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-rw-r--r--src/devices/sound/vrender0.cpp250
1 files changed, 250 insertions, 0 deletions
diff --git a/src/devices/sound/vrender0.cpp b/src/devices/sound/vrender0.cpp
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+++ b/src/devices/sound/vrender0.cpp
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+// license:BSD-3-Clause
+// copyright-holders:ElSemi
+#include "emu.h"
+#include "vrender0.h"
+
+/***********************************
+ VRENDER ZERO
+ AUDIO EMULATION
+************************************/
+/************
+MISSING:
+envelopes
+reverb
+interrupts
+*************/
+
+//Correct table thanks to Evoga
+//they left a ulaw<->linear conversion tool inside the roms
+static const unsigned short ULawTo16[]=
+{
+ 0x8000,0x8400,0x8800,0x8C00,0x9000,0x9400,0x9800,0x9C00,
+ 0xA000,0xA400,0xA800,0xAC00,0xB000,0xB400,0xB800,0xBC00,
+ 0x4000,0x4400,0x4800,0x4C00,0x5000,0x5400,0x5800,0x5C00,
+ 0x6000,0x6400,0x6800,0x6C00,0x7000,0x7400,0x7800,0x7C00,
+ 0xC000,0xC200,0xC400,0xC600,0xC800,0xCA00,0xCC00,0xCE00,
+ 0xD000,0xD200,0xD400,0xD600,0xD800,0xDA00,0xDC00,0xDE00,
+ 0x2000,0x2200,0x2400,0x2600,0x2800,0x2A00,0x2C00,0x2E00,
+ 0x3000,0x3200,0x3400,0x3600,0x3800,0x3A00,0x3C00,0x3E00,
+ 0xE000,0xE100,0xE200,0xE300,0xE400,0xE500,0xE600,0xE700,
+ 0xE800,0xE900,0xEA00,0xEB00,0xEC00,0xED00,0xEE00,0xEF00,
+ 0x1000,0x1100,0x1200,0x1300,0x1400,0x1500,0x1600,0x1700,
+ 0x1800,0x1900,0x1A00,0x1B00,0x1C00,0x1D00,0x1E00,0x1F00,
+ 0xF000,0xF080,0xF100,0xF180,0xF200,0xF280,0xF300,0xF380,
+ 0xF400,0xF480,0xF500,0xF580,0xF600,0xF680,0xF700,0xF780,
+ 0x0800,0x0880,0x0900,0x0980,0x0A00,0x0A80,0x0B00,0x0B80,
+ 0x0C00,0x0C80,0x0D00,0x0D80,0x0E00,0x0E80,0x0F00,0x0F80,
+ 0xF800,0xF840,0xF880,0xF8C0,0xF900,0xF940,0xF980,0xF9C0,
+ 0xFA00,0xFA40,0xFA80,0xFAC0,0xFB00,0xFB40,0xFB80,0xFBC0,
+ 0x0400,0x0440,0x0480,0x04C0,0x0500,0x0540,0x0580,0x05C0,
+ 0x0600,0x0640,0x0680,0x06C0,0x0700,0x0740,0x0780,0x07C0,
+ 0xFC00,0xFC20,0xFC40,0xFC60,0xFC80,0xFCA0,0xFCC0,0xFCE0,
+ 0xFD00,0xFD20,0xFD40,0xFD60,0xFD80,0xFDA0,0xFDC0,0xFDE0,
+ 0x0200,0x0220,0x0240,0x0260,0x0280,0x02A0,0x02C0,0x02E0,
+ 0x0300,0x0320,0x0340,0x0360,0x0380,0x03A0,0x03C0,0x03E0,
+ 0xFE00,0xFE10,0xFE20,0xFE30,0xFE40,0xFE50,0xFE60,0xFE70,
+ 0xFE80,0xFE90,0xFEA0,0xFEB0,0xFEC0,0xFED0,0xFEE0,0xFEF0,
+ 0x0100,0x0110,0x0120,0x0130,0x0140,0x0150,0x0160,0x0170,
+ 0x0180,0x0190,0x01A0,0x01B0,0x01C0,0x01D0,0x01E0,0x01F0,
+ 0x0000,0x0008,0x0010,0x0018,0x0020,0x0028,0x0030,0x0038,
+ 0x0040,0x0048,0x0050,0x0058,0x0060,0x0068,0x0070,0x0078,
+ 0xFF80,0xFF88,0xFF90,0xFF98,0xFFA0,0xFFA8,0xFFB0,0xFFB8,
+ 0xFFC0,0xFFC8,0xFFD0,0xFFD8,0xFFE0,0xFFE8,0xFFF0,0xFFF8,
+};
+
+
+#define STATUS m_SOUNDREGS[0x404/4]
+#define CURSADDR(chan) (m_SOUNDREGS[(0x20/4)*chan+0x00])
+#define DSADDR(chan) ((m_SOUNDREGS[(0x20/4)*chan+0x08/4]>>0)&0xffff)
+#define LOOPBEGIN(chan) (m_SOUNDREGS[(0x20/4)*chan+0x0c/4]&0x3fffff)
+#define LOOPEND(chan) (m_SOUNDREGS[(0x20/4)*chan+0x10/4]&0x3fffff)
+#define ENVVOL(chan) (m_SOUNDREGS[(0x20/4)*chan+0x04/4]&0xffffff)
+
+/*
+#define GETSOUNDREG16(Chan,Offs) space.read_word(m_reg_base+0x20*Chan+Offs)
+#define GETSOUNDREG32(Chan,Offs) space.read_dword(m_reg_base+0x20*Chan+Offs)
+
+#define CURSADDR(chan) GETSOUNDREG32(chan,0x00)
+#define DSADDR(chan) GETSOUNDREG16(chan,0x08)
+#define LOOPBEGIN(chan) (GETSOUNDREG32(chan,0x0c)&0x3fffff)
+#define LOOPEND(chan) (GETSOUNDREG32(chan,0x10)&0x3fffff)
+#define ENVVOL(chan) (GETSOUNDREG32(chan,0x04)&0xffffff)
+*/
+
+
+
+//**************************************************************************
+// LIVE DEVICE
+//**************************************************************************
+
+const device_type VRENDER0 = &device_creator<vrender0_device>;
+
+//-------------------------------------------------
+// vrender0_device - constructor
+//-------------------------------------------------
+
+vrender0_device::vrender0_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
+ : device_t(mconfig, VRENDER0, "VRender0", tag, owner, clock, "vrender0", __FILE__),
+ device_sound_interface(mconfig, *this),
+ m_TexBase(NULL),
+ m_FBBase(NULL),
+ m_stream(NULL),
+ m_reg_base(0)
+{
+}
+
+
+//-------------------------------------------------
+// device_start - device-specific startup
+//-------------------------------------------------
+
+void vrender0_device::device_start()
+{
+ memset(m_SOUNDREGS,0,sizeof(m_SOUNDREGS));
+
+ m_stream = stream_alloc(0, 2, 44100);
+
+ save_item(NAME(m_SOUNDREGS));
+}
+
+
+//-------------------------------------------------
+// sound_stream_update - handle update requests
+// for our sound stream
+//-------------------------------------------------
+
+void vrender0_device::sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples)
+{
+ VR0_RenderAudio(samples, outputs[0], outputs[1]);
+}
+
+
+
+READ32_MEMBER(vrender0_device::vr0_snd_read)
+{
+ return m_SOUNDREGS[offset];
+}
+
+
+WRITE32_MEMBER(vrender0_device::vr0_snd_write)
+{
+ if(offset==0x404/4)
+ {
+ data&=0xffff;
+ if(data&0x8000)
+ {
+ UINT32 c=data&0x1f;
+ STATUS|=1<<c;
+ CURSADDR(c)=0;
+ }
+ else
+ {
+ STATUS&=~(1<<(data&0x1f));
+ }
+ return;
+ }
+ else
+ {
+ COMBINE_DATA(&m_SOUNDREGS[offset]);
+ }
+}
+
+
+void vrender0_device::set_areas(UINT32 *texture, UINT32 *frame)
+{
+ m_TexBase=texture;
+ m_FBBase=frame;
+}
+
+
+void vrender0_device::VR0_RenderAudio(int nsamples, stream_sample_t *l, stream_sample_t *r)
+{
+ INT16 *SAMPLES;
+ UINT32 st=STATUS;
+ signed int lsample=0,rsample=0;
+ UINT32 CLK=(m_SOUNDREGS[0x600/4]>>0)&0xff;
+ UINT32 NCH=(m_SOUNDREGS[0x600/4]>>8)&0xff;
+ UINT32 CT1=(m_SOUNDREGS[0x600/4]>>16)&0xff;
+ UINT32 CT2=(m_SOUNDREGS[0x600/4]>>24)&0xff;
+ int div;
+ int s;
+
+
+ if(CT1&0x20)
+ SAMPLES=(INT16 *)m_TexBase;
+ else
+ SAMPLES=(INT16 *)m_FBBase;
+
+ if(CLK)
+ div=((30<<16)|0x8000)/(CLK+1);
+ else
+ div=1<<16;
+
+ for(s=0;s<nsamples;++s)
+ {
+ int i;
+ lsample=rsample=0;
+ for(i=0;i<=NCH;++i)
+ {
+ signed int sample;
+ UINT32 cur=CURSADDR(i);
+ UINT32 a=LOOPBEGIN(i)+(cur>>10);
+ UINT8 Mode=m_SOUNDREGS[(0x20/4)*i+0x8/4]>>24;
+ signed int LVOL=m_SOUNDREGS[(0x20/4)*i+0xc/4]>>24;
+ signed int RVOL=m_SOUNDREGS[(0x20/4)*i+0x10/4]>>24;
+
+ INT32 DSADD=(DSADDR(i)*div)>>16;
+
+ if(!(st&(1<<i)) || !(CT2&0x80))
+ continue;
+
+ if(Mode&0x10) //u-law
+ {
+ UINT16 s=SAMPLES[a];
+ if((cur&0x200))
+ s>>=8;
+ sample=(signed short)ULawTo16[s&0xff];
+ }
+ else
+ {
+ if(Mode&0x20) //8bit
+ {
+ UINT16 s=SAMPLES[a];
+ if((cur&0x200))
+ s>>=8;
+ sample=(signed short) (((signed char) (s&0xff))<<8);
+ }
+ else //16bit
+ {
+ sample=SAMPLES[a];
+ }
+ }
+
+ CURSADDR(i)+=DSADD;
+ if(a>=LOOPEND(i))
+ {
+ if(Mode&1) //Loop
+ CURSADDR(i)=0;//LOOPBEGIN(i)<<10;
+ else
+ {
+ STATUS&=~(1<<(i&0x1f));
+ break;
+ }
+ }
+// UINT32 v=(ENVVOL(i))>>8;
+// sample=(sample*v)>>16;
+ lsample+=(sample*LVOL)>>8;
+ rsample+=(sample*RVOL)>>8;
+ }
+ if(lsample>32767)
+ lsample=32767;
+ if(lsample<-32768)
+ lsample=-32768;
+ l[s]=lsample;
+ if(rsample>32767)
+ rsample=32767;
+ if(rsample<-32768)
+ rsample=-32768;
+ r[s]=rsample;
+ }
+}