# Dirac - A Video Codec

Created by the British Broadcasting Corporation.

motion_arrows.h
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3 * $Id: motion_arrows.h,v 1.4 2008/01/31 11:25:20 tjdwave Exp $ $Name: Dirac_1_0_2 $
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37
38 #ifndef _MOTION_ARROWS_H_
39 #define _MOTION_ARROWS_H_
40
41 #include <util/instrumentation/libdirac_instrument/draw_overlay.h>
42 namespace dirac_instr
43 {
44
46 /*
47 Sub-class of DrawOverlay.
48 16 x 16 pixel arrows used to represent motion vectors
49 Each arrow may represent a number of motion vectors, in which case
50 their mean is used
51 */
52 class DrawMotionArrows : public DrawOverlay
53 {
54 public :
56 /*
57 Calls DrawOverlay constructor
58 */
59 DrawMotionArrows(Picture &, DrawPictureMotionParams &, const MvArray &, int);
60
62 ~DrawMotionArrows();
63
65 // //
66 // Assumes default copy constructor and assignment = //
67 // //
69
71 void DrawBlock(int, int);
72
74 /*
75 Base class function required to be overridden
76 */
77 void DrawLegend();
78
79 protected :
81 void DrawArrow(int, int, int, int);
82
84 int m_mv_scale;
85
87 int m_blocks_per_arrow_y, m_blocks_per_arrow_x;
88
90 const MvArray & m_mv;
91 };
92
93 } // namespace dirac_instr
94
95 #endif
dirac_instr::DrawMotionArrows::m_mv
const MvArray & m_mv
Reference to motion vector data for particular reference.
Definition: motion_arrows.h:90
dirac_instr::DrawPictureMotionParams
Class encapsulating parameters for drawing the picture.
Definition: draw_overlay.h:55
draw_overlay.h
dirac::MvArray
TwoDArray< MVector > MvArray
MvArray is a two-D array of MVectors.
Definition: motion.h:186
dirac_instr::DrawMotionArrows::DrawLegend
void DrawLegend()
Does nothing, no legend for overlay.
dirac_instr::DrawMotionArrows
Class to carry out the overlay of motion vectors represented by arrows.
Definition: motion_arrows.h:52
dirac_instr::DrawMotionArrows::m_mv_scale
int m_mv_scale
Temporal motion vector scaling.
Definition: motion_arrows.h:84
dirac_instr::DrawMotionArrows::m_blocks_per_arrow_x
int m_blocks_per_arrow_x
Definition: motion_arrows.h:87
dirac_instr::DrawMotionArrows::DrawMotionArrows
DrawMotionArrows(Picture &, DrawPictureMotionParams &, const MvArray &, int)
Constructor.
dirac_instr::DrawOverlay
Base class for block overlay objects.
Definition: draw_overlay.h:134
dirac_instr::DrawMotionArrows::DrawBlock
void DrawBlock(int, int)
Manages drawing of motion vector arrows.
dirac_instr::DrawMotionArrows::~DrawMotionArrows
~DrawMotionArrows()
Destructor.
dirac_instr
Definition: draw_overlay.h:50
dirac_instr::DrawMotionArrows::m_blocks_per_arrow_y
int m_blocks_per_arrow_y
Number of blocks per arrow.
Definition: motion_arrows.h:87
dirac_instr::DrawMotionArrows::DrawArrow
void DrawArrow(int, int, int, int)
Draws a single 16 x 16 pixel arrow.
dirac::Picture
A class for encapsulating all the data relating to a picture.
Definition: picture.h:51

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