mp4box/src/box-unpack.js

JavaScript version of GPAC's MP4Box tool

/* 
 * Copyright (c) Telecom ParisTech/TSI/MM/GPAC Cyril Concolato
 * License: BSD-3-Clause (see LICENSE file)
 */
BoxParser.cttsBox.prototype.unpack = function(samples) {
	var i, j, k;
	k = 0;
	for (i = 0; i < this.sample_counts.length; i++) {
		for (j = 0; j < this.sample_counts[i]; j++) {
			samples[k].pts = samples[k].dts + this.sample_offsets[i];
			k++;
		}
	}
}

BoxParser.sttsBox.prototype.unpack = function(samples) {
	var i, j, k;
	k = 0;
	for (i = 0; i < this.sample_counts.length; i++) {
		for (j = 0; j < this.sample_counts[i]; j++) {
			if (k === 0) {
				samples[k].dts = 0;
			} else {
				samples[k].dts = samples[k-1].dts + this.sample_deltas[i];
			}
			k++;
		}
	}
}

BoxParser.stcoBox.prototype.unpack = function(samples) {
	var i;
	for (i = 0; i < this.chunk_offsets.length; i++) {
		samples[i].offset = this.chunk_offsets[i];
	}
}

BoxParser.stscBox.prototype.unpack = function(samples) {
	var i, j, k, l, m;
	l = 0;
	m = 0;
	for (i = 0; i < this.first_chunk.length; i++) {
		for (j = 0; j < (i+1 < this.first_chunk.length ? this.first_chunk[i+1] : Infinity); j++) {
			m++;
			for (k = 0; k < this.samples_per_chunk[i]; k++) {
				if (samples[l]) {
					samples[l].description_index = this.sample_description_index[i];
					samples[l].chunk_index = m;
				} else {
					return;
				}
				l++;
			}			
		}
	}
}

BoxParser.stszBox.prototype.unpack = function(samples) {
	var i;
	for (i = 0; i < this.sample_sizes.length; i++) {
		samples[i].size = this.sample_sizes[i];
	}
}