codem-isoboxer - npm Package Compare versions

Comparing version 0.2.1 to 0.2.2

CHANGELOG.md

@@ -0,1 +1,6 @@
+## codem-isoboxer 0.2.2 (2016/02/01) ##
+
+* Added support for WebVTT cues (vttC, vttc, vlab, payl, vtte)
+* Updated UTF-8 decoder
+
 ## codem-isoboxer 0.2.1 (2015/07/29) ##
@@ -2,0 +7,0 @@

dist/iso_boxer.js

@@ -1,2 +0,2 @@
-/*! codem-isoboxer v0.2.1 https://github.com/madebyhiro/codem-isoboxer/blob/master/LICENSE.txt */
+/*! codem-isoboxer v0.2.2 https://github.com/madebyhiro/codem-isoboxer/blob/master/LICENSE.txt */
 var ISOBoxer = {};
@@ -10,10 +10,42 @@
 ISOBoxer.Utils.dataViewToString = function(dataView, encoding) {
+  var impliedEncoding = encoding || 'utf-8'
   if (typeof TextDecoder !== 'undefined') {
-    return new TextDecoder(encoding || 'utf-8').decode(dataView);
+    return new TextDecoder(impliedEncoding).decode(dataView);
   }
-  var str = '';
-  for (var i=0; i<dataView.byteLength; i++) {
-    str += String.fromCharCode(dataView.getUint8(i));
-  }    
-  return str;  
+  var a = [];
+  var i = 0;
+  
+  if (impliedEncoding === 'utf-8') {
+    /* The following algorithm is essentially a rewrite of the UTF8.decode at 
+    http://bannister.us/weblog/2007/simple-base64-encodedecode-javascript/
+    */
+  
+    while (i < dataView.byteLength) {
+      var c = dataView.getUint8(i++);
+      if (c < 0x80) {
+        // 1-byte character (7 bits)
+      } else if (c < 0xe0) {
+        // 2-byte character (11 bits)
+        c = (c & 0x1f) << 6;
+        c |= (dataView.getUint8(i++) & 0x3f);
+      } else if (c < 0xf0) {
+        // 3-byte character (16 bits)
+        c = (c & 0xf) << 12;
+        c |= (dataView.getUint8(i++) & 0x3f) << 6;
+        c |= (dataView.getUint8(i++) & 0x3f);
+      } else {
+        // 4-byte character (21 bits)
+        c = (c & 0x7) << 18;
+        c |= (dataView.getUint8(i++) & 0x3f) << 12;
+        c |= (dataView.getUint8(i++) & 0x3f) << 6;
+        c |= (dataView.getUint8(i++) & 0x3f);
+      }
+      a.push(String.fromCharCode(c));
+    }
+  } else { // Just map byte-by-byte (probably wrong)
+    while (i < dataView.byteLength) {
+      a.push(String.fromCharCode(dataView.getUint8(i++)));
+    }
+  }
+  return a.join('');  
 };
@@ -205,6 +237,6 @@
 ISOBox.prototype._boxParsers = {};;
-// Simple container boxes, all from ISO/IEC 14496-12:2012
+// Simple container boxes, all from ISO/IEC 14496-12:2012 except vttc which is from 14496-30.
 [
   'moov', 'trak', 'tref', 'mdia', 'minf', 'stbl', 'edts', 'dinf',
-  'mvex', 'moof', 'traf', 'mfra', 'udta', 'meco', 'strk'
+  'mvex', 'moof', 'traf', 'mfra', 'udta', 'meco', 'strk', 'vttc'
 ].forEach(function(boxType) {
@@ -217,3 +249,4 @@ ISOBox.prototype._boxParsers[boxType] = function() {
   }  
-});
+})
+;
 // ISO/IEC 14496-12:2012 - 8.6.6 Edit List Box
@@ -334,2 +367,8 @@ ISOBox.prototype._boxParsers['elst'] = function() {
 };
+// ISO/IEC 14496-30:2014 - WebVTT Cue Payload Box.
+ISOBox.prototype._boxParsers['payl'] = function() {
+  var cue_text_raw = new DataView(this._raw.buffer, this._cursor.offset, this._raw.byteLength - (this._cursor.offset - this._offset));
+  this.cue_text = ISOBoxer.Utils.dataViewToString(cue_text_raw);
+}
+;
 // ISO/IEC 14496-12:2012 - 8.16.3 Segment Index Box
@@ -458,2 +497,18 @@ ISOBox.prototype._boxParsers['sidx'] = function() {
   }
-}
+};
+// ISO/IEC 14496-30:2014 - WebVTT Source Label Box
+ISOBox.prototype._boxParsers['vlab'] = function() {
+  var source_label_raw = new DataView(this._raw.buffer, this._cursor.offset, this._raw.byteLength - (this._cursor.offset - this._offset));
+  this.source_label = ISOBoxer.Utils.dataViewToString(source_label_raw);
+}
+;
+// ISO/IEC 14496-30:2014 - WebVTT Configuration Box
+ISOBox.prototype._boxParsers['vttC'] = function() {
+  var config_raw = new DataView(this._raw.buffer, this._cursor.offset, this._raw.byteLength - (this._cursor.offset - this._offset));
+  this.config = ISOBoxer.Utils.dataViewToString(config_raw);
+}
+;
+// ISO/IEC 14496-30:2014 - WebVTT Empty Sample Box
+ISOBox.prototype._boxParsers['vtte'] = function() {
+  // Nothing should happen here.
+}

dist/iso_boxer.min.js

@@ -1,2 +0,2 @@
-/*! codem-isoboxer v0.2.1 https://github.com/madebyhiro/codem-isoboxer/blob/master/LICENSE.txt */
-var ISOBoxer={};ISOBoxer.parseBuffer=function(a){return new ISOFile(a).parse()},ISOBoxer.Utils={},ISOBoxer.Utils.dataViewToString=function(a,b){if("undefined"!=typeof TextDecoder)return new TextDecoder(b||"utf-8").decode(a);for(var c="",d=0;d<a.byteLength;d++)c+=String.fromCharCode(a.getUint8(d));return c},"undefined"!=typeof exports&&(exports.parseBuffer=ISOBoxer.parseBuffer,exports.Utils=ISOBoxer.Utils),ISOBoxer.Cursor=function(a){this.offset="undefined"==typeof a?0:a};var ISOFile=function(a){this._raw=new DataView(a),this._cursor=new ISOBoxer.Cursor,this.boxes=[]};ISOFile.prototype.fetch=function(a){var b=this.fetchAll(a,!0);return b.length?b[0]:null},ISOFile.prototype.fetchAll=function(a,b){var c=[];return ISOFile._sweep.call(this,a,c,b),c},ISOFile.prototype.parse=function(){for(this._cursor.offset=0,this.boxes=[];this._cursor.offset<this._raw.byteLength;){var a=ISOBox.parse(this);if("undefined"==typeof a.type)break;this.boxes.push(a)}return this},ISOFile._sweep=function(a,b,c){this.type&&this.type==a&&b.push(this);for(var d in this.boxes){if(b.length&&c)return;ISOFile._sweep.call(this.boxes[d],a,b,c)}};var ISOBox=function(){this._cursor=new ISOBoxer.Cursor};ISOBox.parse=function(a){var b=new ISOBox;return b._offset=a._cursor.offset,b._root=a._root?a._root:a,b._raw=a._raw,b._parent=a,b._parseBox(),a._cursor.offset=b._raw.byteOffset+b._raw.byteLength,b},ISOBox.prototype._readInt=function(a){var b=null;switch(a){case 8:b=this._raw.getInt8(this._cursor.offset-this._raw.byteOffset);break;case 16:b=this._raw.getInt16(this._cursor.offset-this._raw.byteOffset);break;case 32:b=this._raw.getInt32(this._cursor.offset-this._raw.byteOffset);break;case 64:var c=this._raw.getInt32(this._cursor.offset-this._raw.byteOffset),d=this._raw.getInt32(this._cursor.offset-this._raw.byteOffset+4);b=c*Math.pow(2,32)+d}return this._cursor.offset+=a>>3,b},ISOBox.prototype._readUint=function(a){var b=null;switch(a){case 8:b=this._raw.getUint8(this._cursor.offset-this._raw.byteOffset);break;case 16:b=this._raw.getUint16(this._cursor.offset-this._raw.byteOffset);break;case 24:var c=this._raw.getUint16(this._cursor.offset-this._raw.byteOffset),d=this._raw.getUint8(this._cursor.offset-this._raw.byteOffset+2);b=(c<<8)+d;break;case 32:b=this._raw.getUint32(this._cursor.offset-this._raw.byteOffset);break;case 64:var c=this._raw.getUint32(this._cursor.offset-this._raw.byteOffset),d=this._raw.getUint32(this._cursor.offset-this._raw.byteOffset+4);b=c*Math.pow(2,32)+d}return this._cursor.offset+=a>>3,b},ISOBox.prototype._readString=function(a){for(var b="",c=0;a>c;c++){var d=this._readUint(8);b+=String.fromCharCode(d)}return b},ISOBox.prototype._readTerminatedString=function(){for(var a="";;){var b=this._readUint(8);if(0==b)break;a+=String.fromCharCode(b)}return a},ISOBox.prototype._readTemplate=function(a){var b=this._readUint(a/2),c=this._readUint(a/2);return b+c/Math.pow(2,a/2)},ISOBox.prototype._parseBox=function(){if(this._cursor.offset=this._offset,this._offset+8>this._raw.buffer.byteLength)return void(this._root._incomplete=!0);switch(this.size=this._readUint(32),this.type=this._readString(4),1==this.size&&(this.largesize=this._readUint(64)),"uuid"==this.type&&(this.usertype=this._readString(16)),this.size){case 0:this._raw=new DataView(this._raw.buffer,this._offset,this._raw.byteLength-this._cursor.offset);break;case 1:this._offset+this.size>this._raw.buffer.byteLength?(this._incomplete=!0,this._root._incomplete=!0):this._raw=new DataView(this._raw.buffer,this._offset,this.largesize);break;default:this._offset+this.size>this._raw.buffer.byteLength?(this._incomplete=!0,this._root._incomplete=!0):this._raw=new DataView(this._raw.buffer,this._offset,this.size)}!this._incomplete&&this._boxParsers[this.type]&&this._boxParsers[this.type].call(this)},ISOBox.prototype._parseFullBox=function(){this.version=this._readUint(8),this.flags=this._readUint(24)},ISOBox.prototype._boxParsers={},["moov","trak","tref","mdia","minf","stbl","edts","dinf","mvex","moof","traf","mfra","udta","meco","strk"].forEach(function(a){ISOBox.prototype._boxParsers[a]=function(){for(this.boxes=[];this._cursor.offset-this._raw.byteOffset<this._raw.byteLength;)this.boxes.push(ISOBox.parse(this))}}),ISOBox.prototype._boxParsers.elst=function(){this._parseFullBox(),this.entry_count=this._readUint(32),this.entries=[];for(var a=1;a<=this.entry_count;a++){var b={};1==this.version?(b.segment_duration=this._readUint(64),b.media_time=this._readInt(64)):(b.segment_duration=this._readUint(32),b.media_time=this._readInt(32)),b.media_rate_integer=this._readInt(16),b.media_rate_fraction=this._readInt(16),this.entries.push(b)}},ISOBox.prototype._boxParsers.emsg=function(){this._parseFullBox(),this.scheme_id_uri=this._readTerminatedString(),this.value=this._readTerminatedString(),this.timescale=this._readUint(32),this.presentation_time_delta=this._readUint(32),this.event_duration=this._readUint(32),this.id=this._readUint(32),this.message_data=new DataView(this._raw.buffer,this._cursor.offset,this._raw.byteLength-(this._cursor.offset-this._offset))},ISOBox.prototype._boxParsers.free=ISOBox.prototype._boxParsers.skip=function(){this.data=new DataView(this._raw.buffer,this._cursor.offset,this._raw.byteLength-(this._cursor.offset-this._offset))},ISOBox.prototype._boxParsers.ftyp=ISOBox.prototype._boxParsers.styp=function(){for(this.major_brand=this._readString(4),this.minor_versions=this._readUint(32),this.compatible_brands=[];this._cursor.offset-this._raw.byteOffset<this._raw.byteLength;)this.compatible_brands.push(this._readString(4))},ISOBox.prototype._boxParsers.hdlr=function(){this._parseFullBox(),this.pre_defined=this._readUint(32),this.handler_type=this._readString(4),this.reserved=[this._readUint(32),this._readUint(32),this._readUint(32)],this.name=this._readTerminatedString()},ISOBox.prototype._boxParsers.mdat=function(){this.data=new DataView(this._raw.buffer,this._cursor.offset,this._raw.byteLength-(this._cursor.offset-this._offset))},ISOBox.prototype._boxParsers.mdhd=function(){this._parseFullBox(),1==this.version?(this.creation_time=this._readUint(64),this.modification_time=this._readUint(64),this.timescale=this._readUint(32),this.duration=this._readUint(64)):(this.creation_time=this._readUint(32),this.modification_time=this._readUint(32),this.timescale=this._readUint(32),this.duration=this._readUint(32));var a=this._readUint(16);this.pad=a>>15,this.language=String.fromCharCode((a>>10&31)+96,(a>>5&31)+96,(31&a)+96),this.pre_defined=this._readUint(16)},ISOBox.prototype._boxParsers.mfhd=function(){this._parseFullBox(),this.sequence_number=this._readUint(32)},ISOBox.prototype._boxParsers.mvhd=function(){this._parseFullBox(),1==this.version?(this.creation_time=this._readUint(64),this.modification_time=this._readUint(64),this.timescale=this._readUint(32),this.duration=this._readUint(64)):(this.creation_time=this._readUint(32),this.modification_time=this._readUint(32),this.timescale=this._readUint(32),this.duration=this._readUint(32)),this.rate=this._readTemplate(32),this.volume=this._readTemplate(16),this.reserved1=this._readUint(16),this.reserved2=[this._readUint(32),this._readUint(32)],this.matrix=[];for(var a=0;9>a;a++)this.matrix.push(this._readTemplate(32));this.pre_defined=[];for(var a=0;6>a;a++)this.pre_defined.push(this._readUint(32));this.next_track_ID=this._readUint(32)},ISOBox.prototype._boxParsers.sidx=function(){this._parseFullBox(),this.reference_ID=this._readUint(32),this.timescale=this._readUint(32),0==this.version?(this.earliest_presentation_time=this._readUint(32),this.first_offset=this._readUint(32)):(this.earliest_presentation_time=this._readUint(64),this.first_offset=this._readUint(64)),this.reserved=this._readUint(16),this.reference_count=this._readUint(16),this.references=[];for(var a=0;a<this.reference_count;a++){var b={},c=this._readUint(32);b.reference_type=c>>31&1,b.referenced_size=2147483647&c,b.subsegment_duration=this._readUint(32);var d=this._readUint(32);b.starts_with_SAP=d>>31&1,b.SAP_type=d>>28&7,b.SAP_delta_time=268435455&d,this.references.push(b)}},ISOBox.prototype._boxParsers.ssix=function(){this._parseFullBox(),this.subsegment_count=this._readUint(32),this.subsegments=[];for(var a=0;a<this.subsegment_count;a++){var b={};b.ranges_count=this._readUint(32),b.ranges=[];for(var c=0;c<b.ranges_count;c++){var d={};d.level=this._readUint(8),d.range_size=this._readUint(24),b.ranges.push(d)}this.subsegments.push(b)}},ISOBox.prototype._boxParsers.tfdt=function(){this._parseFullBox(),this.baseMediaDecodeTime=this._readUint(1==this.version?64:32)},ISOBox.prototype._boxParsers.tfhd=function(){this._parseFullBox(),this.track_ID=this._readUint(32),1&this.flags&&(this.base_data_offset=this._readUint(64)),2&this.flags&&(this.sample_description_offset=this._readUint(32)),8&this.flags&&(this.default_sample_duration=this._readUint(32)),16&this.flags&&(this.default_sample_size=this._readUint(32)),32&this.flags&&(this.default_sample_flags=this._readUint(32))},ISOBox.prototype._boxParsers.tkhd=function(){this._parseFullBox(),1==this.version?(this.creation_time=this._readUint(64),this.modification_time=this._readUint(64),this.track_ID=this._readUint(32),this.reserved1=this._readUint(32),this.duration=this._readUint(64)):(this.creation_time=this._readUint(32),this.modification_time=this._readUint(32),this.track_ID=this._readUint(32),this.reserved1=this._readUint(32),this.duration=this._readUint(32)),this.reserved2=[this._readUint(32),this._readUint(32)],this.layer=this._readUint(16),this.alternate_group=this._readUint(16),this.volume=this._readTemplate(16),this.reserved3=this._readUint(16),this.matrix=[];for(var a=0;9>a;a++)this.matrix.push(this._readTemplate(32));this.width=this._readUint(32),this.height=this._readUint(32)},ISOBox.prototype._boxParsers.trun=function(){this._parseFullBox(),this.sample_count=this._readUint(32),1&this.flags&&(this.data_offset=this._readInt(32)),4&this.flags&&(this.first_sample_flags=this._readUint(32)),this.samples=[];for(var a=0;a<this.sample_count;a++){var b={};256&this.flags&&(b.sample_duration=this._readUint(32)),512&this.flags&&(b.sample_size=this._readUint(32)),1024&this.flags&&(b.sample_flags=this._readUint(32)),2048&this.flags&&(b.sample_composition_time_offset=0==this.version?this._readUint(32):this._readInt(32)),this.samples.push(b)}};
+/*! codem-isoboxer v0.2.2 https://github.com/madebyhiro/codem-isoboxer/blob/master/LICENSE.txt */
+var ISOBoxer={};ISOBoxer.parseBuffer=function(a){return new ISOFile(a).parse()},ISOBoxer.Utils={},ISOBoxer.Utils.dataViewToString=function(a,b){var c=b||"utf-8";if("undefined"!=typeof TextDecoder)return new TextDecoder(c).decode(a);var d=[],e=0;if("utf-8"===c)for(;e<a.byteLength;){var f=a.getUint8(e++);128>f||(224>f?(f=(31&f)<<6,f|=63&a.getUint8(e++)):240>f?(f=(15&f)<<12,f|=(63&a.getUint8(e++))<<6,f|=63&a.getUint8(e++)):(f=(7&f)<<18,f|=(63&a.getUint8(e++))<<12,f|=(63&a.getUint8(e++))<<6,f|=63&a.getUint8(e++))),d.push(String.fromCharCode(f))}else for(;e<a.byteLength;)d.push(String.fromCharCode(a.getUint8(e++)));return d.join("")},"undefined"!=typeof exports&&(exports.parseBuffer=ISOBoxer.parseBuffer,exports.Utils=ISOBoxer.Utils),ISOBoxer.Cursor=function(a){this.offset="undefined"==typeof a?0:a};var ISOFile=function(a){this._raw=new DataView(a),this._cursor=new ISOBoxer.Cursor,this.boxes=[]};ISOFile.prototype.fetch=function(a){var b=this.fetchAll(a,!0);return b.length?b[0]:null},ISOFile.prototype.fetchAll=function(a,b){var c=[];return ISOFile._sweep.call(this,a,c,b),c},ISOFile.prototype.parse=function(){for(this._cursor.offset=0,this.boxes=[];this._cursor.offset<this._raw.byteLength;){var a=ISOBox.parse(this);if("undefined"==typeof a.type)break;this.boxes.push(a)}return this},ISOFile._sweep=function(a,b,c){this.type&&this.type==a&&b.push(this);for(var d in this.boxes){if(b.length&&c)return;ISOFile._sweep.call(this.boxes[d],a,b,c)}};var ISOBox=function(){this._cursor=new ISOBoxer.Cursor};ISOBox.parse=function(a){var b=new ISOBox;return b._offset=a._cursor.offset,b._root=a._root?a._root:a,b._raw=a._raw,b._parent=a,b._parseBox(),a._cursor.offset=b._raw.byteOffset+b._raw.byteLength,b},ISOBox.prototype._readInt=function(a){var b=null;switch(a){case 8:b=this._raw.getInt8(this._cursor.offset-this._raw.byteOffset);break;case 16:b=this._raw.getInt16(this._cursor.offset-this._raw.byteOffset);break;case 32:b=this._raw.getInt32(this._cursor.offset-this._raw.byteOffset);break;case 64:var c=this._raw.getInt32(this._cursor.offset-this._raw.byteOffset),d=this._raw.getInt32(this._cursor.offset-this._raw.byteOffset+4);b=c*Math.pow(2,32)+d}return this._cursor.offset+=a>>3,b},ISOBox.prototype._readUint=function(a){var b=null;switch(a){case 8:b=this._raw.getUint8(this._cursor.offset-this._raw.byteOffset);break;case 16:b=this._raw.getUint16(this._cursor.offset-this._raw.byteOffset);break;case 24:var c=this._raw.getUint16(this._cursor.offset-this._raw.byteOffset),d=this._raw.getUint8(this._cursor.offset-this._raw.byteOffset+2);b=(c<<8)+d;break;case 32:b=this._raw.getUint32(this._cursor.offset-this._raw.byteOffset);break;case 64:var c=this._raw.getUint32(this._cursor.offset-this._raw.byteOffset),d=this._raw.getUint32(this._cursor.offset-this._raw.byteOffset+4);b=c*Math.pow(2,32)+d}return this._cursor.offset+=a>>3,b},ISOBox.prototype._readString=function(a){for(var b="",c=0;a>c;c++){var d=this._readUint(8);b+=String.fromCharCode(d)}return b},ISOBox.prototype._readTerminatedString=function(){for(var a="";;){var b=this._readUint(8);if(0==b)break;a+=String.fromCharCode(b)}return a},ISOBox.prototype._readTemplate=function(a){var b=this._readUint(a/2),c=this._readUint(a/2);return b+c/Math.pow(2,a/2)},ISOBox.prototype._parseBox=function(){if(this._cursor.offset=this._offset,this._offset+8>this._raw.buffer.byteLength)return void(this._root._incomplete=!0);switch(this.size=this._readUint(32),this.type=this._readString(4),1==this.size&&(this.largesize=this._readUint(64)),"uuid"==this.type&&(this.usertype=this._readString(16)),this.size){case 0:this._raw=new DataView(this._raw.buffer,this._offset,this._raw.byteLength-this._cursor.offset);break;case 1:this._offset+this.size>this._raw.buffer.byteLength?(this._incomplete=!0,this._root._incomplete=!0):this._raw=new DataView(this._raw.buffer,this._offset,this.largesize);break;default:this._offset+this.size>this._raw.buffer.byteLength?(this._incomplete=!0,this._root._incomplete=!0):this._raw=new DataView(this._raw.buffer,this._offset,this.size)}!this._incomplete&&this._boxParsers[this.type]&&this._boxParsers[this.type].call(this)},ISOBox.prototype._parseFullBox=function(){this.version=this._readUint(8),this.flags=this._readUint(24)},ISOBox.prototype._boxParsers={},["moov","trak","tref","mdia","minf","stbl","edts","dinf","mvex","moof","traf","mfra","udta","meco","strk","vttc"].forEach(function(a){ISOBox.prototype._boxParsers[a]=function(){for(this.boxes=[];this._cursor.offset-this._raw.byteOffset<this._raw.byteLength;)this.boxes.push(ISOBox.parse(this))}}),ISOBox.prototype._boxParsers.elst=function(){this._parseFullBox(),this.entry_count=this._readUint(32),this.entries=[];for(var a=1;a<=this.entry_count;a++){var b={};1==this.version?(b.segment_duration=this._readUint(64),b.media_time=this._readInt(64)):(b.segment_duration=this._readUint(32),b.media_time=this._readInt(32)),b.media_rate_integer=this._readInt(16),b.media_rate_fraction=this._readInt(16),this.entries.push(b)}},ISOBox.prototype._boxParsers.emsg=function(){this._parseFullBox(),this.scheme_id_uri=this._readTerminatedString(),this.value=this._readTerminatedString(),this.timescale=this._readUint(32),this.presentation_time_delta=this._readUint(32),this.event_duration=this._readUint(32),this.id=this._readUint(32),this.message_data=new DataView(this._raw.buffer,this._cursor.offset,this._raw.byteLength-(this._cursor.offset-this._offset))},ISOBox.prototype._boxParsers.free=ISOBox.prototype._boxParsers.skip=function(){this.data=new DataView(this._raw.buffer,this._cursor.offset,this._raw.byteLength-(this._cursor.offset-this._offset))},ISOBox.prototype._boxParsers.ftyp=ISOBox.prototype._boxParsers.styp=function(){for(this.major_brand=this._readString(4),this.minor_versions=this._readUint(32),this.compatible_brands=[];this._cursor.offset-this._raw.byteOffset<this._raw.byteLength;)this.compatible_brands.push(this._readString(4))},ISOBox.prototype._boxParsers.hdlr=function(){this._parseFullBox(),this.pre_defined=this._readUint(32),this.handler_type=this._readString(4),this.reserved=[this._readUint(32),this._readUint(32),this._readUint(32)],this.name=this._readTerminatedString()},ISOBox.prototype._boxParsers.mdat=function(){this.data=new DataView(this._raw.buffer,this._cursor.offset,this._raw.byteLength-(this._cursor.offset-this._offset))},ISOBox.prototype._boxParsers.mdhd=function(){this._parseFullBox(),1==this.version?(this.creation_time=this._readUint(64),this.modification_time=this._readUint(64),this.timescale=this._readUint(32),this.duration=this._readUint(64)):(this.creation_time=this._readUint(32),this.modification_time=this._readUint(32),this.timescale=this._readUint(32),this.duration=this._readUint(32));var a=this._readUint(16);this.pad=a>>15,this.language=String.fromCharCode((a>>10&31)+96,(a>>5&31)+96,(31&a)+96),this.pre_defined=this._readUint(16)},ISOBox.prototype._boxParsers.mfhd=function(){this._parseFullBox(),this.sequence_number=this._readUint(32)},ISOBox.prototype._boxParsers.mvhd=function(){this._parseFullBox(),1==this.version?(this.creation_time=this._readUint(64),this.modification_time=this._readUint(64),this.timescale=this._readUint(32),this.duration=this._readUint(64)):(this.creation_time=this._readUint(32),this.modification_time=this._readUint(32),this.timescale=this._readUint(32),this.duration=this._readUint(32)),this.rate=this._readTemplate(32),this.volume=this._readTemplate(16),this.reserved1=this._readUint(16),this.reserved2=[this._readUint(32),this._readUint(32)],this.matrix=[];for(var a=0;9>a;a++)this.matrix.push(this._readTemplate(32));this.pre_defined=[];for(var a=0;6>a;a++)this.pre_defined.push(this._readUint(32));this.next_track_ID=this._readUint(32)},ISOBox.prototype._boxParsers.payl=function(){var a=new DataView(this._raw.buffer,this._cursor.offset,this._raw.byteLength-(this._cursor.offset-this._offset));this.cue_text=ISOBoxer.Utils.dataViewToString(a)},ISOBox.prototype._boxParsers.sidx=function(){this._parseFullBox(),this.reference_ID=this._readUint(32),this.timescale=this._readUint(32),0==this.version?(this.earliest_presentation_time=this._readUint(32),this.first_offset=this._readUint(32)):(this.earliest_presentation_time=this._readUint(64),this.first_offset=this._readUint(64)),this.reserved=this._readUint(16),this.reference_count=this._readUint(16),this.references=[];for(var a=0;a<this.reference_count;a++){var b={},c=this._readUint(32);b.reference_type=c>>31&1,b.referenced_size=2147483647&c,b.subsegment_duration=this._readUint(32);var d=this._readUint(32);b.starts_with_SAP=d>>31&1,b.SAP_type=d>>28&7,b.SAP_delta_time=268435455&d,this.references.push(b)}},ISOBox.prototype._boxParsers.ssix=function(){this._parseFullBox(),this.subsegment_count=this._readUint(32),this.subsegments=[];for(var a=0;a<this.subsegment_count;a++){var b={};b.ranges_count=this._readUint(32),b.ranges=[];for(var c=0;c<b.ranges_count;c++){var d={};d.level=this._readUint(8),d.range_size=this._readUint(24),b.ranges.push(d)}this.subsegments.push(b)}},ISOBox.prototype._boxParsers.tfdt=function(){this._parseFullBox(),this.baseMediaDecodeTime=this._readUint(1==this.version?64:32)},ISOBox.prototype._boxParsers.tfhd=function(){this._parseFullBox(),this.track_ID=this._readUint(32),1&this.flags&&(this.base_data_offset=this._readUint(64)),2&this.flags&&(this.sample_description_offset=this._readUint(32)),8&this.flags&&(this.default_sample_duration=this._readUint(32)),16&this.flags&&(this.default_sample_size=this._readUint(32)),32&this.flags&&(this.default_sample_flags=this._readUint(32))},ISOBox.prototype._boxParsers.tkhd=function(){this._parseFullBox(),1==this.version?(this.creation_time=this._readUint(64),this.modification_time=this._readUint(64),this.track_ID=this._readUint(32),this.reserved1=this._readUint(32),this.duration=this._readUint(64)):(this.creation_time=this._readUint(32),this.modification_time=this._readUint(32),this.track_ID=this._readUint(32),this.reserved1=this._readUint(32),this.duration=this._readUint(32)),this.reserved2=[this._readUint(32),this._readUint(32)],this.layer=this._readUint(16),this.alternate_group=this._readUint(16),this.volume=this._readTemplate(16),this.reserved3=this._readUint(16),this.matrix=[];for(var a=0;9>a;a++)this.matrix.push(this._readTemplate(32));this.width=this._readUint(32),this.height=this._readUint(32)},ISOBox.prototype._boxParsers.trun=function(){this._parseFullBox(),this.sample_count=this._readUint(32),1&this.flags&&(this.data_offset=this._readInt(32)),4&this.flags&&(this.first_sample_flags=this._readUint(32)),this.samples=[];for(var a=0;a<this.sample_count;a++){var b={};256&this.flags&&(b.sample_duration=this._readUint(32)),512&this.flags&&(b.sample_size=this._readUint(32)),1024&this.flags&&(b.sample_flags=this._readUint(32)),2048&this.flags&&(b.sample_composition_time_offset=0==this.version?this._readUint(32):this._readInt(32)),this.samples.push(b)}},ISOBox.prototype._boxParsers.vlab=function(){var a=new DataView(this._raw.buffer,this._cursor.offset,this._raw.byteLength-(this._cursor.offset-this._offset));this.source_label=ISOBoxer.Utils.dataViewToString(a)},ISOBox.prototype._boxParsers.vttC=function(){var a=new DataView(this._raw.buffer,this._cursor.offset,this._raw.byteLength-(this._cursor.offset-this._offset));this.config=ISOBoxer.Utils.dataViewToString(a)},ISOBox.prototype._boxParsers.vtte=function(){};

package.json

 {
   "name": "codem-isoboxer",
-  "version": "0.2.1",
+  "version": "0.2.2",
   "description": "Browser-based MPEG-4 (ISOBMFF) file/box parsing.",
@@ -5,0 +5,0 @@ "keywords": [

README.md

@@ -19,2 +19,3 @@ # codem-isoboxer
 * edts
+* elst
 * free / skip
@@ -47,2 +48,10 @@ * ftyp / styp
 
+### ISO/IEC 14496-30:2014 (Timed text and other visual overlays in ISOBMFF)
+
+* vttC
+* vttc
+* vtte
+* vlab
+* payl
+
 Support for more boxes can easily be added by adding additional box parsers in `src/parsers`. Some utility functions are included to help with reading the various ISOBMFF data types from the raw file. Also, see the [Box Support page on the Wiki](https://github.com/madebyhiro/codem-isoboxer/wiki/Box-support) for a full list.
@@ -49,0 +58,0 @@

src/iso_boxer.js

@@ -9,10 +9,42 @@ var ISOBoxer = {};
 ISOBoxer.Utils.dataViewToString = function(dataView, encoding) {
+  var impliedEncoding = encoding || 'utf-8'
   if (typeof TextDecoder !== 'undefined') {
-    return new TextDecoder(encoding || 'utf-8').decode(dataView);
+    return new TextDecoder(impliedEncoding).decode(dataView);
   }
-  var str = '';
-  for (var i=0; i<dataView.byteLength; i++) {
-    str += String.fromCharCode(dataView.getUint8(i));
-  }    
-  return str;  
+  var a = [];
+  var i = 0;
+  
+  if (impliedEncoding === 'utf-8') {
+    /* The following algorithm is essentially a rewrite of the UTF8.decode at 
+    http://bannister.us/weblog/2007/simple-base64-encodedecode-javascript/
+    */
+  
+    while (i < dataView.byteLength) {
+      var c = dataView.getUint8(i++);
+      if (c < 0x80) {
+        // 1-byte character (7 bits)
+      } else if (c < 0xe0) {
+        // 2-byte character (11 bits)
+        c = (c & 0x1f) << 6;
+        c |= (dataView.getUint8(i++) & 0x3f);
+      } else if (c < 0xf0) {
+        // 3-byte character (16 bits)
+        c = (c & 0xf) << 12;
+        c |= (dataView.getUint8(i++) & 0x3f) << 6;
+        c |= (dataView.getUint8(i++) & 0x3f);
+      } else {
+        // 4-byte character (21 bits)
+        c = (c & 0x7) << 18;
+        c |= (dataView.getUint8(i++) & 0x3f) << 12;
+        c |= (dataView.getUint8(i++) & 0x3f) << 6;
+        c |= (dataView.getUint8(i++) & 0x3f);
+      }
+      a.push(String.fromCharCode(c));
+    }
+  } else { // Just map byte-by-byte (probably wrong)
+    while (i < dataView.byteLength) {
+      a.push(String.fromCharCode(dataView.getUint8(i++)));
+    }
+  }
+  return a.join('');  
 };
@@ -19,0 +51,0 @@

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Fixed alerts

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Improved metrics

Total package byte prevSize

59665

increased by10.38%

Number of package files

32

increased by14.29%

Lines of code

993

increased by11.7%

Number of lines in readme file

169

increased by5.63%

No dependency changes