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Author SHA1 Message Date
Sheldon Lee
19cb656254 Remove example test code 2024-11-08 22:49:22 +08:00
Sheldon Lee
1d30dba681 Refactor texture code + start splitting networking into threads. 2024-11-08 22:46:33 +08:00
9 changed files with 121 additions and 984 deletions
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1
example-test-code/README.md
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Some code here is from ChatGPT

171
example-test-code/audiotest.c
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#include <SDL2/SDL.h>
#include <SDL2/SDL_audio.h>
#include <stdio.h>
/*
* Audio INFO: audio related declarations and callback here.
*/
const int MAX_RECORDING_SECONDS = 2;
const int RECORDING_BUFFER_SECONDS = MAX_RECORDING_SECONDS + 1;
int num_devices = 0;
int num_recdevices = 0;
int num_playdevices = 0;
//Recording data buffer
Uint8* gRecordingBuffer = NULL;
//Size of data buffer
Uint32 gBufferByteSize = 0;
//Position in data buffer
Uint32 gBufferBytePosition = 0;
void audioRecordingCallback(void* userdata, Uint8* stream, int len )
{
memcpy(&gRecordingBuffer[ gBufferBytePosition ], stream, len);
gBufferBytePosition += len;
printf("Recording Callback: %u\n", *stream);
}
void audioPlaybackCallback(void* userdata, Uint8* stream, int len )
{
memcpy(stream, &gRecordingBuffer[ gBufferBytePosition ], len);
gBufferBytePosition += len;
printf("Playback Callback: %u\n", *stream);
}
int main(int argc, char* argv[])
{
if (SDL_Init(SDL_INIT_AUDIO) < 0) {
printf("SDL init failed: %s\n", SDL_GetError());
return 1;
}
printf("SDL init success: %s\n", SDL_GetError());
while (1) {
int go = 0;
while (!go) {
printf("q to quit, Enter to continue\n");
char ch = getchar();
switch (ch) {
case 'q':
goto end;
break;
case '\n':
go = 1;
break;
}
}
SDL_AudioDeviceID recordingDeviceId = 0;
SDL_AudioDeviceID playbackDeviceId = 0;
SDL_AudioSpec gReceivedRecordingSpec;
SDL_AudioSpec gReceivedPlaybackSpec;
SDL_AudioSpec desiredRecordingSpec;
SDL_zero(desiredRecordingSpec);
desiredRecordingSpec.freq = 44100;
desiredRecordingSpec.format = AUDIO_S16;
desiredRecordingSpec.channels = 2;
desiredRecordingSpec.samples = 4096;
desiredRecordingSpec.callback = audioRecordingCallback;
SDL_AudioSpec desiredPlaybackSpec;
SDL_zero(desiredPlaybackSpec);
desiredPlaybackSpec.freq = 44100;
desiredPlaybackSpec.format = AUDIO_S16; // AUDIO_F32;
desiredPlaybackSpec.channels = 2;
desiredPlaybackSpec.samples = 4096;
desiredPlaybackSpec.callback = audioPlaybackCallback;
//Maximum position in data buffer for recording
Uint32 gBufferByteMaxPosition = 0;
printf("Audio Driver: %s\n", SDL_GetCurrentAudioDriver());
num_recdevices = SDL_GetNumAudioDevices(1);
if(num_recdevices < 1) {
printf( "Unable to get audio capture device! SDL Error: %s\n", SDL_GetError() );
return 0;
}
printf("Num audio recording devices: %i\n", num_recdevices);
for(int i = 0; i < num_recdevices; ++i) {
const char* deviceName = SDL_GetAudioDeviceName(i, 1);
printf("REC: %d - %s\n", i, deviceName);
}
num_playdevices = SDL_GetNumAudioDevices(0);
if(num_playdevices < 1) {
printf( "Unable to get audio playback device! SDL Error: %s\n", SDL_GetError() );
return 0;
}
printf("Num audio playback devices: %i\n", num_playdevices);
for(int i = 0; i < num_recdevices; ++i) {
const char* deviceName = SDL_GetAudioDeviceName(i, 0);
printf("PBK: %d - %s\n", i, deviceName);
}
const char* device_name = SDL_GetAudioDeviceName(2, 1);
recordingDeviceId = SDL_OpenAudioDevice(device_name, SDL_TRUE, &desiredRecordingSpec, &gReceivedRecordingSpec, SDL_AUDIO_ALLOW_FORMAT_CHANGE);
if(recordingDeviceId == 0) {
printf("Failed to open recording device! SDL Error: %s", SDL_GetError() );
return 1;
}
int bytesPerSample = gReceivedRecordingSpec.channels * (SDL_AUDIO_BITSIZE(gReceivedRecordingSpec.format) / 8);
int bytesPerSecond = gReceivedRecordingSpec.freq * bytesPerSample;
gBufferByteSize = RECORDING_BUFFER_SECONDS * bytesPerSecond;
gBufferByteMaxPosition = MAX_RECORDING_SECONDS * bytesPerSecond;
printf("bytesPerSample %d, bytesPerSecond %d\n", bytesPerSample,bytesPerSecond);
printf("gBufferByteSize %d, gBufferByteMaxPosition %d\n", gBufferByteSize,gBufferByteMaxPosition);
playbackDeviceId = SDL_OpenAudioDevice( NULL, 0, &desiredPlaybackSpec, &gReceivedPlaybackSpec, SDL_AUDIO_ALLOW_FORMAT_CHANGE );
if(playbackDeviceId == 0) {
printf("Failed to open playback device! SDL Error: %s", SDL_GetError());
return 1;
}
gRecordingBuffer = malloc(gBufferByteSize);
memset(gRecordingBuffer, 0, gBufferByteSize);
gBufferBytePosition = 0;
SDL_Delay(100);
SDL_PauseAudioDevice( recordingDeviceId, SDL_FALSE );
while(1) {
SDL_LockAudioDevice( recordingDeviceId );
if(gBufferBytePosition > gBufferByteMaxPosition) {
printf("end\n");
SDL_UnlockAudioDevice( recordingDeviceId );
SDL_PauseAudioDevice( recordingDeviceId, SDL_TRUE );
break;
//} else {
// printf("bufferPos %d\n",gBufferBytePosition);
}
SDL_UnlockAudioDevice( recordingDeviceId );
}
printf("playback\n");
gBufferBytePosition = 0;
SDL_PauseAudioDevice(playbackDeviceId, 0);
while(1) {
SDL_LockAudioDevice(playbackDeviceId);
if(gBufferBytePosition > gBufferByteMaxPosition) {
printf("end\n");
SDL_UnlockAudioDevice(playbackDeviceId);
SDL_PauseAudioDevice(playbackDeviceId, SDL_TRUE);
break;
}
SDL_UnlockAudioDevice(playbackDeviceId);
}
printf("Cleanup\n");
free(gRecordingBuffer);
SDL_CloseAudioDevice(recordingDeviceId);
SDL_CloseAudioDevice(playbackDeviceId);
}
end:
return 0;
}

517
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);
}

64
example-test-code/main.c.bak1
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#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;
}

98
example-test-code/main.c.bak2
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#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;
}

85
example-test-code/temp.cpp
View File

@ -1,85 +0,0 @@
#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;
}

116
main.c
View File

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

40
texture.c
View File

@ -1,11 +1,11 @@
#include "texture.h" #include "texture.h"
#include "log.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->texture = NULL;
text_texture->renderer = renderer; 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) { if (!text_texture->font) {
log_message(LOG_ERROR, "Failed to load font! TTF_Error: %s", TTF_GetError()); log_message(LOG_ERROR, "Failed to load font! TTF_Error: %s", TTF_GetError());
return 0; return 0;
@ -23,6 +23,7 @@ int text_texture_load(text_texture* text_texture, char* string)
} }
SDL_Color text_color = { 255, 255, 255 }; 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); SDL_Surface* text_surface = TTF_RenderText_Solid(text_texture->font, string, text_color);
if (!text_surface) { if (!text_surface) {
log_message(LOG_ERROR, "Unable to render text surface! TTF_Error: %s", TTF_GetError()); 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; return 0;
} }
text_texture->texture = SDL_CreateTextureFromSurface(text_texture->renderer, text_surface); text_texture->texture = texture;
text_texture->width = text_surface->w; text_texture->width = text_surface->w;
text_texture->height = text_surface->h; text_texture->height = text_surface->h;
@ -62,11 +63,42 @@ int text_texture_render(text_texture* text_texture, int x, int y)
return 1; return 1;
} }
int text_texture_free(text_texture* text_texture) int text_texture_destroy(text_texture* text_texture)
{ {
if (!text_texture->texture) { if (!text_texture->texture) {
return 0; return 0;
} }
SDL_DestroyTexture(text_texture->texture); 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; return 1;
} }

13
texture.h
View File

@ -12,9 +12,18 @@ typedef struct {
int height; int height;
} text_texture; } 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_load(text_texture* text_texture, char* string);
int text_texture_render(text_texture* text_texture, int x, int y); 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 #endif