Add m-esr52 at 52.6.0

1 files changed, 83 insertions, 0 deletions

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<typename T>
+  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
+