| var audioCodecs = [ |
| ["audio/wav", "wav"], |
| ["audio/aac", "m4a"], |
| ["audio/mpeg", "mp3"], |
| ["audio/ogg", "oga"] |
| ]; |
| |
| var videoCodecs = [ |
| ["video/mp4", "mp4"], |
| ["video/mpeg", "mpg"], |
| ["video/quicktime", "mov"], |
| ["video/ogg", "ogv"] |
| ]; |
| |
| function findMediaFile(tagName, name) { |
| var codecs; |
| if (tagName == "audio") |
| codecs = audioCodecs; |
| else |
| codecs = videoCodecs; |
| |
| var element = document.getElementsByTagName(tagName)[0]; |
| if (!element) |
| element = document.createElement(tagName); |
| |
| for (var i = 0; i < codecs.length; ++i) { |
| if (element.canPlayType(codecs[i][0])) |
| return name + "." + codecs[i][1]; |
| } |
| |
| return ""; |
| } |
| |
| function mimeTypeForExtension(extension) { |
| for (var i = 0; i < videoCodecs.length; ++i) { |
| if (extension == videoCodecs[i][1]) |
| return videoCodecs[i][0]; |
| } |
| for (var i = 0; i < audioCodecs.length; ++i) { |
| if (extension == audioCodecs[i][1]) |
| return audioCodecs[i][0]; |
| } |
| |
| return ""; |
| } |
| |
| function mimeTypeForFile(filename) { |
| var lastPeriodIndex = filename.lastIndexOf("."); |
| if (lastPeriodIndex > 0) |
| return mimeTypeForExtension(filename.substring(lastPeriodIndex + 1)); |
| |
| return ""; |
| } |
| |
| function setSrcByTagName(tagName, src) { |
| var elements = document.getElementsByTagName(tagName); |
| if (elements) { |
| for (var i = 0; i < elements.length; ++i) |
| elements[i].src = src; |
| } |
| } |
| |
| function setSrcById(id, src) { |
| var element = document.getElementById(id); |
| if (element) |
| element.src = src; |
| } |
| |
| function stripExtension(filename) { |
| var lastPeriodIndex = filename.lastIndexOf("."); |
| if (lastPeriodIndex > 0) |
| return filename.substring(0, lastPeriodIndex); |
| return filename; |
| } |
| |
| function handlePromise(promise) { |
| function handle() { } |
| return promise.then(handle, handle); |
| } |
| |
| // The base64'd data below was generated from the corresponding content/test.{mp4,ogv} files with: |
| // rm -f test-frame.ogv test-frame.mp4 && \ |
| // ~/tmp/ffmpeg/ffmpeg -i test.mp4 -an -vframes 1 test-frame.png && \ |
| // pngtopnm test-frame.png > test-frame.pnm && pnmscale 0.25 test-frame.pnm|pnmtopng > test-frame.png && \ |
| // ~/tmp/ffmpeg/ffmpeg -i test-frame.png -an -vframes 1 -s 80x60 test-frame.mp4 && \ |
| // ffmpeg2theora test-frame.mp4 -o test-frame.ogv && rm test-frame.png test-frame.pnm |
| // Followed by [base64 -w 120 test-frame.ogv] and [base64 -w 120 test-frame.mp4]. |
| // |
| |
| const dataURLs = { |
| "mp4" : `data:video/mp4;base64, |
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| AAAAAAAAACgAAAAAAAAAAAAAAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAABAAAAAAAAAAAAAAAAAABAAAAAAFAAAAA8AAAAAAAkZWR0cwAAABxlbHN0AAAAAAAA |
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| AQAAAABMYXZmNTQuMC4xMDA=`, |
| |
| "ogg" : `data:video/ogg;base64, |
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| 1xSRjyffmuz+ZZnIo6iK81o5jPqjLad2pJVNlxcrFNTU1NxMGZmYZLw9FOO1MMyzMZOXW2i5f+SZOTWvXrxbvWtF9F/qpM8k7VWZ1srpVdmc/rNt5671q/4o |
| aPLioDn63vKe+3TsR1QdT3cbbX29dJhFWxGfPji8uow/RvEdxN26QXd3d3dmltxmvn9xX41q7lJ+EyZMmTJk5d7e2lt4T80idGzp5p4ZOwcwt9MfSg2px6rr |
| OjC7dunTLPnPm37py9tZjaU10a2lujlPd5ZYZbWZmZmYa7t76epZjI6IyFSpUiRI6tO81MJ+FSshXxUNo2qCYteb6DTfQ7eWHcYqrx8q3N+WmphpSJJJJM/j |
| 1au8t2/m25K9evXr169fcx23mLqG6yrVvctNSdG9PTPz32j10DtUeJJJCiPs2L3slpLcg3LLLJJJQaTfR9IalPOLMvdptttts9C1Q35jwWm306Lp06dOnTp0 |
| aWtuFpwSSSSHPcIguQA=`, |
| }; |
| |
| function dataURL(type) |
| { |
| const url = dataURLs[type]; |
| if (!url) |
| console.log(`No base64 url for type ${type}`) |
| |
| return url; |
| } |
| |
| function findDataURL(tagName) { |
| let element = document.getElementsByTagName(tagName)[0]; |
| if (!element) |
| element = document.createElement(tagName); |
| |
| for (let type in dataURLs) { |
| if (element.canPlayType(`${tagName}/${type}`)) |
| return dataURLs[type]; |
| } |
| |
| console.log(`No base64 url for type ${type}`) |
| return ''; |
| } |
