animated-gif-detector - npm Package Compare versions

Comparing version 0.3.0 to 1.0.0

index.js

 var Writable = require('stream').Writable
-  , util = require('util')
+  , inherits = require('inherits')
+  // GIF CONSTANTS. source => http://www.onicos.com/staff/iz/formats/gif.html
+  , BLOCK_TERMINATOR = { value: new Buffer('00') }
+  , EXTENSION_INTRODUCER = {
+        value: new Buffer('21')
+      , head: 0
+      , tail: 1
+    }
+  , GRAPHIC_CONTROL_LABEL = {
+        value: new Buffer('f9')
+      , head: 1
+      , tail: 2
+    }
+  , DELAY_TIME = {
+        value: 0 // if there's a delay time, it's animated! 0 means false positive.
+      , head: 3
+      , tail: 5
+    }
 ;
 
-util.inherits(AnimatedGifDetector, Writable);
+inherits(AnimatedGifDetector, Writable);
 function AnimatedGifDetector(buffer, options) {
@@ -16,5 +33,6 @@ Writable.call(this, options);
   for (var i = 0; i < buffer.length; i++) {
-    result = pointer == '00' &&
-             buffer.toString('hex', i, i + 1) == '21' &&
-             buffer.toString('hex', i + 1, i + 2) == 'f9';
+    result = pointer == BLOCK_TERMINATOR.value &&
+             buffer.toString('hex', i + EXTENSION_INTRODUCER.head, i + EXTENSION_INTRODUCER.tail) == EXTENSION_INTRODUCER.value &&
+             buffer.toString('hex', i + GRAPHIC_CONTROL_LABEL.head, i + GRAPHIC_CONTROL_LABEL.tail) == GRAPHIC_CONTROL_LABEL.value &&
+             buffer.toString('hex', i + DELAY_TIME.head, i + DELAY_TIME.tail) > DELAY_TIME.value;
     pointer = buffer.toString('hex', i, i + 1);
@@ -24,2 +42,3 @@ if (result)
   }
+
   return { pointer: pointer, animated: result };
@@ -26,0 +45,0 @@ }

package.json

 {
   "name": "animated-gif-detector",
-  "version": "0.3.0",
+  "version": "1.0.0",
   "description": "Detect animated GIFs from JavaScript buffers.",
@@ -17,3 +17,5 @@ "main": "index.js",
   },
-  "dependencies": {},
+  "dependencies": {
+    "inherits": "^2.0.1"
+  },
   "repository": {
@@ -20,0 +22,0 @@ "type": "git",

test/index.test.js

@@ -79,2 +79,146 @@ var path = require('path')
 
+test('postcard.gif', function(t) {
+  var file = path.join(process.cwd(), 'test', 'files', 'postcard.gif')
+    , result = false
+  ;
+  fs.createReadStream(file)
+    .pipe(animated())
+    .once('animated', function() { result = true; })
+    .on('finish', function() {
+      t.notOk(result, 'is NOT animated');
+      t.end();
+    });
+});
+
+test('1E3A0FFF2F0ED7F3DD8DAE5CC461494E.gif', function(t) {
+  var file = path.join(process.cwd(), 'test', 'files', '1E3A0FFF2F0ED7F3DD8DAE5CC461494E.gif')
+    , result = false
+  ;
+  fs.createReadStream(file)
+    .pipe(animated())
+    .once('animated', function() { result = true; })
+    .on('finish', function() {
+      t.notOk(result, 'is NOT animated');
+      t.end();
+    });
+});
+
+test('09_24_14_Better_Together_GC_Event_FD.gif', function(t) {
+  var file = path.join(process.cwd(), 'test', 'files', '09_24_14_Better_Together_GC_Event_FD.gif')
+    , result = false
+  ;
+  fs.createReadStream(file)
+    .pipe(animated())
+    .once('animated', function() { result = true; })
+    .on('finish', function() {
+      t.notOk(result, 'is NOT animated');
+      t.end();
+    });
+});
+
+test('21.gif', function(t) {
+  var file = path.join(process.cwd(), 'test', 'files', '21.gif')
+    , result = false
+  ;
+  fs.createReadStream(file)
+    .pipe(animated())
+    .once('animated', function() { result = true; })
+    .on('finish', function() {
+      t.notOk(result, 'is NOT animated');
+      t.end();
+    });
+});
+
+
+test('calendar_265x230.gif', function(t) {
+  var file = path.join(process.cwd(), 'test', 'files', 'calendar_265x230.gif')
+    , result = false
+  ;
+  fs.createReadStream(file)
+    .pipe(animated())
+    .once('animated', function() { result = true; })
+    .on('finish', function() {
+      t.notOk(result, 'is NOT animated');
+      t.end();
+    });
+});
+
+test('2026556_rw_nl_160X250.gif', function(t) {
+  var file = path.join(process.cwd(), 'test', 'files', '2026556_rw_nl_160X250.gif')
+    , result = false
+  ;
+  fs.createReadStream(file)
+    .pipe(animated())
+    .once('animated', function() { result = true; })
+    .on('finish', function() {
+      t.notOk(result, 'is NOT animated');
+      t.end();
+    });
+});
+
+test('connections.gif', function(t) {
+  var file = path.join(process.cwd(), 'test', 'files', 'connections.gif')
+    , result = false
+  ;
+  fs.createReadStream(file)
+    .pipe(animated())
+    .once('animated', function() { result = true; })
+    .on('finish', function() {
+      t.notOk(result, 'is NOT animated');
+      t.end();
+    });
+});
+
+test('block-7.gif', function(t) {
+  var file = path.join(process.cwd(), 'test', 'files', 'block-7.gif')
+    , result = false
+  ;
+  fs.createReadStream(file)
+    .pipe(animated())
+    .once('animated', function() { result = true; })
+    .on('finish', function() {
+      t.notOk(result, 'is NOT animated');
+      t.end();
+    });
+});
+
+test('PSP14_728-x-90_HOUZZ.gif', function(t) {
+  var file = path.join(process.cwd(), 'test', 'files', 'PSP14_728-x-90_HOUZZ.gif')
+    , result = false
+  ;
+  fs.createReadStream(file)
+    .pipe(animated())
+    .once('animated', function() { result = true; })
+    .on('finish', function() {
+      t.notOk(result, 'is NOT animated');
+      t.end();
+    });
+});
+
+test('daily-idea-header.gif', function(t) {
+  var file = path.join(process.cwd(), 'test', 'files', 'daily-idea-header.gif')
+    , result = false
+  ;
+  fs.createReadStream(file)
+    .pipe(animated())
+    .once('animated', function() { result = true; })
+    .on('finish', function() {
+      t.notOk(result, 'is NOT animated');
+      t.end();
+    });
+});
+
+test('b_cc_email14.gif', function(t) {
+  var file = path.join(process.cwd(), 'test', 'files', 'b_cc_email14.gif')
+    , result = false
+  ;
+  fs.createReadStream(file)
+    .pipe(animated())
+    .once('animated', function() { result = true; })
+    .on('finish', function() {
+      t.notOk(result, 'is NOT animated');
+      t.end();
+    });
+});
+
 test('sync => true', function(t) {
@@ -81,0 +225,0 @@ var filePath = path.join(process.cwd(), 'test', 'files', 'example.gif');

New alerts

License Policy Violation

License

This package is not allowed per your license policy. Review the package's license to ensure compliance.

Found 1 instance in 1 package

Fixed alerts

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License

This package is not allowed per your license policy. Review the package's license to ensure compliance.

Found 1 instance in 1 package

No v1

Quality

Package is not semver >=1. This means it is not stable and does not support ^ ranges.

Found 1 instance in 1 package

Improved metrics

Total package byte prevSize

1533498

increased by35.97%

Number of package files

25

increased by78.57%

Lines of code

303

increased by98.04%

Number of low quality alerts

0

decreased by-100%

Worsened metrics

Dependency count

1

increased byInfinity%

Dependency changes

• + Addedinherits@^2.0.1

• + Addedinherits@2.0.4(transitive)