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.sampleentry; 18 19 import com.coremedia.iso.IsoTypeReader; 20 import com.coremedia.iso.IsoTypeWriter; 21 import com.coremedia.iso.boxes.Box; 22 23 import java.io.IOException; 24 import java.nio.ByteBuffer; 25 26 /** 27 * Entry type for timed text samples defined in the timed text specification (ISO/IEC 14496-17). 28 */ 29 public class TextSampleEntry extends SampleEntry { 30 31 public static final String TYPE1 = "tx3g"; 32 33 public static final String TYPE_ENCRYPTED = "enct"; 34 35 /* class TextSampleEntry() extends SampleEntry ('tx3g') { 36 unsigned int(32) displayFlags; 37 signed int(8) horizontal-justification; 38 signed int(8) vertical-justification; 39 unsigned int(8) background-color-rgba[4]; 40 BoxRecord default-text-box; 41 StyleRecord default-style; 42 FontTableBox font-table; 43 } 44 */ 45 46 private long displayFlags; // 32 bits 47 private int horizontalJustification; // 8 bit 48 private int verticalJustification; // 8 bit 49 private int[] backgroundColorRgba = new int[4]; // 4 bytes 50 private BoxRecord boxRecord = new BoxRecord(); 51 private StyleRecord styleRecord = new StyleRecord(); 52 53 public TextSampleEntry(String type) { 54 super(type); 55 } 56 57 @Override 58 public void _parseDetails(ByteBuffer content) { 59 _parseReservedAndDataReferenceIndex(content); 60 displayFlags = IsoTypeReader.readUInt32(content); 61 horizontalJustification = IsoTypeReader.readUInt8(content); 62 verticalJustification = IsoTypeReader.readUInt8(content); 63 backgroundColorRgba = new int[4]; 64 backgroundColorRgba[0] = IsoTypeReader.readUInt8(content); 65 backgroundColorRgba[1] = IsoTypeReader.readUInt8(content); 66 backgroundColorRgba[2] = IsoTypeReader.readUInt8(content); 67 backgroundColorRgba[3] = IsoTypeReader.readUInt8(content); 68 boxRecord = new BoxRecord(); 69 boxRecord.parse(content); 70 71 styleRecord = new StyleRecord(); 72 styleRecord.parse(content); 73 _parseChildBoxes(content); 74 } 75 76 77 protected long getContentSize() { 78 long contentSize = 18; 79 contentSize += boxRecord.getSize(); 80 contentSize += styleRecord.getSize(); 81 for (Box boxe : boxes) { 82 contentSize += boxe.getSize(); 83 } 84 return contentSize; 85 } 86 87 public String toString() { 88 return "TextSampleEntry"; 89 } 90 91 @Override 92 protected void getContent(ByteBuffer byteBuffer) { 93 _writeReservedAndDataReferenceIndex(byteBuffer); 94 IsoTypeWriter.writeUInt32(byteBuffer, displayFlags); 95 IsoTypeWriter.writeUInt8(byteBuffer, horizontalJustification); 96 IsoTypeWriter.writeUInt8(byteBuffer, verticalJustification); 97 IsoTypeWriter.writeUInt8(byteBuffer, backgroundColorRgba[0]); 98 IsoTypeWriter.writeUInt8(byteBuffer, backgroundColorRgba[1]); 99 IsoTypeWriter.writeUInt8(byteBuffer, backgroundColorRgba[2]); 100 IsoTypeWriter.writeUInt8(byteBuffer, backgroundColorRgba[3]); 101 boxRecord.getContent(byteBuffer); 102 styleRecord.getContent(byteBuffer); 103 104 _writeChildBoxes(byteBuffer); 105 } 106 107 public BoxRecord getBoxRecord() { 108 return boxRecord; 109 } 110 111 public void setBoxRecord(BoxRecord boxRecord) { 112 this.boxRecord = boxRecord; 113 } 114 115 public StyleRecord getStyleRecord() { 116 return styleRecord; 117 } 118 119 public void setStyleRecord(StyleRecord styleRecord) { 120 this.styleRecord = styleRecord; 121 } 122 123 public boolean isScrollIn() { 124 return (displayFlags & 0x00000020) == 0x00000020; 125 } 126 127 public void setScrollIn(boolean scrollIn) { 128 if (scrollIn) { 129 displayFlags |= 0x00000020; 130 } else { 131 displayFlags &= ~0x00000020; 132 } 133 } 134 135 public boolean isScrollOut() { 136 return (displayFlags & 0x00000040) == 0x00000040; 137 } 138 139 public void setScrollOut(boolean scrollOutIn) { 140 if (scrollOutIn) { 141 displayFlags |= 0x00000040; 142 } else { 143 displayFlags &= ~0x00000040; 144 } 145 } 146 147 public boolean isScrollDirection() { 148 return (displayFlags & 0x00000180) == 0x00000180; 149 } 150 151 public void setScrollDirection(boolean scrollOutIn) { 152 if (scrollOutIn) { 153 displayFlags |= 0x00000180; 154 } else { 155 displayFlags &= ~0x00000180; 156 } 157 } 158 159 public boolean isContinuousKaraoke() { 160 return (displayFlags & 0x00000800) == 0x00000800; 161 } 162 163 public void setContinuousKaraoke(boolean continuousKaraoke) { 164 if (continuousKaraoke) { 165 displayFlags |= 0x00000800; 166 } else { 167 displayFlags &= ~0x00000800; 168 } 169 } 170 171 public boolean isWriteTextVertically() { 172 return (displayFlags & 0x00020000) == 0x00020000; 173 } 174 175 public void setWriteTextVertically(boolean writeTextVertically) { 176 if (writeTextVertically) { 177 displayFlags |= 0x00020000; 178 } else { 179 displayFlags &= ~0x00020000; 180 } 181 } 182 183 184 public boolean isFillTextRegion() { 185 return (displayFlags & 0x00040000) == 0x00040000; 186 } 187 188 public void setFillTextRegion(boolean fillTextRegion) { 189 if (fillTextRegion) { 190 displayFlags |= 0x00040000; 191 } else { 192 displayFlags &= ~0x00040000; 193 } 194 } 195 196 197 public int getHorizontalJustification() { 198 return horizontalJustification; 199 } 200 201 public void setHorizontalJustification(int horizontalJustification) { 202 this.horizontalJustification = horizontalJustification; 203 } 204 205 public int getVerticalJustification() { 206 return verticalJustification; 207 } 208 209 public void setVerticalJustification(int verticalJustification) { 210 this.verticalJustification = verticalJustification; 211 } 212 213 public int[] getBackgroundColorRgba() { 214 return backgroundColorRgba; 215 } 216 217 public void setBackgroundColorRgba(int[] backgroundColorRgba) { 218 this.backgroundColorRgba = backgroundColorRgba; 219 } 220 221 public static class BoxRecord { 222 int top; 223 int left; 224 int bottom; 225 int right; 226 227 public void parse(ByteBuffer in) { 228 top = IsoTypeReader.readUInt16(in); 229 left = IsoTypeReader.readUInt16(in); 230 bottom = IsoTypeReader.readUInt16(in); 231 right = IsoTypeReader.readUInt16(in); 232 } 233 234 public void getContent(ByteBuffer bb) { 235 IsoTypeWriter.writeUInt16(bb, top); 236 IsoTypeWriter.writeUInt16(bb, left); 237 IsoTypeWriter.writeUInt16(bb, bottom); 238 IsoTypeWriter.writeUInt16(bb, right); 239 } 240 241 public int getSize() { 242 return 8; 243 } 244 } 245 246 /* 247 class FontRecord { 248 unsigned int(16) font-ID; 249 unsigned int(8) font-name-length; 250 unsigned int(8) font[font-name-length]; 251 } 252 */ 253 254 255 /* 256 aligned(8) class StyleRecord { 257 unsigned int(16) startChar; 258 unsigned int(16) endChar; 259 unsigned int(16) font-ID; 260 unsigned int(8) face-style-flags; 261 unsigned int(8) font-size; 262 unsigned int(8) text-color-rgba[4]; 263 } 264 */ 265 public static class StyleRecord { 266 int startChar; 267 int endChar; 268 int fontId; 269 int faceStyleFlags; 270 int fontSize; 271 int[] textColor = new int[]{0xff, 0xff, 0xff, 0xff}; 272 273 public void parse(ByteBuffer in) { 274 startChar = IsoTypeReader.readUInt16(in); 275 endChar = IsoTypeReader.readUInt16(in); 276 fontId = IsoTypeReader.readUInt16(in); 277 faceStyleFlags = IsoTypeReader.readUInt8(in); 278 fontSize = IsoTypeReader.readUInt8(in); 279 textColor = new int[4]; 280 textColor[0] = IsoTypeReader.readUInt8(in); 281 textColor[1] = IsoTypeReader.readUInt8(in); 282 textColor[2] = IsoTypeReader.readUInt8(in); 283 textColor[3] = IsoTypeReader.readUInt8(in); 284 } 285 286 287 public void getContent(ByteBuffer bb) { 288 IsoTypeWriter.writeUInt16(bb, startChar); 289 IsoTypeWriter.writeUInt16(bb, endChar); 290 IsoTypeWriter.writeUInt16(bb, fontId); 291 IsoTypeWriter.writeUInt8(bb, faceStyleFlags); 292 IsoTypeWriter.writeUInt8(bb, fontSize); 293 IsoTypeWriter.writeUInt8(bb, textColor[0]); 294 IsoTypeWriter.writeUInt8(bb, textColor[1]); 295 IsoTypeWriter.writeUInt8(bb, textColor[2]); 296 IsoTypeWriter.writeUInt8(bb, textColor[3]); 297 } 298 299 public int getSize() { 300 return 12; 301 } 302 } 303 304 305 } 306
