| /* |
| * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #include "webrtc/modules/video_processing/main/source/brighten.h" |
| |
| #include <stdlib.h> |
| |
| namespace webrtc { |
| namespace VideoProcessing { |
| |
| int32_t Brighten(VideoFrame* frame, int delta) { |
| assert(frame); |
| if (frame->IsZeroSize()) { |
| return VPM_PARAMETER_ERROR; |
| } |
| if (frame->width() <= 0 || frame->height() <= 0) { |
| return VPM_PARAMETER_ERROR; |
| } |
| |
| int num_pixels = frame->width() * frame->height(); |
| |
| int look_up[256]; |
| for (int i = 0; i < 256; i++) { |
| int val = i + delta; |
| look_up[i] = ((((val < 0) ? 0 : val) > 255) ? 255 : val); |
| } |
| |
| uint8_t* temp_ptr = frame->buffer(kYPlane); |
| |
| for (int i = 0; i < num_pixels; i++) { |
| *temp_ptr = static_cast<uint8_t>(look_up[*temp_ptr]); |
| temp_ptr++; |
| } |
| return VPM_OK; |
| } |
| |
| } // namespace VideoProcessing |
| } // namespace webrtc |