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#include "audio/synth.h"
#include <assert.h>
#include <math.h>
#include <stdio.h>
#include <string.h>
// A simple floating point comparison with a tolerance
bool is_close(float a, float b, float epsilon = 1e-6f) {
return fabsf(a - b) < epsilon;
}
void test_registration() {
synth_init();
printf("Running test: Registration...\n");
float spec_buf_a[DCT_SIZE], spec_buf_b[DCT_SIZE];
Spectrogram spec = {spec_buf_a, spec_buf_b, 1};
// Fill up all slots
for (int i = 0; i < MAX_SPECTROGRAMS; ++i) {
int id = synth_register_spectrogram(&spec);
assert(id == i);
}
// Next one should fail
int fail_id = synth_register_spectrogram(&spec);
assert(fail_id == -1);
// Unregister one
synth_unregister_spectrogram(5);
// Now we should be able to register again in the freed slot
int new_id = synth_register_spectrogram(&spec);
assert(new_id == 5);
printf("...Registration test PASSED.\n");
}
void test_render() {
synth_init();
printf("Running test: Render...\n");
float spec_buf_a[DCT_SIZE] = {0};
Spectrogram spec = {spec_buf_a, nullptr, 1};
// Create a simple spectrum with one active bin
spec_buf_a[10] = 1.0f;
int id = synth_register_spectrogram(&spec);
assert(id != -1);
synth_trigger_voice(id, 1.0f, 0.0f);
float output_buffer[DCT_SIZE * 2] = {0}; // Stereo
synth_render(output_buffer, DCT_SIZE);
float total_energy = 0.0f;
for (int i = 0; i < DCT_SIZE * 2; ++i) {
total_energy += fabsf(output_buffer[i]);
}
// If we rendered a sound, the buffer should not be silent
assert(total_energy > 0.01f);
printf("...Render test PASSED.\n");
}
void test_update() {
synth_init();
printf("Running test: Update...\n");
float spec_buf_a[DCT_SIZE] = {0};
float spec_buf_b[DCT_SIZE] = {0};
Spectrogram spec = {spec_buf_a, spec_buf_b, 1};
spec_buf_a[10] = 1.0f; // Original sound
spec_buf_b[20] = 1.0f; // Updated sound
int id = synth_register_spectrogram(&spec);
// Begin update - should get back buffer B
float *back_buffer = synth_begin_update(id);
assert(back_buffer == spec_buf_b);
// We could modify it here, but it's already different.
// Let's just commit.
synth_commit_update(id);
// Now if we trigger a voice, it should play from buffer B.
// To test this, we'd need to analyze the output, which is complex.
// For this test, we'll just ensure the mechanism runs and we can
// begin an update on the *new* back buffer (A).
back_buffer = synth_begin_update(id);
assert(back_buffer == spec_buf_a);
printf("...Update test PASSED.\n");
}
int main() {
test_registration();
test_render();
test_update();
synth_shutdown();
printf("\nAll synth tests passed!\n");
return 0;
}
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