c2140b8af1
Changes 'The VP8 project' to 'The WebM project', for consistency with other webmproject.org repositories. Fixes issue #97. Change-Id: I37c13ed5fbdb9d334ceef71c6350e9febed9bbba
332 lines
10 KiB
C
332 lines
10 KiB
C
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "vpx_ports/config.h"
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#include "recon.h"
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#include "vpx_mem/vpx_mem.h"
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#include "reconintra.h"
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void vp8_predict_intra4x4(BLOCKD *x,
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int b_mode,
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unsigned char *predictor)
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{
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int i, r, c;
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unsigned char *Above = *(x->base_dst) + x->dst - x->dst_stride;
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unsigned char Left[4];
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unsigned char top_left = Above[-1];
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Left[0] = (*(x->base_dst))[x->dst - 1];
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Left[1] = (*(x->base_dst))[x->dst - 1 + x->dst_stride];
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Left[2] = (*(x->base_dst))[x->dst - 1 + 2 * x->dst_stride];
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Left[3] = (*(x->base_dst))[x->dst - 1 + 3 * x->dst_stride];
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switch (b_mode)
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{
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case B_DC_PRED:
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{
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int expected_dc = 0;
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for (i = 0; i < 4; i++)
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{
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expected_dc += Above[i];
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expected_dc += Left[i];
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}
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expected_dc = (expected_dc + 4) >> 3;
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for (r = 0; r < 4; r++)
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{
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for (c = 0; c < 4; c++)
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{
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predictor[c] = expected_dc;
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}
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predictor += 16;
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}
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}
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break;
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case B_TM_PRED:
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{
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// prediction similar to true_motion prediction
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for (r = 0; r < 4; r++)
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{
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for (c = 0; c < 4; c++)
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{
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int pred = Above[c] - top_left + Left[r];
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if (pred < 0)
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pred = 0;
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if (pred > 255)
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pred = 255;
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predictor[c] = pred;
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}
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predictor += 16;
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}
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}
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break;
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case B_VE_PRED:
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{
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unsigned int ap[4];
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ap[0] = (top_left + 2 * Above[0] + Above[1] + 2) >> 2;
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ap[1] = (Above[0] + 2 * Above[1] + Above[2] + 2) >> 2;
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ap[2] = (Above[1] + 2 * Above[2] + Above[3] + 2) >> 2;
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ap[3] = (Above[2] + 2 * Above[3] + Above[4] + 2) >> 2;
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for (r = 0; r < 4; r++)
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{
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for (c = 0; c < 4; c++)
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{
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predictor[c] = ap[c];
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}
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predictor += 16;
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}
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}
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break;
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case B_HE_PRED:
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{
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unsigned int lp[4];
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lp[0] = (top_left + 2 * Left[0] + Left[1] + 2) >> 2;
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lp[1] = (Left[0] + 2 * Left[1] + Left[2] + 2) >> 2;
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lp[2] = (Left[1] + 2 * Left[2] + Left[3] + 2) >> 2;
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lp[3] = (Left[2] + 2 * Left[3] + Left[3] + 2) >> 2;
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for (r = 0; r < 4; r++)
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{
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for (c = 0; c < 4; c++)
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{
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predictor[c] = lp[r];
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}
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predictor += 16;
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}
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}
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break;
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case B_LD_PRED:
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{
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unsigned char *ptr = Above;
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predictor[0 * 16 + 0] = (ptr[0] + ptr[1] * 2 + ptr[2] + 2) >> 2;
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predictor[0 * 16 + 1] =
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predictor[1 * 16 + 0] = (ptr[1] + ptr[2] * 2 + ptr[3] + 2) >> 2;
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predictor[0 * 16 + 2] =
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predictor[1 * 16 + 1] =
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predictor[2 * 16 + 0] = (ptr[2] + ptr[3] * 2 + ptr[4] + 2) >> 2;
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predictor[0 * 16 + 3] =
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predictor[1 * 16 + 2] =
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predictor[2 * 16 + 1] =
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predictor[3 * 16 + 0] = (ptr[3] + ptr[4] * 2 + ptr[5] + 2) >> 2;
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predictor[1 * 16 + 3] =
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predictor[2 * 16 + 2] =
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predictor[3 * 16 + 1] = (ptr[4] + ptr[5] * 2 + ptr[6] + 2) >> 2;
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predictor[2 * 16 + 3] =
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predictor[3 * 16 + 2] = (ptr[5] + ptr[6] * 2 + ptr[7] + 2) >> 2;
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predictor[3 * 16 + 3] = (ptr[6] + ptr[7] * 2 + ptr[7] + 2) >> 2;
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}
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break;
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case B_RD_PRED:
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{
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unsigned char pp[9];
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pp[0] = Left[3];
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pp[1] = Left[2];
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pp[2] = Left[1];
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pp[3] = Left[0];
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pp[4] = top_left;
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pp[5] = Above[0];
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pp[6] = Above[1];
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pp[7] = Above[2];
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pp[8] = Above[3];
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predictor[3 * 16 + 0] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2;
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predictor[3 * 16 + 1] =
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predictor[2 * 16 + 0] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2;
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predictor[3 * 16 + 2] =
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predictor[2 * 16 + 1] =
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predictor[1 * 16 + 0] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2;
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predictor[3 * 16 + 3] =
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predictor[2 * 16 + 2] =
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predictor[1 * 16 + 1] =
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predictor[0 * 16 + 0] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2;
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predictor[2 * 16 + 3] =
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predictor[1 * 16 + 2] =
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predictor[0 * 16 + 1] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2;
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predictor[1 * 16 + 3] =
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predictor[0 * 16 + 2] = (pp[5] + pp[6] * 2 + pp[7] + 2) >> 2;
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predictor[0 * 16 + 3] = (pp[6] + pp[7] * 2 + pp[8] + 2) >> 2;
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}
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break;
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case B_VR_PRED:
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{
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unsigned char pp[9];
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pp[0] = Left[3];
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pp[1] = Left[2];
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pp[2] = Left[1];
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pp[3] = Left[0];
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pp[4] = top_left;
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pp[5] = Above[0];
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pp[6] = Above[1];
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pp[7] = Above[2];
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pp[8] = Above[3];
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predictor[3 * 16 + 0] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2;
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predictor[2 * 16 + 0] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2;
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predictor[3 * 16 + 1] =
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predictor[1 * 16 + 0] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2;
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predictor[2 * 16 + 1] =
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predictor[0 * 16 + 0] = (pp[4] + pp[5] + 1) >> 1;
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predictor[3 * 16 + 2] =
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predictor[1 * 16 + 1] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2;
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predictor[2 * 16 + 2] =
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predictor[0 * 16 + 1] = (pp[5] + pp[6] + 1) >> 1;
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predictor[3 * 16 + 3] =
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predictor[1 * 16 + 2] = (pp[5] + pp[6] * 2 + pp[7] + 2) >> 2;
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predictor[2 * 16 + 3] =
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predictor[0 * 16 + 2] = (pp[6] + pp[7] + 1) >> 1;
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predictor[1 * 16 + 3] = (pp[6] + pp[7] * 2 + pp[8] + 2) >> 2;
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predictor[0 * 16 + 3] = (pp[7] + pp[8] + 1) >> 1;
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}
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break;
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case B_VL_PRED:
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{
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unsigned char *pp = Above;
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predictor[0 * 16 + 0] = (pp[0] + pp[1] + 1) >> 1;
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predictor[1 * 16 + 0] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2;
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predictor[2 * 16 + 0] =
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predictor[0 * 16 + 1] = (pp[1] + pp[2] + 1) >> 1;
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predictor[1 * 16 + 1] =
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predictor[3 * 16 + 0] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2;
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predictor[2 * 16 + 1] =
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predictor[0 * 16 + 2] = (pp[2] + pp[3] + 1) >> 1;
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predictor[3 * 16 + 1] =
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predictor[1 * 16 + 2] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2;
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predictor[0 * 16 + 3] =
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predictor[2 * 16 + 2] = (pp[3] + pp[4] + 1) >> 1;
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predictor[1 * 16 + 3] =
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predictor[3 * 16 + 2] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2;
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predictor[2 * 16 + 3] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2;
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predictor[3 * 16 + 3] = (pp[5] + pp[6] * 2 + pp[7] + 2) >> 2;
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}
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break;
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case B_HD_PRED:
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{
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unsigned char pp[9];
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pp[0] = Left[3];
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pp[1] = Left[2];
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pp[2] = Left[1];
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pp[3] = Left[0];
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pp[4] = top_left;
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pp[5] = Above[0];
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pp[6] = Above[1];
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pp[7] = Above[2];
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pp[8] = Above[3];
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predictor[3 * 16 + 0] = (pp[0] + pp[1] + 1) >> 1;
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predictor[3 * 16 + 1] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2;
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predictor[2 * 16 + 0] =
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predictor[3 * 16 + 2] = (pp[1] + pp[2] + 1) >> 1;
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predictor[2 * 16 + 1] =
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predictor[3 * 16 + 3] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2;
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predictor[2 * 16 + 2] =
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predictor[1 * 16 + 0] = (pp[2] + pp[3] + 1) >> 1;
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predictor[2 * 16 + 3] =
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predictor[1 * 16 + 1] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2;
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predictor[1 * 16 + 2] =
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predictor[0 * 16 + 0] = (pp[3] + pp[4] + 1) >> 1;
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predictor[1 * 16 + 3] =
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predictor[0 * 16 + 1] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2;
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predictor[0 * 16 + 2] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2;
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predictor[0 * 16 + 3] = (pp[5] + pp[6] * 2 + pp[7] + 2) >> 2;
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}
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break;
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case B_HU_PRED:
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{
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unsigned char *pp = Left;
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predictor[0 * 16 + 0] = (pp[0] + pp[1] + 1) >> 1;
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predictor[0 * 16 + 1] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2;
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predictor[0 * 16 + 2] =
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predictor[1 * 16 + 0] = (pp[1] + pp[2] + 1) >> 1;
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predictor[0 * 16 + 3] =
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predictor[1 * 16 + 1] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2;
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predictor[1 * 16 + 2] =
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predictor[2 * 16 + 0] = (pp[2] + pp[3] + 1) >> 1;
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predictor[1 * 16 + 3] =
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predictor[2 * 16 + 1] = (pp[2] + pp[3] * 2 + pp[3] + 2) >> 2;
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predictor[2 * 16 + 2] =
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predictor[2 * 16 + 3] =
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predictor[3 * 16 + 0] =
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predictor[3 * 16 + 1] =
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predictor[3 * 16 + 2] =
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predictor[3 * 16 + 3] = pp[3];
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}
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break;
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}
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}
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// copy 4 bytes from the above right down so that the 4x4 prediction modes using pixels above and
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// to the right prediction have filled in pixels to use.
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void vp8_intra_prediction_down_copy(MACROBLOCKD *x)
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{
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unsigned char *above_right = *(x->block[0].base_dst) + x->block[0].dst - x->block[0].dst_stride + 16;
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unsigned int *src_ptr = (unsigned int *)above_right;
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unsigned int *dst_ptr0 = (unsigned int *)(above_right + 4 * x->block[0].dst_stride);
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unsigned int *dst_ptr1 = (unsigned int *)(above_right + 8 * x->block[0].dst_stride);
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unsigned int *dst_ptr2 = (unsigned int *)(above_right + 12 * x->block[0].dst_stride);
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*dst_ptr0 = *src_ptr;
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*dst_ptr1 = *src_ptr;
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*dst_ptr2 = *src_ptr;
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}
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void vp8_recon_intra4x4mb(const vp8_recon_rtcd_vtable_t *rtcd, MACROBLOCKD *x)
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{
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int i;
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vp8_intra_prediction_down_copy(x);
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for (i = 0; i < 16; i++)
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{
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BLOCKD *b = &x->block[i];
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vp8_predict_intra4x4(b, x->block[i].bmi.mode, x->block[i].predictor);
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RECON_INVOKE(rtcd, recon)(b->predictor, b->diff, *(b->base_dst) + b->dst, b->dst_stride);
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}
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vp8_recon_intra_mbuv(rtcd, x);
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}
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