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/*
* 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 "./vpx_config.h"
static INLINE void vp8_loop_filter_simple_horizontal_edge_neon(
unsigned char *s,
int p,
const unsigned char *blimit) {
uint8_t *sp;
uint8x16_t qblimit, q0u8;
uint8x16_t q5u8, q6u8, q7u8, q8u8, q9u8, q10u8, q14u8, q15u8;
int16x8_t q2s16, q3s16, q13s16;
int8x8_t d8s8, d9s8;
int8x16_t q2s8, q3s8, q4s8, q10s8, q11s8, q14s8;
qblimit = vdupq_n_u8(*blimit);
sp = s - (p << 1);
q5u8 = vld1q_u8(sp);
sp += p;
q6u8 = vld1q_u8(sp);
sp += p;
q7u8 = vld1q_u8(sp);
sp += p;
q8u8 = vld1q_u8(sp);
q15u8 = vabdq_u8(q6u8, q7u8);
q14u8 = vabdq_u8(q5u8, q8u8);
q15u8 = vqaddq_u8(q15u8, q15u8);
q14u8 = vshrq_n_u8(q14u8, 1);
q0u8 = vdupq_n_u8(0x80);
q13s16 = vdupq_n_s16(3);
q15u8 = vqaddq_u8(q15u8, q14u8);
q5u8 = veorq_u8(q5u8, q0u8);
q6u8 = veorq_u8(q6u8, q0u8);
q7u8 = veorq_u8(q7u8, q0u8);
q8u8 = veorq_u8(q8u8, q0u8);
q15u8 = vcgeq_u8(qblimit, q15u8);
q2s16 = vsubl_s8(vget_low_s8(vreinterpretq_s8_u8(q7u8)),
vget_low_s8(vreinterpretq_s8_u8(q6u8)));
q3s16 = vsubl_s8(vget_high_s8(vreinterpretq_s8_u8(q7u8)),
vget_high_s8(vreinterpretq_s8_u8(q6u8)));
q4s8 = vqsubq_s8(vreinterpretq_s8_u8(q5u8),
vreinterpretq_s8_u8(q8u8));
q2s16 = vmulq_s16(q2s16, q13s16);
q3s16 = vmulq_s16(q3s16, q13s16);
q10u8 = vdupq_n_u8(3);
q9u8 = vdupq_n_u8(4);
q2s16 = vaddw_s8(q2s16, vget_low_s8(q4s8));
q3s16 = vaddw_s8(q3s16, vget_high_s8(q4s8));
d8s8 = vqmovn_s16(q2s16);
d9s8 = vqmovn_s16(q3s16);
q4s8 = vcombine_s8(d8s8, d9s8);
q14s8 = vandq_s8(q4s8, vreinterpretq_s8_u8(q15u8));
q2s8 = vqaddq_s8(q14s8, vreinterpretq_s8_u8(q10u8));
q3s8 = vqaddq_s8(q14s8, vreinterpretq_s8_u8(q9u8));
q2s8 = vshrq_n_s8(q2s8, 3);
q3s8 = vshrq_n_s8(q3s8, 3);
q11s8 = vqaddq_s8(vreinterpretq_s8_u8(q6u8), q2s8);
q10s8 = vqsubq_s8(vreinterpretq_s8_u8(q7u8), q3s8);
q6u8 = veorq_u8(vreinterpretq_u8_s8(q11s8), q0u8);
q7u8 = veorq_u8(vreinterpretq_u8_s8(q10s8), q0u8);
vst1q_u8(s, q7u8);
s -= p;
vst1q_u8(s, q6u8);
return;
}
void vp8_loop_filter_bhs_neon(
unsigned char *y_ptr,
int y_stride,
const unsigned char *blimit) {
y_ptr += y_stride * 4;
vp8_loop_filter_simple_horizontal_edge_neon(y_ptr, y_stride, blimit);
y_ptr += y_stride * 4;
vp8_loop_filter_simple_horizontal_edge_neon(y_ptr, y_stride, blimit);
y_ptr += y_stride * 4;
vp8_loop_filter_simple_horizontal_edge_neon(y_ptr, y_stride, blimit);
return;
}
void vp8_loop_filter_mbhs_neon(
unsigned char *y_ptr,
int y_stride,
const unsigned char *blimit) {
vp8_loop_filter_simple_horizontal_edge_neon(y_ptr, y_stride, blimit);
return;
}
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