| /* |
| * 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 "vpx_ports/config.h" |
| #include "vpx_mem/vpx_mem.h" |
| #include "reconintra.h" |
| #include "vpx_rtcd.h" |
| |
| void vp8_intra4x4_predict_c(BLOCKD *x, int b_mode, |
| unsigned char *predictor) { |
| int i, r, c; |
| |
| unsigned char *Above = *(x->base_dst) + x->dst - x->dst_stride; |
| unsigned char Left[4]; |
| unsigned char top_left = Above[-1]; |
| |
| Left[0] = (*(x->base_dst))[x->dst - 1]; |
| Left[1] = (*(x->base_dst))[x->dst - 1 + x->dst_stride]; |
| Left[2] = (*(x->base_dst))[x->dst - 1 + 2 * x->dst_stride]; |
| Left[3] = (*(x->base_dst))[x->dst - 1 + 3 * x->dst_stride]; |
| |
| switch (b_mode) { |
| case B_DC_PRED: { |
| int expected_dc = 0; |
| |
| for (i = 0; i < 4; i++) { |
| expected_dc += Above[i]; |
| expected_dc += Left[i]; |
| } |
| |
| expected_dc = (expected_dc + 4) >> 3; |
| |
| for (r = 0; r < 4; r++) { |
| for (c = 0; c < 4; c++) { |
| predictor[c] = expected_dc; |
| } |
| |
| predictor += 16; |
| } |
| } |
| break; |
| case B_TM_PRED: { |
| /* prediction similar to true_motion prediction */ |
| for (r = 0; r < 4; r++) { |
| for (c = 0; c < 4; c++) { |
| int pred = Above[c] - top_left + Left[r]; |
| |
| if (pred < 0) |
| pred = 0; |
| |
| if (pred > 255) |
| pred = 255; |
| |
| predictor[c] = pred; |
| } |
| |
| predictor += 16; |
| } |
| } |
| break; |
| |
| case B_VE_PRED: { |
| |
| unsigned int ap[4]; |
| ap[0] = Above[0]; |
| ap[1] = Above[1]; |
| ap[2] = Above[2]; |
| ap[3] = Above[3]; |
| |
| for (r = 0; r < 4; r++) { |
| for (c = 0; c < 4; c++) { |
| |
| predictor[c] = ap[c]; |
| } |
| |
| predictor += 16; |
| } |
| |
| } |
| break; |
| |
| |
| case B_HE_PRED: { |
| |
| unsigned int lp[4]; |
| lp[0] = Left[0]; |
| lp[1] = Left[1]; |
| lp[2] = Left[2]; |
| lp[3] = Left[3]; |
| |
| for (r = 0; r < 4; r++) { |
| for (c = 0; c < 4; c++) { |
| predictor[c] = lp[r]; |
| } |
| |
| predictor += 16; |
| } |
| } |
| break; |
| case B_LD_PRED: { |
| unsigned char *ptr = Above; |
| predictor[0 * 16 + 0] = (ptr[0] + ptr[1] * 2 + ptr[2] + 2) >> 2; |
| predictor[0 * 16 + 1] = |
| predictor[1 * 16 + 0] = (ptr[1] + ptr[2] * 2 + ptr[3] + 2) >> 2; |
| predictor[0 * 16 + 2] = |
| predictor[1 * 16 + 1] = |
| predictor[2 * 16 + 0] = (ptr[2] + ptr[3] * 2 + ptr[4] + 2) >> 2; |
| predictor[0 * 16 + 3] = |
| predictor[1 * 16 + 2] = |
| predictor[2 * 16 + 1] = |
| predictor[3 * 16 + 0] = (ptr[3] + ptr[4] * 2 + ptr[5] + 2) >> 2; |
| predictor[1 * 16 + 3] = |
| predictor[2 * 16 + 2] = |
| predictor[3 * 16 + 1] = (ptr[4] + ptr[5] * 2 + ptr[6] + 2) >> 2; |
| predictor[2 * 16 + 3] = |
| predictor[3 * 16 + 2] = (ptr[5] + ptr[6] * 2 + ptr[7] + 2) >> 2; |
| predictor[3 * 16 + 3] = (ptr[6] + ptr[7] * 2 + ptr[7] + 2) >> 2; |
| |
| } |
| break; |
| case B_RD_PRED: { |
| |
| unsigned char pp[9]; |
| |
| pp[0] = Left[3]; |
| pp[1] = Left[2]; |
| pp[2] = Left[1]; |
| pp[3] = Left[0]; |
| pp[4] = top_left; |
| pp[5] = Above[0]; |
| pp[6] = Above[1]; |
| pp[7] = Above[2]; |
| pp[8] = Above[3]; |
| |
| predictor[3 * 16 + 0] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2; |
| predictor[3 * 16 + 1] = |
| predictor[2 * 16 + 0] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2; |
| predictor[3 * 16 + 2] = |
| predictor[2 * 16 + 1] = |
| predictor[1 * 16 + 0] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2; |
| predictor[3 * 16 + 3] = |
| predictor[2 * 16 + 2] = |
| predictor[1 * 16 + 1] = |
| predictor[0 * 16 + 0] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2; |
| predictor[2 * 16 + 3] = |
| predictor[1 * 16 + 2] = |
| predictor[0 * 16 + 1] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2; |
| predictor[1 * 16 + 3] = |
| predictor[0 * 16 + 2] = (pp[5] + pp[6] * 2 + pp[7] + 2) >> 2; |
| predictor[0 * 16 + 3] = (pp[6] + pp[7] * 2 + pp[8] + 2) >> 2; |
| |
| } |
| break; |
| case B_VR_PRED: { |
| |
| unsigned char pp[9]; |
| |
| pp[0] = Left[3]; |
| pp[1] = Left[2]; |
| pp[2] = Left[1]; |
| pp[3] = Left[0]; |
| pp[4] = top_left; |
| pp[5] = Above[0]; |
| pp[6] = Above[1]; |
| pp[7] = Above[2]; |
| pp[8] = Above[3]; |
| |
| |
| predictor[3 * 16 + 0] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2; |
| predictor[2 * 16 + 0] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2; |
| predictor[3 * 16 + 1] = |
| predictor[1 * 16 + 0] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2; |
| predictor[2 * 16 + 1] = |
| predictor[0 * 16 + 0] = (pp[4] + pp[5] + 1) >> 1; |
| predictor[3 * 16 + 2] = |
| predictor[1 * 16 + 1] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2; |
| predictor[2 * 16 + 2] = |
| predictor[0 * 16 + 1] = (pp[5] + pp[6] + 1) >> 1; |
| predictor[3 * 16 + 3] = |
| predictor[1 * 16 + 2] = (pp[5] + pp[6] * 2 + pp[7] + 2) >> 2; |
| predictor[2 * 16 + 3] = |
| predictor[0 * 16 + 2] = (pp[6] + pp[7] + 1) >> 1; |
| predictor[1 * 16 + 3] = (pp[6] + pp[7] * 2 + pp[8] + 2) >> 2; |
| predictor[0 * 16 + 3] = (pp[7] + pp[8] + 1) >> 1; |
| |
| } |
| break; |
| case B_VL_PRED: { |
| |
| unsigned char *pp = Above; |
| |
| predictor[0 * 16 + 0] = (pp[0] + pp[1] + 1) >> 1; |
| predictor[1 * 16 + 0] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2; |
| predictor[2 * 16 + 0] = |
| predictor[0 * 16 + 1] = (pp[1] + pp[2] + 1) >> 1; |
| predictor[1 * 16 + 1] = |
| predictor[3 * 16 + 0] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2; |
| predictor[2 * 16 + 1] = |
| predictor[0 * 16 + 2] = (pp[2] + pp[3] + 1) >> 1; |
| predictor[3 * 16 + 1] = |
| predictor[1 * 16 + 2] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2; |
| predictor[0 * 16 + 3] = |
| predictor[2 * 16 + 2] = (pp[3] + pp[4] + 1) >> 1; |
| predictor[1 * 16 + 3] = |
| predictor[3 * 16 + 2] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2; |
| predictor[2 * 16 + 3] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2; |
| predictor[3 * 16 + 3] = (pp[5] + pp[6] * 2 + pp[7] + 2) >> 2; |
| } |
| break; |
| |
| case B_HD_PRED: { |
| unsigned char pp[9]; |
| pp[0] = Left[3]; |
| pp[1] = Left[2]; |
| pp[2] = Left[1]; |
| pp[3] = Left[0]; |
| pp[4] = top_left; |
| pp[5] = Above[0]; |
| pp[6] = Above[1]; |
| pp[7] = Above[2]; |
| pp[8] = Above[3]; |
| |
| |
| predictor[3 * 16 + 0] = (pp[0] + pp[1] + 1) >> 1; |
| predictor[3 * 16 + 1] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2; |
| predictor[2 * 16 + 0] = |
| predictor[3 * 16 + 2] = (pp[1] + pp[2] + 1) >> 1; |
| predictor[2 * 16 + 1] = |
| predictor[3 * 16 + 3] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2; |
| predictor[2 * 16 + 2] = |
| predictor[1 * 16 + 0] = (pp[2] + pp[3] + 1) >> 1; |
| predictor[2 * 16 + 3] = |
| predictor[1 * 16 + 1] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2; |
| predictor[1 * 16 + 2] = |
| predictor[0 * 16 + 0] = (pp[3] + pp[4] + 1) >> 1; |
| predictor[1 * 16 + 3] = |
| predictor[0 * 16 + 1] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2; |
| predictor[0 * 16 + 2] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2; |
| predictor[0 * 16 + 3] = (pp[5] + pp[6] * 2 + pp[7] + 2) >> 2; |
| } |
| break; |
| |
| |
| case B_HU_PRED: { |
| unsigned char *pp = Left; |
| predictor[0 * 16 + 0] = (pp[0] + pp[1] + 1) >> 1; |
| predictor[0 * 16 + 1] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2; |
| predictor[0 * 16 + 2] = |
| predictor[1 * 16 + 0] = (pp[1] + pp[2] + 1) >> 1; |
| predictor[0 * 16 + 3] = |
| predictor[1 * 16 + 1] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2; |
| predictor[1 * 16 + 2] = |
| predictor[2 * 16 + 0] = (pp[2] + pp[3] + 1) >> 1; |
| predictor[1 * 16 + 3] = |
| predictor[2 * 16 + 1] = (pp[2] + pp[3] * 2 + pp[3] + 2) >> 2; |
| predictor[2 * 16 + 2] = |
| predictor[2 * 16 + 3] = |
| predictor[3 * 16 + 0] = |
| predictor[3 * 16 + 1] = |
| predictor[3 * 16 + 2] = |
| predictor[3 * 16 + 3] = pp[3]; |
| } |
| break; |
| |
| |
| } |
| } |
| |
| #if CONFIG_COMP_INTRA_PRED |
| void vp8_comp_intra4x4_predict_c(BLOCKD *x, |
| int b_mode, int b_mode2, |
| unsigned char *out_predictor) { |
| unsigned char predictor[2][4 * 16]; |
| int i, j; |
| |
| vp8_intra4x4_predict(x, b_mode, predictor[0]); |
| vp8_intra4x4_predict(x, b_mode2, predictor[1]); |
| |
| for (i = 0; i < 16 * 4; i += 16) { |
| for (j = i; j < i + 4; j++) { |
| out_predictor[j] = (predictor[0][j] + predictor[1][j] + 1) >> 1; |
| } |
| } |
| } |
| #endif |
| |
| /* copy 4 bytes from the above right down so that the 4x4 prediction modes using pixels above and |
| * to the right prediction have filled in pixels to use. |
| */ |
| void vp8_intra_prediction_down_copy(MACROBLOCKD *xd) { |
| int extend_edge = (xd->mb_to_right_edge == 0 && xd->mb_index < 2); |
| unsigned char *above_right = *(xd->block[0].base_dst) + xd->block[0].dst - |
| xd->block[0].dst_stride + 16; |
| unsigned int *src_ptr = (unsigned int *) |
| (above_right - (xd->mb_index == 3 ? 16 * xd->block[0].dst_stride : 0)); |
| |
| unsigned int *dst_ptr0 = (unsigned int *)above_right; |
| unsigned int *dst_ptr1 = |
| (unsigned int *)(above_right + 4 * xd->block[0].dst_stride); |
| unsigned int *dst_ptr2 = |
| (unsigned int *)(above_right + 8 * xd->block[0].dst_stride); |
| unsigned int *dst_ptr3 = |
| (unsigned int *)(above_right + 12 * xd->block[0].dst_stride); |
| |
| if (extend_edge) { |
| *src_ptr = ((uint8_t *) src_ptr)[-1] * 0x01010101U; |
| } |
| |
| *dst_ptr0 = *src_ptr; |
| *dst_ptr1 = *src_ptr; |
| *dst_ptr2 = *src_ptr; |
| *dst_ptr3 = *src_ptr; |
| } |
