package com.google.android.exoplayer2;

import android.os.Build;
import java.util.HashSet;

/* loaded from: classes2.dex */
public abstract class ExoPlayerLibraryInfo {
    public static final String DEFAULT_USER_AGENT;
    public static final HashSet registeredModules;
    public static String registeredModulesString;

    static {
        String str = Build.VERSION.RELEASE;
        StringBuilder sb = new StringBuilder(String.valueOf(str).length() + 57);
        sb.append("ExoPlayerLib/2.15.1 (Linux; Android ");
        sb.append(str);
        sb.append(") ");
        sb.append("ExoPlayerLib/2.15.1");
        DEFAULT_USER_AGENT = sb.toString();
        registeredModules = new HashSet();
        registeredModulesString = "goog.exo.core";
    }

    public static synchronized void registerModule(String str) {
        synchronized (ExoPlayerLibraryInfo.class) {
            if (registeredModules.add(str)) {
                String str2 = registeredModulesString;
                StringBuilder sb = new StringBuilder(String.valueOf(str2).length() + 2 + String.valueOf(str).length());
                sb.append(str2);
                sb.append(", ");
                sb.append(str);
                registeredModulesString = sb.toString();
            }
        }
    }
}