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#define SDL_MAIN_HANDLED
#include <SDL2/SDL.h>
#include <stdbool.h>
#include <stdlib.h>
#include <stdio.h>
#include "include.h"
#include "common/common.h"
#define eprintf(...) fprintf(stderr, __VA_ARGS__)
static const int WINDOW_WIDTH = 160, WINDOW_HEIGHT = 90;
SDL_Window *window = NULL;
int paused = 0;
struct blob load_file(char const *const name);
struct userdata userdata = {
.callback = NULL,
.user = NULL,
};
void audio_callback(void *userdata_void, unsigned char *stream_void, int const length) {
struct userdata *user = userdata_void;
float *stream = (float *) stream_void;
if (user->callback == NULL) {
for (int i = 0; i < length / sizeof (float); i++) {
stream[i] = 0.0;
}
} else {
user->callback(user->user, stream_void, length);
}
}
int (*file_ext(char *file))(struct blob *, struct userdata *);
int main(int argc, char **argv) {
if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO)) {
eprintf("failed to init SDL: %s\n");
return EXIT_FAILURE;
}
SDL_StopTextInput();
if ((window = SDL_CreateWindow("mu-sdl", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, WINDOW_WIDTH, WINDOW_HEIGHT, SDL_WINDOW_RESIZABLE | SDL_WINDOW_HIDDEN)) == NULL) {
eprintf("failed to create a window: %s\n");
SDL_Quit();
return EXIT_FAILURE;
}
SDL_Renderer *renderer;
if ((renderer = SDL_CreateRenderer(window, -1, 0)) == NULL) {
eprintf("failed to create a renderer: %s\n");
SDL_DestroyWindow(window);
SDL_Quit();
return EXIT_FAILURE;
}
SDL_ShowWindow(window);
SDL_SetRenderDrawColor(renderer, 0, 0, 0, SDL_ALPHA_OPAQUE);
SDL_RenderClear(renderer);
SDL_RenderPresent(renderer);
SDL_AudioSpec desired = {
.freq = SAMPLE_RATE,
.format = AUDIO_F32SYS,
.channels = OUT_CHANNELS,
.samples = 8096,
.callback = audio_callback,
.userdata = &userdata,
};
SDL_AudioDeviceID audio = SDL_OpenAudioDevice(NULL, 0, &desired, NULL, 0);
if (argc == 2) {
int (*module_func)(struct blob *, struct userdata *) = file_ext(argv[1]);
if (module_func == NULL) {
eprintf("%s: unrecognized file extension\n", argv[1]);
goto arg_load_done;
}
struct blob file = load_file(argv[1]);
if (file.data == NULL) {
perror(argv[1]);
goto arg_load_done;
}
module_func(&file, &userdata);
}
arg_load_done:
SDL_PauseAudioDevice(audio, 0);
while (true) {
SDL_Event evt;
while (SDL_PollEvent(&evt)) {
switch (evt.type) {
case SDL_QUIT:
goto done;
case SDL_WINDOWEVENT:
SDL_RenderClear(renderer);
SDL_RenderPresent(renderer);
break;
case SDL_KEYDOWN:
// ^Q
if (evt.key.keysym.sym == SDLK_q && evt.key.keysym.mod & KMOD_CTRL) {
goto done;
}
// ESC
if (evt.key.keysym.sym == SDLK_ESCAPE) {
goto done;
}
if (evt.key.keysym.sym == SDLK_SPACE) {
paused = !paused;
SDL_PauseAudioDevice(audio, paused);
}
break;
case SDL_DROPFILE:
puts(evt.drop.file);
struct blob file = load_file(evt.drop.file);
if (file.data == NULL) {
perror(evt.drop.file);
SDL_free(evt.drop.file);
break;
}
struct userdata newuser = {.callback = NULL, .freefunc = NULL};
int (*module_func)(struct blob *, struct userdata *) = file_ext(evt.drop.file);
if (module_func == NULL) {
eprintf("%s: unrecognized file extension\n", evt.drop.file);
free(file.data);
break;
}
SDL_free(evt.drop.file);
if (module_func(&file, &newuser)) {
// error
} else {
SDL_LockAudioDevice(audio);
if (userdata.freefunc != NULL) {
userdata.freefunc(userdata.user);
}
userdata = newuser;
SDL_UnlockAudioDevice(audio);
}
free(file.data);
break;
default:
}
}
}
done:
if (userdata.freefunc != NULL) {
SDL_LockAudioDevice(audio);
userdata.freefunc(userdata.user);
SDL_PauseAudioDevice(audio, 1);
SDL_UnlockAudioDevice(audio);
}
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(window);
SDL_CloseAudioDevice(audio);
SDL_Quit();
return EXIT_SUCCESS;
}
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