/* * 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_config.h" #include "vpx_rtcd.h" #include "blockd.h" void vp8_intra4x4_predict_c(unsigned char *src, int src_stride, int b_mode, unsigned char *dst, int dst_stride) { int i, r, c; unsigned char *Above = src - src_stride; unsigned char Left[4]; unsigned char top_left = Above[-1]; Left[0] = src[-1]; Left[1] = src[-1 + src_stride]; Left[2] = src[-1 + 2 * src_stride]; Left[3] = src[-1 + 3 * src_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++) { dst[c] = expected_dc; } dst += dst_stride; } } 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; dst[c] = pred; } dst += dst_stride; } } break; case B_VE_PRED: { unsigned int ap[4]; ap[0] = (top_left + 2 * Above[0] + Above[1] + 2) >> 2; ap[1] = (Above[0] + 2 * Above[1] + Above[2] + 2) >> 2; ap[2] = (Above[1] + 2 * Above[2] + Above[3] + 2) >> 2; ap[3] = (Above[2] + 2 * Above[3] + Above[4] + 2) >> 2; for (r = 0; r < 4; r++) { for (c = 0; c < 4; c++) { dst[c] = ap[c]; } dst += dst_stride; } } break; case B_HE_PRED: { unsigned int lp[4]; lp[0] = (top_left + 2 * Left[0] + Left[1] + 2) >> 2; lp[1] = (Left[0] + 2 * Left[1] + Left[2] + 2) >> 2; lp[2] = (Left[1] + 2 * Left[2] + Left[3] + 2) >> 2; lp[3] = (Left[2] + 2 * Left[3] + Left[3] + 2) >> 2; for (r = 0; r < 4; r++) { for (c = 0; c < 4; c++) { dst[c] = lp[r]; } dst += dst_stride; } } break; case B_LD_PRED: { unsigned char *ptr = Above; dst[0 * dst_stride + 0] = (ptr[0] + ptr[1] * 2 + ptr[2] + 2) >> 2; dst[0 * dst_stride + 1] = dst[1 * dst_stride + 0] = (ptr[1] + ptr[2] * 2 + ptr[3] + 2) >> 2; dst[0 * dst_stride + 2] = dst[1 * dst_stride + 1] = dst[2 * dst_stride + 0] = (ptr[2] + ptr[3] * 2 + ptr[4] + 2) >> 2; dst[0 * dst_stride + 3] = dst[1 * dst_stride + 2] = dst[2 * dst_stride + 1] = dst[3 * dst_stride + 0] = (ptr[3] + ptr[4] * 2 + ptr[5] + 2) >> 2; dst[1 * dst_stride + 3] = dst[2 * dst_stride + 2] = dst[3 * dst_stride + 1] = (ptr[4] + ptr[5] * 2 + ptr[6] + 2) >> 2; dst[2 * dst_stride + 3] = dst[3 * dst_stride + 2] = (ptr[5] + ptr[6] * 2 + ptr[7] + 2) >> 2; dst[3 * dst_stride + 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]; dst[3 * dst_stride + 0] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2; dst[3 * dst_stride + 1] = dst[2 * dst_stride + 0] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2; dst[3 * dst_stride + 2] = dst[2 * dst_stride + 1] = dst[1 * dst_stride + 0] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2; dst[3 * dst_stride + 3] = dst[2 * dst_stride + 2] = dst[1 * dst_stride + 1] = dst[0 * dst_stride + 0] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2; dst[2 * dst_stride + 3] = dst[1 * dst_stride + 2] = dst[0 * dst_stride + 1] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2; dst[1 * dst_stride + 3] = dst[0 * dst_stride + 2] = (pp[5] + pp[6] * 2 + pp[7] + 2) >> 2; dst[0 * dst_stride + 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]; dst[3 * dst_stride + 0] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2; dst[2 * dst_stride + 0] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2; dst[3 * dst_stride + 1] = dst[1 * dst_stride + 0] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2; dst[2 * dst_stride + 1] = dst[0 * dst_stride + 0] = (pp[4] + pp[5] + 1) >> 1; dst[3 * dst_stride + 2] = dst[1 * dst_stride + 1] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2; dst[2 * dst_stride + 2] = dst[0 * dst_stride + 1] = (pp[5] + pp[6] + 1) >> 1; dst[3 * dst_stride + 3] = dst[1 * dst_stride + 2] = (pp[5] + pp[6] * 2 + pp[7] + 2) >> 2; dst[2 * dst_stride + 3] = dst[0 * dst_stride + 2] = (pp[6] + pp[7] + 1) >> 1; dst[1 * dst_stride + 3] = (pp[6] + pp[7] * 2 + pp[8] + 2) >> 2; dst[0 * dst_stride + 3] = (pp[7] + pp[8] + 1) >> 1; } break; case B_VL_PRED: { unsigned char *pp = Above; dst[0 * dst_stride + 0] = (pp[0] + pp[1] + 1) >> 1; dst[1 * dst_stride + 0] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2; dst[2 * dst_stride + 0] = dst[0 * dst_stride + 1] = (pp[1] + pp[2] + 1) >> 1; dst[1 * dst_stride + 1] = dst[3 * dst_stride + 0] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2; dst[2 * dst_stride + 1] = dst[0 * dst_stride + 2] = (pp[2] + pp[3] + 1) >> 1; dst[3 * dst_stride + 1] = dst[1 * dst_stride + 2] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2; dst[0 * dst_stride + 3] = dst[2 * dst_stride + 2] = (pp[3] + pp[4] + 1) >> 1; dst[1 * dst_stride + 3] = dst[3 * dst_stride + 2] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2; dst[2 * dst_stride + 3] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2; dst[3 * dst_stride + 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]; dst[3 * dst_stride + 0] = (pp[0] + pp[1] + 1) >> 1; dst[3 * dst_stride + 1] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2; dst[2 * dst_stride + 0] = dst[3 * dst_stride + 2] = (pp[1] + pp[2] + 1) >> 1; dst[2 * dst_stride + 1] = dst[3 * dst_stride + 3] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2; dst[2 * dst_stride + 2] = dst[1 * dst_stride + 0] = (pp[2] + pp[3] + 1) >> 1; dst[2 * dst_stride + 3] = dst[1 * dst_stride + 1] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2; dst[1 * dst_stride + 2] = dst[0 * dst_stride + 0] = (pp[3] + pp[4] + 1) >> 1; dst[1 * dst_stride + 3] = dst[0 * dst_stride + 1] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2; dst[0 * dst_stride + 2] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2; dst[0 * dst_stride + 3] = (pp[5] + pp[6] * 2 + pp[7] + 2) >> 2; } break; case B_HU_PRED: { unsigned char *pp = Left; dst[0 * dst_stride + 0] = (pp[0] + pp[1] + 1) >> 1; dst[0 * dst_stride + 1] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2; dst[0 * dst_stride + 2] = dst[1 * dst_stride + 0] = (pp[1] + pp[2] + 1) >> 1; dst[0 * dst_stride + 3] = dst[1 * dst_stride + 1] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2; dst[1 * dst_stride + 2] = dst[2 * dst_stride + 0] = (pp[2] + pp[3] + 1) >> 1; dst[1 * dst_stride + 3] = dst[2 * dst_stride + 1] = (pp[2] + pp[3] * 2 + pp[3] + 2) >> 2; dst[2 * dst_stride + 2] = dst[2 * dst_stride + 3] = dst[3 * dst_stride + 0] = dst[3 * dst_stride + 1] = dst[3 * dst_stride + 2] = dst[3 * dst_stride + 3] = pp[3]; } break; } } /* 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 *x) { int dst_stride = x->dst.y_stride; unsigned char *above_right = x->dst.y_buffer - dst_stride + 16; unsigned int *src_ptr = (unsigned int *)above_right; unsigned int *dst_ptr0 = (unsigned int *)(above_right + 4 * dst_stride); unsigned int *dst_ptr1 = (unsigned int *)(above_right + 8 * dst_stride); unsigned int *dst_ptr2 = (unsigned int *)(above_right + 12 * dst_stride); *dst_ptr0 = *src_ptr; *dst_ptr1 = *src_ptr; *dst_ptr2 = *src_ptr; }