1 /* 2 * Copyright 2008 CoreMedia AG, Hamburg 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.coremedia.iso.boxes; 18 19 import com.coremedia.iso.IsoTypeReader; 20 import com.coremedia.iso.IsoTypeWriter; 21 import com.googlecode.mp4parser.AbstractFullBox; 22 23 import java.nio.ByteBuffer; 24 25 import static com.googlecode.mp4parser.util.CastUtils.l2i; 26 27 /** 28 * This box provides a compact marking of the random access points withinthe stream. The table is arranged in 29 * strictly decreasinf order of sample number. Defined in ISO/IEC 14496-12. 30 */ 31 public class SyncSampleBox extends AbstractFullBox { 32 public static final String TYPE = "stss"; 33 34 private long[] sampleNumber; 35 36 public SyncSampleBox() { 37 super(TYPE); 38 } 39 40 /** 41 * Gives the numbers of the samples that are random access points in the stream. 42 * 43 * @return random access sample numbers. 44 */ 45 public long[] getSampleNumber() { 46 return sampleNumber; 47 } 48 49 protected long getContentSize() { 50 return sampleNumber.length * 4 + 8; 51 } 52 53 @Override 54 public void _parseDetails(ByteBuffer content) { 55 parseVersionAndFlags(content); 56 int entryCount = l2i(IsoTypeReader.readUInt32(content)); 57 58 sampleNumber = new long[entryCount]; 59 for (int i = 0; i < entryCount; i++) { 60 sampleNumber[i] = IsoTypeReader.readUInt32(content); 61 } 62 } 63 64 @Override 65 protected void getContent(ByteBuffer byteBuffer) { 66 writeVersionAndFlags(byteBuffer); 67 68 IsoTypeWriter.writeUInt32(byteBuffer, sampleNumber.length); 69 70 for (long aSampleNumber : sampleNumber) { 71 IsoTypeWriter.writeUInt32(byteBuffer, aSampleNumber); 72 } 73 74 } 75 76 public String toString() { 77 return "SyncSampleBox[entryCount=" + sampleNumber.length + "]"; 78 } 79 80 public void setSampleNumber(long[] sampleNumber) { 81 this.sampleNumber = sampleNumber; 82 } 83 } 84
