65 lines
2.3 KiB
C
65 lines
2.3 KiB
C
/*
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* Copyright (c) 2014 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 <arm_neon.h>
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#include "./vpx_dsp_rtcd.h"
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#include "vpx_dsp/inv_txfm.h"
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static INLINE uint8x8_t create_dcd(const int16_t dc) {
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int16x8_t t = vdupq_n_s16(dc);
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return vqmovun_s16(t);
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}
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static INLINE void idct8x8_1_add_pos_kernel(uint8_t **dest, const int stride,
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const uint8x8_t res) {
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const uint8x8_t a = vld1_u8(*dest);
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const uint8x8_t b = vqadd_u8(a, res);
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vst1_u8(*dest, b);
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*dest += stride;
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}
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static INLINE void idct8x8_1_add_neg_kernel(uint8_t **dest, const int stride,
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const uint8x8_t res) {
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const uint8x8_t a = vld1_u8(*dest);
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const uint8x8_t b = vqsub_u8(a, res);
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vst1_u8(*dest, b);
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*dest += stride;
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}
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void vpx_idct8x8_1_add_neon(const tran_low_t *input, uint8_t *dest,
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int stride) {
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const int16_t out0 = WRAPLOW(dct_const_round_shift(input[0] * cospi_16_64));
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const int16_t out1 = WRAPLOW(dct_const_round_shift(out0 * cospi_16_64));
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const int16_t a1 = ROUND_POWER_OF_TWO(out1, 5);
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if (a1 >= 0) {
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const uint8x8_t dc = create_dcd(a1);
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idct8x8_1_add_pos_kernel(&dest, stride, dc);
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idct8x8_1_add_pos_kernel(&dest, stride, dc);
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idct8x8_1_add_pos_kernel(&dest, stride, dc);
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idct8x8_1_add_pos_kernel(&dest, stride, dc);
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idct8x8_1_add_pos_kernel(&dest, stride, dc);
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idct8x8_1_add_pos_kernel(&dest, stride, dc);
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idct8x8_1_add_pos_kernel(&dest, stride, dc);
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idct8x8_1_add_pos_kernel(&dest, stride, dc);
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} else {
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const uint8x8_t dc = create_dcd(-a1);
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idct8x8_1_add_neg_kernel(&dest, stride, dc);
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idct8x8_1_add_neg_kernel(&dest, stride, dc);
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idct8x8_1_add_neg_kernel(&dest, stride, dc);
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idct8x8_1_add_neg_kernel(&dest, stride, dc);
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idct8x8_1_add_neg_kernel(&dest, stride, dc);
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idct8x8_1_add_neg_kernel(&dest, stride, dc);
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idct8x8_1_add_neg_kernel(&dest, stride, dc);
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idct8x8_1_add_neg_kernel(&dest, stride, dc);
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}
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}
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