/*
 * Copyright 2009 Phil Burk, Mobileer Inc
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.jsyn.engine;

import com.jsyn.JSyn;
import com.jsyn.Synthesizer;
import com.jsyn.devices.AudioDeviceFactory;
import com.jsyn.devices.AudioDeviceManager;
import com.jsyn.unitgen.LineIn;
import com.jsyn.unitgen.LineOut;
import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertEquals;

public class TestDevices {

    @Test
    public void testPassThrough() {
        Synthesizer synth;
        LineIn lineIn;
        LineOut lineOut;
        // Create a context for the synthesizer.
        synth = JSyn.createSynthesizer(AudioDeviceFactory.createAudioDeviceManager(true));
        // Add an audio input.
        synth.add(lineIn = new LineIn());
        // Add an audio output.
        synth.add(lineOut = new LineOut());
        // Connect the input to the output.
        lineIn.output.connect(0, lineOut.input, 0);
        lineIn.output.connect(1, lineOut.input, 1);

        // Both stereo.
        int numInputChannels = 2;
        int numOutputChannels = 2;
        synth.start(44100, AudioDeviceManager.USE_DEFAULT_DEVICE, numInputChannels,
                AudioDeviceManager.USE_DEFAULT_DEVICE, numOutputChannels);

        // We only need to start the LineOut. It will pull data from the LineIn.
        lineOut.start();
        System.out.println("Audio passthrough started.");
        // Sleep a while.
        double sleepTime = 2.0;
        double startTime = synth.getCurrentTime();
        try {
            // Sleep for a few seconds.
            synth.sleepUntil(startTime + sleepTime);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        double synthTime = synth.getCurrentTime();
        double actualSleepTime = synthTime - startTime;
        assertEquals(sleepTime, actualSleepTime, 0.1, "Time has advanced. " + actualSleepTime);
        // Stop everything.
        synth.stop();
        System.out.println("All done.");

    }
}