1 package com.coremedia.iso.boxes.apple; 2 3 import com.coremedia.iso.IsoTypeReader; 4 import com.coremedia.iso.IsoTypeWriter; 5 import com.googlecode.mp4parser.AbstractFullBox; 6 7 import java.nio.ByteBuffer; 8 9 /** 10 * 11 */ 12 public final class AppleLosslessSpecificBox extends AbstractFullBox { 13 14 public static final String TYPE = "alac"; 15 /* 16 Extradata: 32bit size 32bit tag (=alac) 32bit zero? 17 32bit max sample per frame 8bit ?? (zero?) 8bit sample 18 size 8bit history mult 8bit initial history 8bit kmodifier 19 8bit channels? 16bit ?? 32bit max coded frame size 32bit 20 bitrate? 32bit samplerate 21 */ 22 private long maxSamplePerFrame; // 32bi 23 private int unknown1; // 8bit 24 private int sampleSize; // 8bit 25 private int historyMult; // 8bit 26 private int initialHistory; // 8bit 27 private int kModifier; // 8bit 28 private int channels; // 8bit 29 private int unknown2; // 16bit 30 private long maxCodedFrameSize; // 32bit 31 private long bitRate; // 32bit 32 private long sampleRate; // 32bit 33 getMaxSamplePerFrame()34 public long getMaxSamplePerFrame() { 35 return maxSamplePerFrame; 36 } 37 setMaxSamplePerFrame(int maxSamplePerFrame)38 public void setMaxSamplePerFrame(int maxSamplePerFrame) { 39 this.maxSamplePerFrame = maxSamplePerFrame; 40 } 41 getUnknown1()42 public int getUnknown1() { 43 return unknown1; 44 } 45 setUnknown1(int unknown1)46 public void setUnknown1(int unknown1) { 47 this.unknown1 = unknown1; 48 } 49 getSampleSize()50 public int getSampleSize() { 51 return sampleSize; 52 } 53 setSampleSize(int sampleSize)54 public void setSampleSize(int sampleSize) { 55 this.sampleSize = sampleSize; 56 } 57 getHistoryMult()58 public int getHistoryMult() { 59 return historyMult; 60 } 61 setHistoryMult(int historyMult)62 public void setHistoryMult(int historyMult) { 63 this.historyMult = historyMult; 64 } 65 getInitialHistory()66 public int getInitialHistory() { 67 return initialHistory; 68 } 69 setInitialHistory(int initialHistory)70 public void setInitialHistory(int initialHistory) { 71 this.initialHistory = initialHistory; 72 } 73 getKModifier()74 public int getKModifier() { 75 return kModifier; 76 } 77 setKModifier(int kModifier)78 public void setKModifier(int kModifier) { 79 this.kModifier = kModifier; 80 } 81 getChannels()82 public int getChannels() { 83 return channels; 84 } 85 setChannels(int channels)86 public void setChannels(int channels) { 87 this.channels = channels; 88 } 89 getUnknown2()90 public int getUnknown2() { 91 return unknown2; 92 } 93 setUnknown2(int unknown2)94 public void setUnknown2(int unknown2) { 95 this.unknown2 = unknown2; 96 } 97 getMaxCodedFrameSize()98 public long getMaxCodedFrameSize() { 99 return maxCodedFrameSize; 100 } 101 setMaxCodedFrameSize(int maxCodedFrameSize)102 public void setMaxCodedFrameSize(int maxCodedFrameSize) { 103 this.maxCodedFrameSize = maxCodedFrameSize; 104 } 105 getBitRate()106 public long getBitRate() { 107 return bitRate; 108 } 109 setBitRate(int bitRate)110 public void setBitRate(int bitRate) { 111 this.bitRate = bitRate; 112 } 113 getSampleRate()114 public long getSampleRate() { 115 return sampleRate; 116 } 117 setSampleRate(int sampleRate)118 public void setSampleRate(int sampleRate) { 119 this.sampleRate = sampleRate; 120 } 121 122 123 @Override _parseDetails(ByteBuffer content)124 public void _parseDetails(ByteBuffer content) { 125 parseVersionAndFlags(content); 126 maxSamplePerFrame = IsoTypeReader.readUInt32(content); 127 unknown1 = IsoTypeReader.readUInt8(content); 128 sampleSize = IsoTypeReader.readUInt8(content); 129 historyMult = IsoTypeReader.readUInt8(content); 130 initialHistory = IsoTypeReader.readUInt8(content); 131 kModifier = IsoTypeReader.readUInt8(content); 132 channels = IsoTypeReader.readUInt8(content); 133 unknown2 = IsoTypeReader.readUInt16(content); 134 maxCodedFrameSize = IsoTypeReader.readUInt32(content); 135 bitRate = IsoTypeReader.readUInt32(content); 136 sampleRate = IsoTypeReader.readUInt32(content); 137 } 138 139 @Override getContent(ByteBuffer byteBuffer)140 protected void getContent(ByteBuffer byteBuffer) { 141 writeVersionAndFlags(byteBuffer); 142 IsoTypeWriter.writeUInt32(byteBuffer, maxSamplePerFrame); 143 IsoTypeWriter.writeUInt8(byteBuffer, unknown1); 144 IsoTypeWriter.writeUInt8(byteBuffer, sampleSize); 145 IsoTypeWriter.writeUInt8(byteBuffer, historyMult); 146 IsoTypeWriter.writeUInt8(byteBuffer, initialHistory); 147 IsoTypeWriter.writeUInt8(byteBuffer, kModifier); 148 IsoTypeWriter.writeUInt8(byteBuffer, channels); 149 IsoTypeWriter.writeUInt16(byteBuffer, unknown2); 150 IsoTypeWriter.writeUInt32(byteBuffer, maxCodedFrameSize); 151 IsoTypeWriter.writeUInt32(byteBuffer, bitRate); 152 IsoTypeWriter.writeUInt32(byteBuffer, sampleRate); 153 } 154 AppleLosslessSpecificBox()155 public AppleLosslessSpecificBox() { 156 super("alac"); 157 } 158 getContentSize()159 protected long getContentSize() { 160 return 28; 161 } 162 163 } 164