| /* |
| * 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 "vpx_ports/system_state.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 |
| // If angle > 0 && angle < 90, dx = -((int)(256 / t)), dy = 1; |
| // If angle > 90 && angle < 180, dx = (int)(256 / t), dy = (int)(256 * t); |
| // If angle > 180 && angle < 270, dx = 1, dy = -((int)(256 * t)); |
| const int16_t dr_intra_derivative[270][2] = { |
| { 1, 1 }, { -14666, 1 }, { -7330, 1 }, { -4884, 1 }, |
| { -3660, 1 }, { -2926, 1 }, { -2435, 1 }, { -2084, 1 }, |
| { -1821, 1 }, { -1616, 1 }, { -1451, 1 }, { -1317, 1 }, |
| { -1204, 1 }, { -1108, 1 }, { -1026, 1 }, { -955, 1 }, |
| { -892, 1 }, { -837, 1 }, { -787, 1 }, { -743, 1 }, |
| { -703, 1 }, { -666, 1 }, { -633, 1 }, { -603, 1 }, |
| { -574, 1 }, { -548, 1 }, { -524, 1 }, { -502, 1 }, |
| { -481, 1 }, { -461, 1 }, { -443, 1 }, { -426, 1 }, |
| { -409, 1 }, { -394, 1 }, { -379, 1 }, { -365, 1 }, |
| { -352, 1 }, { -339, 1 }, { -327, 1 }, { -316, 1 }, |
| { -305, 1 }, { -294, 1 }, { -284, 1 }, { -274, 1 }, |
| { -265, 1 }, { -256, 1 }, { -247, 1 }, { -238, 1 }, |
| { -230, 1 }, { -222, 1 }, { -214, 1 }, { -207, 1 }, |
| { -200, 1 }, { -192, 1 }, { -185, 1 }, { -179, 1 }, |
| { -172, 1 }, { -166, 1 }, { -159, 1 }, { -153, 1 }, |
| { -147, 1 }, { -141, 1 }, { -136, 1 }, { -130, 1 }, |
| { -124, 1 }, { -119, 1 }, { -113, 1 }, { -108, 1 }, |
| { -103, 1 }, { -98, 1 }, { -93, 1 }, { -88, 1 }, |
| { -83, 1 }, { -78, 1 }, { -73, 1 }, { -68, 1 }, |
| { -63, 1 }, { -59, 1 }, { -54, 1 }, { -49, 1 }, |
| { -45, 1 }, { -40, 1 }, { -35, 1 }, { -31, 1 }, |
| { -26, 1 }, { -22, 1 }, { -17, 1 }, { -13, 1 }, |
| { -8, 1 }, { -4, 1 }, { 1, 1 }, { 4, 14666 }, |
| { 8, 7330 }, { 13, 4884 }, { 17, 3660 }, { 22, 2926 }, |
| { 26, 2435 }, { 31, 2084 }, { 35, 1821 }, { 40, 1616 }, |
| { 45, 1451 }, { 49, 1317 }, { 54, 1204 }, { 59, 1108 }, |
| { 63, 1026 }, { 68, 955 }, { 73, 892 }, { 78, 837 }, |
| { 83, 787 }, { 88, 743 }, { 93, 703 }, { 98, 666 }, |
| { 103, 633 }, { 108, 603 }, { 113, 574 }, { 119, 548 }, |
| { 124, 524 }, { 130, 502 }, { 136, 481 }, { 141, 461 }, |
| { 147, 443 }, { 153, 426 }, { 159, 409 }, { 166, 394 }, |
| { 172, 379 }, { 179, 365 }, { 185, 352 }, { 192, 339 }, |
| { 200, 327 }, { 207, 316 }, { 214, 305 }, { 222, 294 }, |
| { 230, 284 }, { 238, 274 }, { 247, 265 }, { 255, 256 }, |
| { 265, 247 }, { 274, 238 }, { 284, 230 }, { 294, 222 }, |
| { 305, 214 }, { 316, 207 }, { 327, 200 }, { 339, 192 }, |
| { 352, 185 }, { 365, 179 }, { 379, 172 }, { 394, 166 }, |
| { 409, 159 }, { 426, 153 }, { 443, 147 }, { 461, 141 }, |
| { 481, 136 }, { 502, 130 }, { 524, 124 }, { 548, 119 }, |
| { 574, 113 }, { 603, 108 }, { 633, 103 }, { 666, 98 }, |
| { 703, 93 }, { 743, 88 }, { 787, 83 }, { 837, 78 }, |
| { 892, 73 }, { 955, 68 }, { 1026, 63 }, { 1108, 59 }, |
| { 1204, 54 }, { 1317, 49 }, { 1451, 45 }, { 1616, 40 }, |
| { 1821, 35 }, { 2084, 31 }, { 2435, 26 }, { 2926, 22 }, |
| { 3660, 17 }, { 4884, 13 }, { 7330, 8 }, { 14666, 4 }, |
| { 1, 1 }, { 1, -4 }, { 1, -8 }, { 1, -13 }, |
| { 1, -17 }, { 1, -22 }, { 1, -26 }, { 1, -31 }, |
| { 1, -35 }, { 1, -40 }, { 1, -45 }, { 1, -49 }, |
| { 1, -54 }, { 1, -59 }, { 1, -63 }, { 1, -68 }, |
| { 1, -73 }, { 1, -78 }, { 1, -83 }, { 1, -88 }, |
| { 1, -93 }, { 1, -98 }, { 1, -103 }, { 1, -108 }, |
| { 1, -113 }, { 1, -119 }, { 1, -124 }, { 1, -130 }, |
| { 1, -136 }, { 1, -141 }, { 1, -147 }, { 1, -153 }, |
| { 1, -159 }, { 1, -166 }, { 1, -172 }, { 1, -179 }, |
| { 1, -185 }, { 1, -192 }, { 1, -200 }, { 1, -207 }, |
| { 1, -214 }, { 1, -222 }, { 1, -230 }, { 1, -238 }, |
| { 1, -247 }, { 1, -255 }, { 1, -265 }, { 1, -274 }, |
| { 1, -284 }, { 1, -294 }, { 1, -305 }, { 1, -316 }, |
| { 1, -327 }, { 1, -339 }, { 1, -352 }, { 1, -365 }, |
| { 1, -379 }, { 1, -394 }, { 1, -409 }, { 1, -426 }, |
| { 1, -443 }, { 1, -461 }, { 1, -481 }, { 1, -502 }, |
| { 1, -524 }, { 1, -548 }, { 1, -574 }, { 1, -603 }, |
| { 1, -633 }, { 1, -666 }, { 1, -703 }, { 1, -743 }, |
| { 1, -787 }, { 1, -837 }, { 1, -892 }, { 1, -955 }, |
| { 1, -1026 }, { 1, -1108 }, { 1, -1204 }, { 1, -1317 }, |
| { 1, -1451 }, { 1, -1616 }, { 1, -1821 }, { 1, -2084 }, |
| { 1, -2435 }, { 1, -2926 }, { 1, -3660 }, { 1, -4884 }, |
| { 1, -7330 }, { 1, -14666 }, |
| }; |
| |
| // Returns whether filter selection is needed for a given |
| // intra prediction angle. |
| int pick_intra_filter(int angle) { |
| assert(angle > 0 && angle < 270); |
| if (angle % 45 == 0) |
| return 0; |
| if (angle > 90 && angle < 180) { |
| return 1; |
| } else { |
| return ((-(dr_intra_derivative[angle][angle > 180])) & 0xFF) > 0; |
| } |
| } |
| #endif // CONFIG_EXT_INTRA |
