codecs-video-avc.js

function getAllAVCCodecs()
{
	var AVC_PROFILES_DESC = [
		//{ constrained_set0_flag: true },
		//{ constrained_set1_flag: true },
		//{ constrained_set2_flag: true },
		{ profile_idc: 66, description: "Baseline" },
		{ profile_idc: 66, description: "Constrained Baseline", constrained_set1_flag: true},
		{ profile_idc: 77, description: "Main" },
        { profile_idc: 77, description: "Constrained Main", constrained_set1_flag: true},
		{ profile_idc: 88, description: "Extended" },
		{ profile_idc: 100, description: "High", constrained_set4_flag: false },
		{ profile_idc: 100, description: "High Progressive", constrained_set4_flag: true },
		{ profile_idc: 100, description: "Constrained High", constrained_set4_flag: true, constrained_set5_flag: true },
		{ profile_idc: 110, description: "High 10" },
		{ profile_idc: 110, description: "High 10 Intra", constrained_set3_flag: true },
		{ profile_idc: 122, description: "High 4:2:2" },
		{ profile_idc: 122, description: "High 4:2:2 Intra", constrained_set3_flag: true },
		{ profile_idc: 244, description: "High 4:4:4 Predictive" },
		{ profile_idc: 244, description: "High 4:4:4 Intra", constrained_set3_flag: true },
		{ profile_idc: 44, description: "CAVLC 4:4:4 Intra" }
	];

	var AVC_PROFILES_IDC = [ 66, 77, 88, 100, 110, 122, 244, 44];
	var AVC_CONSTRAINTS = [ 0, 4, 8, 16, 32, 64, 128 ];
	var AVC_LEVELS = [ 10, 11, 12, 13, 20, 21, 22, 30, 31, 32, 40, 41, 42, 50, 51, 52];

	var sj, sk, sl;
	var mimes = [];
	for (var j in AVC_PROFILES_IDC) {
		var sj = AVC_PROFILES_IDC[j].toString(16);
		if (sj.length == 1) sj = "0"+sj;
		for (var k in AVC_CONSTRAINTS) {
			sk = AVC_CONSTRAINTS[k].toString(16);
			if (sk.length == 1) sk = "0"+sk;

			var desc = "";
			for (i in AVC_PROFILES_DESC) {
				if (AVC_PROFILES_IDC[j] == AVC_PROFILES_DESC[i].profile_idc) {
					var c = ((AVC_PROFILES_DESC[i].constrained_set0_flag ? 1 : 0) << 7) |
					        ((AVC_PROFILES_DESC[i].constrained_set1_flag ? 1 : 0) << 6) |
					        ((AVC_PROFILES_DESC[i].constrained_set2_flag ? 1 : 0) << 5) |
					        ((AVC_PROFILES_DESC[i].constrained_set3_flag ? 1 : 0) << 4) |
					        ((AVC_PROFILES_DESC[i].constrained_set4_flag ? 1 : 0) << 3) |
					        ((AVC_PROFILES_DESC[i].constrained_set5_flag ? 1 : 0) << 2);
					if (c === AVC_CONSTRAINTS[k]) {
						desc = AVC_PROFILES_DESC[i].description;
						break;
					}
				}
			}
			if (desc.length > 0) {
				for (var l in AVC_LEVELS) {
					sl = AVC_LEVELS[l].toString(16);
					if (sl.length == 1) sl = "0"+sl;
					mimes.push({
						codec: 'avc1.'+sj+sk+sl,
						description: "AVC "+desc+" Level "+ AVC_LEVELS[l]/10
					});
				}
			}
		}
	}
	return mimes;
}