	if(intf->handler[n]) intf->handler[n](irq);
+}
+
+/* TimerHandler from fm.c */
+static void TimerHandler(int n,int c,int count,int clock)
+{
+	if(intf->timer_handler[n]) intf->timer_handler[n](c, count);
+}
+
+/* update request from fm.c */
+void YM2608UpdateRequest(int chip)
+{
+	if(intf->update_handler[chip]) intf->update_handler[chip]();
+}
+
+int YM2608_sh_start(const struct MachineSound *msound, int rate)
+{
+	int i;
+	void *pcmbufa[YM2608_NUMBUF];
+	int  pcmsizea[YM2608_NUMBUF];
+	int rhythm_pos[6+1];
+#ifdef YM2608_USE_SAMPLES
+	int j;
+	struct GameSamples	*psSamples;
+	int total_size,r_offset,s_size;
+#endif
+
+	intf = msound->sound_interface;
+	if( intf->num > MAX_2608 ) return 1;
+
+	if (AY8910_sh_start_ym(msound, rate)) return 1;
+
+	/* stream system initialize */
+	for (i = 0;i < intf->num;i++)
+	{
+		/* setup adpcm buffers */
+		pcmbufa[i] = (void *)intf->pcmram[i];
+		pcmsizea[i] = intf->pcmram_size[i];
+	}
+
+	/* rythm rom build */
+	rhythm_buf = 0;
+#ifdef YM2608_USE_SAMPLES
+	psSamples = readsamples(ym2608_pDrumNames,"ym2608");
+	if( psSamples )
+	{
+		/* calcrate total data size */
+		total_size = 0;
+		for( i=0;i<6;i++)
+		{
+			s_size = psSamples->sample[i]->length;
+			total_size += s_size ? s_size : 1;
+		}
+		/* aloocate rythm data */
+		rhythm_buf = malloc(total_size * sizeof(signed short));
+		if( rhythm_buf==0 ) return 0;
+
+		r_offset = 0;
+		/* merge sampling data */
+		for(i=0;i<6;i++)
+		{
+			/* set start point */
+			rhythm_pos[i] = r_offset*2;
+			/* copy sample data */
+			s_size = psSamples->sample[i]->length;
+			if(s_size && psSamples->sample[i]->data)
+			{
+				if( psSamples->sample[i]->resolution==16 )
+				{
+					signed short *s_ptr = (signed short *)psSamples->sample[i]->data;
+					for(j=0;j<s_size;j++) rhythm_buf[r_offset++] = *s_ptr++;
+				}else{
+					signed char *s_ptr = (signed char *)psSamples->sample[i]->data;
+					for(j=0;j<s_size;j++) rhythm_buf[r_offset++] = (*s_ptr++)*0x0101;
+				}
+			}else rhythm_buf[r_offset++] = 0;
+			/* set end point */
+			rhythm_pos[i+1] = r_offset*2;
+		}
+		freesamples( psSamples );
+	}else
+	{
+#endif
+		/* aloocate rythm data */
+		rhythm_buf = malloc(6 * sizeof(signed short));
+		if( rhythm_buf==0 ) return 0;
+		for(i=0;i<6;i++)
+		{
+			/* set start point */
+			rhythm_pos[i] = i*2;
+			rhythm_buf[i] = 0;
+			/* set end point */
+			rhythm_pos[i+1] = (i+1)*2;
+		}
+#ifdef YM2608_USE_SAMPLES
+	}
+#endif
+
+	/**** initialize YM2608 ****/
+	if (YM2608Init(intf->num,intf->baseclock,rate,
+		           pcmbufa,pcmsizea,rhythm_buf,rhythm_pos,
+		           TimerHandler,IRQHandler) == 0)
+		return 0;
+
+	/* error */
+	return 1;
+}
+
+/************************************************/
+/* Sound Hardware Stop							*/
+/************************************************/
+void YM2608_sh_stop(void)
+{
+	YM2608Shutdown();
+	if( rhythm_buf ) free(rhythm_buf);
+	rhythm_buf = 0;
+	AY8910_sh_stop_ym();
+}
+/* reset */
+void YM2608_sh_reset(void)
+{
+	int i;
+
+	for (i = 0;i < intf->num;i++)
+		YM2608ResetChip(i);
+}
+
+void YM2608_sh_postload(void)
+{
+	int i;
+
+	for (i = 0;i < intf->num;i++) {
+		YM2608_postload(i);
+	}
+}
+
+void YM2608_sh_save_state(QEMUFile* f)
+{
+	int i;
+
+	for (i = 0;i < intf->num;i++) {
+		YM2608_save_state(f, i);
+	}
+}
+
+int YM2608_sh_load_state(QEMUFile* f)
+{
+	int i, ret = 0;
+
+	for (i = 0;i < intf->num;i++) {
+		ret |= YM2608_load_state(f, i);
+	}
+	return ret;
+}
+
+/**************** end of file ****************/
+
diff --git a/qemu/hw/ym2608intf.h b/qemu/hw/ym2608intf.h
new file mode 100644
index 0000000..ca83102
--- /dev/null
+++ b/qemu/hw/ym2608intf.h
@@ -0,0 +1,47 @@ 
+#ifndef __2608INTF_H__
+#define __2608INTF_H__
+
+#include "hw.h"
+#include "fm.h"
+#include "ay8910.h"
+#include "fm_def.h"
+
+#define   MAX_2608    (2)
+
+#ifndef VOL_YM3012
+/* #define YM3014_VOL(Vol,Pan) VOL_YM3012((Vol)/2,Pan,(Vol)/2,Pan) */
+#define YM3012_VOL(LVol,LPan,RVol,RPan) (MIXER(LVol,LPan)|(MIXER(RVol,RPan) << 16))
+#endif
+
+struct YM2608interface{
+	int num;	/* total number of 8910 in the machine */
+	int baseclock;
+	mem_read_handler portAread[MAX_8910];
+	mem_read_handler portBread[MAX_8910];
+	mem_write_handler portAwrite[MAX_8910];
+	mem_write_handler portBwrite[MAX_8910];
+	void ( *handler[MAX_8910] )( int irq );	/* IRQ handler for the YM2608 */
+	void ( *timer_handler[MAX_8910] )( int c, int count );
+	void ( *update_handler[MAX_8910] )( void );
+	unsigned char *pcmram[MAX_2608];
+	int pcmram_size[MAX_2608];
+};
+
+/************************************************/
+/* Sound Hardware Start							*/
+/************************************************/
+int YM2608_sh_start(const struct MachineSound *msound, int rate);
+
+/************************************************/
+/* Sound Hardware Stop							*/
+/************************************************/
+void YM2608_sh_stop(void);
+
+void YM2608_sh_reset(void);
+
+void YM2608_sh_postload(void);
+void YM2608_sh_save_state(QEMUFile* f);
+int YM2608_sh_load_state(QEMUFile* f);
+
+#endif
+/**************** end of file ****************/