ref: bd863314d01a3024e94934d9a6418a937d9f2ec4
dir: /vp9/encoder/arm/neon/vp9_dct_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 "./vp9_rtcd.h"
#include "./vpx_dsp_rtcd.h"
#include "./vpx_config.h"
#include "vp9/common/vp9_blockd.h"
#include "vpx_dsp/txfm_common.h"
void vp9_fdct8x8_1_neon(const int16_t *input, int16_t *output, int stride) {
int r;
int16x8_t sum = vld1q_s16(&input[0]);
for (r = 1; r < 8; ++r) {
const int16x8_t input_00 = vld1q_s16(&input[r * stride]);
sum = vaddq_s16(sum, input_00);
}
{
const int32x4_t a = vpaddlq_s16(sum);
const int64x2_t b = vpaddlq_s32(a);
const int32x2_t c = vadd_s32(vreinterpret_s32_s64(vget_low_s64(b)),
vreinterpret_s32_s64(vget_high_s64(b)));
output[0] = vget_lane_s16(vreinterpret_s16_s32(c), 0);
output[1] = 0;
}
}
void vp9_fdct8x8_quant_neon(const int16_t *input, int stride,
int16_t* coeff_ptr, intptr_t n_coeffs,
int skip_block, const int16_t* zbin_ptr,
const int16_t* round_ptr, const int16_t* quant_ptr,
const int16_t* quant_shift_ptr,
int16_t* qcoeff_ptr, int16_t* dqcoeff_ptr,
const int16_t* dequant_ptr, uint16_t* eob_ptr,
const int16_t* scan_ptr,
const int16_t* iscan_ptr) {
int16_t temp_buffer[64];
(void)coeff_ptr;
vp9_fdct8x8_neon(input, temp_buffer, stride);
vp9_quantize_fp_neon(temp_buffer, n_coeffs, skip_block, zbin_ptr, round_ptr,
quant_ptr, quant_shift_ptr, qcoeff_ptr, dqcoeff_ptr,
dequant_ptr, eob_ptr, scan_ptr, iscan_ptr);
}