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More asc fixes.

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This commit is contained in:
Dan Sumorok 2013-06-15 16:21:26 -04:00
parent ce68f366cb
commit b7cfe89445
1 changed files with 65 additions and 56 deletions
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121
BasiliskII/src/uae_cpu/basilisk_glue.cpp
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@ -266,22 +266,20 @@ void Execute68k(uint32 addr, struct M68kRegisters *r)
}
#ifdef ENABLE_ASC_EMU
#include <asc.h>
static uae_u8 ASCRegs[0x2000] = {0};
static const int fifoCapacity = 2048;
static uint32 fifoInA = 0;
static uint32 fifoInB = 0;
static uint32 fifoWriteA = 0;
static uint32 fifoWriteB = 0;
static uint32 fifoOutA = 0;
static uint32 fifoOutB = 0;
static uae_u8 fifoA[fifoCapacity];
static uae_u8 fifoB[fifoCapacity];
static int underrun = 0;
static int clearFifo = 0;
static int32 ascBufferSize = -1;
static int soundRunning = 0;
static uae_u8 zeros[1024] = {0};
static uae_u8 lastMode = 0;
extern uae_u32 io_read(uaecptr addr, int width_bits) {
if((addr & 0x00ff000) == 0x0014000) {
@ -291,9 +289,9 @@ extern uae_u32 io_read(uaecptr addr, int width_bits) {
uae_u32 val;
if(offset < 0x400) {
/* Read of FIFO A. */
return 0;
} else if(offset < 0x800) {
/* Read of Fifo B */
return 0;
} else {
if(width_bits > 8) {
fprintf(stderr,
@ -317,6 +315,7 @@ extern uae_u32 io_read(uaecptr addr, int width_bits) {
}
val |= (val << 2);
return val;
default:
@ -327,7 +326,7 @@ extern uae_u32 io_read(uaecptr addr, int width_bits) {
}
return 0x00;
return 0;
}
extern void io_write(uaecptr addr, uae_u32 b, int width_bits) {
@ -361,33 +360,9 @@ extern void io_write(uaecptr addr, uae_u32 b, int width_bits) {
downsample -= 22257;
fifoA[(fifoInA++) % fifoCapacity] = b;
}
} else {
fifoA[(fifoInA++) % fifoCapacity] = b;
}
if(soundRunning == 0) {
depthA = fifoInA - fifoWriteA;
if(depthA >= 1024) {
if(ASCRegs[0x807] == 3) {
asc_init(44100);
} else {
asc_init(22050);
}
ascBufferSize = asc_get_buffer_size();
soundRunning = 1;
while( //((fifoWriteA - fifoOutA) < (ascBufferSize*2)) &&
((fifoInA - fifoWriteA) > ascBufferSize) ) {
asc_process_samples(&fifoA[fifoWriteA % fifoCapacity],
ascBufferSize);
fifoWriteA += ascBufferSize;
}
}
}
} else {
// Non fifo mode write
}
} else if(offset < 0x800) {
} else {
switch(offset) {
@ -395,22 +370,9 @@ extern void io_write(uaecptr addr, uae_u32 b, int width_bits) {
// MODE
// 1 = FIFO mode, 2 = wavetable mode
ASCRegs[0x801] = b & 0x03;
if(b == 0) {
break;
}
if(ASCRegs[0x801] != lastMode) {
asc_stop();
soundRunning = 0;
fifoWriteA = fifoInA;
}
lastMode = ASCRegs[0x801];
break;
case 0x802:
if(ASCRegs[0x802] == b) {
break;
}
// CONTROL
// bit 0: analog or PWM output
// bit 1: stereo/mono
@ -420,9 +382,10 @@ extern void io_write(uaecptr addr, uae_u32 b, int width_bits) {
case 0x803:
// FIFO Mode
if(b & 0x80) {
if((b & 0x80) && (underrun == 0)) {
if(fifoInA > (fifoWriteA + ascBufferSize)) {
fifoInA = fifoWriteA + ascBufferSize;
fifoInA = 0;
clearFifo = 1;
}
}
break;
@ -441,7 +404,52 @@ extern void io_write(uaecptr addr, uae_u32 b, int width_bits) {
case 0x807:
// Clock rate 0 = 22257, 2 = 22050, 3 = 44100
downsample = 0;
{
int newRate, oldRate;
if(ASCRegs[0x807] == 3) {
oldRate = 44100;
} else {
oldRate = 22050;
}
if(b == 3) {
newRate = 44100;
} else {
newRate = 22050;
}
if(newRate != oldRate) {
asc_stop();
soundRunning = 0;
}
if(soundRunning == 0) {
int32 depthA = fifoInA - fifoWriteA;
soundRunning = 1;
downsample = 0;
if(zeros[0] == 0) {
memset(zeros, 128, sizeof(zeros));
}
asc_init(newRate);
ascBufferSize = asc_get_buffer_size();
if(depthA >= ascBufferSize) {
asc_process_samples(&fifoA[fifoWriteA % fifoCapacity],
ascBufferSize);
fifoWriteA += ascBufferSize;
underrun = 0;
} else {
underrun = 1;
asc_process_samples(zeros, ascBufferSize);
}
}
}
ASCRegs[0x807] = b;
break;
@ -458,22 +466,23 @@ extern void io_write(uaecptr addr, uae_u32 b, int width_bits) {
}
void asc_callback() {
if(zeros[0] == 0) {
memset(zeros, 128, sizeof(zeros));
}
if(soundRunning == 0) {
asc_process_samples(zeros, ascBufferSize);
return;
}
fifoOutA += ascBufferSize;
if(clearFifo) {
fifoWriteA = 0;
clearFifo = 0;
}
if( ((fifoInA - fifoWriteA) >= ascBufferSize) &&
(ASCRegs[0x801] == 1)) {
if((fifoInA > fifoWriteA) &&
((fifoInA - fifoWriteA) >= ascBufferSize)) {
asc_process_samples(&fifoA[fifoWriteA % fifoCapacity], ascBufferSize);
fifoWriteA += ascBufferSize;
underrun = 0;
} else {
static int ucount = 0;
underrun = 1;
asc_process_samples(zeros, ascBufferSize);
}
}