1 /* 2 * Copyright (C) 2020 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.tv.tuner.exoplayer2; 17 18 import android.support.annotation.Nullable; 19 20 import com.google.android.exoplayer2.source.BaseMediaSource; 21 import com.google.android.exoplayer2.source.MediaPeriod; 22 import com.google.android.exoplayer2.source.MediaSource; 23 import com.google.android.exoplayer2.source.SinglePeriodTimeline; 24 import com.google.android.exoplayer2.upstream.Allocator; 25 import com.google.android.exoplayer2.upstream.TransferListener; 26 import com.google.android.exoplayer2.util.Assertions; 27 28 /** {@link MediaSource} that extracts sample data using a {@link SampleExtractor}. */ 29 30 public final class MpegTsMediaSource extends BaseMediaSource { 31 32 private static final String TAG = "MpegTsMediaSource"; 33 34 private final SampleExtractor mSampleExtractor; 35 36 /** 37 * Creates a new sample source that extracts samples using {@code mSampleExtractor}. 38 * 39 * @param sampleExtractor a sample extractor for accessing media samples 40 */ MpegTsMediaSource(SampleExtractor sampleExtractor)41 public MpegTsMediaSource(SampleExtractor sampleExtractor) { 42 mSampleExtractor = Assertions.checkNotNull(sampleExtractor); 43 } 44 45 @Override prepareSourceInternal(@ullable TransferListener mediaTransferListener)46 protected void prepareSourceInternal(@Nullable TransferListener mediaTransferListener) { 47 refreshSourceInfo(new SinglePeriodTimeline(0, false, false), null); 48 } 49 50 @Override releaseSourceInternal()51 protected void releaseSourceInternal() { 52 // Do nothing 53 } 54 55 @Override maybeThrowSourceInfoRefreshError()56 public void maybeThrowSourceInfoRefreshError() { 57 // Do nothing 58 } 59 60 @Override createPeriod( MediaPeriodId id, Allocator allocator, long startPositionUs)61 public MpegTsMediaPeriod createPeriod( 62 MediaPeriodId id, 63 Allocator allocator, 64 long startPositionUs) { 65 return new MpegTsMediaPeriod(mSampleExtractor); 66 } 67 68 @Override releasePeriod(MediaPeriod mediaPeriod)69 public void releasePeriod(MediaPeriod mediaPeriod) { 70 ((MpegTsMediaPeriod) mediaPeriod).release(); 71 } 72 } 73