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use nihav_codec_support::data::GenericCache;
use super::vpcommon::*;
pub enum VPTreeDef<T: Copy> {
Index(u8),
Value(T),
}
pub trait VPTreeReader {
fn read_tree<T:Copy>(&mut self, tree_def: &[VPTreeDef<T>], tree_prob: &[u8]) -> T;
}
impl<'a> VPTreeReader for BoolCoder<'a> {
fn read_tree<T:Copy>(&mut self, tree_def: &[VPTreeDef<T>], tree_prob: &[u8]) -> T {
let mut idx = 0;
loop {
let bit = self.read_prob(tree_prob[idx >> 1]);
match tree_def[idx + (bit as usize)] {
VPTreeDef::Value(v) => return v,
VPTreeDef::Index(ix) => { idx = ix as usize; },
};
}
}
}
#[repr(u8)]
#[derive(Clone,Copy,PartialEq,Debug,Default)]
pub enum PredMode {
#[default]
DCPred,
HPred,
VPred,
TMPred,
BPred,
//sub-block prediction modes
LDPred,
RDPred,
VRPred,
VLPred,
HDPred,
HUPred,
Inter,
}
impl PredMode {
pub fn to_b_mode(self) -> Self {
if self == PredMode::DCPred {
self
} else {
PredMode::TMPred
}
}
pub fn to_b_index(self) -> usize {
match self {
PredMode::DCPred => 0,
PredMode::TMPred => 1,
PredMode::VPred => 2,
PredMode::HPred => 3,
PredMode::LDPred => 4,
PredMode::RDPred => 5,
PredMode::VRPred => 6,
PredMode::VLPred => 7,
PredMode::HDPred => 8,
PredMode::HUPred => 9,
_ => unreachable!(),
}
}
}
#[derive(Clone,Copy,PartialEq)]
pub enum DCTToken {
Zero,
One,
Two,
Three,
Four,
Cat1,
Cat2,
Cat3,
Cat4,
Cat5,
Cat6,
EOB,
}
pub fn expand_token(bc: &mut BoolCoder, token: DCTToken) -> i16 {
let cat;
match token {
DCTToken::Zero => return 0,
DCTToken::One => return if bc.read_bool() { -1 } else { 1 },
DCTToken::Two => return if bc.read_bool() { -2 } else { 2 },
DCTToken::Three => return if bc.read_bool() { -3 } else { 3 },
DCTToken::Four => return if bc.read_bool() { -4 } else { 4 },
DCTToken::Cat1 => cat = 0,
DCTToken::Cat2 => cat = 1,
DCTToken::Cat3 => cat = 2,
DCTToken::Cat4 => cat = 3,
DCTToken::Cat5 => cat = 4,
DCTToken::Cat6 => cat = 5,
_ => unreachable!(),
};
let mut add = 0i16;
let add_probs = &VP56_COEF_ADD_PROBS[cat];
for prob in add_probs.iter() {
if *prob == 128 { break; }
add = (add << 1) | (bc.read_prob(*prob) as i16);
}
let sign = bc.read_bool();
let level = VP56_COEF_BASE[cat] + add;
if !sign {
level
} else {
-level
}
}
#[derive(Clone,Copy,Debug,PartialEq)]
pub enum MVSplitMode {
TopBottom,
LeftRight,
Quarters,
Sixteenths,
}
#[derive(Clone,Copy,Debug,PartialEq)]
pub enum SubMVRef {
Left,
Above,
New,
Zero,
}
pub struct PredCache {
pub y_pred: GenericCache<u8>,
pub u_pred: GenericCache<u8>,
pub v_pred: GenericCache<u8>,
pub y2_pred: GenericCache<u8>,
pub y_pred_left: [u8; 4],
pub u_pred_left: [u8; 2],
pub v_pred_left: [u8; 2],
pub y2_pred_left: u8,
}
impl PredCache {
pub fn new() -> Self {
Self {
y_pred: GenericCache::new(1, 1, 0),
u_pred: GenericCache::new(1, 1, 0),
v_pred: GenericCache::new(1, 1, 0),
y2_pred: GenericCache::new(1, 1, 0),
y_pred_left: [0; 4],
u_pred_left: [0; 2],
v_pred_left: [0; 2],
y2_pred_left: 0,
}
}
pub fn resize(&mut self, mb_w: usize) {
self.y_pred = GenericCache::new(4, mb_w * 4 + 1, 0);
self.u_pred = GenericCache::new(2, mb_w * 2 + 1, 0);
self.v_pred = GenericCache::new(2, mb_w * 2 + 1, 0);
self.y2_pred = GenericCache::new(1, mb_w + 1, 0);
}
pub fn reset(&mut self) {
self.y_pred.reset();
self.u_pred.reset();
self.v_pred.reset();
self.y2_pred.reset();
self.y_pred_left = [0; 4];
self.u_pred_left = [0; 2];
self.v_pred_left = [0; 2];
self.y2_pred_left = 0;
}
pub fn update_row(&mut self) {
self.y_pred.update_row();
self.u_pred.update_row();
self.v_pred.update_row();
self.y2_pred.update_row();
}
pub fn reset_left(&mut self) {
self.y_pred_left = [0; 4];
self.u_pred_left = [0; 2];
self.v_pred_left = [0; 2];
self.y2_pred_left = 0;
}
}
pub const Y_MODE_TREE: &[VPTreeDef<PredMode>] = &[
VPTreeDef::Value(PredMode::DCPred), VPTreeDef::Index(2),
VPTreeDef::Index(4), VPTreeDef::Index(6),
VPTreeDef::Value(PredMode::VPred), VPTreeDef::Value(PredMode::HPred),
VPTreeDef::Value(PredMode::TMPred), VPTreeDef::Value(PredMode::BPred),
];
pub const KF_Y_MODE_TREE: &[VPTreeDef<PredMode>] = &[
VPTreeDef::Value(PredMode::BPred), VPTreeDef::Index(2),
VPTreeDef::Index(4), VPTreeDef::Index(6),
VPTreeDef::Value(PredMode::DCPred), VPTreeDef::Value(PredMode::VPred),
VPTreeDef::Value(PredMode::HPred), VPTreeDef::Value(PredMode::TMPred),
];
pub const UV_MODE_TREE: &[VPTreeDef<PredMode>] = &[
VPTreeDef::Value(PredMode::DCPred), VPTreeDef::Index(2),
VPTreeDef::Value(PredMode::VPred), VPTreeDef::Index(4),
VPTreeDef::Value(PredMode::HPred), VPTreeDef::Value(PredMode::TMPred)
];
pub const B_MODE_TREE: &[VPTreeDef<PredMode>] = &[
VPTreeDef::Value(PredMode::DCPred), VPTreeDef::Index(2),
VPTreeDef::Value(PredMode::TMPred), VPTreeDef::Index(4),
VPTreeDef::Value(PredMode::VPred), VPTreeDef::Index(6),
VPTreeDef::Index(8), VPTreeDef::Index(12),
VPTreeDef::Value(PredMode::HPred), VPTreeDef::Index(10),
VPTreeDef::Value(PredMode::RDPred), VPTreeDef::Value(PredMode::VRPred),
VPTreeDef::Value(PredMode::LDPred), VPTreeDef::Index(14),
VPTreeDef::Value(PredMode::VLPred), VPTreeDef::Index(16),
VPTreeDef::Value(PredMode::HDPred), VPTreeDef::Value(PredMode::HUPred)
];
pub const FEATURE_TREE: &[VPTreeDef<usize>] = &[
VPTreeDef::Index(2), VPTreeDef::Index(4),
VPTreeDef::Value(0), VPTreeDef::Value(1),
VPTreeDef::Value(2), VPTreeDef::Value(3)
];
pub const COEF_TREE: &[VPTreeDef<DCTToken>] = &[
VPTreeDef::Value(DCTToken::EOB), VPTreeDef::Index(2),
VPTreeDef::Value(DCTToken::Zero), VPTreeDef::Index(4),
VPTreeDef::Value(DCTToken::One), VPTreeDef::Index(6),
VPTreeDef::Index(8), VPTreeDef::Index(12),
VPTreeDef::Value(DCTToken::Two), VPTreeDef::Index(10),
VPTreeDef::Value(DCTToken::Three), VPTreeDef::Value(DCTToken::Four),
VPTreeDef::Index(14), VPTreeDef::Index(16),
VPTreeDef::Value(DCTToken::Cat1), VPTreeDef::Value(DCTToken::Cat2),
VPTreeDef::Index(18), VPTreeDef::Index(20),
VPTreeDef::Value(DCTToken::Cat3), VPTreeDef::Value(DCTToken::Cat4),
VPTreeDef::Value(DCTToken::Cat5), VPTreeDef::Value(DCTToken::Cat6)
];
pub const MV_REF_TREE: &[VPTreeDef<VPMBType>] = &[
VPTreeDef::Value(VPMBType::InterNoMV), VPTreeDef::Index(2),
VPTreeDef::Value(VPMBType::InterNearest), VPTreeDef::Index(4),
VPTreeDef::Value(VPMBType::InterNear), VPTreeDef::Index(6),
VPTreeDef::Value(VPMBType::InterMV), VPTreeDef::Value(VPMBType::InterFourMV)
];
pub const SMALL_MV_TREE: &[VPTreeDef<i16>] = &[
VPTreeDef::Index(2), VPTreeDef::Index(8),
VPTreeDef::Index(4), VPTreeDef::Index(6),
VPTreeDef::Value(0), VPTreeDef::Value(1),
VPTreeDef::Value(2), VPTreeDef::Value(3),
VPTreeDef::Index(10), VPTreeDef::Index(12),
VPTreeDef::Value(4), VPTreeDef::Value(5),
VPTreeDef::Value(6), VPTreeDef::Value(7)
];
pub const MV_SPLIT_MODE_TREE: &[VPTreeDef<MVSplitMode>] = &[
VPTreeDef::Value(MVSplitMode::Sixteenths), VPTreeDef::Index(2),
VPTreeDef::Value(MVSplitMode::Quarters), VPTreeDef::Index(4),
VPTreeDef::Value(MVSplitMode::TopBottom), VPTreeDef::Value(MVSplitMode::LeftRight)
];
pub const SUB_MV_REF_TREE: &[VPTreeDef<SubMVRef>] = &[
VPTreeDef::Value(SubMVRef::Left), VPTreeDef::Index(2),
VPTreeDef::Value(SubMVRef::Above), VPTreeDef::Index(4),
VPTreeDef::Value(SubMVRef::Zero), VPTreeDef::Value(SubMVRef::New)
];
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