41 lines
1.2 KiB
C
41 lines
1.2 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 "./vpx_config.h"
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#include "./vpx_dsp_rtcd.h"
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#include "vpx/vpx_integer.h"
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#include "vpx_ports/mem.h"
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void vpx_plane_add_noise_c(uint8_t *start, char *noise,
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char blackclamp[16],
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char whiteclamp[16],
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char bothclamp[16],
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unsigned int width, unsigned int height, int pitch) {
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unsigned int i, j;
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for (i = 0; i < height; i++) {
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uint8_t *pos = start + i * pitch;
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char *ref = (char *)(noise + (rand() & 0xff)); // NOLINT
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for (j = 0; j < width; j++) {
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int v = pos[j];
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v = clamp(v - blackclamp[0], 0, 255);
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v = clamp(v + bothclamp[0], 0, 255);
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v = clamp(v - whiteclamp[0], 0, 255);
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pos[j] = v + ref[j];
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}
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}
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}
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