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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 *

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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

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 */

/* @test

 @summary Test SoftLowFrequencyOscillator processControlLogic method */

import com.sun.media.sound.AudioSynthesizerPropertyInfo;

import com.sun.media.sound.SoftLowFrequencyOscillator;

import com.sun.media.sound.SoftSynthesizer;

public class TestProcessControlLogic {

    private static float control_rate = 147f;

    private static SoftSynthesizer synth = new SoftSynthesizer();

    private static SoftLowFrequencyOscillator lfo = new SoftLowFrequencyOscillator();

    private static void testLFO(boolean shared, int instance, float freq, float delay,

            float delay2) throws Exception {

        SoftLowFrequencyOscillator lfo =

            shared?TestProcessControlLogic.lfo:new SoftLowFrequencyOscillator();

        lfo.reset();

        double[] lfo_freq = lfo.get(instance, "freq");

        double[] lfo_delay = lfo.get(instance, "delay");

        double[] lfo_delay2 = lfo.get(instance, "delay2");

        double[] lfo_output = lfo.get(instance, null);

        lfo_freq[0] = freq;

        lfo_delay[0] = delay;

        lfo_delay2[0] = delay2;

        lfo.init(synth);

        // For delayCount amount time, the output LFO should be 0.5

        int delayCount = (int) ((Math.pow(2, delay / 1200.0) * control_rate));

        delayCount += (int) ((delay2 * control_rate) / 1000.0);

        for (int i = 0; i < delayCount; i++) {

            if (Math.abs(0.5 - lfo_output[0]) > 0.000001)

                throw new Exception("Incorrect LFO output ("

                        +"0.5 != "+lfo_output[0]+")!");

            lfo.processControlLogic();

        }

        // After the delay the LFO should start oscillate

        // Let make sure output is accurate enough

        double p_step = (440.0 / control_rate)

        * Math.exp((freq - 6900.0) * (Math.log(2) / 1200.0));

        double p = 0;

        for (int i = 0; i < 30; i++) {

            p += p_step;

            double predicted_output = 0.5 + Math.sin(p * 2 * Math.PI) * 0.5;

            if (Math.abs(predicted_output - lfo_output[0]) > 0.001)

                throw new Exception("Incorrect LFO output ("

                        +predicted_output+" != "+lfo_output[0]+")!");

            lfo.processControlLogic();

        }

    }

    public static void main(String[] args) throws Exception {

        // Get default control rate from synthesizer

        AudioSynthesizerPropertyInfo[] p = synth.getPropertyInfo(null);

        for (int i = 0; i < p.length; i++) {

            if (p[i].name.equals("control rate")) {

                control_rate = ((Float) p[i].value).floatValue();

                break;

            }

        }

        // Test LFO under various configurations

        for (int instance = 0; instance < 3; instance++)

            for (int d1 = -3000; d1 < 0; d1 += 1000)

                for (int d2 = 0; d2 < 5000; d2 += 1000)

                    for (int fr = -1000; fr < 1000; fr += 100) {

                        testLFO(true, instance,

                                (fr == -1000) ? Float.NEGATIVE_INFINITY : fr,

                                (d1 == -3000) ? Float.NEGATIVE_INFINITY : d1,

                                d2);

                        testLFO(false, instance,

                                (fr == -1000) ? Float.NEGATIVE_INFINITY : fr,

                                (d1 == -3000) ? Float.NEGATIVE_INFINITY : d1,

                                d2);

                    }

    }

}