Line data Source code
1 : /* Copyright (c) 2009, Maxim Makhinya
2 : * 2010-2014, Stefan Eilemann <eile@eyescale.ch>
3 : *
4 : * This library is free software; you can redistribute it and/or modify it under
5 : * the terms of the GNU Lesser General Public License version 2.1 as published
6 : * by the Free Software Foundation.
7 : *
8 : * This library is distributed in the hope that it will be useful, but WITHOUT
9 : * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
10 : * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
11 : * details.
12 : *
13 : * You should have received a copy of the GNU Lesser General Public License
14 : * along with this library; if not, write to the Free Software Foundation, Inc.,
15 : * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
16 : */
17 :
18 : #ifndef EQ_ROI_TRACKER_H
19 : #define EQ_ROI_TRACKER_H
20 :
21 : #include <eq/client/types.h>
22 : #include <eq/fabric/pixelViewport.h> // member
23 :
24 : #include <co/types.h>
25 : #include <lunchbox/stdExt.h> // member
26 :
27 : #include <vector>
28 : #include <string>
29 :
30 : namespace eq
31 : {
32 : /** Tracks requested areas for ROI. Used to disable ROI when ROI fails. */
33 : class ROITracker : public boost::noncopyable
34 : {
35 : public:
36 : ROITracker();
37 : virtual ~ROITracker();
38 :
39 : /**
40 : * Has to be called once before any ROI calculation. Tells wether ROIFinder
41 : * should be executed for a particular region or not. If true is returned,
42 : * then updateDelay must be called once before any next useROIFinder
43 : * call. If false is returned, then updateDelay shouldn't be called.
44 : *
45 : * This function uses _prvFrame areas data to match with current pvp. If
46 : * good intersection with one of previous areas is found, it will use
47 : * information from that area form previous frame to decide wether it should
48 : * skip ROIFinder execution or not. If good intersection is not found area
49 : * cosidered new, and function returns true.
50 : *
51 : * @param pvp same viewport that will be specifyed for FOIFinder
52 : * @param stage current assembling stage
53 : * @param frameID should be different for different frames
54 : * @param ticket should be stored by caller and given to updateDelay
55 : *
56 : * @return true if ROIFinder should be called for given region.
57 : */
58 : bool useROIFinder( const PixelViewport& pvp,
59 : const uint32_t stage,
60 : const uint128_t& frameID,
61 : uint8_t*& ticket );
62 :
63 : /**
64 : * Has to be called once after every positive result from useROIFinder.
65 : * Shouldn't be called otherwise
66 : *
67 : * It checks how much space ROIFinder was able to discard and if it is not
68 : * enough it will disable usage of ROIFinder for several next frames. If
69 : * ROIFinder was able to cut-off enought it will reset failure statistics
70 : * for that region.
71 : *
72 : * @param pvps result from ROIFinder
73 : * @param ticket value from useROIFinder
74 : */
75 : void updateDelay( const PixelViewports& pvps, const uint8_t* ticket );
76 :
77 : private:
78 : /** Area of readback */
79 : struct Area
80 : {
81 : Area( const PixelViewport& pvp_,
82 : uint32_t lastSkip_ = 0,
83 : uint32_t skip_ = 0 );
84 :
85 : PixelViewport pvp;
86 : uint32_t lastSkip; //!< Previousely skiped number of frames
87 : uint32_t skip; //!< Number of frames to skip ROIFinder
88 : };
89 : /** Set of readback areas per compositiong stage */
90 0 : struct Stage
91 : {
92 : std::vector< Area > areas;
93 : };
94 : /** Areas for different compositiong stages for current frame.
95 : This data if filled during useROIFinder calls, it uses
96 : useROIFinder parameters and _prvFrame data as refference */
97 : stde::hash_map< uint32_t, Stage >* _curFrame;
98 :
99 : /** Areas for different compositiong stages for previous frame. */
100 : stde::hash_map< uint32_t, Stage >* _prvFrame;
101 :
102 : uint8_t* _ticket;//!< returned on getDelay, should match on updateDelay
103 : bool _needsUpdate;//!< true after getDelay, false after updateDelay
104 : uint128_t _lastFrameID;//!< used to determine new frames
105 : uint32_t _lastStage; //!< used in updateDelay to find last added area
106 :
107 : bool _returnPositive( uint8_t*& ticket );
108 : };
109 : }
110 :
111 : #endif //EQ_ROI_TRACKER_H
112 :
|
