Mercurial > hg > Members > riono > TreeVNC_ja_comment
annotate src/main/java/com/glavsoft/rfb/encoding/decoder/ZRLEDecoder.java @ 528:2956c4a7bfbd
define TileLoop class
| author | anatofuz |
|---|---|
| date | Fri, 03 May 2019 18:16:58 +0900 |
| parents | 96e15614a31f |
| children | 9de5137e1598 |
| rev | line source |
|---|---|
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1 // Copyright (C) 2010, 2011, 2012, 2013 GlavSoft LLC. |
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2 // All rights reserved. |
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3 // |
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4 //------------------------------------------------------------------------- |
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5 // This file is part of the TightVNC software. Please visit our Web site: |
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6 // |
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7 // http://www.tightvnc.com/ |
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8 // |
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9 // This program is free software; you can redistribute it and/or modify |
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10 // it under the terms of the GNU General Public License as published by |
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11 // the Free Software Foundation; either version 2 of the License, or |
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12 // (at your option) any later version. |
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13 // |
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14 // This program is distributed in the hope that it will be useful, |
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15 // but WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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17 // GNU General Public License for more details. |
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18 // |
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19 // You should have received a copy of the GNU General Public License along |
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20 // with this program; if not, write to the Free Software Foundation, Inc., |
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21 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
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22 //------------------------------------------------------------------------- |
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23 // |
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24 |
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25 package com.glavsoft.rfb.encoding.decoder; |
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26 |
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27 import com.glavsoft.drawing.Renderer; |
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28 import com.glavsoft.exceptions.TransportException; |
| 526 | 29 import com.glavsoft.rfb.encoding.EncodingType; |
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30 import com.glavsoft.transport.Reader; |
| 526 | 31 import jp.ac.u_ryukyu.treevnc.CheckDelay; |
| 498 | 32 import jp.ac.u_ryukyu.treevnc.TreeRFBProto; |
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33 |
| 526 | 34 import java.io.ByteArrayInputStream; |
| 35 import java.io.InputStream; | |
| 36 import java.io.UnsupportedEncodingException; | |
| 37 import java.nio.ByteBuffer; | |
| 528 | 38 import java.util.LinkedList; |
| 526 | 39 import java.util.zip.DataFormatException; |
| 40 import java.util.zip.Deflater; | |
| 41 | |
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42 public class ZRLEDecoder extends ZlibDecoder { |
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43 private static final int MAX_TILE_SIZE = 64; |
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44 private int[] decodedBitmap; |
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45 private int[] palette; |
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46 |
| 528 | 47 class TileLoop { |
| 48 private int deflate_size = 65507; | |
| 49 private ByteBuffer c1; | |
| 50 private FramebufferUpdateRectangle c1rect; | |
| 51 private int c1headerPos; | |
| 52 private int prevLineOffset; | |
| 53 private int prevC1Offset; | |
| 54 private int prevoffset; | |
| 55 private Deflater deflater; | |
| 56 | |
| 57 /** | |
| 58 * Multicast framebufferUpdate to children. | |
| 59 * read FrameBuffferUpdate. If it is ZLE, make it ZLEE which is self contained compressed packet. | |
| 60 * put the packet to the multicastqueue. Then normal rendering engine read the same stream using is.reset(). | |
| 61 * | |
| 62 * Haeder | |
| 63 * messageID ( FrameBuffer Update | |
| 64 * 1 byte padding | |
| 65 * 2 byte numberofrectangle | |
| 66 * 2 - U16 - x-position | |
| 67 * 2 - U16 - y-position | |
| 68 * 2 - U16 - width | |
| 69 * 2 - U16 - height | |
| 70 * 4 - S32 - encoding-type | |
| 71 * 4 byte datalengths | |
| 72 * datalengths databyte | |
| 73 * | |
| 74 * @throws TransportException | |
| 75 * @throws UnsupportedEncodingException | |
| 76 */ | |
| 77 | |
| 78 | |
| 79 private void zrleeBlocking(TreeRFBProto rfb, ByteBuffer header, byte[] bytes, FramebufferUpdateRectangle rect) throws TransportException, DataFormatException { | |
| 80 // dump32(inputs); | |
| 81 deflater = rfb.deflater; | |
| 82 c1 = rfb.multicastqueue.allocate(deflate_size); | |
| 83 if (rfb.addSerialNum) | |
| 84 c1.putLong(rfb.counter++); | |
| 85 if (rfb.checkDelay) | |
| 86 CheckDelay.checkDelay(c1, rect.x, rect.y, rect.width, rect.height, System.currentTimeMillis(), EncodingType.CHECK_DELAY); | |
| 87 c1headerPos = c1.position(); | |
| 88 c1.put(header); | |
| 89 header.flip(); | |
| 90 c1.putInt(0); | |
| 91 c1rect = new FramebufferUpdateRectangle(rect.x, rect.y, 0, 0); | |
| 92 return; | |
| 93 } | |
| 94 int spanGap = 128; | |
| 95 | |
| 96 /** | |
| 97 * | |
| 98 * @param rfb | |
| 99 * @param last | |
| 100 * @param header | |
| 101 * @param rect | |
| 102 * @param bytes | |
| 103 * @param offset | |
| 104 * @param tileX | |
| 105 * @param tileY | |
| 106 * @param tileW | |
| 107 * @param tileH | |
| 108 */ | |
| 109 public void multicastPut(TreeRFBProto rfb, boolean last, ByteBuffer header, FramebufferUpdateRectangle rect, byte[] bytes, int offset, int tileX, int tileY, int tileW, int tileH) { | |
| 110 int span = offset - prevoffset; | |
| 111 deflater.setInput(bytes,prevoffset,span); | |
| 112 prevoffset = offset; | |
| 113 c1rect.height += tileH; | |
| 114 c1rect.width += tileW; | |
| 115 if (c1rect.x > rect.x) { // phase0 | |
| 116 if (c1.remaining() > span + spanGap && c1rect.width < rect.width) { | |
| 117 deflater.deflate(c1, Deflater.SYNC_FLUSH); | |
| 118 return; | |
| 119 } | |
| 120 flushRectangle(rfb, header, rect, false); | |
| 121 return; | |
| 122 } | |
| 123 if (!last) { // phase1 | |
| 124 if (c1.remaining() > span + spanGap) { | |
| 125 if (c1rect.width >= rect.width) { | |
| 126 prevLineOffset = offset; | |
| 127 prevC1Offset = c1.position(); | |
| 128 } | |
| 129 deflater.deflate(c1, Deflater.SYNC_FLUSH); | |
| 130 } else { // phase2 | |
| 131 c1.position(prevC1Offset); | |
| 132 flushRectangle(rfb, header, rect, false); | |
| 133 deflater.setInput(bytes, prevLineOffset, span); | |
| 134 deflater.deflate(c1, Deflater.SYNC_FLUSH); | |
| 135 flushRectangle(rfb, header,rect, false); | |
| 136 } | |
| 137 return; | |
| 138 } | |
| 139 flushRectangle(rfb, header, rect, true); | |
| 140 } | |
| 141 | |
| 142 /** | |
| 143 * fix rectangle header | |
| 144 * create next rectangle header | |
| 145 * update position paramater | |
| 146 * send muticast pacate if nessesally | |
| 147 * @param rfb | |
| 148 * @param header | |
| 149 * @param rect | |
| 150 | |
| 151 * @param b | |
| 152 */ | |
| 153 private void flushRectangle(TreeRFBProto rfb, ByteBuffer header, FramebufferUpdateRectangle rect, boolean b) { | |
| 154 flushMuticast(rfb, header, rect); | |
| 155 } | |
| 156 | |
| 157 private void flushMuticast(TreeRFBProto rfb, ByteBuffer header, FramebufferUpdateRectangle rect) { | |
| 158 deflater.deflate(c1, Deflater.FULL_FLUSH); | |
| 159 deflater.finish(); | |
| 160 c1.flip(); | |
| 161 //System.out.println("multicastPut: " + c1rect + " length: " + (c1.remaining()-c1headerPos-header.limit())); | |
| 162 try { | |
| 163 writeUpdateRectangleWithHeader(c1, c1headerPos, c1.remaining()-c1headerPos-header.limit()-4, c1rect.x, c1rect.y, c1rect.width + tileW, c1rect.height + tileY); | |
| 164 } catch (InterruptedException e) { | |
| 165 e.printStackTrace(); | |
| 166 } | |
| 167 c1rect.x += c1rect.width; | |
| 168 if (c1rect.x >= rect.x + rect.width) { | |
| 169 c1rect.x = rect.x; | |
| 170 c1rect.y += tileH; | |
| 171 } | |
| 172 c1rect.width = 0; | |
| 173 c1 = rfb.multicastqueue.allocate(deflate_size); | |
| 174 if (rfb.addSerialNum) | |
| 175 c1.putLong(rfb.counter++); | |
| 176 c1headerPos = c1.position(); | |
| 177 c1.put(header); | |
| 178 header.flip(); | |
| 179 c1.putInt(0); | |
| 180 } | |
| 181 | |
| 182 /** | |
| 183 * make and send frameBufferUpdateRectangle packet | |
| 184 * @param c1 | |
| 185 * @param headerPos | |
| 186 * @param len2 | |
| 187 * @param x | |
| 188 * @param y | |
| 189 * @param w | |
| 190 * @param h | |
| 191 * @throws InterruptedException | |
| 192 * | |
| 193 */ | |
| 194 public void writeUpdateRectangleWithHeader(ByteBuffer c1, int headerPos, int len2, int x, int y, int w, int h) throws InterruptedException { | |
| 195 deflater.reset(); | |
| 196 | |
| 197 c1.putInt(headerPos + 16, len2); | |
| 198 c1.putShort(headerPos + 4, (short) x); | |
| 199 c1.putShort(headerPos + 6, (short) y); | |
| 200 c1.putShort(headerPos + 8, (short) w); | |
| 201 c1.putShort(headerPos + 10, (short) h); | |
| 202 LinkedList<ByteBuffer> bufs = new LinkedList<ByteBuffer>(); | |
| 203 bufs.add(c1); | |
| 204 if (rfb.isTreeManager && rfb.connectionPresenter.isUseMulticast()) { | |
| 205 for (ByteBuffer buf : bufs) | |
| 206 rfb.viewer.getRfbBroadcastListener().multicastUpdateRectangle(buf); | |
| 207 } else { | |
| 208 rfb.multicastqueue.waitput(bufs); | |
| 209 } | |
| 210 } | |
| 211 } | |
| 526 | 212 |
| 213 @Override | |
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214 public void decode(Reader reader, Renderer renderer, |
| 275 | 215 FramebufferUpdateRectangle rect) throws TransportException { |
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216 int zippedLength = (int) reader.readUInt32(); |
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217 if (0 == zippedLength) return; |
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218 int length = rect.width * rect.height * renderer.getBytesPerPixel(); |
| 3 | 219 byte[] bytes = unzip(reader, zippedLength, length, rect.getEncodingType()); |
| 526 | 220 decode1(renderer, null, rect, bytes, zippedLength, null); |
| 182 | 221 } |
| 222 | |
| 526 | 223 public void decode1(Renderer renderer, ByteBuffer header, FramebufferUpdateRectangle rect, byte[] bytes, int zippedLength, TreeRFBProto rfbProto) throws TransportException { |
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224 int offset = zippedLength; |
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225 int maxX = rect.x + rect.width; |
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226 int maxY = rect.y + rect.height; |
| 528 | 227 |
| 228 TileLoop tileloop = new TileLoop(); | |
| 501 | 229 //System.out.println("decode1: "+rect); |
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230 if (null == palette) { |
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231 palette = new int [128]; |
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232 } |
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233 if (null == decodedBitmap) { |
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234 decodedBitmap = new int[MAX_TILE_SIZE * MAX_TILE_SIZE]; |
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235 } |
| 526 | 236 |
| 237 if (rfbProto.multicastBlocking) { | |
| 238 try { | |
| 528 | 239 tileloop.zrleeBlocking(rfbProto, header, bytes, rect); |
| 526 | 240 } catch (DataFormatException e) { |
| 241 e.printStackTrace(); | |
| 242 } | |
| 243 } | |
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244 for (int tileY = rect.y; tileY < maxY; tileY += MAX_TILE_SIZE) { |
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245 int tileHeight = Math.min(maxY - tileY, MAX_TILE_SIZE); |
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246 |
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247 for (int tileX = rect.x; tileX < maxX; tileX += MAX_TILE_SIZE) { |
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248 int tileWidth = Math.min(maxX - tileX, MAX_TILE_SIZE); |
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249 int subencoding = bytes[offset++] & 0x0ff; |
| 63 | 250 if(subencoding!=0) |
| 251 System.out.println("----------------"+subencoding); | |
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252 // 128 -plain RLE, 130-255 - Palette RLE |
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253 boolean isRle = (subencoding & 128) != 0; |
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254 // 2 to 16 for raw packed palette data, 130 to 255 for Palette RLE (subencoding - 128) |
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255 int paletteSize = subencoding & 127; |
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256 offset += readPalette(bytes, offset, renderer, paletteSize); |
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257 if (1 == subencoding) { // A solid tile consisting of a single colour |
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258 renderer.fillRect(palette[0], tileX, tileY, tileWidth, tileHeight); |
| 500 | 259 } else if (isRle) { |
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260 if (0 == paletteSize) { // subencoding == 128 (or paletteSize == 0) - Plain RLE |
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261 offset += decodePlainRle(bytes, offset, renderer, tileX, tileY, tileWidth, tileHeight); |
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262 } else { |
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263 offset += decodePaletteRle(bytes, offset, renderer, tileX, tileY, tileWidth, tileHeight); |
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264 } |
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265 } else { |
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266 if (0 == paletteSize) { // subencoding == 0 (or paletteSize == 0) - raw CPIXEL data |
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267 offset += decodeRaw(bytes, offset, renderer, tileX, tileY, tileWidth, tileHeight); |
| 63 | 268 // System.out.println("offset:"+offset); |
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269 } else { |
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270 offset += decodePacked(bytes, offset, renderer, paletteSize, tileX, tileY, tileWidth, tileHeight); |
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271 } |
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272 } |
| 528 | 273 if (rfbProto != null && rfbProto.multicastBlocking) tileloop.multicastPut(rfbProto, false, header, rect, bytes, offset, tileX, tileY,tileWidth, tileHeight); |
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274 } |
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275 } |
| 528 | 276 if (rfbProto != null && rfbProto.multicastBlocking) tileloop.multicastPut(rfbProto, false, header, rect, bytes, offset, maxX, maxY, 0, 0); |
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277 } |
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278 |
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279 private int decodePlainRle(byte[] bytes, int offset, Renderer renderer, |
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280 int tileX, int tileY, int tileWidth, int tileHeight) { |
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281 int bytesPerCPixel = renderer.getBytesPerCPixel(); |
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282 int decodedOffset = 0; |
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283 int decodedEnd = tileWidth * tileHeight; |
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284 int index = offset; |
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285 while (decodedOffset < decodedEnd) { |
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286 int color = renderer.getCompactPixelColor(bytes, index); |
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287 index += bytesPerCPixel; |
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288 int rlength = 1; |
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289 do { |
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290 rlength += bytes[index] & 0x0ff; |
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291 } while ((bytes[index++] & 0x0ff) == 255); |
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292 assert rlength <= decodedEnd - decodedOffset; |
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293 renderer.fillColorBitmapWithColor(decodedBitmap, decodedOffset, rlength, color); |
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294 decodedOffset += rlength; |
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295 } |
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296 renderer.drawColoredBitmap(decodedBitmap, tileX, tileY, tileWidth, tileHeight); |
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297 return index - offset; |
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298 } |
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299 |
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300 private int decodePaletteRle(byte[] bytes, int offset, Renderer renderer, |
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301 int tileX, int tileY, int tileWidth, int tileHeight) { |
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302 int decodedOffset = 0; |
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303 int decodedEnd = tileWidth * tileHeight; |
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304 int index = offset; |
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305 while (decodedOffset < decodedEnd) { |
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306 int colorIndex = bytes[index++]; |
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307 int color = palette[colorIndex & 127]; |
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308 int rlength = 1; |
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309 if ((colorIndex & 128) != 0) { |
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310 do { |
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311 rlength += bytes[index] & 0x0ff; |
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312 } while (bytes[index++] == (byte) 255); |
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313 } |
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314 assert rlength <= decodedEnd - decodedOffset; |
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315 renderer.fillColorBitmapWithColor(decodedBitmap, decodedOffset, rlength, color); |
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316 decodedOffset += rlength; |
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317 } |
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318 renderer.drawColoredBitmap(decodedBitmap, tileX, tileY, tileWidth, tileHeight); |
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319 return index - offset; |
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320 } |
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321 |
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322 private int decodePacked(byte[] bytes, int offset, Renderer renderer, |
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323 int paletteSize, int tileX, int tileY, int tileWidth, int tileHeight) { |
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324 int bitsPerPalletedPixel = paletteSize > 16 ? 8 : paletteSize > 4 ? 4 |
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325 : paletteSize > 2 ? 2 : 1; |
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326 int packedOffset = offset; |
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327 int decodedOffset = 0; |
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328 for (int i = 0; i < tileHeight; ++i) { |
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329 int decodedRowEnd = decodedOffset + tileWidth; |
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330 int byteProcessed = 0; |
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331 int bitsRemain = 0; |
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332 |
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333 while (decodedOffset < decodedRowEnd) { |
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334 if (bitsRemain == 0) { |
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335 byteProcessed = bytes[packedOffset++]; |
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336 bitsRemain = 8; |
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337 } |
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338 bitsRemain -= bitsPerPalletedPixel; |
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339 int index = byteProcessed >> bitsRemain & (1 << bitsPerPalletedPixel) - 1 & 127; |
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340 int color = palette[index]; |
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341 renderer.fillColorBitmapWithColor(decodedBitmap, decodedOffset, 1, color); |
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342 ++decodedOffset; |
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343 } |
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344 } |
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345 renderer.drawColoredBitmap(decodedBitmap, tileX, tileY, tileWidth, tileHeight); |
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346 return packedOffset - offset; |
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347 } |
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348 |
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349 private int decodeRaw(byte[] bytes, int offset, Renderer renderer, |
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350 int tileX, int tileY, int tileWidth, int tileHeight) throws TransportException { |
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351 return renderer.drawCompactBytes(bytes, offset, tileX, tileY, tileWidth, tileHeight); |
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352 } |
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353 |
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354 private int readPalette(byte[] bytes, int offset, Renderer renderer, int paletteSize) { |
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355 final int bytesPerCPixel = renderer.getBytesPerCPixel(); |
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356 for (int i=0; i<paletteSize; ++i) { |
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357 palette[i] = renderer.getCompactPixelColor(bytes, offset + i* bytesPerCPixel); |
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358 } |
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359 return paletteSize * bytesPerCPixel; |
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360 } |
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361 |
| 526 | 362 |
| 363 | |
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364 } |