1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/webrtc/signaling/src/common/YuvStamper.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,83 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this file,
1.6 + * You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +#ifndef YUV_STAMPER_H_
1.9 +#define YUV_STAMPER_H_
1.10 +
1.11 +#include "nptypes.h"
1.12 +
1.13 +namespace mozilla {
1.14 +
1.15 +class
1.16 +YuvStamper {
1.17 +public:
1.18 + bool WriteDigits(uint32_t value);
1.19 +
1.20 + template<typename T>
1.21 + static bool Write(uint32_t width, uint32_t height, uint32_t stride,
1.22 + unsigned char *pYData, const T& value,
1.23 + uint32_t x=0, uint32_t y=0)
1.24 + {
1.25 + YuvStamper stamper(pYData, width, height, stride,
1.26 + x, y,
1.27 + (sDigitWidth + sInterDigit) * sPixelSize,
1.28 + (sDigitHeight + sInterLine) * sPixelSize);
1.29 + return stamper.WriteDigits(value);
1.30 + }
1.31 +
1.32 + static bool Encode(uint32_t width, uint32_t height, uint32_t stride,
1.33 + unsigned char* pYData, unsigned char* pMsg, size_t msg_len,
1.34 + uint32_t x = 0, uint32_t y = 0);
1.35 +
1.36 + static bool Decode(uint32_t width, uint32_t height, uint32_t stride,
1.37 + unsigned char* pYData, unsigned char* pMsg, size_t msg_len,
1.38 + uint32_t x = 0, uint32_t y = 0);
1.39 +
1.40 + private:
1.41 + YuvStamper(unsigned char* pYData,
1.42 + uint32_t width, uint32_t height, uint32_t stride,
1.43 + uint32_t x, uint32_t y,
1.44 + unsigned char symbol_width, unsigned char symbol_height);
1.45 +
1.46 + bool WriteDigit(unsigned char digit);
1.47 + void WritePixel(unsigned char* data, uint32_t x, uint32_t y);
1.48 + uint32_t Capacity();
1.49 + bool AdvanceCursor();
1.50 + bool WriteBit(bool one);
1.51 + bool Write8(unsigned char value);
1.52 + bool ReadBit(unsigned char &value);
1.53 + bool Read8(unsigned char &bit);
1.54 +
1.55 + const static unsigned char sPixelSize = 3;
1.56 + const static unsigned char sDigitWidth = 6;
1.57 + const static unsigned char sDigitHeight = 7;
1.58 + const static unsigned char sInterDigit = 1;
1.59 + const static unsigned char sInterLine = 1;
1.60 + const static uint32_t sBitSize = 4;
1.61 + const static uint32_t sBitThreshold = 60;
1.62 + const static unsigned char sYOn = 0x80;
1.63 + const static unsigned char sYOff = 0;
1.64 + const static unsigned char sLumaThreshold = 96;
1.65 + const static unsigned char sLumaMin = 16;
1.66 + const static unsigned char sLumaMax = 235;
1.67 +
1.68 + unsigned char* pYData;
1.69 + uint32_t mStride;
1.70 + uint32_t mWidth;
1.71 + uint32_t mHeight;
1.72 + unsigned char mSymbolWidth;
1.73 + unsigned char mSymbolHeight;
1.74 +
1.75 + struct Cursor {
1.76 + Cursor(uint32_t x, uint32_t y):
1.77 + x(x), y(y) {}
1.78 + uint32_t x;
1.79 + uint32_t y;
1.80 + } mCursor;
1.81 +};
1.82 +
1.83 +}
1.84 +
1.85 +#endif
1.86 +
