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