me.rs 26.9 KB
Newer Older
1 2 3 4 5 6 7 8 9
// Copyright (c) 2017-2018, The rav1e contributors. All rights reserved
//
// This source code is subject to the terms of the BSD 2 Clause License and
// the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
// was not distributed with this source code in the LICENSE file, you can
// obtain it at www.aomedia.org/license/software. If the Alliance for Open
// Media Patent License 1.0 was not distributed with this source code in the
// PATENTS file, you can obtain it at www.aomedia.org/license/patent.

Raphaël Zumer's avatar
Raphaël Zumer committed
10 11 12 13
#[cfg(all(target_arch = "x86_64", not(windows), feature = "nasm"))]
pub use self::nasm::get_sad;
#[cfg(any(not(target_arch = "x86_64"), windows, not(feature = "nasm")))]
pub use self::native::get_sad;
Raphaël Zumer's avatar
Raphaël Zumer committed
14
use crate::context::{BlockOffset, BLOCK_TO_PLANE_SHIFT, MI_SIZE};
15
use crate::encoder::ReferenceFrame;
Raphaël Zumer's avatar
Raphaël Zumer committed
16 17 18 19
use crate::FrameInvariants;
use crate::FrameState;
use crate::partition::*;
use crate::plane::*;
20
use crate::util::Pixel;
21 22

use std::sync::Arc;
23

24 25
#[cfg(all(target_arch = "x86_64", not(windows), feature = "nasm"))]
mod nasm {
Raphaël Zumer's avatar
Raphaël Zumer committed
26 27
  use crate::plane::*;
  use crate::util::*;
28
  use std::mem;
Luca Barbato's avatar
Luca Barbato committed
29

Raphaël Zumer's avatar
Raphaël Zumer committed
30 31
  use libc;

Luca Barbato's avatar
Luca Barbato committed
32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61
  extern {
    fn rav1e_sad_4x4_hbd_ssse3(
      src: *const u16, src_stride: libc::ptrdiff_t, dst: *const u16,
      dst_stride: libc::ptrdiff_t
    ) -> u32;

    fn rav1e_sad_8x8_hbd10_ssse3(
      src: *const u16, src_stride: libc::ptrdiff_t, dst: *const u16,
      dst_stride: libc::ptrdiff_t
    ) -> u32;

    fn rav1e_sad_16x16_hbd_ssse3(
      src: *const u16, src_stride: libc::ptrdiff_t, dst: *const u16,
      dst_stride: libc::ptrdiff_t
    ) -> u32;

    fn rav1e_sad_32x32_hbd10_ssse3(
      src: *const u16, src_stride: libc::ptrdiff_t, dst: *const u16,
      dst_stride: libc::ptrdiff_t
    ) -> u32;

    fn rav1e_sad_64x64_hbd10_ssse3(
      src: *const u16, src_stride: libc::ptrdiff_t, dst: *const u16,
      dst_stride: libc::ptrdiff_t
    ) -> u32;

    fn rav1e_sad_128x128_hbd10_ssse3(
      src: *const u16, src_stride: libc::ptrdiff_t, dst: *const u16,
      dst_stride: libc::ptrdiff_t
    ) -> u32;
62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91

    fn rav1e_sad4x4_sse2(
      src: *const u8, src_stride: libc::ptrdiff_t, dst: *const u8,
      dst_stride: libc::ptrdiff_t
    ) -> u32;

    fn rav1e_sad8x8_sse2(
      src: *const u8, src_stride: libc::ptrdiff_t, dst: *const u8,
      dst_stride: libc::ptrdiff_t
    ) -> u32;

    fn rav1e_sad16x16_sse2(
      src: *const u8, src_stride: libc::ptrdiff_t, dst: *const u8,
      dst_stride: libc::ptrdiff_t
    ) -> u32;

    fn rav1e_sad32x32_sse2(
      src: *const u8, src_stride: libc::ptrdiff_t, dst: *const u8,
      dst_stride: libc::ptrdiff_t
    ) -> u32;

    fn rav1e_sad64x64_sse2(
      src: *const u8, src_stride: libc::ptrdiff_t, dst: *const u8,
      dst_stride: libc::ptrdiff_t
    ) -> u32;

    fn rav1e_sad128x128_sse2(
      src: *const u8, src_stride: libc::ptrdiff_t, dst: *const u8,
      dst_stride: libc::ptrdiff_t
    ) -> u32;
Luca Barbato's avatar
Luca Barbato committed
92
  }
Kyle Siefring's avatar
Kyle Siefring committed
93

Luca Barbato's avatar
Luca Barbato committed
94
  #[target_feature(enable = "ssse3")]
95 96
  unsafe fn sad_ssse3(
    plane_org: &PlaneSlice<'_, u16>, plane_ref: &PlaneSlice<'_, u16>, blk_h: usize,
Luca Barbato's avatar
Luca Barbato committed
97 98 99
    blk_w: usize, bit_depth: usize
  ) -> u32 {
    let mut sum = 0 as u32;
100 101
    let org_stride = (plane_org.plane.cfg.stride * 2) as libc::ptrdiff_t;
    let ref_stride = (plane_ref.plane.cfg.stride * 2) as libc::ptrdiff_t;
Luca Barbato's avatar
Luca Barbato committed
102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117
    assert!(blk_h >= 4 && blk_w >= 4);
    let step_size =
      blk_h.min(blk_w).min(if bit_depth <= 10 { 128 } else { 4 });
    let func = match step_size.ilog() {
      3 => rav1e_sad_4x4_hbd_ssse3,
      4 => rav1e_sad_8x8_hbd10_ssse3,
      5 => rav1e_sad_16x16_hbd_ssse3,
      6 => rav1e_sad_32x32_hbd10_ssse3,
      7 => rav1e_sad_64x64_hbd10_ssse3,
      8 => rav1e_sad_128x128_hbd10_ssse3,
      _ => rav1e_sad_128x128_hbd10_ssse3
    };
    for r in (0..blk_h).step_by(step_size) {
      for c in (0..blk_w).step_by(step_size) {
        let org_slice = plane_org.subslice(c, r);
        let ref_slice = plane_ref.subslice(c, r);
Romain Vimont's avatar
Romain Vimont committed
118 119
        let org_ptr = org_slice.as_ptr();
        let ref_ptr = ref_slice.as_ptr();
120 121 122
        // FIXME for now, T == u16
        let org_ptr = org_ptr as *const u16;
        let ref_ptr = ref_ptr as *const u16;
Luca Barbato's avatar
Luca Barbato committed
123 124
        sum += func(org_ptr, org_stride, ref_ptr, ref_stride);
      }
Kyle Siefring's avatar
Kyle Siefring committed
125
    }
126
    sum
Kyle Siefring's avatar
Kyle Siefring committed
127 128
  }

129
  #[target_feature(enable = "sse2")]
130 131
  unsafe fn sad_sse2(
    plane_org: &PlaneSlice<'_, u8>, plane_ref: &PlaneSlice<'_, u8>, blk_h: usize,
132 133 134 135
    blk_w: usize
  ) -> u32 {
    // FIXME unaligned blocks coming from hres/qres ME search
    let ptr_align_log2 = (plane_org.as_ptr() as usize).trailing_zeros() as usize;
136 137
    // The largest unaligned-safe function is for 8x8
    let ptr_align = 1 << ptr_align_log2.max(3);
138
    let mut sum = 0 as u32;
139 140
    let org_stride = plane_org.plane.cfg.stride as libc::ptrdiff_t;
    let ref_stride = plane_ref.plane.cfg.stride as libc::ptrdiff_t;
141
    assert!(blk_h >= 4 && blk_w >= 4);
142
    let step_size = blk_h.min(blk_w).min(ptr_align);
143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166
    let func = match step_size.ilog() {
      3 => rav1e_sad4x4_sse2,
      4 => rav1e_sad8x8_sse2,
      5 => rav1e_sad16x16_sse2,
      6 => rav1e_sad32x32_sse2,
      7 => rav1e_sad64x64_sse2,
      8 => rav1e_sad128x128_sse2,
      _ => rav1e_sad128x128_sse2
    };
    for r in (0..blk_h).step_by(step_size) {
      for c in (0..blk_w).step_by(step_size) {
        let org_slice = plane_org.subslice(c, r);
        let ref_slice = plane_ref.subslice(c, r);
        let org_ptr = org_slice.as_ptr();
        let ref_ptr = ref_slice.as_ptr();
        // FIXME for now, T == u8
        let org_ptr = org_ptr as *const u8;
        let ref_ptr = ref_ptr as *const u8;
        sum += func(org_ptr, org_stride, ref_ptr, ref_stride);
      }
    }
    sum
  }

Luca Barbato's avatar
Luca Barbato committed
167
  #[inline(always)]
168 169
  pub fn get_sad<T: Pixel>(
    plane_org: &PlaneSlice<'_, T>, plane_ref: &PlaneSlice<'_, T>, blk_h: usize,
Luca Barbato's avatar
Luca Barbato committed
170 171 172 173
    blk_w: usize, bit_depth: usize
  ) -> u32 {
    #[cfg(all(target_arch = "x86_64", not(windows), feature = "nasm"))]
    {
174
      if mem::size_of::<T>() == 2 && is_x86_feature_detected!("ssse3") && blk_h >= 4 && blk_w >= 4 {
Luca Barbato's avatar
Luca Barbato committed
175
        return unsafe {
176 177
          let plane_org = &*(plane_org as *const _ as *const PlaneSlice<'_, u16>);
          let plane_ref = &*(plane_ref as *const _ as *const PlaneSlice<'_, u16>);
Luca Barbato's avatar
Luca Barbato committed
178 179 180
          sad_ssse3(plane_org, plane_ref, blk_h, blk_w, bit_depth)
        };
      }
181 182
      if mem::size_of::<T>() == 1 && is_x86_feature_detected!("sse2") && blk_h >= 4 && blk_w >= 4 {
        return unsafe {
183 184
          let plane_org = &*(plane_org as *const _ as *const PlaneSlice<'_, u8>);
          let plane_ref = &*(plane_ref as *const _ as *const PlaneSlice<'_, u8>);
185 186 187
          sad_sse2(plane_org, plane_ref, blk_h, blk_w)
        };
      }
Kyle Siefring's avatar
Kyle Siefring committed
188
    }
Luca Barbato's avatar
Luca Barbato committed
189
    super::native::get_sad(plane_org, plane_ref, blk_h, blk_w, bit_depth)
Kyle Siefring's avatar
Kyle Siefring committed
190
  }
191 192 193
}

mod native {
Raphaël Zumer's avatar
Raphaël Zumer committed
194
  use crate::plane::*;
195
  use crate::util::*;
196

Luca Barbato's avatar
Luca Barbato committed
197
  #[inline(always)]
198 199
  pub fn get_sad<T: Pixel>(
    plane_org: &PlaneSlice<'_, T>, plane_ref: &PlaneSlice<'_, T>, blk_h: usize,
Luca Barbato's avatar
Luca Barbato committed
200 201 202
    blk_w: usize, _bit_depth: usize
  ) -> u32 {
    let mut sum = 0 as u32;
203

Luca Barbato's avatar
Luca Barbato committed
204 205
    let org_iter = plane_org.iter_width(blk_w);
    let ref_iter = plane_ref.iter_width(blk_w);
206

Luca Barbato's avatar
Luca Barbato committed
207
    for (slice_org, slice_ref) in org_iter.take(blk_h).zip(ref_iter) {
208 209 210
      sum += slice_org
        .iter()
        .zip(slice_ref)
211
        .map(|(&a, &b)| (i32::cast_from(a) - i32::cast_from(b)).abs() as u32)
212
        .sum::<u32>();
Luca Barbato's avatar
Luca Barbato committed
213
    }
214

Luca Barbato's avatar
Luca Barbato committed
215 216
    sum
  }
217 218
}

219
fn get_mv_range(
220
  w_in_b: usize, h_in_b: usize, bo: &BlockOffset, blk_w: usize, blk_h: usize
221
) -> (isize, isize, isize, isize) {
222 223 224
  let border_w = 128 + blk_w as isize * 8;
  let border_h = 128 + blk_h as isize * 8;
  let mvx_min = -(bo.x as isize) * (8 * MI_SIZE) as isize - border_w;
225
  let mvx_max = (w_in_b - bo.x - blk_w / MI_SIZE) as isize * (8 * MI_SIZE) as isize + border_w;
226
  let mvy_min = -(bo.y as isize) * (8 * MI_SIZE) as isize - border_h;
227
  let mvy_max = (h_in_b - bo.y - blk_h / MI_SIZE) as isize * (8 * MI_SIZE) as isize + border_h;
228 229 230 231

  (mvx_min, mvx_max, mvy_min, mvy_max)
}

232 233
pub fn get_subset_predictors<T: Pixel>(
  fi: &FrameInvariants<T>, bo: &BlockOffset, cmv: MotionVector,
234
  frame_mvs: &[MotionVector], frame_ref_opt: &Option<Arc<ReferenceFrame<T>>>,
235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255
  ref_slot: usize
) -> (Vec<MotionVector>) {
  let mut predictors = Vec::new();

  // EPZS subset A and B predictors.

  if bo.x > 0 {
    let left = frame_mvs[bo.y * fi.w_in_b + bo.x - 1];
    predictors.push(left);
  }
  if bo.y > 0 {
    let top = frame_mvs[(bo.y - 1) * fi.w_in_b + bo.x];
    predictors.push(top);

    if bo.x < fi.w_in_b - 1 {
      let top_right = frame_mvs[(bo.y - 1) * fi.w_in_b + bo.x + 1];
      predictors.push(top_right);
    }
  }

  if predictors.len() > 0 {
Vladimir Kazakov's avatar
Vladimir Kazakov committed
256
    let mut median_mv = MotionVector::default();
257 258 259 260 261 262 263 264
    for mv in predictors.iter() {
      median_mv = median_mv + *mv;
    }
    median_mv = median_mv / (predictors.len() as i16);

    predictors.push(median_mv.quantize_to_fullpel());
  }

Vladimir Kazakov's avatar
Vladimir Kazakov committed
265
  predictors.push(MotionVector::default());
266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298

  // Coarse motion estimation.

  predictors.push(cmv.quantize_to_fullpel());

  // EPZS subset C predictors.

  if let Some(ref frame_ref) = frame_ref_opt {
    let prev_frame_mvs = &frame_ref.frame_mvs[ref_slot];

    if bo.x > 0 {
      let left = prev_frame_mvs[bo.y * fi.w_in_b + bo.x - 1];
      predictors.push(left);
    }
    if bo.y > 0 {
      let top = prev_frame_mvs[(bo.y - 1) * fi.w_in_b + bo.x];
      predictors.push(top);
    }
    if bo.x < fi.w_in_b - 1 {
      let right = prev_frame_mvs[bo.y * fi.w_in_b + bo.x + 1];
      predictors.push(right);
    }
    if bo.y < fi.h_in_b - 1 {
      let bottom = prev_frame_mvs[(bo.y + 1) * fi.w_in_b + bo.x];
      predictors.push(bottom);
    }

    predictors.push(prev_frame_mvs[bo.y * fi.w_in_b + bo.x]);
  }

  predictors
}

299 300
pub fn motion_estimation<T: Pixel>(
  fi: &FrameInvariants<T>, fs: &FrameState<T>, bsize: BlockSize, bo: &BlockOffset,
301
  ref_frame: usize, cmv: MotionVector, pmv: [MotionVector; 2],
302
  ref_slot: usize
303
) -> MotionVector {
304
  match fi.rec_buffer.frames[fi.ref_frames[ref_frame - LAST_FRAME] as usize] {
305
    Some(ref rec) => {
306

307 308 309 310
      let po = PlaneOffset {
        x: (bo.x as isize) << BLOCK_TO_PLANE_SHIFT,
        y: (bo.y as isize) << BLOCK_TO_PLANE_SHIFT
      };
311 312
      let blk_w = bsize.width();
      let blk_h = bsize.height();
313 314 315 316 317 318
      let (mvx_min, mvx_max, mvy_min, mvy_max) = get_mv_range(fi.w_in_b, fi.h_in_b, bo, blk_w, blk_h);

      // 0.5 is a fudge factor
      let lambda = (fi.me_lambda * 256.0 * 0.5) as u32;

      // Full-pixel motion estimation
319

320
      let mut lowest_cost = std::u64::MAX;
Vladimir Kazakov's avatar
Vladimir Kazakov committed
321
      let mut best_mv = MotionVector::default();
322

323 324 325 326 327 328 329 330 331 332 333 334 335 336
      let frame_mvs = &fs.frame_mvs[ref_slot];
      let frame_ref = &fi.rec_buffer.frames[fi.ref_frames[0] as usize];

      if fi.config.speed_settings.diamond_me {
        let predictors = get_subset_predictors(fi, bo, cmv,
          frame_mvs, frame_ref, ref_slot);

        diamond_me_search(
          fi, &po,
          &fs.input.planes[0], &rec.frame.planes[0],
          &predictors, fi.sequence.bit_depth,
          pmv, lambda,
          mvx_min, mvx_max, mvy_min, mvy_max,
          blk_w, blk_h,
337 338
          &mut best_mv, &mut lowest_cost, &mut None, ref_frame
        );
339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364
      } else {
        let range = 16;
        let x_lo = po.x + ((-range + (cmv.col / 8) as isize).max(mvx_min / 8).min(mvx_max / 8));
        let x_hi = po.x + ((range + (cmv.col / 8) as isize).max(mvx_min / 8).min(mvx_max / 8));
        let y_lo = po.y + ((-range + (cmv.row / 8) as isize).max(mvy_min / 8).min(mvy_max / 8));
        let y_hi = po.y + ((range + (cmv.row / 8) as isize).max(mvy_min / 8).min(mvy_max / 8));

        full_search(
          x_lo,
          x_hi,
          y_lo,
          y_hi,
          blk_h,
          blk_w,
          &fs.input.planes[0],
          &rec.frame.planes[0],
          &mut best_mv,
          &mut lowest_cost,
          &po,
          2,
          fi.sequence.bit_depth,
          lambda,
          pmv,
          fi.allow_high_precision_mv
        );
      }
Frank Bossen's avatar
Frank Bossen committed
365

366
      // Sub-pixel motion estimation
fbossen's avatar
fbossen committed
367
      let mut tmp_plane = Plane::new(blk_w, blk_h, 0, 0, 0, 0);
Frank Bossen's avatar
Frank Bossen committed
368

369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386
      if fi.config.speed_settings.diamond_me {
        let predictors = vec![best_mv];
        diamond_me_search(
          fi, &po,
          &fs.input.planes[0], &rec.frame.planes[0],
          &predictors, fi.sequence.bit_depth,
          pmv, lambda,
          mvx_min, mvx_max, mvy_min, mvy_max,
          blk_w, blk_h,
          &mut best_mv, &mut lowest_cost, &mut Some(tmp_plane), ref_frame
        );
      } else {
        telescopic_subpel_search(
          fi, fs, bsize, &po,
          lambda, ref_frame, pmv,
          mvx_min, mvx_max, mvy_min, mvy_max,
          &mut tmp_plane, &mut best_mv, &mut lowest_cost
        );
Frank Bossen's avatar
Frank Bossen committed
387 388
      }

389
      best_mv
390
    }
391

Vladimir Kazakov's avatar
Vladimir Kazakov committed
392
    None => MotionVector::default()
393 394
  }
}
395

396 397 398
fn get_best_predictor<T: Pixel>(
  fi: &FrameInvariants<T>,
  po: &PlaneOffset, p_org: &Plane<T>, p_ref: &Plane<T>,
399
  predictors: &[MotionVector],
400
  bit_depth: usize, pmv: [MotionVector; 2], lambda: u32,
401 402
  mvx_min: isize, mvx_max: isize, mvy_min: isize, mvy_max: isize,
  blk_w: usize, blk_h: usize,
403 404
  center_mv: &mut MotionVector, center_mv_cost: &mut u64,
  tmp_plane_opt: &mut Option<Plane<T>>, ref_frame: usize) {
Vladimir Kazakov's avatar
Vladimir Kazakov committed
405
  *center_mv = MotionVector::default();
406 407 408 409 410 411
  *center_mv_cost = std::u64::MAX;

  for &init_mv in predictors.iter() {
    let cost = get_mv_rd_cost(
      fi, po, p_org, p_ref, bit_depth,
      pmv, lambda, mvx_min, mvx_max, mvy_min, mvy_max,
412
      blk_w, blk_h, init_mv, tmp_plane_opt, ref_frame);
413 414 415 416 417 418 419 420

    if cost < *center_mv_cost {
      *center_mv = init_mv;
      *center_mv_cost = cost;
    }
  }
}

421 422 423
fn diamond_me_search<T: Pixel>(
  fi: &FrameInvariants<T>,
  po: &PlaneOffset, p_org: &Plane<T>, p_ref: &Plane<T>,
424
  predictors: &[MotionVector],
425
  bit_depth: usize, pmv: [MotionVector; 2], lambda: u32,
426 427
  mvx_min: isize, mvx_max: isize, mvy_min: isize, mvy_max: isize,
  blk_w: usize, blk_h: usize,
428 429
  center_mv: &mut MotionVector, center_mv_cost: &mut u64,
  tmp_plane_opt: &mut Option<Plane<T>>, ref_frame: usize)
430 431
{
  let diamond_pattern = [(1i16, 0i16), (0, 1), (-1, 0), (0, -1)];
432 433 434 435 436 437 438 439 440
  let (mut diamond_radius, diamond_radius_end) = {
    if tmp_plane_opt.is_some() {
      // Sub-pixel motion estimation
      (4i16, if fi.allow_high_precision_mv {1i16} else {2i16})
    } else {
      // Full pixel motion estimation
      (16i16, 8i16)
    }
  };
441 442 443 444

  get_best_predictor(
    fi, po, p_org, p_ref, &predictors,
    bit_depth, pmv, lambda, mvx_min, mvx_max, mvy_min, mvy_max,
445 446
    blk_w, blk_h, center_mv, center_mv_cost,
    tmp_plane_opt, ref_frame);
447 448 449

  loop {
    let mut best_diamond_rd_cost = std::u64::MAX;
Vladimir Kazakov's avatar
Vladimir Kazakov committed
450
    let mut best_diamond_mv = MotionVector::default();
451 452 453 454 455 456 457 458 459 460 461

    for p in diamond_pattern.iter() {

        let cand_mv = MotionVector {
          row: center_mv.row + diamond_radius * p.0,
          col: center_mv.col + diamond_radius * p.1
        };

        let rd_cost = get_mv_rd_cost(
          fi, &po, p_org, p_ref, bit_depth,
          pmv, lambda, mvx_min, mvx_max, mvy_min, mvy_max,
462
          blk_w, blk_h, cand_mv, tmp_plane_opt, ref_frame);
463 464 465 466 467 468 469 470

        if rd_cost < best_diamond_rd_cost {
          best_diamond_rd_cost = rd_cost;
          best_diamond_mv = cand_mv;
        }
    }

    if *center_mv_cost <= best_diamond_rd_cost {
471
      if diamond_radius == diamond_radius_end {
472 473 474 475 476 477 478 479 480 481 482 483 484 485
        break;
      } else {
        diamond_radius /= 2;
      }
    }
    else {
      *center_mv = best_diamond_mv;
      *center_mv_cost = best_diamond_rd_cost;
    }
  }

  assert!(*center_mv_cost < std::u64::MAX);
}

486 487 488
fn get_mv_rd_cost<T: Pixel>(
  fi: &FrameInvariants<T>,
  po: &PlaneOffset, p_org: &Plane<T>, p_ref: &Plane<T>, bit_depth: usize,
489
  pmv: [MotionVector; 2], lambda: u32,
490 491
  mvx_min: isize, mvx_max: isize, mvy_min: isize, mvy_max: isize,
  blk_w: usize, blk_h: usize,
492 493
  cand_mv: MotionVector, tmp_plane_opt: &mut Option<Plane<T>>,
  ref_frame: usize) -> u64
494 495 496 497 498 499 500 501 502 503
{
  if (cand_mv.col as isize) < mvx_min || (cand_mv.col as isize) > mvx_max {
    return std::u64::MAX;
  }
  if (cand_mv.row as isize) < mvy_min || (cand_mv.row as isize) > mvy_max {
    return std::u64::MAX;
  }

  let plane_org = p_org.slice(po);

504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540
  if let Some(ref mut tmp_plane) = tmp_plane_opt {
    let mut tmp_slice = &mut tmp_plane.mut_slice(&PlaneOffset { x: 0, y: 0 });
    PredictionMode::NEWMV.predict_inter(
      fi,
      0,
      &po,
      &mut tmp_slice,
      blk_w,
      blk_h,
      [ref_frame, NONE_FRAME],
      [cand_mv, MotionVector { row: 0, col: 0 }]
    );
    let plane_ref = tmp_plane.slice(&PlaneOffset { x: 0, y: 0 });
    compute_mv_rd_cost(
      fi, pmv, lambda, bit_depth, blk_w, blk_h, cand_mv,
      &plane_org, &plane_ref
    )
  } else {
    // Full pixel motion vector
    let plane_ref = p_ref.slice(&PlaneOffset {
      x: po.x + (cand_mv.col / 8) as isize,
      y: po.y + (cand_mv.row / 8) as isize
    });
    compute_mv_rd_cost(
      fi, pmv, lambda, bit_depth, blk_w, blk_h, cand_mv,
      &plane_org, &plane_ref
    )
  }
}

fn compute_mv_rd_cost<T: Pixel>(
  fi: &FrameInvariants<T>,
  pmv: [MotionVector; 2], lambda: u32,
  bit_depth: usize, blk_w: usize, blk_h: usize, cand_mv: MotionVector,
  plane_org: &PlaneSlice<T>, plane_ref: &PlaneSlice<T>
) -> u64
{
541 542 543 544 545 546 547 548 549
  let sad = get_sad(&plane_org, &plane_ref, blk_h, blk_w, bit_depth);

  let rate1 = get_mv_rate(cand_mv, pmv[0], fi.allow_high_precision_mv);
  let rate2 = get_mv_rate(cand_mv, pmv[1], fi.allow_high_precision_mv);
  let rate = rate1.min(rate2 + 1);

  256 * sad as u64 + rate as u64 * lambda as u64
}

550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621
fn telescopic_subpel_search<T: Pixel>(
  fi: &FrameInvariants<T>, fs: &FrameState<T>, bsize: BlockSize, po: &PlaneOffset,
  lambda: u32, ref_frame: usize, pmv: [MotionVector; 2],
  mvx_min: isize, mvx_max: isize, mvy_min: isize, mvy_max: isize,
  tmp_plane: &mut Plane<T>, best_mv: &mut MotionVector, lowest_cost: &mut u64
) {
  let blk_w = bsize.width();
  let blk_h = bsize.height();

  let mode = PredictionMode::NEWMV;

  let mut steps = vec![8, 4, 2];
  if fi.allow_high_precision_mv {
    steps.push(1);
  }

  for step in steps {
    let center_mv_h = *best_mv;
    for i in 0..3 {
      for j in 0..3 {
        // Skip the center point that was already tested
        if i == 1 && j == 1 {
          continue;
        }

        let cand_mv = MotionVector {
          row: center_mv_h.row + step * (i as i16 - 1),
          col: center_mv_h.col + step * (j as i16 - 1)
        };

        if (cand_mv.col as isize) < mvx_min || (cand_mv.col as isize) > mvx_max {
          continue;
        }
        if (cand_mv.row as isize) < mvy_min || (cand_mv.row as isize) > mvy_max {
          continue;
        }

        {
          let tmp_slice =
            &mut tmp_plane.mut_slice(&PlaneOffset { x: 0, y: 0 });

          mode.predict_inter(
            fi,
            0,
            &po,
            tmp_slice,
            blk_w,
            blk_h,
            [ref_frame, NONE_FRAME],
            [cand_mv, MotionVector { row: 0, col: 0 }]
          );
        }

        let plane_org = fs.input.planes[0].slice(&po);
        let plane_ref = tmp_plane.slice(&PlaneOffset { x: 0, y: 0 });

        let sad = get_sad(&plane_org, &plane_ref, blk_h, blk_w, fi.sequence.bit_depth);

        let rate1 = get_mv_rate(cand_mv, pmv[0], fi.allow_high_precision_mv);
        let rate2 = get_mv_rate(cand_mv, pmv[1], fi.allow_high_precision_mv);
        let rate = rate1.min(rate2 + 1);
        let cost = 256 * sad as u64 + rate as u64 * lambda as u64;

        if cost < *lowest_cost {
          *lowest_cost = cost;
          *best_mv = cand_mv;
        }
      }
    }
  }
}

622
fn full_search<T: Pixel>(
Kyle Siefring's avatar
Kyle Siefring committed
623
  x_lo: isize, x_hi: isize, y_lo: isize, y_hi: isize, blk_h: usize,
624
  blk_w: usize, p_org: &Plane<T>, p_ref: &Plane<T>, best_mv: &mut MotionVector,
625
  lowest_cost: &mut u64, po: &PlaneOffset, step: usize, bit_depth: usize,
626
  lambda: u32, pmv: [MotionVector; 2], allow_high_precision_mv: bool
Kyle Siefring's avatar
Kyle Siefring committed
627
) {
Luca Barbato's avatar
Luca Barbato committed
628 629 630 631 632
    let search_range_y = (y_lo..=y_hi).step_by(step);
    let search_range_x = (x_lo..=x_hi).step_by(step);
    let search_area = search_range_y.flat_map(|y| { search_range_x.clone().map(move |x| (y, x)) });

    let (cost, mv) = search_area.map(|(y, x)| {
633 634 635
      let plane_org = p_org.slice(po);
      let plane_ref = p_ref.slice(&PlaneOffset { x, y });

Kyle Siefring's avatar
Kyle Siefring committed
636
      let sad = get_sad(&plane_org, &plane_ref, blk_h, blk_w, bit_depth);
637

Frank Bossen's avatar
Frank Bossen committed
638 639 640 641 642 643 644 645
      let mv = MotionVector {
        row: 8 * (y as i16 - po.y as i16),
        col: 8 * (x as i16 - po.x as i16)
      };

      let rate1 = get_mv_rate(mv, pmv[0], allow_high_precision_mv);
      let rate2 = get_mv_rate(mv, pmv[1], allow_high_precision_mv);
      let rate = rate1.min(rate2 + 1);
646
      let cost = 256 * sad as u64 + rate as u64 * lambda as u64;
Frank Bossen's avatar
Frank Bossen committed
647

Luca Barbato's avatar
Luca Barbato committed
648 649 650 651 652
      (cost, mv)
  }).min_by_key(|(c, _)| *c).unwrap();

    *lowest_cost = cost;
    *best_mv = mv;
653 654 655
}

// Adjust block offset such that entire block lies within frame boundaries
656
fn adjust_bo<T: Pixel>(bo: &BlockOffset, fi: &FrameInvariants<T>, blk_w: usize, blk_h: usize) -> BlockOffset {
657 658 659 660 661 662
  BlockOffset {
    x: (bo.x as isize).min(fi.w_in_b as isize - blk_w as isize / 4).max(0) as usize,
    y: (bo.y as isize).min(fi.h_in_b as isize - blk_h as isize / 4).max(0) as usize
  }
}

Frank Bossen's avatar
Frank Bossen committed
663 664 665 666 667 668 669 670 671 672 673 674 675
fn get_mv_rate(a: MotionVector, b: MotionVector, allow_high_precision_mv: bool) -> u32 {
  fn diff_to_rate(diff: i16, allow_high_precision_mv: bool) -> u32 {
    let d = if allow_high_precision_mv { diff } else { diff >> 1 };
    if d == 0 {
      0
    } else {
      2 * (16 - d.abs().leading_zeros())
    }
  }

  diff_to_rate(a.row - b.row, allow_high_precision_mv) + diff_to_rate(a.col - b.col, allow_high_precision_mv)
}

676 677
pub fn estimate_motion_ss4<T: Pixel>(
  fi: &FrameInvariants<T>, fs: &FrameState<T>, bsize: BlockSize, ref_idx: usize,
678
  bo: &BlockOffset
679 680 681 682 683 684 685 686 687
) -> Option<MotionVector> {
  if let Some(ref rec) = fi.rec_buffer.frames[ref_idx] {
    let blk_w = bsize.width();
    let blk_h = bsize.height();
    let bo_adj = adjust_bo(bo, fi, blk_w, blk_h);
    let po = PlaneOffset {
      x: (bo_adj.x as isize) << BLOCK_TO_PLANE_SHIFT >> 2,
      y: (bo_adj.y as isize) << BLOCK_TO_PLANE_SHIFT >> 2
    };
688

689 690
    let range_x = 192 * fi.me_range_scale as isize;
    let range_y = 64 * fi.me_range_scale as isize;
691
    let (mvx_min, mvx_max, mvy_min, mvy_max) = get_mv_range(fi.w_in_b, fi.h_in_b, &bo_adj, blk_w, blk_h);
692 693 694 695
    let x_lo = po.x + (((-range_x).max(mvx_min / 8)) >> 2);
    let x_hi = po.x + (((range_x).min(mvx_max / 8)) >> 2);
    let y_lo = po.y + (((-range_y).max(mvy_min / 8)) >> 2);
    let y_hi = po.y + (((range_y).min(mvy_max / 8)) >> 2);
696

697
    let mut lowest_cost = std::u64::MAX;
Vladimir Kazakov's avatar
Vladimir Kazakov committed
698
    let mut best_mv = MotionVector::default();
699

Frank Bossen's avatar
Frank Bossen committed
700
    // Divide by 16 to account for subsampling, 0.125 is a fudge factor
701
    let lambda = (fi.me_lambda * 256.0 / 16.0 * 0.125) as u32;
Frank Bossen's avatar
Frank Bossen committed
702

703
    full_search(
Kyle Siefring's avatar
Kyle Siefring committed
704 705 706 707 708 709 710 711 712
      x_lo,
      x_hi,
      y_lo,
      y_hi,
      blk_h >> 2,
      blk_w >> 2,
      &fs.input_qres,
      &rec.input_qres,
      &mut best_mv,
Frank Bossen's avatar
Frank Bossen committed
713
      &mut lowest_cost,
Kyle Siefring's avatar
Kyle Siefring committed
714 715
      &po,
      1,
716
      fi.sequence.bit_depth,
Frank Bossen's avatar
Frank Bossen committed
717
      lambda,
Vladimir Kazakov's avatar
Vladimir Kazakov committed
718
      [MotionVector::default(); 2],
Frank Bossen's avatar
Frank Bossen committed
719
      fi.allow_high_precision_mv
720 721 722 723 724 725 726 727
    );

    Some(MotionVector { row: best_mv.row * 4, col: best_mv.col * 4 })
  } else {
    None
  }
}

728 729
pub fn estimate_motion_ss2<T: Pixel>(
  fi: &FrameInvariants<T>, fs: &FrameState<T>, bsize: BlockSize, ref_idx: usize,
730
  bo: &BlockOffset, pmvs: &[Option<MotionVector>; 3]
731 732 733 734 735 736 737 738 739 740
) -> Option<MotionVector> {
  if let Some(ref rec) = fi.rec_buffer.frames[ref_idx] {
    let blk_w = bsize.width();
    let blk_h = bsize.height();
    let bo_adj = adjust_bo(bo, fi, blk_w, blk_h);
    let po = PlaneOffset {
      x: (bo_adj.x as isize) << BLOCK_TO_PLANE_SHIFT >> 1,
      y: (bo_adj.y as isize) << BLOCK_TO_PLANE_SHIFT >> 1
    };
    let range = 16;
741
    let (mvx_min, mvx_max, mvy_min, mvy_max) = get_mv_range(fi.w_in_b, fi.h_in_b, &bo_adj, blk_w, blk_h);
742

743
    let mut lowest_cost = std::u64::MAX;
Vladimir Kazakov's avatar
Vladimir Kazakov committed
744
    let mut best_mv = MotionVector::default();
745

Frank Bossen's avatar
Frank Bossen committed
746
    // Divide by 4 to account for subsampling, 0.125 is a fudge factor
747
    let lambda = (fi.me_lambda * 256.0 / 4.0 * 0.125) as u32;
Frank Bossen's avatar
Frank Bossen committed
748

749 750
    for omv in pmvs.iter() {
      if let Some(pmv) = omv {
751 752 753 754
        let x_lo = po.x + (((pmv.col as isize / 8 - range).max(mvx_min / 8).min(mvx_max / 8)) >> 1);
        let x_hi = po.x + (((pmv.col as isize / 8 + range).max(mvx_min / 8).min(mvx_max / 8)) >> 1);
        let y_lo = po.y + (((pmv.row as isize / 8 - range).max(mvy_min / 8).min(mvy_max / 8)) >> 1);
        let y_hi = po.y + (((pmv.row as isize / 8 + range).max(mvy_min / 8).min(mvy_max / 8)) >> 1);
755 756

        full_search(
Kyle Siefring's avatar
Kyle Siefring committed
757 758 759 760 761 762 763 764 765
          x_lo,
          x_hi,
          y_lo,
          y_hi,
          blk_h >> 1,
          blk_w >> 1,
          &fs.input_hres,
          &rec.input_hres,
          &mut best_mv,
Frank Bossen's avatar
Frank Bossen committed
766
          &mut lowest_cost,
Kyle Siefring's avatar
Kyle Siefring committed
767 768
          &po,
          1,
769
          fi.sequence.bit_depth,
Frank Bossen's avatar
Frank Bossen committed
770
          lambda,
Vladimir Kazakov's avatar
Vladimir Kazakov committed
771
          [MotionVector::default(); 2],
Frank Bossen's avatar
Frank Bossen committed
772
          fi.allow_high_precision_mv
773 774 775 776 777 778 779 780 781 782
        );
      }
    }

    Some(MotionVector { row: best_mv.row * 2, col: best_mv.col * 2 })
  } else {
    None
  }
}

783 784 785
#[cfg(test)]
pub mod test {
  use super::*;
Raphaël Zumer's avatar
Raphaël Zumer committed
786 787
  use crate::partition::BlockSize;
  use crate::partition::BlockSize::*;
788 789

  // Generate plane data for get_sad_same()
790
  fn setup_sad<T: Pixel>() -> (Plane<T>, Plane<T>) {
791 792
    let mut input_plane = Plane::new(640, 480, 0, 0, 128 + 8, 128 + 8);
    let mut rec_plane = input_plane.clone();
793 794
    // Make the test pattern robust to data alignment
    let xpad_off = (input_plane.cfg.xorigin - input_plane.cfg.xpad) as i32 - 8i32;
Luca Barbato's avatar
Luca Barbato committed
795

796
    for (i, row) in input_plane.data.chunks_mut(input_plane.cfg.stride).enumerate() {
797
      for (j, pixel) in row.into_iter().enumerate() {
798
        let val = (j + i) as i32 - xpad_off & 255i32;
Luca Barbato's avatar
Luca Barbato committed
799
        assert!(val >= u8::min_value().into() &&
800
            val <= u8::max_value().into());
801
        *pixel = T::cast_from(val);
802 803 804 805
      }
    }

    for (i, row) in rec_plane.data.chunks_mut(rec_plane.cfg.stride).enumerate() {
806
      for (j, pixel) in row.into_iter().enumerate() {
807
        let val = j as i32 - i as i32 - xpad_off & 255i32;
Luca Barbato's avatar
Luca Barbato committed
808
        assert!(val >= u8::min_value().into() &&
809
            val <= u8::max_value().into());
810
        *pixel = T::cast_from(val);
811 812 813 814 815 816 817
      }
    }

    (input_plane, rec_plane)
  }

  // Regression and validation test for SAD computation
818
  fn get_sad_same_inner<T: Pixel>() {
819
    let blocks: Vec<(BlockSize, u32)> = vec![
820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841
      (BLOCK_4X4, 1912),
      (BLOCK_4X8, 3496),
      (BLOCK_8X4, 4296),
      (BLOCK_8X8, 7824),
      (BLOCK_8X16, 14416),
      (BLOCK_16X8, 16592),
      (BLOCK_16X16, 31136),
      (BLOCK_16X32, 59552),
      (BLOCK_32X16, 60064),
      (BLOCK_32X32, 120128),
      (BLOCK_32X64, 250176),
      (BLOCK_64X32, 186688),
      (BLOCK_64X64, 438912),
      (BLOCK_64X128, 1016768),
      (BLOCK_128X64, 654272),
      (BLOCK_128X128, 1689792),
      (BLOCK_4X16, 6664),
      (BLOCK_16X4, 8680),
      (BLOCK_8X32, 27600),
      (BLOCK_32X8, 31056),
      (BLOCK_16X64, 116384),
      (BLOCK_64X16, 93344),
842 843
    ];

Kyle Siefring's avatar
Kyle Siefring committed
844
    let bit_depth: usize = 8;
845
    let (input_plane, rec_plane) = setup_sad::<T>();
846 847

    for block in blocks {
Kyle Siefring's avatar
Kyle Siefring committed
848 849
      let bsw = block.0.width();
      let bsh = block.0.height();
850
      let po = PlaneOffset { x: 32, y: 40 };
851

Kyle Siefring's avatar
Kyle Siefring committed
852 853
      let mut input_slice = input_plane.slice(&po);
      let mut rec_slice = rec_plane.slice(&po);
854

Kyle Siefring's avatar
Kyle Siefring committed
855 856 857 858
      assert_eq!(
        block.1,
        get_sad(&mut input_slice, &mut rec_slice, bsw, bsh, bit_depth)
      );
859 860
    }
  }
861 862 863 864 865 866 867 868 869 870

  #[test]
  fn get_sad_same_u8() {
    get_sad_same_inner::<u8>();
  }

  #[test]
  fn get_sad_same_u16() {
    get_sad_same_inner::<u16>();
  }
871
}