Index: remoting/webapp/video_frame_recorder.js |
diff --git a/remoting/webapp/video_frame_recorder.js b/remoting/webapp/video_frame_recorder.js |
new file mode 100644 |
index 0000000000000000000000000000000000000000..7a9eab560120b05cfc71f65c00cb192af92a8970 |
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+++ b/remoting/webapp/video_frame_recorder.js |
@@ -0,0 +1,134 @@ |
+// Copyright 2014 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+/** |
+ * @fileoverview |
+ * Class implement the video frame recorder extension client. |
Jamie
2014/08/19 00:48:56
s/implement/implementing/
|
+ */ |
+ |
+'use strict'; |
+ |
+/** @suppress {duplicate} */ |
+var remoting = remoting || {}; |
+ |
+/** |
+ * @constructor |
+ */ |
+remoting.VideoFrameRecorder = function(plugin) { |
+ this.fileWriter_ = null; |
+ this.isRecording_ = false; |
+ this.plugin_ = plugin; |
+}; |
+ |
+/** |
+ * |
+ */ |
+remoting.VideoFrameRecorder.prototype.startStopRecording = function() { |
+ var data = {}; |
+ if (this.isRecording_) { |
+ this.isRecording_ = false; |
+ data = { type: 'stop' } |
+ |
+ chrome.fileSystem.chooseEntry( |
+ {type: 'saveFile', suggestedName: "videoRecording.pb"}, |
Jamie
2014/08/19 00:48:56
You've used padding spaces after '{' and before '}
|
+ this.onFileChosen_.bind(this)); |
+ } else { |
+ this.isRecording_ = true; |
+ data = { type: 'start' } |
+ } |
+ this.plugin_.sendClientMessage('video-recorder', JSON.stringify(data)); |
+} |
+ |
+/** |
+ * |
+ */ |
+remoting.VideoFrameRecorder.prototype.onFileChosen_ = function(fileEntry) { |
+ if (!fileEntry) { |
+ console.log("Cancelled save of video frames."); |
+ } else { |
+ chrome.fileSystem.getDisplayPath(fileEntry, function(path) { |
+ console.log("Saving video frames to:" + path); |
+ }); |
+ fileEntry.createWriter(this.onFileWriter_.bind(this)); |
+ } |
+} |
+ |
+/** |
+ * |
+ */ |
+remoting.VideoFrameRecorder.prototype.onFileWriter_ = function(fileWriter) { |
+ console.log("Obtained FileWriter for video frame write"); |
+ fileWriter.onwriteend = this.onWriteComplete_.bind(this); |
Jamie
2014/08/19 00:48:56
Do you need an onerror handler?
|
+ this.fileWriter_ = fileWriter; |
+ this.fetchNextFrame_(); |
+} |
+ |
+/* |
+ * |
+ */ |
+remoting.VideoFrameRecorder.prototype.onWriteComplete_ = function(e) { |
Jamie
2014/08/19 00:48:56
In JS, there's no need to declare parameters if yo
|
+ console.log("Video frame write complete"); |
+ this.fetchNextFrame_(); |
+} |
+ |
+/* |
+ * |
+ */ |
+remoting.VideoFrameRecorder.prototype.fetchNextFrame_ = function() { |
+ console.log("Request next video frame"); |
+ var data = { type: 'next-frame' } |
+ this.plugin_.sendClientMessage('video-recorder', JSON.stringify(data)); |
+} |
+ |
+/** |
+ * |
+ */ |
+remoting.VideoFrameRecorder.prototype.handleMessage = |
+ function(type, data) { |
+ if (type != 'video-recorder') { |
+ return false; |
+ } |
+ |
+ var message = getJsonObjectFromString(data); |
+ |
+ if (message.type == 'next-frame-reply') { |
+ if (!this.fileWriter_) { |
+ console.log("Received frame but have no writer"); |
+ return true; |
+ } |
+ if (!message.data) { |
+ console.log("Finished receiving frames"); |
+ this.fileWriter_ = null; |
+ return true; |
+ } |
+ |
+ console.log("Received frame"); |
+ var videoPacketString = atob(message.data); |
+ |
+ console.log("Converted from Base64 - length:" + videoPacketString.length); |
+ var byteArrays = []; |
+ |
+ for (var offset = 0; offset < videoPacketString.length; offset += 512) { |
+ var slice = videoPacketString.slice(offset, offset + 512); |
Jamie
2014/08/19 00:48:56
Indentation.
|
+ var byteNumbers = new Array(slice.length); |
+ for (var i = 0; i < slice.length; i++) { |
+ byteNumbers[i] = slice.charCodeAt(i); |
+ } |
Jamie
2014/08/19 00:48:56
Can you do this more succinctly with Array.map?
|
+ var byteArray = new Uint8Array(byteNumbers); |
+ byteArrays.push(byteArray); |
+ } |
+ |
+ console.log("Writing frame"); |
+ videoPacketString = null; |
+ var videoPacketBlob = new Blob(byteArrays); |
+ byteArrays = null; |
+ |
+ this.fileWriter_.write(videoPacketBlob); |
+ |
+ return true; |
+ } |
+ |
+ console.log("Unrecognized message: " + message.type); |
+ return true; |
+} |