1 /* 2 * Copyright (C) 2016 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 17 package com.android.tv.tuner.source; 18 19 import com.google.android.exoplayer.upstream.DataSource; 20 21 /** 22 * {@link DataSource} for MPEG-TS stream, which will be used by {@link TsExtractor}. 23 */ 24 public abstract class TsDataSource implements DataSource { 25 26 /** 27 * Returns the number of bytes being buffered by {@link TsStreamer} so far. 28 * 29 * @return the buffered position 30 */ getBufferedPosition()31 public long getBufferedPosition() { 32 return 0; 33 } 34 35 /** 36 * Returns the offset position where the last {@link DataSource#read} read. 37 * 38 * @return the last read position 39 */ getLastReadPosition()40 public long getLastReadPosition() { 41 return 0; 42 } 43 44 /** 45 * Shifts start position by the specified offset. 46 * Do not call this method when the class already provided MPEG-TS stream to the extractor. 47 * @param offset 0 <= offset <= buffered position 48 */ shiftStartPosition(long offset)49 public void shiftStartPosition(long offset) { } 50 }