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Refactor audio and texture into own files

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This commit is contained in:
Sheldon Lee 2024-10-13 22:43:33 +08:00
parent 92d3e150cb
commit 64195dd5a9
7 changed files with 293 additions and 259 deletions
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130
audio.c Normal file
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@ -0,0 +1,130 @@
#include "audio.h"
#include "log.h"
const int MAX_RECORDING_SECONDS = 1;
static SDL_AudioSpec recording_spec;
static SDL_AudioSpec playback_spec;
static SDL_AudioSpec received_recording_spec;
static SDL_AudioSpec received_playback_spec;
int audio_init(audio_state* state)
{
state->recording_device_id = 0;
state->playback_device_id = 0;
SDL_zero(recording_spec);
recording_spec.freq = 44100;
recording_spec.format = AUDIO_S16;
recording_spec.channels = 2;
recording_spec.samples = 4096;
recording_spec.callback = audio_recording_callback;
recording_spec.userdata = state;
SDL_zero(playback_spec);
playback_spec.freq = 44100;
playback_spec.format = AUDIO_S16;
playback_spec.channels = 2;
playback_spec.samples = 4096;
playback_spec.callback = audio_playback_callback;
playback_spec.userdata = state;
state->recording_buffer = NULL;
state->recording_buffer_size = 0;
state->recording_buffer_position = 0;
return 1;
}
int audio_recording_init(audio_state* state, int index)
{
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;
}
state->recording_device_id = device_id;
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;
state->recording_buffer_size = MAX_RECORDING_SECONDS * bytes_per_second;
if (state->recording_buffer) free(state->recording_buffer);
state->recording_buffer = malloc(state->recording_buffer_size);
memset(state->recording_buffer, 0, state->recording_buffer_size);
return 1;
}
void audio_destroy(audio_state* state)
{
free(state->recording_buffer);
SDL_CloseAudioDevice(state->recording_device_id);
SDL_CloseAudioDevice(state->playback_device_id);
}
int audio_playback_init(audio_state* state)
{
if (!state->recording_buffer) {
printf("Audio buffer not initialized");
return 0;
}
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;
}
state->playback_device_id = device_id;
return 1;
}
void audio_recording_callback(void* userdata, Uint8* stream, int len)
{
char string[64];
audio_state* state = userdata;
int space_left = state->recording_buffer_size - state->recording_buffer_position;
if (space_left <= 0) {
sprintf(string, "Stopping recording ID: %i", state->recording_device_id);
log_message(LOG_INFO, string);
SDL_PauseAudioDevice(state->recording_device_id, 1);
return;
}
if (len > space_left) {
len = space_left;
}
memcpy(&state->recording_buffer[state->recording_buffer_position], stream, len);
state->recording_buffer_position += len;
sprintf(string, "Record pos: %u/%u (%u)", state->recording_buffer_position, state->recording_buffer_size, len);
log_message(LOG_INFO, string);
}
void audio_playback_callback(void* userdata, Uint8* stream, int len)
{
char string[64];
audio_state* state = userdata;
int space_left = state->recording_buffer_size - state->recording_buffer_position;
if (space_left <= 0) {
sprintf(string, "Stopping playback ID: %i", state->recording_device_id);
log_message(LOG_INFO, string);
SDL_PauseAudioDevice(state->playback_device_id, 1);
return;
}
if (len > space_left) {
len = space_left;
}
memcpy(stream, &state->recording_buffer[state->recording_buffer_position], len);
state->recording_buffer_position += len;
sprintf(string, "Playback pos: %u/%u (%u)", state->recording_buffer_position, state->recording_buffer_size, len);
log_message(LOG_INFO, string);
}

21
audio.h Normal file
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@ -0,0 +1,21 @@
#ifndef AUDIO_H
#define AUDIO_H
#include <SDL2/SDL.h>
typedef struct audio_state {
int recording_device_id;
int playback_device_id;
Uint8* recording_buffer;
unsigned int recording_buffer_size;
unsigned int recording_buffer_position;
} audio_state;
int audio_init(audio_state* state);
void audio_destroy(audio_state* state);
int audio_recording_init(audio_state* state, int index);
int audio_playback_init(audio_state* state);
void audio_recording_callback(void* userdata, Uint8* stream, int len);
void audio_playback_callback(void* userdata, Uint8* stream, int len);
#endif

5
log.h
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@ -1,4 +1,7 @@
// Chat GPT code
#ifndef LOG_H
#define LOG_H
#include <stdio.h>
#include <time.h>
#include <stdlib.h>
@ -12,3 +15,5 @@ typedef enum {
const char* get_current_time();
void log_message(LogLevel level, const char* message);
#endif

298
main.c
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@ -2,19 +2,12 @@
#include <SDL2/SDL_ttf.h>
#include <stdio.h>
#include "log.h"
#include "texture.h"
#include "audio.h"
const int SCREEN_WIDTH = 640;
const int SCREEN_HEIGHT = 480;
const int MAX_RECORDING_DEVICES = 10;
const int MAX_RECORDING_SECONDS = 1;
/*
* Application
*/
int init();
void destroy();
int select_device(SDL_KeyboardEvent* key_event, int max_index);
typedef enum {
SELECTING_DEVICE,
RECORDING,
@ -22,49 +15,23 @@ typedef enum {
PLAYBACK,
} application_state;
typedef struct {
typedef struct state {
application_state application_state;
audio_state audio;
int device_index;
int recording_device_id;
int playback_device_id;
} state;
int init();
void destroy();
int select_device(SDL_KeyboardEvent* key_event, int max_index);
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;
SDL_AudioDeviceID audio_recording_init(int index);
SDL_AudioDeviceID audio_playback_init();
void audio_recording_callback( void* userdata, Uint8* stream, int len );
void audio_playback_callback( void* userdata, Uint8* stream, int len );
int handle_input(SDL_Event* event, state* state);
void handle_task(state* state);
int main(int argc, char* argv[])
@ -76,46 +43,28 @@ int main(int argc, char* argv[])
char char_buffer[64];
char default_fmt[] = "Device selected: %i";
state state = {
SELECTING_DEVICE,
-1,
0,
0,
};
state state;
state.application_state = SELECTING_DEVICE;
audio_init(&state.audio);
state.device_index = -1;
text_texture display_text_texture;
text_texture_init(&display_text_texture);
text_texture_init(&display_text_texture, renderer);
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]);
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);
text_texture_init(&state_text_texture, renderer);
application_state_to_string(state.application_state, char_buffer);
text_texture_load(&state_text_texture, char_buffer);
SDL_zero(recording_spec);
recording_spec.freq = 44100;
recording_spec.format = AUDIO_S16;
recording_spec.channels = 2;
recording_spec.samples = 4096;
recording_spec.callback = audio_recording_callback;
recording_spec.userdata = &state;
SDL_zero(playback_spec);
playback_spec.freq = 44100;
playback_spec.format = AUDIO_S16;
playback_spec.channels = 2;
playback_spec.samples = 4096;
playback_spec.callback = audio_playback_callback;
playback_spec.userdata = &state;
SDL_Event event;
while (1) {
while (SDL_PollEvent(&event)) {
@ -164,8 +113,7 @@ int main(int argc, char* argv[])
cleanup:
printf("Cleanup\n");
SDL_CloseAudioDevice(state.recording_device_id);
SDL_CloseAudioDevice(state.playback_device_id);
audio_destroy(&state.audio);
text_texture_free(&display_text_texture);
for (int i = 0; i < num_devices; i++) {
text_texture_free(&device_textures[i]);
@ -184,15 +132,12 @@ int handle_input(SDL_Event* event, state* state)
switch (keysym) {
case SDLK_y:
case SDLK_RETURN:
/*if (state->recording_device_id)*/
/* 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;
SDL_LockAudioDevice(state->recording_device_id);
memset(recording_buffer, 0, recording_buffer_size);
recording_buffer_position = 0;
SDL_UnlockAudioDevice(state->recording_device_id);
SDL_PauseAudioDevice(state->recording_device_id, 0);
if (state->device_index == -1 || !state->audio.recording_device_id) break;
SDL_LockAudioDevice(state->audio.recording_device_id);
memset(state->audio.recording_buffer, 0, state->audio.recording_buffer_size);
state->audio.recording_buffer_position = 0;
SDL_UnlockAudioDevice(state->audio.recording_device_id);
SDL_PauseAudioDevice(state->audio.recording_device_id, 0);
state->application_state = RECORDING;
break;
case SDLK_q:
@ -204,8 +149,8 @@ int handle_input(SDL_Event* event, state* state)
if (device_index_new == -1) break;
if (device_index_new == state->device_index) break;
state->device_index = device_index_new;
SDL_CloseAudioDevice(state->recording_device_id);
state->recording_device_id = audio_recording_init(state->device_index);
SDL_CloseAudioDevice(state->audio.recording_device_id);
audio_recording_init(&state->audio, state->device_index);
break;
@ -213,7 +158,7 @@ int handle_input(SDL_Event* event, state* state)
switch (keysym) {
case SDLK_q:
case SDLK_ESCAPE:
SDL_PauseAudioDevice(state->recording_device_id, 1);
SDL_PauseAudioDevice(state->audio.recording_device_id, 1);
state->application_state = SELECTING_DEVICE;
break;
}
@ -223,12 +168,12 @@ int handle_input(SDL_Event* event, state* state)
switch (keysym) {
case SDLK_y:
case SDLK_RETURN:
if (!state->playback_device_id)
state->playback_device_id = audio_playback_init();
SDL_LockAudioDevice(state->playback_device_id);
recording_buffer_position = 0;
SDL_UnlockAudioDevice(state->playback_device_id);
SDL_PauseAudioDevice(state->playback_device_id, 0);
if (!state->audio.playback_device_id)
audio_playback_init(&state->audio);
SDL_LockAudioDevice(state->audio.playback_device_id);
state->audio.recording_buffer_position = 0;
SDL_UnlockAudioDevice(state->audio.playback_device_id);
SDL_PauseAudioDevice(state->audio.playback_device_id, 0);
state->application_state = PLAYBACK;
break;
case SDLK_q:
@ -242,7 +187,7 @@ int handle_input(SDL_Event* event, state* state)
switch (keysym) {
case SDLK_q:
case SDLK_ESCAPE:
SDL_PauseAudioDevice(state->playback_device_id, 1);
SDL_PauseAudioDevice(state->audio.playback_device_id, 1);
state->application_state = RECORDED;
break;
}
@ -260,7 +205,7 @@ void handle_task(state* state)
break;
case RECORDING:
if (recording_buffer_position >= recording_buffer_size)
if (state->audio.recording_buffer_position >= state->audio.recording_buffer_size)
state->application_state = RECORDED;
break;
@ -268,7 +213,7 @@ void handle_task(state* state)
break;
case PLAYBACK:
if (recording_buffer_position >= recording_buffer_size)
if (state->audio.recording_buffer_position >= state->audio.recording_buffer_size)
state->application_state = RECORDED;
break;
@ -302,20 +247,11 @@ int init()
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();
@ -325,11 +261,12 @@ void destroy()
int select_device(SDL_KeyboardEvent* key_event, int max_index)
{
SDL_Keycode keycode = key_event->keysym.sym;
SDL_Keycode mod = key_event->keysym.mod;
/*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) {
/*int no_mod = (mod == 0);*/
/*if (!keycode_is_num || !no_mod) {*/
if (!keycode_is_num) {
printf("Not number: %c <%u>\n", keycode, keycode);
return -1;
} else {
@ -359,158 +296,3 @@ void application_state_to_string(application_state state, char* string)
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)
{
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 = MAX_RECORDING_SECONDS * bytes_per_second;
if (recording_buffer) free(recording_buffer);
recording_buffer = malloc(recording_buffer_size);
memset(recording_buffer, 0, recording_buffer_size);
return device_id;
}
SDL_AudioDeviceID audio_playback_init()
{
if (!recording_buffer) {
printf("Audio buffer not initialized");
return 0;
}
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_recording_callback(void* userdata, Uint8* stream, int len)
{
char string[64];
state* state = userdata;
int space_left = recording_buffer_size - recording_buffer_position;
if (space_left <= 0) {
sprintf(string, "Stopping recording ID: %i", state->recording_device_id);
log_message(LOG_INFO, string);
SDL_PauseAudioDevice(state->recording_device_id, 1);
return;
}
if (len > space_left) {
len = space_left;
}
memcpy(&recording_buffer[recording_buffer_position], stream, len);
recording_buffer_position += len;
sprintf(string, "Record pos: %u/%u (%u)", recording_buffer_position, recording_buffer_size, len);
log_message(LOG_INFO, string);
}
void audio_playback_callback(void* userdata, Uint8* stream, int len)
{
char string[64];
state* state = userdata;
int space_left = recording_buffer_size - recording_buffer_position;
if (space_left <= 0) {
sprintf(string, "Stopping playback ID: %i", state->recording_device_id);
log_message(LOG_INFO, string);
SDL_PauseAudioDevice(state->playback_device_id, 1);
return;
}
if (len > space_left) {
len = space_left;
}
memcpy(stream, &recording_buffer[recording_buffer_position], len);
recording_buffer_position += len;
sprintf(string, "Playback pos: %u/%u (%u)", recording_buffer_position, recording_buffer_size, len);
log_message(LOG_INFO, string);
}

7
makefile
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@ -21,8 +21,13 @@ $(OBJS): $(OBJD)/%.o: %.c
mkdir -p $(@D)
$(CC) $(CCFLAGS) -c $? -o $@
TARGET1 = test
$(TARGET1): example-test-code/audiotest.c
$(CC) $(CCFLAGS) $^ -o $(TARGET1) $(LDFLAGS)
clean:
rm -r $(TARGET) $(OBJD)
rm -r $(TARGET) $(TARGET1) $(test) $(OBJD)
run: $(TARGET)
./$(TARGET)

71
texture.c Normal file
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@ -0,0 +1,71 @@
#include "texture.h"
int text_texture_init(text_texture* text_texture, SDL_Renderer* renderer)
{
text_texture->texture = NULL;
text_texture->renderer = renderer;
text_texture->font = TTF_OpenFont("FiraCode-Regular.ttf", 24);
if (!text_texture->font) {
printf("Failed to load font! TTF_Error: %s\n", TTF_GetError());
return 0;
}
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(text_texture->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(text_texture->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(text_texture->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(text_texture->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;
}

20
texture.h Normal file
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@ -0,0 +1,20 @@
#ifndef TEXTURE_H
#define TEXTURE_H
#include <SDL2/SDL_ttf.h>
#include "SDL2/SDL.h"
typedef struct {
SDL_Texture* texture;
SDL_Renderer* renderer;
TTF_Font* font;
int width;
int height;
} text_texture;
int text_texture_init(text_texture* text_texture, SDL_Renderer* renderer);
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);
#endif