content: /*
   * Copyright (C) 2016 The Android Open Source Project
   *
   * 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.google.android.exoplayer2.util;
  
  import android.annotation.TargetApi;
  import com.google.android.exoplayer2.ExoPlayerLibraryInfo;
  
  /**
   * Calls through to {@link android.os.Trace} methods on supported API levels.
   */
  public final class TraceUtil {
  
    private TraceUtil() {}
  
    /**
     * Writes a trace message to indicate that a given section of code has begun.
     *
     * @see android.os.Trace#beginSection(String)
     * @param sectionName The name of the code section to appear in the trace. This may be at most 127
     *     Unicode code units long.
     */
    public static void beginSection(String sectionName) {
      if (ExoPlayerLibraryInfo.TRACE_ENABLED && Util.SDK_INT >= 18) {
        beginSectionV18(sectionName);
      }
    }
  
    /**
     * Writes a trace message to indicate that a given section of code has ended.
     *
     * @see android.os.Trace#endSection()
     */
    public static void endSection() {
      if (ExoPlayerLibraryInfo.TRACE_ENABLED && Util.SDK_INT >= 18) {
        endSectionV18();
      }
    }
  
    @TargetApi(18)
    private static void beginSectionV18(String sectionName) {
      android.os.Trace.beginSection(sectionName);
    }
  
    @TargetApi(18)
    private static void endSectionV18() {
      android.os.Trace.endSection();
    }
  
  }
  