| /* |
| * 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.buffer; |
| |
| import com.google.android.exoplayer.SampleHolder; |
| import com.google.android.exoplayer.SampleSource; |
| |
| import java.util.LinkedList; |
| |
| /** |
| * A sample queue which reads from the buffer and passes to player pipeline. |
| */ |
| public class SampleQueue { |
| private final LinkedList<SampleHolder> mQueue = new LinkedList<>(); |
| private final SamplePool mSamplePool; |
| private Long mLastQueuedPositionUs = null; |
| |
| public SampleQueue(SamplePool samplePool) { |
| mSamplePool = samplePool; |
| } |
| |
| public void queueSample(SampleHolder sample) { |
| mQueue.offer(sample); |
| mLastQueuedPositionUs = sample.timeUs; |
| } |
| |
| public int dequeueSample(SampleHolder sample) { |
| SampleHolder sampleFromQueue = mQueue.poll(); |
| if (sampleFromQueue == null) { |
| return SampleSource.NOTHING_READ; |
| } |
| sample.ensureSpaceForWrite(sampleFromQueue.size); |
| sample.size = sampleFromQueue.size; |
| sample.flags = sampleFromQueue.flags; |
| sample.timeUs = sampleFromQueue.timeUs; |
| sample.clearData(); |
| sampleFromQueue.data.position(0).limit(sample.size); |
| sample.data.put(sampleFromQueue.data); |
| mSamplePool.releaseSample(sampleFromQueue); |
| return SampleSource.SAMPLE_READ; |
| } |
| |
| public void clear() { |
| while (!mQueue.isEmpty()) { |
| mSamplePool.releaseSample(mQueue.poll()); |
| } |
| mLastQueuedPositionUs = null; |
| } |
| |
| public Long getLastQueuedPositionUs() { |
| return mLastQueuedPositionUs; |
| } |
| |
| public boolean isDurationGreaterThan(long durationUs) { |
| return !mQueue.isEmpty() && mQueue.getLast().timeUs - mQueue.getFirst().timeUs > durationUs; |
| } |
| |
| public boolean isEmpty() { |
| return mQueue.isEmpty(); |
| } |
| } |