Initial trimui model s support

11 files changed, 140 insertions, 14 deletions

diff --git a/Makefile.trimui b/Makefile.trimui
new file mode 100644
index 0000000..20b03dd
--- /dev/null
+++ b/Makefile.trimui
@@ -0,0 +1,74 @@
+GIT_VERSION := "$(shell git describe --abbrev=7 --dirty --always)"
+
+PRGNAME = snes9x
+
+VIDEO_BACKEND = sdl
+INPUT_BACKEND = sdl
+SOUND_BACKEND = sdl
+
+PREFIX  = arm-buildroot-linux-gnueabi
+
+# define regarding OS, which compiler to use
+CC	= $(PREFIX)-gcc
+STRIP	= $(PREFIX)-strip
+AS	= $(PREFIX)-as
+GASM	= $(PREFIX)-g++
+
+SYSROOT := $(shell $(CC) --print-sysroot)
+SDL_CFLAGS := $(shell $(SYSROOT)/usr/bin/sdl-config --cflags)
+SDL_LIBS := $(shell $(SYSROOT)/usr/bin/sdl-config --libs)
+
+# change compilation / linking flag options
+CFLAGS	= -DLSB_FIRST -DFAST_ALIGNED_LSB_WORD_ACCESS -I. -Ilibretro-common/include -Isrc -DINLINE="inline" -DRIGHTSHIFT_IS_SAR
+CFLAGS	+= -Isource -I./shell/emu -I./shell/scalers -I./shell/emu -I./shell/audio -I./shell/menu -I./shell/video/sdl -I./shell/input -Ishell/headers
+
+CFLAGS	+= -Ofast -fsingle-precision-constant -fno-PIC -flto
+ifndef PROFILE
+CFLAGS	+= -falign-functions=1 -falign-jumps=1 -falign-loops=1 -falign-labels=1
+endif
+CFLAGS	+= -mcpu=arm926ej-s -mtune=arm926ej-s
+CFLAGS	+= -DNDEBUG -DLAGFIX -DAUDIO_FRAMESKIP -DNO_HIRES -DGIT_VERSION=\"$(GIT_VERSION)\" -DTRIMUI -fno-builtin -fno-exceptions -ffunction-sections -std=gnu99
+CFLAGS	+= -Wall -Wextra -pedantic -Wno-implicit-function-declaration -Wno-implicit-fallthrough -Wno-sign-compare -Wno-unused-variable -Wno-unused-function -Wno-uninitialized -Wno-strict-aliasing -Wno-overflow -fno-strict-overflow
+
+ifeq ($(PROFILE), YES)
+CFLAGS	+= -fprofile-generate=./profile
+else ifeq ($(PROFILE), APPLY)
+CFLAGS	+= -fprofile-use -fprofile-dir=./profile -fbranch-probabilities
+endif
+
+LDFLAGS = -lc -lgcc -lm $(SDL_LIBS) -no-pie -Wl,--as-needed -Wl,--gc-sections -s -flto
+ifeq ($(SOUND_BACKEND), portaudio)
+LDFLAGS	+= -lasound -lportaudio
+endif
+ifeq ($(SOUND_BACKEND), libao)
+LDFLAGS	+= -lao
+endif
+ifeq ($(SOUND_BACKEND), alsa)
+LDFLAGS	+= -lasound
+endif
+ifeq ($(SOUND_BACKEND), pulse)
+LDFLAGS	+= -lpulse -lpulse-simple
+endif
+
+ifeq ($(PROFILE), YES)
+LDFLAGS	+= -lgcov
+endif
+
+# Files to be compiled
+SRCDIR    = ./source ./shell/emu ./shell/scalers ./shell/audio/$(SOUND_BACKEND) ./shell/menu ./shell/video/$(VIDEO_BACKEND) ./shell/input/$(INPUT_BACKEND) ./shell/other
+VPATH     = $(SRCDIR)
+SRC_C   = $(foreach dir, $(SRCDIR), $(wildcard $(dir)/*.c))
+SRC_CP   = $(foreach dir, $(SRCDIR), $(wildcard $(dir)/*.cpp))
+OBJ_C   = $(notdir $(patsubst %.c, %.o, $(SRC_C)))
+OBJ_CP   = $(notdir $(patsubst %.cpp, %.o, $(SRC_CP)))
+OBJS     = $(OBJ_C) $(OBJ_CP)
+
+# Rules to make executable
+$(PRGNAME): $(OBJS)
+	$(CC) $(CFLAGS) -o $(PRGNAME) $^ $(LDFLAGS)
+
+$(OBJ_C) : %.o : %.c
+	$(CC) $(CFLAGS) -c -o $@ $<
+
+clean:
+	rm -f $(PRGNAME)$(EXESUFFIX) *.o
diff --git a/shell/audio/alsa/sound_output.c b/shell/audio/alsa/sound_output.c
index 5173bb6..4da70a7 100644
--- a/shell/audio/alsa/sound_output.c
+++ b/shell/audio/alsa/sound_output.c
@@ -132,6 +132,10 @@ void Audio_Write(int16_t* restrict buffer, uint32_t buffer_size)
 	}
 }
 
+bool Audio_Underrun_Likely() {
+	return false;
+}
+
 void Audio_Close()
 {
 	if (handle)
diff --git a/shell/audio/oss/sound_output.c b/shell/audio/oss/sound_output.c
index 2d32b1f..39a7ba3 100644
--- a/shell/audio/oss/sound_output.c
+++ b/shell/audio/oss/sound_output.c
@@ -49,6 +49,10 @@ void Audio_Write(int16_t* restrict buffer, uint32_t buffer_size)
 	write(oss_audio_fd, buffer, buffer_size * 4 );
 }
 
+bool Audio_Underrun_Likely() {
+	return false;
+}
+
 void Audio_Close()
 {
 	if (oss_audio_fd >= 0)
diff --git a/shell/audio/portaudio/sound_output.c b/shell/audio/portaudio/sound_output.c
index 226db5c..0c03c93 100644
--- a/shell/audio/portaudio/sound_output.c
+++ b/shell/audio/portaudio/sound_output.c
@@ -35,6 +35,10 @@ void Audio_Write(int16_t* restrict buffer, uint32_t buffer_size)
 	Pa_WriteStream( apu_stream, buffer, buffer_size);
 }
 
+bool Audio_Underrun_Likely() {
+	return false;
+}
+
 void Audio_Close()
 {
 	//Pa_Close();
diff --git a/shell/audio/sdl/sound_output.c b/shell/audio/sdl/sound_output.c
index f14bb1d..ae1ab83 100644
--- a/shell/audio/sdl/sound_output.c
+++ b/shell/audio/sdl/sound_output.c
@@ -1,11 +1,14 @@
 #include <sys/ioctl.h>
 #include <stdint.h>
+#include <stdbool.h>
 #include <fcntl.h>
 #include <unistd.h>
 #include <SDL/SDL.h>
 
 #include "sound_output.h"
 
+#define UNDERRUN_THRESHOLD 0.5
+
 static int32_t BUFFSIZE;
 static uint8_t *buffer;
 static uint32_t buf_read_pos = 0;
@@ -36,14 +39,20 @@ static int32_t sdl_read_buffer(uint8_t* data, int32_t len)
 
 static void sdl_write_buffer(uint8_t* data, int32_t len)
 {
+	SDL_LockAudio();
 	for(uint32_t i = 0; i < len; i += 4) 
 	{
-		if(buffered_bytes == BUFFSIZE) return; // just drop samples
+		while (buffered_bytes == BUFFSIZE) {
+			SDL_UnlockAudio();
+			usleep(1000);
+			SDL_LockAudio();
+    }
 		*(int32_t*)((char*)(buffer + buf_write_pos)) = *(int32_t*)((char*)(data + i));
 		//memcpy(buffer + buf_write_pos, data + i, 4);
 		buf_write_pos = (buf_write_pos + 4) % BUFFSIZE;
 		buffered_bytes += 4;
 	}
+	SDL_UnlockAudio();
 }
 
 void sdl_callback(void *unused, uint8_t *stream, int32_t len)
@@ -90,9 +99,15 @@ uint32_t Audio_Init()
 
 void Audio_Write(int16_t* restrict buffer, uint32_t buffer_size)
 {
-	SDL_LockAudio();
 	sdl_write_buffer(buffer, buffer_size * 4);
+}
+
+bool Audio_Underrun_Likely() {
+	bool underrun_likely = false;
+	SDL_LockAudio();
+	underrun_likely = buffered_bytes < BUFFSIZE * UNDERRUN_THRESHOLD;
 	SDL_UnlockAudio();
+	return underrun_likely;
 }
 
 void Audio_Close()
diff --git a/shell/audio/sound_output.h b/shell/audio/sound_output.h
index ba8a318..b770fbe 100644
--- a/shell/audio/sound_output.h
+++ b/shell/audio/sound_output.h
@@ -1,10 +1,12 @@
 #ifndef SOUND_OUTPUT_H
 #define SOUND_OUTPUT_H
 
+#include <stdbool.h>
 #include "shared.h"
 
 extern uint32_t Audio_Init();
 extern void Audio_Write(int16_t* restrict buffer, uint32_t buffer_size);
+extern bool Audio_Underrun_Likely();
 extern void Audio_Close();
 
 #endif
diff --git a/shell/emu/core.c b/shell/emu/core.c
index e20e43d..d4ff19d 100644
--- a/shell/emu/core.c
+++ b/shell/emu/core.c
@@ -274,6 +274,11 @@ static const uint32_t TblSkip[4][4] = {
 };
 #endif
 
+#ifdef AUDIO_FRAMESKIP
+#define MAX_SKIP_COUNT 3
+static uint32_t SkipCnt = 0;
+#endif
+
 void Emulation_Run (void)
 {
 #ifndef USE_BLARGG_APU
@@ -294,6 +299,21 @@ void Emulation_Run (void)
 #endif
 	Settings.HardDisableAudio = false;
 
+#ifdef AUDIO_FRAMESKIP
+	if (IPPU.RenderThisFrame) {
+		if (Audio_Underrun_Likely()) {
+			if (SkipCnt < MAX_SKIP_COUNT) {
+				SkipCnt++;
+				IPPU.RenderThisFrame = false;
+			} else {
+				SkipCnt = 0;
+			}
+		}
+	} else {
+		SkipCnt = 0;
+	}
+#endif
+
 	S9xMainLoop();
 
 #ifndef USE_BLARGG_APU
@@ -310,12 +330,12 @@ void Emulation_Run (void)
 #endif
 
 
-#ifdef FRAMESKIP
+#if defined(FRAMESKIP) || defined(AUDIO_FRAMESKIP)
 	if (IPPU.RenderThisFrame)
 	{
 #endif
 		Update_Video_Ingame();
-#ifdef FRAMESKIP
+#if defined(FRAMESKIP) || defined(AUDIO_FRAMESKIP)
 		IPPU.RenderThisFrame = false;
 	}
 	else
diff --git a/shell/headers/shared.h b/shell/headers/shared.h
index 968b9a2..0ceff9d 100644
--- a/shell/headers/shared.h
+++ b/shell/headers/shared.h
@@ -4,6 +4,9 @@
 #if defined(BITTBOY)
 #define SOUND_OUTPUT_FREQUENCY 22050
 #define SOUND_SAMPLES_SIZE 1024
+#elif defined(TRIMUI)
+#define SOUND_OUTPUT_FREQUENCY 32000
+#define SOUND_SAMPLES_SIZE 1024
 #elif defined(RS97)
 #define SOUND_OUTPUT_FREQUENCY 22050
 #define SOUND_SAMPLES_SIZE 1024
diff --git a/shell/input/sdl/input.c b/shell/input/sdl/input.c
index 885eaea..6ddc761 100644
--- a/shell/input/sdl/input.c
+++ b/shell/input/sdl/input.c
@@ -59,7 +59,7 @@ uint32_t S9xReadJoypad(int32_t port)
 			case SDL_KEYDOWN:
 				switch(event.key.keysym.sym)
 				{
-					case SDLK_RCTRL:
+					case SDLK_ESCAPE:
 					case SDLK_END:
 						emulator_state = 1;
 					break;
diff --git a/shell/menu/menu.c b/shell/menu/menu.c
index b79d5ab..a23ff59 100644
--- a/shell/menu/menu.c
+++ b/shell/menu/menu.c
@@ -81,16 +81,16 @@ static void config_load()
 		option.config_buttons[0][2] = SDLK_DOWN; // DOWN
 		option.config_buttons[0][3] = SDLK_LEFT; // LEFT
 
-		option.config_buttons[0][4] = SDLK_LCTRL; // A
-		option.config_buttons[0][5] = SDLK_LALT; // B
+		option.config_buttons[0][4] = SDLK_SPACE; // A
+		option.config_buttons[0][5] = SDLK_LCTRL; // B
 		option.config_buttons[0][6] = SDLK_LSHIFT; // X
-		option.config_buttons[0][7] = SDLK_SPACE; // Y
+		option.config_buttons[0][7] = SDLK_LALT; // Y
 
 		option.config_buttons[0][8] = SDLK_TAB; // L
 		option.config_buttons[0][9] = SDLK_BACKSPACE; // R
 
 		option.config_buttons[0][10] = SDLK_RETURN; // START
-		option.config_buttons[0][11] = SDLK_ESCAPE; // SELECT
+		option.config_buttons[0][11] = SDLK_RCTRL; // SELECT
 
 		option.fullscreen = 1;
 	}
@@ -222,14 +222,14 @@ static void Input_Remapping()
 							currentselection = 1;
 						}
                         break;
-                    case SDLK_LCTRL:
+                    case SDLK_SPACE:
                     case SDLK_RETURN:
                         pressed = 1;
 					break;
                     case SDLK_ESCAPE:
                         option.config_buttons[controls_chosen][currentselection - 1] = 0;
 					break;
-                    case SDLK_LALT:
+                    case SDLK_LCTRL:
                         exit_input = 1;
 					break;
                     case SDLK_LEFT:
@@ -439,11 +439,11 @@ void Menu()
                         break;
                     case SDLK_END:
                     case SDLK_RCTRL:
-                    case SDLK_LALT:
+                    case SDLK_LCTRL:
 						pressed = 1;
 						currentselection = 1;
 						break;
-                    case SDLK_LCTRL:
+                    case SDLK_SPACE:
                     case SDLK_RETURN:
                         pressed = 1;
                         break;
diff --git a/shell/video/sdl/video_blit.c b/shell/video/sdl/video_blit.c
index 0e489c0..6a8f748 100644
--- a/shell/video/sdl/video_blit.c
+++ b/shell/video/sdl/video_blit.c
@@ -54,7 +54,7 @@ void Init_Video()
 
 	SDL_ShowCursor(0);
 
-	sdl_screen = SDL_SetVideoMode(320, 240, 16, SDL_HWSURFACE);
+	sdl_screen = SDL_SetVideoMode(320, 240, 16, SDL_HWSURFACE | SDL_DOUBLEBUF);
 
 	backbuffer = SDL_CreateRGBSurface(SDL_SWSURFACE, 320, 240, 16, 0,0,0,0);