scrolly-video/dist/scrolly-video.js

A component for scroll-based (or other externally controlled) playback.

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t&&/,/.test(t)&&(s=t.split(","),t=s[0],n=parseInt(s[1])),t){case"uint8":this.writeUint8(e);break;case"int8":this.writeInt8(e);break;case"uint16":this.writeUint16(e,this.endianness);break;case"int16":this.writeInt16(e,this.endianness);break;case"uint32":this.writeUint32(e,this.endianness);break;case"int32":this.writeInt32(e,this.endianness);break;case"float32":this.writeFloat32(e,this.endianness);break;case"float64":this.writeFloat64(e,this.endianness);break;case"uint16be":this.writeUint16(e,a.BIG_ENDIAN);break;case"int16be":this.writeInt16(e,a.BIG_ENDIAN);break;case"uint32be":this.writeUint32(e,a.BIG_ENDIAN);break;case"int32be":this.writeInt32(e,a.BIG_ENDIAN);break;case"float32be":this.writeFloat32(e,a.BIG_ENDIAN);break;case"float64be":this.writeFloat64(e,a.BIG_ENDIAN);break;case"uint16le":this.writeUint16(e,a.LITTLE_ENDIAN);break;case"int16le":this.writeInt16(e,a.LITTLE_ENDIAN);break;case"uint32le":this.writeUint32(e,a.LITTLE_ENDIAN);break;case"int32le":this.writeInt32(e,a.LITTLE_ENDIAN);break;case"float32le":this.writeFloat32(e,a.LITTLE_ENDIAN);break;case"float64le":this.writeFloat64(e,a.LITTLE_ENDIAN);break;case"cstring":this.writeCString(e,r);break;case"string":this.writeString(e,n,r);break;case"u16string":this.writeUCS2String(e,this.endianness,r);break;case"u16stringle":this.writeUCS2String(e,a.LITTLE_ENDIAN,r);break;case"u16stringbe":this.writeUCS2String(e,a.BIG_ENDIAN,r);break;default:if(3==t.length){for(var h=t[1],d=0;d<e.length;d++)this.writeType(h,e[d]);break}this.writeStruct(t,e)}null!=r&&(this.position=o,this._realloc(r),this.position=o+r)},a.prototype.writeUint64=function(t){var e=Math.floor(t/o);this.writeUint32(e),this.writeUint32(4294967295&t)},a.prototype.writeUint24=function(t){this.writeUint8((16711680&t)>>16),this.writeUint8((65280&t)>>8),this.writeUint8(255&t)},a.prototype.adjustUint32=function(t,e){var i=this.position;this.seek(t),this.writeUint32(e),this.seek(i)},a.prototype.mapInt32Array=function(t,e){this._realloc(4*t);var i=new Int32Array(this._buffer,this.byteOffset+this.position,t);return a.arrayToNative(i,null==e?this.endianness:e),this.position+=4*t,i},a.prototype.mapInt16Array=function(t,e){this._realloc(2*t);var i=new Int16Array(this._buffer,this.byteOffset+this.position,t);return a.arrayToNative(i,null==e?this.endianness:e),this.position+=2*t,i},a.prototype.mapInt8Array=function(t){this._realloc(1*t);var e=new Int8Array(this._buffer,this.byteOffset+this.position,t);return this.position+=1*t,e},a.prototype.mapUint32Array=function(t,e){this._realloc(4*t);var i=new Uint32Array(this._buffer,this.byteOffset+this.position,t);return a.arrayToNative(i,null==e?this.endianness:e),this.position+=4*t,i},a.prototype.mapUint16Array=function(t,e){this._realloc(2*t);var i=new Uint16Array(this._buffer,this.byteOffset+this.position,t);return a.arrayToNative(i,null==e?this.endianness:e),this.position+=2*t,i},a.prototype.mapFloat64Array=function(t,e){this._realloc(8*t);var i=new Float64Array(this._buffer,this.byteOffset+this.position,t);return a.arrayToNative(i,null==e?this.endianness:e),this.position+=8*t,i},a.prototype.mapFloat32Array=function(t,e){this._realloc(4*t);var i=new Float32Array(this._buffer,this.byteOffset+this.position,t);return a.arrayToNative(i,null==e?this.endianness:e),this.position+=4*t,i};var h=function(t){this.buffers=[],this.bufferIndex=-1,t&&(this.insertBuffer(t),this.bufferIndex=0)};(h.prototype=new a(new ArrayBuffer,0,a.BIG_ENDIAN)).initialized=function(){var t;return this.bufferIndex>-1||(this.buffers.length>0?0===(t=this.buffers[0]).fileStart?(this.buffer=t,this.bufferIndex=0,r.debug("MultiBufferStream","Stream ready for parsing"),!0):(r.warn("MultiBufferStream","The first buffer should have a fileStart of 0"),this.logBufferLevel(),!1):(r.warn("MultiBufferStream","No buffer to start parsing from"),this.logBufferLevel(),!1))},ArrayBuffer.concat=function(t,e){r.debug("ArrayBuffer","Trying to create a new buffer of size: "+(t.byteLength+e.byteLength));var i=new Uint8Array(t.byteLength+e.byteLength);return i.set(new Uint8Array(t),0),i.set(new Uint8Array(e),t.byteLength),i.buffer},h.prototype.reduceBuffer=function(t,e,i){var s;return(s=new Uint8Array(i)).set(new Uint8Array(t,e,i)),s.buffer.fileStart=t.fileStart+e,s.buffer.usedBytes=0,s.buffer},h.prototype.insertBuffer=function(t){for(var e=!0,i=0;i<this.buffers.length;i++){var s=this.buffers[i];if(t.fileStart<=s.fileStart){if(t.fileStart===s.fileStart){if(t.byteLength>s.byteLength){this.buffers.splice(i,1),i--;continue}r.warn("MultiBufferStream","Buffer (fileStart: "+t.fileStart+" - Length: "+t.byteLength+") already appended, ignoring")}else t.fileStart+t.byteLength<=s.fileStart||(t=this.reduceBuffer(t,0,s.fileStart-t.fileStart)),r.debug("MultiBufferStream","Appending new buffer (fileStart: "+t.fileStart+" - Length: "+t.byteLength+")"),this.buffers.splice(i,0,t),0===i&&(this.buffer=t);e=!1;break}if(t.fileStart<s.fileStart+s.byteLength){var n=s.fileStart+s.byteLength-t.fileStart,a=t.byteLength-n;if(!(a>0)){e=!1;break}t=this.reduceBuffer(t,n,a)}}e&&(r.debug("MultiBufferStream","Appending new buffer (fileStart: "+t.fileStart+" - Length: "+t.byteLength+")"),this.buffers.push(t),0===i&&(this.buffer=t))},h.prototype.logBufferLevel=function(t){var e,i,s,n,a,o=[],h="";for(s=0,n=0,e=0;e<this.buffers.length;e++)i=this.buffers[e],0===e?(a={},o.push(a),a.start=i.fileStart,a.end=i.fileStart+i.byteLength,h+="["+a.start+"-"):a.end===i.fileStart?a.end=i.fileStart+i.byteLength:((a={}).start=i.fileStart,h+=o[o.length-1].end-1+"], ["+a.start+"-",a.end=i.fileStart+i.byteLength,o.push(a)),s+=i.usedBytes,n+=i.byteLength;o.length>0&&(h+=a.end-1+"]");var d=t?r.info:r.debug;0===this.buffers.length?d("MultiBufferStream","No more buffer in memory"):d("MultiBufferStream",this.buffers.length+" stored buffer(s) ("+s+"/"+n+" bytes), continuous ranges: "+h)},h.prototype.cleanBuffers=function(){var t,e;for(t=0;t<this.buffers.length;t++)(e=this.buffers[t]).usedBytes===e.byteLength&&(r.debug("MultiBufferStream","Removing buffer #"+t),this.buffers.splice(t,1),t--)},h.prototype.mergeNextBuffer=function(){var t;if(this.bufferIndex+1<this.buffers.length){if((t=this.buffers[this.bufferIndex+1]).fileStart===this.buffer.fileStart+this.buffer.byteLength){var e=this.buffer.byteLength,i=this.buffer.usedBytes,s=this.buffer.fileStart;return this.buffers[this.bufferIndex]=ArrayBuffer.concat(this.buffer,t),this.buffer=this.buffers[this.bufferIndex],this.buffers.splice(this.bufferIndex+1,1),this.buffer.usedBytes=i,this.buffer.fileStart=s,r.debug("ISOFile","Concatenating buffer for box parsing (length: "+e+"->"+this.buffer.byteLength+")"),!0}return!1}return!1},h.prototype.findPosition=function(t,e,i){var s,n=null,a=-1;for(s=!0===t?0:this.bufferIndex;s<this.buffers.length&&(n=this.buffers[s]).fileStart<=e;)a=s,i&&(n.fileStart+n.byteLength<=e?n.usedBytes=n.byteLength:n.usedBytes=e-n.fileStart,this.logBufferLevel()),s++;return-1!==a&&(n=this.buffers[a]).fileStart+n.byteLength>=e?(r.debug("MultiBufferStream","Found position in existing buffer #"+a),a):-1},h.prototype.findEndContiguousBuf=function(t){var e,i,s,r=void 0!==t?t:this.bufferIndex;if(i=this.buffers[r],this.buffers.length>r+1)for(e=r+1;e<this.buffers.length&&(s=this.buffers[e]).fileStart===i.fileStart+i.byteLength;e++)i=s;return i.fileStart+i.byteLength},h.prototype.getEndFilePositionAfter=function(t){var e=this.findPosition(!0,t,!1);return-1!==e?this.findEndContiguousBuf(e):t},h.prototype.addUsedBytes=function(t){this.buffer.usedBytes+=t,this.logBufferLevel()},h.prototype.setAllUsedBytes=function(){this.buffer.usedBytes=this.buffer.byteLength,this.logBufferLevel()},h.prototype.seek=function(t,e,i){var s;return-1!==(s=this.findPosition(e,t,i))?(this.buffer=this.buffers[s],this.bufferIndex=s,this.position=t-this.buffer.fileStart,r.debug("MultiBufferStream","Repositioning parser at buffer position: "+this.position),!0):(r.debug("MultiBufferStream","Position "+t+" not found in buffered data"),!1)},h.prototype.getPosition=function(){if(-1===this.bufferIndex||null===this.buffers[this.bufferIndex])throw"Error accessing position in the MultiBufferStream";return this.buffers[this.bufferIndex].fileStart+this.position},h.prototype.getLength=function(){return this.byteLength},h.prototype.getEndPosition=function(){if(-1===this.bufferIndex||null===this.buffers[this.bufferIndex])throw"Error accessing position in the MultiBufferStream";return this.buffers[this.bufferIndex].fileStart+this.byteLength},t.MultiBufferStream=h;var d=function(){var t=[];t[3]="ES_Descriptor",t[4]="DecoderConfigDescriptor",t[5]="DecoderSpecificInfo",t[6]="SLConfigDescriptor",this.getDescriptorName=function(e){return t[e]};var e=this,i={};return this.parseOneDescriptor=function(e){var s,n,a,o=0;for(s=e.readUint8(),a=e.readUint8();128&a;)o=(127&a)<<7,a=e.readUint8();return o+=127&a,r.debug("MPEG4DescriptorParser","Found "+(t[s]||"Descriptor "+s)+", size "+o+" at position "+e.getPosition()),(n=t[s]?new i[t[s]](o):new i.Descriptor(o)).parse(e),n},i.Descriptor=function(t,e){this.tag=t,this.size=e,this.descs=[]},i.Descriptor.prototype.parse=function(t){this.data=t.readUint8Array(this.size)},i.Descriptor.prototype.findDescriptor=function(t){for(var e=0;e<this.descs.length;e++)if(this.descs[e].tag==t)return this.descs[e];return null},i.Descriptor.prototype.parseRemainingDescriptors=function(t){for(var i=t.position;t.position<i+this.size;){var s=e.parseOneDescriptor(t);this.descs.push(s)}},i.ES_Descriptor=function(t){i.Descriptor.call(this,3,t)},i.ES_Descriptor.prototype=new i.Descriptor,i.ES_Descriptor.prototype.parse=function(t){if(this.ES_ID=t.readUint16(),this.flags=t.readUint8(),this.size-=3,128&this.flags?(this.dependsOn_ES_ID=t.readUint16(),this.size-=2):this.dependsOn_ES_ID=0,64&this.flags){var e=t.readUint8();this.URL=t.readString(e),this.size-=e+1}else this.URL="";32&this.flags?(this.OCR_ES_ID=t.readUint16(),this.size-=2):this.OCR_ES_ID=0,this.parseRemainingDescriptors(t)},i.ES_Descriptor.prototype.getOTI=function(t){var e=this.findDescriptor(4);return e?e.oti:0},i.ES_Descriptor.prototype.getAudioConfig=function(t){var e=this.findDescriptor(4);if(!e)return null;var i=e.findDescriptor(5);if(i&&i.data){var s=(248&i.data[0])>>3;return 31===s&&i.data.length>=2&&(s=32+((7&i.data[0])<<3)+((224&i.data[1])>>5)),s}return null},i.DecoderConfigDescriptor=function(t){i.Descriptor.call(this,4,t)},i.DecoderConfigDescriptor.prototype=new i.Descriptor,i.DecoderConfigDescriptor.prototype.parse=function(t){this.oti=t.readUint8(),this.streamType=t.readUint8(),this.bufferSize=t.readUint24(),this.maxBitrate=t.readUint32(),this.avgBitrate=t.readUint32(),this.size-=13,this.parseRemainingDescriptors(t)},i.DecoderSpecificInfo=function(t){i.Descriptor.call(this,5,t)},i.DecoderSpecificInfo.prototype=new i.Descriptor,i.SLConfigDescriptor=function(t){i.Descriptor.call(this,6,t)},i.SLConfigDescriptor.prototype=new i.Descriptor,this};t.MPEG4DescriptorParser=d;var l={ERR_INVALID_DATA:-1,ERR_NOT_ENOUGH_DATA:0,OK:1,BASIC_BOXES:["mdat","idat","free","skip","meco","strk"],FULL_BOXES:["hmhd","nmhd","iods","xml ","bxml","ipro","mere"],CONTAINER_BOXES:[["moov",["trak","pssh"]],["trak"],["edts"],["mdia"],["minf"],["dinf"],["stbl",["sgpd","sbgp"]],["mvex",["trex"]],["moof",["traf"]],["traf",["trun","sgpd","sbgp"]],["vttc"],["tref"],["iref"],["mfra",["tfra"]],["meco"],["hnti"],["hinf"],["strk"],["strd"],["sinf"],["rinf"],["schi"],["trgr"],["udta",["kind"]],["iprp",["ipma"]],["ipco"]],boxCodes:[],fullBoxCodes:[],containerBoxCodes:[],sampleEntryCodes:{},sampleGroupEntryCodes:[],trackGroupTypes:[],UUIDBoxes:{},UUIDs:[],initialize:function(){l.FullBox.prototype=new l.Box,l.ContainerBox.prototype=new l.Box,l.SampleEntry.prototype=new l.Box,l.TrackGroupTypeBox.prototype=new l.FullBox,l.BASIC_BOXES.forEach((function(t){l.createBoxCtor(t)})),l.FULL_BOXES.forEach((function(t){l.createFullBoxCtor(t)})),l.CONTAINER_BOXES.forEach((function(t){l.createContainerBoxCtor(t[0],null,t[1])}))},Box:function(t,e,i){this.type=t,this.size=e,this.uuid=i},FullBox:function(t,e,i){l.Box.call(this,t,e,i),this.flags=0,this.version=0},ContainerBox:function(t,e,i){l.Box.call(this,t,e,i),this.boxes=[]},SampleEntry:function(t,e,i,s){l.ContainerBox.call(this,t,e),this.hdr_size=i,this.start=s},SampleGroupEntry:function(t){this.grouping_type=t},TrackGroupTypeBox:function(t,e){l.FullBox.call(this,t,e)},createBoxCtor:function(t,e){l.boxCodes.push(t),l[t+"Box"]=function(e){l.Box.call(this,t,e)},l[t+"Box"].prototype=new l.Box,e&&(l[t+"Box"].prototype.parse=e)},createFullBoxCtor:function(t,e){l[t+"Box"]=function(e){l.FullBox.call(this,t,e)},l[t+"Box"].prototype=new l.FullBox,l[t+"Box"].prototype.parse=function(t){this.parseFullHeader(t),e&&e.call(this,t)}},addSubBoxArrays:function(t){if(t){this.subBoxNames=t;for(var e=t.length,i=0;i<e;i++)this[t[i]+"s"]=[]}},createContainerBoxCtor:function(t,e,i){l[t+"Box"]=function(e){l.ContainerBox.call(this,t,e),l.addSubBoxArrays.call(this,i)},l[t+"Box"].prototype=new l.ContainerBox,e&&(l[t+"Box"].prototype.parse=e)},createMediaSampleEntryCtor:function(t,e,i){l.sampleEntryCodes[t]=[],l[t+"SampleEntry"]=function(t,e){l.SampleEntry.call(this,t,e),l.addSubBoxArrays.call(this,i)},l[t+"SampleEntry"].prototype=new l.SampleEntry,e&&(l[t+"SampleEntry"].prototype.parse=e)},createSampleEntryCtor:function(t,e,i,s){l.sampleEntryCodes[t].push(e),l[e+"SampleEntry"]=function(i){l[t+"SampleEntry"].call(this,e,i),l.addSubBoxArrays.call(this,s)},l[e+"SampleEntry"].prototype=new l[t+"SampleEntry"],i&&(l[e+"SampleEntry"].prototype.parse=i)},createEncryptedSampleEntryCtor:function(t,e,i){l.createSampleEntryCtor.call(this,t,e,i,["sinf"])},createSampleGroupCtor:function(t,e){l[t+"SampleGroupEntry"]=function(e){l.SampleGroupEntry.call(this,t,e)},l[t+"SampleGroupEntry"].prototype=new l.SampleGroupEntry,e&&(l[t+"SampleGroupEntry"].prototype.parse=e)},createTrackGroupCtor:function(t,e){l[t+"TrackGroupTypeBox"]=function(e){l.TrackGroupTypeBox.call(this,t,e)},l[t+"TrackGroupTypeBox"].prototype=new l.TrackGroupTypeBox,e&&(l[t+"TrackGroupTypeBox"].prototype.parse=e)},createUUIDBox:function(t,e,i,s){l.UUIDs.push(t),l.UUIDBoxes[t]=function(s){e?l.FullBox.call(this,"uuid",s,t):i?l.ContainerBox.call(this,"uuid",s,t):l.Box.call(this,"uuid",s,t)},l.UUIDBoxes[t].prototype=e?new l.FullBox:i?new l.ContainerBox:new l.Box,s&&(l.UUIDBoxes[t].prototype.parse=e?function(t){this.parseFullHeader(t),s&&s.call(this,t)}:s)}};l.initialize(),l.TKHD_FLAG_ENABLED=1,l.TKHD_FLAG_IN_MOVIE=2,l.TKHD_FLAG_IN_PREVIEW=4,l.TFHD_FLAG_BASE_DATA_OFFSET=1,l.TFHD_FLAG_SAMPLE_DESC=2,l.TFHD_FLAG_SAMPLE_DUR=8,l.TFHD_FLAG_SAMPLE_SIZE=16,l.TFHD_FLAG_SAMPLE_FLAGS=32,l.TFHD_FLAG_DUR_EMPTY=65536,l.TFHD_FLAG_DEFAULT_BASE_IS_MOOF=131072,l.TRUN_FLAGS_DATA_OFFSET=1,l.TRUN_FLAGS_FIRST_FLAG=4,l.TRUN_FLAGS_DURATION=256,l.TRUN_FLAGS_SIZE=512,l.TRUN_FLAGS_FLAGS=1024,l.TRUN_FLAGS_CTS_OFFSET=2048,l.Box.prototype.add=function(t){return this.addBox(new l[t+"Box"])},l.Box.prototype.addBox=function(t){return this.boxes.push(t),this[t.type+"s"]?this[t.type+"s"].push(t):this[t.type]=t,t},l.Box.prototype.set=function(t,e){return this[t]=e,this},l.Box.prototype.addEntry=function(t,e){var i=e||"entries";return this[i]||(this[i]=[]),this[i].push(t),this},t.BoxParser=l,l.parseUUID=function(t){return l.parseHex16(t)},l.parseHex16=function(t){for(var e="",i=0;i<16;i++){var s=t.readUint8().toString(16);e+=1===s.length?"0"+s:s}return e},l.parseOneBox=function(t,e,i){var s,n,a,o=t.getPosition(),h=0;if(t.getEndPosition()-o<8)return r.debug("BoxParser","Not enough data in stream to parse the type and size of the box"),{code:l.ERR_NOT_ENOUGH_DATA};if(i&&i<8)return r.debug("BoxParser","Not enough bytes left in the parent box to parse a new box"),{code:l.ERR_NOT_ENOUGH_DATA};var d=t.readUint32(),p=t.readString(4),f=p;if(r.debug("BoxParser","Found box of type '"+p+"' and size "+d+" at position "+o),h=8,"uuid"==p){if(t.getEndPosition()-t.getPosition()<16||i-h<16)return t.seek(o),r.debug("BoxParser","Not enough bytes left in the parent box to parse a UUID box"),{code:l.ERR_NOT_ENOUGH_DATA};h+=16,f=a=l.parseUUID(t)}if(1==d){if(t.getEndPosition()-t.getPosition()<8||i&&i-h<8)return t.seek(o),r.warn("BoxParser",'Not enough data in stream to parse the extended size of the "'+p+'" box'),{code:l.ERR_NOT_ENOUGH_DATA};d=t.readUint64(),h+=8}else if(0===d)if(i)d=i;else if("mdat"!==p)return r.error("BoxParser","Unlimited box size not supported for type: '"+p+"'"),s=new l.Box(p,d),{code:l.OK,box:s,size:s.size};return d<h?(r.error("BoxParser","Box of type "+p+" has an invalid size "+d+" (too small to be a box)"),{code:l.ERR_NOT_ENOUGH_DATA,type:p,size:d,hdr_size:h,start:o}):i&&d>i?(r.error("BoxParser","Box of type '"+p+"' has a size "+d+" greater than its container size "+i),{code:l.ERR_NOT_ENOUGH_DATA,type:p,size:d,hdr_size:h,start:o}):o+d>t.getEndPosition()?(t.seek(o),r.info("BoxParser","Not enough data in stream to parse the entire '"+p+"' box"),{code:l.ERR_NOT_ENOUGH_DATA,type:p,size:d,hdr_size:h,start:o}):e?{code:l.OK,type:p,size:d,hdr_size:h,start:o}:(l[p+"Box"]?s=new l[p+"Box"](d):"uuid"!==p?(r.warn("BoxParser","Unknown box type: '"+p+"'"),(s=new l.Box(p,d)).has_unparsed_data=!0):l.UUIDBoxes[a]?s=new l.UUIDBoxes[a](d):(r.warn("BoxParser","Unknown uuid type: '"+a+"'"),(s=new l.Box(p,d)).uuid=a,s.has_unparsed_data=!0),s.hdr_size=h,s.start=o,s.write===l.Box.prototype.write&&"mdat"!==s.type&&(r.info("BoxParser","'"+f+"' box writing not yet implemented, keeping unparsed data in memory for later write"),s.parseDataAndRewind(t)),s.parse(t),(n=t.getPosition()-(s.start+s.size))<0?(r.warn("BoxParser","Parsing of box '"+f+"' did not read the entire indicated box data size (missing "+-n+" bytes), seeking forward"),t.seek(s.start+s.size)):n>0&&(r.error("BoxParser","Parsing of box '"+f+"' read "+n+" more bytes than the indicated box data size, seeking backwards"),t.seek(s.start+s.size)),{code:l.OK,box:s,size:s.size})},l.Box.prototype.parse=function(t){"mdat"!=this.type?this.data=t.readUint8Array(this.size-this.hdr_size):0===this.size?t.seek(t.getEndPosition()):t.seek(this.start+this.size)},l.Box.prototype.pars