From 6bf0a5cb5034a7e684dcc3500e841785237ce2dd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 19:32:43 +0200 Subject: Adding upstream version 1:115.7.0. Signed-off-by: Daniel Baumann --- dom/media/webrtc/common/YuvStamper.h | 77 ++++++++++++++++++++++++++++++++++++ 1 file changed, 77 insertions(+) create mode 100644 dom/media/webrtc/common/YuvStamper.h (limited to 'dom/media/webrtc/common/YuvStamper.h') diff --git a/dom/media/webrtc/common/YuvStamper.h b/dom/media/webrtc/common/YuvStamper.h new file mode 100644 index 0000000000..f355055cd9 --- /dev/null +++ b/dom/media/webrtc/common/YuvStamper.h @@ -0,0 +1,77 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this file, + * You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef YUV_STAMPER_H_ +#define YUV_STAMPER_H_ + +#include + +namespace mozilla { + +class YuvStamper { + public: + bool WriteDigits(uint32_t value); + + template + static bool Write(uint32_t width, uint32_t height, uint32_t stride, + unsigned char* pYData, const T& value, uint32_t x = 0, + uint32_t y = 0) { + YuvStamper stamper(pYData, width, height, stride, x, y, + (sDigitWidth + sInterDigit) * sPixelSize, + (sDigitHeight + sInterLine) * sPixelSize); + return stamper.WriteDigits(value); + } + + static bool Encode(uint32_t width, uint32_t height, uint32_t stride, + unsigned char* pYData, unsigned char* pMsg, size_t msg_len, + uint32_t x = 0, uint32_t y = 0); + + static bool Decode(uint32_t width, uint32_t height, uint32_t stride, + unsigned char* pYData, unsigned char* pMsg, size_t msg_len, + uint32_t x = 0, uint32_t y = 0); + + private: + YuvStamper(unsigned char* pYData, uint32_t width, uint32_t height, + uint32_t stride, uint32_t x, uint32_t y, + unsigned char symbol_width, unsigned char symbol_height); + + bool WriteDigit(unsigned char digit); + void WritePixel(unsigned char* data, uint32_t x, uint32_t y); + uint32_t Capacity(); + bool AdvanceCursor(); + bool WriteBit(bool one); + bool Write8(unsigned char value); + bool ReadBit(unsigned char& value); + bool Read8(unsigned char& bit); + + const static unsigned char sPixelSize = 3; + const static unsigned char sDigitWidth = 6; + const static unsigned char sDigitHeight = 7; + const static unsigned char sInterDigit = 1; + const static unsigned char sInterLine = 1; + const static uint32_t sBitSize = 4; + const static uint32_t sBitThreshold = 60; + const static unsigned char sYOn = 0x80; + const static unsigned char sYOff = 0; + const static unsigned char sLumaThreshold = 96; + const static unsigned char sLumaMin = 16; + const static unsigned char sLumaMax = 235; + + unsigned char* pYData; + uint32_t mStride; + uint32_t mWidth; + uint32_t mHeight; + unsigned char mSymbolWidth; + unsigned char mSymbolHeight; + + struct Cursor { + Cursor(uint32_t x, uint32_t y) : x(x), y(y) {} + uint32_t x; + uint32_t y; + } mCursor; +}; + +} // namespace mozilla + +#endif -- cgit v1.2.3