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A generic parser and writer for all ISO 14496 based files (MP4, Quicktime, DCF, PDCF, ...)

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package com.googlecode.mp4parser.boxes;

import com.coremedia.iso.IsoTypeReader;
import com.coremedia.iso.IsoTypeWriter;
import com.googlecode.mp4parser.AbstractBox;
import com.googlecode.mp4parser.annotations.DoNotParseDetail;
import com.googlecode.mp4parser.boxes.mp4.objectdescriptors.BitReaderBuffer;
import com.googlecode.mp4parser.boxes.mp4.objectdescriptors.BitWriterBuffer;

import java.nio.ByteBuffer;

/**
 * 

4cc = "{@value #TYPE}"

*/ public class DTSSpecificBox extends AbstractBox { public static final String TYPE = "ddts"; long DTSSamplingFrequency; long maxBitRate; long avgBitRate; int pcmSampleDepth; int frameDuration; int streamConstruction; int coreLFEPresent; int coreLayout; int coreSize; int stereoDownmix; int representationType; int channelLayout; int multiAssetFlag; int LBRDurationMod; int reservedBoxPresent; int reserved; public DTSSpecificBox() { super(TYPE); } @Override protected long getContentSize() { return 20; } @Override public void _parseDetails(ByteBuffer content) { DTSSamplingFrequency = IsoTypeReader.readUInt32(content); maxBitRate = IsoTypeReader.readUInt32(content); avgBitRate = IsoTypeReader.readUInt32(content); pcmSampleDepth = IsoTypeReader.readUInt8(content); BitReaderBuffer brb = new BitReaderBuffer(content); frameDuration = brb.readBits(2); streamConstruction = brb.readBits(5); coreLFEPresent = brb.readBits(1); coreLayout = brb.readBits(6); coreSize = brb.readBits(14); stereoDownmix = brb.readBits(1); representationType = brb.readBits(3); channelLayout = brb.readBits(16); multiAssetFlag = brb.readBits(1); LBRDurationMod = brb.readBits(1); reservedBoxPresent = brb.readBits(1); reserved = brb.readBits(5); } @Override protected void getContent(ByteBuffer byteBuffer) { IsoTypeWriter.writeUInt32(byteBuffer, DTSSamplingFrequency); IsoTypeWriter.writeUInt32(byteBuffer, maxBitRate); IsoTypeWriter.writeUInt32(byteBuffer, avgBitRate); IsoTypeWriter.writeUInt8(byteBuffer, pcmSampleDepth); BitWriterBuffer bwb = new BitWriterBuffer(byteBuffer); bwb.writeBits(frameDuration, 2); bwb.writeBits(streamConstruction, 5); bwb.writeBits(coreLFEPresent, 1); bwb.writeBits(coreLayout, 6); bwb.writeBits(coreSize, 14); bwb.writeBits(stereoDownmix, 1); bwb.writeBits(representationType, 3); bwb.writeBits(channelLayout, 16); bwb.writeBits(multiAssetFlag, 1); bwb.writeBits(LBRDurationMod, 1); bwb.writeBits(reservedBoxPresent, 1); bwb.writeBits(reserved, 5); } public long getAvgBitRate() { return avgBitRate; } public void setAvgBitRate(long avgBitRate) { this.avgBitRate = avgBitRate; } public long getDTSSamplingFrequency() { return DTSSamplingFrequency; } public void setDTSSamplingFrequency(long DTSSamplingFrequency) { this.DTSSamplingFrequency = DTSSamplingFrequency; } public long getMaxBitRate() { return maxBitRate; } public void setMaxBitRate(long maxBitRate) { this.maxBitRate = maxBitRate; } public int getPcmSampleDepth() { return pcmSampleDepth; } public void setPcmSampleDepth(int pcmSampleDepth) { this.pcmSampleDepth = pcmSampleDepth; } public int getFrameDuration() { return frameDuration; } public void setFrameDuration(int frameDuration) { this.frameDuration = frameDuration; } public int getStreamConstruction() { return streamConstruction; } public void setStreamConstruction(int streamConstruction) { this.streamConstruction = streamConstruction; } public int getCoreLFEPresent() { return coreLFEPresent; } public void setCoreLFEPresent(int coreLFEPresent) { this.coreLFEPresent = coreLFEPresent; } public int getCoreLayout() { return coreLayout; } public void setCoreLayout(int coreLayout) { this.coreLayout = coreLayout; } public int getCoreSize() { return coreSize; } public void setCoreSize(int coreSize) { this.coreSize = coreSize; } public int getStereoDownmix() { return stereoDownmix; } public void setStereoDownmix(int stereoDownmix) { this.stereoDownmix = stereoDownmix; } public int getRepresentationType() { return representationType; } public void setRepresentationType(int representationType) { this.representationType = representationType; } public int getChannelLayout() { return channelLayout; } public void setChannelLayout(int channelLayout) { this.channelLayout = channelLayout; } public int getMultiAssetFlag() { return multiAssetFlag; } public void setMultiAssetFlag(int multiAssetFlag) { this.multiAssetFlag = multiAssetFlag; } public int getLBRDurationMod() { return LBRDurationMod; } public void setLBRDurationMod(int LBRDurationMod) { this.LBRDurationMod = LBRDurationMod; } public int getReserved() { return reserved; } public void setReserved(int reserved) { this.reserved = reserved; } public int getReservedBoxPresent() { return reservedBoxPresent; } public void setReservedBoxPresent(int reservedBoxPresent) { this.reservedBoxPresent = reservedBoxPresent; } @DoNotParseDetail public int[] getDashAudioChannelConfiguration() { final int channelLayout = this.getChannelLayout(); int numChannels = 0; int dwChannelMask = 0; if ((channelLayout & 0x0001) == 0x0001) { //0001h Center in front of listener 1 numChannels += 1; dwChannelMask |= 0x00000004; //SPEAKER_FRONT_CENTER } if ((channelLayout & 0x0002) == 0x0002) { //0002h Left/Right in front 2 numChannels += 2; dwChannelMask |= 0x00000001; //SPEAKER_FRONT_LEFT dwChannelMask |= 0x00000002; //SPEAKER_FRONT_RIGHT } if ((channelLayout & 0x0004) == 0x0004) { //0004h Left/Right surround on side in rear 2 numChannels += 2; //* if Lss, Rss exist, then this position is equivalent to Lsr, Rsr respectively dwChannelMask |= 0x00000010; //SPEAKER_BACK_LEFT dwChannelMask |= 0x00000020; //SPEAKER_BACK_RIGHT } if ((channelLayout & 0x0008) == 0x0008) { //0008h Low frequency effects subwoofer 1 numChannels += 1; dwChannelMask |= 0x00000008; //SPEAKER_LOW_FREQUENCY } if ((channelLayout & 0x0010) == 0x0010) { //0010h Center surround in rear 1 numChannels += 1; dwChannelMask |= 0x00000100; //SPEAKER_BACK_CENTER } if ((channelLayout & 0x0020) == 0x0020) { //0020h Left/Right height in front 2 numChannels += 2; dwChannelMask |= 0x00001000; //SPEAKER_TOP_FRONT_LEFT dwChannelMask |= 0x00004000; //SPEAKER_TOP_FRONT_RIGHT } if ((channelLayout & 0x0040) == 0x0040) { //0040h Left/Right surround in rear 2 numChannels += 2; dwChannelMask |= 0x00000010; //SPEAKER_BACK_LEFT dwChannelMask |= 0x00000020; //SPEAKER_BACK_RIGHT } if ((channelLayout & 0x0080) == 0x0080) { //0080h Center Height in front 1 numChannels += 1; dwChannelMask |= 0x00002000; //SPEAKER_TOP_FRONT_CENTER } if ((channelLayout & 0x0100) == 0x0100) { //0100h Over the listener’s head 1 numChannels += 1; dwChannelMask |= 0x00000800; //SPEAKER_TOP_CENTER } if ((channelLayout & 0x0200) == 0x0200) { //0200h Between left/right and center in front 2 numChannels += 2; dwChannelMask |= 0x00000040; //SPEAKER_FRONT_LEFT_OF_CENTER dwChannelMask |= 0x00000080; //SPEAKER_FRONT_RIGHT_OF_CENTER } if ((channelLayout & 0x0400) == 0x0400) { //0400h Left/Right on side in front 2 numChannels += 2; dwChannelMask |= 0x00000200; //SPEAKER_SIDE_LEFT dwChannelMask |= 0x00000400; //SPEAKER_SIDE_RIGHT } if ((channelLayout & 0x0800) == 0x0800) { //0800h Left/Right surround on side 2 numChannels += 2; //* if Lss, Rss exist, then this position is equivalent to Lsr, Rsr respectively dwChannelMask |= 0x00000010; //SPEAKER_BACK_LEFT dwChannelMask |= 0x00000020; //SPEAKER_BACK_RIGHT } if ((channelLayout & 0x1000) == 0x1000) { //1000h Second low frequency effects subwoofer 1 numChannels += 1; dwChannelMask |= 0x00000008; //SPEAKER_LOW_FREQUENCY } if ((channelLayout & 0x2000) == 0x2000) { //2000h Left/Right height on side 2 numChannels += 2; dwChannelMask |= 0x00000010; //SPEAKER_BACK_LEFT dwChannelMask |= 0x00000020; //SPEAKER_BACK_RIGHT } if ((channelLayout & 0x4000) == 0x4000) { //4000h Center height in rear 1 numChannels += 1; dwChannelMask |= 0x00010000; //SPEAKER_TOP_BACK_CENTER } if ((channelLayout & 0x8000) == 0x8000) { //8000h Left/Right height in rear 2 numChannels += 2; dwChannelMask |= 0x00008000; //SPEAKER_TOP_BACK_LEFT dwChannelMask |= 0x00020000; //SPEAKER_TOP_BACK_RIGHT } if ((channelLayout & 0x10000) == 0x10000) { //10000h Center below in front numChannels += 1; } if ((channelLayout & 0x20000) == 0x20000) { //20000h Left/Right below in front numChannels += 2; } return new int[]{numChannels, dwChannelMask}; } }




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