update:

1. 去除多余log
2. 性能优化
3. 修正使用 NSLock 同步线程产生的警告， 换为 dispatch_semaphore
4. 修正sketch filter在黑色背景下产生除数为0的bug

Author: wysaid

demo/cgeDemo.xcodeproj/project.pbxproj

@@ -7,15 +7,15 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
-		D334E8D11BCCB81F00D32A2D /* test.mp4 in Resources */ = {isa = PBXBuildFile; fileRef = D334E8D01BCCB81F00D32A2D /* test.mp4 */; settings = {ASSET_TAGS = (); }; };
+		D334E8D11BCCB81F00D32A2D /* test.mp4 in Resources */ = {isa = PBXBuildFile; fileRef = D334E8D01BCCB81F00D32A2D /* test.mp4 */; };
 		D33BBD551B940FFD00B1E285 /* test.jpg in Resources */ = {isa = PBXBuildFile; fileRef = D33BBD541B940FFD00B1E285 /* test.jpg */; };
 		D33BBD571B942EB900B1E285 /* MainViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = D33BBD561B942EB900B1E285 /* MainViewController.m */; };
 		D33BBD5A1B94371C00B1E285 /* 1.jpg in Resources */ = {isa = PBXBuildFile; fileRef = D33BBD591B94371C00B1E285 /* 1.jpg */; };
 		D33BBD5D1B943AE800B1E285 /* CameraDemoViewController.m in Sources */ = {isa = PBXBuildFile; fileRef = D33BBD5C1B943AE800B1E285 /* CameraDemoViewController.m */; };
 		D33BBD601B943B1400B1E285 /* PlayerDemoController.m in Sources */ = {isa = PBXBuildFile; fileRef = D33BBD5F1B943B1400B1E285 /* PlayerDemoController.m */; };
-		D34CD2E91BD4E64E00154CEE /* cge.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = D34CD2E81BD4E64E00154CEE /* cge.framework */; settings = {ASSET_TAGS = (); }; };
-		D3AC46D91BCE5D5A00A3B565 /* 1.mp4 in Resources */ = {isa = PBXBuildFile; fileRef = D3AC46D81BCE5D5A00A3B565 /* 1.mp4 */; settings = {ASSET_TAGS = (); }; };
-		D3F843E41BC620CD00A4A307 /* mask1.png in Resources */ = {isa = PBXBuildFile; fileRef = D3F843E31BC620CD00A4A307 /* mask1.png */; settings = {ASSET_TAGS = (); }; };
+		D34CD2E91BD4E64E00154CEE /* cge.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = D34CD2E81BD4E64E00154CEE /* cge.framework */; };
+		D3AC46D91BCE5D5A00A3B565 /* 1.mp4 in Resources */ = {isa = PBXBuildFile; fileRef = D3AC46D81BCE5D5A00A3B565 /* 1.mp4 */; };
+		D3F843E41BC620CD00A4A307 /* mask1.png in Resources */ = {isa = PBXBuildFile; fileRef = D3F843E31BC620CD00A4A307 /* mask1.png */; };
 		D3FCC7B51B9C5446003B1D34 /* demoUtils.m in Sources */ = {isa = PBXBuildFile; fileRef = D3FCC7B41B9C5446003B1D34 /* demoUtils.m */; };
 		DB3C50581B92E1CA005985C1 /* 0.jpg in Resources */ = {isa = PBXBuildFile; fileRef = DB3C50511B92E1CA005985C1 /* 0.jpg */; };
 		DB4342191B4FCC8A00ED886F /* main.m in Sources */ = {isa = PBXBuildFile; fileRef = DB4342181B4FCC8A00ED886F /* main.m */; };
@@ -44,7 +44,7 @@
 		D3FCC7B31B9C5446003B1D34 /* demoUtils.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = demoUtils.h; sourceTree = "<group>"; };
 		D3FCC7B41B9C5446003B1D34 /* demoUtils.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = demoUtils.m; sourceTree = "<group>"; };
 		DB3C50511B92E1CA005985C1 /* 0.jpg */ = {isa = PBXFileReference; lastKnownFileType = image.jpeg; path = 0.jpg; sourceTree = "<group>"; };
-		DB4342131B4FCC8A00ED886F /* cgeDemo.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = cgeDemo.app; sourceTree = BUILT_PRODUCTS_DIR; };
+		DB4342131B4FCC8A00ED886F /* cge demo.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = "cge demo.app"; sourceTree = BUILT_PRODUCTS_DIR; };
 		DB4342171B4FCC8A00ED886F /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		DB4342181B4FCC8A00ED886F /* main.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = main.m; sourceTree = "<group>"; };
 		DB43421A1B4FCC8A00ED886F /* AppDelegate.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = AppDelegate.h; sourceTree = "<group>"; };
@@ -109,7 +109,7 @@
 		DB4342141B4FCC8A00ED886F /* Products */ = {
 			isa = PBXGroup;
 			children = (
-				DB4342131B4FCC8A00ED886F /* cgeDemo.app */,
+				DB4342131B4FCC8A00ED886F /* cge demo.app */,
 			);
 			name = Products;
 			sourceTree = "<group>";
@@ -150,9 +150,9 @@
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
-		DB4342121B4FCC8A00ED886F /* cgeDemo */ = {
+		DB4342121B4FCC8A00ED886F /* cge demo */ = {
 			isa = PBXNativeTarget;
-			buildConfigurationList = DB4342361B4FCC8A00ED886F /* Build configuration list for PBXNativeTarget "cgeDemo" */;
+			buildConfigurationList = DB4342361B4FCC8A00ED886F /* Build configuration list for PBXNativeTarget "cge demo" */;
 			buildPhases = (
 				DB43420F1B4FCC8A00ED886F /* Sources */,
 				DB4342101B4FCC8A00ED886F /* Frameworks */,
@@ -162,9 +162,9 @@
 			);
 			dependencies = (
 			);
-			name = cgeDemo;
+			name = "cge demo";
 			productName = cgeDemo;
-			productReference = DB4342131B4FCC8A00ED886F /* cgeDemo.app */;
+			productReference = DB4342131B4FCC8A00ED886F /* cge demo.app */;
 			productType = "com.apple.product-type.application";
 		};
 /* End PBXNativeTarget section */
@@ -195,7 +195,7 @@
 			projectDirPath = "";
 			projectRoot = "";
 			targets = (
-				DB4342121B4FCC8A00ED886F /* cgeDemo */,
+				DB4342121B4FCC8A00ED886F /* cge demo */,
 			);
 		};
 /* End PBXProject section */
@@ -395,7 +395,7 @@
 			defaultConfigurationIsVisible = 0;
 			defaultConfigurationName = Release;
 		};
-		DB4342361B4FCC8A00ED886F /* Build configuration list for PBXNativeTarget "cgeDemo" */ = {
+		DB4342361B4FCC8A00ED886F /* Build configuration list for PBXNativeTarget "cge demo" */ = {
 			isa = XCConfigurationList;
 			buildConfigurations = (
 				DB4342371B4FCC8A00ED886F /* Debug */,