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<!DOCTYPE html>
<html lang="en">
<head>
<title>MediaInfo JavaScript test page</title>
</head>
<body>
<p>
<input type="file" id="input" />
</p>
<p><pre id="result"></pre></p>
<script type="text/javascript">
// Load the WebAssembly MediaInfo module if the browser supports it,
// otherwise load the asmjs module
var MediaInfoJs = document.createElement('script');
if ('WebAssembly' in window) {
MediaInfoJs.src = "MediaInfoWasm.js";
} else {
MediaInfoJs.src = "MediaInfo.js";
}
document.body.appendChild(MediaInfoJs);
// Continue initialization
MediaInfoJs.onload = function () {
var MediaInfoModule, MI, processing = false, CHUNK_SIZE = 1024 * 1024;
var finish = function() {
MI.Close();
MI.delete();
processing = false;
}
// Examples about how to get results
var showResult = function() {
document.getElementById('result').innerText = 'Inform with Complete=false:\n';
MI.Option('Complete');
document.getElementById('result').innerText += MI.Inform();
document.getElementById('result').innerText += 'Inform with Complete=true:\n';
MI.Option('Complete', '1');
document.getElementById('result').innerText += MI.Inform();
document.getElementById('result').innerText += 'Custom Inform:\n';
MI.Option('Inform', 'General;Example: FileSize=%FileSize%')
document.getElementById('result').innerText += MI.Inform() + '\n\n';
MI.Option('Inform'); // Reset custom output
document.getElementById('result').innerText += 'Get with Stream=General and Parameter=\'FileSize\':\n';
document.getElementById('result').innerText += MI.Get(MediaInfoModule.Stream.General, 0, 'FileSize') + '\n\n';
document.getElementById('result').innerText += 'GetI with Stream=General, Parameter=2, and InfoKind=Name:\n';
document.getElementById('result').innerText += MI.GetI(MediaInfoModule.Stream.General, 0, 2, MediaInfoModule.Info.Name) + '\n\n';
document.getElementById('result').innerText += 'GetI with Stream=General, Parameter=2, and InfoKind=Text:\n';
document.getElementById('result').innerText += MI.GetI(MediaInfoModule.Stream.General, 0, 2) + '\n\n';
document.getElementById('result').innerText += 'Count_Get with StreamKind=Audio:\n';
document.getElementById('result').innerText += MI.Count_Get(MediaInfoModule.Stream.Audio) + '\n\n';
document.getElementById('result').innerText += 'Get with Stream=General and Parameter=\'AudioCount\':\n';
document.getElementById('result').innerText += MI.Get(MediaInfoModule.Stream.General, 0, 'AudioCount') + '\n\n';
document.getElementById('result').innerText += 'Get with Stream=Audio and Parameter=\'StreamCount\':\n';
document.getElementById('result').innerText += MI.Get(MediaInfoModule.Stream.Audio, 0, 'StreamCount') + '\n';
finish();
}
var parseFile = function(file, callback) {
if (processing) {
return;
}
processing = true;
var offset = 0;
// Initialise MediaInfo
MI = new MediaInfoModule.MediaInfo();
//Open the file
MI.Open(file, callback);
/* By buffer example:
MI.Option('File_FileName', file.name);
MI.Open_Buffer_Init(file.size, 0);
var loop = function(length) {
if (processing) {
var r = new FileReader();
var blob = file.slice(offset, offset + length);
r.onload = processChunk;
r.readAsArrayBuffer(blob);
} else {
finish()
}
};
var processChunk = function(e) {
if (e.target.error === null) {
// Send the buffer to MediaInfo
var state = MI.Open_Buffer_Continue(e.target.result);
//Test if there is a MediaInfo request to go elsewhere
var seekTo = MI.Open_Buffer_Continue_Goto_Get();
if(seekTo === -1) {
offset += e.target.result.byteLength;
} else {
offset = seekTo;
MI.Open_Buffer_Init(file.size, seekTo); // Inform MediaInfo we have seek
}
} else {
finish();
alert('An error happened reading your file!');
return;
}
// Bit 3 set means finalized
if (state&0x08 || e.target.result.byteLength < 1) {
MI.Open_Buffer_Finalize();
callback();
return;
}
loop(CHUNK_SIZE);
};
// Start
loop(CHUNK_SIZE);*/
}
// Initialise emscripten module
MediaInfoModule = MediaInfoLib({'postRun': function() {
console.debug('MediaInfo ready');
// Information about MediaInfo
document.getElementById('result').innerText = 'Info_Parameters:\n';
document.getElementById('result').innerText += MediaInfoModule.MediaInfo.Option_Static('Info_Parameters') + '\n\n';
document.getElementById('result').innerText += 'Info_Codecs:\n';
document.getElementById('result').innerText += MediaInfoModule.MediaInfo.Option_Static('Info_Codecs') + '\n';
// Get selected file
var input = document.getElementById('input');
input.onchange = function() {
if(input.files.length > 0) {
document.getElementById('result').innerText = "Processing...";
parseFile(input.files[0], showResult);
}
}
}});};
</script>
</body>
</html>
|
