xref: /packages/apps/Camera2/src/com/android/camera/stats/profiler/GuardingProfile.java

/*
 * Copyright (C) 2015 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.android.camera.stats.profiler;

/**
 * A guarding profile will only write messages to a writer if the
 * time exceeds a given threshold. For mark() calls, it uses the
 * time since last event, and for stop() calls it uses the total
 * elapsed duration of the profile.
 */
public class GuardingProfile extends ProfileBase {
    private final Writer mGuardWriter;
    private final Writer mVerboseWriter;
    private final int mMaxMillis;

    public GuardingProfile(Writer writer, Writer verbose, String name,int maxDuration) {
        super(name);
        mGuardWriter = writer;
        mVerboseWriter = verbose;
        mMaxMillis = maxDuration;
    }

    @Override
    protected void onStart() {
        mVerboseWriter.write(format(0, "GUARD", "START"));
    }

    @Override
    protected void onMark(double totalMillis, double lastMillis, String reason) {
        if (lastMillis > mMaxMillis) {
            mGuardWriter.write(format(totalMillis, "GUARD", lastMillis, reason));
        } else {
            mVerboseWriter.write(format(totalMillis, "GUARD", lastMillis, reason));
        }
    }

    @Override
    protected void onStop(double totalMillis, double lastMillis) {
        if (totalMillis > mMaxMillis) {
            mGuardWriter.write(format(totalMillis, "GUARD", "STOP"));
        } else {
            mVerboseWriter.write(format(totalMillis, "GUARD",  "STOP"));
        }
    }

    @Override
    protected void onStop(double totalMillis, double lastMillis, String reason) {
        onMark(totalMillis, lastMillis, reason);
        onStop(totalMillis, lastMillis);
    }
}