1// Copyright (c) 2012 The Chromium Authors. All rights reserved. 2// Use of this source code is governed by a BSD-style license that can be 3// found in the LICENSE file. 4 5#ifndef REMOTING_BASE_UTIL_H_ 6#define REMOTING_BASE_UTIL_H_ 7 8#include <string> 9 10#include "media/base/video_frame.h" 11#include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h" 12 13namespace remoting { 14 15// Return a string that contains the current date formatted as 'MMDD/HHMMSS:'. 16std::string GetTimestampString(); 17 18// Calculate the offset of a specific pixel in an RGB32 buffer. 19int CalculateRGBOffset(int x, int y, int stride); 20 21// Calculate the offset of a specific pixel in a YV12/YUV420 buffer. Note that 22// the X and Y coordinates must both be even owing to the YV12 buffer layout. 23int CalculateYOffset(int x, int y, int stride); 24int CalculateUVOffset(int x, int y, int stride); 25 26// Convert and scale YUV to RGB32 on a specific rectangle. The source and 27// destination buffers are assumed to contain only |source_buffer_rect| and 28// |dest_buffer_rect| areas correspondingly. The scaling factor is determined 29// as ratio between |dest_size| and |source_size|. The target rectangle 30// |dect_rect| is specified in the destination coordinates. 31// 32// |source_buffer_rect| and |dest_buffer_rect| must fall entirely within 33// the source and destination dimensions, respectively. |dest_rect| must be 34// completely contained within the source and destinations buffers boundaries 35// including the case when scaling is requested. 36// 37// N.B. The top left corner coordinates of YUV buffer should have even X and Y 38// coordinates. 39void ConvertAndScaleYUVToRGB32Rect( 40 const uint8* source_yplane, 41 const uint8* source_uplane, 42 const uint8* source_vplane, 43 int source_ystride, 44 int source_uvstride, 45 const webrtc::DesktopSize& source_size, 46 const webrtc::DesktopRect& source_buffer_rect, 47 uint8* dest_buffer, 48 int dest_stride, 49 const webrtc::DesktopSize& dest_size, 50 const webrtc::DesktopRect& dest_buffer_rect, 51 const webrtc::DesktopRect& dest_rect); 52 53int RoundToTwosMultiple(int x); 54 55// Align the sides of the rectangle to multiples of 2 (expanding outwards). 56webrtc::DesktopRect AlignRect(const webrtc::DesktopRect& rect); 57 58// Scales the supplied rectangle from |in_size| coordinates to |out_size|. 59// If the result has non-integer coordinates then the smallest integer- 60// coordinate rectangle that wholly encloses it is returned. 61webrtc::DesktopRect ScaleRect(const webrtc::DesktopRect& rect, 62 const webrtc::DesktopSize& in_size, 63 const webrtc::DesktopSize& out_size); 64 65// Copy content of a rectangle in a RGB32 image. 66void CopyRGB32Rect(const uint8* source_buffer, 67 int source_stride, 68 const webrtc::DesktopRect& source_buffer_rect, 69 uint8* dest_buffer, 70 int dest_stride, 71 const webrtc::DesktopRect& dest_buffer_rect, 72 const webrtc::DesktopRect& dest_rect); 73 74// Replaces every occurrence of "\n" in a string by "\r\n". 75std::string ReplaceLfByCrLf(const std::string& in); 76 77// Replaces every occurrence of "\r\n" in a string by "\n". 78std::string ReplaceCrLfByLf(const std::string& in); 79 80// Checks if the given string is a valid UTF-8 string. 81bool StringIsUtf8(const char* data, size_t length); 82 83bool DoesRectContain(const webrtc::DesktopRect& a, 84 const webrtc::DesktopRect& b); 85 86} // namespace remoting 87 88#endif // REMOTING_BASE_UTIL_H_ 89