ref: 9ca9c12dbdea516f46e1e08203d7cc1378eb171b
dir: /vpx_dsp/arm/highbd_vpx_convolve_neon.c/
/* * Copyright (c) 2016 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 "./vpx_dsp_rtcd.h" #include "vpx_dsp/vpx_dsp_common.h" #include "vpx_dsp/vpx_filter.h" #include "vpx_ports/mem.h" void vpx_highbd_convolve8_neon(const uint16_t *src, ptrdiff_t src_stride, uint16_t *dst, ptrdiff_t dst_stride, const InterpKernel *filter, int x0_q4, int x_step_q4, int y0_q4, int y_step_q4, int w, int h, int bd) { // + 1 to make it divisible by 4 uint16_t temp[64 * 136]; const int intermediate_height = (((h - 1) * y_step_q4 + y0_q4) >> SUBPEL_BITS) + SUBPEL_TAPS; /* Filter starting 3 lines back. The neon implementation will ignore the given * height and filter a multiple of 4 lines. Since this goes in to the temp * buffer which has lots of extra room and is subsequently discarded this is * safe if somewhat less than ideal. */ vpx_highbd_convolve8_horiz_neon(src - src_stride * 3, src_stride, temp, w, filter, x0_q4, x_step_q4, y0_q4, y_step_q4, w, intermediate_height, bd); /* Step into the temp buffer 3 lines to get the actual frame data */ vpx_highbd_convolve8_vert_neon(temp + w * 3, w, dst, dst_stride, filter, x0_q4, x_step_q4, y0_q4, y_step_q4, w, h, bd); } void vpx_highbd_convolve8_avg_neon(const uint16_t *src, ptrdiff_t src_stride, uint16_t *dst, ptrdiff_t dst_stride, const InterpKernel *filter, int x0_q4, int x_step_q4, int y0_q4, int y_step_q4, int w, int h, int bd) { // + 1 to make it divisible by 4 uint16_t temp[64 * 136]; const int intermediate_height = (((h - 1) * y_step_q4 + y0_q4) >> SUBPEL_BITS) + SUBPEL_TAPS; /* This implementation has the same issues as above. In addition, we only want * to average the values after both passes. */ vpx_highbd_convolve8_horiz_neon(src - src_stride * 3, src_stride, temp, w, filter, x0_q4, x_step_q4, y0_q4, y_step_q4, w, intermediate_height, bd); vpx_highbd_convolve8_avg_vert_neon(temp + w * 3, w, dst, dst_stride, filter, x0_q4, x_step_q4, y0_q4, y_step_q4, w, h, bd); }