Add support for prft box (Producer Reference Time)

Dash-Industry-Forum · Jan 3, 2023 · ee70408 · ee70408
1 parent 7dd4434
commit ee70408
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diff --git a/src/processors/prft.js b/src/processors/prft.js
@@ -0,0 +1,7 @@
+// ISO/IEC 14496-12:2012 - 8.16.5 Producer Reference Time
+ISOBox.prototype._boxProcessors['prft'] = function() {
+  this._procFullBox();
+  this._procField('reference_track_ID', 'uint', 32);
+  this._procField('ntp_timestamp', 'uint', 64);
+  this._procField('media_time', 'uint', (this.version == 1) ? 64 : 32);
+};
diff --git a/test/fixtures/dash-chunks-prft.m4s b/test/fixtures/dash-chunks-prft.m4s
diff --git a/test/spec/boxes_spec.js b/test/spec/boxes_spec.js
@@ -334,4 +334,16 @@ describe('Text samples', function() {
       expect(boxes[0].entries[0].location).toEqual('');
     });
   });
+
+  describe('prft box', function() {
+    it('should correctly parse the box from sample data', function() {
+      var parsedFile  = loadParsedFixture('./test/fixtures/dash-chunks-prft.m4s');
+      var boxes = parsedFile.fetchAll('prft');
+      expect(boxes.length).toEqual(60);
+      expect(boxes[0].type).toEqual('prft');
+      expect(boxes[0].reference_track_ID).toEqual(1);
+      expect(boxes[0].ntp_timestamp).toEqual(16662305022071450000);
+      expect(boxes[0].media_time).toEqual(1355974620);
+    });
+  });
 });