Java example source code file (SoftMixingMainMixer.java)

This example Java source code file (SoftMixingMainMixer.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

arraylist, audioinputstream, channel_channelmixer_left, channel_effect1, channel_effect3, channel_effect4, channel_left, channel_right, channel_right_dry, softaudiobuffer, softaudioprocessor, softchorus, softmixingdataline, softmixingmainmixer, util

The SoftMixingMainMixer.java Java example source code

/*
 * Copyright (c) 2008, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * 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.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
package com.sun.media.sound;

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;

import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;

/**
 * Main mixer for SoftMixingMixer.
 *
 * @author Karl Helgason
 */
public final class SoftMixingMainMixer {

    public final static int CHANNEL_LEFT = 0;

    public final static int CHANNEL_RIGHT = 1;

    public final static int CHANNEL_EFFECT1 = 2;

    public final static int CHANNEL_EFFECT2 = 3;

    public final static int CHANNEL_EFFECT3 = 4;

    public final static int CHANNEL_EFFECT4 = 5;

    public final static int CHANNEL_LEFT_DRY = 10;

    public final static int CHANNEL_RIGHT_DRY = 11;

    public final static int CHANNEL_SCRATCH1 = 12;

    public final static int CHANNEL_SCRATCH2 = 13;

    public final static int CHANNEL_CHANNELMIXER_LEFT = 14;

    public final static int CHANNEL_CHANNELMIXER_RIGHT = 15;

    private final SoftMixingMixer mixer;

    private final AudioInputStream ais;

    private final SoftAudioBuffer[] buffers;

    private final SoftAudioProcessor reverb;

    private final SoftAudioProcessor chorus;

    private final SoftAudioProcessor agc;

    private final int nrofchannels;

    private final Object control_mutex;

    private final List<SoftMixingDataLine> openLinesList = new ArrayList();

    private SoftMixingDataLine[] openLines = new SoftMixingDataLine[0];

    public AudioInputStream getInputStream() {
        return ais;
    }

    void processAudioBuffers() {
        for (int i = 0; i < buffers.length; i++) {
            buffers[i].clear();
        }

        SoftMixingDataLine[] openLines;
        synchronized (control_mutex) {
            openLines = this.openLines;
            for (int i = 0; i < openLines.length; i++) {
                openLines[i].processControlLogic();
            }
            chorus.processControlLogic();
            reverb.processControlLogic();
            agc.processControlLogic();
        }
        for (int i = 0; i < openLines.length; i++) {
            openLines[i].processAudioLogic(buffers);
        }

        chorus.processAudio();
        reverb.processAudio();

        agc.processAudio();

    }

    public SoftMixingMainMixer(SoftMixingMixer mixer) {
        this.mixer = mixer;

        nrofchannels = mixer.getFormat().getChannels();

        int buffersize = (int) (mixer.getFormat().getSampleRate() / mixer
                .getControlRate());

        control_mutex = mixer.control_mutex;
        buffers = new SoftAudioBuffer[16];
        for (int i = 0; i < buffers.length; i++) {
            buffers[i] = new SoftAudioBuffer(buffersize, mixer.getFormat());

        }

        reverb = new SoftReverb();
        chorus = new SoftChorus();
        agc = new SoftLimiter();

        float samplerate = mixer.getFormat().getSampleRate();
        float controlrate = mixer.getControlRate();
        reverb.init(samplerate, controlrate);
        chorus.init(samplerate, controlrate);
        agc.init(samplerate, controlrate);

        reverb.setMixMode(true);
        chorus.setMixMode(true);
        agc.setMixMode(false);

        chorus.setInput(0, buffers[CHANNEL_EFFECT2]);
        chorus.setOutput(0, buffers[CHANNEL_LEFT]);
        if (nrofchannels != 1)
            chorus.setOutput(1, buffers[CHANNEL_RIGHT]);
        chorus.setOutput(2, buffers[CHANNEL_EFFECT1]);

        reverb.setInput(0, buffers[CHANNEL_EFFECT1]);
        reverb.setOutput(0, buffers[CHANNEL_LEFT]);
        if (nrofchannels != 1)
            reverb.setOutput(1, buffers[CHANNEL_RIGHT]);

        agc.setInput(0, buffers[CHANNEL_LEFT]);
        if (nrofchannels != 1)
            agc.setInput(1, buffers[CHANNEL_RIGHT]);
        agc.setOutput(0, buffers[CHANNEL_LEFT]);
        if (nrofchannels != 1)
            agc.setOutput(1, buffers[CHANNEL_RIGHT]);

        InputStream in = new InputStream() {

            private final SoftAudioBuffer[] buffers = SoftMixingMainMixer.this.buffers;

            private final int nrofchannels = SoftMixingMainMixer.this.mixer
                    .getFormat().getChannels();

            private final int buffersize = buffers[0].getSize();

            private final byte[] bbuffer = new byte[buffersize
                    * (SoftMixingMainMixer.this.mixer.getFormat()
                            .getSampleSizeInBits() / 8) * nrofchannels];

            private int bbuffer_pos = 0;

            private final byte[] single = new byte[1];

            public void fillBuffer() {
                processAudioBuffers();
                for (int i = 0; i < nrofchannels; i++)
                    buffers[i].get(bbuffer, i);
                bbuffer_pos = 0;
            }

            public int read(byte[] b, int off, int len) {
                int bbuffer_len = bbuffer.length;
                int offlen = off + len;
                byte[] bbuffer = this.bbuffer;
                while (off < offlen)
                    if (available() == 0)
                        fillBuffer();
                    else {
                        int bbuffer_pos = this.bbuffer_pos;
                        while (off < offlen && bbuffer_pos < bbuffer_len)
                            b[off++] = bbuffer[bbuffer_pos++];
                        this.bbuffer_pos = bbuffer_pos;
                    }
                return len;
            }

            public int read() throws IOException {
                int ret = read(single);
                if (ret == -1)
                    return -1;
                return single[0] & 0xFF;
            }

            public int available() {
                return bbuffer.length - bbuffer_pos;
            }

            public void close() {
                SoftMixingMainMixer.this.mixer.close();
            }

        };

        ais = new AudioInputStream(in, mixer.getFormat(),
                AudioSystem.NOT_SPECIFIED);

    }

    public void openLine(SoftMixingDataLine line) {
        synchronized (control_mutex) {
            openLinesList.add(line);
            openLines = openLinesList
                    .toArray(new SoftMixingDataLine[openLinesList.size()]);
        }
    }

    public void closeLine(SoftMixingDataLine line) {
        synchronized (control_mutex) {
            openLinesList.remove(line);
            openLines = openLinesList
                    .toArray(new SoftMixingDataLine[openLinesList.size()]);
            if (openLines.length == 0)
                if (mixer.implicitOpen)
                    mixer.close();
        }

    }

    public SoftMixingDataLine[] getOpenLines() {
        synchronized (control_mutex) {
            return openLines;
        }

    }

    public void close() {
        SoftMixingDataLine[] openLines = this.openLines;
        for (int i = 0; i < openLines.length; i++) {
            openLines[i].close();
        }
    }

}