2a770828d8
BUG=3153 R=mflodman@webrtc.org Review URL: https://webrtc-codereview.appspot.com/11089005 git-svn-id: http://webrtc.googlecode.com/svn/trunk@5880 4adac7df-926f-26a2-2b94-8c16560cd09d
46 lines
1.2 KiB
C++
46 lines
1.2 KiB
C++
/*
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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 "webrtc/modules/video_processing/main/source/brighten.h"
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#include <stdlib.h>
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namespace webrtc {
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namespace VideoProcessing {
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int32_t Brighten(I420VideoFrame* frame, int delta) {
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assert(frame);
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if (frame->IsZeroSize()) {
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return VPM_PARAMETER_ERROR;
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}
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if (frame->width() <= 0 || frame->height() <= 0) {
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return VPM_PARAMETER_ERROR;
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}
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int num_pixels = frame->width() * frame->height();
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int look_up[256];
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for (int i = 0; i < 256; i++) {
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int val = i + delta;
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look_up[i] = ((((val < 0) ? 0 : val) > 255) ? 255 : val);
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}
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uint8_t* temp_ptr = frame->buffer(kYPlane);
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for (int i = 0; i < num_pixels; i++) {
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*temp_ptr = static_cast<uint8_t>(look_up[*temp_ptr]);
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temp_ptr++;
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}
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return VPM_OK;
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}
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} // namespace VideoProcessing
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} // namespace webrtc
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