1 /* 2 * Copyright (c) 2013 The WebM project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #include "./vp9_rtcd.h" 12 #include "vp9/common/vp9_common.h" 13 #include "vpx_ports/mem.h" 14 15 void vp9_convolve8_neon(const uint8_t *src, ptrdiff_t src_stride, 16 uint8_t *dst, ptrdiff_t dst_stride, 17 const int16_t *filter_x, int x_step_q4, 18 const int16_t *filter_y, int y_step_q4, 19 int w, int h) { 20 /* Given our constraints: w <= 64, h <= 64, taps == 8 we can reduce the 21 * maximum buffer size to 64 * 64 + 7 (+ 1 to make it divisible by 4). 22 */ 23 DECLARE_ALIGNED_ARRAY(8, uint8_t, temp, 64 * 72); 24 25 // Account for the vertical phase needing 3 lines prior and 4 lines post 26 int intermediate_height = h + 7; 27 28 if (x_step_q4 != 16 || y_step_q4 != 16) 29 return vp9_convolve8_c(src, src_stride, 30 dst, dst_stride, 31 filter_x, x_step_q4, 32 filter_y, y_step_q4, 33 w, h); 34 35 /* Filter starting 3 lines back. The neon implementation will ignore the 36 * given height and filter a multiple of 4 lines. Since this goes in to 37 * the temp buffer which has lots of extra room and is subsequently discarded 38 * this is safe if somewhat less than ideal. 39 */ 40 vp9_convolve8_horiz_neon(src - src_stride * 3, src_stride, 41 temp, 64, 42 filter_x, x_step_q4, filter_y, y_step_q4, 43 w, intermediate_height); 44 45 /* Step into the temp buffer 3 lines to get the actual frame data */ 46 vp9_convolve8_vert_neon(temp + 64 * 3, 64, 47 dst, dst_stride, 48 filter_x, x_step_q4, filter_y, y_step_q4, 49 w, h); 50 } 51 52 void vp9_convolve8_avg_neon(const uint8_t *src, ptrdiff_t src_stride, 53 uint8_t *dst, ptrdiff_t dst_stride, 54 const int16_t *filter_x, int x_step_q4, 55 const int16_t *filter_y, int y_step_q4, 56 int w, int h) { 57 DECLARE_ALIGNED_ARRAY(8, uint8_t, temp, 64 * 72); 58 int intermediate_height = h + 7; 59 60 if (x_step_q4 != 16 || y_step_q4 != 16) 61 return vp9_convolve8_avg_c(src, src_stride, 62 dst, dst_stride, 63 filter_x, x_step_q4, 64 filter_y, y_step_q4, 65 w, h); 66 67 /* This implementation has the same issues as above. In addition, we only want 68 * to average the values after both passes. 69 */ 70 vp9_convolve8_horiz_neon(src - src_stride * 3, src_stride, 71 temp, 64, 72 filter_x, x_step_q4, filter_y, y_step_q4, 73 w, intermediate_height); 74 vp9_convolve8_avg_vert_neon(temp + 64 * 3, 75 64, dst, dst_stride, 76 filter_x, x_step_q4, filter_y, y_step_q4, 77 w, h); 78 } 79
