| 1 | /** |
| 2 | * GNU MediaGoblin -- federated, autonomous media hosting |
| 3 | * Copyright (C) 2011, 2012 MediaGoblin contributors. See AUTHORS. |
| 4 | * |
| 5 | * This program is free software: you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU Affero General Public License as published by |
| 7 | * the Free Software Foundation, either version 3 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU Affero General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU Affero General Public License |
| 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 17 | */ |
| 18 | |
| 19 | var audioPlayer = new Object(); |
| 20 | |
| 21 | (function (audioPlayer) { |
| 22 | audioPlayer.init = function (audioElement) { |
| 23 | audioPlayer.audioElement = audioElement; |
| 24 | |
| 25 | console.log(audioElement); |
| 26 | |
| 27 | attachEvents(); |
| 28 | |
| 29 | $(audioElement).hide(); |
| 30 | }; |
| 31 | |
| 32 | function attachEvents () { |
| 33 | audioPlayer.audioElement.addEventListener( |
| 34 | 'durationchange', audioPlayer.durationChange, true); |
| 35 | audioPlayer.audioElement.addEventListener( |
| 36 | 'timeupdate', audioPlayer.timeUpdate, true); |
| 37 | audioPlayer.audioElement.addEventListener( |
| 38 | 'progress', audioPlayer.onProgress, true); |
| 39 | audioPlayer.audioElement.addEventListener( |
| 40 | 'ended', audioPlayer.onEnded, true); |
| 41 | |
| 42 | $(document).ready( function () { |
| 43 | $('.audio-spectrogram').delegate( |
| 44 | '.seekbar', 'click', audioPlayer.onSeek); |
| 45 | $('.audio-spectrogram').delegate( |
| 46 | '.audio-control-play-pause', 'click', audioPlayer.playPause); |
| 47 | $('.audio-spectrogram').delegate( |
| 48 | '.audio-volume', 'change', audioPlayer.onVolumeChange); |
| 49 | $('.audio-media').delegate( |
| 50 | '.audio-spectrogram', 'attachedControls', |
| 51 | audioPlayer.onControlsAttached); |
| 52 | }); |
| 53 | } |
| 54 | |
| 55 | audioPlayer.onVolumeChange = function(e) { |
| 56 | console.log('volume change', e); |
| 57 | audioPlayer.audioElement.volume = e.target.value; |
| 58 | } |
| 59 | |
| 60 | audioPlayer.onControlsAttached = function(e) { |
| 61 | console.log('Controls attached', e); |
| 62 | $('.audio-spectrogram .audio-volume').val( |
| 63 | Math.round(audioPlayer.audioElement.volume, 2)); |
| 64 | } |
| 65 | |
| 66 | audioPlayer.onProgress = function(e) { |
| 67 | /** |
| 68 | * Handler for file download progress |
| 69 | */ |
| 70 | console.log(e); |
| 71 | |
| 72 | var buffered = audioPlayer.audioElement.buffered; |
| 73 | |
| 74 | ranges = new Array(); |
| 75 | |
| 76 | var indicators = $('.audio-spectrogram .buffered-indicators div'); |
| 77 | |
| 78 | for (var i = 0; i < buffered.length; i++) { |
| 79 | if (!(i in indicators)) { |
| 80 | $('<div style="display: none;"></div>') |
| 81 | .appendTo($('.audio-spectrogram .buffered-indicators')) |
| 82 | .fadeIn(500); |
| 83 | indicators = $('.audio-spectrogram .buffered-indicators div'); |
| 84 | } |
| 85 | var posStart = ((buffered.start(i) / audioPlayer.audioElement.duration) |
| 86 | * audioPlayer.imageElement.width()); |
| 87 | var posStop = ((buffered.end(i) / audioPlayer.audioElement.duration) |
| 88 | * audioPlayer.imageElement.width()); |
| 89 | console.log('indicators', indicators); |
| 90 | |
| 91 | var indicator = $(indicators[i]); |
| 92 | |
| 93 | indicator.css('left', posStart); |
| 94 | indicator.css('width', posStop - posStart); |
| 95 | } |
| 96 | |
| 97 | /* |
| 98 | * Clean up unused indicators |
| 99 | */ |
| 100 | if (indicators.length > buffered.length) { |
| 101 | for (var i = buffered.length; i < indicators.length; i++) { |
| 102 | $(indicators[i]).fadeOut(500, function () { |
| 103 | this.remove(); |
| 104 | }); |
| 105 | } |
| 106 | } |
| 107 | }; |
| 108 | |
| 109 | audioPlayer.onSeek = function (e) { |
| 110 | /** |
| 111 | * Callback handler for seek event, which is a .click() event on the |
| 112 | * .seekbar element |
| 113 | */ |
| 114 | console.log('onSeek', e); |
| 115 | |
| 116 | var im = audioPlayer.imageElement; |
| 117 | var pos = (e.offsetX || e.originalEvent.layerX) / im.width(); |
| 118 | |
| 119 | audioPlayer.audioElement.currentTime = pos * audioPlayer.audioElement.duration; |
| 120 | audioPlayer.audioElement.play(); |
| 121 | audioPlayer.setState(audioPlayer.PLAYING); |
| 122 | }; |
| 123 | |
| 124 | audioPlayer.onEnded = function (e) { |
| 125 | audioPlayer.setState(audioPlayer.PAUSED); |
| 126 | } |
| 127 | |
| 128 | audioPlayer.playPause = function (e) { |
| 129 | console.log('playPause', e); |
| 130 | if (audioPlayer.audioElement.paused) { |
| 131 | audioPlayer.audioElement.play(); |
| 132 | audioPlayer.setState(audioPlayer.PLAYING); |
| 133 | } else { |
| 134 | audioPlayer.audioElement.pause(); |
| 135 | audioPlayer.setState(audioPlayer.PAUSED); |
| 136 | } |
| 137 | }; |
| 138 | |
| 139 | audioPlayer.NULL = null; |
| 140 | audioPlayer.PLAYING = 2; |
| 141 | audioPlayer.PAUSED = 4; |
| 142 | |
| 143 | audioPlayer.state = audioPlayer.NULL; |
| 144 | |
| 145 | audioPlayer.setState = function (state) { |
| 146 | if (state == audioPlayer.state) { |
| 147 | return; |
| 148 | } else { |
| 149 | audioPlayer.state = state; |
| 150 | } |
| 151 | |
| 152 | switch (state) { |
| 153 | case audioPlayer.PLAYING: |
| 154 | $('.audio-spectrogram .audio-control-play-pause') |
| 155 | .removeClass('paused').addClass('playing') |
| 156 | .text('▮▮'); |
| 157 | break; |
| 158 | case audioPlayer.PAUSED: |
| 159 | $('.audio-spectrogram .audio-control-play-pause') |
| 160 | .removeClass('playing').addClass('paused') |
| 161 | .text('▶'); |
| 162 | break; |
| 163 | } |
| 164 | }; |
| 165 | |
| 166 | audioPlayer.durationChange = function () { |
| 167 | // ??? |
| 168 | }; |
| 169 | |
| 170 | audioPlayer.timeUpdate = function () { |
| 171 | /** |
| 172 | * Callback handler for the timeupdate event, responsible for |
| 173 | * updating the playhead |
| 174 | */ |
| 175 | var currentTime = audioPlayer.audioElement.currentTime; |
| 176 | var playhead = audioPlayer.imageElement.parent().find('.playhead'); |
| 177 | playhead.css('width', (currentTime / audioPlayer.audioElement.duration) |
| 178 | * audioPlayer.imageElement.width()); |
| 179 | var time = formatTime(currentTime); |
| 180 | var duration = formatTime(audioPlayer.audioElement.duration); |
| 181 | audioPlayer.imageElement.parent() |
| 182 | .find('.audio-currentTime') |
| 183 | .text(time + '/' + duration); |
| 184 | }; |
| 185 | |
| 186 | function formatTime(seconds) { |
| 187 | /** |
| 188 | * Format a time duration in (hh:)?mm:ss manner |
| 189 | */ |
| 190 | var h = Math.floor(seconds / (60 * 60)); |
| 191 | var m = Math.floor((seconds - h * 60 * 60) / 60); |
| 192 | var s = Math.round(seconds - h * 60 * 60 - m * 60); |
| 193 | return '' + (h ? (h < 10 ? '0' + h : h) + ':' : '') + (m < 10 ? '0' + m : m) + ':' + (s < 10 ? '0' + s : s); |
| 194 | } |
| 195 | |
| 196 | audioPlayer.formatTime = formatTime; |
| 197 | |
| 198 | audioPlayer.attachToImage = function (imageElement) { |
| 199 | /** |
| 200 | * Attach the player to an image element |
| 201 | */ |
| 202 | console.log(imageElement); |
| 203 | |
| 204 | var im = $(imageElement); |
| 205 | |
| 206 | audioPlayer.imageElement = im; |
| 207 | |
| 208 | $('<div class="playhead"></div>').appendTo(im.parent()); |
| 209 | $('<div class="buffered-indicators"></div>').appendTo(im.parent()); |
| 210 | $('<div class="seekbar"></div>').appendTo(im.parent()); |
| 211 | $('<div class="audio-control-play-pause paused">▶</div>').appendTo(im.parent()); |
| 212 | $('<div class="audio-currentTime">00:00</div>').appendTo(im.parent()); |
| 213 | $('<input type="range" class="audio-volume"' |
| 214 | +'value="1" min="0" max="1" step="0.001" />').appendTo(im.parent()); |
| 215 | $('.audio-spectrogram').trigger('attachedControls'); |
| 216 | }; |
| 217 | })(audioPlayer); |
| 218 | |
| 219 | $(document).ready(function () { |
| 220 | if (!$('.audio-media').length) { |
| 221 | return; |
| 222 | } |
| 223 | |
| 224 | console.log('Initializing audio player'); |
| 225 | |
| 226 | audioElements = $('.audio-media .audio-player'); |
| 227 | audioPlayer.init(audioElements[0]); |
| 228 | audioPlayer.attachToImage($('.audio-spectrogram img')[0]); |
| 229 | }); |