53 lines
1.8 KiB
C
53 lines
1.8 KiB
C
/*
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* Copyright (c) 2015 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <stdlib.h>
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#include "./macros_msa.h"
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void vpx_plane_add_noise_msa(uint8_t *start_ptr, const int8_t *noise,
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int blackclamp, int whiteclamp, int width,
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int height, int32_t pitch) {
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int i, j;
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v16u8 pos0, pos1, ref0, ref1;
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v16i8 black_clamp, white_clamp, both_clamp;
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black_clamp = __msa_fill_b(blackclamp);
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white_clamp = __msa_fill_b(whiteclamp);
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both_clamp = black_clamp + white_clamp;
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both_clamp = -both_clamp;
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for (i = 0; i < height / 2; ++i) {
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uint8_t *pos0_ptr = start_ptr + (2 * i) * pitch;
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const int8_t *ref0_ptr = noise + (rand() & 0xff);
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uint8_t *pos1_ptr = start_ptr + (2 * i + 1) * pitch;
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const int8_t *ref1_ptr = noise + (rand() & 0xff);
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for (j = width / 16; j--;) {
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pos0 = LD_UB(pos0_ptr);
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ref0 = LD_UB(ref0_ptr);
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pos1 = LD_UB(pos1_ptr);
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ref1 = LD_UB(ref1_ptr);
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pos0 = __msa_subsus_u_b(pos0, black_clamp);
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pos1 = __msa_subsus_u_b(pos1, black_clamp);
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pos0 = __msa_subsus_u_b(pos0, both_clamp);
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pos1 = __msa_subsus_u_b(pos1, both_clamp);
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pos0 = __msa_subsus_u_b(pos0, white_clamp);
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pos1 = __msa_subsus_u_b(pos1, white_clamp);
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pos0 += ref0;
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ST_UB(pos0, pos0_ptr);
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pos1 += ref1;
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ST_UB(pos1, pos1_ptr);
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pos0_ptr += 16;
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pos1_ptr += 16;
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ref0_ptr += 16;
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ref1_ptr += 16;
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}
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}
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}
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