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// This file is part of the 64k demo project.
// It manages the low-level audio device and high-level audio state.
// Implementation uses miniaudio for cross-platform support.
#include "audio.h"
#ifndef DEMO_BUILD_TOOLS
#define MA_NO_FLAC
#define MA_NO_ENCODING
#define MA_NO_MP3
#define MA_NO_WAV
#endif
#define MINIAUDIO_IMPLEMENTATION
#include "miniaudio.h"
#include "synth.h"
#include <stdio.h>
static ma_device g_device;
void audio_data_callback(ma_device *pDevice, void *pOutput, const void *pInput,
ma_uint32 frameCount) {
(void)pInput;
float *fOutput = (float *)pOutput;
synth_render(fOutput, (int)frameCount);
}
void audio_init() {
synth_init();
ma_device_config config = ma_device_config_init(ma_device_type_playback);
config.playback.format = ma_format_f32;
config.playback.channels = 2;
config.sampleRate = 32000;
config.dataCallback = audio_data_callback;
if (ma_device_init(NULL, &config, &g_device) != MA_SUCCESS) {
printf("Failed to open playback device.\n");
return;
}
}
void audio_start() {
if (ma_device_start(&g_device) != MA_SUCCESS) {
printf("Failed to start playback device.\n");
ma_device_uninit(&g_device);
return;
}
}
#ifndef STRIP_ALL
void audio_render_silent(float duration_sec) {
const int sample_rate = 32000;
const int chunk_size = 512;
int total_frames = (int)(duration_sec * sample_rate);
float buffer[chunk_size * 2]; // Stereo
while (total_frames > 0) {
int frames_to_render =
(total_frames > chunk_size) ? chunk_size : total_frames;
synth_render(buffer, frames_to_render);
total_frames -= frames_to_render;
}
}
#endif
void audio_update() {
}
void audio_shutdown() {
ma_device_stop(&g_device);
ma_device_uninit(&g_device);
synth_shutdown();
}
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