Update talk to 60923971

Review URL: https://webrtc-codereview.appspot.com/7909004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/talk@5475 4adac7df-926f-26a2-2b94-8c16560cd09d

1 files changed, 78 insertions, 0 deletions

diff --git a/media/base/yuvframegenerator.h b/media/base/yuvframegenerator.h
new file mode 100644
index 0000000..4adf971
--- /dev/null
+++ b/media/base/yuvframegenerator.h
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+// Generates YUV420 frames with a "landscape with striped crosshair" in the
+// Y-plane, plus a horizontal gradient in the U-plane and a vertical one in the
+// V-plane. This makes for a nice mix of colours that is suited for both
+// catching visual errors and making sure e.g. YUV->RGB/BGR conversion looks
+// the same on different platforms.
+// There is also a solid box bouncing around in the Y-plane, and two differently
+// coloured lines bouncing horizontally and vertically in the U and V plane.
+// This helps illustrating how the frame boundary goes, and can aid as a quite
+// handy visual help for noticing e.g. packet loss if the frames are encoded
+// and sent over the network.
+
+#ifndef TALK_MEDIA_BASE_YUVFRAMEGENERATOR_H_
+#define TALK_MEDIA_BASE_YUVFRAMEGENERATOR_H_
+
+#include "talk/base/basictypes.h"
+
+namespace cricket {
+
+class YuvFrameGenerator {
+ public:
+  // Constructs a frame-generator that produces frames of size |width|x|height|.
+  // If |enable_barcode| is specified, barcodes can be included in the frames
+  // when calling |GenerateNextFrame(uint8*, uint32)|. If |enable_barcode| is
+  // |true| then |width|x|height| should be at least 160x100; otherwise this
+  // constructor will abort.
+  YuvFrameGenerator(int width, int height, bool enable_barcode);
+  ~YuvFrameGenerator();
+
+  int GetFrameSize() { return frame_data_size_; }
+
+  // Generate the next frame and return it in the provided |frame_buffer|. If
+  // barcode_value is not |nullptr| the value referred by it will be encoded
+  // into a barcode in the frame.  The value should in the range:
+  // [0..9,999,999]. If the value exceeds this range or barcodes were not
+  // requested in the constructor, this function will abort.
+  void GenerateNextFrame(uint8* frame_buffer, int32 barcode_value);
+
+  int GetHeight() { return height_; }
+  int GetWidth() { return width_; }
+
+  // Fetch the bounds of the barcode from the generator. The barcode will
+  // always be at this location. This function will abort if barcodes were not
+  // requested in the constructor.
+  void GetBarcodeBounds(int* top, int* left, int* width, int* height);
+
+ private:
+  void DrawLandscape(uint8 *p, int w, int h);
+  void DrawGradientX(uint8 *p, int w, int h);
+  void DrawGradientY(uint8 *p, int w, int h);
+  void DrawMovingLineX(uint8 *p, int w, int h, int n);
+  void DrawMovingLineY(uint8 *p, int w, int h, int n);
+  void DrawBouncingCube(uint8 *p, int w, int h, int n);
+
+  void DrawBarcode(uint32 value);
+  int DrawSideGuardBars(int x, int y, int height);
+  int DrawMiddleGuardBars(int x, int y, int height);
+  int DrawEanEncodedDigit(int digit, int x, int y, int height, bool r_code);
+  void DrawBlockRectangle(uint8* p, int x_start, int y_start,
+                          int width, int height, int pitch, uint8 value);
+
+ private:
+  int width_;
+  int height_;
+  int frame_index_;
+  int frame_data_size_;
+  uint8* y_data_;
+  uint8* u_data_;
+  uint8* v_data_;
+
+  int barcode_start_x_;
+  int barcode_start_y_;
+
+  DISALLOW_COPY_AND_ASSIGN(YuvFrameGenerator);
+};
+
+}  // namespace cricket
+
+#endif  // TALK_MEDIA_BASE_YUVFRAMEGENERATOR_H_