Add first draft of microphone support

Makefile.common

@@ -66,6 +66,7 @@ SOURCES_CXX := $(MELON_DIR)/NDS.cpp \
                     $(MELON_DIR)/Wifi.cpp \
                     $(MELON_DIR)/WifiAP.cpp \
                     $(MELON_DIR)/frontend/Util_ROM.cpp \
+                    $(MELON_DIR)/frontend/Util_Audio.cpp \
                     $(CORE_DIR)/config.cpp \
                     $(CORE_DIR)/input.cpp \
                     $(CORE_DIR)/libretro.cpp \

src/NDSCart_SRAMManager.cpp

@@ -67,7 +67,7 @@ void DeInit()
     }
 #endif
 
-    if (SecondaryBuffer) delete SecondaryBuffer;
+    if (SecondaryBuffer) delete[] SecondaryBuffer;
     SecondaryBuffer = NULL;
 
     Platform::Mutex_Free(SecondaryBufferLock);
@@ -88,7 +88,7 @@ void Setup(const char* path, u8* buffer, u32 length)
     Buffer = buffer;
     Length = length;
 
-    if(SecondaryBuffer) delete SecondaryBuffer; // Delete secondary buffer, there might be previous state.
+    if(SecondaryBuffer) delete[] SecondaryBuffer; // Delete secondary buffer, there might be previous state.
 
     SecondaryBuffer = new u8[length];
     SecondaryBufferLength = length;

src/libretro/input.cpp

@@ -55,9 +55,24 @@ void update_input(InputState *state)
       state->lid_closed = lid_closed_btn;
    }
 
+   state->previous_holding_noise_btn = state->holding_noise_btn;
    state->holding_noise_btn = !!input_state_cb(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L2);
    state->swap_screens_btn = !!input_state_cb(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R2);
 
+   if (  micNoiseType == MicInput && // If the player wants to use their real mic...
+         noise_button_required && // ...and they don't always want it hot...
+         (state->holding_noise_btn != state->previous_holding_noise_btn) && // ...and they just pressed or released the button...
+         micHandle != NULL && micInterface.interface_version > 0 // ...and the mic is valid...
+   )
+   {
+      bool stateSet = micInterface.set_mic_state(micHandle, state->holding_noise_btn);
+      // ...then set the state of the mic to the active staste of the noise button
+
+      if (!stateSet)
+         log_cb(RETRO_LOG_ERROR, "[melonDS] Error setting state of microphone to %s\n",
+            state->holding_noise_btn ? "enabled" : "disabled");
+   }
+
    if(current_screen_layout != ScreenLayout::TopOnly)
    {
       switch(state->current_touch_mode)

src/libretro/input.h

@@ -2,6 +2,7 @@
 #define _INPUT_H
 
 #include "types.h"
+#include <libretro.h>
 
 enum TouchMode
 {
@@ -11,12 +12,20 @@ enum TouchMode
    Joystick,
 };
 
+enum MicInputMode
+{
+    BlowNoise,
+    WhiteNoise,
+    MicInput,
+};
+
 struct InputState
 {
    bool touching;
    int touch_x, touch_y;
    TouchMode current_touch_mode;
 
+   bool previous_holding_noise_btn = false;
    bool holding_noise_btn = false;
    bool swap_screens_btn = false;
    bool lid_closed = false;
@@ -27,6 +36,10 @@ extern InputState input_state;
 bool cursor_enabled(InputState *state);
 
 extern bool libretro_supports_bitmasks;
+extern bool noise_button_required;
+extern retro_microphone_interface micInterface;
+extern retro_microphone_t *micHandle;
+extern MicInputMode micNoiseType;
 
 void update_input(InputState *state);