minecraft_25w45a_unobfuscated/com/mojang/blaze3d/audio/Channel.java

/*
 * Decompiled with CFR 0.152.
 * 
 * Could not load the following classes:
 *  com.mojang.logging.LogUtils
 *  org.jspecify.annotations.Nullable
 *  org.lwjgl.openal.AL10
 *  org.slf4j.Logger
 */
package com.mojang.blaze3d.audio;

import com.mojang.blaze3d.audio.OpenAlUtil;
import com.mojang.blaze3d.audio.SoundBuffer;
import com.mojang.logging.LogUtils;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.concurrent.atomic.AtomicBoolean;
import javax.sound.sampled.AudioFormat;
import net.minecraft.client.sounds.AudioStream;
import net.minecraft.world.phys.Vec3;
import org.jspecify.annotations.Nullable;
import org.lwjgl.openal.AL10;
import org.slf4j.Logger;

public class Channel {
    private static final Logger LOGGER = LogUtils.getLogger();
    private static final int QUEUED_BUFFER_COUNT = 4;
    public static final int BUFFER_DURATION_SECONDS = 1;
    private final int source;
    private final AtomicBoolean initialized = new AtomicBoolean(true);
    private int streamingBufferSize = 16384;
    private @Nullable AudioStream stream;

    static @Nullable Channel create() {
        int[] newId = new int[1];
        AL10.alGenSources((int[])newId);
        if (OpenAlUtil.checkALError("Allocate new source")) {
            return null;
        }
        return new Channel(newId[0]);
    }

    private Channel(int src) {
        this.source = src;
    }

    public void destroy() {
        if (this.initialized.compareAndSet(true, false)) {
            AL10.alSourceStop((int)this.source);
            OpenAlUtil.checkALError("Stop");
            if (this.stream != null) {
                try {
                    this.stream.close();
                }
                catch (IOException e) {
                    LOGGER.error("Failed to close audio stream", (Throwable)e);
                }
                this.removeProcessedBuffers();
                this.stream = null;
            }
            AL10.alDeleteSources((int[])new int[]{this.source});
            OpenAlUtil.checkALError("Cleanup");
        }
    }

    public void play() {
        AL10.alSourcePlay((int)this.source);
    }

    private int getState() {
        if (!this.initialized.get()) {
            return 4116;
        }
        return AL10.alGetSourcei((int)this.source, (int)4112);
    }

    public void pause() {
        if (this.getState() == 4114) {
            AL10.alSourcePause((int)this.source);
        }
    }

    public void unpause() {
        if (this.getState() == 4115) {
            AL10.alSourcePlay((int)this.source);
        }
    }

    public void stop() {
        if (this.initialized.get()) {
            AL10.alSourceStop((int)this.source);
            OpenAlUtil.checkALError("Stop");
        }
    }

    public boolean playing() {
        return this.getState() == 4114;
    }

    public boolean stopped() {
        return this.getState() == 4116;
    }

    public void setSelfPosition(Vec3 newPosition) {
        AL10.alSourcefv((int)this.source, (int)4100, (float[])new float[]{(float)newPosition.x, (float)newPosition.y, (float)newPosition.z});
    }

    public void setPitch(float pitch) {
        AL10.alSourcef((int)this.source, (int)4099, (float)pitch);
    }

    public void setLooping(boolean looping) {
        AL10.alSourcei((int)this.source, (int)4103, (int)(looping ? 1 : 0));
    }

    public void setVolume(float volume) {
        AL10.alSourcef((int)this.source, (int)4106, (float)volume);
    }

    public void disableAttenuation() {
        AL10.alSourcei((int)this.source, (int)53248, (int)0);
    }

    public void linearAttenuation(float maxDistance) {
        AL10.alSourcei((int)this.source, (int)53248, (int)53251);
        AL10.alSourcef((int)this.source, (int)4131, (float)maxDistance);
        AL10.alSourcef((int)this.source, (int)4129, (float)1.0f);
        AL10.alSourcef((int)this.source, (int)4128, (float)0.0f);
    }

    public void setRelative(boolean relative) {
        AL10.alSourcei((int)this.source, (int)514, (int)(relative ? 1 : 0));
    }

    public void attachStaticBuffer(SoundBuffer buffer) {
        buffer.getAlBuffer().ifPresent(bufferId -> AL10.alSourcei((int)this.source, (int)4105, (int)bufferId));
    }

    public void attachBufferStream(AudioStream stream) {
        this.stream = stream;
        AudioFormat format = stream.getFormat();
        this.streamingBufferSize = Channel.calculateBufferSize(format, 1);
        this.pumpBuffers(4);
    }

    private static int calculateBufferSize(AudioFormat format, int seconds) {
        return (int)((float)(seconds * format.getSampleSizeInBits()) / 8.0f * (float)format.getChannels() * format.getSampleRate());
    }

    private void pumpBuffers(int size) {
        if (this.stream != null) {
            try {
                for (int i = 0; i < size; ++i) {
                    ByteBuffer buffer = this.stream.read(this.streamingBufferSize);
                    if (buffer == null) continue;
                    new SoundBuffer(buffer, this.stream.getFormat()).releaseAlBuffer().ifPresent(bufferId -> AL10.alSourceQueueBuffers((int)this.source, (int[])new int[]{bufferId}));
                }
            }
            catch (IOException e) {
                LOGGER.error("Failed to read from audio stream", (Throwable)e);
            }
        }
    }

    public void updateStream() {
        if (this.stream != null) {
            int processedBuffers = this.removeProcessedBuffers();
            this.pumpBuffers(processedBuffers);
        }
    }

    private int removeProcessedBuffers() {
        int processed = AL10.alGetSourcei((int)this.source, (int)4118);
        if (processed > 0) {
            int[] ids = new int[processed];
            AL10.alSourceUnqueueBuffers((int)this.source, (int[])ids);
            OpenAlUtil.checkALError("Unqueue buffers");
            AL10.alDeleteBuffers((int[])ids);
            OpenAlUtil.checkALError("Remove processed buffers");
        }
        return processed;
    }
}