90 lines
3.2 KiB
C
90 lines
3.2 KiB
C
/*
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* Copyright (c) 2016 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/arm/highbd_idct_neon.h"
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#include "vpx_dsp/arm/idct_neon.h"
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#include "vpx_dsp/inv_txfm.h"
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// res is in reverse row order
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static INLINE void highbd_idct4x4_1_add_kernel2(uint16_t **dest,
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const int stride,
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const int16x8_t res,
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const int16x8_t max) {
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const uint16x4_t a0 = vld1_u16(*dest);
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const uint16x4_t a1 = vld1_u16(*dest + stride);
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const int16x8_t a = vreinterpretq_s16_u16(vcombine_u16(a1, a0));
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// Note: In some profile tests, res is quite close to +/-32767.
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// We use saturating addition.
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const int16x8_t b = vqaddq_s16(res, a);
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const int16x8_t c = vminq_s16(b, max);
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const uint16x8_t d = vqshluq_n_s16(c, 0);
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vst1_u16(*dest, vget_high_u16(d));
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*dest += stride;
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vst1_u16(*dest, vget_low_u16(d));
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*dest += stride;
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}
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void vpx_highbd_idct4x4_1_add_neon(const tran_low_t *input, uint16_t *dest,
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int stride, int bd) {
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const int16x8_t max = vdupq_n_s16((1 << bd) - 1);
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const tran_low_t out0 = HIGHBD_WRAPLOW(
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dct_const_round_shift(input[0] * (tran_high_t)cospi_16_64), bd);
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const tran_low_t out1 = HIGHBD_WRAPLOW(
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dct_const_round_shift(out0 * (tran_high_t)cospi_16_64), bd);
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const int16_t a1 = ROUND_POWER_OF_TWO(out1, 4);
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const int16x8_t dc = vdupq_n_s16(a1);
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highbd_idct4x4_1_add_kernel1(&dest, stride, dc, max);
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highbd_idct4x4_1_add_kernel1(&dest, stride, dc, max);
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}
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void vpx_highbd_idct4x4_16_add_neon(const tran_low_t *input, uint16_t *dest,
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int stride, int bd) {
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const int16x8_t max = vdupq_n_s16((1 << bd) - 1);
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int16x8_t a[2];
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int32x4_t c[4];
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c[0] = vld1q_s32(input);
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c[1] = vld1q_s32(input + 4);
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c[2] = vld1q_s32(input + 8);
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c[3] = vld1q_s32(input + 12);
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if (bd == 8) {
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// Rows
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a[0] = vcombine_s16(vmovn_s32(c[0]), vmovn_s32(c[1]));
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a[1] = vcombine_s16(vmovn_s32(c[2]), vmovn_s32(c[3]));
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transpose_idct4x4_16_bd8(a);
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// Columns
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a[1] = vcombine_s16(vget_high_s16(a[1]), vget_low_s16(a[1]));
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transpose_idct4x4_16_bd8(a);
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a[0] = vrshrq_n_s16(a[0], 4);
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a[1] = vrshrq_n_s16(a[1], 4);
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} else {
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const int32x4_t cospis = vld1q_s32(kCospi32);
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if (bd == 10) {
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idct4x4_16_kernel_bd10(cospis, c);
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idct4x4_16_kernel_bd10(cospis, c);
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} else {
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idct4x4_16_kernel_bd12(cospis, c);
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idct4x4_16_kernel_bd12(cospis, c);
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}
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a[0] = vcombine_s16(vqrshrn_n_s32(c[0], 4), vqrshrn_n_s32(c[1], 4));
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a[1] = vcombine_s16(vqrshrn_n_s32(c[3], 4), vqrshrn_n_s32(c[2], 4));
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}
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highbd_idct4x4_1_add_kernel1(&dest, stride, a[0], max);
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highbd_idct4x4_1_add_kernel2(&dest, stride, a[1], max);
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}
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