1 // Generates YUV420 frames with a "landscape with striped crosshair" in the
2 // Y-plane, plus a horizontal gradient in the U-plane and a vertical one in the
3 // V-plane. This makes for a nice mix of colours that is suited for both
4 // catching visual errors and making sure e.g. YUV->RGB/BGR conversion looks
5 // the same on different platforms.
6 // There is also a solid box bouncing around in the Y-plane, and two differently
7 // coloured lines bouncing horizontally and vertically in the U and V plane.
8 // This helps illustrating how the frame boundary goes, and can aid as a quite
9 // handy visual help for noticing e.g. packet loss if the frames are encoded
10 // and sent over the network.
12 #ifndef TALK_MEDIA_BASE_YUVFRAMEGENERATOR_H_
13 #define TALK_MEDIA_BASE_YUVFRAMEGENERATOR_H_
15 #include "webrtc/base/basictypes.h"
19 class YuvFrameGenerator {
21 // Constructs a frame-generator that produces frames of size |width|x|height|.
22 // If |enable_barcode| is specified, barcodes can be included in the frames
23 // when calling |GenerateNextFrame(uint8*, uint32)|. If |enable_barcode| is
24 // |true| then |width|x|height| should be at least 160x100; otherwise this
25 // constructor will abort.
26 YuvFrameGenerator(int width, int height, bool enable_barcode);
29 int GetFrameSize() { return frame_data_size_; }
31 // Generate the next frame and return it in the provided |frame_buffer|. If
32 // barcode_value is not |nullptr| the value referred by it will be encoded
33 // into a barcode in the frame. The value should in the range:
34 // [0..9,999,999]. If the value exceeds this range or barcodes were not
35 // requested in the constructor, this function will abort.
36 void GenerateNextFrame(uint8* frame_buffer, int32 barcode_value);
38 int GetHeight() { return height_; }
39 int GetWidth() { return width_; }
41 // Fetch the bounds of the barcode from the generator. The barcode will
42 // always be at this location. This function will abort if barcodes were not
43 // requested in the constructor.
44 void GetBarcodeBounds(int* top, int* left, int* width, int* height);
47 void DrawLandscape(uint8 *p, int w, int h);
48 void DrawGradientX(uint8 *p, int w, int h);
49 void DrawGradientY(uint8 *p, int w, int h);
50 void DrawMovingLineX(uint8 *p, int w, int h, int n);
51 void DrawMovingLineY(uint8 *p, int w, int h, int n);
52 void DrawBouncingCube(uint8 *p, int w, int h, int n);
54 void DrawBarcode(uint32 value);
55 int DrawSideGuardBars(int x, int y, int height);
56 int DrawMiddleGuardBars(int x, int y, int height);
57 int DrawEanEncodedDigit(int digit, int x, int y, int height, bool r_code);
58 void DrawBlockRectangle(uint8* p, int x_start, int y_start,
59 int width, int height, int pitch, uint8 value);
73 DISALLOW_COPY_AND_ASSIGN(YuvFrameGenerator);
76 } // namespace cricket
78 #endif // TALK_MEDIA_BASE_YUVFRAMEGENERATOR_H_