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Added rewinding support to the core and the Cocoa frontend

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This commit is contained in:
Lior Halphon 2018-02-10 14:42:14 +02:00
parent 51eacd3174
commit 1c61b006ba
14 changed files with 384 additions and 46 deletions
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4
Cocoa/AppDelegate.m
View File

@ -28,10 +28,12 @@
@"GBStart": @(kVK_Return),
@"GBTurbo": @(kVK_Space),
@"GBRewind": @(kVK_Tab),
@"GBFilter": @"NearestNeighbor",
@"GBColorCorrection": @(GB_COLOR_CORRECTION_EMULATE_HARDWARE),
@"GBHighpassFilter": @(GB_HIGHPASS_REMOVE_DC_OFFSET)
@"GBHighpassFilter": @(GB_HIGHPASS_REMOVE_DC_OFFSET),
@"GBRewindLength": @(10)
}];
}

29
Cocoa/Document.m
View File

@ -51,6 +51,8 @@ enum model {
bool logToSideView;
bool shouldClearSideView;
enum model current_model;
bool rewind;
}
@property GBAudioClient *audioClient;
@ -166,6 +168,7 @@ static void printImage(GB_gameboy_t *gb, uint32_t *image, uint8_t height,
GB_set_camera_get_pixel_callback(&gb, cameraGetPixel);
GB_set_camera_update_request_callback(&gb, cameraRequestUpdate);
GB_set_highpass_filter_mode(&gb, (GB_highpass_mode_t) [[NSUserDefaults standardUserDefaults] integerForKey:@"GBHighpassFilter"]);
GB_set_rewind_length(&gb, [[NSUserDefaults standardUserDefaults] integerForKey:@"GBRewindLength"]);
[self loadROM];
}
@ -179,6 +182,9 @@ static void printImage(GB_gameboy_t *gb, uint32_t *image, uint8_t height,
[self reloadVRAMData: nil];
});
}
if (self.view.isRewinding) {
rewind = true;
}
}
- (void) run
@ -197,7 +203,16 @@ static void printImage(GB_gameboy_t *gb, uint32_t *image, uint8_t height,
NSTimer *hex_timer = [NSTimer timerWithTimeInterval:0.25 target:self selector:@selector(reloadMemoryView) userInfo:nil repeats:YES];
[[NSRunLoop mainRunLoop] addTimer:hex_timer forMode:NSDefaultRunLoopMode];
while (running) {
GB_run(&gb);
if (rewind) {
rewind = false;
GB_rewind_pop(&gb);
if (!GB_rewind_pop(&gb)) {
rewind = self.view.isRewinding;
}
}
else {
GB_run(&gb);
}
}
[hex_timer invalidate];
[self.audioClient stop];
@ -327,6 +342,11 @@ static void printImage(GB_gameboy_t *gb, uint32_t *image, uint8_t height,
name:@"GBColorCorrectionChanged"
object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(updateRewindLength)
name:@"GBRewindLengthChanged"
object:nil];
if ([[NSUserDefaults standardUserDefaults] boolForKey:@"EmulateDMG"]) {
[self initDMG];
}
@ -1324,4 +1344,11 @@ static void printImage(GB_gameboy_t *gb, uint32_t *image, uint8_t height,
}
}
- (void) updateRewindLength
{
if (GB_is_inited(&gb)) {
GB_set_rewind_length(&gb, [[NSUserDefaults standardUserDefaults] integerForKey:@"GBRewindLength"]);
}
}
@end

1
Cocoa/GBButtons.h
View File

@ -11,6 +11,7 @@ typedef enum : NSUInteger {
GBSelect,
GBStart,
GBTurbo,
GBRewind,
GBButtonCount
} GBButton;

2
Cocoa/GBButtons.m
View File

@ -1,4 +1,4 @@
#import <Foundation/Foundation.h>
#import "GBButtons.h"
NSString const *GBButtonNames[] = {@"Right", @"Left", @"Up", @"Down", @"A", @"B", @"Select", @"Start", @"Turbo"};
NSString const *GBButtonNames[] = {@"Right", @"Left", @"Up", @"Down", @"A", @"B", @"Select", @"Start", @"Turbo", @"Rewind"};

1
Cocoa/GBPreferencesWindow.h
View File

@ -7,6 +7,7 @@
@property (strong) IBOutlet NSButton *aspectRatioCheckbox;
@property (strong) IBOutlet NSPopUpButton *highpassFilterPopupButton;
@property (strong) IBOutlet NSPopUpButton *colorCorrectionPopupButton;
@property (strong) IBOutlet NSPopUpButton *rewindPopupButton;
@property (strong) IBOutlet NSButton *configureJoypadButton;
@property (strong) IBOutlet NSButton *skipButton;
@end

20
Cocoa/GBPreferencesWindow.m
View File

@ -14,6 +14,7 @@
NSPopUpButton *_graphicsFilterPopupButton;
NSPopUpButton *_highpassFilterPopupButton;
NSPopUpButton *_colorCorrectionPopupButton;
NSPopUpButton *_rewindPopupButton;
NSButton *_aspectRatioCheckbox;
}
@ -77,6 +78,18 @@
return _colorCorrectionPopupButton;
}
- (void)setRewindPopupButton:(NSPopUpButton *)rewindPopupButton
{
_rewindPopupButton = rewindPopupButton;
NSInteger length = [[NSUserDefaults standardUserDefaults] integerForKey:@"GBRewindLength"];
[_rewindPopupButton selectItemWithTag:length];
}
- (NSPopUpButton *)rewindPopupButton
{
return _rewindPopupButton;
}
- (void)setHighpassFilterPopupButton:(NSPopUpButton *)highpassFilterPopupButton
{
_highpassFilterPopupButton = highpassFilterPopupButton;
@ -161,6 +174,13 @@
}
- (IBAction)rewindLengthChanged:(id)sender
{
[[NSUserDefaults standardUserDefaults] setObject:@([sender selectedTag])
forKey:@"GBRewindLength"];
[[NSNotificationCenter defaultCenter] postNotificationName:@"GBRewindLengthChanged" object:nil];
}
- (IBAction) configureJoypad:(id)sender
{
[self.configureJoypadButton setEnabled:NO];

1
Cocoa/GBView.h
View File

@ -10,4 +10,5 @@
@property (nonatomic) BOOL shouldBlendFrameWithPrevious;
@property GBShader *shader;
@property (getter=isMouseHidingEnabled) BOOL mouseHidingEnabled;
@property bool isRewinding;
@end

20
Cocoa/GBView.m
View File

@ -173,7 +173,12 @@
handled = true;
switch (i) {
case GBTurbo:
GB_set_turbo_mode(_gb, true, false);
GB_set_turbo_mode(_gb, true, self.isRewinding);
break;
case GBRewind:
self.isRewinding = true;
GB_set_turbo_mode(_gb, false, false);
break;
default:
@ -201,6 +206,10 @@
case GBTurbo:
GB_set_turbo_mode(_gb, false, false);
break;
case GBRewind:
self.isRewinding = false;
break;
default:
GB_set_key_state(_gb, (GB_key_t)i, false);
@ -224,7 +233,14 @@
if (mapped_button && [mapped_button integerValue] == button) {
switch (i) {
case GBTurbo:
GB_set_turbo_mode(_gb, state, false);
GB_set_turbo_mode(_gb, state, state && self.isRewinding);
break;
case GBRewind:
self.isRewinding = state;
if (state) {
GB_set_turbo_mode(_gb, false, false);
}
break;
default:

110
Cocoa/Preferences.xib
View File

@ -1,8 +1,8 @@
<?xml version="1.0" encoding="UTF-8"?>
<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="13529" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES" customObjectInstantitationMethod="direct">
<document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="13771" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES" customObjectInstantitationMethod="direct">
<dependencies>
<deployment identifier="macosx"/>
<plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="13529"/>
<plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="13771"/>
<capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
</dependencies>
<objects>
@ -17,14 +17,14 @@
<windowStyleMask key="styleMask" titled="YES" closable="YES"/>
<windowCollectionBehavior key="collectionBehavior" fullScreenAuxiliary="YES"/>
<windowPositionMask key="initialPositionMask" leftStrut="YES" rightStrut="YES" topStrut="YES" bottomStrut="YES"/>
<rect key="contentRect" x="196" y="240" width="292" height="459"/>
<rect key="contentRect" x="196" y="240" width="292" height="516"/>
<rect key="screenRect" x="0.0" y="0.0" width="2560" height="1417"/>
<view key="contentView" id="EiT-Mj-1SZ">
<rect key="frame" x="0.0" y="0.0" width="292" height="459"/>
<rect key="frame" x="0.0" y="0.0" width="292" height="516"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<subviews>
<textField horizontalHuggingPriority="251" verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="T91-rh-rRp">
<rect key="frame" x="18" y="422" width="256" height="17"/>
<rect key="frame" x="18" y="487" width="256" height="17"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
<textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" sendsActionOnEndEditing="YES" title="Graphics Filter:" id="pXg-WY-8Q5">
<font key="font" metaFont="system"/>
@ -33,7 +33,7 @@
</textFieldCell>
</textField>
<popUpButton verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="6pP-kK-EEC">
<rect key="frame" x="30" y="390" width="245" height="26"/>
<rect key="frame" x="30" y="455" width="245" height="26"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
<popUpButtonCell key="cell" type="push" bezelStyle="rounded" alignment="left" lineBreakMode="truncatingTail" borderStyle="borderAndBezel" imageScaling="proportionallyDown" inset="2" id="I1w-05-lGl">
<behavior key="behavior" lightByBackground="YES" lightByGray="YES"/>
@ -67,7 +67,7 @@
</connections>
</popUpButton>
<textField horizontalHuggingPriority="251" verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="Wc3-2K-6CD">
<rect key="frame" x="18" y="368" width="256" height="17"/>
<rect key="frame" x="18" y="433" width="256" height="17"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
<textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" sendsActionOnEndEditing="YES" title="Color Correction:" id="5Si-hz-EK3">
<font key="font" metaFont="system"/>
@ -76,7 +76,7 @@
</textFieldCell>
</textField>
<popUpButton verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="VEz-N4-uP6">
<rect key="frame" x="30" y="336" width="245" height="26"/>
<rect key="frame" x="30" y="401" width="245" height="26"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
<popUpButtonCell key="cell" type="push" title="Disabled" bezelStyle="rounded" alignment="left" lineBreakMode="truncatingTail" state="on" borderStyle="borderAndBezel" imageScaling="proportionallyDown" inset="2" selectedItem="D2J-wV-1vu" id="fNJ-Fi-yOm">
<behavior key="behavior" lightByBackground="YES" lightByGray="YES"/>
@ -97,7 +97,7 @@
</connections>
</popUpButton>
<popUpButton verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="T69-6N-dhT">
<rect key="frame" x="30" y="256" width="245" height="26"/>
<rect key="frame" x="30" y="321" width="245" height="26"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
<popUpButtonCell key="cell" type="push" title="Disabled (Keep DC Offset)" bezelStyle="rounded" alignment="left" lineBreakMode="truncatingTail" state="on" borderStyle="borderAndBezel" imageScaling="proportionallyDown" inset="2" selectedItem="Fgo-0S-zUG" id="om2-Bn-43B">
<behavior key="behavior" lightByBackground="YES" lightByGray="YES"/>
@ -116,8 +116,32 @@
<action selector="highpassFilterChanged:" target="QvC-M9-y7g" id="CYt-0v-sw0"/>
</connections>
</popUpButton>
<popUpButton verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="7fg-Ww-JjR">
<rect key="frame" x="30" y="267" width="245" height="26"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
<popUpButtonCell key="cell" type="push" title="Disabled" bezelStyle="rounded" alignment="left" lineBreakMode="truncatingTail" borderStyle="borderAndBezel" imageScaling="proportionallyDown" inset="2" selectedItem="lxQ-4n-kEv" id="lvb-QF-0Ht">
<behavior key="behavior" lightByBackground="YES" lightByGray="YES"/>
<font key="font" metaFont="menu"/>
<menu key="menu" id="lbS-Lw-kQX">
<items>
<menuItem title="Disabled" id="lxQ-4n-kEv">
<modifierMask key="keyEquivalentModifierMask"/>
</menuItem>
<menuItem title="10 Seconds" state="on" tag="10" id="bPU-vT-d5z"/>
<menuItem title="30 Seconds" tag="30" id="aR8-IU-fFh"/>
<menuItem title="1 Minute" tag="60" id="E0R-mf-Hdl"/>
<menuItem title="2 Minutes" tag="120" id="zb2-uh-lvj"/>
<menuItem title="5 Minutes" tag="300" id="6Jj-EI-f6k"/>
<menuItem title="10 Minutes" tag="600" id="DOL-qL-Caz"/>
</items>
</menu>
</popUpButtonCell>
<connections>
<action selector="rewindLengthChanged:" target="QvC-M9-y7g" id="5NQ-1T-RNc"/>
</connections>
</popUpButton>
<button fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="Vfj-tg-7OP">
<rect key="frame" x="18" y="311" width="256" height="18"/>
<rect key="frame" x="18" y="376" width="256" height="18"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
<buttonCell key="cell" type="check" title="Keep Aspect Ratio" bezelStyle="regularSquare" imagePosition="left" state="on" inset="2" id="lsj-rC-Eo6">
<behavior key="behavior" changeContents="YES" doesNotDimImage="YES" lightByContents="YES"/>
@ -128,7 +152,7 @@
</connections>
</button>
<textField horizontalHuggingPriority="251" verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="Utu-t4-cLx">
<rect key="frame" x="18" y="234" width="256" height="17"/>
<rect key="frame" x="18" y="245" width="256" height="17"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
<textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" sendsActionOnEndEditing="YES" title="Button configuration:" id="YqW-Ds-VIC">
<font key="font" metaFont="system"/>
@ -137,7 +161,7 @@
</textFieldCell>
</textField>
<textField horizontalHuggingPriority="251" verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="WU3-oV-KHO">
<rect key="frame" x="18" y="288" width="256" height="17"/>
<rect key="frame" x="18" y="353" width="256" height="17"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
<textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" sendsActionOnEndEditing="YES" title="High-pass Filter:" id="YLF-RL-b2D">
<font key="font" metaFont="system"/>
@ -145,15 +169,46 @@
<color key="backgroundColor" name="controlColor" catalog="System" colorSpace="catalog"/>
</textFieldCell>
</textField>
<textField horizontalHuggingPriority="251" verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="w9w-yX-KxB">
<rect key="frame" x="18" y="299" width="256" height="17"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
<textFieldCell key="cell" scrollable="YES" lineBreakMode="clipping" sendsActionOnEndEditing="YES" title="Rewinding Duration:" id="JaO-5h-ugl">
<font key="font" metaFont="system"/>
<color key="textColor" name="labelColor" catalog="System" colorSpace="catalog"/>
<color key="backgroundColor" name="controlColor" catalog="System" colorSpace="catalog"/>
</textFieldCell>
</textField>
<button verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="d2I-jU-sLb">
<rect key="frame" x="211" y="8" width="67" height="32"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
<buttonCell key="cell" type="push" title="Skip" bezelStyle="rounded" alignment="center" enabled="NO" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="sug-xy-tbw">
<behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
<font key="font" metaFont="system"/>
</buttonCell>
<connections>
<action selector="skipButton:" target="QvC-M9-y7g" id="aw8-sw-yJw"/>
</connections>
</button>
<button verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="Qa7-Z7-yfO">
<rect key="frame" x="26" y="8" width="188" height="32"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
<buttonCell key="cell" type="push" title="Configure Joypad" bezelStyle="rounded" alignment="center" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="GdK-tQ-Wim">
<behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
<font key="font" metaFont="system"/>
</buttonCell>
<connections>
<action selector="configureJoypad:" target="QvC-M9-y7g" id="IfY-Kc-PKU"/>
</connections>
</button>
<scrollView focusRingType="none" fixedFrame="YES" autohidesScrollers="YES" horizontalLineScroll="19" horizontalPageScroll="10" verticalLineScroll="19" verticalPageScroll="10" hasHorizontalScroller="NO" hasVerticalScroller="NO" usesPredominantAxisScrolling="NO" horizontalScrollElasticity="none" verticalScrollElasticity="none" translatesAutoresizingMaskIntoConstraints="NO" id="PBp-dj-EIa">
<rect key="frame" x="20" y="53" width="252" height="173"/>
<rect key="frame" x="26" y="45" width="252" height="192"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
<clipView key="contentView" focusRingType="none" ambiguous="YES" drawsBackground="NO" id="AMs-PO-nid">
<rect key="frame" x="1" y="1" width="250" height="171"/>
<rect key="frame" x="1" y="1" width="250" height="190"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<subviews>
<tableView focusRingType="none" appearanceType="vibrantLight" verticalHuggingPriority="750" allowsExpansionToolTips="YES" columnAutoresizingStyle="lastColumnOnly" columnReordering="NO" columnResizing="NO" multipleSelection="NO" emptySelection="NO" autosaveColumns="NO" typeSelect="NO" id="UDd-IJ-fxX">
<rect key="frame" x="0.0" y="0.0" width="250" height="171"/>
<rect key="frame" x="0.0" y="0.0" width="250" height="190"/>
<autoresizingMask key="autoresizingMask"/>
<size key="intercellSpacing" width="3" height="2"/>
<color key="backgroundColor" name="controlBackgroundColor" catalog="System" colorSpace="catalog"/>
@ -203,28 +258,6 @@
<autoresizingMask key="autoresizingMask"/>
</scroller>
</scrollView>
<button verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="d2I-jU-sLb">
<rect key="frame" x="205" y="10" width="67" height="32"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
<buttonCell key="cell" type="push" title="Skip" bezelStyle="rounded" alignment="center" enabled="NO" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="sug-xy-tbw">
<behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
<font key="font" metaFont="system"/>
</buttonCell>
<connections>
<action selector="skipButton:" target="QvC-M9-y7g" id="aw8-sw-yJw"/>
</connections>
</button>
<button verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="Qa7-Z7-yfO">
<rect key="frame" x="20" y="10" width="188" height="32"/>
<autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
<buttonCell key="cell" type="push" title="Configure Joypad" bezelStyle="rounded" alignment="center" borderStyle="border" imageScaling="proportionallyDown" inset="2" id="GdK-tQ-Wim">
<behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
<font key="font" metaFont="system"/>
</buttonCell>
<connections>
<action selector="configureJoypad:" target="QvC-M9-y7g" id="IfY-Kc-PKU"/>
</connections>
</button>
</subviews>
</view>
<connections>
@ -235,9 +268,10 @@
<outlet property="delegate" destination="-2" id="ASc-vN-Zbq"/>
<outlet property="graphicsFilterPopupButton" destination="6pP-kK-EEC" id="LS7-HY-kHC"/>
<outlet property="highpassFilterPopupButton" destination="T69-6N-dhT" id="0p6-4m-hb1"/>
<outlet property="rewindPopupButton" destination="7fg-Ww-JjR" id="Ka2-TP-B1x"/>
<outlet property="skipButton" destination="d2I-jU-sLb" id="udX-8K-0sK"/>
</connections>
<point key="canvasLocation" x="179" y="498"/>
<point key="canvasLocation" x="183" y="510"/>
</window>
</objects>
</document>

4
Core/display.c
View File

@ -198,6 +198,8 @@ static uint32_t get_pixel(GB_gameboy_t *gb, uint8_t x, uint8_t y)
static void display_vblank(GB_gameboy_t *gb)
{
gb->vblank_just_occured = true;
if (gb->turbo) {
if (GB_timing_sync_turbo(gb)) {
return;
@ -216,8 +218,6 @@ static void display_vblank(GB_gameboy_t *gb)
gb->vblank_callback(gb);
GB_timing_sync(gb);
gb->vblank_just_occured = true;
}
static inline uint8_t scale_channel(uint8_t x)

7
Core/gb.c
View File

@ -11,6 +11,10 @@
#endif
#include "gb.h"
/* The libretro frontend does not link against rewind.c, so we provide empty weak alternatives to its functions */
void __attribute__((weak)) GB_rewind_free(GB_gameboy_t *gb) { }
void __attribute__((weak)) GB_rewind_push(GB_gameboy_t *gb) { }
void GB_attributed_logv(GB_gameboy_t *gb, GB_log_attributes attributes, const char *fmt, va_list args)
{
char *string = NULL;
@ -149,6 +153,7 @@ void GB_free(GB_gameboy_t *gb)
gb->reversed_symbol_map.buckets[i] = next;
}
}
GB_rewind_free(gb);
memset(gb, 0, sizeof(*gb));
}
@ -280,6 +285,7 @@ uint8_t GB_run(GB_gameboy_t *gb)
GB_update_joyp(gb);
GB_rtc_run(gb);
GB_debugger_handle_async_commands(gb);
GB_rewind_push(gb);
}
return gb->cycles_since_run;
}
@ -505,6 +511,7 @@ void GB_switch_model_and_reset(GB_gameboy_t *gb, bool is_cgb)
gb->vram = realloc(gb->vram, gb->vram_size = 0x2000);
}
gb->is_cgb = is_cgb;
GB_rewind_free(gb);
GB_reset(gb);
}

13
Core/gb.h
View File

@ -17,6 +17,7 @@
#include "memory.h"
#include "printer.h"
#include "timing.h"
#include "rewind.h"
#include "z80_cpu.h"
#include "symbol_hash.h"
@ -161,7 +162,7 @@ typedef enum {
#define CPU_FREQUENCY 0x400000
#define DIV_CYCLES (0x100)
#define INTERNAL_DIV_CYCLES (0x40000)
#define FRAME_LENGTH 16742706 // in nanoseconds
#define FRAME_LENGTH (1000000000LL * LCDC_PERIOD / CPU_FREQUENCY) // in nanoseconds
#if !defined(MIN)
#define MIN(A,B) ({ __typeof__(A) __a = (A); __typeof__(B) __b = (B); __a < __b ? __a : __b; })
@ -475,6 +476,16 @@ struct GB_gameboy_internal_s {
/* Ticks command */
unsigned long debugger_ticks;
/* Rewind */
#define GB_REWIND_FRAMES_PER_KEY 255
size_t rewind_buffer_length;
struct {
uint8_t *key_state;
uint8_t *compressed_states[GB_REWIND_FRAMES_PER_KEY];
unsigned pos;
} *rewind_sequences; // lasts about 4 seconds
size_t rewind_pos;
/* Misc */
bool turbo;

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Core/rewind.c Normal file
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#include "rewind.h"
#include <math.h>
static uint8_t *state_compress(const uint8_t *prev, const uint8_t *data, size_t uncompressed_size)
{
size_t malloc_size = 0x1000;
uint8_t *compressed = malloc(malloc_size);
size_t counter_pos = 0;
size_t data_pos = sizeof(uint16_t);
bool prev_mode = true;
*(uint16_t *)compressed = 0;
#define COUNTER (*(uint16_t *)&compressed[counter_pos])
#define DATA (compressed[data_pos])
while (uncompressed_size) {
if (prev_mode) {
if (*data == *prev && COUNTER != 0xffff) {
COUNTER++;
data++;
prev++;
uncompressed_size--;
}
else {
prev_mode = false;
counter_pos += sizeof(uint16_t);
data_pos = counter_pos + sizeof(uint16_t);
if (data_pos >= malloc_size) {
malloc_size *= 2;
compressed = realloc(compressed, malloc_size);
}
COUNTER = 0;
}
}
else {
if (*data != *prev && COUNTER != 0xffff) {
COUNTER++;
DATA = *data;
data_pos++;
data++;
prev++;
uncompressed_size--;
if (data_pos >= malloc_size) {
malloc_size *= 2;
compressed = realloc(compressed, malloc_size);
}
}
else {
prev_mode = true;
counter_pos = data_pos;
data_pos = counter_pos + sizeof(uint16_t);
if (counter_pos >= malloc_size - 1) {
malloc_size *= 2;
compressed = realloc(compressed, malloc_size);
}
COUNTER = 0;
}
}
}
return realloc(compressed, data_pos);
#undef DATA
#undef COUNTER
}
static void state_decompress(const uint8_t *prev, uint8_t *data, uint8_t *dest, size_t uncompressed_size)
{
size_t counter_pos = 0;
size_t data_pos = sizeof(uint16_t);
bool prev_mode = true;
#define COUNTER (*(uint16_t *)&data[counter_pos])
#define DATA (data[data_pos])
while (uncompressed_size) {
if (prev_mode) {
if (COUNTER) {
COUNTER--;
*(dest++) = *(prev++);
uncompressed_size--;
}
else {
prev_mode = false;
counter_pos += sizeof(uint16_t);
data_pos = counter_pos + sizeof(uint16_t);
}
}
else {
if (COUNTER) {
COUNTER--;
*(dest++) = DATA;
data_pos++;
prev++;
uncompressed_size--;
}
else {
prev_mode = true;
counter_pos = data_pos;
data_pos += sizeof(uint16_t);
}
}
}
#undef DATA
#undef COUNTER
}
void GB_rewind_push(GB_gameboy_t *gb)
{
const size_t save_size = GB_get_save_state_size(gb);
if (!gb->rewind_sequences) {
if (gb->rewind_buffer_length) {
gb->rewind_sequences = malloc(sizeof(*gb->rewind_sequences) * gb->rewind_buffer_length);
memset(gb->rewind_sequences, 0, sizeof(*gb->rewind_sequences) * gb->rewind_buffer_length);
gb->rewind_pos = 0;
}
else {
return;
}
}
if (gb->rewind_sequences[gb->rewind_pos].pos == GB_REWIND_FRAMES_PER_KEY) {
gb->rewind_pos++;
if (gb->rewind_pos == gb->rewind_buffer_length) {
gb->rewind_pos = 0;
}
if (gb->rewind_sequences[gb->rewind_pos].key_state) {
free(gb->rewind_sequences[gb->rewind_pos].key_state);
gb->rewind_sequences[gb->rewind_pos].key_state = NULL;
}
for (unsigned i = 0; i < GB_REWIND_FRAMES_PER_KEY; i++) {
if (gb->rewind_sequences[gb->rewind_pos].compressed_states[i]) {
free(gb->rewind_sequences[gb->rewind_pos].compressed_states[i]);
gb->rewind_sequences[gb->rewind_pos].compressed_states[i] = 0;
}
}
gb->rewind_sequences[gb->rewind_pos].pos = 0;
}
if (!gb->rewind_sequences[gb->rewind_pos].key_state) {
gb->rewind_sequences[gb->rewind_pos].key_state = malloc(save_size);
GB_save_state_to_buffer(gb, gb->rewind_sequences[gb->rewind_pos].key_state);
}
else {
uint8_t *save_state = malloc(save_size);
GB_save_state_to_buffer(gb, save_state);
gb->rewind_sequences[gb->rewind_pos].compressed_states[gb->rewind_sequences[gb->rewind_pos].pos++] =
state_compress(gb->rewind_sequences[gb->rewind_pos].key_state, save_state, save_size);
free(save_state);
}
}
bool GB_rewind_pop(GB_gameboy_t *gb)
{
if (!gb->rewind_sequences || !gb->rewind_sequences[gb->rewind_pos].key_state) {
return false;
}
const size_t save_size = GB_get_save_state_size(gb);
if (gb->rewind_sequences[gb->rewind_pos].pos == 0) {
GB_load_state_from_buffer(gb, gb->rewind_sequences[gb->rewind_pos].key_state, save_size);
free(gb->rewind_sequences[gb->rewind_pos].key_state);
gb->rewind_sequences[gb->rewind_pos].key_state = NULL;
gb->rewind_pos = gb->rewind_pos == 0? gb->rewind_buffer_length - 1 : gb->rewind_pos - 1;
return true;
}
uint8_t *save_state = malloc(save_size);
state_decompress(gb->rewind_sequences[gb->rewind_pos].key_state,
gb->rewind_sequences[gb->rewind_pos].compressed_states[--gb->rewind_sequences[gb->rewind_pos].pos],
save_state,
save_size);
free(gb->rewind_sequences[gb->rewind_pos].compressed_states[gb->rewind_sequences[gb->rewind_pos].pos]);
gb->rewind_sequences[gb->rewind_pos].compressed_states[gb->rewind_sequences[gb->rewind_pos].pos] = NULL;
GB_load_state_from_buffer(gb, save_state, save_size);
free(save_state);
return true;
}
void GB_rewind_free(GB_gameboy_t *gb)
{
if (!gb->rewind_sequences) return;
for (unsigned i = 0; i < gb->rewind_buffer_length; i++) {
if (gb->rewind_sequences[i].key_state) {
free(gb->rewind_sequences[i].key_state);
}
for (unsigned j = 0; j < GB_REWIND_FRAMES_PER_KEY; j++) {
if (gb->rewind_sequences[i].compressed_states[j]) {
free(gb->rewind_sequences[i].compressed_states[j]);
}
}
}
free(gb->rewind_sequences);
gb->rewind_sequences = NULL;
}
void GB_set_rewind_length(GB_gameboy_t *gb, double seconds)
{
GB_rewind_free(gb);
if (seconds == 0) {
gb->rewind_buffer_length = 0;
}
else {
gb->rewind_buffer_length = (size_t) ceil(seconds * CPU_FREQUENCY / LCDC_PERIOD / GB_REWIND_FRAMES_PER_KEY);
}
}

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#ifndef rewind_h
#define rewind_h
#include "gb.h"
#ifdef GB_INTERNAL
void GB_rewind_push(GB_gameboy_t *gb);
void GB_rewind_free(GB_gameboy_t *gb);
#endif
bool GB_rewind_pop(GB_gameboy_t *gb);
void GB_set_rewind_length(GB_gameboy_t *gb, double seconds);
#endif