Add support for J2C (#596)

sindresorhus · Apr 25, 2023 · 51bd34c · 51bd34c
1 parent 1899fc1
commit 51bd34c
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Showing 7 changed files with 16 additions and 0 deletions.
diff --git a/core.d.ts b/core.d.ts
@@ -83,6 +83,7 @@ export type FileExtension =
 	| 'xlsx'
 	| '3gp'
 	| '3g2'
+	| 'j2c'
 	| 'jp2'
 	| 'jpm'
 	| 'jpx'
@@ -236,6 +237,7 @@ export type MimeType =
 	| 'video/mp2t'
 	| 'application/x-blender'
 	| 'image/bpg'
+	| 'image/j2c'
 	| 'image/jp2'
 	| 'image/jpx'
 	| 'image/jpm'

diff --git a/core.js b/core.js
@@ -1201,6 +1201,13 @@ class FileTypeParser {
 			};
 		}
 
+		if (this.check([0xFF, 0x4F, 0xFF, 0x51])) {
+			return {
+				ext: 'j2c',
+				mime: 'image/j2c',
+			};
+		}
+
 		if (this.check([0x00, 0x00, 0x00, 0x0C, 0x6A, 0x50, 0x20, 0x20, 0x0D, 0x0A, 0x87, 0x0A])) {
 			// JPEG-2000 family
 

diff --git a/fixture/fixture.j2c b/fixture/fixture.j2c
diff --git a/package.json b/package.json
@@ -132,6 +132,7 @@
 		"pptx",
 		"xlsx",
 		"3gp",
+		"j2c",
 		"jp2",
 		"jpm",
 		"jpx",

diff --git a/readme.md b/readme.md
@@ -400,6 +400,7 @@ Returns a `Set<string>` of supported MIME types.
 - [`ics`](https://en.wikipedia.org/wiki/ICalendar#Data_format) - iCalendar
 - [`indd`](https://en.wikipedia.org/wiki/Adobe_InDesign#File_format) - Adobe InDesign document
 - [`it`](https://wiki.openmpt.org/Manual:_Module_formats#The_Impulse_Tracker_format_.28.it.29) - Audio module format: Impulse Tracker
+- [`j2c`](https://en.wikipedia.org/wiki/JPEG_2000) - JPEG 2000
 - [`jls`](https://en.wikipedia.org/wiki/Lossless_JPEG#JPEG-LS) - Lossless/near-lossless compression standard for continuous-tone images
 - [`jp2`](https://en.wikipedia.org/wiki/JPEG_2000) - JPEG 2000
 - [`jpg`](https://en.wikipedia.org/wiki/JPEG) - Joint Photographic Experts Group image

diff --git a/supported.js b/supported.js
@@ -81,6 +81,7 @@ export const extensions = [
 	'xlsx',
 	'3gp',
 	'3g2',
+	'j2c',
 	'jp2',
 	'jpm',
 	'jpx',
@@ -232,6 +233,7 @@ export const mimeTypes = [
 	'video/mp2t',
 	'application/x-blender',
 	'image/bpg',
+	'image/j2c',
 	'image/jp2',
 	'image/jpx',
 	'image/jpm',

diff --git a/test.js b/test.js
@@ -243,6 +243,9 @@ const names = {
 	dwg: [
 		'fixture-line-weights',
 	],
+	j2c: [
+		'fixture',
+	],
 	cpio: [
 		'fixture-bin',
 		'fixture-ascii',