ref: a3df343cda2b6f3d554138ce5dae831e2f946d0c
dir: /vp8/common/arm/neon/reconintra_neon.c/
/*
* 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 <arm_neon.h>
#include "vp8/common/blockd.h"
void vp8_build_intra_predictors_mby_s_neon(MACROBLOCKD *x,
unsigned char * yabove_row,
unsigned char * yleft,
int left_stride,
unsigned char * ypred_ptr,
int y_stride) {
const int mode = x->mode_info_context->mbmi.mode;
int i;
switch (mode) {
case DC_PRED:
{
int shift = x->up_available + x->left_available;
uint8x16_t v_expected_dc = vdupq_n_u8(128);
if (shift) {
unsigned int average = 0;
int expected_dc;
if (x->up_available) {
const uint8x16_t v_above = vld1q_u8(yabove_row);
const uint16x8_t a = vpaddlq_u8(v_above);
const uint32x4_t b = vpaddlq_u16(a);
const uint64x2_t c = vpaddlq_u32(b);
const uint32x2_t d = vadd_u32(vreinterpret_u32_u64(vget_low_u64(c)),
vreinterpret_u32_u64(vget_high_u64(c)));
average = vget_lane_u32(d, 0);
}
if (x->left_available) {
for (i = 0; i < 16; ++i) {
average += yleft[0];
yleft += left_stride;
}
}
shift += 3;
expected_dc = (average + (1 << (shift - 1))) >> shift;
v_expected_dc = vmovq_n_u8((uint8_t)expected_dc);
}
for (i = 0; i < 16; ++i) {
vst1q_u8(ypred_ptr, v_expected_dc);
ypred_ptr += y_stride;
}
}
break;
case V_PRED:
{
const uint8x16_t v_above = vld1q_u8(yabove_row);
for (i = 0; i < 16; ++i) {
vst1q_u8(ypred_ptr, v_above);
ypred_ptr += y_stride;
}
}
break;
case H_PRED:
{
for (i = 0; i < 16; ++i) {
const uint8x16_t v_yleft = vmovq_n_u8((uint8_t)yleft[0]);
yleft += left_stride;
vst1q_u8(ypred_ptr, v_yleft);
ypred_ptr += y_stride;
}
}
break;
case TM_PRED:
{
const uint16x8_t v_ytop_left = vmovq_n_u16((int16_t)yabove_row[-1]);
const uint8x16_t v_above = vld1q_u8(yabove_row);
for (i = 0; i < 16; ++i) {
const uint8x8_t v_yleft = vmov_n_u8((int8_t)yleft[0]);
const uint16x8_t a_lo = vaddl_u8(vget_low_u8(v_above), v_yleft);
const uint16x8_t a_hi = vaddl_u8(vget_high_u8(v_above), v_yleft);
const int16x8_t b_lo = vsubq_s16(vreinterpretq_s16_u16(a_lo),
vreinterpretq_s16_u16(v_ytop_left));
const int16x8_t b_hi = vsubq_s16(vreinterpretq_s16_u16(a_hi),
vreinterpretq_s16_u16(v_ytop_left));
const uint8x8_t pred_lo = vqmovun_s16(b_lo);
const uint8x8_t pred_hi = vqmovun_s16(b_hi);
vst1q_u8(ypred_ptr, vcombine_u8(pred_lo, pred_hi));
ypred_ptr += y_stride;
yleft += left_stride;
}
}
break;
}
}
void vp8_build_intra_predictors_mbuv_s_neon(MACROBLOCKD *x,
unsigned char * uabove_row,
unsigned char * vabove_row,
unsigned char * uleft,
unsigned char * vleft,
int left_stride,
unsigned char * upred_ptr,
unsigned char * vpred_ptr,
int pred_stride) {
const int mode = x->mode_info_context->mbmi.uv_mode;
int i;
switch (mode) {
case DC_PRED:
{
int shift = x->up_available + x->left_available;
uint8x8_t v_expected_udc = vdup_n_u8(128);
uint8x8_t v_expected_vdc = vdup_n_u8(128);
if (shift) {
unsigned int average_u = 0;
unsigned int average_v = 0;
int expected_udc;
int expected_vdc;
if (x->up_available) {
const uint8x8_t v_uabove = vld1_u8(uabove_row);
const uint8x8_t v_vabove = vld1_u8(vabove_row);
const uint16x8_t a = vpaddlq_u8(vcombine_u8(v_uabove, v_vabove));
const uint32x4_t b = vpaddlq_u16(a);
const uint64x2_t c = vpaddlq_u32(b);
average_u = vgetq_lane_u32(vreinterpretq_u32_u64((c)), 0);
average_v = vgetq_lane_u32(vreinterpretq_u32_u64((c)), 2);
}
if (x->left_available) {
for (i = 0; i < 8; ++i) {
average_u += uleft[0];
uleft += left_stride;
average_v += vleft[0];
vleft += left_stride;
}
}
shift += 2;
expected_udc = (average_u + (1 << (shift - 1))) >> shift;
expected_vdc = (average_v + (1 << (shift - 1))) >> shift;
v_expected_udc = vmov_n_u8((uint8_t)expected_udc);
v_expected_vdc = vmov_n_u8((uint8_t)expected_vdc);
}
for (i = 0; i < 8; ++i) {
vst1_u8(upred_ptr, v_expected_udc);
upred_ptr += pred_stride;
vst1_u8(vpred_ptr, v_expected_vdc);
vpred_ptr += pred_stride;
}
}
break;
case V_PRED:
{
const uint8x8_t v_uabove = vld1_u8(uabove_row);
const uint8x8_t v_vabove = vld1_u8(vabove_row);
for (i = 0; i < 8; ++i) {
vst1_u8(upred_ptr, v_uabove);
upred_ptr += pred_stride;
vst1_u8(vpred_ptr, v_vabove);
vpred_ptr += pred_stride;
}
}
break;
case H_PRED:
{
for (i = 0; i < 8; ++i) {
const uint8x8_t v_uleft = vmov_n_u8((uint8_t)uleft[0]);
const uint8x8_t v_vleft = vmov_n_u8((uint8_t)vleft[0]);
uleft += left_stride;
vleft += left_stride;
vst1_u8(upred_ptr, v_uleft);
upred_ptr += pred_stride;
vst1_u8(vpred_ptr, v_vleft);
vpred_ptr += pred_stride;
}
}
break;
case TM_PRED:
{
const uint16x8_t v_utop_left = vmovq_n_u16((int16_t)uabove_row[-1]);
const uint16x8_t v_vtop_left = vmovq_n_u16((int16_t)vabove_row[-1]);
const uint8x8_t v_uabove = vld1_u8(uabove_row);
const uint8x8_t v_vabove = vld1_u8(vabove_row);
for (i = 0; i < 8; ++i) {
const uint8x8_t v_uleft = vmov_n_u8((int8_t)uleft[0]);
const uint8x8_t v_vleft = vmov_n_u8((int8_t)vleft[0]);
const uint16x8_t a_u = vaddl_u8(v_uabove, v_uleft);
const uint16x8_t a_v = vaddl_u8(v_vabove, v_vleft);
const int16x8_t b_u = vsubq_s16(vreinterpretq_s16_u16(a_u),
vreinterpretq_s16_u16(v_utop_left));
const int16x8_t b_v = vsubq_s16(vreinterpretq_s16_u16(a_v),
vreinterpretq_s16_u16(v_vtop_left));
const uint8x8_t pred_u = vqmovun_s16(b_u);
const uint8x8_t pred_v = vqmovun_s16(b_v);
vst1_u8(upred_ptr, pred_u);
vst1_u8(vpred_ptr, pred_v);
upred_ptr += pred_stride;
vpred_ptr += pred_stride;
uleft += left_stride;
vleft += left_stride;
}
}
break;
}
}