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comparison: media/webrtc/signaling/src/common/YuvStamper.h
media/webrtc/signaling/src/common/YuvStamper.h
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- 6474c204b198
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| -1:000000000000 | 0:7c074aa7cceb |
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| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this file, | |
| 3 * You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 #ifndef YUV_STAMPER_H_ | |
| 6 #define YUV_STAMPER_H_ | |
| 7 | |
| 8 #include "nptypes.h" | |
| 9 | |
| 10 namespace mozilla { | |
| 11 | |
| 12 class | |
| 13 YuvStamper { | |
| 14 public: | |
| 15 bool WriteDigits(uint32_t value); | |
| 16 | |
| 17 template<typename T> | |
| 18 static bool Write(uint32_t width, uint32_t height, uint32_t stride, | |
| 19 unsigned char *pYData, const T& value, | |
| 20 uint32_t x=0, uint32_t y=0) | |
| 21 { | |
| 22 YuvStamper stamper(pYData, width, height, stride, | |
| 23 x, y, | |
| 24 (sDigitWidth + sInterDigit) * sPixelSize, | |
| 25 (sDigitHeight + sInterLine) * sPixelSize); | |
| 26 return stamper.WriteDigits(value); | |
| 27 } | |
| 28 | |
| 29 static bool Encode(uint32_t width, uint32_t height, uint32_t stride, | |
| 30 unsigned char* pYData, unsigned char* pMsg, size_t msg_len, | |
| 31 uint32_t x = 0, uint32_t y = 0); | |
| 32 | |
| 33 static bool Decode(uint32_t width, uint32_t height, uint32_t stride, | |
| 34 unsigned char* pYData, unsigned char* pMsg, size_t msg_len, | |
| 35 uint32_t x = 0, uint32_t y = 0); | |
| 36 | |
| 37 private: | |
| 38 YuvStamper(unsigned char* pYData, | |
| 39 uint32_t width, uint32_t height, uint32_t stride, | |
| 40 uint32_t x, uint32_t y, | |
| 41 unsigned char symbol_width, unsigned char symbol_height); | |
| 42 | |
| 43 bool WriteDigit(unsigned char digit); | |
| 44 void WritePixel(unsigned char* data, uint32_t x, uint32_t y); | |
| 45 uint32_t Capacity(); | |
| 46 bool AdvanceCursor(); | |
| 47 bool WriteBit(bool one); | |
| 48 bool Write8(unsigned char value); | |
| 49 bool ReadBit(unsigned char &value); | |
| 50 bool Read8(unsigned char &bit); | |
| 51 | |
| 52 const static unsigned char sPixelSize = 3; | |
| 53 const static unsigned char sDigitWidth = 6; | |
| 54 const static unsigned char sDigitHeight = 7; | |
| 55 const static unsigned char sInterDigit = 1; | |
| 56 const static unsigned char sInterLine = 1; | |
| 57 const static uint32_t sBitSize = 4; | |
| 58 const static uint32_t sBitThreshold = 60; | |
| 59 const static unsigned char sYOn = 0x80; | |
| 60 const static unsigned char sYOff = 0; | |
| 61 const static unsigned char sLumaThreshold = 96; | |
| 62 const static unsigned char sLumaMin = 16; | |
| 63 const static unsigned char sLumaMax = 235; | |
| 64 | |
| 65 unsigned char* pYData; | |
| 66 uint32_t mStride; | |
| 67 uint32_t mWidth; | |
| 68 uint32_t mHeight; | |
| 69 unsigned char mSymbolWidth; | |
| 70 unsigned char mSymbolHeight; | |
| 71 | |
| 72 struct Cursor { | |
| 73 Cursor(uint32_t x, uint32_t y): | |
| 74 x(x), y(y) {} | |
| 75 uint32_t x; | |
| 76 uint32_t y; | |
| 77 } mCursor; | |
| 78 }; | |
| 79 | |
| 80 } | |
| 81 | |
| 82 #endif | |
| 83 |
