Add option to client-facing API to drop all animations, pass it down to C++ level

Author: JustAMan

src/post-worker.js

@@ -9,6 +9,7 @@ self.lastCurrentTimeReceivedAt = Date.now();
 self.targetFps = 30;
 self.libassMemoryLimit = 0; // in MiB
 self.renderOnDemand = false; // determines if only rendering on demand
+self.dropAllAnimations = false; // set to true to enable "lite mode" with all animations disabled for speed
 
 self.width = 0;
 self.height = 0;
@@ -597,6 +598,7 @@ function onMessageFromMainEmscriptenThread(message) {
             self.libassMemoryLimit = message.data.libassMemoryLimit || self.libassMemoryLimit;
             self.libassGlyphLimit = message.data.libassGlyphLimit || 0;
             self.renderOnDemand = message.data.renderOnDemand || false;
+            self.dropAllAnimations = message.data.dropAllAnimations || false;
             removeRunDependency('worker-init');
             break;
         }

src/pre-worker.js

@@ -95,6 +95,7 @@ Module['onRuntimeInitialized'] = function () {
     self.changed = Module._malloc(4);
 
     self.octObj.initLibrary(screen.width, screen.height);
+    self.octObj.setDropAnimations(!!self.dropAllAnimations);
     self.octObj.createTrack("/sub.ass");
     self.ass_track = self.octObj.track;
     self.ass_library = self.octObj.ass_library;

src/subtitles-octopus.js

@@ -14,6 +14,7 @@ var SubtitlesOctopus = function (options) {
     var self = this;
     self.canvas = options.canvas; // HTML canvas element (optional if video specified)
     self.renderMode = options.renderMode || (options.lossyRender ? 'fast' : (options.blendRender ? 'blend' : 'normal'));
+    self.dropAllAnimations = options.dropAllAnimations || false;
     self.libassMemoryLimit = options.libassMemoryLimit || 0; // set libass bitmap cache memory limit in MiB (approximate)
     self.libassGlyphLimit = options.libassGlyphLimit || 0; // set libass glyph cache memory limit in MiB (approximate)
     self.targetFps = options.targetFps || 30;
@@ -122,7 +123,8 @@ var SubtitlesOctopus = function (options) {
             targetFps: self.targetFps,
             libassMemoryLimit: self.libassMemoryLimit,
             libassGlyphLimit: self.libassGlyphLimit,
-            renderOnDemand: self.renderAhead > 0
+            renderOnDemand: self.renderAhead > 0,
+            dropAllAnimations: self.dropAllAnimations
         });
     };