Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 1 | // |
| 2 | // Copyright (C) 2002 HorizonLive.com, Inc. All Rights Reserved. |
| 3 | // |
| 4 | // This is free software; you can redistribute it and/or modify |
| 5 | // it under the terms of the GNU General Public License as published by |
| 6 | // the Free Software Foundation; either version 2 of the License, or |
| 7 | // (at your option) any later version. |
| 8 | // |
| 9 | // This software is distributed in the hope that it will be useful, |
| 10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | // GNU General Public License for more details. |
| 13 | // |
| 14 | // You should have received a copy of the GNU General Public License |
| 15 | // along with this software; if not, write to the Free Software |
| 16 | // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
| 17 | // USA. |
| 18 | // |
| 19 | |
| 20 | // |
| 21 | // FbsInputStream.java |
| 22 | // |
| 23 | |
Constantin Kaplinsky | cf689b3 | 2008-04-30 12:50:34 +0000 | [diff] [blame] | 24 | package com.tightvnc.rfbplayer; |
wimba.com | c23aeb0 | 2004-09-16 00:00:00 +0000 | [diff] [blame] | 25 | |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 26 | import java.io.*; |
Constantin Kaplinsky | 5a7133a | 2002-07-24 17:02:04 +0000 | [diff] [blame] | 27 | import java.util.*; |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 28 | |
| 29 | class FbsInputStream extends InputStream { |
| 30 | |
| 31 | protected InputStream in; |
| 32 | protected long startTime; |
| 33 | protected long timeOffset; |
Constantin Kaplinsky | 52c4824 | 2002-05-30 13:26:34 +0000 | [diff] [blame] | 34 | protected long seekOffset; |
Constantin Kaplinsky | d8770f6 | 2002-08-16 16:01:37 +0000 | [diff] [blame] | 35 | protected boolean seekBackwards; |
Constantin Kaplinsky | ba0c4df | 2002-05-30 12:23:25 +0000 | [diff] [blame] | 36 | protected boolean paused; |
wimba.com | d1f56df | 2004-11-01 16:18:54 +0000 | [diff] [blame] | 37 | protected boolean isQuitting = false; |
Constantin Kaplinsky | ce39d3b | 2002-05-30 15:54:56 +0000 | [diff] [blame] | 38 | protected double playbackSpeed; |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 39 | |
| 40 | protected byte[] buffer; |
| 41 | protected int bufferSize; |
| 42 | protected int bufferPos; |
| 43 | |
Constantin Kaplinsky | 5a7133a | 2002-07-24 17:02:04 +0000 | [diff] [blame] | 44 | protected Observer obs; |
| 45 | |
Constantin Kaplinsky | d9ade18 | 2008-06-18 11:27:50 +0000 | [diff] [blame] | 46 | /** |
Constantin Kaplinsky | 7fea1c4 | 2008-06-19 03:31:40 +0000 | [diff] [blame] | 47 | * Construct FbsInputStream object based on the given InputStream, positioned |
| 48 | * at the very beginning of the corresponding FBS file. This constructor |
| 49 | * reads and checks FBS file signature which would look like "FBS 001.000\n", |
| 50 | * but any decimal number is allowed after the dot. |
Constantin Kaplinsky | d9ade18 | 2008-06-18 11:27:50 +0000 | [diff] [blame] | 51 | * |
Constantin Kaplinsky | 7fea1c4 | 2008-06-19 03:31:40 +0000 | [diff] [blame] | 52 | * @param in the InputStream object that will be used as a base for this new |
| 53 | * FbsInputStream instance. It should be positioned at the very beginning of |
| 54 | * the corresponding FBS file, so that first 12 bytes read from the stream |
| 55 | * should form FBS file signature. |
| 56 | * @throws java.io.IOException thrown on read error or on incorrect FBS file |
| 57 | * signature. |
Constantin Kaplinsky | d9ade18 | 2008-06-18 11:27:50 +0000 | [diff] [blame] | 58 | */ |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 59 | FbsInputStream(InputStream in) throws IOException { |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 60 | this.in = in; |
| 61 | startTime = System.currentTimeMillis(); |
| 62 | timeOffset = 0; |
Constantin Kaplinsky | 52c4824 | 2002-05-30 13:26:34 +0000 | [diff] [blame] | 63 | seekOffset = -1; |
Constantin Kaplinsky | d8770f6 | 2002-08-16 16:01:37 +0000 | [diff] [blame] | 64 | seekBackwards = false; |
Constantin Kaplinsky | ba0c4df | 2002-05-30 12:23:25 +0000 | [diff] [blame] | 65 | paused = false; |
Constantin Kaplinsky | ce39d3b | 2002-05-30 15:54:56 +0000 | [diff] [blame] | 66 | playbackSpeed = 1.0; |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 67 | |
| 68 | byte[] b = new byte[12]; |
| 69 | readFully(b); |
| 70 | |
| 71 | if (b[0] != 'F' || b[1] != 'B' || b[2] != 'S' || b[3] != ' ' || |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 72 | b[4] != '0' || b[5] != '0' || b[6] != '1' || b[7] != '.' || |
| 73 | b[8] < '0' || b[8] > '9' || b[9] < '0' || b[9] > '9' || |
| 74 | b[10] < '0' || b[10] > '9' || b[11] != '\n') { |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 75 | throw new IOException("Incorrect protocol version"); |
| 76 | } |
| 77 | |
| 78 | buffer = null; |
| 79 | bufferSize = 0; |
| 80 | bufferPos = 0; |
| 81 | } |
| 82 | |
wimba.com | d1f56df | 2004-11-01 16:18:54 +0000 | [diff] [blame] | 83 | // Force stream to finish any wait. |
| 84 | public void quit() { |
| 85 | isQuitting = true; |
| 86 | synchronized(this) { |
| 87 | notify(); |
| 88 | } |
| 89 | } |
| 90 | |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 91 | // |
| 92 | // Basic methods overriding InputStream's methods. |
| 93 | // |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 94 | public int read() throws IOException { |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 95 | while (bufferSize == 0) { |
| 96 | if (!fillBuffer()) |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 97 | return -1; |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 98 | } |
| 99 | bufferSize--; |
| 100 | return buffer[bufferPos++] & 0xFF; |
| 101 | } |
| 102 | |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 103 | public int available() throws IOException { |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 104 | // FIXME: This will work incorrectly if our caller will wait until |
| 105 | // some amount of data is available when the buffer contains less |
| 106 | // data than then that. Current implementation never reads more |
| 107 | // data until the buffer is fully exhausted. |
| 108 | return bufferSize; |
| 109 | } |
| 110 | |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 111 | public synchronized void close() throws IOException { |
wimba.com | 275f607 | 2005-01-11 19:02:12 +0000 | [diff] [blame] | 112 | if (in != null) |
| 113 | in.close(); |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 114 | in = null; |
Constantin Kaplinsky | ac6420d | 2002-05-29 17:05:39 +0000 | [diff] [blame] | 115 | startTime = -1; |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 116 | timeOffset = 0; |
Constantin Kaplinsky | 52c4824 | 2002-05-30 13:26:34 +0000 | [diff] [blame] | 117 | seekOffset = -1; |
Constantin Kaplinsky | d8770f6 | 2002-08-16 16:01:37 +0000 | [diff] [blame] | 118 | seekBackwards = false; |
Constantin Kaplinsky | ba0c4df | 2002-05-30 12:23:25 +0000 | [diff] [blame] | 119 | paused = false; |
Constantin Kaplinsky | ce39d3b | 2002-05-30 15:54:56 +0000 | [diff] [blame] | 120 | playbackSpeed = 1.0; |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 121 | |
| 122 | buffer = null; |
| 123 | bufferSize = 0; |
| 124 | bufferPos = 0; |
Constantin Kaplinsky | 5a7133a | 2002-07-24 17:02:04 +0000 | [diff] [blame] | 125 | |
| 126 | obs = null; |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 127 | } |
| 128 | |
| 129 | // |
| 130 | // Methods providing additional functionality. |
| 131 | // |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 132 | public synchronized long getTimeOffset() { |
Constantin Kaplinsky | 5a7133a | 2002-07-24 17:02:04 +0000 | [diff] [blame] | 133 | long off = Math.max(seekOffset, timeOffset); |
| 134 | return (long)(off * playbackSpeed); |
Constantin Kaplinsky | fe07983 | 2002-05-29 00:52:32 +0000 | [diff] [blame] | 135 | } |
| 136 | |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 137 | public synchronized void setTimeOffset(long pos) { |
Constantin Kaplinsky | ce39d3b | 2002-05-30 15:54:56 +0000 | [diff] [blame] | 138 | seekOffset = (long)(pos / playbackSpeed); |
Constantin Kaplinsky | d8770f6 | 2002-08-16 16:01:37 +0000 | [diff] [blame] | 139 | if (seekOffset < timeOffset) { |
| 140 | seekBackwards = true; |
| 141 | } |
Constantin Kaplinsky | 52c4824 | 2002-05-30 13:26:34 +0000 | [diff] [blame] | 142 | notify(); |
Constantin Kaplinsky | 30f786a | 2002-05-29 10:59:52 +0000 | [diff] [blame] | 143 | } |
| 144 | |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 145 | public synchronized void setSpeed(double newSpeed) { |
Constantin Kaplinsky | 5a7133a | 2002-07-24 17:02:04 +0000 | [diff] [blame] | 146 | long newOffset = (long)(timeOffset * playbackSpeed / newSpeed); |
| 147 | startTime += timeOffset - newOffset; |
| 148 | timeOffset = newOffset; |
Constantin Kaplinsky | ce39d3b | 2002-05-30 15:54:56 +0000 | [diff] [blame] | 149 | if (isSeeking()) { |
| 150 | seekOffset = (long)(seekOffset * playbackSpeed / newSpeed); |
| 151 | } |
| 152 | playbackSpeed = newSpeed; |
| 153 | } |
| 154 | |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 155 | public boolean isSeeking() { |
Constantin Kaplinsky | 52c4824 | 2002-05-30 13:26:34 +0000 | [diff] [blame] | 156 | return (seekOffset >= 0); |
Constantin Kaplinsky | 30f786a | 2002-05-29 10:59:52 +0000 | [diff] [blame] | 157 | } |
| 158 | |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 159 | public long getSeekOffset() { |
Constantin Kaplinsky | 7cc7762 | 2002-09-22 12:36:20 +0000 | [diff] [blame] | 160 | return (long)(seekOffset * playbackSpeed); |
Constantin Kaplinsky | d8770f6 | 2002-08-16 16:01:37 +0000 | [diff] [blame] | 161 | } |
| 162 | |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 163 | public boolean isPaused() { |
Constantin Kaplinsky | d8770f6 | 2002-08-16 16:01:37 +0000 | [diff] [blame] | 164 | return paused; |
| 165 | } |
| 166 | |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 167 | public synchronized void pausePlayback() { |
Constantin Kaplinsky | ba0c4df | 2002-05-30 12:23:25 +0000 | [diff] [blame] | 168 | paused = true; |
Constantin Kaplinsky | ac6420d | 2002-05-29 17:05:39 +0000 | [diff] [blame] | 169 | notify(); |
Constantin Kaplinsky | 30f786a | 2002-05-29 10:59:52 +0000 | [diff] [blame] | 170 | } |
| 171 | |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 172 | public synchronized void resumePlayback() { |
Constantin Kaplinsky | ba0c4df | 2002-05-30 12:23:25 +0000 | [diff] [blame] | 173 | paused = false; |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 174 | startTime = System.currentTimeMillis() - timeOffset; |
Constantin Kaplinsky | ac6420d | 2002-05-29 17:05:39 +0000 | [diff] [blame] | 175 | notify(); |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 176 | } |
| 177 | |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 178 | public void addObserver(Observer target) { |
Constantin Kaplinsky | 5a7133a | 2002-07-24 17:02:04 +0000 | [diff] [blame] | 179 | obs = target; |
| 180 | } |
| 181 | |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 182 | // |
| 183 | // Methods for internal use. |
| 184 | // |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 185 | private synchronized boolean fillBuffer() throws IOException { |
Constantin Kaplinsky | d8770f6 | 2002-08-16 16:01:37 +0000 | [diff] [blame] | 186 | // The reading thread should be interrupted on backward seeking. |
| 187 | if (seekBackwards) |
| 188 | throw new EOFException("[REWIND]"); |
| 189 | |
| 190 | // Just wait unless we are performing playback OR seeking. |
Constantin Kaplinsky | ac6420d | 2002-05-29 17:05:39 +0000 | [diff] [blame] | 191 | waitWhilePaused(); |
| 192 | |
Constantin Kaplinsky | ab0eaa2 | 2008-06-19 07:51:42 +0000 | [diff] [blame^] | 193 | if (!readDataBlock(0)) { |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 194 | return false; |
| 195 | } |
| 196 | |
Constantin Kaplinsky | 52c4824 | 2002-05-30 13:26:34 +0000 | [diff] [blame] | 197 | if (seekOffset >= 0) { |
| 198 | if (timeOffset >= seekOffset) { |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 199 | startTime = System.currentTimeMillis() - seekOffset; |
| 200 | seekOffset = -1; |
Constantin Kaplinsky | 5a7133a | 2002-07-24 17:02:04 +0000 | [diff] [blame] | 201 | } else { |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 202 | return true; |
Constantin Kaplinsky | 52c4824 | 2002-05-30 13:26:34 +0000 | [diff] [blame] | 203 | } |
Constantin Kaplinsky | 52c4824 | 2002-05-30 13:26:34 +0000 | [diff] [blame] | 204 | } |
| 205 | |
wimba.com | d1f56df | 2004-11-01 16:18:54 +0000 | [diff] [blame] | 206 | while (!isQuitting) { |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 207 | long timeDiff = startTime + timeOffset - System.currentTimeMillis(); |
| 208 | if (timeDiff <= 0) { |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 209 | break; |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 210 | } |
Constantin Kaplinsky | ce39d3b | 2002-05-30 15:54:56 +0000 | [diff] [blame] | 211 | try { |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 212 | wait(timeDiff); |
Constantin Kaplinsky | ce39d3b | 2002-05-30 15:54:56 +0000 | [diff] [blame] | 213 | } catch (InterruptedException e) { |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 214 | } |
Constantin Kaplinsky | ac6420d | 2002-05-29 17:05:39 +0000 | [diff] [blame] | 215 | waitWhilePaused(); |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 216 | } |
| 217 | |
| 218 | return true; |
| 219 | } |
| 220 | |
Constantin Kaplinsky | ab0eaa2 | 2008-06-19 07:51:42 +0000 | [diff] [blame^] | 221 | /** |
| 222 | * Read FBS data block into the buffer. |
| 223 | * |
| 224 | * @param numBytesSkip specifies how many bytes should be skipped in the |
| 225 | * beginning of the data block. |
| 226 | * @return true on success, false if end of file was reached. |
| 227 | * @throws java.io.IOException can be thrown while reading from the |
| 228 | * underlying input stream, or as a result of bad FBS file data. |
| 229 | */ |
| 230 | private boolean readDataBlock(int numBytesSkip) throws IOException { |
| 231 | // Read byte counter, check for EOF condition. |
| 232 | long readResult = readUnsigned32(); |
| 233 | if (readResult < 0) { |
| 234 | return false; |
| 235 | } |
| 236 | |
| 237 | bufferSize = (int)readResult; |
| 238 | if (bufferSize >= 0) { |
| 239 | int alignedSize = (bufferSize + 3) & 0xFFFFFFFC; |
| 240 | buffer = new byte[alignedSize]; |
| 241 | readFully(buffer); |
| 242 | bufferPos = numBytesSkip; |
| 243 | timeOffset = (long)(readUnsigned32() / playbackSpeed); |
| 244 | } |
| 245 | |
| 246 | if (bufferSize < 0 || timeOffset < 0 || bufferPos >= bufferSize) { |
| 247 | buffer = null; |
| 248 | bufferSize = 0; |
| 249 | bufferPos = 0; |
| 250 | throw new IOException("Invalid FBS file data"); |
| 251 | } |
| 252 | |
| 253 | return true; |
| 254 | } |
| 255 | |
Constantin Kaplinsky | ac6420d | 2002-05-29 17:05:39 +0000 | [diff] [blame] | 256 | // |
| 257 | // In paused mode, wait for external notification on this object. |
| 258 | // |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 259 | private void waitWhilePaused() { |
wimba.com | d1f56df | 2004-11-01 16:18:54 +0000 | [diff] [blame] | 260 | while (paused && !isSeeking() && !isQuitting) { |
Constantin Kaplinsky | ac6420d | 2002-05-29 17:05:39 +0000 | [diff] [blame] | 261 | synchronized(this) { |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 262 | try { |
| 263 | // Note: we call Observer.update(Observable,Object) method |
| 264 | // directly instead of maintaining an Observable object. |
| 265 | obs.update(null, null); |
| 266 | wait(); |
| 267 | } catch (InterruptedException e) { |
| 268 | } |
Constantin Kaplinsky | ac6420d | 2002-05-29 17:05:39 +0000 | [diff] [blame] | 269 | } |
| 270 | } |
| 271 | } |
| 272 | |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 273 | private long readUnsigned32() throws IOException { |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 274 | byte[] buf = new byte[4]; |
| 275 | if (!readFully(buf)) |
| 276 | return -1; |
| 277 | |
| 278 | return ((long)(buf[0] & 0xFF) << 24 | |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 279 | (buf[1] & 0xFF) << 16 | |
| 280 | (buf[2] & 0xFF) << 8 | |
| 281 | (buf[3] & 0xFF)); |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 282 | } |
| 283 | |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 284 | private boolean readFully(byte[] b) throws IOException { |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 285 | int off = 0; |
| 286 | int len = b.length; |
| 287 | |
| 288 | while (off != len) { |
| 289 | int count = in.read(b, off, len - off); |
| 290 | if (count < 0) { |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 291 | return false; |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 292 | } |
| 293 | off += count; |
| 294 | } |
| 295 | |
| 296 | return true; |
| 297 | } |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 298 | |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 299 | } |
| 300 | |