data NALFrame {
	const byte T_UNKNOWN = 0
	const byte T_HEADER_SPS = 1
	const byte T_HEADER_PPS = 2
	const byte T_HEADER_SEI = 3
	const byte T_FRAME_I = 4
	const byte T_FRAME_P = 5
	const byte T_FRAME_B = 6
	byte type
	int startOffset
	int endOffset
}

data SPSHeader {
	int width
	int height
	int profile
	int level
	bool crop
	int cropL
	int cropR
	int cropT
	int cropB
}

interface H264Parser {

	NALFrame getNextFrame(byte content[], int offset)
	SPSHeader parseSPS(byte content[], int offset)

}