--- /dev/null
+use nihav_core::codecs::DecoderResult;
+use super::{MV, ZERO_MV};
+use nihav_core::frame::NAVideoBuffer;
+
+#[allow(clippy::many_single_char_names)]
+pub mod code;
+pub mod data;
+#[allow(clippy::needless_range_loop)]
+pub mod decoder;
+
+pub trait BlockDecoder {
+ fn decode_pichdr(&mut self) -> DecoderResult<PicInfo>;
+ fn decode_slice_header(&mut self, pinfo: &PicInfo) -> DecoderResult<SliceInfo>;
+ fn decode_block_header(&mut self, pinfo: &PicInfo, sinfo: &SliceInfo, sstate: &SliceState) -> DecoderResult<BlockInfo>;
+ fn decode_block_intra(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()>;
+ fn decode_block_inter(&mut self, info: &BlockInfo, sstate: &SliceState, quant: u8, no: usize, coded: bool, blk: &mut [i16; 64]) -> DecoderResult<()>;
+ fn is_slice_end(&mut self) -> bool;
+}
+
+pub trait BlockDSP {
+ fn idct(&self, blk: &mut [i16; 64]);
+ fn copy_blocks(&self, dst: &mut NAVideoBuffer<u8>, src: &NAVideoBuffer<u8>, xpos: usize, ypos: usize, w: usize, h: usize, mv: MV);
+ fn avg_blocks(&self, dst: &mut NAVideoBuffer<u8>, src: &NAVideoBuffer<u8>, xpos: usize, ypos: usize, w: usize, h: usize, mv: MV);
+ fn filter_row(&self, buf: &mut NAVideoBuffer<u8>, mb_y: usize, mb_w: usize, cbpi: &CBPInfo);
+}
+
+#[allow(dead_code)]
+#[derive(Debug,Clone,Copy,PartialEq)]
+pub enum Type {
+ I, P, PB, Skip, B, Special
+}
+
+impl Type {
+ pub fn is_ref(self) -> bool {
+ match self {
+ Type::I | Type::P | Type::PB => true,
+ _ => false,
+ }
+ }
+}
+
+#[allow(dead_code)]
+#[derive(Debug,Clone,Copy)]
+pub struct PBInfo {
+ trb: u8,
+ dbquant: u8,
+ improved: bool,
+}
+
+impl PBInfo {
+ pub fn new(trb: u8, dbquant: u8, improved: bool) -> Self {
+ PBInfo{ trb, dbquant, improved }
+ }
+ pub fn get_trb(self) -> u8 { self.trb }
+ pub fn get_dbquant(self) -> u8 { self.dbquant }
+ pub fn is_improved(self) -> bool { self.improved }
+}
+
+#[allow(dead_code)]
+#[derive(Debug,Clone,Copy)]
+pub struct PicInfo {
+ pub w: usize,
+ pub h: usize,
+ pub mode: Type,
+ pub mvmode: MVMode,
+ pub umv: bool,
+ pub apm: bool,
+ pub quant: u8,
+ pub pb: Option<PBInfo>,
+ pub ts: u16,
+ pub plusinfo: Option<PlusInfo>,
+}
+
+#[allow(dead_code)]
+impl PicInfo {
+ pub fn new(w: usize, h: usize, mode: Type, mvmode: MVMode, umv: bool, apm: bool, quant: u8, ts: u16, pb: Option<PBInfo>, plusinfo: Option<PlusInfo>) -> Self {
+ PicInfo {
+ w, h, mode, mvmode,
+ umv, apm, quant,
+ pb, ts, plusinfo
+ }
+ }
+ 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 is_pb(&self) -> bool { self.pb.is_some() }
+ pub fn is_ipb(&self) -> bool {
+ if let Some(ref pbi) = self.pb {
+ pbi.is_improved()
+ } else {
+ false
+ }
+ }
+ pub fn get_ts(&self) -> u16 { self.ts }
+ pub fn get_pbinfo(&self) -> PBInfo { self.pb.unwrap() }
+ pub fn get_plusifo(&self) -> Option<PlusInfo> { self.plusinfo }
+ pub fn get_mvmode(&self) -> MVMode { self.mvmode }
+}
+
+#[allow(dead_code)]
+#[derive(Debug,Clone,Copy)]
+pub struct PlusInfo {
+ pub aic: bool,
+ pub deblock: bool,
+ pub aiv_mode: bool,
+ pub mq_mode: bool,
+}
+
+impl PlusInfo {
+ pub fn new(aic: bool, deblock: bool, aiv_mode: bool, mq_mode: bool) -> Self {
+ PlusInfo { aic, deblock, aiv_mode, mq_mode }
+ }
+}
+
+#[allow(dead_code)]
+#[derive(Debug,Clone,Copy)]
+pub struct SliceInfo {
+ pub mb_x: usize,
+ pub mb_y: usize,
+ pub mb_end: usize,
+ pub quant: u8,
+}
+
+#[allow(dead_code)]
+#[derive(Debug,Clone,Copy)]
+pub struct SliceState {
+ pub is_iframe: bool,
+ pub mb_x: usize,
+ pub mb_y: usize,
+ pub first_line: bool,
+ pub first_mb: bool,
+ pub slice_mb_x: usize,
+ pub slice_mb_y: usize,
+ pub quant: u8,
+}
+
+const SLICE_NO_END: usize = 99999999;
+
+impl SliceInfo {
+ pub fn new(mb_x: usize, mb_y: usize, mb_end: usize, quant: u8) -> Self {
+ SliceInfo{ mb_x, mb_y, mb_end, quant }
+ }
+ pub fn new_gob(mb_x: usize, mb_y: usize, quant: u8) -> Self {
+ SliceInfo{ mb_x, mb_y, mb_end: SLICE_NO_END, quant }
+ }
+ pub fn get_default_slice(pinfo: &PicInfo) -> Self {
+ SliceInfo{ mb_x: 0, mb_y: 0, mb_end: SLICE_NO_END, quant: pinfo.get_quant() }
+ }
+ pub fn get_quant(&self) -> u8 { self.quant }
+ pub fn is_at_end(&self, mb_pos: usize) -> bool { self.mb_end == mb_pos }
+ pub fn needs_check(&self) -> bool { self.mb_end == SLICE_NO_END }
+}
+
+impl SliceState {
+ pub fn new(is_iframe: bool) -> Self {
+ SliceState {
+ is_iframe, mb_x: 0, mb_y: 0, first_line: true, first_mb: true,
+ slice_mb_x: 0, slice_mb_y: 0, quant: 0
+ }
+ }
+ pub fn next_mb(&mut self) {
+ self.mb_x += 1; self.first_mb = false;
+ if self.mb_x >= self.slice_mb_x && self.mb_y > self.slice_mb_y {
+ self.first_line = false;
+ }
+ }
+ pub fn new_row(&mut self) {
+ self.mb_x = 0; self.mb_y += 1;
+ if self.mb_x >= self.slice_mb_x && self.mb_y > self.slice_mb_y {
+ self.first_line = false;
+ }
+ self.first_mb = true;
+ }
+ pub fn reset_slice(&mut self, smb_x: usize, smb_y: usize) {
+ self.slice_mb_x = smb_x;
+ self.slice_mb_y = smb_y;
+ self.first_line = true;
+ self.first_mb = true;
+ }
+}
+
+#[derive(Debug,Clone,Copy)]
+pub struct BlockInfo {
+ pub intra: bool,
+ pub skip: bool,
+ pub mode: Type,
+ pub cbp: u8,
+ pub q: u8,
+ pub mv: [MV; 4],
+ pub num_mv: usize,
+ pub bpart: bool,
+ pub b_cbp: u8,
+ pub mv2: [MV; 2],
+ pub num_mv2: usize,
+ pub fwd: bool,
+ pub acpred: ACPredMode,
+}
+
+#[allow(dead_code)]
+#[derive(Debug,Clone,Copy)]
+pub struct BBlockInfo {
+ present: bool,
+ cbp: u8,
+ num_mv: usize,
+ fwd: bool,
+}
+
+#[allow(non_camel_case_types)]
+#[derive(Debug,Clone,Copy)]
+pub enum BlockMVInfo {
+ Intra,
+ Inter_1MV(MV),
+ Inter_4MV([MV; 4]),
+}
+
+#[allow(dead_code)]
+#[derive(Debug,Clone,Copy,PartialEq)]
+pub enum ACPredMode {
+ None,
+ DC,
+ Ver,
+ Hor,
+}
+
+#[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,
+ cbp,
+ 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,
+ acpred: ACPredMode::None,
+ }
+ }
+ 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.is_empty() { 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.is_empty() { 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;
+ self.num_mv2 = mvs.len();
+ }
+ pub fn is_b_fwd(&self) -> bool { self.fwd }
+ pub fn set_acpred(&mut self, acpred: ACPredMode) { self.acpred = acpred }
+ pub fn get_acpred(&self) -> ACPredMode { self.acpred }
+}
+
+impl BBlockInfo {
+ pub fn new(present: bool, cbp: u8, num_mv: usize, fwd: bool) -> Self {
+ BBlockInfo {
+ present,
+ cbp,
+ num_mv,
+ fwd,
+ }
+ }
+ pub fn get_num_mv(&self) -> usize { self.num_mv }
+}
+
+#[derive(Debug,Clone,Copy)]
+pub enum MVMode {
+ Old,
+ Long,
+ UMV,
+}
+
+pub trait H263MVTrait {
+ fn add_umv(pred_mv: MV, add: MV, mvmode: MVMode) -> MV;
+ fn scale(&self, trb: u16, trd: u16) -> MV;
+ fn b_sub(pvec: MV, fwdvec: MV, bvec: MV, trb: u16, trd: u16) -> MV;
+}
+
+impl H263MVTrait for MV {
+ fn add_umv(pred_mv: MV, add: MV, mvmode: MVMode) -> MV {
+ let mut new_mv = pred_mv + add;
+ match mvmode {
+ MVMode::Old => {
+ if new_mv.x >= 64 { new_mv.x -= 64; }
+ else if new_mv.x <= -64 { new_mv.x += 64; }
+ if new_mv.y >= 64 { new_mv.y -= 64; }
+ else if new_mv.y <= -64 { new_mv.y += 64; }
+ },
+ MVMode::Long => {
+ 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; }
+ },
+ MVMode::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; }
+ },
+ };
+ new_mv
+ }
+ fn scale(&self, trb: u16, trd: u16) -> MV {
+ if (trd == 0) || (trb == 0) {
+ ZERO_MV
+ } else {
+ MV { x: (((self.x as i32) * (trb as i32)) / (trd as i32)) as i16, y: (((self.y as i32) * (trb as i32)) / (trd as i32)) as i16 }
+ }
+ }
+ fn b_sub(pvec: MV, fwdvec: MV, bvec: MV, trb: u16, trd: u16) -> MV {
+ let bscale = (trb as i32) - (trd as i32);
+ let x = if bvec.x != 0 { fwdvec.x - pvec.x } else if trd != 0 { (bscale * (pvec.x as i32) / (trd as i32)) as i16 } else { 0 };
+ let y = if bvec.y != 0 { fwdvec.y - pvec.y } else if trd != 0 { (bscale * (pvec.y as i32) / (trd as i32)) as i16 } else { 0 };
+ MV { x, y }
+ }
+}
+
+#[allow(dead_code)]
+pub struct CBPInfo {
+ cbp: Vec<u8>,
+ q: Vec<u8>,
+ 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 },
+ }
+ }
+}
+
projects / nihav.git / blobdiff