1 /*
2 * Copyright (c) 2015 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 <stdlib.h>
12 #include "./macros_msa.h"
13
vpx_plane_add_noise_msa(uint8_t * start_ptr,const int8_t * noise,int blackclamp,int whiteclamp,int width,int height,int32_t pitch)14 void vpx_plane_add_noise_msa(uint8_t *start_ptr, const int8_t *noise,
15 int blackclamp, int whiteclamp, int width,
16 int height, int32_t pitch) {
17 int i, j;
18 v16u8 pos0, pos1, ref0, ref1;
19 v16i8 black_clamp, white_clamp, both_clamp;
20
21 black_clamp = __msa_fill_b(blackclamp);
22 white_clamp = __msa_fill_b(whiteclamp);
23 both_clamp = black_clamp + white_clamp;
24 both_clamp = -both_clamp;
25
26 for (i = 0; i < height / 2; ++i) {
27 uint8_t *pos0_ptr = start_ptr + (2 * i) * pitch;
28 const int8_t *ref0_ptr = noise + (rand() & 0xff);
29 uint8_t *pos1_ptr = start_ptr + (2 * i + 1) * pitch;
30 const int8_t *ref1_ptr = noise + (rand() & 0xff);
31 for (j = width / 16; j--;) {
32 pos0 = LD_UB(pos0_ptr);
33 ref0 = LD_UB(ref0_ptr);
34 pos1 = LD_UB(pos1_ptr);
35 ref1 = LD_UB(ref1_ptr);
36 pos0 = __msa_subsus_u_b(pos0, black_clamp);
37 pos1 = __msa_subsus_u_b(pos1, black_clamp);
38 pos0 = __msa_subsus_u_b(pos0, both_clamp);
39 pos1 = __msa_subsus_u_b(pos1, both_clamp);
40 pos0 = __msa_subsus_u_b(pos0, white_clamp);
41 pos1 = __msa_subsus_u_b(pos1, white_clamp);
42 pos0 += ref0;
43 ST_UB(pos0, pos0_ptr);
44 pos1 += ref1;
45 ST_UB(pos1, pos1_ptr);
46 pos0_ptr += 16;
47 pos1_ptr += 16;
48 ref0_ptr += 16;
49 ref1_ptr += 16;
50 }
51 }
52 }
53