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comparison: media/libvpx/vp9/common/arm/neon/vp9_convolve_neon.c
media/libvpx/vp9/common/arm/neon/vp9_convolve_neon.c
- branch
- TOR_BUG_9701
- changeset 10
- ac0c01689b40
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| -1:000000000000 | 0:b9edeba6554f |
|---|---|
| 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 } |
