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 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
