X-Git-Url: https://git.nihav.org/?a=blobdiff_plain;f=src%2Fcodecs%2Fh263%2Fmod.rs;fp=src%2Fcodecs%2Fh263%2Fmod.rs;h=90170e3cf6a440011fa35c752df0b4bdcb66cb38;hb=88c58b1b958a5478dca6595e2efc3a1a6b5f7e19;hp=0000000000000000000000000000000000000000;hpb=f2f1afb2cec901bf936d742c208aca2322955cc2;p=nihav.git diff --git a/src/codecs/h263/mod.rs b/src/codecs/h263/mod.rs new file mode 100644 index 0000000..90170e3 --- /dev/null +++ b/src/codecs/h263/mod.rs @@ -0,0 +1,311 @@ +use std::fmt; +use std::ops::{Add, Sub}; +use super::DecoderResult; +use frame::NAVideoBuffer; + +pub mod code; +pub mod data; +pub mod decoder; + +#[cfg(feature="decoder_intel263")] +pub mod intel263; + +pub trait BlockDecoder { + fn decode_pichdr(&mut self) -> DecoderResult; + fn decode_slice_header(&mut self, pinfo: &PicInfo) -> DecoderResult; + fn decode_block_header(&mut self, pinfo: &PicInfo, sinfo: &Slice) -> DecoderResult; + fn decode_block_intra(&mut self, info: &BlockInfo, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()>; + fn decode_block_inter(&mut self, info: &BlockInfo, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()>; + fn is_slice_end(&mut self) -> bool; + + fn filter_row(&mut self, buf: &mut NAVideoBuffer, mb_y: usize, mb_w: usize, cbpi: &CBPInfo); +} + +#[derive(Debug,Clone,Copy,PartialEq)] +pub enum Type { + I, P, Skip, Special +} + +#[allow(dead_code)] +#[derive(Debug,Clone,Copy)] +pub struct PBInfo { + trb: u8, + dbquant: u8, +} + +impl PBInfo { + pub fn new(trb: u8, dbquant: u8) -> Self { + PBInfo{ trb: trb, dbquant: dbquant } + } + pub fn get_trb(&self) -> u8 { self.trb } + pub fn get_dbquant(&self) -> u8 { self.dbquant } +} + +#[allow(dead_code)] +#[derive(Debug,Clone,Copy)] +pub struct PicInfo { + w: usize, + h: usize, + mode: Type, + quant: u8, + apm: bool, + umv: bool, + pb: Option, + ts: u8, + deblock: bool, +} + +#[allow(dead_code)] +impl PicInfo { + pub fn new(w: usize, h: usize, mode: Type, quant: u8, apm: bool, umv: bool, ts: u8, pb: Option, deblock: bool) -> Self { + PicInfo{ w: w, h: h, mode: mode, quant: quant, apm: apm, umv: umv, ts: ts, pb: pb, deblock: deblock } + } + pub fn get_width(&self) -> usize { self.w } + pub fn get_height(&self) -> usize { self.h } + pub fn get_mode(&self) -> Type { self.mode } + pub fn get_quant(&self) -> u8 { self.quant } + pub fn get_apm(&self) -> bool { self.apm } + pub fn get_umv(&self) -> bool { self.umv } + pub fn is_pb(&self) -> bool { self.pb.is_some() } + pub fn get_ts(&self) -> u8 { self.ts } + pub fn get_pbinfo(&self) -> PBInfo { self.pb.unwrap() } +} + +#[derive(Debug,Clone,Copy)] +pub struct Slice { + mb_x: usize, + mb_y: usize, + quant: u8, +} + +impl Slice { + pub fn new(mb_x: usize, mb_y: usize, quant: u8) -> Self { + Slice{ mb_x: mb_x, mb_y: mb_y, quant: quant } + } + pub fn get_default_slice(pinfo: &PicInfo) -> Self { + Slice{ mb_x: 0, mb_y: 0, quant: pinfo.get_quant() } + } + pub fn get_quant(&self) -> u8 { self.quant } +} + +#[derive(Debug,Clone,Copy)] +pub struct BlockInfo { + intra: bool, + skip: bool, + mode: Type, + cbp: u8, + q: u8, + mv: [MV; 4], + num_mv: usize, + bpart: bool, + b_cbp: u8, + mv2: [MV; 2], + num_mv2: usize, + fwd: bool, +} + +#[allow(dead_code)] +#[derive(Debug,Clone,Copy)] +pub struct BBlockInfo { + present: bool, + cbp: u8, + num_mv: usize, + fwd: bool, +} + +#[allow(dead_code)] +impl BlockInfo { + pub fn new(mode: Type, cbp: u8, q: u8) -> Self { + BlockInfo { + intra: mode == Type::I, + skip: (cbp == 0) && (mode != Type::I), + mode: mode, + cbp: cbp, + q: q, + mv: [MV::new(0, 0), MV::new(0, 0), MV::new(0, 0), MV::new(0, 0)], + num_mv: 0, + bpart: false, + b_cbp: 0, + mv2: [ZERO_MV, ZERO_MV], + num_mv2: 0, + fwd: false, + } + } + pub fn is_intra(&self) -> bool { self.intra } + pub fn is_skipped(&self) -> bool { self.skip } + pub fn get_mode(&self) -> Type { self.mode } + pub fn get_cbp(&self) -> u8 { self.cbp } + pub fn get_q(&self) -> u8 { self.q } + pub fn get_num_mvs(&self) -> usize { self.num_mv } + pub fn get_mv(&self, idx: usize) -> MV { self.mv[idx] } + pub fn has_b_part(&self) -> bool { self.bpart } + pub fn get_cbp_b(&self) -> u8 { self.b_cbp } + pub fn get_num_mvs2(&self) -> usize { self.num_mv2 } + pub fn get_mv2(&self, idx: usize) -> MV { self.mv2[idx] } + pub fn set_mv(&mut self, mvs: &[MV]) { + if mvs.len() > 0 { self.skip = false; } + let mut mv_arr: [MV; 4] = [MV::new(0, 0), MV::new(0, 0), MV::new(0, 0), MV::new(0, 0)]; + for i in 0..mvs.len() { mv_arr[i] = mvs[i]; } + self.mv = mv_arr; + self.num_mv = mvs.len(); + } + pub fn set_bpart(&mut self, bbinfo: BBlockInfo) { + self.bpart = bbinfo.present; + self.b_cbp = bbinfo.cbp; + self.fwd = bbinfo.fwd; + self.num_mv2 = bbinfo.get_num_mv(); + } + pub fn set_b_mv(&mut self, mvs: &[MV]) { + if mvs.len() > 0 { self.skip = false; } + let mut mv_arr: [MV; 2] = [ZERO_MV, ZERO_MV]; + for i in 0..mvs.len() { mv_arr[i] = mvs[i]; } + self.mv2 = mv_arr; + } + pub fn is_b_fwd(&self) -> bool { self.fwd } +} + +impl BBlockInfo { + pub fn new(present: bool, cbp: u8, num_mv: usize, fwd: bool) -> Self { + BBlockInfo { + present: present, + cbp: cbp, + num_mv: num_mv, + fwd: fwd, + } + } + pub fn get_num_mv(&self) -> usize { self.num_mv } +} + +#[derive(Debug,Clone,Copy)] +pub struct MV { + x: i16, + y: i16, +} + +impl MV { + pub fn new(x: i16, y: i16) -> Self { MV{ x: x, y: y } } + pub fn pred(a: MV, b: MV, c: MV) -> Self { + let x; + if a.x < b.x { + if b.x < c.x { + x = b.x; + } else { + if a.x < c.x { x = c.x; } else { x = a.x; } + } + } else { + if b.x < c.x { + if a.x < c.x { x = a.x; } else { x = c.x; } + } else { + x = b.x; + } + } + let y; + if a.y < b.y { + if b.y < c.y { + y = b.y; + } else { + if a.y < c.y { y = c.y; } else { y = a.y; } + } + } else { + if b.y < c.y { + if a.y < c.y { y = a.y; } else { y = c.y; } + } else { + y = b.y; + } + } + MV { x: x, y: y } + } + fn add_umv(pred_mv: MV, add: MV, umv: bool) -> Self { + let mut new_mv = pred_mv + add; + if umv { + if pred_mv.x > 32 && new_mv.x > 63 { new_mv.x -= 64; } + if pred_mv.x < -31 && new_mv.x < -63 { new_mv.x += 64; } + if pred_mv.y > 32 && new_mv.y > 63 { new_mv.y -= 64; } + if pred_mv.y < -31 && new_mv.y < -63 { new_mv.y += 64; } + } else { + if new_mv.x > 31 { new_mv.x -= 64; } + else if new_mv.x < -32 { new_mv.x += 64; } + if new_mv.y > 31 { new_mv.y -= 64; } + else if new_mv.y < -32 { new_mv.y += 64; } + } + new_mv + } + fn scale(&self, trb: u8, trd: u8) -> Self { + if (trd == 0) || (trb == 0) { + ZERO_MV + } else { + MV { x: (self.x * (trb as i16)) / (trd as i16), y: (self.y * (trb as i16)) / (trd as i16) } + } + } + fn b_sub(pvec: MV, fwdvec: MV, bvec: MV, trb: u8, trd: u8) -> Self { + let bscale = (trb as i16) - (trd as i16); + let x = if bvec.x != 0 { fwdvec.x - pvec.x } else if trd != 0 { bscale * pvec.x / (trd as i16) } else { 0 }; + let y = if bvec.y != 0 { fwdvec.y - pvec.y } else if trd != 0 { bscale * pvec.y / (trd as i16) } else { 0 }; + MV { x: x, y: y } + } +} + +pub const ZERO_MV: MV = MV { x: 0, y: 0 }; + +impl Add for MV { + type Output = MV; + fn add(self, other: MV) -> MV { MV { x: self.x + other.x, y: self.y + other.y } } +} + +impl Sub for MV { + type Output = MV; + fn sub(self, other: MV) -> MV { MV { x: self.x - other.x, y: self.y - other.y } } +} + +impl fmt::Display for MV { + fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { + write!(f, "{},{}", self.x, self.y) + } +} + +#[allow(dead_code)] +pub struct CBPInfo { + cbp: Vec, + q: Vec, + mb_w: usize, +} + +impl CBPInfo { + fn new() -> Self { CBPInfo{ cbp: Vec::new(), q: Vec::new(), mb_w: 0 } } + fn reset(&mut self, mb_w: usize) { + self.mb_w = mb_w; + self.cbp.truncate(0); + self.cbp.resize(self.mb_w * 2, 0); + self.q.truncate(0); + self.q.resize(self.mb_w * 2, 0); + } + fn update_row(&mut self) { + for i in 0..self.mb_w { + self.cbp[i] = self.cbp[self.mb_w + i]; + self.q[i] = self.q[self.mb_w + i]; + } + } + fn set_cbp(&mut self, mb_x: usize, cbp: u8) { + self.cbp[self.mb_w + mb_x] = cbp; + } + fn set_q(&mut self, mb_x: usize, q: u8) { + self.q[self.mb_w + mb_x] = q; + } + pub fn get_q(&self, mb_x: usize) -> u8 { self.q[mb_x] } + pub fn is_coded(&self, mb_x: usize, blk_no: usize) -> bool { + (self.cbp[self.mb_w + mb_x] & (1 << (5 - blk_no))) != 0 + } + pub fn is_coded_top(&self, mb_x: usize, blk_no: usize) -> bool { + let cbp = self.cbp[self.mb_w + mb_x]; + let cbp_top = self.cbp[mb_x]; + match blk_no { + 0 => { (cbp_top & 0b001000) != 0 }, + 1 => { (cbp_top & 0b000100) != 0 }, + 2 => { (cbp & 0b100000) != 0 }, + 3 => { (cbp & 0b010000) != 0 }, + 4 => { (cbp_top & 0b000010) != 0 }, + _ => { (cbp_top & 0b000001) != 0 }, + } + } +} +