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Added asc.c, and asc.h.

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Don't stop sound if we don't have to.
This commit is contained in:
Dan Sumorok 2013-06-09 19:34:19 -04:00
parent eedf6880db
commit ce68f366cb
3 changed files with 85 additions and 15 deletions
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51
BasiliskII/src/MacOSX/asc.cpp Normal file
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@ -0,0 +1,51 @@
#include <stdio.h>
#include <asc.h>
#include "MacOSX_sound_if.h"
static OSXsoundOutput *soundOutput = NULL;
static int audioInt(void);
bool asc_init(int32 sample_rate) {
if(soundOutput != NULL) {
delete soundOutput;
soundOutput = NULL;
}
soundOutput = new OSXsoundOutput();
soundOutput->start(8, 1, sample_rate);
soundOutput->setCallback(audioInt);
return true;
}
bool asc_process_samples(const uae_u8 *samples, int count) {
if(soundOutput == NULL) {
return false;
}
if(soundOutput->sendAudioBuffer((const void *)samples, count) != 0) {
return false;
}
return true;
}
static int audioInt(void) {
asc_callback();
return 0;
}
int32 asc_get_buffer_size() {
if(soundOutput == NULL) {
return -1;
}
return (int32) soundOutput->bufferSizeFrames();
}
void asc_stop() {
delete soundOutput;
soundOutput = NULL;
}

13
BasiliskII/src/include/asc.h Normal file
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@ -0,0 +1,13 @@
#ifndef ASC_H
#define ASC_H
#include "sysdeps.h"
#include "cpu_emulation.h"
bool asc_init(int32 sample_rate);
bool asc_process_samples(const uae_u8 *samples, int count);
int32 asc_get_buffer_size();
void asc_callback();
void asc_stop();
#endif

30
BasiliskII/src/uae_cpu/basilisk_glue.cpp
View File

@ -280,8 +280,8 @@ static uae_u8 fifoA[fifoCapacity];
static uae_u8 fifoB[fifoCapacity];
static int32 ascBufferSize = -1;
static int soundRunning = 0;
static int soundStop = 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) {
@ -334,12 +334,6 @@ extern void io_write(uaecptr addr, uae_u32 b, int width_bits) {
static int downsample = 0;
if((addr & 0x00ff000) == 0x0014000) {
if(soundStop) {
asc_stop();
soundRunning = 0;
soundStop = 0;
}
// Apple Sound Chip
if(width_bits > 8) {
fprintf(stderr,
@ -383,7 +377,7 @@ extern void io_write(uaecptr addr, uae_u32 b, int width_bits) {
ascBufferSize = asc_get_buffer_size();
soundRunning = 1;
while(((fifoWriteA - fifoOutA) < (ascBufferSize*2)) &&
while( //((fifoWriteA - fifoOutA) < (ascBufferSize*2)) &&
((fifoInA - fifoWriteA) > ascBufferSize) ) {
asc_process_samples(&fifoA[fifoWriteA % fifoCapacity],
ascBufferSize);
@ -401,11 +395,22 @@ 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
@ -416,9 +421,9 @@ extern void io_write(uaecptr addr, uae_u32 b, int width_bits) {
case 0x803:
// FIFO Mode
if(b & 0x80) {
downsample = 0;
asc_stop();
soundRunning = 0;
if(fifoInA > (fifoWriteA + ascBufferSize)) {
fifoInA = fifoWriteA + ascBufferSize;
}
}
break;
@ -463,7 +468,8 @@ void asc_callback() {
fifoOutA += ascBufferSize;
if((fifoInA - fifoWriteA) >= ascBufferSize) {
if( ((fifoInA - fifoWriteA) >= ascBufferSize) &&
(ASCRegs[0x801] == 1)) {
asc_process_samples(&fifoA[fifoWriteA % fifoCapacity], ascBufferSize);
fifoWriteA += ascBufferSize;
} else {