abstract common keyboard input between emus

src/crab.cr

@@ -47,14 +47,12 @@ module Crab
     end
 
     if rom.not_nil!.ends_with?(".gba")
-      gba = GBA::GBA.new bios.not_nil!, rom.not_nil!
-      gba.post_init
-      gba.run
+      emu = GBA::GBA.new bios.not_nil!, rom.not_nil!
     else
-      gb = GB::GB.new bios, rom.not_nil!, fifo, sync, headless
-      gb.post_init
-      gb.run
+      emu = GB::GB.new bios, rom.not_nil!, fifo, sync, headless
     end
+    emu.post_init
+    emu.run
   end
 end
 

src/crab/common/emu.cr

@@ -0,0 +1,29 @@
+abstract class Emu
+  def post_init : Nil
+  end
+
+  abstract def scheduler : Scheduler
+  abstract def run : Nil
+  abstract def handle_event(event : SDL::Event) : Nil
+  abstract def toggle_sync : Nil
+  abstract def toggle_blending : Nil
+
+  def handle_events(interval : Int) : Nil
+    scheduler.schedule interval, Proc(Nil).new { handle_events interval }
+    while event = SDL::Event.poll
+      case event
+      when SDL::Event::Quit then exit 0
+      when SDL::Event::JoyHat,
+           SDL::Event::JoyButton then handle_event(event)
+      when SDL::Event::Keyboard
+        case event.sym
+        when .tab? then toggle_sync if event.pressed?
+        when .m?   then toggle_blending if event.pressed?
+        when .q?   then exit 0
+        else            handle_event(event)
+        end
+      else nil
+      end
+    end
+  end
+end

src/crab/gb/apu.cr

@@ -29,7 +29,7 @@ module GB
     @audiospec : LibSDL::AudioSpec
     @obtained_spec : LibSDL::AudioSpec
 
-    setter sync : Bool
+    @sync : Bool = true
 
     def initialize(@gb : GB, headless : Bool, @sync : Bool)
       @sync = false if headless
@@ -57,6 +57,10 @@ module GB
       LibSDL.pause_audio 0 unless headless
     end
 
+    def toggle_sync : Nil
+      @sync = !@sync
+    end
+
     def tick_frame_sequencer : Nil
       @first_half_of_length_period = @frame_sequencer_stage & 1 == 0
       case @frame_sequencer_stage

src/crab/gb/gb.cr

@@ -16,7 +16,7 @@ require "./timer"
 DISPLAY_SCALE = {% unless flag? :graphics_test %} 4 {% else %} 1 {% end %}
 
 module GB
-  class GB
+  class GB < Emu
     getter bootrom : String?
     getter cgb_ptr : Pointer(Bool) { pointerof(@cgb_enabled) }
     getter cartridge : Cartridge
@@ -60,24 +60,23 @@ module GB
       timer.skip_boot
     end
 
-    def handle_events : Nil
-      while event = SDL::Event.poll
-        case event
-        when SDL::Event::Quit then exit 0
-        when SDL::Event::Keyboard,
-             SDL::Event::JoyHat,
-             SDL::Event::JoyButton then joypad.handle_joypad_event event
-        else nil
-        end
-      end
-      scheduler.schedule_gb 70224, ->handle_events, Scheduler::EventType::HandleInput
-    end
-
     def run : Nil
-      handle_events
+      handle_events(70224)
       loop do
         cpu.tick
       end
     end
+
+    def handle_event(event : SDL::Event) : Nil
+      joypad.handle_joypad_event event
+    end
+
+    def toggle_sync : Nil
+      apu.toggle_sync
+    end
+
+    def toggle_blending : Nil
+      puts "Blending not implemented for gb/gbc"
+    end
   end
 end

src/crab/gb/joypad.cr

@@ -47,7 +47,6 @@ module GB
         when .l?          then @select = event.pressed?
         when .b?, .j?     then @b = event.pressed?
         when .a?, .k?     then @a = event.pressed?
-        when .tab?        then @gb.apu.sync = !event.pressed?
         else                   nil
         end
       when SDL::Event::JoyHat

src/crab/gba/apu.cr

@@ -51,7 +51,7 @@ module GBA
       LibSDL.pause_audio 0
     end
 
-    def toggle_sync
+    def toggle_sync : Nil
       @sync = !@sync
     end
 

src/crab/gba/gba.cr

@@ -16,7 +16,7 @@ require "./dma"
 require "./debugger"
 
 module GBA
-  class GBA
+  class GBA < Emu
     getter! scheduler : Scheduler
     getter! cartridge : Cartridge
     getter! storage : Storage
@@ -36,7 +36,6 @@ module GBA
       @scheduler = Scheduler.new
       @cartridge = Cartridge.new rom_path
       @storage = Storage.new rom_path
-      handle_events
       handle_saves
 
       SDL.init(SDL::Init::VIDEO | SDL::Init::AUDIO | SDL::Init::JOYSTICK)
@@ -58,29 +57,29 @@ module GBA
       @debugger = Debugger.new self
     end
 
-    def handle_events : Nil
-      scheduler.schedule 280896, ->handle_events
-      while event = SDL::Event.poll
-        case event
-        when SDL::Event::Quit then exit 0
-        when SDL::Event::Keyboard,
-             SDL::Event::JoyHat,
-             SDL::Event::JoyButton then keypad.handle_keypad_event event
-        else nil
-        end
+    def run : Nil
+      handle_events(280896)
+      loop do
+        {% if flag? :debugger %} debugger.check_debug {% end %}
+        cpu.tick
       end
     end
 
+    def handle_event(event : SDL::Event) : Nil
+      keypad.handle_keypad_event event
+    end
+
+    def toggle_sync : Nil
+      apu.toggle_sync
+    end
+
+    def toggle_blending : Nil
+      display.toggle_blending
+    end
+
     def handle_saves : Nil
       scheduler.schedule 280896, ->handle_saves
       storage.write_save
     end
-
-    def run : Nil
-      loop do
-        {% if flag? :debugger %} debugger.check_debug {% end %}
-        cpu.tick
-      end
-    end
   end
 end

src/crab/gba/keypad.cr

@@ -69,10 +69,7 @@ module GBA
         when .a?, .k?     then @keyinput.a = bit
         when .w?          then @keyinput.l = bit
         when .r?          then @keyinput.r = bit
-          # Extras
-        when .tab? then @gba.apu.toggle_sync if event.pressed?
-        when .m?   then @gba.display.toggle_blending if event.pressed?
-        else            nil
+        else                   nil
         end
       when SDL::Event::JoyHat
         @keyinput.value |= 0x00F0