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

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/*  
 * Copyright 2008 CoreMedia AG, Hamburg
 *
 * Licensed under the Apache License, Version 2.0 (the License); 
 * you may not use this file except in compliance with the License. 
 * You may obtain a copy of the License at 
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0 
 * 
 * Unless required by applicable law or agreed to in writing, software 
 * distributed under the License is distributed on an AS IS BASIS, 
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
 * See the License for the specific language governing permissions and 
 * limitations under the License. 
 */

package com.coremedia.iso.boxes.sampleentry;

import com.coremedia.iso.BoxParser;
import com.coremedia.iso.IsoTypeReader;
import com.coremedia.iso.IsoTypeWriter;

import java.io.IOException;
import java.nio.ByteBuffer;

import com.googlecode.mp4parser.DataSource;

import java.nio.channels.WritableByteChannel;
import java.util.Arrays;

/**
 * 

4cc = "{@value #TYPE1}"

* Entry type for timed text samples defined in the timed text specification (ISO/IEC 14496-17). */ public class TextSampleEntry extends AbstractSampleEntry { public static final String TYPE1 = "tx3g"; public static final String TYPE_ENCRYPTED = "enct"; /* class TextSampleEntry() extends AbstractSampleEntry ('tx3g') { unsigned int(32) displayFlags; signed int(8) horizontal-justification; signed int(8) vertical-justification; unsigned int(8) background-color-rgba[4]; BoxRecord default-text-box; StyleRecord default-style; FontTableBox font-table; } */ private long displayFlags; // 32 bits private int horizontalJustification; // 8 bit private int verticalJustification; // 8 bit private int[] backgroundColorRgba = new int[4]; // 4 bytes private BoxRecord boxRecord = new BoxRecord(); private StyleRecord styleRecord = new StyleRecord(); public TextSampleEntry() { super(TYPE1); } public TextSampleEntry(String type) { super(type); } public void setType(String type) { this.type = type; } @Override public void parse(DataSource dataSource, ByteBuffer header, long contentSize, BoxParser boxParser) throws IOException { ByteBuffer content = ByteBuffer.allocate(38); dataSource.read(content); content.position(6); dataReferenceIndex = IsoTypeReader.readUInt16(content); displayFlags = IsoTypeReader.readUInt32(content); horizontalJustification = IsoTypeReader.readUInt8(content); verticalJustification = IsoTypeReader.readUInt8(content); backgroundColorRgba = new int[4]; backgroundColorRgba[0] = IsoTypeReader.readUInt8(content); backgroundColorRgba[1] = IsoTypeReader.readUInt8(content); backgroundColorRgba[2] = IsoTypeReader.readUInt8(content); backgroundColorRgba[3] = IsoTypeReader.readUInt8(content); boxRecord = new BoxRecord(); boxRecord.parse(content); styleRecord = new StyleRecord(); styleRecord.parse(content); initContainer(dataSource, contentSize - 38, boxParser); } @Override public void getBox(WritableByteChannel writableByteChannel) throws IOException { writableByteChannel.write(getHeader()); ByteBuffer byteBuffer = ByteBuffer.allocate(38); byteBuffer.position(6); IsoTypeWriter.writeUInt16(byteBuffer, dataReferenceIndex); IsoTypeWriter.writeUInt32(byteBuffer, displayFlags); IsoTypeWriter.writeUInt8(byteBuffer, horizontalJustification); IsoTypeWriter.writeUInt8(byteBuffer, verticalJustification); IsoTypeWriter.writeUInt8(byteBuffer, backgroundColorRgba[0]); IsoTypeWriter.writeUInt8(byteBuffer, backgroundColorRgba[1]); IsoTypeWriter.writeUInt8(byteBuffer, backgroundColorRgba[2]); IsoTypeWriter.writeUInt8(byteBuffer, backgroundColorRgba[3]); boxRecord.getContent(byteBuffer); styleRecord.getContent(byteBuffer); writableByteChannel.write((ByteBuffer) byteBuffer.rewind()); writeContainer(writableByteChannel); } public String toString() { return "TextSampleEntry"; } public BoxRecord getBoxRecord() { return boxRecord; } public void setBoxRecord(BoxRecord boxRecord) { this.boxRecord = boxRecord; } public StyleRecord getStyleRecord() { return styleRecord; } public void setStyleRecord(StyleRecord styleRecord) { this.styleRecord = styleRecord; } public boolean isScrollIn() { return (displayFlags & 0x00000020) == 0x00000020; } public void setScrollIn(boolean scrollIn) { if (scrollIn) { displayFlags |= 0x00000020; } else { displayFlags &= ~0x00000020; } } public boolean isScrollOut() { return (displayFlags & 0x00000040) == 0x00000040; } public void setScrollOut(boolean scrollOutIn) { if (scrollOutIn) { displayFlags |= 0x00000040; } else { displayFlags &= ~0x00000040; } } public boolean isScrollDirection() { return (displayFlags & 0x00000180) == 0x00000180; } public void setScrollDirection(boolean scrollOutIn) { if (scrollOutIn) { displayFlags |= 0x00000180; } else { displayFlags &= ~0x00000180; } } public boolean isContinuousKaraoke() { return (displayFlags & 0x00000800) == 0x00000800; } public void setContinuousKaraoke(boolean continuousKaraoke) { if (continuousKaraoke) { displayFlags |= 0x00000800; } else { displayFlags &= ~0x00000800; } } public boolean isWriteTextVertically() { return (displayFlags & 0x00020000) == 0x00020000; } public void setWriteTextVertically(boolean writeTextVertically) { if (writeTextVertically) { displayFlags |= 0x00020000; } else { displayFlags &= ~0x00020000; } } public boolean isFillTextRegion() { return (displayFlags & 0x00040000) == 0x00040000; } public void setFillTextRegion(boolean fillTextRegion) { if (fillTextRegion) { displayFlags |= 0x00040000; } else { displayFlags &= ~0x00040000; } } public int getHorizontalJustification() { return horizontalJustification; } public void setHorizontalJustification(int horizontalJustification) { this.horizontalJustification = horizontalJustification; } public int getVerticalJustification() { return verticalJustification; } public void setVerticalJustification(int verticalJustification) { this.verticalJustification = verticalJustification; } public int[] getBackgroundColorRgba() { return backgroundColorRgba; } public void setBackgroundColorRgba(int[] backgroundColorRgba) { this.backgroundColorRgba = backgroundColorRgba; } public static class BoxRecord { int top; int left; int bottom; int right; public BoxRecord() { } public BoxRecord(int top, int left, int bottom, int right) { this.top = top; this.left = left; this.bottom = bottom; this.right = right; } public void parse(ByteBuffer in) { top = IsoTypeReader.readUInt16(in); left = IsoTypeReader.readUInt16(in); bottom = IsoTypeReader.readUInt16(in); right = IsoTypeReader.readUInt16(in); } public void getContent(ByteBuffer bb) { IsoTypeWriter.writeUInt16(bb, top); IsoTypeWriter.writeUInt16(bb, left); IsoTypeWriter.writeUInt16(bb, bottom); IsoTypeWriter.writeUInt16(bb, right); } public int getSize() { return 8; } @Override public boolean equals(Object o) { if (this == o) return true; if (o == null || getClass() != o.getClass()) return false; BoxRecord boxRecord = (BoxRecord) o; if (bottom != boxRecord.bottom) return false; if (left != boxRecord.left) return false; if (right != boxRecord.right) return false; if (top != boxRecord.top) return false; return true; } @Override public int hashCode() { int result = top; result = 31 * result + left; result = 31 * result + bottom; result = 31 * result + right; return result; } } /* class FontRecord { unsigned int(16) font-ID; unsigned int(8) font-name-length; unsigned int(8) font[font-name-length]; } */ /* aligned(8) class StyleRecord { unsigned int(16) startChar; unsigned int(16) endChar; unsigned int(16) font-ID; unsigned int(8) face-style-flags; unsigned int(8) font-size; unsigned int(8) text-color-rgba[4]; } */ public static class StyleRecord { int startChar; int endChar; int fontId; int faceStyleFlags; int fontSize; int[] textColor = new int[]{0xff, 0xff, 0xff, 0xff}; public StyleRecord() { } public StyleRecord(int startChar, int endChar, int fontId, int faceStyleFlags, int fontSize, int[] textColor) { this.startChar = startChar; this.endChar = endChar; this.fontId = fontId; this.faceStyleFlags = faceStyleFlags; this.fontSize = fontSize; this.textColor = textColor; } public void parse(ByteBuffer in) { startChar = IsoTypeReader.readUInt16(in); endChar = IsoTypeReader.readUInt16(in); fontId = IsoTypeReader.readUInt16(in); faceStyleFlags = IsoTypeReader.readUInt8(in); fontSize = IsoTypeReader.readUInt8(in); textColor = new int[4]; textColor[0] = IsoTypeReader.readUInt8(in); textColor[1] = IsoTypeReader.readUInt8(in); textColor[2] = IsoTypeReader.readUInt8(in); textColor[3] = IsoTypeReader.readUInt8(in); } public void getContent(ByteBuffer bb) { IsoTypeWriter.writeUInt16(bb, startChar); IsoTypeWriter.writeUInt16(bb, endChar); IsoTypeWriter.writeUInt16(bb, fontId); IsoTypeWriter.writeUInt8(bb, faceStyleFlags); IsoTypeWriter.writeUInt8(bb, fontSize); IsoTypeWriter.writeUInt8(bb, textColor[0]); IsoTypeWriter.writeUInt8(bb, textColor[1]); IsoTypeWriter.writeUInt8(bb, textColor[2]); IsoTypeWriter.writeUInt8(bb, textColor[3]); } @Override public boolean equals(Object o) { if (this == o) return true; if (o == null || getClass() != o.getClass()) return false; StyleRecord that = (StyleRecord) o; if (endChar != that.endChar) return false; if (faceStyleFlags != that.faceStyleFlags) return false; if (fontId != that.fontId) return false; if (fontSize != that.fontSize) return false; if (startChar != that.startChar) return false; if (!Arrays.equals(textColor, that.textColor)) return false; return true; } @Override public int hashCode() { int result = startChar; result = 31 * result + endChar; result = 31 * result + fontId; result = 31 * result + faceStyleFlags; result = 31 * result + fontSize; result = 31 * result + (textColor != null ? Arrays.hashCode(textColor) : 0); return result; } public int getSize() { return 12; } } @Override public long getSize() { long s = getContainerSize(); long t = 38; // bytes to container start return s + t + ((largeBox || (s + t) >= (1L << 32)) ? 16 : 8); } }




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