Add support for Sony DSF (DSD Stream File) format

index.d.ts

@@ -94,7 +94,8 @@ declare namespace fileType {
 		| 'mpc'
 		| 'ics'
 		| 'glb'
-		| 'pcap';
+		| 'pcap'
+		| 'dsf';
 
 	interface FileTypeResult {
 		/**

index.js

@@ -920,6 +920,14 @@ const fileType = input => {
 		};
 	}
 
+	// Sony DSD Stream File (DSF)
+	if (check([0x44, 0x53, 0x44, 0x20])) {
+		return {
+			ext: 'dsf',
+			mime: 'audio/x-dsf' // Non-standard
+		};
+	}
+
 	return null;
 };
 

package.json

@@ -118,7 +118,8 @@
 		"wma",
 		"ics",
 		"glb",
-		"pcap"
+		"pcap",
+		"dsf"
 	],
 	"devDependencies": {
 		"@types/node": "^11.12.2",

readme.md

@@ -216,6 +216,7 @@ Type: [`stream.Readable`](https://nodejs.org/api/stream.html#stream_class_stream
 - [`ics`](https://en.wikipedia.org/wiki/ICalendar#Data_format) - iCalendar
 - [`glb`](https://github.com/KhronosGroup/glTF) - GL Transmission Format
 - [`pcap`](https://wiki.wireshark.org/Development/LibpcapFileFormat) - Libpcap File Format
+- [`dsf`](https://dsd-guide.com/sites/default/files/white-papers/DSFFileFormatSpec_E.pdf) - Sony DSD Stream File (DSF)
 
 *SVG isn't included as it requires the whole file to be read, but you can get it [here](https://github.com/sindresorhus/is-svg).*
 

test.js

@@ -104,7 +104,8 @@ const types = [
 	'dcm',
 	'ics',
 	'glb',
-	'pcap'
+	'pcap',
+	'dsf'
 ];
 
 // Define an entry here only if the fixture has a different