mp4box.js/src/writing/sampleentry.js at master · gpac/mp4box.js · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
BoxParser.SampleEntry.prototype.writeHeader = function(stream) {
	this.size = 8;
	BoxParser.Box.prototype.writeHeader.call(this, stream);
	stream.writeUint8(0);
	stream.writeUint8(0);
	stream.writeUint8(0);
	stream.writeUint8(0);
	stream.writeUint8(0);
	stream.writeUint8(0);
	stream.writeUint16(this.data_reference_index);
}

BoxParser.SampleEntry.prototype.writeFooter = function(stream) {
	for (var i=0; i<this.boxes.length; i++) {
		this.boxes[i].write(stream);
		this.size += this.boxes[i].size;
	}
	Log.debug("BoxWriter", "Adjusting box "+this.type+" with new size "+this.size);
	stream.adjustUint32(this.sizePosition, this.size);
}

BoxParser.SampleEntry.prototype.write = function(stream) {
	this.writeHeader(stream);
	stream.writeUint8Array(this.data);
	this.size += this.data.length;
	Log.debug("BoxWriter", "Adjusting box "+this.type+" with new size "+this.size);
	stream.adjustUint32(this.sizePosition, this.size);
}

BoxParser.VisualSampleEntry.prototype.write = function(stream) {
	this.writeHeader(stream);
	this.size += 2*7+6*4+32;
	stream.writeUint16(0);
	stream.writeUint16(0);
	stream.writeUint32(0);
	stream.writeUint32(0);
	stream.writeUint32(0);
	stream.writeUint16(this.width);
	stream.writeUint16(this.height);
	stream.writeUint32(this.horizresolution);
	stream.writeUint32(this.vertresolution);
	stream.writeUint32(0);
	stream.writeUint16(this.frame_count);
	stream.writeUint8(Math.min(31, this.compressorname.length));
	stream.writeString(this.compressorname, null, 31);
	stream.writeUint16(this.depth);
	stream.writeInt16(-1);
	this.writeFooter(stream);
}

BoxParser.AudioSampleEntry.prototype.write = function(stream) {
	this.writeHeader(stream);
	this.size += 2*4+3*4;
	stream.writeUint32(0);
	stream.writeUint32(0);
	stream.writeUint16(this.channel_count);
	stream.writeUint16(this.samplesize);
	stream.writeUint16(0);
	stream.writeUint16(0);
	stream.writeUint32(this.samplerate<<16);
	this.writeFooter(stream);
}

BoxParser.stppSampleEntry.prototype.write = function(stream) {
	this.writeHeader(stream);
	this.size += this.namespace.length+1+
				 this.schema_location.length+1+
				 this.auxiliary_mime_types.length+1;
	stream.writeCString(this.namespace);
	stream.writeCString(this.schema_location);
	stream.writeCString(this.auxiliary_mime_types);
	this.writeFooter(stream);
}