1 | package org.apollo.io;
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2 |
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3 | import java.io.BufferedReader;
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4 | import java.io.File;
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5 | import java.io.FileReader;
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6 | import java.io.FileWriter;
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7 | import java.io.IOException;
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8 | import java.io.UnsupportedEncodingException;
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9 | import java.util.Random;
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10 |
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11 | import org.apollo.audio.structure.AudioStructureModel;
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12 | import org.apollo.util.ApolloSystemLog;
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13 | import org.apollo.util.RegExpFileFilter;
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14 | import org.expeditee.auth.AuthenticatorBrowser;
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15 | import org.expeditee.gui.FrameIO;
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16 | import org.expeditee.settings.UserSettings;
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17 |
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18 | /**
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19 | * Generates audio paths.
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20 | *
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21 | * @author Brook Novak
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22 | *
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23 | */
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24 | public class AudioPathManager {
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25 |
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26 | private AudioPathManager() {
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27 | // util constructor
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28 | }
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29 |
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30 | /** Suffixed with the native file separator */
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31 | public static String AUDIO_HOME_DIRECTORY = null;
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32 |
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33 | /** Stores all virtual names created by this repository. */
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34 | private static final String VIRTUAL_NAME_BASEFILE = ".vnames";
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35 |
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36 | public static final int PREAMBLE_LENGTH = 6;
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37 |
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38 | private static long counter = 0;
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39 |
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40 | private static Random rand = new Random(System.currentTimeMillis());
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41 |
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42 | // **** DB
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43 | // Some work to be done here => remove dependency in code on 'AUDIO_HOME_DIRECTORY'
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44 | // and change it to use audio dir list from UserSettings
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45 | public static void changeParentAndSubFolders(String newFolder) {
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46 |
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47 | if (AuthenticatorBrowser.isAuthenticationRequired() && System.getProperty("user.name").equals(AuthenticatorBrowser.USER_NOBODY)) {
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48 | System.err.println("**** AudioPathManager::changeParentAndSubFolder(): Nothing to do for user '" + AuthenticatorBrowser.USER_NOBODY + "'");
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49 | return;
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50 | }
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51 |
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52 | if (UserSettings.PublicAndPrivateResources) {
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53 | //String resourcesPublicPath = FrameIO.PARENT_FOLDER + "resources-public" + File.separator;
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54 | String userName = UserSettings.UserName.get();
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55 | //String resourcesPrivateIndividualPath = FrameIO.PARENT_FOLDER + "resources-" + userName + File.separator;
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56 | if (AuthenticatorBrowser.isAuthenticationRequired()) {
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57 | System.err.println("**** AudioPathManager::changeParentAndSubFolder(): Setting 'audio' folder to resources-" + userName);
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58 | }
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59 | //AUDIO_HOME_DIRECTORY = resourcesPrivateIndividualPath + "audio" + File.separatorChar;
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60 | AUDIO_HOME_DIRECTORY = FrameIO.AUDIO_PRIVATE_PATH;
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61 | }
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62 | else {
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63 | AUDIO_HOME_DIRECTORY = FrameIO.PARENT_FOLDER + "audio" + File.separatorChar;;
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64 | }
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65 | }
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66 |
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67 | public static void activateAndScanAudioDir()
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68 | {
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69 | changeParentAndSubFolders(FrameIO.PARENT_FOLDER);
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70 |
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71 | // Ensure audio directory exists
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72 | File dir = new File(AUDIO_HOME_DIRECTORY);
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73 | if (!dir.exists()) {
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74 | if (!dir.mkdir()) {
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75 | ApolloSystemLog.println("Unable to create missing audio home directory");
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76 | }
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77 | }
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78 |
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79 | // Load counter
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80 | loadCounter(AUDIO_HOME_DIRECTORY);
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81 | }
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82 |
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83 |
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84 | /**
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85 | * Loads the counter
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86 | * @param dir The dir where the audio files live.
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87 | */
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88 | private static void loadCounter(String audio_dir_str) {
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89 | File audio_dir = new File(audio_dir_str);
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90 |
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91 | String[] files = getAudioFileNames(audio_dir);
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92 | if (files == null) { // Due to IO exception
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93 | ApolloSystemLog.printError("Failed to read audio directory");
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94 | return;
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95 | }
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96 | long count = 0;
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97 | if (files != null) {
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98 | for (String f : files) {
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99 |
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100 | int start = -1, end = -1;
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101 | for (int i = 0; i < f.length(); i++) {
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102 | if (Character.isDigit(f.charAt(i)) && start == -1) {
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103 | start = i;
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104 | } else if (!Character.isDigit(f.charAt(i)) && start != -1) {
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105 | end = i;
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106 | break;
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107 | }
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108 | }
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109 |
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110 | if (start >= 0 && end == -1) {
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111 | end = f.length();
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112 | }
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113 |
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114 | if (start > 0 && end >= start) { // not start >= 0 since missing preable
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115 |
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116 | String tmp = f.substring(start, end);
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117 | long l = Long.parseLong(tmp);
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118 | if (l >= count)
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119 | count = l + 1;
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120 | }
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121 | }
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122 | }
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123 |
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124 | counter = count;
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125 | }
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126 |
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127 | /**
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128 | * @param dir
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129 | * @return
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130 | * Null if an IO exception occurs
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131 | */
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132 | private static String[] getAudioFileNames(File dir) {
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133 | return dir.list(new RegExpFileFilter("^[A-Z]+\\d+.*$"));
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134 | }
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135 |
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136 | /**
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137 | * @return
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138 | * The list of audio files in the audio home directory.
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139 | * Can be empty. Null if directory does not exist or failed to
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140 | * read list of files.
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141 | */
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142 | public static String[] getAudioFileNames() {
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143 | File audioDir = new File(AUDIO_HOME_DIRECTORY);
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144 | if (!audioDir.exists() || !audioDir.isDirectory()) return null;
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145 | return getAudioFileNames(audioDir);
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146 | }
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147 |
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148 |
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149 | /**
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150 | * @return The current counter.
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151 | */
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152 | public static long getCounter() {
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153 | return counter;
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154 | }
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155 |
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156 | /**
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157 | * Generates a filename that is unique within the AUDIO_HOME_DIRECTORY.
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158 | *
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159 | * @param extension
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160 | * The extension of the filename to generate. Exclude period.
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161 | *
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162 | * @return
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163 | * A free unused filename with the given extension. Excludes directory.
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164 | * Even if the path return is not used, it will never be re-generated.
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165 | */
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166 | public static String generateLocateFileName(String extension) {
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167 |
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168 | String filename = generateRandomFilenameBase() + "." + extension;
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169 |
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170 | File f = new File(AUDIO_HOME_DIRECTORY + filename);
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171 |
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172 | if (AudioStructureModel.getInstance().getTrackGraphInfo(filename, null) != null ||
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173 | f.exists()) { // recurse: until found a free path:
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174 | return generateLocateFileName(extension);
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175 | }
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176 |
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177 | return filename;
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178 | }
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179 |
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180 | private static String generateRandomFilenameBase() {
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181 |
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182 | counter++;
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183 | if (counter < 0) counter = 0; // wraps positivey
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184 |
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185 | // Generate random alpha preamble
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186 | byte[] bytes = new byte[PREAMBLE_LENGTH];
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187 | rand.nextBytes(bytes);
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188 |
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189 |
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190 | for (int i = 0; i < PREAMBLE_LENGTH; i++) {
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191 | if (bytes[i] < 0) bytes[i] *= -1;
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192 | int alphacap = (65 + (Math.abs(bytes[i]) % 26)); // A-Z in US ASCII encoding
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193 | bytes[i] = (byte) alphacap;
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194 |
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195 | }
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196 |
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197 | // Decode ASCII Byte array to javas UTF-16 encoding
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198 | String preamble = null;
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199 |
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200 | try {
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201 | preamble = new String(bytes, "US-ASCII");
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202 | } catch (UnsupportedEncodingException e) {
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203 | e.printStackTrace();
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204 | preamble = "AUDIO";
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205 | }
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206 |
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207 | // Build the filename string
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208 | return preamble + counter;
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209 |
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210 | }
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211 |
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212 |
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213 |
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214 | /**
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215 | * Lots of room for improvement here, ensures that a virtual filename is unique .. stores
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216 | * allocated virtual filenames on file.
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217 | *
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218 | * @return
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219 | * The new virtual filename.
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220 | */
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221 | public static String generateVirtualFilename() {
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222 |
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223 | // Ensure that the name base file exists. Assumes the audio home directory exists.
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224 | File vnameBase = new File(AUDIO_HOME_DIRECTORY + VIRTUAL_NAME_BASEFILE);
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225 | if (!vnameBase.exists()) {
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226 | try {
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227 | vnameBase.createNewFile();
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228 | } catch (IOException e) {
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229 | e.printStackTrace();
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230 | }
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231 | }
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232 |
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233 | String vname = null;
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234 |
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235 | while (vname == null) {
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236 | vname = generateRandomFilenameBase() + ".vrt";
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237 | assert(vname != null);
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238 |
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239 | BufferedReader in = null;
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240 | String line = null;
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241 |
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242 | try {
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243 |
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244 | // Open the vbase for reading
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245 | in = new BufferedReader(new FileReader(vnameBase));
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246 |
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247 | // Read the sbase file and check all names
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248 | while ((line = in.readLine()) != null) {
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249 | line = line.trim();
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250 | if (line.equalsIgnoreCase(vname)) break;
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251 | }
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252 |
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253 | } catch (Exception e) {
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254 | e.printStackTrace();
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255 | break; // just use the last generated filename...
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256 |
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257 | // Clean up
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258 | } finally {
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259 | if (in != null) {
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260 | try {
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261 | in.close();
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262 | } catch (IOException e) {
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263 | e.printStackTrace();
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264 | }
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265 | }
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266 | }
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267 |
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268 | // Check to see if name is infact unique
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269 | if (AudioStructureModel.getInstance().getLinkedTrackGraphInfo(vname, null) == null &&
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270 | (line == null || !line.equalsIgnoreCase(vname))) {
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271 | // If so, then enter new entry into the db.
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272 | FileWriter out = null;
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273 |
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274 | try {
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275 | // Open the vbase for appending
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276 | out = new FileWriter(vnameBase, true);
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277 | out.write("\n" + vname);
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278 |
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279 | } catch (IOException e) {
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280 | e.printStackTrace();
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281 |
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282 | // Clean up
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283 | } finally {
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284 | if (out != null) {
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285 | try {
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286 | out.close();
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287 | } catch (IOException e) {
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288 | e.printStackTrace();
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289 | }
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290 | }
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291 | }
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292 |
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293 | } else vname = null;
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294 | }
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295 |
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296 | // Return the generated vname
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297 | return vname;
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298 |
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299 | }
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300 | }
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