pub const H263_SCALES: &[u8] = &[
0, 1, 2, 3, 4, 5, 6, 6, 7, 8, 9, 9, 10, 10, 11, 11, 12, 12, 12, 13, 13, 13, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15 ];
+#[allow(dead_code)]
+pub const H263_DC_SCALES: &[u8] = &[
+ 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62 ];
+
pub const H263_ZIGZAG: &[usize] = &[
0, 1, 8, 16, 9, 2, 3, 10,
17, 24, 32, 25, 18, 11, 4, 5,
( 2, 12)
];
+pub const H263_MBTYPE_B: &[(u8, u8)] = &[
+ (1, 1), (3, 3), (1, 5), (4, 4), (5, 4), (6, 6), (2, 4), (3, 4),
+ (7, 6), (4, 6), (5, 6), (1, 6), (1, 7), (1, 8), (1, 10)
+];
+
+// 0x1 - direct, 0x2 - has quant, 0x4 - has CBP, 0x8 - has dquant, 0x10 - has fwd, 0x20 - has bwd, 0x40 - intra
+
+pub const H263_MBB_CAP_CODED: u8 = 0x2;
+pub const H263_MBB_CAP_DQUANT: u8 = 0x4;
+pub const H263_MBB_CAP_FORWARD: u8 = 0x10;
+pub const H263_MBB_CAP_BACKWARD: u8 = 0x20;
+pub const H263_MBB_CAP_INTRA: u8 = 0x80;
+
+pub const H263_MBTYPE_B_CAPS: &[u8] = &[
+ 0x00, 0x02, 0x06, // skipped, direct, direct+dq
+ 0x10, 0x12, 0x16, // forward, coded forward, forward+dq
+ 0x20, 0x22, 0x26, // backward, coded backward, backward+dq
+ 0x30, 0x32, 0x36, // bidir, coded bidir, bidir+dq
+ 0x82, 0x86 // intra, intra+dq
+];
+
+pub const H263_CBPC_B: &[(u8, u8)] = &[
+ (0, 1), (2, 2), (7, 3), (6, 3)
+];
+
pub const H263_DQUANT_TAB: &[i8] = &[-1, -2, 1, 2];
pub struct H263ShortCodeReader { tab: &'static [(u8, u8)] }