Mercurial > web

comparison js/chiptune2.js @ 58:e6c574c6f8e0

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
music: reupload music to the music folder, fix links
author Paper <mrpapersonic@gmail.com>
date Mon, 19 Dec 2022 18:31:02 -0500
parents
children 629553bdc8aa
comparison
equal deleted inserted replaced
57:ac1900c0e376 58:e6c574c6f8e0
1 // constants
2 const OPENMPT_MODULE_RENDER_STEREOSEPARATION_PERCENT = 2
3 const OPENMPT_MODULE_RENDER_INTERPOLATIONFILTER_LENGTH = 3
4
5 // audio context
6 var ChiptuneAudioContext = window['AudioContext'] || window['webkitAudioContext'];
7
8 // config
9 var ChiptuneJsConfig = function (repeatCount, stereoSeparation, interpolationFilter, context)
10 {
11 this.repeatCount = repeatCount;
12 this.stereoSeparation = stereoSeparation;
13 this.interpolationFilter = interpolationFilter;
14 this.context = context;
15 }
16
17 ChiptuneJsConfig.prototype.constructor = ChiptuneJsConfig;
18
19 // player
20 var ChiptuneJsPlayer = function (config) {
21 this.config = config;
22 this.context = config.context || new ChiptuneAudioContext();
23 this.currentPlayingNode = null;
24 this.handlers = [];
25 this.touchLocked = true;
26 }
27
28 ChiptuneJsPlayer.prototype.constructor = ChiptuneJsPlayer;
29
30 // event handlers section
31 ChiptuneJsPlayer.prototype.fireEvent = function (eventName, response) {
32 var handlers = this.handlers;
33 if (handlers.length) {
34 handlers.forEach(function (handler) {
35 if (handler.eventName === eventName) {
36 handler.handler(response);
37 }
38 })
39 }
40 }
41
42 ChiptuneJsPlayer.prototype.addHandler = function (eventName, handler) {
43 this.handlers.push({eventName: eventName, handler: handler});
44 }
45
46 ChiptuneJsPlayer.prototype.onEnded = function (handler) {
47 this.addHandler('onEnded', handler);
48 }
49
50 ChiptuneJsPlayer.prototype.onError = function (handler) {
51 this.addHandler('onError', handler);
52 }
53
54 // metadata
55 ChiptuneJsPlayer.prototype.duration = function() {
56 return libopenmpt._openmpt_module_get_duration_seconds(this.currentPlayingNode.modulePtr);
57 }
58
59 ChiptuneJsPlayer.prototype.getCurrentRow = function() {
60 return libopenmpt._openmpt_module_get_current_row(this.currentPlayingNode.modulePtr);
61 }
62
63 ChiptuneJsPlayer.prototype.getCurrentPattern = function() {
64 return libopenmpt._openmpt_module_get_current_pattern(this.currentPlayingNode.modulePtr);
65 }
66
67 ChiptuneJsPlayer.prototype.getCurrentOrder = function() {
68 return libopenmpt._openmpt_module_get_current_order(this.currentPlayingNode.modulePtr);
69 }
70
71 ChiptuneJsPlayer.prototype.getCurrentTime = function () {
72 return libopenmpt._openmpt_module_get_position_seconds(this.currentPlayingNode.modulePtr);
73 };
74
75 ChiptuneJsPlayer.prototype.getTotalOrder = function () {
76 return libopenmpt._openmpt_module_get_num_orders(this.currentPlayingNode.modulePtr);
77 };
78
79 ChiptuneJsPlayer.prototype.getTotalPatterns = function () {
80 return libopenmpt._openmpt_module_get_num_patterns(this.currentPlayingNode.modulePtr);
81 };
82
83 ChiptuneJsPlayer.prototype.metadata = function() {
84 var data = {};
85 var keys = UTF8ToString(libopenmpt._openmpt_module_get_metadata_keys(this.currentPlayingNode.modulePtr)).split(';');
86 var keyNameBuffer = 0;
87 for (var i = 0; i < keys.length; i++) {
88 keyNameBuffer = libopenmpt._malloc(keys[i].length + 1);
89 writeAsciiToMemory(keys[i], keyNameBuffer);
90 data[keys[i]] = UTF8ToString(libopenmpt._openmpt_module_get_metadata(this.currentPlayingNode.modulePtr, keyNameBuffer));
91 libopenmpt._free(keyNameBuffer);
92 }
93 return data;
94 }
95
96 ChiptuneJsPlayer.prototype.module_ctl_set = function(ctl, value) {
97 return libopenmpt.ccall('openmpt_module_ctl_set', 'number', ['number', 'string', 'string'], [this.currentPlayingNode.modulePtr, ctl, value]) === 1;
98 }
99
100 // playing, etc
101 ChiptuneJsPlayer.prototype.unlock = function() {
102
103 var context = this.context;
104 var buffer = context.createBuffer(1, 1, 22050);
105 var unlockSource = context.createBufferSource();
106
107 unlockSource.buffer = buffer;
108 unlockSource.connect(context.destination);
109 unlockSource.start(0);
110
111 this.touchLocked = false;
112 }
113
114 ChiptuneJsPlayer.prototype.load = function(input, callback) {
115
116 if (this.touchLocked) {
117 this.unlock();
118 }
119
120 var player = this;
121
122 if (input instanceof File) {
123 var reader = new FileReader();
124 reader.onload = function() {
125 return callback(reader.result); // no error
126 }.bind(this);
127 reader.readAsArrayBuffer(input);
128 } else {
129 var xhr = new XMLHttpRequest();
130 xhr.open('GET', input, true);
131 xhr.responseType = 'arraybuffer';
132 xhr.onload = function(e) {
133 if (xhr.status === 200) {
134 return callback(xhr.response); // no error
135 } else {
136 player.fireEvent('onError', {type: 'onxhr'});
137 }
138 }.bind(this);
139 xhr.onerror = function() {
140 player.fireEvent('onError', {type: 'onxhr'});
141 };
142 xhr.onabort = function() {
143 player.fireEvent('onError', {type: 'onxhr'});
144 };
145 xhr.send();
146 }
147 }
148
149 ChiptuneJsPlayer.prototype.play = function(buffer) {
150 this.stop();
151 var processNode = this.createLibopenmptNode(buffer, this.config);
152 if (processNode == null) {
153 return;
154 }
155
156 // set config options on module
157 libopenmpt._openmpt_module_set_repeat_count(processNode.modulePtr, this.config.repeatCount);
158 libopenmpt._openmpt_module_set_render_param(processNode.modulePtr, OPENMPT_MODULE_RENDER_STEREOSEPARATION_PERCENT, this.config.stereoSeparation);
159 libopenmpt._openmpt_module_set_render_param(processNode.modulePtr, OPENMPT_MODULE_RENDER_INTERPOLATIONFILTER_LENGTH, this.config.interpolationFilter);
160
161 this.currentPlayingNode = processNode;
162 processNode.connect(this.context.destination);
163 }
164
165 ChiptuneJsPlayer.prototype.stop = function() {
166 if (this.currentPlayingNode != null) {
167 this.currentPlayingNode.disconnect();
168 this.currentPlayingNode.cleanup();
169 this.currentPlayingNode = null;
170 }
171 }
172
173 ChiptuneJsPlayer.prototype.togglePause = function() {
174 if (this.currentPlayingNode != null) {
175 this.currentPlayingNode.togglePause();
176 }
177 }
178
179 ChiptuneJsPlayer.prototype.createLibopenmptNode = function(buffer, config) {
180 // TODO error checking in this whole function
181
182 var maxFramesPerChunk = 4096;
183 var processNode = this.context.createScriptProcessor(2048, 0, 2);
184 processNode.config = config;
185 processNode.player = this;
186 var byteArray = new Int8Array(buffer);
187 var ptrToFile = libopenmpt._malloc(byteArray.byteLength);
188 libopenmpt.HEAPU8.set(byteArray, ptrToFile);
189 processNode.modulePtr = libopenmpt._openmpt_module_create_from_memory(ptrToFile, byteArray.byteLength, 0, 0, 0);
190 processNode.paused = false;
191 processNode.leftBufferPtr = libopenmpt._malloc(4 * maxFramesPerChunk);
192 processNode.rightBufferPtr = libopenmpt._malloc(4 * maxFramesPerChunk);
193 processNode.cleanup = function() {
194 if (this.modulePtr != 0) {
195 libopenmpt._openmpt_module_destroy(this.modulePtr);
196 this.modulePtr = 0;
197 }
198 if (this.leftBufferPtr != 0) {
199 libopenmpt._free(this.leftBufferPtr);
200 this.leftBufferPtr = 0;
201 }
202 if (this.rightBufferPtr != 0) {
203 libopenmpt._free(this.rightBufferPtr);
204 this.rightBufferPtr = 0;
205 }
206 }
207 processNode.stop = function() {
208 this.disconnect();
209 this.cleanup();
210 }
211 processNode.pause = function() {
212 this.paused = true;
213 }
214 processNode.unpause = function() {
215 this.paused = false;
216 }
217 processNode.togglePause = function() {
218 this.paused = !this.paused;
219 }
220 processNode.onaudioprocess = function(e) {
221 var outputL = e.outputBuffer.getChannelData(0);
222 var outputR = e.outputBuffer.getChannelData(1);
223 var framesToRender = outputL.length;
224 if (this.ModulePtr == 0) {
225 for (var i = 0; i < framesToRender; ++i) {
226 outputL[i] = 0;
227 outputR[i] = 0;
228 }
229 this.disconnect();
230 this.cleanup();
231 return;
232 }
233 if (this.paused) {
234 for (var i = 0; i < framesToRender; ++i) {
235 outputL[i] = 0;
236 outputR[i] = 0;
237 }
238 return;
239 }
240 var framesRendered = 0;
241 var ended = false;
242 var error = false;
243 while (framesToRender > 0) {
244 var framesPerChunk = Math.min(framesToRender, maxFramesPerChunk);
245 var actualFramesPerChunk = libopenmpt._openmpt_module_read_float_stereo(this.modulePtr, this.context.sampleRate, framesPerChunk, this.leftBufferPtr, this.rightBufferPtr);
246 if (actualFramesPerChunk == 0) {
247 ended = true;
248 // modulePtr will be 0 on openmpt: error: openmpt_module_read_float_stereo: ERROR: module * not valid or other openmpt error
249 error = !this.modulePtr;
250 }
251 var rawAudioLeft = libopenmpt.HEAPF32.subarray(this.leftBufferPtr / 4, this.leftBufferPtr / 4 + actualFramesPerChunk);
252 var rawAudioRight = libopenmpt.HEAPF32.subarray(this.rightBufferPtr / 4, this.rightBufferPtr / 4 + actualFramesPerChunk);
253 for (var i = 0; i < actualFramesPerChunk; ++i) {
254 outputL[framesRendered + i] = rawAudioLeft[i];
255 outputR[framesRendered + i] = rawAudioRight[i];
256 }
257 for (var i = actualFramesPerChunk; i < framesPerChunk; ++i) {
258 outputL[framesRendered + i] = 0;
259 outputR[framesRendered + i] = 0;
260 }
261 framesToRender -= framesPerChunk;
262 framesRendered += framesPerChunk;
263 }
264 if (ended) {
265 this.disconnect();
266 this.cleanup();
267 error ? processNode.player.fireEvent('onError', {type: 'openmpt'}) : processNode.player.fireEvent('onEnded');
268 }
269 }
270 return processNode;
271 }