mp4-inspector_test.js
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(function(window, videojs) {
'use strict';
/*
======== A Handy Little QUnit Reference ========
http://api.qunitjs.com/
Test methods:
module(name, {[setup][ ,teardown]})
test(name, callback)
expect(numberOfAssertions)
stop(increment)
start(decrement)
Test assertions:
ok(value, [message])
equal(actual, expected, [message])
notEqual(actual, expected, [message])
deepEqual(actual, expected, [message])
notDeepEqual(actual, expected, [message])
strictEqual(actual, expected, [message])
notStrictEqual(actual, expected, [message])
throws(block, [expected], [message])
*/
var
Uint8Array = window.Uint8Array,
typeBytes = function(type) {
return [
type.charCodeAt(0),
type.charCodeAt(1),
type.charCodeAt(2),
type.charCodeAt(3)
];
},
box = function(type) {
var
array = Array.prototype.slice.call(arguments, 1),
result = [],
size,
i;
// "unwrap" any arrays that were passed as arguments
// e.g. box('etc', 1, [2, 3], 4) -> box('etc', 1, 2, 3, 4)
for (i = 0; i < array.length; i++) {
if (array[i] instanceof Array) {
array.splice.apply(array, [i, 1].concat(array[i]));
}
}
size = 8 + array.length;
result[0] = (size & 0xFF000000) >> 24;
result[1] = (size & 0x00FF0000) >> 16;
result[2] = (size & 0x0000FF00) >> 8;
result[3] = size & 0xFF;
result = result.concat(typeBytes(type));
result = result.concat(array);
return result;
},
unityMatrix = [
0, 0, 0x10, 0,
0, 0, 0, 0,
0, 0, 0, 0,
0, 0, 0, 0,
0, 0, 0x10, 0,
0, 0, 0, 0,
0, 0, 0, 0,
0, 0, 0, 0,
0x40, 0, 0, 0
],
mvhd0 = box('mvhd',
0x00, // version 0
0x00, 0x00, 0x00, // flags
0x00, 0x00, 0x00, 0x01, // creation_time
0x00, 0x00, 0x00, 0x02, // modification_time
0x00, 0x00, 0x00, 0x3c, // timescale
0x00, 0x00, 0x02, 0x58, // 600 = 0x258 duration
0x00, 0x01, 0x00, 0x00, // 1.0 rate
0x01, 0x00, // 1.0 volume
0x00, 0x00, // reserved
0x00, 0x00, 0x00, 0x00, // reserved
0x00, 0x00, 0x00, 0x00, // reserved
unityMatrix,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, // pre_defined
0x00, 0x00, 0x00, 0x02),
tkhd0 = box('tkhd',
0x00, // version 0
0x00, 0x00, 0x00, // flags
0x00, 0x00, 0x00, 0x02, // creation_time
0x00, 0x00, 0x00, 0x03, // modification_time
0x00, 0x00, 0x00, 0x01, // track_ID
0x00, 0x00, 0x00, 0x00, // reserved
0x00, 0x00, 0x02, 0x58, // 600 = 0x258 duration
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, // reserved
0x00, 0x00, // layer
0x00, 0x00, // alternate_group
0x00, 0x00, // non-audio track volume
0x00, 0x00, // reserved
unityMatrix,
0x00, 0x00, 0x01, 0x2c, // 300 = 0x12c width
0x00, 0x00, 0x00, 0x96), // 150 = 0x96 height
mdhd0 = box('mdhd',
0x00, // version 1
0x00, 0x00, 0x00, // flags
0x00, 0x00, 0x00, 0x02, // creation_time
0x00, 0x00, 0x00, 0x03, // modification_time
0x00, 0x00, 0x00, 0x3c, // timescale
0x00, 0x00, 0x02, 0x58, // 600 = 0x258 duration
0x15, 0xc7, // 'eng' language
0x00, 0x00);
module('MP4 Inspector');
test('produces an empty array for empty input', function() {
strictEqual(videojs.inspectMp4(new Uint8Array([])).length, 0, 'returned an empty array');
});
test('can parse a Box', function() {
var box = new Uint8Array([
0x00, 0x00, 0x00, 0x00, // size 0
0x00, 0x00, 0x00, 0x00 // boxtype 0
]);
deepEqual(videojs.inspectMp4(box), [{
type: '\u0000\u0000\u0000\u0000',
size: 0,
data: box.subarray(box.byteLength)
}], 'parsed a Box');
});
test('can parse an ftyp', function() {
deepEqual(videojs.inspectMp4(new Uint8Array(box('ftyp',
0x00, 0x00, 0x00, 0x01, // major brand
0x00, 0x00, 0x00, 0x02, // minor version
0x00, 0x00, 0x00, 0x03, // compatible brands
0x00, 0x00, 0x00, 0x04 // compatible brands
))), [{
type: 'ftyp',
size: 4 * 6,
majorBrand: 1,
minorVersion: 2,
compatibleBrands: [3, 4]
}], 'parsed an ftyp');
});
test('can parse a pdin', function() {
deepEqual(videojs.inspectMp4(new Uint8Array(box('pdin',
0x01, // version 1
0x01, 0x02, 0x03, // flags
0x00, 0x00, 0x04, 0x00, // 1024 = 0x400 bytes/second rate
0x00, 0x00, 0x00, 0x01 // initial delay
))), [{
size: 20,
type: 'pdin',
version: 1,
flags: new Uint8Array([1, 2, 3]),
rate: 1024,
initialDelay: 1
}], 'parsed a pdin');
});
test('can parse an mdat', function() {
var mdat = new Uint8Array(box('mdat',
0x01, 0x02, 0x03, 0x04 // data
));
deepEqual(videojs.inspectMp4(mdat), [{
size: 12,
type: 'mdat',
byteLength: 4
}], 'parsed an mdat');
});
test('can parse a free or skip', function() {
var
free = new Uint8Array(box('free',
0x01, 0x02, 0x03, 0x04)), // data
skip = new Uint8Array(box('skip',
0x01, 0x02, 0x03, 0x04)); // data
deepEqual(videojs.inspectMp4(free), [{
size: 12,
type: 'free',
data: free.subarray(free.byteLength - 4)
}], 'parsed a free');
deepEqual(videojs.inspectMp4(skip), [{
size: 12,
type: 'skip',
data: skip.subarray(skip.byteLength - 4)
}], 'parsed a skip');
});
test('can parse a version 0 mvhd', function() {
deepEqual(videojs.inspectMp4(new Uint8Array(mvhd0)), [{
type: 'mvhd',
version: 0,
flags: new Uint8Array([0, 0, 0]),
creationTime: 1,
modificationTime: 2,
timescale: 60,
duration: 600,
rate: 1,
volume: 1,
matrix: new Uint32Array(unityMatrix),
size: 108,
nextTrackId: 2
}]);
});
test('can parse a version 0 tkhd', function() {
deepEqual(videojs.inspectMp4(new Uint8Array(tkhd0)), [{
type: 'tkhd',
version: 0,
flags: new Uint8Array([0, 0, 0]),
creationTime: 2,
modificationTime: 3,
size: 92,
trackId: 1,
duration: 600,
layer: 0,
alternateGroup: 0,
volume: 0,
matrix: new Uint32Array(unityMatrix),
width: 300,
height: 150
}]);
});
test('can parse a version 0 mdhd', function() {
deepEqual(videojs.inspectMp4(new Uint8Array(mdhd0)), [{
type: 'mdhd',
version: 0,
flags: new Uint8Array([0, 0, 0]),
creationTime: 2,
modificationTime: 3,
size: 32,
timescale: 60,
duration: 600,
language: 'eng'
}]);
});
test('can parse a moov', function() {
var data =
box('moov',
box('mvhd',
0x01, // version 1
0x00, 0x00, 0x00, // flags
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x01, // creation_time
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x02, // modification_time
0x00, 0x00, 0x00, 0x3c, // timescale
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x02, 0x58, // 600 = 0x258 duration
0x00, 0x01, 0x00, 0x00, // 1.0 rate
0x01, 0x00, // 1.0 volume
0x00, 0x00, // reserved
0x00, 0x00, 0x00, 0x00, // reserved
0x00, 0x00, 0x00, 0x00, // reserved
unityMatrix,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, // pre_defined
0x00, 0x00, 0x00, 0x02), // next_track_ID
box('trak',
box('tkhd',
0x01, // version 1
0x00, 0x00, 0x00, // flags
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x02, // creation_time
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x03, // modification_time
0x00, 0x00, 0x00, 0x01, // track_ID
0x00, 0x00, 0x00, 0x00, // reserved
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x02, 0x58, // 600 = 0x258 duration
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, // reserved
0x00, 0x00, // layer
0x00, 0x00, // alternate_group
0x00, 0x00, // non-audio track volume
0x00, 0x00, // reserved
unityMatrix,
0x00, 0x00, 0x01, 0x2c, // 300 = 0x12c width
0x00, 0x00, 0x00, 0x96), // 150 = 0x96 height
box('mdia',
box('mdhd',
0x01, // version 1
0x00, 0x00, 0x00, // flags
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x02, // creation_time
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x03, // modification_time
0x00, 0x00, 0x00, 0x3c, // timescale
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x02, 0x58, // 600 = 0x258 duration
0x15, 0xc7, // 'eng' language
0x00, 0x00),
box('hdlr',
0x01, // version 1
0x00, 0x00, 0x00, // flags
0x00, 0x00, 0x00, 0x00, // pre_defined
typeBytes('vide'), // handler_type
0x00, 0x00, 0x00, 0x00, // reserved
0x00, 0x00, 0x00, 0x00, // reserved
0x00, 0x00, 0x00, 0x00, // reserved
typeBytes('one'), 0x00), // name
box('minf',
box('dinf',
box('dref',
0x01, // version 1
0x00, 0x00, 0x00, // flags
0x00, 0x00, 0x00, 0x00)), // entry_count
box('stbl',
box('stsd',
0x01, // version 1
0x00, 0x00, 0x00, // flags
0x00, 0x00, 0x00, 0x00), // entry_count
box('stts',
0x01, // version 1
0x00, 0x00, 0x00, // flags
0x00, 0x00, 0x00, 0x00), // entry_count
box('stsc',
0x01, // version 1
0x00, 0x00, 0x00, // flags
0x00, 0x00, 0x00, 0x00), // entry_count
box('stco',
0x01, // version 1
0x00, 0x00, 0x00, // flags
0x00, 0x00, 0x00, 0x00)))))); // entry_count;
deepEqual(videojs.inspectMp4(new Uint8Array(data)), [{
size: 433,
type: 'moov',
boxes: [{
type: 'mvhd',
version: 1,
flags: new Uint8Array([0, 0, 0]),
creationTime: 1,
modificationTime: 2,
timescale: 60,
duration: 600,
rate: 1,
size: 120,
volume: 1,
matrix: new Uint32Array(unityMatrix),
nextTrackId: 2
}, {
type: 'trak',
size: 305,
boxes: [{
type: 'tkhd',
flags: new Uint8Array([0, 0, 0]),
version: 1,
creationTime: 2,
modificationTime: 3,
size: 104,
trackId: 1,
duration: 600,
layer: 0,
alternateGroup: 0,
volume: 0,
matrix: new Uint32Array(unityMatrix),
width: 300,
height: 150
}, {
type: 'mdia',
size: 193,
boxes: [{
type: 'mdhd',
version: 1,
flags: new Uint8Array([0, 0, 0]),
creationTime: 2,
modificationTime: 3,
timescale: 60,
duration: 600,
language: 'eng',
size: 44
}, {
type: 'hdlr',
version: 1,
flags: new Uint8Array([0, 0, 0]),
handlerType: 'vide',
name: 'one',
size: 37
}, {
type: 'minf',
size: 104,
boxes: [{
type: 'dinf',
size: 24,
boxes: [{
type: 'dref',
dataReferences: [],
size: 16
}]}, {
type: 'stbl',
size: 72,
boxes: [{
type: 'stsd',
sampleDescriptions: [],
size: 16
}, {
type: 'stts',
timeToSamples: [],
size: 16
}, {
type: 'stsc',
sampleToChunks: [],
size: 16
}, {
type: 'stco',
chunkOffsets: [],
size: 16
}]
}]
}]
}]
}]
}], 'parsed a moov');
});
test('can parse a series of boxes', function() {
var ftyp = [
0x00, 0x00, 0x00, 0x18 // size 4 * 6 = 24
].concat(typeBytes('ftyp')).concat([
0x00, 0x00, 0x00, 0x01, // major brand
0x00, 0x00, 0x00, 0x02, // minor version
0x00, 0x00, 0x00, 0x03, // compatible brands
0x00, 0x00, 0x00, 0x04, // compatible brands
]);
deepEqual(videojs.inspectMp4(new Uint8Array(ftyp.concat(ftyp))),
[{
type: 'ftyp',
size: 4 * 6,
majorBrand: 1,
minorVersion: 2,
compatibleBrands: [3, 4]
},{
type: 'ftyp',
size: 4 * 6,
majorBrand: 1,
minorVersion: 2,
compatibleBrands: [3, 4]
}],
'parsed two boxes in series');
});
})(window, window.videojs);