51 lines
1.4 KiB
C++
51 lines
1.4 KiB
C++
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/*
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* Copyright (c) 2011 The WebRTC 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 "modules/video_processing/main/source/brighten.h"
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#include <cstdlib>
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#include "system_wrappers/interface/trace.h"
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namespace webrtc {
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WebRtc_Word32 Brighten(WebRtc_UWord8* frame,
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int width, int height, int delta) {
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if (frame == NULL) {
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WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceVideoPreocessing, -1,
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"Null frame pointer");
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return VPM_PARAMETER_ERROR;
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}
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if (width <= 0 || height <= 0) {
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WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceVideoPreocessing, -1,
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"Invalid frame size");
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return VPM_PARAMETER_ERROR;
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}
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int numPixels = width * height;
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int lookUp[256];
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for (int i = 0; i < 256; i++) {
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int val = i + delta;
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lookUp[i] = ((((val < 0) ? 0 : val) > 255) ? 255 : val);
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}
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WebRtc_UWord8* tempPtr = frame;
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for (int i = 0; i < numPixels; i++) {
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*tempPtr = static_cast<WebRtc_UWord8>(lookUp[*tempPtr]);
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tempPtr++;
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}
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return VPM_OK;
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}
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} // namespace webrtc
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