Floating Point Dither For All

3 files changed, 67 insertions, 78 deletions

diff --git a/plugins/MacAU/AtmosphereChannel/AtmosphereChannel.cpp b/plugins/MacAU/AtmosphereChannel/AtmosphereChannel.cpp
index d0ca7aa..6ca9131 100755
--- a/plugins/MacAU/AtmosphereChannel/AtmosphereChannel.cpp
+++ b/plugins/MacAU/AtmosphereChannel/AtmosphereChannel.cpp
@@ -203,7 +203,6 @@ void		AtmosphereChannel::AtmosphereChannelKernel::Process(	const Float32 	*inSou
 	UInt32 nSampleFrames = inFramesToProcess;
 	const Float32 *sourceP = inSourceP;
 	Float32 *destP = inDestP;
-	Float32 fpTemp;
 	Float64 overallscale = 1.0;
 	overallscale /= 44100.0;
 	overallscale *= GetSampleRate();
@@ -339,23 +338,15 @@ void		AtmosphereChannel::AtmosphereChannelKernel::Process(	const Float32 	*inSou
 		lastSampleA = drySample;
 		//store the raw input sample again for use next time
 		
-		//noise shaping to 32-bit floating point
-		fpTemp = inputSample;
-		fpNShape += (inputSample-fpTemp);
-		inputSample += fpNShape;
-		//for deeper space and warmth, we try a non-oscillating noise shaping
-		//that is kind of ruthless: it will forever retain the rounding errors
-		//except we'll dial it back a hair at the end of every buffer processed
-		//end noise shaping on 32 bit output
+		//32 bit dither, made small and tidy.
+		int expon; frexpf((Float32)inputSample, &expon);
+		long double dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62);
+		inputSample += (dither-fpNShape); fpNShape = dither;
+		//end 32 bit dither
 		
 		*destP = inputSample;
 		
 		sourceP += inNumChannels; destP += inNumChannels;
 	}
-	fpNShape *= 0.999999;
-	//we will just delicately dial back the FP noise shaping, not even every sample
-	//this is a good place to put subtle 'no runaway' calculations, though bear in mind
-	//that it will be called more often when you use shorter sample buffers in the DAW.
-	//So, very low latency operation will call these calculations more often.
 }
 
diff --git a/plugins/MacAU/AtmosphereChannel/AtmosphereChannel.xcodeproj/christopherjohnson.pbxuser b/plugins/MacAU/AtmosphereChannel/AtmosphereChannel.xcodeproj/christopherjohnson.pbxuser
index d21e452..64fb8bb 100755
--- a/plugins/MacAU/AtmosphereChannel/AtmosphereChannel.xcodeproj/christopherjohnson.pbxuser
+++ b/plugins/MacAU/AtmosphereChannel/AtmosphereChannel.xcodeproj/christopherjohnson.pbxuser
@@ -49,14 +49,14 @@
 					PBXFileDataSource_Warnings_ColumnID,
 				);
 			};
-			PBXPerProjectTemplateStateSaveDate = 546562903;
-			PBXWorkspaceStateSaveDate = 546562903;
+			PBXPerProjectTemplateStateSaveDate = 569588835;
+			PBXWorkspaceStateSaveDate = 569588835;
 		};
 		perUserProjectItems = {
 			8B2BAFD320548396002C5203 /* PlistBookmark */ = 8B2BAFD320548396002C5203 /* PlistBookmark */;
-			8BC5CF502093F4BA0058B257 /* PBXTextBookmark */ = 8BC5CF502093F4BA0058B257 /* PBXTextBookmark */;
-			8BC5CF512093F4BA0058B257 /* PBXTextBookmark */ = 8BC5CF512093F4BA0058B257 /* PBXTextBookmark */;
-			8BC5CF522093F4BA0058B257 /* PBXTextBookmark */ = 8BC5CF522093F4BA0058B257 /* PBXTextBookmark */;
+			8B7927B321F33C89006E9731 /* PBXTextBookmark */ = 8B7927B321F33C89006E9731 /* PBXTextBookmark */;
+			8B7927B821F33C9F006E9731 /* PBXTextBookmark */ = 8B7927B821F33C9F006E9731 /* PBXTextBookmark */;
+			8BFBE901209D18FF00E1438C /* PBXTextBookmark */ = 8BFBE901209D18FF00E1438C /* PBXTextBookmark */;
 		};
 		sourceControlManager = 8BD3CCB8148830B20062E48C /* Source Control */;
 		userBuildSettings = {
@@ -74,12 +74,32 @@
 		rLen = 0;
 		rLoc = 9223372036854775808;
 	};
+	8B7927B321F33C89006E9731 /* PBXTextBookmark */ = {
+		isa = PBXTextBookmark;
+		fRef = 8BA05A660720730100365D66 /* AtmosphereChannel.cpp */;
+		name = "AtmosphereChannel.cpp: 277";
+		rLen = 0;
+		rLoc = 11355;
+		rType = 0;
+		vrLen = 169;
+		vrLoc = 13693;
+	};
+	8B7927B821F33C9F006E9731 /* PBXTextBookmark */ = {
+		isa = PBXTextBookmark;
+		fRef = 8BA05A660720730100365D66 /* AtmosphereChannel.cpp */;
+		name = "AtmosphereChannel.cpp: 277";
+		rLen = 0;
+		rLoc = 11355;
+		rType = 0;
+		vrLen = 169;
+		vrLoc = 13693;
+	};
 	8BA05A660720730100365D66 /* AtmosphereChannel.cpp */ = {
 		uiCtxt = {
-			sepNavIntBoundsRect = "{{0, 0}, {769, 5018}}";
-			sepNavSelRange = "{14355, 349}";
-			sepNavVisRange = "{12684, 2023}";
-			sepNavWindowFrame = "{{624, 46}, {816, 832}}";
+			sepNavIntBoundsRect = "{{0, 0}, {482, 4654}}";
+			sepNavSelRange = "{11355, 0}";
+			sepNavVisRange = "{13693, 169}";
+			sepNavWindowFrame = "{{566, 46}, {816, 832}}";
 		};
 	};
 	8BA05A690720730100365D66 /* AtmosphereChannelVersion.h */ = {
@@ -90,42 +110,12 @@
 			sepNavWindowFrame = "{{726, 46}, {816, 832}}";
 		};
 	};
-	8BC5CF502093F4BA0058B257 /* PBXTextBookmark */ = {
-		isa = PBXTextBookmark;
-		fRef = 8BA05A660720730100365D66 /* AtmosphereChannel.cpp */;
-		name = "AtmosphereChannel.cpp: 277";
-		rLen = 0;
-		rLoc = 11372;
-		rType = 0;
-		vrLen = 304;
-		vrLoc = 13659;
-	};
-	8BC5CF512093F4BA0058B257 /* PBXTextBookmark */ = {
-		isa = PBXTextBookmark;
-		fRef = 8BC6025B073B072D006C4272 /* AtmosphereChannel.h */;
-		name = "AtmosphereChannel.h: 131";
-		rLen = 713;
-		rLoc = 5181;
-		rType = 0;
-		vrLen = 187;
-		vrLoc = 5816;
-	};
-	8BC5CF522093F4BA0058B257 /* PBXTextBookmark */ = {
-		isa = PBXTextBookmark;
-		fRef = 8BC6025B073B072D006C4272 /* AtmosphereChannel.h */;
-		name = "AtmosphereChannel.h: 131";
-		rLen = 713;
-		rLoc = 5181;
-		rType = 0;
-		vrLen = 187;
-		vrLoc = 5816;
-	};
 	8BC6025B073B072D006C4272 /* AtmosphereChannel.h */ = {
 		uiCtxt = {
-			sepNavIntBoundsRect = "{{0, 0}, {803, 2379}}";
-			sepNavSelRange = "{5181, 713}";
-			sepNavVisRange = "{5816, 187}";
-			sepNavWindowFrame = "{{635, 25}, {816, 832}}";
+			sepNavIntBoundsRect = "{{0, 0}, {894, 2132}}";
+			sepNavSelRange = "{5129, 0}";
+			sepNavVisRange = "{4652, 1351}";
+			sepNavWindowFrame = "{{624, 39}, {816, 832}}";
 		};
 	};
 	8BD3CCB8148830B20062E48C /* Source Control */ = {
@@ -142,6 +132,16 @@
 		isa = PBXCodeSenseManager;
 		indexTemplatePath = "";
 	};
+	8BFBE901209D18FF00E1438C /* PBXTextBookmark */ = {
+		isa = PBXTextBookmark;
+		fRef = 8BC6025B073B072D006C4272 /* AtmosphereChannel.h */;
+		name = "AtmosphereChannel.h: 131";
+		rLen = 713;
+		rLoc = 5181;
+		rType = 0;
+		vrLen = 181;
+		vrLoc = 5816;
+	};
 	8D01CCC60486CAD60068D4B7 /* AtmosphereChannel */ = {
 		activeExec = 0;
 	};
diff --git a/plugins/MacAU/AtmosphereChannel/AtmosphereChannel.xcodeproj/christopherjohnson.perspectivev3 b/plugins/MacAU/AtmosphereChannel/AtmosphereChannel.xcodeproj/christopherjohnson.perspectivev3
index 08b4968..f684856 100755
--- a/plugins/MacAU/AtmosphereChannel/AtmosphereChannel.xcodeproj/christopherjohnson.perspectivev3
+++ b/plugins/MacAU/AtmosphereChannel/AtmosphereChannel.xcodeproj/christopherjohnson.perspectivev3
@@ -256,8 +256,6 @@
 			<key>Layout</key>
 			<array>
 				<dict>
-					<key>BecomeActive</key>
-					<true/>
 					<key>ContentConfiguration</key>
 					<dict>
 						<key>PBXBottomSmartGroupGIDs</key>
@@ -326,7 +324,7 @@
 							<real>288</real>
 						</array>
 						<key>RubberWindowFrame</key>
-						<string>599 209 841 654 0 0 1440 878 </string>
+						<string>472 198 841 654 0 0 1440 878 </string>
 					</dict>
 					<key>Module</key>
 					<string>PBXSmartGroupTreeModule</string>
@@ -342,7 +340,7 @@
 								<key>PBXProjectModuleGUID</key>
 								<string>8BD7274A1D46E5A5000176F0</string>
 								<key>PBXProjectModuleLabel</key>
-								<string>AtmosphereChannel.h</string>
+								<string>AtmosphereChannel.cpp</string>
 								<key>PBXSplitModuleInNavigatorKey</key>
 								<dict>
 									<key>Split0</key>
@@ -350,16 +348,16 @@
 										<key>PBXProjectModuleGUID</key>
 										<string>8BD7274B1D46E5A5000176F0</string>
 										<key>PBXProjectModuleLabel</key>
-										<string>AtmosphereChannel.h</string>
+										<string>AtmosphereChannel.cpp</string>
 										<key>_historyCapacity</key>
 										<integer>0</integer>
 										<key>bookmark</key>
-										<string>8BC5CF522093F4BA0058B257</string>
+										<string>8B7927B821F33C9F006E9731</string>
 										<key>history</key>
 										<array>
 											<string>8B2BAFD320548396002C5203</string>
-											<string>8BC5CF502093F4BA0058B257</string>
-											<string>8BC5CF512093F4BA0058B257</string>
+											<string>8BFBE901209D18FF00E1438C</string>
+											<string>8B7927B321F33C89006E9731</string>
 										</array>
 									</dict>
 									<key>SplitCount</key>
@@ -373,18 +371,18 @@
 							<key>GeometryConfiguration</key>
 							<dict>
 								<key>Frame</key>
-								<string>{{0, 0}, {531, 158}}</string>
+								<string>{{0, 0}, {531, 92}}</string>
 								<key>RubberWindowFrame</key>
-								<string>599 209 841 654 0 0 1440 878 </string>
+								<string>472 198 841 654 0 0 1440 878 </string>
 							</dict>
 							<key>Module</key>
 							<string>PBXNavigatorGroup</string>
 							<key>Proportion</key>
-							<string>158pt</string>
+							<string>92pt</string>
 						</dict>
 						<dict>
 							<key>Proportion</key>
-							<string>450pt</string>
+							<string>516pt</string>
 							<key>Tabs</key>
 							<array>
 								<dict>
@@ -398,9 +396,7 @@
 									<key>GeometryConfiguration</key>
 									<dict>
 										<key>Frame</key>
-										<string>{{10, 27}, {531, 423}}</string>
-										<key>RubberWindowFrame</key>
-										<string>599 209 841 654 0 0 1440 878 </string>
+										<string>{{10, 27}, {531, 489}}</string>
 									</dict>
 									<key>Module</key>
 									<string>XCDetailModule</string>
@@ -454,7 +450,9 @@
 									<key>GeometryConfiguration</key>
 									<dict>
 										<key>Frame</key>
-										<string>{{10, 27}, {531, 339}}</string>
+										<string>{{10, 27}, {531, 489}}</string>
+										<key>RubberWindowFrame</key>
+										<string>472 198 841 654 0 0 1440 878 </string>
 									</dict>
 									<key>Module</key>
 									<string>PBXBuildResultsModule</string>
@@ -482,11 +480,11 @@
 			</array>
 			<key>TableOfContents</key>
 			<array>
-				<string>8BC5CF532093F4BA0058B257</string>
+				<string>8B7927B921F33C9F006E9731</string>
 				<string>1CA23ED40692098700951B8B</string>
-				<string>8BC5CF542093F4BA0058B257</string>
+				<string>8B7927BA21F33C9F006E9731</string>
 				<string>8BD7274A1D46E5A5000176F0</string>
-				<string>8BC5CF552093F4BA0058B257</string>
+				<string>8B7927BB21F33C9F006E9731</string>
 				<string>1CA23EDF0692099D00951B8B</string>
 				<string>1CA23EE00692099D00951B8B</string>
 				<string>1CA23EE10692099D00951B8B</string>
@@ -659,7 +657,7 @@
 	<key>StatusbarIsVisible</key>
 	<true/>
 	<key>TimeStamp</key>
-	<real>546567354.06319106</real>
+	<real>569588895.18574297</real>
 	<key>ToolbarConfigUserDefaultsMinorVersion</key>
 	<string>2</string>
 	<key>ToolbarDisplayMode</key>
@@ -679,7 +677,7 @@
 		<string>/Users/christopherjohnson/Desktop/MacAU/AtmosphereChannel/AtmosphereChannel.xcodeproj</string>
 	</array>
 	<key>WindowString</key>
-	<string>599 209 841 654 0 0 1440 878 </string>
+	<string>472 198 841 654 0 0 1440 878 </string>
 	<key>WindowToolsV3</key>
 	<array>
 		<dict>