Add new atom types: SampleSize, TrackExtends, OriginalFormat, SchemeType, and SchemeInfo.

[movie_parser.git] / Atom.js

diff --git a/Atom.js b/Atom.js
index 2fc62ef76f9cb86fb6b7fab005807e935e8c5379..8a73803fd4bc2d5a0f21c0c50958f80f1f1f7370 100644 (file)
--- a/Atom.js
+++ b/Atom.js
@@ -1,26 +1,34 @@
-var Atom = function(buffer, offset) {
+var Atom = function (buffer, offset) {

     this.setDefaults();
     return this.parse(buffer, offset) ? this : null;
 };
 
     this.setDefaults();
     return this.parse(buffer, offset) ? this : null;
 };
 

-Atom.create = function(buffer, offset) {
+Atom.create = function (buffer, offset) {

     // 'offset' is optional.
     // 'offset' is optional.

-    if (arguments.length < 2)
+    if (arguments.length < 2) {

         offset = 0;
         offset = 0;

+    }

 
     if (buffer.byteLength - offset < this.minimumSize)
         return null;
 
     var typeArrayView = new Uint8Array(buffer, offset + 4, 4);
     var type = String.fromCharCode.apply(null, typeArrayView);
 
     if (buffer.byteLength - offset < this.minimumSize)
         return null;
 
     var typeArrayView = new Uint8Array(buffer, offset + 4, 4);
     var type = String.fromCharCode.apply(null, typeArrayView);

+    var atom;

 
     switch (type) {
         case 'ftyp':
             return new FileTypeAtom(buffer, offset);
         case 'moov':
 
     switch (type) {
         case 'ftyp':
             return new FileTypeAtom(buffer, offset);
         case 'moov':

+            return new ContainerAtom(buffer, offset, 'Movie Atom');

         case 'trak':
         case 'trak':

+            return new ContainerAtom(buffer, offset, 'Track Atom');

         case 'mdia':
         case 'mdia':

+            return new ContainerAtom(buffer, offset, 'Media Atom');

         case 'minf':
         case 'minf':

+            return new ContainerAtom(buffer, offset, 'Media Info Atom');
+        case 'mvex':
+            return new ContainerAtom(buffer, offset, 'Movie Extends Atom');

         case 'stbl':
             return new ContainerAtom(buffer, offset);
         case 'mvhd':
         case 'stbl':
             return new ContainerAtom(buffer, offset);
         case 'mvhd':


@@ -33,16 +41,30 @@ Atom.create = function(buffer, offset) {
             return new SyncSampleAtom(buffer, offset);
         case 'stts':
             return new TimeToSampleAtom(buffer, offset);
             return new SyncSampleAtom(buffer, offset);
         case 'stts':
             return new TimeToSampleAtom(buffer, offset);

+        case 'stsz':
+            return new SampleSizeAtom(buffer, offset);
+        case 'trex':
+            return new TrackExtendsAtom(buffer, offset);
+        case 'sinf':
+            return new ContainerAtom(buffer, offset, 'Protection Scheme Info Atom');
+        case 'ipro':
+            return new ContainerAtom(buffer, offset, 'Item Protection Atom');
+        case 'frma':
+            return new OriginalFormatBox(buffer, offset);
+        case 'schm':
+            return new SchemeTypeBox(buffer, offset);
+        case 'schi':
+            return new SchemeInfoBox(Buffer, offset);

         default:
             return new Atom(buffer, offset);
     }
         default:
             return new Atom(buffer, offset);
     }

-}
+};

 
 

-Atom.prototype.super = function(object) {
+Atom.prototype.super = function (object) {

     return Object.getPrototypeOf(object.prototype);
     return Object.getPrototypeOf(object.prototype);

-}
+};

 
 

-Atom.prototype.setDefaults = function() {
+Atom.prototype.setDefaults = function () {

     Object.defineProperty(this, "is64bit", {
             value: false,
             writable: true,
     Object.defineProperty(this, "is64bit", {
             value: false,
             writable: true,


@@ -61,20 +83,29 @@ Atom.prototype.setDefaults = function() {
             enumerable: false,
             configurable: true,
         });
             enumerable: false,
             configurable: true,
         });

+    Object.defineProperty(this, "description", {
+            value: "Undifferentiated Atom",
+            writable: true,
+            enumerable: false,
+            configurable: true,
+        });
+    this.offset = 0;

     this.size = 0;
     this.type = '';
     this.size = 0;
     this.type = '';

-}
+};

 
 

-Atom.prototype.parse = function(buffer, offset) {
+Atom.prototype.parse = function (buffer, offset) {

     // 'offset' is optional.
     if (typeof(offset) == 'undefined')
         offset = 0;
 
     // 'offset' is optional.
     if (typeof(offset) == 'undefined')
         offset = 0;
 

+    this.offset = offset;
+

     if (buffer.byteLength - offset < this.minimumSize)
     if (buffer.byteLength - offset < this.minimumSize)

-        return 0;
+        throw 'Buffer not long enough';

 
     var view = new DataView(buffer, offset, 4);
 
     var view = new DataView(buffer, offset, 4);

-    headerOffset = 0;
+    var headerOffset = 0;

 
     this.size = view.getUint32(0);
     headerOffset += 4;
 
     this.size = view.getUint32(0);
     headerOffset += 4;


@@ -86,7 +117,7 @@ Atom.prototype.parse = function(buffer, offset) {
     if (this.size == 1) {
         this.is64bit = true;
         if (buffer.byteLength - offset < 8)
     if (this.size == 1) {
         this.is64bit = true;
         if (buffer.byteLength - offset < 8)

-            return false;
+            throw 'Malformed extended size field';

 
         // NOTE: JavaScript can only represent up to 2^53 as precise integer.
         // This calculation may result in incorrect values.
 
         // NOTE: JavaScript can only represent up to 2^53 as precise integer.
         // This calculation may result in incorrect values.


@@ -100,61 +131,59 @@ Atom.prototype.parse = function(buffer, offset) {
     return headerOffset;
 };
 
     return headerOffset;
 };
 

-Atom.prototype.getAtomByType = function(type) {
+Atom.prototype.getAtomByType = function (type) {

     if (typeof(this.childAtoms) == 'undefined')
         return null;
 
     // Bredth first
     if (typeof(this.childAtoms) == 'undefined')
         return null;
 
     // Bredth first

-    for (index in this.childAtoms) {
+    for (var index in this.childAtoms) {

         if (this.childAtoms[index].type == type)
             return this.childAtoms[index];
     }
 
     var result = null;
         if (this.childAtoms[index].type == type)
             return this.childAtoms[index];
     }
 
     var result = null;

-    for (index in this.childAtoms) {
-        if (result = this.childAtoms[index].getAtomsByType(type))
+    for (var index in this.childAtoms) {
+        if (result = this.childAtoms[index].getAtomByType(type))

             break;
     }
     return result;
 };
 
             break;
     }
     return result;
 };
 

-Atom.prototype.getAtomsByType = function(type) {
+Atom.prototype.getAtomsByType = function (type) {

     if (typeof(this.childAtoms) == 'undefined')
         return [];
 
     var result = [];
 
     // Bredth first
     if (typeof(this.childAtoms) == 'undefined')
         return [];
 
     var result = [];
 
     // Bredth first

-    for (index in this.childAtoms) {
+    for (var index in this.childAtoms) {

         if (this.childAtoms[index].type == type)
             result.push(this.childAtoms[index]);
     }
 
         if (this.childAtoms[index].type == type)
             result.push(this.childAtoms[index]);
     }
 

-    for (index in this.childAtoms)
+    for (var index in this.childAtoms)

         result = result.concat(this.childAtoms[index].getAtomsByType(type));
 
     return result;
 };
 
         result = result.concat(this.childAtoms[index].getAtomsByType(type));
 
     return result;
 };
 

-var FileTypeAtom = function(buffer, offset) {
+var FileTypeAtom = function (buffer, offset) {

     this.super(FileTypeAtom).constructor.call(this, buffer, offset);
 }
 
 FileTypeAtom.prototype = Object.create(Atom.prototype);
 
     this.super(FileTypeAtom).constructor.call(this, buffer, offset);
 }
 
 FileTypeAtom.prototype = Object.create(Atom.prototype);
 

-FileTypeAtom.prototype.setDefaults = function() {
+FileTypeAtom.prototype.setDefaults = function () {

     this.super(FileTypeAtom).setDefaults.call(this);
     this.super(FileTypeAtom).setDefaults.call(this);

+    this.description = "File Type Atom";

     this.minimumSize = 16;
     this.brand = "";
     this.version = 0;
     this.compatible_brands = [];
 }
 
     this.minimumSize = 16;
     this.brand = "";
     this.version = 0;
     this.compatible_brands = [];
 }
 

-FileTypeAtom.prototype.parse = function(buffer, offset) {
+FileTypeAtom.prototype.parse = function (buffer, offset) {

     var headerOffset = this.super(FileTypeAtom).parse.call(this, buffer, offset);
     var headerOffset = this.super(FileTypeAtom).parse.call(this, buffer, offset);

-    if (!headerOffset)
-        return 0;
-

     var view = new DataView(buffer, offset, this.size);
 
     var brandArrayView = new Uint8Array(buffer, offset + headerOffset, 4);
     var view = new DataView(buffer, offset, this.size);
 
     var brandArrayView = new Uint8Array(buffer, offset + headerOffset, 4);


@@ -173,22 +202,21 @@ FileTypeAtom.prototype.parse = function(buffer, offset) {
     return true;
 }
 
     return true;
 }
 

-var ContainerAtom = function(buffer, offset) {
-    this.super(ContainerAtom).constructor.call(this, buffer, offset);
+var ContainerAtom = function (buffer, offset, description) {
+    var atom = this.super(ContainerAtom).constructor.call(this, buffer, offset);
+    atom.description = description;
+    return;

 }
 
 ContainerAtom.prototype = Object.create(Atom.prototype);
 
 }
 
 ContainerAtom.prototype = Object.create(Atom.prototype);
 

-ContainerAtom.prototype.setDefaults = function() {
+ContainerAtom.prototype.setDefaults = function () {

     this.super(ContainerAtom).setDefaults.call(this);
     this.childAtoms = [];
 }
 
     this.super(ContainerAtom).setDefaults.call(this);
     this.childAtoms = [];
 }
 

-ContainerAtom.prototype.parse = function(buffer, offset) {
+ContainerAtom.prototype.parse = function (buffer, offset) {

     var headerOffset = this.super(ContainerAtom).parse.call(this, buffer, offset);
     var headerOffset = this.super(ContainerAtom).parse.call(this, buffer, offset);

-    if (!headerOffset)
-        return 0;
-

     while (headerOffset < this.size) {
         var childAtom = Atom.create(buffer, offset + headerOffset);
         if (!childAtom)
     while (headerOffset < this.size) {
         var childAtom = Atom.create(buffer, offset + headerOffset);
         if (!childAtom)


@@ -197,25 +225,23 @@ ContainerAtom.prototype.parse = function(buffer, offset) {
         this.childAtoms.push(childAtom);
         childAtom.parent = this;
     }
         this.childAtoms.push(childAtom);
         childAtom.parent = this;
     }

+       return headerOffset;

 }
 
 }
 

-var VersionFlagsAtom = function(buffer, offset) {
+var VersionFlagsAtom = function (buffer, offset) {

     this.super(VersionFlagsAtom).constructor.call(this, buffer, offset);
 }
 
 VersionFlagsAtom.prototype = Object.create(Atom.prototype);
 
     this.super(VersionFlagsAtom).constructor.call(this, buffer, offset);
 }
 
 VersionFlagsAtom.prototype = Object.create(Atom.prototype);
 

-VersionFlagsAtom.prototype.setDefaults = function() {
+VersionFlagsAtom.prototype.setDefaults = function () {

     this.super(VersionFlagsAtom).setDefaults.call(this);
     this.version = 0;
     this.flags = 0;
 }
 
     this.super(VersionFlagsAtom).setDefaults.call(this);
     this.version = 0;
     this.flags = 0;
 }
 

-VersionFlagsAtom.prototype.parse = function(buffer, offset) {
+VersionFlagsAtom.prototype.parse = function (buffer, offset) {

     var headerOffset = this.super(VersionFlagsAtom).parse.call(this, buffer, offset);
     var headerOffset = this.super(VersionFlagsAtom).parse.call(this, buffer, offset);

-    if (!headerOffset)
-        return 0;
-

     var view = new DataView(buffer, offset);
 
     this.version = view.getUint8(headerOffset);
     var view = new DataView(buffer, offset);
 
     this.version = view.getUint8(headerOffset);


@@ -228,14 +254,15 @@ VersionFlagsAtom.prototype.parse = function(buffer, offset) {
     return headerOffset;
 }
 
     return headerOffset;
 }
 

-var MovieHeaderAtom = function(buffer, offset) {
+var MovieHeaderAtom = function (buffer, offset) {

     return this.super(MovieHeaderAtom).constructor.call(this, buffer, offset);
 }
 
 MovieHeaderAtom.prototype = Object.create(VersionFlagsAtom.prototype);
 
     return this.super(MovieHeaderAtom).constructor.call(this, buffer, offset);
 }
 
 MovieHeaderAtom.prototype = Object.create(VersionFlagsAtom.prototype);
 

-MovieHeaderAtom.prototype.setDefaults = function() {
+MovieHeaderAtom.prototype.setDefaults = function () {

     this.super(MovieHeaderAtom).setDefaults.call(this);
     this.super(MovieHeaderAtom).setDefaults.call(this);

+    this.description = "Movie Header Atom";

     this.creationTime = 0;
     this.modificationTime = 0;
     this.timeScale = 0;
     this.creationTime = 0;
     this.modificationTime = 0;
     this.timeScale = 0;


@@ -250,11 +277,8 @@ MovieHeaderAtom.prototype.setDefaults = function() {
     this.nextTrackID = 0;
 }
 
     this.nextTrackID = 0;
 }
 

-MovieHeaderAtom.prototype.parse = function(buffer, offset) {
+MovieHeaderAtom.prototype.parse = function (buffer, offset) {

     var headerOffset = this.super(MovieHeaderAtom).parse.call(this, buffer, offset);
     var headerOffset = this.super(MovieHeaderAtom).parse.call(this, buffer, offset);

-    if (!headerOffset)
-        return 0;
-

     var view = new DataView(buffer, offset);
 
     this.creationTime = new Date(view.getUint32(headerOffset)*1000 + Date.UTC(1904, 0, 1));
     var view = new DataView(buffer, offset);
 
     this.creationTime = new Date(view.getUint32(headerOffset)*1000 + Date.UTC(1904, 0, 1));


@@ -328,15 +352,16 @@ MovieHeaderAtom.prototype.parse = function(buffer, offset) {
     return true;
 }
 
     return true;
 }
 

-var TrackHeaderAtom = function(buffer, offset) {
+var TrackHeaderAtom = function (buffer, offset) {

     this.super(TrackHeaderAtom).constructor.call(this, buffer, offset);
 }
 
 TrackHeaderAtom.prototype = Object.create(VersionFlagsAtom.prototype);
 
     this.super(TrackHeaderAtom).constructor.call(this, buffer, offset);
 }
 
 TrackHeaderAtom.prototype = Object.create(VersionFlagsAtom.prototype);
 

-TrackHeaderAtom.prototype.setDefaults = function() {
+TrackHeaderAtom.prototype.setDefaults = function () {

     this.super(TrackHeaderAtom).setDefaults.call(this);
 
     this.super(TrackHeaderAtom).setDefaults.call(this);
 

+    this.description = "Track Header Atom";

     this.creationTime = 0;
     this.modificationTime = 0;
     this.trackID = 0;
     this.creationTime = 0;
     this.modificationTime = 0;
     this.trackID = 0;


@@ -349,11 +374,8 @@ TrackHeaderAtom.prototype.setDefaults = function() {
     this.height = 0;
 }
 
     this.height = 0;
 }
 

-TrackHeaderAtom.prototype.parse = function(buffer, offset) {
+TrackHeaderAtom.prototype.parse = function (buffer, offset) {

     var headerOffset = this.super(TrackHeaderAtom).parse.call(this, buffer, offset);
     var headerOffset = this.super(TrackHeaderAtom).parse.call(this, buffer, offset);

-    if (!headerOffset)
-        return 0;
-

     var view = new DataView(buffer, offset);
 
     this.creationTime = new Date(view.getUint32(headerOffset)*1000 + Date.UTC(1904, 0, 1));
     var view = new DataView(buffer, offset);
 
     this.creationTime = new Date(view.getUint32(headerOffset)*1000 + Date.UTC(1904, 0, 1));


@@ -424,15 +446,16 @@ TrackHeaderAtom.prototype.parse = function(buffer, offset) {
     headerOffset += 4;
 }
 
     headerOffset += 4;
 }
 

-var MediaHeaderAtom = function(buffer, offset) {
+var MediaHeaderAtom = function (buffer, offset) {

     this.super(MediaHeaderAtom).constructor.call(this, buffer, offset);
 }
 
 MediaHeaderAtom.prototype = Object.create(VersionFlagsAtom.prototype);
 
     this.super(MediaHeaderAtom).constructor.call(this, buffer, offset);
 }
 
 MediaHeaderAtom.prototype = Object.create(VersionFlagsAtom.prototype);
 

-MediaHeaderAtom.prototype.setDefaults = function() {
+MediaHeaderAtom.prototype.setDefaults = function () {

     this.super(MediaHeaderAtom).setDefaults.call(this);
 
     this.super(MediaHeaderAtom).setDefaults.call(this);
 

+    this.description = "Media Header Atom";

     this.creationTime = 0;
     this.modificationTime = 0;
     this.timeScale = 0;
     this.creationTime = 0;
     this.modificationTime = 0;
     this.timeScale = 0;


@@ -441,11 +464,8 @@ MediaHeaderAtom.prototype.setDefaults = function() {
     this.quality = 0;
 }
 
     this.quality = 0;
 }
 

-MediaHeaderAtom.prototype.parse = function(buffer, offset) {
+MediaHeaderAtom.prototype.parse = function (buffer, offset) {

     var headerOffset = this.super(MediaHeaderAtom).parse.call(this, buffer, offset);
     var headerOffset = this.super(MediaHeaderAtom).parse.call(this, buffer, offset);

-    if (!headerOffset)
-        return 0;
-

     var view = new DataView(buffer, offset);
 
     this.creationTime = new Date(view.getUint32(headerOffset)*1000 + Date.UTC(1904, 0, 1));
     var view = new DataView(buffer, offset);
 
     this.creationTime = new Date(view.getUint32(headerOffset)*1000 + Date.UTC(1904, 0, 1));


@@ -465,28 +485,26 @@ MediaHeaderAtom.prototype.parse = function(buffer, offset) {
 
     this.quality = view.getUint16(headerOffset);
     headerOffset += 2;
 
     this.quality = view.getUint16(headerOffset);
     headerOffset += 2;

-}
+};

 
 

-var SyncSampleAtom = function(buffer, offset) {
+var SyncSampleAtom = function (buffer, offset) {

     this.super(SyncSampleAtom).constructor.call(this, buffer, offset);
     this.super(SyncSampleAtom).constructor.call(this, buffer, offset);

-}
+};

 
 SyncSampleAtom.prototype = Object.create(Atom.prototype);
 
 
 SyncSampleAtom.prototype = Object.create(Atom.prototype);
 

-SyncSampleAtom.prototype.setDefaults = function() {
+SyncSampleAtom.prototype.setDefaults = function () {

     this.super(SyncSampleAtom).setDefaults.call(this);
 
     this.super(SyncSampleAtom).setDefaults.call(this);
 

+    this.description = "Sync Sample Atom";

     this.version = 0;
     this.flags = 0;
     this.entries = 0;
     this.syncSamples = [];
     this.version = 0;
     this.flags = 0;
     this.entries = 0;
     this.syncSamples = [];

-}
+};

 
 

-SyncSampleAtom.prototype.parse = function(buffer, offset) {
+SyncSampleAtom.prototype.parse = function (buffer, offset) {

     var headerOffset = this.super(SyncSampleAtom).parse.call(this, buffer, offset);
     var headerOffset = this.super(SyncSampleAtom).parse.call(this, buffer, offset);

-    if (!headerOffset)
-        return 0;
-

     var view = new DataView(buffer, offset);
 
     this.version = view.getUint8(headerOffset);
     var view = new DataView(buffer, offset);
 
     this.version = view.getUint8(headerOffset);


@@ -499,41 +517,45 @@ SyncSampleAtom.prototype.parse = function(buffer, offset) {
     this.entries = view.getUint32(headerOffset);
     headerOffset += 4;
 
     this.entries = view.getUint32(headerOffset);
     headerOffset += 4;
 

+    this.syncSamples = new Uint32Array(this.entries);
+    var i = 0;

     while (headerOffset < this.size) {
         var sampleNumber = view.getUint32(headerOffset);
         headerOffset += 4;
     while (headerOffset < this.size) {
         var sampleNumber = view.getUint32(headerOffset);
         headerOffset += 4;

-        this.syncSamples.push(sampleNumber);
+        this.syncSamples[i] = sampleNumber;
+        ++i;

     }
     }

-}
+};

 
 

-var TimeToSampleAtom = function(buffer, offset) {
+var TimeToSampleAtom = function (buffer, offset) {

     this.super(TimeToSampleAtom).constructor.call(this, buffer, offset);
     this.super(TimeToSampleAtom).constructor.call(this, buffer, offset);

-}
+};

 
 TimeToSampleAtom.prototype = Object.create(VersionFlagsAtom.prototype);
 
 
 TimeToSampleAtom.prototype = Object.create(VersionFlagsAtom.prototype);
 

-TimeToSampleAtom.prototype.setDefaults = function() {
+TimeToSampleAtom.prototype.setDefaults = function () {

     this.super(TimeToSampleAtom).setDefaults.call(this);
 
     this.super(TimeToSampleAtom).setDefaults.call(this);
 

+    this.description = "Time-to-Sample Atom";

     this.entries = 0;
     
     Object.defineProperty(this, "timeToSamples", {
     this.entries = 0;
     
     Object.defineProperty(this, "timeToSamples", {

-        value: [],
+        value: null,

         writable: true,
         enumerable: false,
         configurable: true,
     });
 }
 
         writable: true,
         enumerable: false,
         configurable: true,
     });
 }
 

-TimeToSampleAtom.prototype.parse = function(buffer, offset) {
+TimeToSampleAtom.prototype.parse = function (buffer, offset) {

     var headerOffset = this.super(TimeToSampleAtom).parse.call(this, buffer, offset);
     var headerOffset = this.super(TimeToSampleAtom).parse.call(this, buffer, offset);

-    if (!headerOffset)
-        return 0;
-

     var view = new DataView(buffer, offset);
 
     this.entries = view.getUint32(headerOffset);
     var view = new DataView(buffer, offset);
 
     this.entries = view.getUint32(headerOffset);

-        headerOffset += 4;
+    headerOffset += 4;
+
+    this.timeToSamples = new Array(this.entries);
+    var i = 0;

 
     while (headerOffset < this.size) {
         var sampleCount = view.getUint32(headerOffset);
 
     while (headerOffset < this.size) {
         var sampleCount = view.getUint32(headerOffset);


@@ -542,6 +564,155 @@ TimeToSampleAtom.prototype.parse = function(buffer, offset) {
         var sampleDuration = view.getUint32(headerOffset);
         headerOffset += 4;
 
         var sampleDuration = view.getUint32(headerOffset);
         headerOffset += 4;
 

-        this.timeToSamples.push([sampleCount, sampleDuration]);
+        this.timeToSamples[i] = [sampleCount, sampleDuration];
+        ++i;
+    }
+}
+
+var SampleSizeAtom = function (buffer, offset) {
+    this.super(SampleSizeAtom).constructor.call(this, buffer, offset);
+}
+
+SampleSizeAtom.prototype = Object.create(VersionFlagsAtom.prototype);
+
+SampleSizeAtom.prototype.setDefaults = function () {
+    this.super(SampleSizeAtom).setDefaults.call(this);
+
+    this.description = "Sample Size Atom";
+    this.sampleSize = 0;
+    this.entries = 0;
+    
+    Object.defineProperty(this, "sampleSizes", {
+        value: null,
+        writable: true,
+        enumerable: false,
+        configurable: true,
+    });
+}
+
+SampleSizeAtom.prototype.parse = function (buffer, offset) {
+    var headerOffset = this.super(SampleSizeAtom).parse.call(this, buffer, offset);
+    var view = new DataView(buffer, offset);
+
+    this.sampleSize = view.getUint32(headerOffset);
+    headerOffset += 4;
+
+    this.entries = view.getUint32(headerOffset);
+    headerOffset += 4;
+
+    this.sampleSizes = new Uint32Array(this.entries);
+    var i = 0;
+
+    while (headerOffset < this.size) {
+        this.sampleSizes[i] = view.getUint32(headerOffset);
+        headerOffset += 4;
+        ++i;
+    }
+}
+
+var TrackExtendsAtom = function (buffer, offset) {
+    this.super(TrackExtendsAtom).constructor.call(this, buffer, offset);
+}
+
+TrackExtendsAtom.prototype = Object.create(VersionFlagsAtom.prototype);
+
+TrackExtendsAtom.prototype.setDefaults = function () {
+    this.super(TrackExtendsAtom).setDefaults.call(this);
+
+    this.description = "Track Extends Atom";
+    this.trackID = 0;
+    this.default_sample_description_index = 0;
+    this.default_sample_duration = 0;
+    this.default_sample_size = 0;
+    this.default_sample_flags = 0;
+}
+
+TrackExtendsAtom.prototype.parse = function (buffer, offset) {
+    var headerOffset = this.super(TrackExtendsAtom).parse.call(this, buffer, offset);
+    var view = new DataView(buffer, offset);
+
+    this.trackID = view.getUint32(headerOffset);
+    headerOffset += 4;
+
+    this.default_sample_description_index = view.getUint32(headerOffset);
+    headerOffset += 4;
+
+    this.default_sample_duration = view.getUint32(headerOffset);
+    headerOffset += 4;
+
+    this.default_sample_size = view.getUint32(headerOffset);
+    headerOffset += 4;
+
+    this.default_sample_flags = view.getUint32(headerOffset);
+    headerOffset += 4;
+}
+
+var OriginalFormatBox = function (buffer, offset) {
+    this.super(OriginalFormatBox).constructor.call(this, buffer, offset);
+}
+
+OriginalFormatBox.prototype = Object.create(Atom.prototype);
+
+OriginalFormatBox.prototype.setDefaults = function () {
+    this.super(OriginalFormatBox).setDefaults.call(this);
+
+    this.description = "Original Format Box";
+    this.dataFormat = 0;
+}
+
+OriginalFormatBox.prototype.parse = function (buffer, offset) {
+    var headerOffset = this.super(OriginalFormatBox).parse.call(this, buffer, offset);
+    var view = new DataView(buffer, offset);
+
+    this.dataFormat = view.getUint32(headerOffset);
+    headerOffset += 4;
+}
+
+var SchemeTypeBox = function (buffer, offset) {
+    this.super(SchemeTypeBox).constructor.call(this, buffer, offset);
+}
+
+SchemeTypeBox.prototype = Object.create(VersionFlagsAtom.prototype);
+
+SchemeTypeBox.prototype.setDefaults = function () {
+    this.super(SchemeTypeBox).setDefaults.call(this);
+
+    this.description = "Scheme Type Box";
+    this.schemeType = 0;
+    this.schemeVersion = 0;
+    this.schemeURL = 0;
+}
+
+SchemeTypeBox.prototype.parse = function (buffer, offset) {
+    var headerOffset = this.super(SchemeTypeBox).parse.call(this, buffer, offset);
+    var view = new DataView(buffer, offset);
+
+    this.schemeType = view.getUint32(headerOffset);
+    headerOffset += 4;
+    this.schemeVersion = view.getUint32(headerOffset);
+    headerOffset += 4;
+    if (this.flags & 0x1) {
+        var array = new Uint8Array(buffer, headerOffset, this.size - headerOffset);
+        this.schemeURL = String.fromCharCode.apply(null, array);

     }
     }

-}
\ No newline at end of file
+}
+
+var SchemeInfoBox = function (buffer, offset) {
+    this.super(SchemeInfoBox).constructor.call(this, buffer, offset);
+}
+
+SchemeInfoBox.prototype = Object.create(VersionFlagsAtom.prototype);
+
+SchemeInfoBox.prototype.setDefaults = function () {
+    this.super(SchemeInfoBox).setDefaults.call(this);
+
+    this.description = "Scheme Information Box";
+    this.schemeSpecificData = 0;
+}
+
+SchemeInfoBox.prototype.parse = function (buffer, offset) {
+    var headerOffset = this.super(SchemeInfoBox).parse.call(this, buffer, offset);
+    this.schemeSpecificData = buffer.slice(headerOffset, this.size - headerOffset);
+}
+
+