1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.io.audio;
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3 |
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4 | import java.io.IOException;
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5 | import java.net.URL;
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6 |
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7 | import org.openstreetmap.josm.spi.preferences.Config;
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8 | import org.openstreetmap.josm.tools.JosmRuntimeException;
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9 | import org.openstreetmap.josm.tools.Logging;
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10 |
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11 | /**
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12 | * Creates and controls a separate audio player thread.
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13 | *
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14 | * @author David Earl <david@frankieandshadow.com>
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15 | * @since 12326 (move to new package)
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16 | * @since 547
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17 | */
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18 | public final class AudioPlayer extends Thread implements AudioListener {
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19 |
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20 | private static volatile AudioPlayer audioPlayer;
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21 |
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22 | /**
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23 | * Audio player state.
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24 | */
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25 | public enum State {
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26 | /** Initializing */
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27 | INITIALIZING,
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28 | /** Not playing */
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29 | NOTPLAYING,
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30 | /** Playing */
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31 | PLAYING,
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32 | /** Paused */
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33 | PAUSED,
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34 | /** Interrupted */
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35 | INTERRUPTED
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36 | }
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37 |
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38 | /**
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39 | * Audio player command.
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40 | */
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41 | public enum Command { /** Audio play */ PLAY, /** Audio pause */ PAUSE }
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42 |
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43 | /**
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44 | * Audio player result.
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45 | */
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46 | public enum Result { /** In progress */ WAITING, /** Success */ OK, /** Failure */ FAILED }
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47 |
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48 | private State state;
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49 | private SoundPlayer soundPlayer;
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50 | private URL playingUrl;
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51 |
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52 | /**
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53 | * Passes information from the control thread to the playing thread
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54 | */
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55 | public class Execute {
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56 | private Command command;
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57 | private Result result;
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58 | private Exception exception;
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59 | private URL url;
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60 | private double offset; // seconds
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61 | private double speed; // ratio
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62 |
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63 | /*
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64 | * Called to execute the commands in the other thread
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65 | */
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66 | protected void play(URL url, double offset, double speed) throws InterruptedException, IOException {
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67 | this.url = url;
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68 | this.offset = offset;
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69 | this.speed = speed;
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70 | command = Command.PLAY;
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71 | result = Result.WAITING;
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72 | send();
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73 | }
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74 |
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75 | protected void pause() throws InterruptedException, IOException {
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76 | command = Command.PAUSE;
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77 | send();
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78 | }
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79 |
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80 | private void send() throws InterruptedException, IOException {
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81 | result = Result.WAITING;
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82 | interrupt();
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83 | while (result == Result.WAITING) {
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84 | sleep(10);
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85 | }
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86 | if (result == Result.FAILED)
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87 | throw new IOException(exception);
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88 | }
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89 |
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90 | protected void possiblyInterrupt() throws InterruptedException {
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91 | if (interrupted() || result == Result.WAITING)
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92 | throw new InterruptedException();
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93 | }
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94 |
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95 | protected void failed(Exception e) {
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96 | exception = e;
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97 | result = Result.FAILED;
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98 | state = State.NOTPLAYING;
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99 | }
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100 |
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101 | protected void ok(State newState) {
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102 | result = Result.OK;
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103 | state = newState;
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104 | }
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105 |
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106 | /**
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107 | * Returns the offset.
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108 | * @return the offset, in seconds
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109 | */
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110 | public double offset() {
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111 | return offset;
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112 | }
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113 |
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114 | /**
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115 | * Returns the speed.
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116 | * @return the speed (ratio)
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117 | */
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118 | public double speed() {
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119 | return speed;
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120 | }
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121 |
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122 | /**
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123 | * Returns the URL.
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124 | * @return The resource to play, which must be a WAV file or stream
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125 | */
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126 | public URL url() {
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127 | return url;
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128 | }
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129 |
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130 | /**
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131 | * Returns the command.
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132 | * @return the command
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133 | */
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134 | public Command command() {
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135 | return command;
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136 | }
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137 | }
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138 |
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139 | private final Execute command;
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140 |
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141 | /**
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142 | * Plays a WAV audio file from the beginning. See also the variant which doesn't
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143 | * start at the beginning of the stream
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144 | * @param url The resource to play, which must be a WAV file or stream
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145 | * @throws InterruptedException thread interrupted
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146 | * @throws IOException audio fault exception, e.g. can't open stream, unhandleable audio format
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147 | */
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148 | public static void play(URL url) throws InterruptedException, IOException {
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149 | AudioPlayer instance = AudioPlayer.getInstance();
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150 | if (instance != null)
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151 | instance.command.play(url, 0.0, 1.0);
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152 | }
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153 |
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154 | /**
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155 | * Plays a WAV audio file from a specified position.
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156 | * @param url The resource to play, which must be a WAV file or stream
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157 | * @param seconds The number of seconds into the audio to start playing
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158 | * @throws InterruptedException thread interrupted
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159 | * @throws IOException audio fault exception, e.g. can't open stream, unhandleable audio format
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160 | */
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161 | public static void play(URL url, double seconds) throws InterruptedException, IOException {
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162 | AudioPlayer instance = AudioPlayer.getInstance();
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163 | if (instance != null)
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164 | instance.command.play(url, seconds, 1.0);
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165 | }
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166 |
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167 | /**
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168 | * Plays a WAV audio file from a specified position at variable speed.
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169 | * @param url The resource to play, which must be a WAV file or stream
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170 | * @param seconds The number of seconds into the audio to start playing
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171 | * @param speed Rate at which audio playes (1.0 = real time, > 1 is faster)
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172 | * @throws InterruptedException thread interrupted
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173 | * @throws IOException audio fault exception, e.g. can't open stream, unhandleable audio format
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174 | */
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175 | public static void play(URL url, double seconds, double speed) throws InterruptedException, IOException {
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176 | AudioPlayer instance = AudioPlayer.getInstance();
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177 | if (instance != null)
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178 | instance.command.play(url, seconds, speed);
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179 | }
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180 |
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181 | /**
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182 | * Pauses the currently playing audio stream. Does nothing if nothing playing.
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183 | * @throws InterruptedException thread interrupted
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184 | * @throws IOException audio fault exception, e.g. can't open stream, unhandleable audio format
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185 | */
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186 | public static void pause() throws InterruptedException, IOException {
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187 | AudioPlayer instance = AudioPlayer.getInstance();
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188 | if (instance != null)
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189 | instance.command.pause();
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190 | }
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191 |
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192 | /**
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193 | * To get the Url of the playing or recently played audio.
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194 | * @return url - could be null
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195 | */
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196 | public static URL url() {
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197 | AudioPlayer instance = AudioPlayer.getInstance();
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198 | return instance == null ? null : instance.playingUrl;
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199 | }
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200 |
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201 | /**
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202 | * Whether or not we are paused.
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203 | * @return boolean whether or not paused
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204 | */
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205 | public static boolean paused() {
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206 | AudioPlayer instance = AudioPlayer.getInstance();
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207 | return instance != null && instance.state == State.PAUSED;
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208 | }
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209 |
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210 | /**
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211 | * Whether or not we are playing.
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212 | * @return boolean whether or not playing
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213 | */
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214 | public static boolean playing() {
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215 | AudioPlayer instance = AudioPlayer.getInstance();
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216 | return instance != null && instance.state == State.PLAYING;
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217 | }
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218 |
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219 | /**
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220 | * How far we are through playing, in seconds.
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221 | * @return double seconds
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222 | */
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223 | public static double position() {
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224 | AudioPlayer instance = AudioPlayer.getInstance();
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225 | return instance == null ? -1 : instance.soundPlayer.position();
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226 | }
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227 |
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228 | /**
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229 | * Speed at which we will play.
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230 | * @return double, speed multiplier
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231 | */
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232 | public static double speed() {
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233 | AudioPlayer instance = AudioPlayer.getInstance();
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234 | return instance == null ? -1 : instance.soundPlayer.speed();
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235 | }
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236 |
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237 | /**
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238 | * Returns the singleton object, and if this is the first time, creates it along with
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239 | * the thread to support audio
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240 | * @return the unique instance
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241 | */
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242 | private static AudioPlayer getInstance() {
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243 | if (audioPlayer != null)
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244 | return audioPlayer;
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245 | try {
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246 | audioPlayer = new AudioPlayer();
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247 | return audioPlayer;
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248 | } catch (JosmRuntimeException | IllegalArgumentException | IllegalStateException ex) {
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249 | Logging.error(ex);
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250 | return null;
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251 | }
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252 | }
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253 |
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254 | /**
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255 | * Resets the audio player.
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256 | */
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257 | public static void reset() {
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258 | if (audioPlayer != null) {
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259 | try {
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260 | pause();
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261 | } catch (InterruptedException | IOException e) {
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262 | Logging.warn(e);
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263 | }
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264 | audioPlayer.playingUrl = null;
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265 | }
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266 | }
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267 |
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268 | private AudioPlayer() {
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269 | state = State.INITIALIZING;
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270 | command = new Execute();
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271 | playingUrl = null;
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272 | double leadIn = Config.getPref().getDouble("audio.leadin", 1.0 /* default, seconds */);
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273 | double calibration = Config.getPref().getDouble("audio.calibration", 1.0 /* default, ratio */);
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274 | try {
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275 | soundPlayer = (SoundPlayer) Class.forName("org.openstreetmap.josm.io.audio.fx.JavaFxMediaPlayer")
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276 | .getDeclaredConstructor().newInstance();
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277 | } catch (ReflectiveOperationException | IllegalArgumentException | SecurityException e) {
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278 | Logging.debug(e);
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279 | Logging.warn("JOSM compiled without Java FX support. Falling back to Java Sound API");
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280 | } catch (NoClassDefFoundError | JosmRuntimeException e) {
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281 | Logging.debug(e);
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282 | Logging.warn("Java FX is unavailable. Falling back to Java Sound API");
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283 | }
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284 | if (soundPlayer == null) {
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285 | soundPlayer = new JavaSoundPlayer(leadIn, calibration);
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286 | }
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287 | soundPlayer.addAudioListener(this);
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288 | start();
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289 | while (state == State.INITIALIZING) {
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290 | yield();
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291 | }
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292 | }
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293 |
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294 | /**
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295 | * Starts the thread to actually play the audio, per Thread interface
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296 | * Not to be used as public, though Thread interface doesn't allow it to be made private
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297 | */
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298 | @Override
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299 | public void run() {
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300 | /* code running in separate thread */
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301 |
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302 | playingUrl = null;
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303 |
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304 | for (;;) {
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305 | try {
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306 | switch (state) {
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307 | case INITIALIZING:
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308 | // we're ready to take interrupts
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309 | state = State.NOTPLAYING;
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310 | break;
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311 | case NOTPLAYING:
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312 | case PAUSED:
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313 | sleep(200);
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314 | break;
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315 | case PLAYING:
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316 | command.possiblyInterrupt();
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317 | if (soundPlayer.playing(command)) {
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318 | playingUrl = null;
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319 | state = State.NOTPLAYING;
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320 | }
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321 | command.possiblyInterrupt();
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322 | break;
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323 | default: // Do nothing
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324 | }
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325 | } catch (InterruptedException e) {
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326 | interrupted(); // just in case we get an interrupt
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327 | State stateChange = state;
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328 | state = State.INTERRUPTED;
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329 | try {
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330 | switch (command.command()) {
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331 | case PLAY:
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332 | soundPlayer.play(command, stateChange, playingUrl);
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333 | stateChange = State.PLAYING;
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334 | break;
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335 | case PAUSE:
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336 | soundPlayer.pause(command, stateChange, playingUrl);
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337 | stateChange = State.PAUSED;
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338 | break;
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339 | default: // Do nothing
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340 | }
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341 | command.ok(stateChange);
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342 | } catch (AudioException | IOException | SecurityException | IllegalArgumentException startPlayingException) {
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343 | Logging.error(startPlayingException);
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344 | command.failed(startPlayingException); // sets state
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345 | }
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346 | } catch (AudioException | IOException e) {
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347 | state = State.NOTPLAYING;
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348 | Logging.error(e);
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349 | }
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350 | }
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351 | }
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352 |
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353 | @Override
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354 | public void playing(URL playingUrl) {
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355 | this.playingUrl = playingUrl;
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356 | }
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357 | }
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