libvpx: Pull from upstream

source/libvpx/vp9/common/vp9_reconinter.c

 /*
  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
 #include <assert.h>
 
 #include "./vpx_scale_rtcd.h"
 #include "./vpx_config.h"
 
 #include "vpx/vpx_integer.h"
 
 #include "vp9/common/vp9_blockd.h"
 #include "vp9/common/vp9_filter.h"
 #include "vp9/common/vp9_reconinter.h"
 #include "vp9/common/vp9_reconintra.h"
 
-static void build_mc_border(const uint8_t *src, int src_stride,
-                            uint8_t *dst, int dst_stride,
-                            int x, int y, int b_w, int b_h, int w, int h) {
-  // Get a pointer to the start of the real data for this row.
-  const uint8_t *ref_row = src - x - y * src_stride;
-
-  if (y >= h)
-    ref_row += (h - 1) * src_stride;
-  else if (y > 0)
-    ref_row += y * src_stride;
-
-  do {
-    int right = 0, copy;
-    int left = x < 0 ? -x : 0;
-
-    if (left > b_w)
-      left = b_w;
-
-    if (x + b_w > w)
-      right = x + b_w - w;
-
-    if (right > b_w)
-      right = b_w;
-
-    copy = b_w - left - right;
-
-    if (left)
-      memset(dst, ref_row[0], left);
-
-    if (copy)
-      memcpy(dst + left, ref_row + x + left, copy);
-
-    if (right)
-      memset(dst + left + copy, ref_row[w - 1], right);
-
-    dst += dst_stride;
-    ++y;
-
-    if (y > 0 && y < h)
-      ref_row += src_stride;
-  } while (--b_h);
-}
-
-#if CONFIG_VP9_HIGHBITDEPTH
-static void high_build_mc_border(const uint8_t *src8, int src_stride,
-                                 uint16_t *dst, int dst_stride,
-                                 int x, int y, int b_w, int b_h,
-                                 int w, int h) {
-  // Get a pointer to the start of the real data for this row.
-  const uint16_t *src = CONVERT_TO_SHORTPTR(src8);
-  const uint16_t *ref_row = src - x - y * src_stride;
-
-  if (y >= h)
-    ref_row += (h - 1) * src_stride;
-  else if (y > 0)
-    ref_row += y * src_stride;
-
-  do {
-    int right = 0, copy;
-    int left = x < 0 ? -x : 0;
-
-    if (left > b_w)
-      left = b_w;
-
-    if (x + b_w > w)
-      right = x + b_w - w;
-
-    if (right > b_w)
-      right = b_w;
-
-    copy = b_w - left - right;
-
-    if (left)
-      vpx_memset16(dst, ref_row[0], left);
-
-    if (copy)
-      memcpy(dst + left, ref_row + x + left, copy * sizeof(uint16_t));
-
-    if (right)
-      vpx_memset16(dst + left + copy, ref_row[w - 1], right);
-
-    dst += dst_stride;
-    ++y;
-
-    if (y > 0 && y < h)
-      ref_row += src_stride;
-  } while (--b_h);
-}
-#endif  // CONFIG_VP9_HIGHBITDEPTH
-
-static void inter_predictor(const uint8_t *src, int src_stride,
+void inter_predictor(const uint8_t *src, int src_stride,
                             uint8_t *dst, int dst_stride,
                             const int subpel_x,
                             const int subpel_y,
                             const struct scale_factors *sf,
                             int w, int h, int ref,
                             const InterpKernel *kernel,
                             int xs, int ys) {
   sf->predict[subpel_x != 0][subpel_y != 0][ref](
       src, src_stride, dst, dst_stride,
       kernel[subpel_x], xs, kernel[subpel_y], ys, w, h);
 }
 
-void vp9_build_inter_predictor(const uint8_t *src, int src_stride,
-                               uint8_t *dst, int dst_stride,
-                               const MV *src_mv,
-                               const struct scale_factors *sf,
-                               int w, int h, int ref,
-                               const InterpKernel *kernel,
-                               enum mv_precision precision,
-                               int x, int y) {
-  const int is_q4 = precision == MV_PRECISION_Q4;
-  const MV mv_q4 = { is_q4 ? src_mv->row : src_mv->row * 2,
-                     is_q4 ? src_mv->col : src_mv->col * 2 };
-  MV32 mv = vp9_scale_mv(&mv_q4, x, y, sf);
-  const int subpel_x = mv.col & SUBPEL_MASK;
-  const int subpel_y = mv.row & SUBPEL_MASK;
-
-  src += (mv.row >> SUBPEL_BITS) * src_stride + (mv.col >> SUBPEL_BITS);
-
-  inter_predictor(src, src_stride, dst, dst_stride, subpel_x, subpel_y,
-                  sf, w, h, ref, kernel, sf->x_step_q4, sf->y_step_q4);
-}
-
 #if CONFIG_VP9_HIGHBITDEPTH
-static void high_inter_predictor(const uint8_t *src, int src_stride,
+void high_inter_predictor(const uint8_t *src, int src_stride,
                                  uint8_t *dst, int dst_stride,
                                  const int subpel_x,
                                  const int subpel_y,
                                  const struct scale_factors *sf,
                                  int w, int h, int ref,
                                  const InterpKernel *kernel,
                                  int xs, int ys, int bd) {
   sf->highbd_predict[subpel_x != 0][subpel_y != 0][ref](
       src, src_stride, dst, dst_stride,
       kernel[subpel_x], xs, kernel[subpel_y], ys, w, h, bd);
@@ skipping 14 matching lines @@
   const int subpel_x = mv.col & SUBPEL_MASK;
   const int subpel_y = mv.row & SUBPEL_MASK;
 
   src += (mv.row >> SUBPEL_BITS) * src_stride + (mv.col >> SUBPEL_BITS);
 
   high_inter_predictor(src, src_stride, dst, dst_stride, subpel_x, subpel_y,
                        sf, w, h, ref, kernel, sf->x_step_q4, sf->y_step_q4, bd);
 }
 #endif  // CONFIG_VP9_HIGHBITDEPTH
 
+void vp9_build_inter_predictor(const uint8_t *src, int src_stride,
+                               uint8_t *dst, int dst_stride,
+                               const MV *src_mv,
+                               const struct scale_factors *sf,
+                               int w, int h, int ref,
+                               const InterpKernel *kernel,
+                               enum mv_precision precision,
+                               int x, int y) {
+  const int is_q4 = precision == MV_PRECISION_Q4;
+  const MV mv_q4 = { is_q4 ? src_mv->row : src_mv->row * 2,
+                     is_q4 ? src_mv->col : src_mv->col * 2 };
+  MV32 mv = vp9_scale_mv(&mv_q4, x, y, sf);
+  const int subpel_x = mv.col & SUBPEL_MASK;
+  const int subpel_y = mv.row & SUBPEL_MASK;
+
+  src += (mv.row >> SUBPEL_BITS) * src_stride + (mv.col >> SUBPEL_BITS);
+
+  inter_predictor(src, src_stride, dst, dst_stride, subpel_x, subpel_y,
+                  sf, w, h, ref, kernel, sf->x_step_q4, sf->y_step_q4);
+}
+
 static INLINE int round_mv_comp_q4(int value) {
   return (value < 0 ? value - 2 : value + 2) / 4;
 }
 
 static MV mi_mv_pred_q4(const MODE_INFO *mi, int idx) {
   MV res = { round_mv_comp_q4(mi->bmi[0].as_mv[idx].as_mv.row +
                               mi->bmi[1].as_mv[idx].as_mv.row +
                               mi->bmi[2].as_mv[idx].as_mv.row +
                               mi->bmi[3].as_mv[idx].as_mv.row),
              round_mv_comp_q4(mi->bmi[0].as_mv[idx].as_mv.col +
@@ skipping 34 matching lines @@
 
   clamp_mv(&clamped_mv,
            xd->mb_to_left_edge * (1 << (1 - ss_x)) - spel_left,
            xd->mb_to_right_edge * (1 << (1 - ss_x)) + spel_right,
            xd->mb_to_top_edge * (1 << (1 - ss_y)) - spel_top,
            xd->mb_to_bottom_edge * (1 << (1 - ss_y)) + spel_bottom);
 
   return clamped_mv;
 }
 
-static MV average_split_mvs(const struct macroblockd_plane *pd,
-                            const MODE_INFO *mi, int ref, int block) {
+MV average_split_mvs(const struct macroblockd_plane *pd,
+                     const MODE_INFO *mi, int ref, int block) {
   const int ss_idx = ((pd->subsampling_x > 0) << 1) | (pd->subsampling_y > 0);
   MV res = {0, 0};
   switch (ss_idx) {
     case 0:
       res = mi->bmi[block].as_mv[ref].as_mv;
       break;
     case 1:
       res = mi_mv_pred_q2(mi, ref, block, block + 2);
       break;
     case 2:
       res = mi_mv_pred_q2(mi, ref, block, block + 1);
       break;
     case 3:
       res = mi_mv_pred_q4(mi, ref);
       break;
     default:
       assert(ss_idx <= 3 && ss_idx >= 0);
   }
   return res;
 }
 
-static void build_inter_predictors(MACROBLOCKD *xd, int plane, int block,
+void build_inter_predictors(MACROBLOCKD *xd, int plane, int block,
                                    int bw, int bh,
                                    int x, int y, int w, int h,
                                    int mi_x, int mi_y) {
   struct macroblockd_plane *const pd = &xd->plane[plane];
   const MODE_INFO *mi = xd->mi[0].src_mi;
   const int is_compound = has_second_ref(&mi->mbmi);
   const InterpKernel *kernel = vp9_get_interp_kernel(mi->mbmi.interp_filter);
   int ref;
 
   for (ref = 0; ref < 1 + is_compound; ++ref) {
@@ skipping 87 matching lines @@
                                      BLOCK_SIZE bsize) {
   build_inter_predictors_for_planes(xd, bsize, mi_row, mi_col, 1,
                                     MAX_MB_PLANE - 1);
 }
 void vp9_build_inter_predictors_sb(MACROBLOCKD *xd, int mi_row, int mi_col,
                                    BLOCK_SIZE bsize) {
   build_inter_predictors_for_planes(xd, bsize, mi_row, mi_col, 0,
                                     MAX_MB_PLANE - 1);
 }
 
-// TODO(jingning): This function serves as a placeholder for decoder prediction
-// using on demand border extension. It should be moved to /decoder/ directory.
-static void dec_build_inter_predictors(MACROBLOCKD *xd, int plane, int block,
-                                       int bw, int bh,
-                                       int x, int y, int w, int h,
-                                       int mi_x, int mi_y) {
-  struct macroblockd_plane *const pd = &xd->plane[plane];
-  const MODE_INFO *mi = xd->mi[0].src_mi;
-  const int is_compound = has_second_ref(&mi->mbmi);
-  const InterpKernel *kernel = vp9_get_interp_kernel(mi->mbmi.interp_filter);
-  int ref;
-
-  for (ref = 0; ref < 1 + is_compound; ++ref) {
-    const struct scale_factors *const sf = &xd->block_refs[ref]->sf;
-    struct buf_2d *const pre_buf = &pd->pre[ref];
-    struct buf_2d *const dst_buf = &pd->dst;
-    uint8_t *const dst = dst_buf->buf + dst_buf->stride * y + x;
-    const MV mv = mi->mbmi.sb_type < BLOCK_8X8
-               ? average_split_mvs(pd, mi, ref, block)
-               : mi->mbmi.mv[ref].as_mv;
-
-    const MV mv_q4 = clamp_mv_to_umv_border_sb(xd, &mv, bw, bh,
-                                               pd->subsampling_x,
-                                               pd->subsampling_y);
-
-    MV32 scaled_mv;
-    int xs, ys, x0, y0, x0_16, y0_16, frame_width, frame_height, buf_stride,
-        subpel_x, subpel_y;
-    uint8_t *ref_frame, *buf_ptr;
-    const YV12_BUFFER_CONFIG *ref_buf = xd->block_refs[ref]->buf;
-    const int is_scaled = vp9_is_scaled(sf);
-
-    // Get reference frame pointer, width and height.
-    if (plane == 0) {
-      frame_width = ref_buf->y_crop_width;
-      frame_height = ref_buf->y_crop_height;
-      ref_frame = ref_buf->y_buffer;
-    } else {
-      frame_width = ref_buf->uv_crop_width;
-      frame_height = ref_buf->uv_crop_height;
-      ref_frame = plane == 1 ? ref_buf->u_buffer : ref_buf->v_buffer;
-    }
-
-    if (is_scaled) {
-      // Co-ordinate of containing block to pixel precision.
-      int x_start = (-xd->mb_to_left_edge >> (3 + pd->subsampling_x));
-      int y_start = (-xd->mb_to_top_edge >> (3 + pd->subsampling_y));
-
-      // Co-ordinate of the block to 1/16th pixel precision.
-      x0_16 = (x_start + x) << SUBPEL_BITS;
-      y0_16 = (y_start + y) << SUBPEL_BITS;
-
-      // Co-ordinate of current block in reference frame
-      // to 1/16th pixel precision.
-      x0_16 = sf->scale_value_x(x0_16, sf);
-      y0_16 = sf->scale_value_y(y0_16, sf);
-
-      // Map the top left corner of the block into the reference frame.
-      x0 = sf->scale_value_x(x_start + x, sf);
-      y0 = sf->scale_value_y(y_start + y, sf);
-
-      // Scale the MV and incorporate the sub-pixel offset of the block
-      // in the reference frame.
-      scaled_mv = vp9_scale_mv(&mv_q4, mi_x + x, mi_y + y, sf);
-      xs = sf->x_step_q4;
-      ys = sf->y_step_q4;
-    } else {
-      // Co-ordinate of containing block to pixel precision.
-      x0 = (-xd->mb_to_left_edge >> (3 + pd->subsampling_x)) + x;
-      y0 = (-xd->mb_to_top_edge >> (3 + pd->subsampling_y)) + y;
-
-      // Co-ordinate of the block to 1/16th pixel precision.
-      x0_16 = x0 << SUBPEL_BITS;
-      y0_16 = y0 << SUBPEL_BITS;
-
-      scaled_mv.row = mv_q4.row;
-      scaled_mv.col = mv_q4.col;
-      xs = ys = 16;
-    }
-    subpel_x = scaled_mv.col & SUBPEL_MASK;
-    subpel_y = scaled_mv.row & SUBPEL_MASK;
-
-    // Calculate the top left corner of the best matching block in the
-    // reference frame.
-    x0 += scaled_mv.col >> SUBPEL_BITS;
-    y0 += scaled_mv.row >> SUBPEL_BITS;
-    x0_16 += scaled_mv.col;
-    y0_16 += scaled_mv.row;
-
-    // Get reference block pointer.
-    buf_ptr = ref_frame + y0 * pre_buf->stride + x0;
-    buf_stride = pre_buf->stride;
-
-    // Do border extension if there is motion or the
-    // width/height is not a multiple of 8 pixels.
-    if (is_scaled || scaled_mv.col || scaled_mv.row ||
-        (frame_width & 0x7) || (frame_height & 0x7)) {
-      // Get reference block bottom right coordinate.
-      int x1 = ((x0_16 + (w - 1) * xs) >> SUBPEL_BITS) + 1;
-      int y1 = ((y0_16 + (h - 1) * ys) >> SUBPEL_BITS) + 1;
-      int x_pad = 0, y_pad = 0;
-
-      if (subpel_x || (sf->x_step_q4 != SUBPEL_SHIFTS)) {
-        x0 -= VP9_INTERP_EXTEND - 1;
-        x1 += VP9_INTERP_EXTEND;
-        x_pad = 1;
-      }
-
-      if (subpel_y || (sf->y_step_q4 != SUBPEL_SHIFTS)) {
-        y0 -= VP9_INTERP_EXTEND - 1;
-        y1 += VP9_INTERP_EXTEND;
-        y_pad = 1;
-      }
-
-      // Skip border extension if block is inside the frame.
-      if (x0 < 0 || x0 > frame_width - 1 || x1 < 0 || x1 > frame_width - 1 ||
-          y0 < 0 || y0 > frame_height - 1 || y1 < 0 || y1 > frame_height - 1) {
-        uint8_t *buf_ptr1 = ref_frame + y0 * pre_buf->stride + x0;
-        // Extend the border.
-#if CONFIG_VP9_HIGHBITDEPTH
-        if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
-          high_build_mc_border(buf_ptr1,
-                               pre_buf->stride,
-                               xd->mc_buf_high,
-                               x1 - x0 + 1,
-                               x0,
-                               y0,
-                               x1 - x0 + 1,
-                               y1 - y0 + 1,
-                               frame_width,
-                               frame_height);
-          buf_stride = x1 - x0 + 1;
-          buf_ptr = CONVERT_TO_BYTEPTR(xd->mc_buf_high) +
-              y_pad * 3 * buf_stride + x_pad * 3;
-        } else {
-          build_mc_border(buf_ptr1,
-                          pre_buf->stride,
-                          xd->mc_buf,
-                          x1 - x0 + 1,
-                          x0,
-                          y0,
-                          x1 - x0 + 1,
-                          y1 - y0 + 1,
-                          frame_width,
-                          frame_height);
-          buf_stride = x1 - x0 + 1;
-          buf_ptr = xd->mc_buf + y_pad * 3 * buf_stride + x_pad * 3;
-        }
-#else
-        build_mc_border(buf_ptr1,
-                        pre_buf->stride,
-                        xd->mc_buf,
-                        x1 - x0 + 1,
-                        x0,
-                        y0,
-                        x1 - x0 + 1,
-                        y1 - y0 + 1,
-                        frame_width,
-                        frame_height);
-        buf_stride = x1 - x0 + 1;
-        buf_ptr = xd->mc_buf + y_pad * 3 * buf_stride + x_pad * 3;
-#endif  // CONFIG_VP9_HIGHBITDEPTH
-      }
-    }
-
-#if CONFIG_VP9_HIGHBITDEPTH
-    if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
-      high_inter_predictor(buf_ptr, buf_stride, dst, dst_buf->stride, subpel_x,
-                           subpel_y, sf, w, h, ref, kernel, xs, ys, xd->bd);
-    } else {
-      inter_predictor(buf_ptr, buf_stride, dst, dst_buf->stride, subpel_x,
-                    subpel_y, sf, w, h, ref, kernel, xs, ys);
-    }
-#else
-    inter_predictor(buf_ptr, buf_stride, dst, dst_buf->stride, subpel_x,
-                    subpel_y, sf, w, h, ref, kernel, xs, ys);
-#endif  // CONFIG_VP9_HIGHBITDEPTH
-  }
-}
-
-void vp9_dec_build_inter_predictors_sb(MACROBLOCKD *xd, int mi_row, int mi_col,
-                                       BLOCK_SIZE bsize) {
-  int plane;
-  const int mi_x = mi_col * MI_SIZE;
-  const int mi_y = mi_row * MI_SIZE;
-  for (plane = 0; plane < MAX_MB_PLANE; ++plane) {
-    const BLOCK_SIZE plane_bsize = get_plane_block_size(bsize,
-                                                        &xd->plane[plane]);
-    const int num_4x4_w = num_4x4_blocks_wide_lookup[plane_bsize];
-    const int num_4x4_h = num_4x4_blocks_high_lookup[plane_bsize];
-    const int bw = 4 * num_4x4_w;
-    const int bh = 4 * num_4x4_h;
-
-    if (xd->mi[0].src_mi->mbmi.sb_type < BLOCK_8X8) {
-      int i = 0, x, y;
-      assert(bsize == BLOCK_8X8);
-      for (y = 0; y < num_4x4_h; ++y)
-        for (x = 0; x < num_4x4_w; ++x)
-          dec_build_inter_predictors(xd, plane, i++, bw, bh,
-                                     4 * x, 4 * y, 4, 4, mi_x, mi_y);
-    } else {
-      dec_build_inter_predictors(xd, plane, 0, bw, bh,
-                                 0, 0, bw, bh, mi_x, mi_y);
-    }
-  }
-}
-
 void vp9_setup_dst_planes(struct macroblockd_plane planes[MAX_MB_PLANE],
                           const YV12_BUFFER_CONFIG *src,
                           int mi_row, int mi_col) {
   uint8_t *const buffers[4] = {src->y_buffer, src->u_buffer, src->v_buffer,
                                src->alpha_buffer};
   const int strides[4] = {src->y_stride, src->uv_stride, src->uv_stride,
                           src->alpha_stride};
   int i;
 
   for (i = 0; i < MAX_MB_PLANE; ++i) {
@@ skipping 14 matching lines @@
     const int strides[4] = {src->y_stride, src->uv_stride, src->uv_stride,
                             src->alpha_stride};
 
     for (i = 0; i < MAX_MB_PLANE; ++i) {
       struct macroblockd_plane *const pd = &xd->plane[i];
       setup_pred_plane(&pd->pre[idx], buffers[i], strides[i], mi_row, mi_col,
                        sf, pd->subsampling_x, pd->subsampling_y);
     }
   }
 }