Initial commit

.astylerc

@@ -0,0 +1,3 @@
+style=linux
+indent=tab
+align-pointer=type

.editorconfig

@@ -0,0 +1,5 @@
+root = true
+
+[*.c]
+indent_style = tab
+indent_size = 8

.gitignore

@@ -0,0 +1,5 @@
+obj/
+main
+*.out
+
+logfile.txt

example-test-code/main.c.bak

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+#include <SDL2/SDL.h>
+#include <SDL2/SDL_audio.h>
+#include <SDL2/SDL_image.h>
+#include <SDL2/SDL_ttf.h>
+#include <stdio.h>
+
+#include "log.h"
+
+const int SCREEN_WIDTH = 640;
+const int SCREEN_HEIGHT = 480;
+
+const int MAX_RECORDING_DEVICES = 10;
+const int MAX_RECORDING_SECONDS = 1;
+const int RECORDING_BUFFER_SECONDS = MAX_RECORDING_SECONDS + 1;
+/*
+ * Application
+ */
+int init();
+void destroy();
+int select_device(SDL_KeyboardEvent* key_event, int max_index);
+
+typedef enum {
+	SELECTING_DEVICE,
+	RECORDING,
+	RECORDED,
+	PLAYBACK,
+} application_state;
+
+typedef struct {
+	application_state application_state;
+	int device_index;
+	int recording_device_id;
+	int playback_device_id;
+} state;
+
+void application_state_to_string(application_state state, char* string);
+/*
+ * Visual
+ */
+SDL_Window* window = NULL;
+SDL_Renderer* renderer = NULL;
+TTF_Font* global_font = NULL;
+
+typedef struct {
+	SDL_Texture* texture;
+	int width;
+	int height;
+} text_texture;
+
+int text_texture_init(text_texture* text_texture);
+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);
+/*
+ * Audio
+ */
+int num_devices = 0;
+
+SDL_AudioSpec* recording_spec;
+SDL_AudioSpec* playback_spec;
+SDL_AudioSpec* received_recording_spec;
+SDL_AudioSpec* received_playback_spec;
+Uint8* recording_buffer = NULL;
+unsigned int recording_buffer_size = 0;
+unsigned int recording_buffer_position = 0;
+unsigned int recording_buffer_position_max = 0;
+
+SDL_AudioDeviceID audio_recording_init(int index, void* userdata);
+SDL_AudioDeviceID audio_playback_init(void* userdata);
+void audio_buffer_destroy();
+void audio_recording_callback( void* userdata, Uint8* stream, int len );
+void audio_playback_callback( void* userdata, Uint8* stream, int len );
+
+void handle_input(SDL_Event* event, state* state);
+void handle_task(state* state);
+int main(int argc, char* argv[])
+{
+	if (!init()) return 1;
+
+	num_devices = SDL_GetNumAudioDevices(1);
+	printf("Num audio devices: %i\n", num_devices);
+	char char_buffer[64];
+	char default_fmt[] = "Device selected: %i";
+
+	state state = {
+		SELECTING_DEVICE,
+		-1,
+		0,
+		0,
+	};
+
+	text_texture display_text_texture;
+	text_texture_init(&display_text_texture);
+	sprintf(char_buffer, default_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]);
+		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);
+	application_state_to_string(state.application_state, char_buffer);
+	text_texture_load(&state_text_texture, char_buffer);
+
+	SDL_Event event;
+	int running = 1;
+	while (running) {
+		while (SDL_PollEvent(&event)) {
+			SDL_Keycode keysym = event.key.keysym.sym;
+			switch (event.type) {
+
+			case SDL_QUIT:
+				running = 0;
+				break;
+
+			case SDL_KEYDOWN:
+				handle_input(&event, &state);
+
+				sprintf(char_buffer, default_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);
+				break;
+
+			}
+		}
+
+		handle_task(&state);
+
+		// Clear the screen
+		SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
+		SDL_RenderClear(renderer);
+
+		// Render
+		text_texture_render(&display_text_texture, 0, 0);
+
+		if (state.application_state == SELECTING_DEVICE) {
+			int text_y_offset_step = display_text_texture.height * 2;
+			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);
+	}
+
+	text_texture_free(&display_text_texture);
+	destroy();
+
+	return 0;
+}
+
+void handle_input(SDL_Event* event, state* state)
+{
+	SDL_Keycode keysym = event->key.keysym.sym;
+	switch (state->application_state) {
+
+	case SELECTING_DEVICE:
+		switch (keysym) {
+		case SDLK_y:
+		case SDLK_RETURN:
+			if (state->device_index == -1 || !state->recording_device_id) break;
+			recording_buffer_position = 0;
+			SDL_PauseAudioDevice(state->recording_device_id, 0);
+			/*SDL_UnlockAudioDevice(state->recording_device_id);*/
+			state->application_state = RECORDING;
+			break;
+		case SDLK_ESCAPE:
+			state->device_index = -1;
+			SDL_CloseAudioDevice(state->recording_device_id);
+			break;
+		}
+		int device_index_new = select_device(&event->key, num_devices);
+		if (device_index_new == -1) break;
+		if (state->device_index != -1 && device_index_new == -1) break;
+		state->device_index = device_index_new;
+		SDL_CloseAudioDevice(state->recording_device_id);
+		state->recording_device_id = audio_recording_init(state->device_index, NULL);
+		break;
+
+	case RECORDING:
+		switch (keysym) {
+		case SDLK_y:
+			SDL_PauseAudioDevice(state->recording_device_id, 0);
+			break;
+		case SDLK_q:
+		case SDLK_ESCAPE:
+			SDL_PauseAudioDevice(state->recording_device_id, 1);
+			audio_buffer_destroy();
+			state->application_state = SELECTING_DEVICE;
+			break;
+		}
+		break;
+
+	case RECORDED:
+		switch (keysym) {
+		case SDLK_y:
+		case SDLK_RETURN:
+			if (!state->playback_device_id) {
+				state->playback_device_id = audio_playback_init(NULL);
+				break;
+			}
+			recording_buffer_position = 0;
+			SDL_PauseAudioDevice(state->playback_device_id, 0);
+			/*SDL_UnlockAudioDevice(state->playback_device_id);*/
+			state->application_state = PLAYBACK;
+			break;
+		case SDLK_q:
+		case SDLK_ESCAPE:
+			audio_buffer_destroy();
+			state->application_state = SELECTING_DEVICE;
+			break;
+		}
+		break;
+
+	case PLAYBACK:
+		switch (keysym) {
+		case SDLK_q:
+		case SDLK_ESCAPE:
+			state->application_state = RECORDED;
+			break;
+		}
+		break;
+
+	}
+}
+
+void handle_task(state* state)
+{
+	switch (state->application_state) {
+
+	case SELECTING_DEVICE:
+		break;
+
+	case RECORDING:
+		SDL_LockAudioDevice(state->recording_device_id);
+		/*printf("buf pos: %u\n", recording_buffer_position);*/
+		if (recording_buffer_position >= recording_buffer_position_max) {
+			SDL_UnlockAudioDevice(state->recording_device_id);
+			SDL_PauseAudioDevice(state->recording_device_id, 1);
+			SDL_CloseAudioDevice(state->recording_device_id);
+			state->application_state = RECORDED;
+			break;
+		}
+		SDL_UnlockAudioDevice(state->recording_device_id);
+		break;
+
+	case RECORDED:
+		break;
+
+	case PLAYBACK:
+		SDL_LockAudioDevice(state->playback_device_id);
+		if (recording_buffer_position >= recording_buffer_position_max) {
+			SDL_UnlockAudioDevice(state->playback_device_id);
+			SDL_PauseAudioDevice(state->playback_device_id, 1);
+			SDL_CloseAudioDevice(state->playback_device_id);
+			state->application_state = RECORDED;
+			break;
+		}
+		SDL_UnlockAudioDevice(state->playback_device_id);
+		break;
+
+	}
+}
+
+int init()
+{
+	if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) < 0) {
+		printf("SDL could not initialize! SDL Error: %s\n", SDL_GetError());
+		return 0;
+	}
+
+	if (TTF_Init() == -1) {
+		printf("TTF could not initialize! TTF Error: %s\n", TTF_GetError());
+		return 0;
+	}
+
+	window = SDL_CreateWindow("SDL record", SDL_WINDOWPOS_UNDEFINED,
+	                          SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH,
+	                          SCREEN_HEIGHT, SDL_WINDOW_SHOWN);
+
+	if (!window) {
+		printf("Window could not be created! SDL Error: %s\n", SDL_GetError());
+		return 0;
+	}
+
+	renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
+	if (!renderer) {
+		printf("Renderer could not be created! SDL_Error: %s\n", SDL_GetError());
+		return 0;
+	}
+
+	global_font = TTF_OpenFont("FiraCode-Regular.ttf", 24);
+	if (!global_font) {
+		printf("Failed to load font! TTF_Error: %s\n", TTF_GetError());
+		return 0;
+	}
+
+	recording_spec = malloc(sizeof(SDL_AudioSpec));
+	received_recording_spec = malloc(sizeof(SDL_AudioSpec));
+	playback_spec = malloc(sizeof(SDL_AudioSpec));
+	received_playback_spec = malloc(sizeof(SDL_AudioSpec));
+	return 1;
+}
+
+void destroy()
+{
+	free(recording_spec);
+	free(received_recording_spec);
+	free(playback_spec);
+	free(received_playback_spec);
+	free(recording_buffer);
+
+	TTF_CloseFont(global_font);
+	SDL_DestroyRenderer(renderer);
+	SDL_DestroyWindow(window);
+	TTF_Quit();
+	SDL_Quit();
+}
+
+int select_device(SDL_KeyboardEvent* key_event, int max_index)
+{
+	SDL_Keycode keycode = key_event->keysym.sym;
+	SDL_Keycode mod = key_event->keysym.mod;
+
+	int keycode_is_num = (keycode >= SDLK_0 && keycode <= SDLK_9);
+	int no_mod = (mod == 0);
+	if (!keycode_is_num || !no_mod) {
+		printf("Not number: %c <%u>\n", keycode, keycode);
+		return -1;
+	} else {
+		printf("Is number: %c <%u>\n", keycode, keycode);
+	}
+
+	int index = keycode - SDLK_0;
+	if (index >= max_index) return -1;
+
+	return index;
+}
+
+void application_state_to_string(application_state state, char* string)
+{
+	switch (state) {
+	case SELECTING_DEVICE:
+		sprintf(string, "Selecting Device [0-9] -> [y/RET], ");
+		break;
+	case RECORDING:
+		sprintf(string, "Recording");
+		break;
+	case RECORDED:
+		sprintf(string, "Recorded");
+		break;
+	case PLAYBACK:
+		sprintf(string, "Playing");
+		break;
+	}
+}
+
+int text_texture_init(text_texture* text_texture)
+{
+	text_texture->texture = NULL;
+	text_texture->width = 0;
+	text_texture->height = 0;
+	return 1;
+}
+
+int text_texture_load(text_texture* text_texture, char* string)
+{
+	if (text_texture->texture) {
+		SDL_DestroyTexture(text_texture->texture);
+		text_texture->texture = NULL;
+	}
+
+	SDL_Color text_color = { 255, 255, 255 };
+	SDL_Surface* text_surface = TTF_RenderText_Solid(global_font, string, text_color);
+	if (!text_surface) {
+		printf("Unable to render text surface! TTF_Error: %s\n", TTF_GetError());
+		return 0;
+	}
+
+	SDL_Texture* texture = SDL_CreateTextureFromSurface(renderer, text_surface);
+	if (!texture) {
+		printf("Unable to create texture from rendered text! SDL_Error: %s\n", SDL_GetError());
+		return 0;
+	}
+
+	text_texture->texture = SDL_CreateTextureFromSurface(renderer, text_surface);
+	text_texture->width = text_surface->w;
+	text_texture->height = text_surface->h;
+
+	SDL_FreeSurface(text_surface);
+	return 1;
+}
+
+int text_texture_render(text_texture* text_texture, int x, int y)
+{
+	if (!text_texture) {
+		printf("text_texture uninitialized");
+		return 0;
+	}
+	if (!text_texture->texture) {
+		printf("text_texture->texture uninitialized");
+		return 0;
+	}
+
+	int quad_width = text_texture->width;
+	int quad_height = text_texture->height;
+	SDL_Rect render_quad = { x, y, quad_width, quad_height };
+	SDL_RenderCopy(renderer, text_texture->texture, NULL, &render_quad);
+
+	return 1;
+}
+
+int text_texture_free(text_texture* text_texture)
+{
+	if (!text_texture->texture) {
+		return 0;
+	}
+	SDL_DestroyTexture(text_texture->texture);
+	return 1;
+}
+
+SDL_AudioDeviceID audio_recording_init(int index, void* userdata)
+{
+	memset(recording_spec, 0, sizeof(SDL_AudioSpec));
+	memset(received_recording_spec, 0, sizeof(SDL_AudioSpec));
+	recording_spec->freq = 44100;
+	recording_spec->format = AUDIO_F32;
+	recording_spec->channels = 2;
+	recording_spec->samples = 4096;
+	recording_spec->callback = audio_recording_callback;
+	recording_spec->userdata = userdata;
+
+	SDL_AudioDeviceID device_id = SDL_OpenAudioDevice(SDL_GetAudioDeviceName(index, 1), 1, recording_spec, received_recording_spec, SDL_AUDIO_ALLOW_FORMAT_CHANGE);
+	printf("Recording Device: %s\n", SDL_GetAudioDeviceName(index, 1));
+	if (!device_id) {
+		printf("Failed to open recording device! SDL Error: %s", SDL_GetError());
+		return 0;
+	}
+
+	unsigned int bytes_per_sample = received_recording_spec->channels * (SDL_AUDIO_BITSIZE(received_recording_spec->format)/8);
+	unsigned int bytes_per_second = received_recording_spec->freq * bytes_per_sample;
+	recording_buffer_size = RECORDING_BUFFER_SECONDS * bytes_per_second;
+	recording_buffer_position_max = MAX_RECORDING_SECONDS * bytes_per_second;
+
+	recording_buffer = malloc(recording_buffer_size);
+	memset(recording_buffer, 0, recording_buffer_size);
+
+	return device_id;
+}
+
+SDL_AudioDeviceID audio_playback_init(void* userdata)
+{
+	if (!recording_buffer) {
+		printf("Audio buffer not initialized");
+		return 0;
+	}
+
+	memset(playback_spec, 0, sizeof(SDL_AudioSpec));
+	memset(received_playback_spec, 0, sizeof(SDL_AudioSpec));
+	playback_spec->freq = 44100;
+	playback_spec->format = AUDIO_F32;
+	playback_spec->channels = 2;
+	playback_spec->samples = 4096;
+	playback_spec->callback = audio_playback_callback;
+	playback_spec->callback = userdata;
+
+	SDL_AudioDeviceID device_id = SDL_OpenAudioDevice(NULL, 0, playback_spec, received_playback_spec, SDL_AUDIO_ALLOW_FORMAT_CHANGE);
+	if (!device_id) {
+		printf("Failed to open playback device! SDL Error: %s", SDL_GetError());
+		return 0;
+	}
+
+	return device_id;
+}
+
+int audio_device_stop(int device_id)
+{
+	SDL_PauseAudioDevice(device_id, 1);
+	SDL_CloseAudioDevice(device_id);
+	return 1;
+}
+
+void audio_buffer_destroy()
+{
+	free(recording_buffer);
+	recording_buffer = NULL;
+	recording_buffer_size = 0;
+	recording_buffer_position = 0;
+}
+
+void audio_recording_callback(void* userdata, Uint8* stream, int len)
+{
+	memcpy(&recording_buffer[recording_buffer_position], stream, len);
+	recording_buffer_position += len;
+	char string[64];
+	sprintf(string, "Record pos: %u %u", recording_buffer_position, len);
+	log_message(LOG_INFO, string);
+}
+
+void audio_playback_callback(void* userdata, Uint8* stream, int len)
+{
+	memcpy(stream, &recording_buffer[recording_buffer_position], len);
+	recording_buffer_position += len;
+	char string[64];
+	sprintf(string, "Playback pos: %u %u", recording_buffer_position, len);
+	log_message(LOG_INFO, string);
+}

example-test-code/main.c.bak1

@@ -0,0 +1,64 @@
+#include <SDL2/SDL.h>
+#include <SDL2/SDL_image.h>
+#include <SDL2/SDL_ttf.h>
+#include <stdio.h>
+
+#include "log.h"
+
+SDL_AudioSpec* desiredSpec;
+void audio_callback(void* userdata, Uint8* stream, int len)
+{
+	// Fill the audio buffer with data
+	char string[64];
+	sprintf(string, "stream: %u len: %u\n", stream, len);
+	printf(string, "stream: %u len: %u\n", stream, len);
+	log_message(LOG_INFO, string);
+}
+
+int main(int argc, char* argv[])
+{
+	if (SDL_Init(SDL_INIT_AUDIO) < 0) {
+		// Handle error
+	}
+
+	desiredSpec = malloc(sizeof(SDL_AudioSpec));
+	memset(desiredSpec, 0, sizeof(SDL_AudioSpec));
+	desiredSpec->freq = 44100; // Sample rate
+	desiredSpec->format = AUDIO_F32; // Audio format
+	desiredSpec->channels = 2;
+	desiredSpec->samples = 4096; // Buffer size
+	desiredSpec->callback = audio_callback; // Set the callback
+
+	SDL_AudioDeviceID audioDevice = SDL_OpenAudioDevice(SDL_GetAudioDeviceName(2, 1), 1, desiredSpec, NULL, SDL_AUDIO_ALLOW_FORMAT_CHANGE);
+	if (SDL_GetError()[0] != '\0') {
+		printf("SDL Error : %s\n", SDL_GetError());
+	}
+	printf("Name: %s\n", SDL_GetAudioDeviceName(2, 1));
+	if (audioDevice == 0) {
+		// Handle error
+	}
+
+	// Start audio playback
+	SDL_PauseAudioDevice(audioDevice, 0);
+	if (SDL_GetError()[0] != '\0') {
+		printf("SDL Error : %s\n", SDL_GetError());
+	}
+
+	SDL_Event event;
+	int running = 1;
+	while (running) {
+		while (SDL_PollEvent(&event)) {
+			SDL_Keycode keysym = event.key.keysym.sym;
+			switch (event.type) {
+			case SDL_QUIT:
+				running = 0;
+				break;
+			}
+		}
+	}
+
+	SDL_CloseAudioDevice(audioDevice);
+	SDL_Quit();
+	return 0;
+}
+

example-test-code/main.c.bak2

@@ -0,0 +1,98 @@
+#include <SDL2/SDL.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+typedef struct {
+	Uint8* data;
+	int current_pos;
+	int max_length;
+} BufferType;
+
+SDL_AudioDeviceID dev;
+
+void audio_callback(void* userdata, Uint8* stream, int len)
+{
+	BufferType* buffer = (BufferType*)userdata;
+
+	printf("callback: %u %u\n", *stream, len);
+	int space_left = buffer->max_length - buffer->current_pos;
+	if (space_left <= 0) {
+		// Buffer is full; stop the device
+		SDL_PauseAudioDevice(dev, 1);
+		printf("Buffer full, stopping recording.\n");
+		return;
+	}
+
+	if (len > space_left) {
+		len = space_left;
+	}
+
+	memcpy(buffer->data + buffer->current_pos, stream, len);
+	buffer->current_pos += len;
+}
+
+int main(int argc, char* argv[])
+{
+	if (SDL_Init(SDL_INIT_AUDIO) < 0) {
+		fprintf(stderr, "Failed to initialize SDL: %s\n", SDL_GetError());
+		return 1;
+	}
+
+	BufferType audio_buffer;
+	audio_buffer.max_length = 44100 * 5 * sizeof(float) * 2; // 5 seconds of stereo float audio
+	audio_buffer.data = (Uint8*)malloc(audio_buffer.max_length);
+	if (audio_buffer.data == NULL) {
+		fprintf(stderr, "Failed to allocate audio buffer\n");
+		SDL_Quit();
+		return 1;
+	}
+	audio_buffer.current_pos = 0;
+
+	SDL_AudioSpec desired_spec, obtained_spec;
+	SDL_zero(desired_spec);
+	desired_spec.freq = 44100;
+	desired_spec.format = AUDIO_F32SYS;
+	desired_spec.channels = 2;
+	desired_spec.samples = 512;
+	desired_spec.callback = audio_callback;
+	desired_spec.userdata = &audio_buffer;
+
+	dev = SDL_OpenAudioDevice(NULL, 1, &desired_spec, &obtained_spec, 0);
+	if (dev == 0) {
+		fprintf(stderr, "Failed to open audio device: %s\n", SDL_GetError());
+		free(audio_buffer.data);
+		SDL_Quit();
+		return 1;
+	}
+
+	printf("Audio device opened successfully.\n");
+	printf("Obtained Spec:\n");
+	printf(" Frequency: %d\n", obtained_spec.freq);
+	printf(" Format: 0x%X\n", obtained_spec.format);
+	printf(" Channels: %d\n", obtained_spec.channels);
+	printf(" Samples: %d\n", obtained_spec.samples);
+
+	SDL_PauseAudioDevice(dev, 0); // Start recording
+	printf("Recording started.\n");
+
+	SDL_Event event;
+	while (audio_buffer.current_pos < audio_buffer.max_length) {
+		while (SDL_PollEvent(&event)) {
+			if (event.type == SDL_QUIT) {
+				printf("Quit event received.\n");
+				goto cleanup;
+			}
+		}
+		SDL_Delay(100);
+	}
+
+	printf("Recording complete. Total bytes recorded: %d\n", audio_buffer.current_pos);
+
+cleanup:
+	SDL_PauseAudioDevice(dev, 1); // Stop recording
+	SDL_CloseAudioDevice(dev);
+	free(audio_buffer.data);
+	SDL_Quit();
+
+	return 0;
+}

example-test-code/temp.cpp

@@ -0,0 +1,85 @@
+#include <SDL2/SDL.h>
+#include <SDL2/SDL_audio.h>
+#include <SDL2/SDL_image.h>
+#include <SDL2/SDL_ttf.h>
+
+using namespace std;
+
+SDL_AudioSpec want, have;
+SDL_AudioDeviceID player;
+
+void SDLCALL callback_player( void* userdata, Uint8* stream, int len)
+{
+
+	for (int i = 0; i < len; i ++) {
+		auto value = Uint8(sin(i) * 1000);
+		stream[i] = value ;
+	}
+}
+
+auto setupAudioPlayer()
+{
+
+	printf("### Device Player ###\n");
+	int num = SDL_GetNumAudioDevices(false);
+	printf("num: %d\n", num);
+	for (int i = 0; i < num; i++) {
+		auto name = SDL_GetAudioDeviceName(i, false);
+		printf("%d: %s\n", i, name);
+	}
+
+	int deviceIndex;
+	printf("select device to player audio: ");
+	scanf("%d", &deviceIndex);
+	printf("\n");
+
+	SDL_memset(&want, 0, sizeof(want)); /* or SDL_zero(want) */
+	want.freq = 44100;
+	want.format = AUDIO_F32;
+	want.channels = 2;
+	want.samples = 1024;
+	want.callback = callback_player;  // you wrote this function elsewhere.
+	//want.size = 512;
+
+	SDL_AudioDeviceID player = SDL_OpenAudioDevice(SDL_GetAudioDeviceName(deviceIndex, false), SDL_FALSE, &want, &have, SDL_AUDIO_ALLOW_FORMAT_CHANGE);
+	if (player == 0) {
+		printf("Failed to open player device! SDL Error: %s", SDL_GetError());
+
+	} else {
+
+		printf("freq %d \nformat %d \nchannels %d \nsamples %d\n", have.freq, have.format, have.channels, have.samples);
+	}
+
+	return player;
+}
+
+void destroyAudio()
+{
+
+	SDL_CloseAudioDevice(player);
+	SDL_Quit();
+}
+
+int main(int n, char** args)
+{
+
+	int err = SDL_Init(SDL_INIT_AUDIO);
+	printf("error: %d", err);
+	if (err < 0) {
+		printf("erorr: %d\n", err);
+		printf("Failed to init audio! SDL Error: %s", SDL_GetError());
+	}
+	//recorder = setupAudioRecorder();
+	auto player = setupAudioPlayer();
+	printf("player: %d\n", player);
+	//loadWave();
+
+	printf("playing\n");
+	//SDL_PauseAudioDevice(recorder, 0);
+	SDL_PauseAudioDevice(player, 0);
+	//SDL_SemWait(sem);
+	SDL_Delay(10000);
+	destroyAudio();
+	//system("pause");
+	return 0;
+}

log.c

@@ -0,0 +1,29 @@
+// Chat GPT code
+#include "log.h"
+
+const char* get_current_time()
+{
+	static char buffer[20];
+	time_t now = time(NULL);
+	struct tm* tm_info = localtime(&now);
+	strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", tm_info);
+	return buffer;
+}
+
+void log_message(LogLevel level, const char* message)
+{
+	const char* level_strings[] = { "INFO", "WARNING", "ERROR" };
+
+	// Open the log file in append mode
+	FILE* log_file = fopen("logfile.txt", "a");
+	if (log_file == NULL) {
+		fprintf(stderr, "Could not open log file for writing.\n");
+		return;
+	}
+
+	// Write the log message to the file
+	fprintf(log_file, "[%s] [%s] %s\n", get_current_time(), level_strings[level], message);
+
+	// Close the log file
+	fclose(log_file);
+}

log.h

@@ -0,0 +1,14 @@
+// Chat GPT code
+#include <stdio.h>
+#include <time.h>
+#include <stdlib.h>
+
+typedef enum {
+	LOG_INFO,
+	LOG_WARNING,
+	LOG_ERROR
+} LogLevel;
+
+const char* get_current_time();
+
+void log_message(LogLevel level, const char* message);

main.c

@@ -0,0 +1,510 @@
+#include <SDL2/SDL.h>
+#include <SDL2/SDL_audio.h>
+#include <SDL2/SDL_image.h>
+#include <SDL2/SDL_ttf.h>
+#include <stdio.h>
+
+#include "log.h"
+
+const int SCREEN_WIDTH = 640;
+const int SCREEN_HEIGHT = 480;
+
+const int MAX_RECORDING_DEVICES = 10;
+const int MAX_RECORDING_SECONDS = 1;
+const int RECORDING_BUFFER_SECONDS = MAX_RECORDING_SECONDS + 1;
+/*
+ * Application
+ */
+int init();
+void destroy();
+int select_device(SDL_KeyboardEvent* key_event, int max_index);
+
+typedef enum {
+	SELECTING_DEVICE,
+	RECORDING,
+	RECORDED,
+	PLAYBACK,
+} application_state;
+
+typedef struct {
+	application_state application_state;
+	int device_index;
+	int recording_device_id;
+	int playback_device_id;
+} state;
+
+void application_state_to_string(application_state state, char* string);
+/*
+ * Visual
+ */
+SDL_Window* window = NULL;
+SDL_Renderer* renderer = NULL;
+TTF_Font* global_font = NULL;
+
+typedef struct {
+	SDL_Texture* texture;
+	int width;
+	int height;
+} text_texture;
+
+int text_texture_init(text_texture* text_texture);
+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);
+/*
+ * Audio
+ */
+int num_devices = 0;
+
+SDL_AudioSpec recording_spec;
+SDL_AudioSpec playback_spec;
+SDL_AudioSpec received_recording_spec;
+SDL_AudioSpec received_playback_spec;
+Uint8* recording_buffer = NULL;
+unsigned int recording_buffer_size = 0;
+unsigned int recording_buffer_position = 0;
+unsigned int recording_buffer_position_max = 0;
+
+SDL_AudioDeviceID audio_recording_init(int index, void* userdata);
+SDL_AudioDeviceID audio_playback_init(void* userdata);
+void audio_buffer_destroy();
+void audio_recording_callback( void* userdata, Uint8* stream, int len );
+void audio_playback_callback( void* userdata, Uint8* stream, int len );
+
+void handle_input(SDL_Event* event, state* state);
+void handle_task(state* state);
+int main(int argc, char* argv[])
+{
+	if (!init()) return 1;
+
+	num_devices = SDL_GetNumAudioDevices(1);
+	printf("Num audio devices: %i\n", num_devices);
+	char char_buffer[64];
+	char default_fmt[] = "Device selected: %i";
+
+	state state = {
+		SELECTING_DEVICE,
+		-1,
+		0,
+		0,
+	};
+
+	text_texture display_text_texture;
+	text_texture_init(&display_text_texture);
+	sprintf(char_buffer, default_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]);
+		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);
+	application_state_to_string(state.application_state, char_buffer);
+	text_texture_load(&state_text_texture, char_buffer);
+
+	SDL_Event event;
+	int running = 1;
+	while (running) {
+		while (SDL_PollEvent(&event)) {
+			SDL_Keycode keysym = event.key.keysym.sym;
+			switch (event.type) {
+
+			case SDL_QUIT:
+				running = 0;
+				break;
+
+			case SDL_KEYDOWN:
+				handle_input(&event, &state);
+				break;
+
+			}
+		}
+
+		handle_task(&state);
+
+		sprintf(char_buffer, default_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);
+
+		// Clear the screen
+		SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
+		SDL_RenderClear(renderer);
+
+		// Render
+		text_texture_render(&display_text_texture, 0, 0);
+
+		if (state.application_state == SELECTING_DEVICE) {
+			int text_y_offset_step = display_text_texture.height * 2;
+			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);
+	}
+
+	text_texture_free(&display_text_texture);
+	for (int i = 0; i < num_devices; i++) {
+		text_texture_free(&device_textures[i]);
+	}
+	destroy();
+
+	return 0;
+}
+
+void handle_input(SDL_Event* event, state* state)
+{
+	SDL_Keycode keysym = event->key.keysym.sym;
+	switch (state->application_state) {
+
+	case SELECTING_DEVICE:
+		switch (keysym) {
+		case SDLK_y:
+		case SDLK_RETURN:
+			SDL_CloseAudioDevice(state->recording_device_id);
+			state->recording_device_id = audio_recording_init(state->device_index, NULL);
+			if (state->device_index == -1 || !state->recording_device_id) break;
+			recording_buffer_position = 0;
+			SDL_PauseAudioDevice(state->recording_device_id, 0);
+			/*SDL_UnlockAudioDevice(state->recording_device_id);*/
+			state->application_state = RECORDING;
+			break;
+		case SDLK_ESCAPE:
+			state->device_index = -1;
+			SDL_CloseAudioDevice(state->recording_device_id);
+			break;
+		}
+		int device_index_new = select_device(&event->key, num_devices);
+		if (device_index_new == -1) break;
+		if (state->device_index != -1 && device_index_new == -1) break;
+		state->device_index = device_index_new;
+		break;
+
+	case RECORDING:
+		switch (keysym) {
+		case SDLK_y:
+			SDL_PauseAudioDevice(state->recording_device_id, 0);
+			break;
+		case SDLK_q:
+		case SDLK_ESCAPE:
+			SDL_PauseAudioDevice(state->recording_device_id, 1);
+			audio_buffer_destroy();
+			state->application_state = SELECTING_DEVICE;
+			break;
+		}
+		break;
+
+	case RECORDED:
+		switch (keysym) {
+		case SDLK_y:
+		case SDLK_RETURN:
+			SDL_CloseAudioDevice(state->playback_device_id);
+			state->playback_device_id = audio_playback_init(NULL);
+			recording_buffer_position = 0;
+			SDL_PauseAudioDevice(state->playback_device_id, 0);
+			/*SDL_UnlockAudioDevice(state->playback_device_id);*/
+			state->application_state = PLAYBACK;
+			break;
+		case SDLK_q:
+		case SDLK_ESCAPE:
+			audio_buffer_destroy();
+			state->application_state = SELECTING_DEVICE;
+			break;
+		}
+		break;
+
+	case PLAYBACK:
+		switch (keysym) {
+		case SDLK_q:
+		case SDLK_ESCAPE:
+			state->application_state = RECORDED;
+			break;
+		}
+		break;
+
+	}
+}
+
+void handle_task(state* state)
+{
+	switch (state->application_state) {
+
+	case SELECTING_DEVICE:
+		break;
+
+	case RECORDING:
+		SDL_LockAudioDevice(state->recording_device_id);
+		/*printf("buf pos: %u\n", recording_buffer_position);*/
+		if (recording_buffer_position >= recording_buffer_position_max) {
+			SDL_UnlockAudioDevice(state->recording_device_id);
+			SDL_PauseAudioDevice(state->recording_device_id, 1);
+			SDL_CloseAudioDevice(state->recording_device_id);
+			state->application_state = RECORDED;
+			break;
+		}
+		SDL_UnlockAudioDevice(state->recording_device_id);
+		break;
+
+	case RECORDED:
+		break;
+
+	case PLAYBACK:
+		SDL_LockAudioDevice(state->playback_device_id);
+		if (recording_buffer_position >= recording_buffer_position_max) {
+			SDL_UnlockAudioDevice(state->playback_device_id);
+			SDL_PauseAudioDevice(state->playback_device_id, 1);
+			SDL_CloseAudioDevice(state->playback_device_id);
+			state->application_state = RECORDED;
+			break;
+		}
+		SDL_UnlockAudioDevice(state->playback_device_id);
+		break;
+
+	}
+}
+
+int init()
+{
+	if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) < 0) {
+		printf("SDL could not initialize! SDL Error: %s\n", SDL_GetError());
+		return 0;
+	}
+
+	if (TTF_Init() == -1) {
+		printf("TTF could not initialize! TTF Error: %s\n", TTF_GetError());
+		return 0;
+	}
+
+	window = SDL_CreateWindow("SDL record", SDL_WINDOWPOS_UNDEFINED,
+	                          SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH,
+	                          SCREEN_HEIGHT, SDL_WINDOW_SHOWN);
+
+	if (!window) {
+		printf("Window could not be created! SDL Error: %s\n", SDL_GetError());
+		return 0;
+	}
+
+	renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
+	if (!renderer) {
+		printf("Renderer could not be created! SDL_Error: %s\n", SDL_GetError());
+		return 0;
+	}
+
+	global_font = TTF_OpenFont("FiraCode-Regular.ttf", 24);
+	if (!global_font) {
+		printf("Failed to load font! TTF_Error: %s\n", TTF_GetError());
+		return 0;
+	}
+
+	return 1;
+}
+
+void destroy()
+{
+	free(recording_buffer);
+
+	TTF_CloseFont(global_font);
+	SDL_DestroyRenderer(renderer);
+	SDL_DestroyWindow(window);
+	TTF_Quit();
+	SDL_Quit();
+}
+
+int select_device(SDL_KeyboardEvent* key_event, int max_index)
+{
+	SDL_Keycode keycode = key_event->keysym.sym;
+	SDL_Keycode mod = key_event->keysym.mod;
+
+	int keycode_is_num = (keycode >= SDLK_0 && keycode <= SDLK_9);
+	int no_mod = (mod == 0);
+	if (!keycode_is_num || !no_mod) {
+		printf("Not number: %c <%u>\n", keycode, keycode);
+		return -1;
+	} else {
+		printf("Is number: %c <%u>\n", keycode, keycode);
+	}
+
+	int index = keycode - SDLK_0;
+	if (index >= max_index) return -1;
+
+	return index;
+}
+
+void application_state_to_string(application_state state, char* string)
+{
+	switch (state) {
+	case SELECTING_DEVICE:
+		sprintf(string, "Selecting Device [0-9] -> [y/RET], ");
+		break;
+	case RECORDING:
+		sprintf(string, "Recording");
+		break;
+	case RECORDED:
+		sprintf(string, "Recorded");
+		break;
+	case PLAYBACK:
+		sprintf(string, "Playing");
+		break;
+	}
+}
+
+int text_texture_init(text_texture* text_texture)
+{
+	text_texture->texture = NULL;
+	text_texture->width = 0;
+	text_texture->height = 0;
+	return 1;
+}
+
+int text_texture_load(text_texture* text_texture, char* string)
+{
+	if (text_texture->texture) {
+		SDL_DestroyTexture(text_texture->texture);
+		text_texture->texture = NULL;
+	}
+
+	SDL_Color text_color = { 255, 255, 255 };
+	SDL_Surface* text_surface = TTF_RenderText_Solid(global_font, string, text_color);
+	if (!text_surface) {
+		printf("Unable to render text surface! TTF_Error: %s\n", TTF_GetError());
+		return 0;
+	}
+
+	SDL_Texture* texture = SDL_CreateTextureFromSurface(renderer, text_surface);
+	if (!texture) {
+		printf("Unable to create texture from rendered text! SDL_Error: %s\n", SDL_GetError());
+		return 0;
+	}
+
+	text_texture->texture = SDL_CreateTextureFromSurface(renderer, text_surface);
+	text_texture->width = text_surface->w;
+	text_texture->height = text_surface->h;
+
+	SDL_FreeSurface(text_surface);
+	return 1;
+}
+
+int text_texture_render(text_texture* text_texture, int x, int y)
+{
+	if (!text_texture) {
+		printf("text_texture uninitialized");
+		return 0;
+	}
+	if (!text_texture->texture) {
+		printf("text_texture->texture uninitialized");
+		return 0;
+	}
+
+	int quad_width = text_texture->width;
+	int quad_height = text_texture->height;
+	SDL_Rect render_quad = { x, y, quad_width, quad_height };
+	SDL_RenderCopy(renderer, text_texture->texture, NULL, &render_quad);
+
+	return 1;
+}
+
+int text_texture_free(text_texture* text_texture)
+{
+	if (!text_texture->texture) {
+		return 0;
+	}
+	SDL_DestroyTexture(text_texture->texture);
+	return 1;
+}
+
+SDL_AudioDeviceID audio_recording_init(int index, void* userdata)
+{
+	SDL_zero(recording_spec);
+	recording_spec.freq = 44100;
+	recording_spec.format = AUDIO_F32;
+	recording_spec.channels = 2;
+	recording_spec.samples = 4096;
+	recording_spec.callback = audio_recording_callback;
+	recording_spec.userdata = userdata;
+
+	SDL_AudioDeviceID device_id = SDL_OpenAudioDevice(SDL_GetAudioDeviceName(index, 1), 1, &recording_spec, &received_recording_spec, SDL_AUDIO_ALLOW_FORMAT_CHANGE);
+	printf("Recording Device: %s\n", SDL_GetAudioDeviceName(index, 1));
+	if (!device_id) {
+		printf("Failed to open recording device! SDL Error: %s", SDL_GetError());
+		return 0;
+	}
+
+	unsigned int bytes_per_sample = received_recording_spec.channels * (SDL_AUDIO_BITSIZE(received_recording_spec.format)/8);
+	unsigned int bytes_per_second = received_recording_spec.freq * bytes_per_sample;
+	recording_buffer_size = RECORDING_BUFFER_SECONDS * bytes_per_second;
+	recording_buffer_position_max = MAX_RECORDING_SECONDS * bytes_per_second;
+
+	recording_buffer = malloc(recording_buffer_size);
+	memset(recording_buffer, 0, recording_buffer_size);
+
+	return device_id;
+}
+
+SDL_AudioDeviceID audio_playback_init(void* userdata)
+{
+	if (!recording_buffer) {
+		printf("Audio buffer not initialized");
+		return 0;
+	}
+
+	SDL_zero(playback_spec);
+	playback_spec.freq = 44100;
+	playback_spec.format = AUDIO_F32;
+	playback_spec.channels = 2;
+	playback_spec.samples = 4096;
+	playback_spec.callback = audio_playback_callback;
+	playback_spec.callback = userdata;
+
+	SDL_AudioDeviceID device_id = SDL_OpenAudioDevice(NULL, 0, &playback_spec, &received_playback_spec, SDL_AUDIO_ALLOW_FORMAT_CHANGE);
+	if (!device_id) {
+		printf("Failed to open playback device! SDL Error: %s", SDL_GetError());
+		return 0;
+	}
+
+	return device_id;
+}
+
+int audio_device_stop(int device_id)
+{
+	SDL_PauseAudioDevice(device_id, 1);
+	SDL_CloseAudioDevice(device_id);
+	return 1;
+}
+
+void audio_buffer_destroy()
+{
+	free(recording_buffer);
+	recording_buffer = NULL;
+	recording_buffer_size = 0;
+	recording_buffer_position = 0;
+}
+
+void audio_recording_callback(void* userdata, Uint8* stream, int len)
+{
+	memcpy(&recording_buffer[recording_buffer_position], stream, len);
+	recording_buffer_position += len;
+	char string[64];
+	sprintf(string, "Record pos: %u %u", recording_buffer_position, len);
+	printf(string, "Record pos: %u %u\n", recording_buffer_position, len);
+	log_message(LOG_INFO, string);
+}
+
+void audio_playback_callback(void* userdata, Uint8* stream, int len)
+{
+	memcpy(stream, &recording_buffer[recording_buffer_position], len);
+	recording_buffer_position += len;
+	char string[64];
+	sprintf(string, "Playback pos: %u %u", recording_buffer_position, len);
+	printf(string, "Playback pos: %u %u", recording_buffer_position, len);
+	log_message(LOG_INFO, string);
+}

makefile

@@ -0,0 +1,29 @@
+CC = gcc
+
+OBJD = obj
+SRCS := $(wildcard *.c)
+OBJS := $(SRCS:%.c=$(OBJD)/%.o)
+
+# Compiler flags
+CCFLAGS = -g
+LDFLAGS = -lSDL2 -lSDL2_image -lSDL2_ttf
+
+# Target executable name
+TARGET = main
+
+# Build target
+all: $(TARGET)
+
+$(TARGET): $(OBJS)
+	$(CC) $(CCFLAGS) $^ -o $(TARGET) $(LDFLAGS) 
+
+$(OBJS): $(OBJD)/%.o: %.c
+	mkdir -p $(@D)
+	$(CC) $(CCFLAGS) -c $? -o $@
+
+clean:
+	rm -r $(TARGET) $(OBJD)
+
+run: $(TARGET)
+	./$(TARGET)
+