nihav-duck/src/codecs/vp7enc/frame_coder.rs

   1 use nihav_core::codecs::*;
   2 use nihav_codec_support::codecs::ZERO_MV;
   3 use super::super::vp78::PredMode;
   4 use super::super::vp78dsp::*;
   5 use super::super::vp7data::HIGH_EDGE_VAR_THR;
   6 use super::super::vp7dsp::*;
   7 use super::blocks::*;
   8 use super::coder::*;
   9 use super::mb_coding::*;
  10 use super::models::*;
  11 use super::motion_est::*;
  12 use super::rdo::*;
  13
  14 const MBT_Q_OFFSET: usize = 3;
  15
  16 pub struct LoopParams {
  17     pub loop_sharpness:     u8,
  18     pub loop_filter_level:  u8,
  19     pub lf_simple:          bool,
  20 }
  21
  22 pub struct FrameEncoder {
  23     mb_w:               usize,
  24     mb_h:               usize,
  25     pub loop_params:    LoopParams,
  26
  27     sblocks:            Vec<SrcBlock>,
  28     res:                Vec<Residue>,
  29     mbtypes:            Vec<MBType>,
  30     recon:              Vec<SrcBlock>,
  31     features:           Vec<u8>,
  32     has_features:       bool,
  33
  34     pctx:               PredContext,
  35
  36     me_mode:            MVSearchMode,
  37     me_range:           i16,
  38     mc_buf1:            NAVideoBufferRef<u8>,
  39     mc_buf2:            NAVideoBufferRef<u8>,
  40     mv_search_last:     Box<dyn MVSearch + Send>,
  41     mv_search_gold:     Box<dyn MVSearch + Send>,
  42 }
  43
  44 impl FrameEncoder {
  45     pub fn new(mc_buf1: NAVideoBufferRef<u8>, mc_buf2: NAVideoBufferRef<u8>) -> Self {
  46         let me_mode = MVSearchMode::default();
  47
  48         Self {
  49             mb_w:       0,
  50             mb_h:       0,
  51
  52             sblocks:    Vec::new(),
  53             res:        Vec::new(),
  54             mbtypes:    Vec::new(),
  55             recon:      Vec::new(),
  56             features:   Vec::new(),
  57             has_features:   false,
  58
  59             pctx:       PredContext::new(),
  60
  61             loop_params: LoopParams {
  62                     loop_filter_level:  0,
  63                     loop_sharpness:     0,
  64                     lf_simple:          true,
  65                 },
  66             me_mode,
  67             me_range:   0,
  68             mv_search_last: me_mode.create_search(),
  69             mv_search_gold: me_mode.create_search(),
  70             mc_buf1, mc_buf2,
  71         }
  72     }
  73     pub fn resize(&mut self, mb_w: usize, mb_h: usize) {
  74         self.mb_w = mb_w;
  75         self.mb_h = mb_h;
  76
  77         self.pctx.resize(mb_w, mb_h);
  78
  79         self.sblocks.clear();
  80         self.sblocks.reserve(mb_w * mb_h);
  81         self.res.clear();
  82         self.res.reserve(mb_w * mb_h);
  83         self.mbtypes.clear();
  84         self.mbtypes.reserve(mb_w * mb_h);
  85         self.recon.clear();
  86         self.recon.reserve(mb_w * mb_h);
  87         self.features.clear();
  88         self.features.reserve(mb_w * mb_h);
  89     }
  90     pub fn set_me_params(&mut self, me_mode: MVSearchMode, me_range: i16, version: u8) {
  91         self.me_range = me_range;
  92         if self.me_mode != me_mode {
  93             self.me_mode = me_mode;
  94             self.mv_search_last = me_mode.create_search();
  95             self.mv_search_gold = me_mode.create_search();
  96         }
  97         self.pctx.version = version;
  98     }
  99     pub fn load_frame(&mut self, vbuf: &NAVideoBuffer<u8>) {
 100         load_blocks(vbuf, &mut self.sblocks);
 101     }
 102
 103     pub fn mb_tree_search(&mut self, ref_frm: NAVideoBufferRef<u8>, mb_map: &[usize], new_mb_map: &mut [usize], mb_weights: &mut [usize]) {
 104         let mut mv_est = MVEstimator::new(ref_frm, self.mc_buf1.clone(), self.me_range);
 105         self.mv_search_last.preinit(&mv_est);
 106         let mut mb_idx = 0;
 107         new_mb_map.copy_from_slice(mb_map);
 108         for (mb_y, mb_row) in self.sblocks.chunks(self.mb_w).enumerate() {
 109             for (mb_x, blk) in mb_row.iter().enumerate() {
 110                 let (mv, _) = self.mv_search_last.search_mb(&mut mv_est, blk, mb_x, mb_y);
 111
 112                 if mv != ZERO_MV {
 113                     let new_x = ((((mb_x as isize) * 64 + (mv.x as isize) + 32) >> 6).max(0) as usize).min(self.mb_w - 1);
 114                     let new_y = ((((mb_y as isize) * 64 + (mv.y as isize) + 32) >> 6).max(0) as usize).min(self.mb_h - 1);
 115                     let nidx = new_x + new_y * self.mb_w;
 116                     new_mb_map[mb_idx] = mb_map[nidx];
 117                 }
 118                 mb_weights[new_mb_map[mb_idx]] += 1;
 119                 mb_idx += 1;
 120             }
 121         }
 122     }
 123
 124     pub fn intra_blocks(&mut self, base_q: usize, metric: &RateDistMetric, models: &VP7Models, mbt_map: Option<&[usize]>) {
 125         self.mbtypes.clear();
 126         self.pctx.reset();
 127         self.pctx.reset_intra();
 128         self.res.clear();
 129         self.recon.clear();
 130         self.features.clear();
 131
 132         self.has_features = false;
 133         if base_q > MBT_Q_OFFSET {
 134             if let Some(map) = mbt_map {
 135                 let sum: usize = map.iter().sum();
 136                 let size = map.len();
 137                 let avg = (sum + size / 2) / size;
 138                 for &val in map.iter() {
 139                     if val > avg {
 140                         self.features.push(1);
 141                         self.has_features = true;
 142                     } else {
 143                         self.features.push(0);
 144                     }
 145                 }
 146             } else {
 147                 for _ in 0..(self.mb_w * self.mb_h) {
 148                     self.features.push(0);
 149                 }
 150             }
 151         } else {
 152             for _ in 0..(self.mb_w * self.mb_h) {
 153                 self.features.push(0);
 154             }
 155         }
 156
 157         let mut imctx = IntraModePredCtx {
 158                 metric,
 159                 models,
 160                 tr:         [0; 4],
 161                 q:          base_q,
 162                 ipred_y:    IPredContext::default(),
 163                 ipred_u:    IPredContext::default(),
 164                 ipred_v:    IPredContext::default(),
 165                 pctx:       BlockPCtx::default(),
 166             };
 167
 168         for (mb_y, mb_row) in self.sblocks.chunks_mut(self.mb_w).enumerate() {
 169             imctx.ipred_y.has_top = mb_y != 0;
 170             imctx.ipred_u.has_top = mb_y != 0;
 171             imctx.ipred_v.has_top = mb_y != 0;
 172
 173             for (mb_x, sblk) in mb_row.iter().enumerate() {
 174                 self.pctx.fill_ipred(0, mb_x, &mut imctx.ipred_y);
 175                 self.pctx.fill_ipred(1, mb_x, &mut imctx.ipred_u);
 176                 self.pctx.fill_ipred(2, mb_x, &mut imctx.ipred_v);
 177                 self.pctx.fill_pctx(mb_x, &mut imctx.pctx);
 178                 if self.has_features {
 179                     imctx.q = if self.features[mb_x + mb_y * self.mb_w] != 0 {
 180                             base_q - MBT_Q_OFFSET
 181                         } else {
 182                             base_q
 183                         };
 184                 }
 185
 186                 let mut res = Residue::new();
 187                 let mut newblk = SrcBlock::default();
 188
 189                 imctx.tr = self.pctx.get_ipred_tr(mb_x);
 190                 let mut mb_type = select_intra_mode(sblk, &mut newblk, &mut res, &imctx, MAX_DIST, MBType::InterNoMV(false, [0;4]));
 191
 192                 let use_i4 = match mb_type {
 193                         MBType::Intra(best_ymode, best_cmode) => {
 194                             sblk.apply_ipred_luma(best_ymode, &imctx.ipred_y, &mut res);
 195                             newblk.fill_ipred_luma(best_ymode, &imctx.ipred_y);
 196                             sblk.apply_ipred_chroma(best_cmode, &imctx.ipred_u, &imctx.ipred_v, &mut res);
 197                             newblk.fill_ipred_chroma(best_cmode, &imctx.ipred_u, &imctx.ipred_v);
 198                             res.fdct();
 199                             res.fdct_dc_block();
 200
 201                             self.pctx.ymodes.set_mode(mb_x, best_ymode);
 202
 203                             false
 204                         },
 205                         MBType::Intra4x4(ref i4_modes, ref mut i4ctx, best_cmode) => {
 206                             sblk.apply_ipred_chroma(best_cmode, &imctx.ipred_u, &imctx.ipred_v, &mut res);
 207                             newblk.fill_ipred_chroma(best_cmode, &imctx.ipred_u, &imctx.ipred_v);
 208                             res.fdct();
 209
 210                             self.pctx.ymodes.set_modes4x4(mb_x, i4_modes, i4ctx);
 211
 212                             true
 213                         },
 214                         _ => unreachable!(),
 215                 };
 216
 217                 res.quant(imctx.q);
 218                 self.pctx.set_nz(mb_x, &res);
 219                 let mut recon = res.clone();
 220                 self.res.push(res);
 221                 self.mbtypes.push(mb_type);
 222
 223                 if !use_i4 {
 224                     recon.add_residue(&mut newblk);
 225                 } else {
 226                     recon.add_residue_chroma(&mut newblk);
 227                 }
 228
 229                 self.pctx.update_mb(&newblk, mb_x);
 230                 self.recon.push(newblk);
 231             }
 232             self.pctx.update_mb_row();
 233         }
 234     }
 235     pub fn inter_blocks(&mut self, q: usize, metric: &RateDistMetric, models: &VP7Models, last_frame: &NABufferType, gold_frame: &NABufferType) {
 236         self.has_features = false;
 237
 238         let mut mv_est_last = MVEstimator::new(last_frame.get_vbuf().unwrap(), self.mc_buf1.clone(), self.me_range);
 239         self.mv_search_last.preinit(&mv_est_last);
 240         let mut mv_est_gold = if let Some(gbuf) = gold_frame.get_vbuf() {
 241                 let mv_est = MVEstimator::new(gbuf, self.mc_buf2.clone(), self.me_range);
 242                 self.mv_search_gold.preinit(&mv_est);
 243                 Some(mv_est)
 244             } else {
 245                 None
 246             };
 247
 248         self.mbtypes.clear();
 249         self.pctx.reset();
 250         self.pctx.save_dc_pred();
 251         self.res.clear();
 252         self.recon.clear();
 253         self.features.clear();
 254
 255         let mut imctx = IntraModePredCtx {
 256                 metric,
 257                 models,
 258                 tr:         [0; 4],
 259                 q,
 260                 ipred_y:    IPredContext::default(),
 261                 ipred_u:    IPredContext::default(),
 262                 ipred_v:    IPredContext::default(),
 263                 pctx:       BlockPCtx::default(),
 264             };
 265
 266         for (mb_y, mb_row) in self.sblocks.chunks_mut(self.mb_w).enumerate() {
 267             imctx.ipred_y.has_top = mb_y != 0;
 268             imctx.ipred_u.has_top = mb_y != 0;
 269             imctx.ipred_v.has_top = mb_y != 0;
 270
 271             for (mb_x, sblk) in mb_row.iter().enumerate() {
 272                 self.pctx.fill_ipred(0, mb_x, &mut imctx.ipred_y);
 273                 self.pctx.fill_ipred(1, mb_x, &mut imctx.ipred_u);
 274                 self.pctx.fill_ipred(2, mb_x, &mut imctx.ipred_v);
 275                 self.pctx.fill_pctx(mb_x, &mut imctx.pctx);
 276
 277                 let mut res = Residue::new();
 278                 let mut newblk = SrcBlock::default();
 279
 280                 let (mvprobs, nearest_mv, near_mv, pred_mv) = self.pctx.find_mv_pred(mb_x, mb_y);
 281
 282                 let (mv, _dist) = self.mv_search_last.search_mb(&mut mv_est_last, sblk, mb_x, mb_y);
 283
 284                 mv_est_last.get_mb(&mut newblk, mb_x, mb_y, mv);
 285                 let mv_nits_dist = metric.calc_metric(0, inter_mv_nits(mv, &mvprobs, nearest_mv, near_mv, pred_mv, models));
 286                 let last_dist = calc_inter_mb_dist(sblk, &newblk, &mut res, &imctx, self.pctx.get_y2_dc_pred(true)) + mv_nits_dist;
 287
 288                 let (gmv, gold_dist) = if last_dist > SMALL_DIST {
 289                         if let Some(ref mut mv_est) = &mut mv_est_gold {
 290                             let (gmv, _gdist) = self.mv_search_gold.search_mb(mv_est, sblk, mb_x, mb_y);
 291                             mv_est.get_mb(&mut newblk, mb_x, mb_y, gmv);
 292                             let mv_nits_dist = metric.calc_metric(0, inter_mv_nits(gmv, &mvprobs, nearest_mv, near_mv, pred_mv, models));
 293                             let gdist = calc_inter_mb_dist(sblk, &newblk, &mut res, &imctx, self.pctx.get_y2_dc_pred(false)) + mv_nits_dist;
 294                             (gmv, gdist)
 295                         } else {
 296                             (ZERO_MV, MAX_DIST)
 297                         }
 298                     } else {
 299                         (ZERO_MV, MAX_DIST)
 300                     };
 301
 302                 let (last, mut inter_dist, mv, mv_est) = if last_dist < gold_dist {
 303                         (true, last_dist, mv, &mut mv_est_last)
 304                     } else if let Some (ref mut mv_est) = &mut mv_est_gold {
 305                         (false, gold_dist, gmv, mv_est)
 306                     } else {
 307                         unreachable!()
 308                     };
 309
 310                 let mut mb_type = if mv == ZERO_MV {
 311                         MBType::InterNoMV(last, mvprobs)
 312                     } else if mv == nearest_mv {
 313                         MBType::InterNearest(last, mvprobs)
 314                     } else if mv == near_mv {
 315                         MBType::InterNear(last, mvprobs)
 316                     } else {
 317                         MBType::InterMV(last, mvprobs, mv - pred_mv)
 318                     };
 319                 if inter_dist > SMALL_DIST {
 320                     if let MBType::InterMV(_, _, _) = mb_type { // xxx: maybe do it for all types?
 321                         let mv_search = if last { &mut self.mv_search_last } else { &mut self.mv_search_gold };
 322                         if let Some((mbt, dist)) = try_inter_split(sblk, &mut newblk, &mut res, mvprobs, nearest_mv, near_mv, pred_mv, last, mb_x, mb_y, mv_search, mv_est, &mut self.pctx, &imctx, inter_dist) {
 323                             mb_type = mbt;
 324                             inter_dist = dist;
 325                         }
 326                     }
 327                 }
 328
 329                 if inter_dist > SMALL_DIST {
 330                     imctx.tr = self.pctx.get_ipred_tr(mb_x);
 331                     mb_type = select_intra_mode(sblk, &mut newblk, &mut res, &imctx, inter_dist, mb_type);
 332                 }
 333
 334                 self.mbtypes.push(mb_type);
 335                 res.reset();
 336                 match mb_type {
 337                     MBType::Intra(ymode, cmode) => {
 338                         newblk.fill_ipred_luma(ymode, &imctx.ipred_y);
 339                         newblk.fill_ipred_chroma(cmode, &imctx.ipred_u, &imctx.ipred_v);
 340                         self.pctx.ymodes.set_mode(mb_x, ymode);
 341                         self.pctx.fill_mv(mb_x, mb_y, ZERO_MV);
 342                     },
 343                     MBType::Intra4x4(ref i4_modes, ref mut i4ctx, cmode) => {
 344                         newblk.fill_ipred_chroma(cmode, &imctx.ipred_u, &imctx.ipred_v);
 345                         self.pctx.ymodes.set_modes4x4(mb_x, i4_modes, i4ctx);
 346                         self.pctx.fill_mv(mb_x, mb_y, ZERO_MV);
 347                     },
 348                     MBType::InterNoMV(_, _) |
 349                     MBType::InterNearest(_, _) |
 350                     MBType::InterNear(_, _) |
 351                     MBType::InterMV(_, _, _) => {
 352                         mv_est.get_mb(&mut newblk, mb_x, mb_y, mv);
 353                         self.pctx.fill_mv(mb_x, mb_y, mv);
 354                         self.pctx.ymodes.set_mode(mb_x, PredMode::Inter);
 355                     },
 356                     MBType::InterSplitMV(_, _, _, _, _) => {
 357                         self.pctx.ymodes.set_mode(mb_x, PredMode::Inter);
 358                         recon_split_mb(&mut newblk, mb_x, mb_y, &self.pctx.mvs, self.pctx.mv_stride, mv_est);
 359                     },
 360                 };
 361                 if let MBType::Intra4x4(_, _, _) = mb_type {
 362                     res.set_chroma_from_diff(&sblk.chroma, &newblk.chroma);
 363                     res.fdct();
 364                 } else {
 365                     res.set_luma_from_diff(&sblk.luma, &newblk.luma);
 366                     res.set_chroma_from_diff(&sblk.chroma, &newblk.chroma);
 367                     res.fdct();
 368                     res.fdct_dc_block();
 369                     if !mb_type.is_intra() {
 370                         requant_y2_dc(&mut res.dcs[0], q);
 371                         self.pctx.predict_y2_dc(&mut res.dcs[0], last);
 372                     }
 373                 }
 374
 375                 res.quant(q);
 376                 self.pctx.set_nz(mb_x, &res);
 377                 let mut recon = res.clone();
 378                 self.res.push(res);
 379                 self.features.push(0);
 380                 if let MBType::Intra4x4(_, _, _) = mb_type {
 381                     recon.add_residue_chroma(&mut newblk);
 382                 } else {
 383                     recon.add_residue(&mut newblk);
 384                 }
 385                 self.pctx.update_mb(&newblk, mb_x);
 386                 self.recon.push(newblk);
 387             }
 388             self.pctx.update_mb_row();
 389         }
 390     }
 391     pub fn encode_features(&self, bc: &mut BoolEncoder, q: usize, models: &VP7Models) -> EncoderResult<()> {
 392         if self.has_features {
 393             // first feature - quantiser
 394             bc.put_bool(true, 128)?;
 395             bc.put_byte(models.feature_present[0])?;
 396             for &prob in models.feature_tree_probs[0].iter() {
 397                 bc.put_bool(prob != 255, 128)?;
 398                 if prob != 255 {
 399                     bc.put_byte(prob)?;
 400                 }
 401             }
 402             bc.put_bool(true, 128)?;
 403             bc.put_bits((q - MBT_Q_OFFSET) as u32, 7)?;
 404             for _ in 1..4 {
 405                 bc.put_bool(false, 128)?; // other quants
 406             }
 407
 408             // other features (
 409             for _ in 1..4 {
 410                 bc.put_bool(false, 128)?;
 411             }
 412         } else {
 413             for _ in 0..4 {
 414                 bc.put_bool(false, 128)?;
 415             }
 416         }
 417         Ok(())
 418     }
 419     pub fn encode_mb_types(&self, bc: &mut BoolEncoder, is_intra: bool, models: &VP7Models) -> EncoderResult<()> {
 420         for (mb_type, &feature) in self.mbtypes.iter().zip(self.features.iter()) {
 421             if self.has_features {
 422                 bc.encode_feature(0, if feature == 0 { None } else { Some(0) }, models)?;
 423             }
 424             bc.encode_mb_type(is_intra, mb_type, models)?;
 425         }
 426         Ok(())
 427     }
 428     pub fn encode_residues(&mut self, bc: &mut BoolEncoder, models: &VP7Models) -> EncoderResult<()> {
 429         self.pctx.reset();
 430         //self.pctx.restore_dc_pred();
 431         for (_mb_y, mb_row) in self.res.chunks(self.mb_w).enumerate() {
 432             for (mb_x, blk) in mb_row.iter().enumerate() {
 433                 if blk.has_dc {
 434                     let pctx = (self.pctx.nz_y2_left as u8) + (self.pctx.nz_y2_top[mb_x] as u8);
 435                     bc.encode_subblock(&blk.dcs, 1, pctx, models)?;
 436                     let has_nz = blk.dcs.has_nz();
 437                     self.pctx.nz_y2_left = has_nz;
 438                     self.pctx.nz_y2_top[mb_x] = has_nz;
 439                 }
 440                 let ytype = if blk.has_dc { 0 } else { 3 };
 441                 for (y, blk_row) in blk.luma.chunks(4).enumerate() {
 442                     for (x, blk) in blk_row.iter().enumerate() {
 443                         let pctx = (self.pctx.nz_y_left[y] as u8) + (self.pctx.nz_y_top[mb_x * 4 + x] as u8);
 444                         bc.encode_subblock(blk, ytype, pctx, models)?;
 445                         let has_nz = blk.has_nz();
 446                         self.pctx.nz_y_left[y] = has_nz;
 447                         self.pctx.nz_y_top[mb_x * 4 + x] = has_nz;
 448                     }
 449                 }
 450
 451                 for (c, chroma) in blk.chroma.iter().enumerate() {
 452                     for (y, blk_row) in chroma.chunks(2).enumerate() {
 453                         for (x, blk) in blk_row.iter().enumerate() {
 454                             let pctx = (self.pctx.nz_c_left[c][y] as u8) + (self.pctx.nz_c_top[c][mb_x * 2 + x] as u8);
 455                             bc.encode_subblock(blk, 2, pctx, models)?;
 456                             let has_nz = blk.has_nz();
 457                             self.pctx.nz_c_left[c][y] = has_nz;
 458                             self.pctx.nz_c_top[c][mb_x * 2 + x] = has_nz;
 459                         }
 460                     }
 461                 }
 462             }
 463             self.pctx.update_mb_row();
 464         }
 465         Ok(())
 466     }
 467     pub fn generate_models(&mut self, is_intra: bool, stats: &mut VP7ModelsStat) {
 468         stats.reset();
 469         let est = Estimator::new();
 470         self.pctx.reset();
 471         if self.has_features {
 472             for &feat in self.features.iter() {
 473                 est.estimate_feature(0, if feat == 0 { None } else { Some(0) }, stats);
 474             }
 475         }
 476         for (mbt_row, mb_row) in self.mbtypes.chunks(self.mb_w).zip(self.res.chunks(self.mb_w)) {
 477             for (mb_x, (mbtype, blk)) in mbt_row.iter().zip(mb_row.iter()).enumerate() {
 478                 est.estimate_mb_type(is_intra, mbtype, stats);
 479                 if blk.has_dc {
 480                     let pctx = (self.pctx.nz_y2_left as u8) + (self.pctx.nz_y2_top[mb_x] as u8);
 481                     est.estimate_subblock(&blk.dcs, 1, pctx, stats);
 482                     let has_nz = blk.dcs.has_nz();
 483                     self.pctx.nz_y2_left = has_nz;
 484                     self.pctx.nz_y2_top[mb_x] = has_nz;
 485                 }
 486                 let ytype = if blk.has_dc { 0 } else { 3 };
 487                 for (y, blk_row) in blk.luma.chunks(4).enumerate() {
 488                     for (x, blk) in blk_row.iter().enumerate() {
 489                         let pctx = (self.pctx.nz_y_left[y] as u8) + (self.pctx.nz_y_top[mb_x * 4 + x] as u8);
 490                         est.estimate_subblock(blk, ytype, pctx, stats);
 491                         let has_nz = blk.has_nz();
 492                         self.pctx.nz_y_left[y] = has_nz;
 493                         self.pctx.nz_y_top[mb_x * 4 + x] = has_nz;
 494                     }
 495                 }
 496
 497                 for (c, chroma) in blk.chroma.iter().enumerate() {
 498                     for (y, blk_row) in chroma.chunks(2).enumerate() {
 499                         for (x, blk) in blk_row.iter().enumerate() {
 500                             let pctx = (self.pctx.nz_c_left[c][y] as u8) + (self.pctx.nz_c_top[c][mb_x * 2 + x] as u8);
 501                             est.estimate_subblock(blk, 2, pctx, stats);
 502                             let has_nz = blk.has_nz();
 503                             self.pctx.nz_c_left[c][y] = has_nz;
 504                             self.pctx.nz_c_top[c][mb_x * 2 + x] = has_nz;
 505                         }
 506                     }
 507                 }
 508             }
 509             self.pctx.update_mb_row();
 510         }
 511     }
 512     pub fn reconstruct_frame(&mut self, frm: &mut NASimpleVideoFrame<u8>, is_intra: bool) {
 513         let mut yidx = frm.offset[0];
 514         let mut uidx = frm.offset[1];
 515         let mut vidx = frm.offset[2];
 516         let ystride = frm.stride[0];
 517         let ustride = frm.stride[1];
 518         let vstride = frm.stride[2];
 519
 520         for (mb_y, (f_row, mb_row)) in self.features.chunks(self.mb_w).zip(self.recon.chunks(self.mb_w)).enumerate() {
 521             for (mb_x, (&feature, sblk)) in f_row.iter().zip(mb_row.iter()).enumerate() {
 522                 let dst = &mut frm.data[yidx + mb_x * 16..];
 523                 for (dst, src) in dst.chunks_mut(ystride).zip(sblk.luma.chunks(16)) {
 524                     dst[..16].copy_from_slice(src);
 525                 }
 526                 let dst = &mut frm.data[uidx + mb_x * 8..];
 527                 for (dst, src) in dst.chunks_mut(ustride).zip(sblk.chroma[0].chunks(8)) {
 528                     dst[..8].copy_from_slice(src);
 529                 }
 530                 let dst = &mut frm.data[vidx + mb_x * 8..];
 531                 for (dst, src) in dst.chunks_mut(vstride).zip(sblk.chroma[1].chunks(8)) {
 532                     dst[..8].copy_from_slice(src);
 533                 }
 534
 535                 let loop_str = if feature != 2 {
 536                         self.loop_params.loop_filter_level
 537                     } else { 0 }; //todo
 538                 loop_filter_mb(frm, mb_x, mb_y, loop_str, &self.loop_params, is_intra);
 539             }
 540             yidx += ystride * 16;
 541             uidx += ustride * 8;
 542             vidx += vstride * 8;
 543         }
 544     }
 545 }
 546
 547 fn loop_filter_mb(dframe: &mut NASimpleVideoFrame<u8>, mb_x: usize, mb_y: usize, loop_str: u8, loop_params: &LoopParams, is_intra: bool) {
 548     let edge_thr    = i16::from(loop_str) + 2;
 549     let luma_thr    = i16::from(loop_str);
 550     let chroma_thr  = i16::from(loop_str) * 2;
 551     let inner_thr   = if loop_params.loop_sharpness == 0 {
 552             i16::from(loop_str)
 553         } else {
 554             let bound1 = i16::from(9 - loop_params.loop_sharpness);
 555             let shift = (loop_params.loop_sharpness + 3) >> 2;
 556             (i16::from(loop_str) >> shift).min(bound1)
 557         };
 558     let hev_thr     = i16::from(HIGH_EDGE_VAR_THR[if is_intra { 1 } else { 0 }][loop_str as usize]);
 559
 560     let ystride = dframe.stride[0];
 561     let ustride = dframe.stride[1];
 562     let vstride = dframe.stride[2];
 563     let ypos = dframe.offset[0] + mb_x * 16 + mb_y * 16 * ystride;
 564     let upos = dframe.offset[1] + mb_x *  8 + mb_y *  8 * ustride;
 565     let vpos = dframe.offset[2] + mb_x *  8 + mb_y *  8 * vstride;
 566
 567     let (loop_edge, loop_inner) = if loop_params.lf_simple {
 568             (simple_loop_filter as LoopFilterFunc, simple_loop_filter as LoopFilterFunc)
 569         } else {
 570             (normal_loop_filter_edge as LoopFilterFunc, normal_loop_filter_inner as LoopFilterFunc)
 571         };
 572
 573     if mb_x > 0 {
 574         loop_edge(dframe.data, ypos, 1, ystride, 16, edge_thr, inner_thr, hev_thr);
 575         loop_edge(dframe.data, upos, 1, ustride,  8, edge_thr, inner_thr, hev_thr);
 576         loop_edge(dframe.data, vpos, 1, vstride,  8, edge_thr, inner_thr, hev_thr);
 577     }
 578     if mb_y > 0 {
 579         loop_edge(dframe.data, ypos, ystride, 1, 16, edge_thr, inner_thr, hev_thr);
 580         loop_edge(dframe.data, upos, ustride, 1,  8, edge_thr, inner_thr, hev_thr);
 581         loop_edge(dframe.data, vpos, vstride, 1,  8, edge_thr, inner_thr, hev_thr);
 582     }
 583
 584     for y in 1..4 {
 585         loop_inner(dframe.data, ypos + y * 4 * ystride, ystride, 1, 16, luma_thr, inner_thr, hev_thr);
 586     }
 587     loop_inner(dframe.data, upos + 4 * ustride, ustride, 1, 8, chroma_thr, inner_thr, hev_thr);
 588     loop_inner(dframe.data, vpos + 4 * vstride, vstride, 1, 8, chroma_thr, inner_thr, hev_thr);
 589
 590     for x in 1..4 {
 591         loop_inner(dframe.data, ypos + x * 4, 1, ystride, 16, luma_thr, inner_thr, hev_thr);
 592     }
 593     loop_inner(dframe.data, upos + 4, 1, ustride, 8, chroma_thr, inner_thr, hev_thr);
 594     loop_inner(dframe.data, vpos + 4, 1, vstride, 8, chroma_thr, inner_thr, hev_thr);
 595 }