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1 /* | |
2 * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. | |
3 * | |
4 * Use of this source code is governed by a BSD-style license | |
5 * that can be found in the LICENSE file in the root of the source | |
6 * tree. An additional intellectual property rights grant can be found | |
7 * in the file PATENTS. All contributing project authors may | |
8 * be found in the AUTHORS file in the root of the source tree. | |
9 */ | |
10 | |
11 #include "webrtc/modules/video_processing/brighten.h" | |
12 | |
13 #include <stdlib.h> | |
14 | |
15 namespace webrtc { | |
16 namespace VideoProcessing { | |
17 | |
18 int32_t Brighten(VideoFrame* frame, int delta) { | |
19 assert(frame); | |
20 if (frame->IsZeroSize()) { | |
21 return VPM_PARAMETER_ERROR; | |
22 } | |
23 if (frame->width() <= 0 || frame->height() <= 0) { | |
24 return VPM_PARAMETER_ERROR; | |
25 } | |
26 | |
27 int num_pixels = frame->width() * frame->height(); | |
28 | |
29 int look_up[256]; | |
30 for (int i = 0; i < 256; i++) { | |
31 int val = i + delta; | |
32 look_up[i] = ((((val < 0) ? 0 : val) > 255) ? 255 : val); | |
33 } | |
34 | |
35 uint8_t* temp_ptr = frame->buffer(kYPlane); | |
36 | |
37 for (int i = 0; i < num_pixels; i++) { | |
38 *temp_ptr = static_cast<uint8_t>(look_up[*temp_ptr]); | |
39 temp_ptr++; | |
40 } | |
41 return VPM_OK; | |
42 } | |
43 | |
44 } // namespace VideoProcessing | |
45 } // namespace webrtc | |
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