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/*
* 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.tv.tuner.exoplayer.ac3;
import android.os.SystemClock;
import android.util.Log;
import android.util.Pair;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Set;
/**
* Monitors the rendering position of {@link AudioTrack}.
*/
public class AudioTrackMonitor {
private static final String TAG = "AudioTrackMonitor";
private static final boolean DEBUG = false;
// For fetched audio samples
private final ArrayList<Pair<Long, Integer>> mPtsList = new ArrayList<>();
private final Set<Integer> mSampleSize = new HashSet<>();
private final Set<Integer> mCurSampleSize = new HashSet<>();
private final Set<Integer> mAc3Header = new HashSet<>();
private long mExpireMs;
private long mDuration;
private long mSampleCount;
private long mTotalCount;
private long mStartMs;
private void flush() {
mExpireMs += mDuration;
mSampleCount = 0;
mCurSampleSize.clear();
mPtsList.clear();
}
/**
* Resets and initializes {@link AudioTrackMonitor}.
*
* @param duration the frequency of monitoring in milliseconds
*/
public void reset(long duration) {
mExpireMs = SystemClock.elapsedRealtime();
mDuration = duration;
mTotalCount = 0;
mStartMs = 0;
mSampleSize.clear();
mAc3Header.clear();
flush();
}
/**
* Adds an audio sample information for monitoring.
*
* @param pts the presentation timestamp of the sample
* @param sampleSize the size in bytes of the sample
* @param header the bitrate & sampling information header of the sample
*/
public void addPts(long pts, int sampleSize, int header) {
mTotalCount++;
mSampleCount++;
mSampleSize.add(sampleSize);
mAc3Header.add(header);
mCurSampleSize.add(sampleSize);
if (mTotalCount == 1) {
mStartMs = SystemClock.elapsedRealtime();
}
if (mPtsList.isEmpty() || mPtsList.get(mPtsList.size() - 1).first != pts) {
mPtsList.add(Pair.create(pts, 1));
return;
}
Pair<Long, Integer> pair = mPtsList.get(mPtsList.size() - 1);
mPtsList.set(mPtsList.size() - 1, Pair.create(pair.first, pair.second + 1));
}
/**
* Logs if interested events are present.
* <p>
* Periodic logging is not enabled in release mode in order to avoid verbose logging.
*/
public void maybeLog() {
long now = SystemClock.elapsedRealtime();
if (mExpireMs != 0 && now >= mExpireMs) {
if (DEBUG) {
long sampleDuration = (mTotalCount - 1) *
Ac3PassthroughTrackRenderer.AC3_SAMPLE_DURATION_US / 1000;
long totalDuration = now - mStartMs;
StringBuilder ptsBuilder = new StringBuilder();
ptsBuilder.append("PTS received ").append(mSampleCount).append(", ")
.append(totalDuration - sampleDuration).append(' ');
for (Pair<Long, Integer> pair : mPtsList) {
ptsBuilder.append('[').append(pair.first).append(':').append(pair.second)
.append("], ");
}
Log.d(TAG, ptsBuilder.toString());
}
if (DEBUG || mCurSampleSize.size() > 1) {
Log.d(TAG, "PTS received sample size: "
+ String.valueOf(mSampleSize) + mCurSampleSize + mAc3Header);
}
flush();
}
}
}
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