| /* |
| * 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 "color_enhancement.h" |
| #include "color_enhancement_private.h" |
| #include "trace.h" |
| #include <cstdlib> // NULL |
| |
| namespace webrtc { |
| |
| namespace VideoProcessing |
| { |
| WebRtc_Word32 |
| ColorEnhancement(WebRtc_UWord8* frame, |
| const WebRtc_UWord32 width, |
| const WebRtc_UWord32 height) |
| { |
| // pointers to U and V color pixels |
| WebRtc_UWord8* ptrU; |
| WebRtc_UWord8* ptrV; |
| WebRtc_UWord8 tempChroma; |
| const WebRtc_UWord32 numPixels = width * height; |
| |
| |
| if (frame == NULL) |
| { |
| WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceVideoPreocessing, -1, "Null frame pointer"); |
| return VPM_GENERAL_ERROR; |
| } |
| |
| if (width == 0 || height == 0) |
| { |
| WEBRTC_TRACE(webrtc::kTraceError, webrtc::kTraceVideoPreocessing, -1, "Invalid frame size"); |
| return VPM_GENERAL_ERROR; |
| } |
| |
| // set pointers to first U and V pixels |
| |
| // stream format: |
| // | numPixels bytes luminance | numPixels/4 bytes chroma U | numPixels/4 chroma V | |
| |
| ptrU = frame + numPixels; // skip luminance |
| ptrV = ptrU + (numPixels>>2); |
| |
| // loop through all chrominance pixels and modify color |
| for (WebRtc_UWord32 ix = 0; ix < (numPixels>>2); ix++) |
| { |
| tempChroma = colorTable[*ptrU][*ptrV]; |
| *ptrV = colorTable[*ptrV][*ptrU]; |
| *ptrU = tempChroma; |
| |
| // increment pointers |
| ptrU++; |
| ptrV++; |
| } |
| return VPM_OK; |
| } |
| |
| } //namespace |
| |
| } //namespace webrtc |