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 | |
wimba.com | c23aeb0 | 2004-09-16 00:00:00 +0000 | [diff] [blame] | 24 | package com.HorizonLive.RfbPlayer; |
| 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; |
Constantin Kaplinsky | ce39d3b | 2002-05-30 15:54:56 +0000 | [diff] [blame] | 37 | protected double playbackSpeed; |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 38 | |
| 39 | protected byte[] buffer; |
| 40 | protected int bufferSize; |
| 41 | protected int bufferPos; |
| 42 | |
Constantin Kaplinsky | 5a7133a | 2002-07-24 17:02:04 +0000 | [diff] [blame] | 43 | protected Observer obs; |
| 44 | |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 45 | // |
| 46 | // Constructors. |
| 47 | // |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 48 | FbsInputStream() throws IOException { |
| 49 | throw new IOException("FbsInputStream: no such constructor"); |
| 50 | } |
| 51 | |
Constantin Kaplinsky | ac6420d | 2002-05-29 17:05:39 +0000 | [diff] [blame] | 52 | // |
| 53 | // Construct FbsInputStream object, begin playback. |
| 54 | // |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 55 | FbsInputStream(InputStream in) throws IOException { |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 56 | this.in = in; |
| 57 | startTime = System.currentTimeMillis(); |
| 58 | timeOffset = 0; |
Constantin Kaplinsky | 52c4824 | 2002-05-30 13:26:34 +0000 | [diff] [blame] | 59 | seekOffset = -1; |
Constantin Kaplinsky | d8770f6 | 2002-08-16 16:01:37 +0000 | [diff] [blame] | 60 | seekBackwards = false; |
Constantin Kaplinsky | ba0c4df | 2002-05-30 12:23:25 +0000 | [diff] [blame] | 61 | paused = false; |
Constantin Kaplinsky | ce39d3b | 2002-05-30 15:54:56 +0000 | [diff] [blame] | 62 | playbackSpeed = 1.0; |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 63 | |
| 64 | byte[] b = new byte[12]; |
| 65 | readFully(b); |
| 66 | |
| 67 | if (b[0] != 'F' || b[1] != 'B' || b[2] != 'S' || b[3] != ' ' || |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 68 | b[4] != '0' || b[5] != '0' || b[6] != '1' || b[7] != '.' || |
| 69 | b[8] < '0' || b[8] > '9' || b[9] < '0' || b[9] > '9' || |
| 70 | b[10] < '0' || b[10] > '9' || b[11] != '\n') { |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 71 | throw new IOException("Incorrect protocol version"); |
| 72 | } |
| 73 | |
| 74 | buffer = null; |
| 75 | bufferSize = 0; |
| 76 | bufferPos = 0; |
| 77 | } |
| 78 | |
| 79 | // |
| 80 | // Basic methods overriding InputStream's methods. |
| 81 | // |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 82 | public int read() throws IOException { |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 83 | while (bufferSize == 0) { |
| 84 | if (!fillBuffer()) |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 85 | return -1; |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 86 | } |
| 87 | bufferSize--; |
| 88 | return buffer[bufferPos++] & 0xFF; |
| 89 | } |
| 90 | |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 91 | public int available() throws IOException { |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 92 | // FIXME: This will work incorrectly if our caller will wait until |
| 93 | // some amount of data is available when the buffer contains less |
| 94 | // data than then that. Current implementation never reads more |
| 95 | // data until the buffer is fully exhausted. |
| 96 | return bufferSize; |
| 97 | } |
| 98 | |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 99 | public synchronized void close() throws IOException { |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 100 | in.close(); |
| 101 | in = null; |
Constantin Kaplinsky | ac6420d | 2002-05-29 17:05:39 +0000 | [diff] [blame] | 102 | startTime = -1; |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 103 | timeOffset = 0; |
Constantin Kaplinsky | 52c4824 | 2002-05-30 13:26:34 +0000 | [diff] [blame] | 104 | seekOffset = -1; |
Constantin Kaplinsky | d8770f6 | 2002-08-16 16:01:37 +0000 | [diff] [blame] | 105 | seekBackwards = false; |
Constantin Kaplinsky | ba0c4df | 2002-05-30 12:23:25 +0000 | [diff] [blame] | 106 | paused = false; |
Constantin Kaplinsky | ce39d3b | 2002-05-30 15:54:56 +0000 | [diff] [blame] | 107 | playbackSpeed = 1.0; |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 108 | |
| 109 | buffer = null; |
| 110 | bufferSize = 0; |
| 111 | bufferPos = 0; |
Constantin Kaplinsky | 5a7133a | 2002-07-24 17:02:04 +0000 | [diff] [blame] | 112 | |
| 113 | obs = null; |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 114 | } |
| 115 | |
| 116 | // |
| 117 | // Methods providing additional functionality. |
| 118 | // |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 119 | public synchronized long getTimeOffset() { |
Constantin Kaplinsky | 5a7133a | 2002-07-24 17:02:04 +0000 | [diff] [blame] | 120 | long off = Math.max(seekOffset, timeOffset); |
| 121 | return (long)(off * playbackSpeed); |
Constantin Kaplinsky | fe07983 | 2002-05-29 00:52:32 +0000 | [diff] [blame] | 122 | } |
| 123 | |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 124 | public synchronized void setTimeOffset(long pos) { |
Constantin Kaplinsky | ce39d3b | 2002-05-30 15:54:56 +0000 | [diff] [blame] | 125 | seekOffset = (long)(pos / playbackSpeed); |
Constantin Kaplinsky | d8770f6 | 2002-08-16 16:01:37 +0000 | [diff] [blame] | 126 | if (seekOffset < timeOffset) { |
| 127 | seekBackwards = true; |
| 128 | } |
Constantin Kaplinsky | 52c4824 | 2002-05-30 13:26:34 +0000 | [diff] [blame] | 129 | notify(); |
Constantin Kaplinsky | 30f786a | 2002-05-29 10:59:52 +0000 | [diff] [blame] | 130 | } |
| 131 | |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 132 | public synchronized void setSpeed(double newSpeed) { |
Constantin Kaplinsky | 5a7133a | 2002-07-24 17:02:04 +0000 | [diff] [blame] | 133 | long newOffset = (long)(timeOffset * playbackSpeed / newSpeed); |
| 134 | startTime += timeOffset - newOffset; |
| 135 | timeOffset = newOffset; |
Constantin Kaplinsky | ce39d3b | 2002-05-30 15:54:56 +0000 | [diff] [blame] | 136 | if (isSeeking()) { |
| 137 | seekOffset = (long)(seekOffset * playbackSpeed / newSpeed); |
| 138 | } |
| 139 | playbackSpeed = newSpeed; |
| 140 | } |
| 141 | |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 142 | public boolean isSeeking() { |
Constantin Kaplinsky | 52c4824 | 2002-05-30 13:26:34 +0000 | [diff] [blame] | 143 | return (seekOffset >= 0); |
Constantin Kaplinsky | 30f786a | 2002-05-29 10:59:52 +0000 | [diff] [blame] | 144 | } |
| 145 | |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 146 | public long getSeekOffset() { |
Constantin Kaplinsky | 7cc7762 | 2002-09-22 12:36:20 +0000 | [diff] [blame] | 147 | return (long)(seekOffset * playbackSpeed); |
Constantin Kaplinsky | d8770f6 | 2002-08-16 16:01:37 +0000 | [diff] [blame] | 148 | } |
| 149 | |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 150 | public boolean isPaused() { |
Constantin Kaplinsky | d8770f6 | 2002-08-16 16:01:37 +0000 | [diff] [blame] | 151 | return paused; |
| 152 | } |
| 153 | |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 154 | public synchronized void pausePlayback() { |
Constantin Kaplinsky | ba0c4df | 2002-05-30 12:23:25 +0000 | [diff] [blame] | 155 | paused = true; |
Constantin Kaplinsky | ac6420d | 2002-05-29 17:05:39 +0000 | [diff] [blame] | 156 | notify(); |
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 synchronized void resumePlayback() { |
Constantin Kaplinsky | ba0c4df | 2002-05-30 12:23:25 +0000 | [diff] [blame] | 160 | paused = false; |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 161 | startTime = System.currentTimeMillis() - timeOffset; |
Constantin Kaplinsky | ac6420d | 2002-05-29 17:05:39 +0000 | [diff] [blame] | 162 | notify(); |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 163 | } |
| 164 | |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 165 | public void addObserver(Observer target) { |
Constantin Kaplinsky | 5a7133a | 2002-07-24 17:02:04 +0000 | [diff] [blame] | 166 | obs = target; |
| 167 | } |
| 168 | |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 169 | // |
| 170 | // Methods for internal use. |
| 171 | // |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 172 | private synchronized boolean fillBuffer() throws IOException { |
Constantin Kaplinsky | d8770f6 | 2002-08-16 16:01:37 +0000 | [diff] [blame] | 173 | // The reading thread should be interrupted on backward seeking. |
| 174 | if (seekBackwards) |
| 175 | throw new EOFException("[REWIND]"); |
| 176 | |
| 177 | // Just wait unless we are performing playback OR seeking. |
Constantin Kaplinsky | ac6420d | 2002-05-29 17:05:39 +0000 | [diff] [blame] | 178 | waitWhilePaused(); |
| 179 | |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 180 | bufferSize = (int)readUnsigned32(); |
| 181 | if (bufferSize >= 0) { |
| 182 | int realSize = (bufferSize + 3) & 0xFFFFFFFC; |
| 183 | buffer = new byte[realSize]; |
| 184 | readFully(buffer); |
| 185 | bufferPos = 0; |
Constantin Kaplinsky | ce39d3b | 2002-05-30 15:54:56 +0000 | [diff] [blame] | 186 | timeOffset = (long)(readUnsigned32() / playbackSpeed); |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 187 | } |
| 188 | |
| 189 | if (bufferSize < 0 || timeOffset < 0) { |
| 190 | buffer = null; |
| 191 | bufferSize = 0; |
| 192 | bufferPos = 0; |
| 193 | return false; |
| 194 | } |
| 195 | |
Constantin Kaplinsky | 52c4824 | 2002-05-30 13:26:34 +0000 | [diff] [blame] | 196 | if (seekOffset >= 0) { |
| 197 | if (timeOffset >= seekOffset) { |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 198 | startTime = System.currentTimeMillis() - seekOffset; |
| 199 | seekOffset = -1; |
Constantin Kaplinsky | 5a7133a | 2002-07-24 17:02:04 +0000 | [diff] [blame] | 200 | } else { |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 201 | return true; |
Constantin Kaplinsky | 52c4824 | 2002-05-30 13:26:34 +0000 | [diff] [blame] | 202 | } |
Constantin Kaplinsky | 52c4824 | 2002-05-30 13:26:34 +0000 | [diff] [blame] | 203 | } |
| 204 | |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 205 | while (true) { |
| 206 | long timeDiff = startTime + timeOffset - System.currentTimeMillis(); |
| 207 | if (timeDiff <= 0) { |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 208 | break; |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 209 | } |
Constantin Kaplinsky | ce39d3b | 2002-05-30 15:54:56 +0000 | [diff] [blame] | 210 | try { |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 211 | wait(timeDiff); |
Constantin Kaplinsky | ce39d3b | 2002-05-30 15:54:56 +0000 | [diff] [blame] | 212 | } catch (InterruptedException e) { |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 213 | } |
Constantin Kaplinsky | ac6420d | 2002-05-29 17:05:39 +0000 | [diff] [blame] | 214 | waitWhilePaused(); |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 215 | } |
| 216 | |
| 217 | return true; |
| 218 | } |
| 219 | |
Constantin Kaplinsky | ac6420d | 2002-05-29 17:05:39 +0000 | [diff] [blame] | 220 | // |
| 221 | // In paused mode, wait for external notification on this object. |
| 222 | // |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 223 | private void waitWhilePaused() { |
Constantin Kaplinsky | 52c4824 | 2002-05-30 13:26:34 +0000 | [diff] [blame] | 224 | while (paused && !isSeeking()) { |
Constantin Kaplinsky | ac6420d | 2002-05-29 17:05:39 +0000 | [diff] [blame] | 225 | synchronized(this) { |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 226 | try { |
| 227 | // Note: we call Observer.update(Observable,Object) method |
| 228 | // directly instead of maintaining an Observable object. |
| 229 | obs.update(null, null); |
| 230 | wait(); |
| 231 | } catch (InterruptedException e) { |
| 232 | } |
Constantin Kaplinsky | ac6420d | 2002-05-29 17:05:39 +0000 | [diff] [blame] | 233 | } |
| 234 | } |
| 235 | } |
| 236 | |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 237 | private long readUnsigned32() throws IOException { |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 238 | byte[] buf = new byte[4]; |
| 239 | if (!readFully(buf)) |
| 240 | return -1; |
| 241 | |
| 242 | return ((long)(buf[0] & 0xFF) << 24 | |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 243 | (buf[1] & 0xFF) << 16 | |
| 244 | (buf[2] & 0xFF) << 8 | |
| 245 | (buf[3] & 0xFF)); |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 246 | } |
| 247 | |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 248 | private boolean readFully(byte[] b) throws IOException { |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 249 | int off = 0; |
| 250 | int len = b.length; |
| 251 | |
| 252 | while (off != len) { |
| 253 | int count = in.read(b, off, len - off); |
| 254 | if (count < 0) { |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 255 | return false; |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 256 | } |
| 257 | off += count; |
| 258 | } |
| 259 | |
| 260 | return true; |
| 261 | } |
Constantin Kaplinsky | 72e47ef | 2008-04-18 17:48:16 +0000 | [diff] [blame] | 262 | |
Constantin Kaplinsky | 903009e | 2002-05-20 10:55:47 +0000 | [diff] [blame] | 263 | } |
| 264 | |