mp4box/src/writing/stsz.js

JavaScript version of GPAC's MP4Box tool

BoxParser.stszBox.prototype.write = function(stream) {
	var i;
	var constant = true;
	this.version = 0;
	this.flags = 0;
	if (this.sample_sizes.length > 0) {
		i = 0;
		while (i+1 < this.sample_sizes.length) {
			if (this.sample_sizes[i+1] !==  this.sample_sizes[0]) {
				constant = false;
				break;
			} else {
				i++;
			}
		}
	} else {
		constant = false;
	}
	this.size = 8;
	if (!constant) {
		this.size += 4*this.sample_sizes.length;
	}
	this.writeHeader(stream);
	if (!constant) {
		stream.writeUint32(0);
	} else {
		stream.writeUint32(this.sample_sizes[0]);
	}
	stream.writeUint32(this.sample_sizes.length);
	if (!constant) {
		stream.writeUint32Array(this.sample_sizes);
	}	
}