81 lines
1.6 KiB
C
81 lines
1.6 KiB
C
// ampler.c
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <SDL2/SDL.h>
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#include "ampler.h"
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#include "audio.c"
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#include "draw.c"
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Ampler_state *init() {
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Ampler_state *state = malloc(sizeof Ampler_state);
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SDL_memset(state, 0, sizeof Ampler_state);
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state -> size = sizeof Ampler_state;
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SDL_AudioSpec want = { 0 }, have = { 0 };
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want.freq = SAMPLE_RATE;
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want.format = AUDIO_S16;
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want.channels = CHANNELS;
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want.samples = 512;
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want.callback = NULL; // use que funcs
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want.userdata = NULL;
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state -> playdev = SDL_OpenAudioDevice(
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NULL, // default device
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0, // not capture
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&want,
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&have,
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0 // no changes allowed
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);
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if !(state -> playdev) do
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puts(SDL_GetError());
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// TODO: iterate a directory to load samples
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load_track(state);
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puts("init.");
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return state;
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}
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int ampler_main(SDL_Window *w, SDL_Renderer *r, Ampler_state **u_data) {
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if *u_data == NULL do *u_data = init();
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u32 old_size = (*u_data) -> size, new_size = sizeof Ampler_state;
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if old_size < new_size do {
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printf("increasing size. %i to %i\n", old_size, new_size);
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Ampler_state *nu = malloc(new_size);
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SDL_memset(nu, 0, new_size);
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SDL_memcpy(nu, *u_data, old_size);
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nu -> size = new_size;
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free(*u_data);
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*u_data = nu;
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}
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Ampler_state *state = *u_data;
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SDL_PauseAudioDevice(state -> playdev, 0); // unpause audio
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while 1 do {
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SDL_Event e;
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while SDL_PollEvent(&e) do
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if e.type == SDL_QUIT do
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return 1;
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audio_frame(state);
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draw_frame(w, r, state);
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SDL_Delay(1);
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if !remove("reload-trigger") do {
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SDL_PauseAudioDevice(state -> playdev, 1); // pause audio
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puts("removed reload-trigger, reloading...");
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return 0;
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}
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}
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}
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