Refactor texture code + start splitting networking into threads.

main.c

@@ -2,6 +2,9 @@
 #include <SDL2/SDL_ttf.h>
 #include <stdio.h>
 
+#include <semaphore.h>
+#include <pthread.h>
+
 #include "texture.h"
 #include "audio.h"
 #include "net.h"
@@ -9,15 +12,18 @@
 
 #define SCREEN_WIDTH 640
 #define SCREEN_HEIGHT 480
+#define TEXT_LINES 20
+#define BODY_TEXT_LINES TEXT_LINES-2
+#define FONT_SIZE SCREEN_HEIGHT/TEXT_LINES
 
 #define PORT 55555
 
 typedef enum {
+	SOCKET_LISTEN,
 	SELECTING_DEVICE,
 	RECORDING,
 	RECORDED,
 	PLAYBACK,
-	SOCKET,
 } application_state;
 
 typedef struct {
@@ -25,6 +31,7 @@ typedef struct {
 	audio_state audio;
 	int device_index;
 	int update_ui;
+	sem_t sem;
 } state;
 
 int init();
@@ -32,6 +39,8 @@ void destroy();
 int select_device(SDL_KeyboardEvent* key_event, int max_index);
 void application_state_to_string(application_state state, char* string);
 
+void* peer_discovery_t(void* args);
+
 SDL_Window* window = NULL;
 SDL_Renderer* renderer = NULL;
 
@@ -39,6 +48,7 @@ int num_devices = 0;
 
 int handle_input(SDL_Event* event, state* state);
 void handle_task(state* state);
+void render_body_text(text_texture* textures, int len);
 int main(int argc, char* argv[])
 {
 	if (!init()) return 1;
@@ -46,33 +56,43 @@ int main(int argc, char* argv[])
 	num_devices = SDL_GetNumAudioDevices(1);
 	log_message(LOG_INFO, "Num audio devices: %i", num_devices);
 	char char_buffer[64];
-	char default_fmt[] = "Device selected: %i";
+	char device_selected_fmt[] = "Device selected: %i";
 
 	state state;
-	state.application_state = SOCKET;
+	//state.application_state = SOCKET_LISTEN;
+	state.application_state = SELECTING_DEVICE;
 	if (!audio_init(&state.audio)) return 1;
 	state.device_index = -1;
 	state.update_ui = 0;
+	sem_init(&state.sem, 0, 1);
 
 	text_texture display_text_texture;
-	text_texture_init(&display_text_texture, renderer);
+	text_texture_init(&display_text_texture, renderer, FONT_SIZE);
-	sprintf(char_buffer, default_fmt, state.device_index);
+	sprintf(char_buffer, device_selected_fmt, state.device_index);
 	text_texture_load(&display_text_texture, char_buffer);
 
-	text_texture device_textures[num_devices];
-	for (int i = 0; i < num_devices; i++) {
-		text_texture_init(&device_textures[i], renderer);
-		sprintf(char_buffer, "%i: %s", i, SDL_GetAudioDeviceName(i, 1));
-		text_texture_load(&device_textures[i], char_buffer);
-	}
-
 	text_texture state_text_texture;
-	text_texture_init(&state_text_texture, renderer);
+	text_texture_init(&state_text_texture, renderer, FONT_SIZE);
 	application_state_to_string(state.application_state, char_buffer);
 	text_texture_load(&state_text_texture, char_buffer);
 
+	text_texture_frame socket_frame;
+	text_texture_frame_init(&socket_frame, BODY_TEXT_LINES, renderer, FONT_SIZE);
+
+	text_texture_frame select_device_frame;
+	text_texture_frame_init(&select_device_frame, num_devices, renderer, FONT_SIZE);
+
+	for (int i = 0; i < select_device_frame.len; i++) {
+		sprintf(char_buffer, "%i: %s", i, SDL_GetAudioDeviceName(i, 1));
+		text_texture_load(&select_device_frame.textures[i], char_buffer);
+	}
+
+	pthread_t peer_discovery_thread;
+	pthread_create(&peer_discovery_thread, NULL, peer_discovery_t, &state);
+
 	SDL_Event event;
 	while (1) {
+		sem_wait(&state.sem);
 		while (SDL_PollEvent(&event)) {
 			SDL_Keycode keysym = event.key.keysym.sym;
 			switch (event.type) {
@@ -91,7 +111,7 @@ int main(int argc, char* argv[])
 		handle_task(&state);
 
 		if (state.update_ui) {
-			sprintf(char_buffer, default_fmt, state.device_index);
+			sprintf(char_buffer, device_selected_fmt, state.device_index);
 			text_texture_load(&display_text_texture, char_buffer);
 			application_state_to_string(state.application_state, char_buffer);
 			text_texture_load(&state_text_texture, char_buffer);
@@ -106,29 +126,29 @@ int main(int argc, char* argv[])
 		// Render
 		text_texture_render(&display_text_texture, 0, 0);
 
+		if (state.application_state == SOCKET_LISTEN) {
+			text_texture_frame_render(&socket_frame, 0, FONT_SIZE);
+		}
+
 		if (state.application_state == SELECTING_DEVICE) {
-			int text_y_offset_step = display_text_texture.height * 2;
+			text_texture_frame_render(&select_device_frame, 0, FONT_SIZE);
-			int text_y_offset = text_y_offset_step;
-			for (int i = 0; i < num_devices; i++) {
-				text_texture_render(&device_textures[i], 0, text_y_offset);
-				text_y_offset += text_y_offset_step;
-			}
 		}
 
 		text_texture_render(&state_text_texture, 0, SCREEN_HEIGHT - state_text_texture.height);
 
 		// Update the screen
 		SDL_RenderPresent(renderer);
+		sem_post(&state.sem);
 	}
 
 cleanup:
 	log_message(LOG_INFO, "Cleanup start");
 	audio_destroy(&state.audio);
 	log_message(LOG_INFO, "Audio done");
-	text_texture_free(&display_text_texture);
+	text_texture_destroy(&display_text_texture);
-	for (int i = 0; i < num_devices; i++) {
+	text_texture_destroy(&state_text_texture);
-		text_texture_free(&device_textures[i]);
+	text_texture_frame_destroy(&socket_frame);
-	}
+	text_texture_frame_destroy(&select_device_frame);
 	log_message(LOG_INFO, "Texture done");
 	destroy();
 	log_message(LOG_INFO, "Done");
@@ -140,6 +160,18 @@ int handle_input(SDL_Event* event, state* state)
 	SDL_Keycode keysym = event->key.keysym.sym;
 	switch (state->application_state) {
 
+	case SOCKET_LISTEN:
+		switch (keysym) {
+		case SDLK_1:
+			log_message(LOG_INFO, "Socket button 1 pressed");
+			net_broadcast();
+			break;
+		case SDLK_2:
+			log_message(LOG_INFO, "Socket button 2 pressed");
+			break;
+		}
+		break;
+
 	case SELECTING_DEVICE:
 		switch (keysym) {
 		case SDLK_y:
@@ -163,7 +195,6 @@ int handle_input(SDL_Event* event, state* state)
 		audio_device_close(&state->audio, 1);
 		audio_recording_init(&state->audio, state->device_index);
 		state->update_ui = 1;
-
 		break;
 
 	case RECORDING:
@@ -207,17 +238,6 @@ int handle_input(SDL_Event* event, state* state)
 		}
 		break;
 
-	case SOCKET:
-		switch (keysym) {
-		case SDLK_1:
-			log_message(LOG_INFO, "Socket button 1 pressed");
-			net_broadcast();
-			break;
-		case SDLK_2:
-			log_message(LOG_INFO, "Socket button 2 pressed");
-			net_listen_clients();
-			break;
-		}
 	}
 	return 1;
 }
@@ -226,6 +246,9 @@ void handle_task(state* state)
 {
 	switch (state->application_state) {
 
+	case SOCKET_LISTEN:
+		break;
+
 	case SELECTING_DEVICE:
 		break;
 
@@ -246,8 +269,6 @@ void handle_task(state* state)
 		}
 		break;
 
-	case SOCKET:
-		break;
 	}
 }
 
@@ -318,8 +339,11 @@ int select_device(SDL_KeyboardEvent* key_event, int max_index)
 void application_state_to_string(application_state state, char* string)
 {
 	switch (state) {
+	case SOCKET_LISTEN:
+		sprintf(string, "Socket");
+		break;
 	case SELECTING_DEVICE:
-		sprintf(string, "Selecting Device [0-9] -> [y/RET], ");
+		sprintf(string, "Selecting Device [0-9] -> [y/RET]");
 		break;
 	case RECORDING:
 		sprintf(string, "Recording [ESC]: CANCEL");
@@ -330,8 +354,16 @@ void application_state_to_string(application_state state, char* string)
 	case PLAYBACK:
 		sprintf(string, "Playing [ESC]: CANCEL");
 		break;
-	case SOCKET:
+	}
-		sprintf(string, "Socket");
+}
-		break;
+
+void* peer_discovery_t(void* args)
+{
+	state* state = args;
+	while (1) {
+		sem_wait(&state->sem);
+		net_listen_clients();
+		sem_post(&state->sem);
+		sleep(1);
 	}
 }

texture.c

@@ -1,11 +1,11 @@
 #include "texture.h"
 #include "log.h"
 
-int text_texture_init(text_texture* text_texture, SDL_Renderer* renderer)
+int text_texture_init(text_texture* text_texture, SDL_Renderer* renderer, int font_size)
 {
 	text_texture->texture = NULL;
 	text_texture->renderer = renderer;
-	text_texture->font = TTF_OpenFont("FiraCode-Regular.ttf", 24);
+	text_texture->font = TTF_OpenFont("FiraCode-Regular.ttf", font_size);
 	if (!text_texture->font) {
 		log_message(LOG_ERROR, "Failed to load font! TTF_Error: %s", TTF_GetError());
 		return 0;
@@ -23,6 +23,7 @@ int text_texture_load(text_texture* text_texture, char* string)
 	}
 
 	SDL_Color text_color = { 255, 255, 255 };
+	if (strlen(string) == 0) string = " ";
 	SDL_Surface* text_surface = TTF_RenderText_Solid(text_texture->font, string, text_color);
 	if (!text_surface) {
 		log_message(LOG_ERROR, "Unable to render text surface! TTF_Error: %s", TTF_GetError());
@@ -35,7 +36,7 @@ int text_texture_load(text_texture* text_texture, char* string)
 		return 0;
 	}
 
-	text_texture->texture = SDL_CreateTextureFromSurface(text_texture->renderer, text_surface);
+	text_texture->texture = texture;
 	text_texture->width = text_surface->w;
 	text_texture->height = text_surface->h;
 
@@ -62,11 +63,42 @@ int text_texture_render(text_texture* text_texture, int x, int y)
 	return 1;
 }
 
-int text_texture_free(text_texture* text_texture)
+int text_texture_destroy(text_texture* text_texture)
 {
 	if (!text_texture->texture) {
 		return 0;
 	}
 	SDL_DestroyTexture(text_texture->texture);
+	TTF_CloseFont(text_texture->font);
+	return 1;
+}
+
+int text_texture_frame_init(text_texture_frame* text_texture_frame, int len, SDL_Renderer* renderer, int font_size)
+{
+	text_texture_frame->textures = malloc(len*sizeof(text_texture));
+	for (int i = 0; i < len; i++) {
+		text_texture_init(&text_texture_frame->textures[i], renderer, font_size);
+	}
+	text_texture_frame->len = len;
+	return 1;
+}
+
+int text_texture_frame_render(text_texture_frame* text_texture_frame, int x, int y)
+{
+	int text_y_offset_step = TTF_FontHeight(text_texture_frame->textures[0].font);
+	int text_y_offset = y;
+	for (int i = 0; i < text_texture_frame->len; i++) {
+		text_texture_render(&text_texture_frame->textures[i], x, text_y_offset);
+		text_y_offset += text_y_offset_step;
+	}
+	return 1;
+}
+
+int text_texture_frame_destroy(text_texture_frame* text_texture_frame)
+{
+	for (int i = 0; i < text_texture_frame->len; i++) {
+		text_texture_destroy(&text_texture_frame->textures[i]);
+	}
+	free(text_texture_frame->textures);
 	return 1;
 }

texture.h

@@ -12,9 +12,18 @@ typedef struct {
 	int height;
 } text_texture;
 
-int text_texture_init(text_texture* text_texture, SDL_Renderer* renderer);
+typedef struct {
+	text_texture* textures;
+	int len;
+} text_texture_frame;
+
+int text_texture_init(text_texture* text_texture, SDL_Renderer* renderer, int font_size);
 int text_texture_load(text_texture* text_texture, char* string);
 int text_texture_render(text_texture* text_texture, int x, int y);
-int text_texture_free(text_texture* text_texture);
+int text_texture_destroy(text_texture* text_texture);
+
+int text_texture_frame_init(text_texture_frame* text_texture_frame, int len, SDL_Renderer* renderer, int font_size);
+int text_texture_frame_render(text_texture_frame* text_texture_frame, int x, int y);
+int text_texture_frame_destroy(text_texture_frame* text_texture_frame);
 
 #endif