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77 lines
1.6 KiB
Plaintext
77 lines
1.6 KiB
Plaintext
//
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// Atari2600.m
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// CLK
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//
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// Created by Thomas Harte on 14/07/2015.
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// Copyright © 2015 Thomas Harte. All rights reserved.
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//
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#import "CSAtari2600.h"
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#import "Atari2600.hpp"
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@interface CSAtari2600 (Callbacks)
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- (void)crtDidEndFrame:(CRTFrame *)frame didDetectVSync:(BOOL)didDetectVSync;
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@end
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struct Atari2600CRTDelegate: public Outputs::CRT::CRTDelegate {
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__weak CSAtari2600 *atari;
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void crt_did_end_frame(Outputs::CRT *crt, CRTFrame *frame, bool did_detect_vsync) { [atari crtDidEndFrame:frame didDetectVSync:did_detect_vsync]; }
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};
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@implementation CSAtari2600 {
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Atari2600::Machine _atari2600;
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Atari2600CRTDelegate _crtDelegate;
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dispatch_queue_t _serialDispatchQueue;
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int _failedVSyncCount;
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}
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- (void)crtDidEndFrame:(CRTFrame *)frame didDetectVSync:(BOOL)didDetectVSync {
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if(!didDetectVSync)
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{
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_failedVSyncCount+=2;
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if(_failedVSyncCount == 60)
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{
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_atari2600.switch_region();
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}
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}
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else
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{
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_failedVSyncCount = MAX(_failedVSyncCount - 1, 0);
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}
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BOOL hasReturn = [self.view pushFrame:frame];
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if(hasReturn)
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_atari2600.get_crt()->return_frame();
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}
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- (void)runForNumberOfCycles:(int)cycles {
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dispatch_async(_serialDispatchQueue, ^{
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_atari2600.run_for_cycles(cycles);
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});
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}
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- (void)setROM:(NSData *)rom {
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dispatch_async(_serialDispatchQueue, ^{
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_atari2600.set_rom(rom.length, (const uint8_t *)rom.bytes);
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});
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}
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- (instancetype)init {
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self = [super init];
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if (self) {
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_crtDelegate.atari = self;
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_atari2600.get_crt()->set_delegate(&_crtDelegate);
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_serialDispatchQueue = dispatch_queue_create("Atari 2600 queue", DISPATCH_QUEUE_SERIAL);
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}
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return self;
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}
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@end
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