| /* |
| * Copyright (c) 2014 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 <math.h> |
| #include "vp10/common/blockd.h" |
| |
| PREDICTION_MODE vp10_left_block_mode(const MODE_INFO *cur_mi, |
| const MODE_INFO *left_mi, int b) { |
| if (b == 0 || b == 2) { |
| if (!left_mi || is_inter_block(&left_mi->mbmi)) |
| return DC_PRED; |
| |
| return get_y_mode(left_mi, b + 1); |
| } else { |
| assert(b == 1 || b == 3); |
| return cur_mi->bmi[b - 1].as_mode; |
| } |
| } |
| |
| PREDICTION_MODE vp10_above_block_mode(const MODE_INFO *cur_mi, |
| const MODE_INFO *above_mi, int b) { |
| if (b == 0 || b == 1) { |
| if (!above_mi || is_inter_block(&above_mi->mbmi)) |
| return DC_PRED; |
| |
| return get_y_mode(above_mi, b + 2); |
| } else { |
| assert(b == 2 || b == 3); |
| return cur_mi->bmi[b - 2].as_mode; |
| } |
| } |
| |
| void vp10_foreach_transformed_block_in_plane( |
| const MACROBLOCKD *const xd, BLOCK_SIZE bsize, int plane, |
| foreach_transformed_block_visitor visit, void *arg) { |
| const struct macroblockd_plane *const pd = &xd->plane[plane]; |
| const MB_MODE_INFO* mbmi = &xd->mi[0]->mbmi; |
| // block and transform sizes, in number of 4x4 blocks log 2 ("*_b") |
| // 4x4=0, 8x8=2, 16x16=4, 32x32=6, 64x64=8 |
| // transform size varies per plane, look it up in a common way. |
| const TX_SIZE tx_size = plane ? get_uv_tx_size(mbmi, pd) |
| : mbmi->tx_size; |
| const BLOCK_SIZE plane_bsize = get_plane_block_size(bsize, pd); |
| 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 step = 1 << (tx_size << 1); |
| int i = 0, r, c; |
| |
| // If mb_to_right_edge is < 0 we are in a situation in which |
| // the current block size extends into the UMV and we won't |
| // visit the sub blocks that are wholly within the UMV. |
| const int max_blocks_wide = num_4x4_w + (xd->mb_to_right_edge >= 0 ? 0 : |
| xd->mb_to_right_edge >> (5 + pd->subsampling_x)); |
| const int max_blocks_high = num_4x4_h + (xd->mb_to_bottom_edge >= 0 ? 0 : |
| xd->mb_to_bottom_edge >> (5 + pd->subsampling_y)); |
| const int extra_step = ((num_4x4_w - max_blocks_wide) >> tx_size) * step; |
| |
| // Keep track of the row and column of the blocks we use so that we know |
| // if we are in the unrestricted motion border. |
| for (r = 0; r < max_blocks_high; r += (1 << tx_size)) { |
| // Skip visiting the sub blocks that are wholly within the UMV. |
| for (c = 0; c < max_blocks_wide; c += (1 << tx_size)) { |
| visit(plane, i, r, c, plane_bsize, tx_size, arg); |
| i += step; |
| } |
| i += extra_step; |
| } |
| } |
| |
| void vp10_foreach_transformed_block(const MACROBLOCKD* const xd, |
| BLOCK_SIZE bsize, |
| foreach_transformed_block_visitor visit, |
| void *arg) { |
| int plane; |
| |
| for (plane = 0; plane < MAX_MB_PLANE; ++plane) |
| vp10_foreach_transformed_block_in_plane(xd, bsize, plane, visit, arg); |
| } |
| |
| void vp10_set_contexts(const MACROBLOCKD *xd, struct macroblockd_plane *pd, |
| BLOCK_SIZE plane_bsize, TX_SIZE tx_size, int has_eob, |
| int aoff, int loff) { |
| ENTROPY_CONTEXT *const a = pd->above_context + aoff; |
| ENTROPY_CONTEXT *const l = pd->left_context + loff; |
| const int tx_size_in_blocks = 1 << tx_size; |
| |
| // above |
| if (has_eob && xd->mb_to_right_edge < 0) { |
| int i; |
| const int blocks_wide = num_4x4_blocks_wide_lookup[plane_bsize] + |
| (xd->mb_to_right_edge >> (5 + pd->subsampling_x)); |
| int above_contexts = tx_size_in_blocks; |
| if (above_contexts + aoff > blocks_wide) |
| above_contexts = blocks_wide - aoff; |
| |
| for (i = 0; i < above_contexts; ++i) |
| a[i] = has_eob; |
| for (i = above_contexts; i < tx_size_in_blocks; ++i) |
| a[i] = 0; |
| } else { |
| memset(a, has_eob, sizeof(ENTROPY_CONTEXT) * tx_size_in_blocks); |
| } |
| |
| // left |
| if (has_eob && xd->mb_to_bottom_edge < 0) { |
| int i; |
| const int blocks_high = num_4x4_blocks_high_lookup[plane_bsize] + |
| (xd->mb_to_bottom_edge >> (5 + pd->subsampling_y)); |
| int left_contexts = tx_size_in_blocks; |
| if (left_contexts + loff > blocks_high) |
| left_contexts = blocks_high - loff; |
| |
| for (i = 0; i < left_contexts; ++i) |
| l[i] = has_eob; |
| for (i = left_contexts; i < tx_size_in_blocks; ++i) |
| l[i] = 0; |
| } else { |
| memset(l, has_eob, sizeof(ENTROPY_CONTEXT) * tx_size_in_blocks); |
| } |
| } |
| |
| void vp10_setup_block_planes(MACROBLOCKD *xd, int ss_x, int ss_y) { |
| int i; |
| |
| for (i = 0; i < MAX_MB_PLANE; i++) { |
| xd->plane[i].plane_type = i ? PLANE_TYPE_UV : PLANE_TYPE_Y; |
| xd->plane[i].subsampling_x = i ? ss_x : 0; |
| xd->plane[i].subsampling_y = i ? ss_y : 0; |
| } |
| } |
| |
| #if CONFIG_EXT_INTRA |
| #define PI 3.14159265 |
| // Returns whether filter selection is needed for a given |
| // intra prediction angle. |
| int pick_intra_filter(int angle) { |
| if (angle % 45 == 0) |
| return 0; |
| if (angle > 90 && angle < 180) { |
| return 1; |
| } else { |
| double t = tan(angle * PI / 180.0); |
| double n; |
| if (angle < 90) |
| t = 1 / t; |
| n = floor(t); |
| return (t - n) * 1024 > 1; |
| } |
| } |
| #endif // CONFIG_EXT_INTRA |