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// This file is part of the 64k demo project.
// It tests the MockAudioBackend implementation.
// Verifies event recording, time tracking, and synth integration.
#include "audio/mock_audio_backend.h"
#include "audio/audio.h"
#include "audio/synth.h"
#include <assert.h>
#include <stdio.h>
#include <cmath>
#if !defined(STRIP_ALL)
void test_event_recording() {
MockAudioBackend backend;
// Initially no events
assert(backend.get_events().size() == 0);
assert(backend.get_current_time() == 0.0f);
// Simulate voice trigger
backend.on_voice_triggered(0.5f, 3, 0.75f, -0.25f);
// Verify event recorded
const auto& events = backend.get_events();
assert(events.size() == 1);
assert(events[0].timestamp_sec == 0.5f);
assert(events[0].spectrogram_id == 3);
assert(events[0].volume == 0.75f);
assert(events[0].pan == -0.25f);
// Record multiple events
backend.on_voice_triggered(1.0f, 5, 1.0f, 0.0f);
backend.on_voice_triggered(1.5f, 3, 0.5f, 0.5f);
assert(backend.get_events().size() == 3);
assert(events[1].timestamp_sec == 1.0f);
assert(events[2].timestamp_sec == 1.5f);
// Clear events
backend.clear_events();
assert(backend.get_events().size() == 0);
printf("Event recording test PASSED\n");
}
void test_time_tracking() {
MockAudioBackend backend;
// Test manual time advance
assert(backend.get_current_time() == 0.0f);
backend.advance_time(0.5f);
assert(backend.get_current_time() == 0.5f);
backend.advance_time(1.0f);
assert(backend.get_current_time() == 1.5f);
// Test time setting
backend.set_time(10.0f);
assert(backend.get_current_time() == 10.0f);
printf("Time tracking test PASSED\n");
}
void test_frame_rendering() {
MockAudioBackend backend;
// Simulate frame rendering (32000 Hz sample rate)
// 1 second = 32000 frames
backend.on_frames_rendered(16000); // 0.5 seconds
assert(std::abs(backend.get_current_time() - 0.5f) < 0.001f);
backend.on_frames_rendered(16000); // Another 0.5 seconds
assert(std::abs(backend.get_current_time() - 1.0f) < 0.001f);
backend.on_frames_rendered(32000); // 1 second
assert(std::abs(backend.get_current_time() - 2.0f) < 0.001f);
printf("Frame rendering test PASSED\n");
}
void test_synth_integration() {
MockAudioBackend backend;
audio_set_backend(&backend);
synth_init();
// Create dummy spectrogram
float data[DCT_SIZE * 10] = {0};
data[0] = 100.0f; // DC component
Spectrogram spec = {data, data, 10};
int spec_id = synth_register_spectrogram(&spec);
assert(spec_id >= 0);
// Trigger voice - should be recorded at time 0
synth_trigger_voice(spec_id, 0.8f, -0.3f);
// Verify event recorded
const auto& events = backend.get_events();
assert(events.size() == 1);
assert(events[0].timestamp_sec == 0.0f); // Before any rendering
assert(events[0].spectrogram_id == spec_id);
assert(events[0].volume == 0.8f);
assert(events[0].pan == -0.3f);
// Render some frames to advance time
float output[1024] = {0};
synth_render(output, 512); // ~0.016 sec at 32kHz
// Verify synth updated its time
// (Note: synth time is internal, mock doesn't track it from render)
// Trigger another voice after rendering
synth_trigger_voice(spec_id, 1.0f, 0.5f);
assert(events.size() == 2);
// Second trigger should have timestamp > 0
assert(events[1].timestamp_sec > 0.0f);
assert(events[1].timestamp_sec < 0.02f); // ~512 frames = ~0.016 sec
printf("Synth integration test PASSED\n");
}
void test_multiple_voices() {
MockAudioBackend backend;
audio_set_backend(&backend);
synth_init();
// Create multiple spectrograms
float data1[DCT_SIZE * 5] = {0};
float data2[DCT_SIZE * 5] = {0};
float data3[DCT_SIZE * 5] = {0};
Spectrogram spec1 = {data1, data1, 5};
Spectrogram spec2 = {data2, data2, 5};
Spectrogram spec3 = {data3, data3, 5};
int id1 = synth_register_spectrogram(&spec1);
int id2 = synth_register_spectrogram(&spec2);
int id3 = synth_register_spectrogram(&spec3);
// Trigger multiple voices at once
synth_trigger_voice(id1, 1.0f, -1.0f);
synth_trigger_voice(id2, 0.5f, 0.0f);
synth_trigger_voice(id3, 0.75f, 1.0f);
// Verify all recorded
const auto& events = backend.get_events();
assert(events.size() == 3);
// Verify each has correct properties
assert(events[0].spectrogram_id == id1);
assert(events[1].spectrogram_id == id2);
assert(events[2].spectrogram_id == id3);
assert(events[0].volume == 1.0f);
assert(events[1].volume == 0.5f);
assert(events[2].volume == 0.75f);
assert(events[0].pan == -1.0f);
assert(events[1].pan == 0.0f);
assert(events[2].pan == 1.0f);
printf("Multiple voices test PASSED\n");
}
void test_audio_render_silent_integration() {
MockAudioBackend backend;
audio_set_backend(&backend);
audio_init();
synth_init();
// Create a spectrogram
float data[DCT_SIZE * 5] = {0};
Spectrogram spec = {data, data, 5};
int spec_id = synth_register_spectrogram(&spec);
// Trigger at t=0
synth_trigger_voice(spec_id, 1.0f, 0.0f);
// Simulate 2 seconds of silent rendering (seek/fast-forward)
audio_render_silent(2.0f);
// Verify backend time advanced via on_frames_rendered
const float expected_time = 2.0f;
const float actual_time = backend.get_current_time();
assert(std::abs(actual_time - expected_time) < 0.01f); // 10ms tolerance
audio_shutdown();
printf("audio_render_silent integration test PASSED\n");
}
#endif /* !defined(STRIP_ALL) */
int main() {
#if !defined(STRIP_ALL)
printf("Running MockAudioBackend tests...\n");
test_event_recording();
test_time_tracking();
test_frame_rendering();
test_synth_integration();
test_multiple_voices();
test_audio_render_silent_integration();
printf("All MockAudioBackend tests PASSED\n");
return 0;
#else
printf("MockAudioBackend tests skipped (STRIP_ALL enabled)\n");
return 0;
#endif /* !defined(STRIP_ALL) */
}
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