ref: 38dd0448cd3898740a1eb429de7c3dacbe59c292
parent: 587bd3669e07181147f7881af27b701c62d4e111
author: James Zern <jzern@google.com>
date: Wed Jun 10 11:44:21 EDT 2015
vp9_decodeframe: reorder some functions removes the need for a prototype for the static function dec_build_inter_predictors_sb Change-Id: I36580ceae061d27f341ab0a16ece479f92e98004
--- a/vp9/decoder/vp9_decodeframe.c
+++ b/vp9/decoder/vp9_decodeframe.c
@@ -346,6 +346,357 @@
*args->eobtotal += eob;
}
+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
+
+#if CONFIG_VP9_HIGHBITDEPTH
+static void extend_and_predict(const uint8_t *buf_ptr1, int pre_buf_stride,
+ int x0, int y0, int b_w, int b_h,
+ int frame_width, int frame_height,
+ int border_offset,
+ uint8_t *const dst, int dst_buf_stride,
+ int subpel_x, int subpel_y,
+ const InterpKernel *kernel,
+ const struct scale_factors *sf,
+ MACROBLOCKD *xd,
+ int w, int h, int ref, int xs, int ys) {+ DECLARE_ALIGNED(16, uint16_t, mc_buf_high[80 * 2 * 80 * 2]);
+ const uint8_t *buf_ptr;
+
+ if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {+ high_build_mc_border(buf_ptr1, pre_buf_stride, mc_buf_high, b_w,
+ x0, y0, b_w, b_h, frame_width, frame_height);
+ buf_ptr = CONVERT_TO_BYTEPTR(mc_buf_high) + border_offset;
+ } else {+ build_mc_border(buf_ptr1, pre_buf_stride, (uint8_t *)mc_buf_high, b_w,
+ x0, y0, b_w, b_h, frame_width, frame_height);
+ buf_ptr = ((uint8_t *)mc_buf_high) + border_offset;
+ }
+
+ if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {+ high_inter_predictor(buf_ptr, b_w, dst, dst_buf_stride, subpel_x,
+ subpel_y, sf, w, h, ref, kernel, xs, ys, xd->bd);
+ } else {+ inter_predictor(buf_ptr, b_w, dst, dst_buf_stride, subpel_x,
+ subpel_y, sf, w, h, ref, kernel, xs, ys);
+ }
+}
+#else
+static void extend_and_predict(const uint8_t *buf_ptr1, int pre_buf_stride,
+ int x0, int y0, int b_w, int b_h,
+ int frame_width, int frame_height,
+ int border_offset,
+ uint8_t *const dst, int dst_buf_stride,
+ int subpel_x, int subpel_y,
+ const InterpKernel *kernel,
+ const struct scale_factors *sf,
+ int w, int h, int ref, int xs, int ys) {+ DECLARE_ALIGNED(16, uint8_t, mc_buf[80 * 2 * 80 * 2]);
+ const uint8_t *buf_ptr;
+
+ build_mc_border(buf_ptr1, pre_buf_stride, mc_buf, b_w,
+ x0, y0, b_w, b_h, frame_width, frame_height);
+ buf_ptr = mc_buf + border_offset;
+
+ inter_predictor(buf_ptr, b_w, dst, dst_buf_stride, subpel_x,
+ subpel_y, sf, w, h, ref, kernel, xs, ys);
+}
+#endif // CONFIG_VP9_HIGHBITDEPTH
+
+static void dec_build_inter_predictors(VP9Decoder *const pbi, MACROBLOCKD *xd,
+ int plane, int bw, int bh, int x,
+ int y, int w, int h, int mi_x, int mi_y,
+ const InterpKernel *kernel,
+ const struct scale_factors *sf,
+ struct buf_2d *pre_buf,
+ struct buf_2d *dst_buf, const MV* mv,
+ RefCntBuffer *ref_frame_buf,
+ int is_scaled, int ref) {+ struct macroblockd_plane *const pd = &xd->plane[plane];
+ uint8_t *const dst = dst_buf->buf + dst_buf->stride * y + x;
+ 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;
+
+ // Get reference frame pointer, width and height.
+ if (plane == 0) {+ frame_width = ref_frame_buf->buf.y_crop_width;
+ frame_height = ref_frame_buf->buf.y_crop_height;
+ ref_frame = ref_frame_buf->buf.y_buffer;
+ } else {+ frame_width = ref_frame_buf->buf.uv_crop_width;
+ frame_height = ref_frame_buf->buf.uv_crop_height;
+ ref_frame = plane == 1 ? ref_frame_buf->buf.u_buffer
+ : ref_frame_buf->buf.v_buffer;
+ }
+
+ if (is_scaled) {+ const MV mv_q4 = clamp_mv_to_umv_border_sb(xd, mv, bw, bh,
+ pd->subsampling_x,
+ pd->subsampling_y);
+ // 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->row * (1 << (1 - pd->subsampling_y));
+ scaled_mv.col = mv->col * (1 << (1 - pd->subsampling_x));
+ 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)) {+ int y1 = (y0_16 + (h - 1) * ys) >> SUBPEL_BITS;
+
+ // Get reference block bottom right horizontal coordinate.
+ int x1 = (x0_16 + (w - 1) * xs) >> SUBPEL_BITS;
+ 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;
+ }
+
+ // Wait until reference block is ready. Pad 7 more pixels as last 7
+ // pixels of each superblock row can be changed by next superblock row.
+ if (pbi->frame_parallel_decode)
+ vp9_frameworker_wait(pbi->frame_worker_owner, ref_frame_buf,
+ MAX(0, (y1 + 7)) << (plane == 0 ? 0 : 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) {+ // Extend the border.
+ const uint8_t *const buf_ptr1 = ref_frame + y0 * buf_stride + x0;
+ const int b_w = x1 - x0 + 1;
+ const int b_h = y1 - y0 + 1;
+ const int border_offset = y_pad * 3 * b_w + x_pad * 3;
+
+ extend_and_predict(buf_ptr1, buf_stride, x0, y0, b_w, b_h,
+ frame_width, frame_height, border_offset,
+ dst, dst_buf->stride,
+ subpel_x, subpel_y,
+ kernel, sf,
+#if CONFIG_VP9_HIGHBITDEPTH
+ xd,
+#endif
+ w, h, ref, xs, ys);
+ return;
+ }
+ } else {+ // Wait until reference block is ready. Pad 7 more pixels as last 7
+ // pixels of each superblock row can be changed by next superblock row.
+ if (pbi->frame_parallel_decode) {+ const int y1 = (y0_16 + (h - 1) * ys) >> SUBPEL_BITS;
+ vp9_frameworker_wait(pbi->frame_worker_owner, ref_frame_buf,
+ MAX(0, (y1 + 7)) << (plane == 0 ? 0 : 1));
+ }
+ }
+#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
+}
+
+static void dec_build_inter_predictors_sb(VP9Decoder *const pbi,
+ 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;
+ const MODE_INFO *mi = xd->mi[0];
+ const InterpKernel *kernel = vp9_get_interp_kernel(mi->mbmi.interp_filter);
+ const BLOCK_SIZE sb_type = mi->mbmi.sb_type;
+ const int is_compound = has_second_ref(&mi->mbmi);
+
+ for (plane = 0; plane < MAX_MB_PLANE; ++plane) {+ const BLOCK_SIZE plane_bsize = get_plane_block_size(bsize,
+ &xd->plane[plane]);
+ struct macroblockd_plane *const pd = &xd->plane[plane];
+ struct buf_2d *const dst_buf = &pd->dst;
+ 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;
+ 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];
+ const int idx = xd->block_refs[ref]->idx;
+ BufferPool *const pool = pbi->common.buffer_pool;
+ RefCntBuffer *const ref_frame_buf = &pool->frame_bufs[idx];
+ const int is_scaled = vp9_is_scaled(sf);
+
+ if (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) {+ const MV mv = average_split_mvs(pd, mi, ref, i++);
+ dec_build_inter_predictors(pbi, xd, plane, bw, bh,
+ 4 * x, 4 * y, 4, 4, mi_x, mi_y, kernel,
+ sf, pre_buf, dst_buf, &mv,
+ ref_frame_buf, is_scaled, ref);
+ }
+ }
+ } else {+ const MV mv = mi->mbmi.mv[ref].as_mv;
+ dec_build_inter_predictors(pbi, xd, plane, bw, bh,
+ 0, 0, bw, bh, mi_x, mi_y, kernel,
+ sf, pre_buf, dst_buf, &mv, ref_frame_buf,
+ is_scaled, ref);
+ }
+ }
+ }
+}
+
static MB_MODE_INFO *set_offsets(VP9_COMMON *const cm, MACROBLOCKD *const xd,
const TileInfo *const tile,
BLOCK_SIZE bsize, int mi_row, int mi_col) {@@ -374,12 +725,6 @@
return &xd->mi[0]->mbmi;
}
-// TODO(jzern): relocate this function to avoid the static prototype.
-static void dec_build_inter_predictors_sb(VP9Decoder *const pbi,
- MACROBLOCKD *xd,
- int mi_row, int mi_col,
- BLOCK_SIZE bsize);
-
static void decode_block(VP9Decoder *const pbi, MACROBLOCKD *const xd,
const TileInfo *const tile,
int mi_row, int mi_col,
@@ -1730,355 +2075,4 @@
// Non frame parallel update frame context here.
if (cm->refresh_frame_context && !context_updated)
cm->frame_contexts[cm->frame_context_idx] = *cm->fc;
-}
-
-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
-
-#if CONFIG_VP9_HIGHBITDEPTH
-static void extend_and_predict(const uint8_t *buf_ptr1, int pre_buf_stride,
- int x0, int y0, int b_w, int b_h,
- int frame_width, int frame_height,
- int border_offset,
- uint8_t *const dst, int dst_buf_stride,
- int subpel_x, int subpel_y,
- const InterpKernel *kernel,
- const struct scale_factors *sf,
- MACROBLOCKD *xd,
- int w, int h, int ref, int xs, int ys) {- DECLARE_ALIGNED(16, uint16_t, mc_buf_high[80 * 2 * 80 * 2]);
- const uint8_t *buf_ptr;
-
- if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {- high_build_mc_border(buf_ptr1, pre_buf_stride, mc_buf_high, b_w,
- x0, y0, b_w, b_h, frame_width, frame_height);
- buf_ptr = CONVERT_TO_BYTEPTR(mc_buf_high) + border_offset;
- } else {- build_mc_border(buf_ptr1, pre_buf_stride, (uint8_t *)mc_buf_high, b_w,
- x0, y0, b_w, b_h, frame_width, frame_height);
- buf_ptr = ((uint8_t *)mc_buf_high) + border_offset;
- }
-
- if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {- high_inter_predictor(buf_ptr, b_w, dst, dst_buf_stride, subpel_x,
- subpel_y, sf, w, h, ref, kernel, xs, ys, xd->bd);
- } else {- inter_predictor(buf_ptr, b_w, dst, dst_buf_stride, subpel_x,
- subpel_y, sf, w, h, ref, kernel, xs, ys);
- }
-}
-#else
-static void extend_and_predict(const uint8_t *buf_ptr1, int pre_buf_stride,
- int x0, int y0, int b_w, int b_h,
- int frame_width, int frame_height,
- int border_offset,
- uint8_t *const dst, int dst_buf_stride,
- int subpel_x, int subpel_y,
- const InterpKernel *kernel,
- const struct scale_factors *sf,
- int w, int h, int ref, int xs, int ys) {- DECLARE_ALIGNED(16, uint8_t, mc_buf[80 * 2 * 80 * 2]);
- const uint8_t *buf_ptr;
-
- build_mc_border(buf_ptr1, pre_buf_stride, mc_buf, b_w,
- x0, y0, b_w, b_h, frame_width, frame_height);
- buf_ptr = mc_buf + border_offset;
-
- inter_predictor(buf_ptr, b_w, dst, dst_buf_stride, subpel_x,
- subpel_y, sf, w, h, ref, kernel, xs, ys);
-}
-#endif // CONFIG_VP9_HIGHBITDEPTH
-
-static void dec_build_inter_predictors(VP9Decoder *const pbi, MACROBLOCKD *xd,
- int plane, int bw, int bh, int x,
- int y, int w, int h, int mi_x, int mi_y,
- const InterpKernel *kernel,
- const struct scale_factors *sf,
- struct buf_2d *pre_buf,
- struct buf_2d *dst_buf, const MV* mv,
- RefCntBuffer *ref_frame_buf,
- int is_scaled, int ref) {- struct macroblockd_plane *const pd = &xd->plane[plane];
- uint8_t *const dst = dst_buf->buf + dst_buf->stride * y + x;
- 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;
-
- // Get reference frame pointer, width and height.
- if (plane == 0) {- frame_width = ref_frame_buf->buf.y_crop_width;
- frame_height = ref_frame_buf->buf.y_crop_height;
- ref_frame = ref_frame_buf->buf.y_buffer;
- } else {- frame_width = ref_frame_buf->buf.uv_crop_width;
- frame_height = ref_frame_buf->buf.uv_crop_height;
- ref_frame = plane == 1 ? ref_frame_buf->buf.u_buffer
- : ref_frame_buf->buf.v_buffer;
- }
-
- if (is_scaled) {- const MV mv_q4 = clamp_mv_to_umv_border_sb(xd, mv, bw, bh,
- pd->subsampling_x,
- pd->subsampling_y);
- // 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->row * (1 << (1 - pd->subsampling_y));
- scaled_mv.col = mv->col * (1 << (1 - pd->subsampling_x));
- 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)) {- int y1 = (y0_16 + (h - 1) * ys) >> SUBPEL_BITS;
-
- // Get reference block bottom right horizontal coordinate.
- int x1 = (x0_16 + (w - 1) * xs) >> SUBPEL_BITS;
- 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;
- }
-
- // Wait until reference block is ready. Pad 7 more pixels as last 7
- // pixels of each superblock row can be changed by next superblock row.
- if (pbi->frame_parallel_decode)
- vp9_frameworker_wait(pbi->frame_worker_owner, ref_frame_buf,
- MAX(0, (y1 + 7)) << (plane == 0 ? 0 : 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) {- // Extend the border.
- const uint8_t *const buf_ptr1 = ref_frame + y0 * buf_stride + x0;
- const int b_w = x1 - x0 + 1;
- const int b_h = y1 - y0 + 1;
- const int border_offset = y_pad * 3 * b_w + x_pad * 3;
-
- extend_and_predict(buf_ptr1, buf_stride, x0, y0, b_w, b_h,
- frame_width, frame_height, border_offset,
- dst, dst_buf->stride,
- subpel_x, subpel_y,
- kernel, sf,
-#if CONFIG_VP9_HIGHBITDEPTH
- xd,
-#endif
- w, h, ref, xs, ys);
- return;
- }
- } else {- // Wait until reference block is ready. Pad 7 more pixels as last 7
- // pixels of each superblock row can be changed by next superblock row.
- if (pbi->frame_parallel_decode) {- const int y1 = (y0_16 + (h - 1) * ys) >> SUBPEL_BITS;
- vp9_frameworker_wait(pbi->frame_worker_owner, ref_frame_buf,
- MAX(0, (y1 + 7)) << (plane == 0 ? 0 : 1));
- }
- }
-#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
-}
-
-static void dec_build_inter_predictors_sb(VP9Decoder *const pbi,
- 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;
- const MODE_INFO *mi = xd->mi[0];
- const InterpKernel *kernel = vp9_get_interp_kernel(mi->mbmi.interp_filter);
- const BLOCK_SIZE sb_type = mi->mbmi.sb_type;
- const int is_compound = has_second_ref(&mi->mbmi);
-
- for (plane = 0; plane < MAX_MB_PLANE; ++plane) {- const BLOCK_SIZE plane_bsize = get_plane_block_size(bsize,
- &xd->plane[plane]);
- struct macroblockd_plane *const pd = &xd->plane[plane];
- struct buf_2d *const dst_buf = &pd->dst;
- 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;
- 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];
- const int idx = xd->block_refs[ref]->idx;
- BufferPool *const pool = pbi->common.buffer_pool;
- RefCntBuffer *const ref_frame_buf = &pool->frame_bufs[idx];
- const int is_scaled = vp9_is_scaled(sf);
-
- if (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) {- const MV mv = average_split_mvs(pd, mi, ref, i++);
- dec_build_inter_predictors(pbi, xd, plane, bw, bh,
- 4 * x, 4 * y, 4, 4, mi_x, mi_y, kernel,
- sf, pre_buf, dst_buf, &mv,
- ref_frame_buf, is_scaled, ref);
- }
- }
- } else {- const MV mv = mi->mbmi.mv[ref].as_mv;
- dec_build_inter_predictors(pbi, xd, plane, bw, bh,
- 0, 0, bw, bh, mi_x, mi_y, kernel,
- sf, pre_buf, dst_buf, &mv, ref_frame_buf,
- is_scaled, ref);
- }
- }
- }
}