b38dea0597
Share Gaia assets and adapters, keep private profiles and development documents local, and update both public READMEs.
30 lines
No EOL
4.8 KiB
JavaScript
30 lines
No EOL
4.8 KiB
JavaScript
;'use strict';var metadataQueue=[];var processingQueue=false;var stopParsingMetadataCallback=null;var noMoreWorkCallback=null;function addToMetadataQueue(fileinfo){metadataQueue.push(fileinfo);startParsingMetadata();}
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function startParsingMetadata(){if(processingQueue){return;}
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if(metadataQueue.length===0){if(noMoreWorkCallback){noMoreWorkCallback();noMoreWorkCallback=null;}
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return;}
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if(document.hidden||playerShowing){return;}
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if(videodb.state!==MediaDB.READY){return;}
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processingQueue=true;showThrobber();processFirstQueuedItem();}
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function stopParsingMetadata(callback){if(!processingQueue){if(callback){callback();}
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return;}
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stopParsingMetadataCallback=callback||true;}
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function processFirstQueuedItem(){if(stopParsingMetadataCallback){var callback=stopParsingMetadataCallback;stopParsingMetadataCallback=null;processingQueue=false;hideThrobber();if(callback!==true){callback();}
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return;}
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if(metadataQueue.length===0){processingQueue=false;hideThrobber();updateDialog();if(typeof(noMoreWorkCallback)==='function'){noMoreWorkCallback();}
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return;}
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var fileinfo=metadataQueue.shift();videodb.getFile(fileinfo.name,function(file){getMetadata(file,function(metadata){fileinfo.metadata=metadata;videodb.updateMetadata(fileinfo.name,metadata,function(){if(metadata.isVideo){videodb.getFileInfo(fileinfo.name,function(dbfileinfo){addVideo(dbfileinfo);});}});setTimeout(processFirstQueuedItem);});},function(err){console.error('getFile error: ',fileinfo.name,err);processFirstQueuedItem();});}
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function getMetadata(videofile,callback){var offscreenVideo=document.createElement('video');var metadata={};if(!offscreenVideo.canPlayType(videofile.type)){metadata.isVideo=false;callback(metadata);return;}
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var url=URL.createObjectURL(videofile);offscreenVideo.preload='metadata';offscreenVideo.src=url;const METADATA_TIMEOUT=3000;var timeoutId=setTimeout(function(){console.error('No loadedmetadata or error events seen yet.','Assuming video file is corrupt:',videofile.name);offscreenVideo.onerror();},METADATA_TIMEOUT);offscreenVideo.onerror=function(e){console.error('Can\'t play video',videofile.name,e);metadata.isVideo=false;clearTimeout(timeoutId);unload();callback(metadata);};offscreenVideo.onloadedmetadata=function(){clearTimeout(timeoutId);if(!offscreenVideo.videoWidth){metadata.isVideo=false;unload();callback(metadata);return;}
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metadata.isVideo=true;metadata.title=readFromMetadata('title')||fileNameToVideoName(videofile.name);metadata.duration=offscreenVideo.duration;metadata.width=offscreenVideo.videoWidth;metadata.height=offscreenVideo.videoHeight;if(/.3gp$/.test(videofile.name)){getVideoRotation(videofile,function(rotation){if(typeof rotation==='number'){metadata.rotation=rotation;}
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else if(typeof rotation==='string'){console.warn('Video rotation:',rotation);}
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createThumbnail();});}else{metadata.rotation=0;createThumbnail();}};function readFromMetadata(lowerCaseKey){var tags=offscreenVideo.mozGetMetadata();for(var key in tags){if(key.toLowerCase()===lowerCaseKey){return tags[key];}}
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return;}
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function createThumbnail(){var t=Math.min(5,offscreenVideo.duration/10);offscreenVideo.fastSeek(t);var failed=false;var timeout=setTimeout(fail,10000);offscreenVideo.onerror=fail;function fail(){console.warn('Seek failed while creating thumbnail for',videofile.name,'. Ignoring corrupt file.');failed=true;clearTimeout(timeout);offscreenVideo.onerror=null;metadata.isVideo=false;unload();callback(metadata);}
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offscreenVideo.onseeked=function(){if(failed){return;}
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clearTimeout(timeout);captureFrame(offscreenVideo,metadata,function(poster){metadata.poster=poster;unload();callback(metadata);});};}
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function unload(){URL.revokeObjectURL(offscreenVideo.src);offscreenVideo.removeAttribute('src');offscreenVideo.load();}
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function fileNameToVideoName(filename){filename=filename.split('/').pop().replace(/\.(webm|ogv|ogg|mp4|3gp)$/,'').replace(/[_\.]/g,' ');return filename.charAt(0).toUpperCase()+filename.slice(1);}}
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function captureFrame(player,metadata,callback){try{var canvas=document.createElement('canvas');canvas.width=THUMBNAIL_WIDTH;canvas.height=THUMBNAIL_HEIGHT;var ctx=canvas.getContext('2d',{willReadFrequently:true});var vw=player.videoWidth,vh=player.videoHeight;var tw,th;switch(metadata.rotation){case 90:ctx.translate(THUMBNAIL_WIDTH,0);ctx.rotate(Math.PI/2);tw=THUMBNAIL_HEIGHT;th=THUMBNAIL_WIDTH;break;case 180:ctx.translate(THUMBNAIL_WIDTH,THUMBNAIL_HEIGHT);ctx.rotate(Math.PI);tw=THUMBNAIL_WIDTH;th=THUMBNAIL_HEIGHT;break;case 270:ctx.translate(0,THUMBNAIL_HEIGHT);ctx.rotate(-Math.PI/2);tw=THUMBNAIL_HEIGHT;th=THUMBNAIL_WIDTH;break;default:tw=THUMBNAIL_WIDTH;th=THUMBNAIL_HEIGHT;break;}
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var scale=Math.min(tw/vw,th/vh),w=scale*vw,h=scale*vh,x=(tw-w)/2/scale,y=(th-h)/2/scale;ctx.scale(scale,scale);ctx.drawImage(player,x,y);canvas.toBlob(done,'image/jpeg');}
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catch(e){console.error('Exception in captureFrame:',e,e.stack);done(null);}
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function done(blob){canvas.width=0;ctx=canvas=null;callback(blob);}} |