From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001 From: "Matt A. Tobin" Date: Fri, 2 Feb 2018 04:16:08 -0500 Subject: Add m-esr52 at 52.6.0 --- media/webrtc/signaling/src/common/YuvStamper.h | 83 ++++++++++++++++++++++++++ 1 file changed, 83 insertions(+) create mode 100644 media/webrtc/signaling/src/common/YuvStamper.h (limited to 'media/webrtc/signaling/src/common/YuvStamper.h') diff --git a/media/webrtc/signaling/src/common/YuvStamper.h b/media/webrtc/signaling/src/common/YuvStamper.h new file mode 100644 index 000000000..fb2d6e466 --- /dev/null +++ b/media/webrtc/signaling/src/common/YuvStamper.h @@ -0,0 +1,83 @@ +/* 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 "nptypes.h" + +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; +}; + +} + +#endif + -- cgit v1.2.3