Argus API
Argus Camera API
Main Page
Related Pages
Namespaces
Classes
Files
File List
File Members
All
Classes
Namespaces
Files
Functions
Variables
Typedefs
Enumerations
Enumerator
Macros
Pages
include
Argus
EventProvider.h
Go to the documentation of this file.
1
/*
2
* Copyright (c) 2016, NVIDIA CORPORATION. All rights reserved.
3
*
4
* Redistribution and use in source and binary forms, with or without
5
* modification, are permitted provided that the following conditions
6
* are met:
7
* * Redistributions of source code must retain the above copyright
8
* notice, this list of conditions and the following disclaimer.
9
* * Redistributions in binary form must reproduce the above copyright
10
* notice, this list of conditions and the following disclaimer in the
11
* documentation and/or other materials provided with the distribution.
12
* * Neither the name of NVIDIA CORPORATION nor the names of its
13
* contributors may be used to endorse or promote products derived
14
* from this software without specific prior written permission.
15
*
16
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
17
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
20
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
21
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
23
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
24
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
*/
28
29
#ifndef _ARGUS_EVENT_PROVIDER_H
30
#define _ARGUS_EVENT_PROVIDER_H
31
32
namespace
Argus
33
{
34
35
/**
36
* @class IEventProvider
37
*
38
* The interface for an object which generates Events (such as CaptureSession).
39
* Any generated Events are initially stored by the provider itself, and they
40
* are not copied out to public EventQueues until waitForEvents() is called.
41
* If at any time there is an event type offered by a provider that is not
42
* accepted by an active EventQueue created by that provider, all events of
43
* that type will be discarded.
44
*/
45
DEFINE_UUID
(InterfaceID, IID_EVENT_PROVIDER, 523ed330,25dc,11e5,867f,08,00,20,0c,9a,66);
46
47
class
IEventProvider
:
public
Interface
48
{
49
public
:
50
static
const
InterfaceID
&
id
() {
return
IID_EVENT_PROVIDER; }
51
52
/**
53
* Returns a list of event types that this provider can generate.
54
* @param[out] types, a vector that will be populated by the available event types.
55
*
56
* @returns success/status of the call.
57
*/
58
virtual
Status
getAvailableEventTypes
(std::vector<EventType>* types)
const
= 0;
59
60
/**
61
* Creates an event queue for events of the given type(s)
62
* @param[in] eventTypes The list of event types for the queue.
63
* @param[out] status An optional pointer to return success/status.
64
*
65
* @returns the new EventQueue object, or NULL on failure.
66
*/
67
virtual
EventQueue
*
createEventQueue
(
const
std::vector<EventType>& eventTypes,
68
Status
* status = NULL) = 0;
69
70
/**
71
* Waits for and transfers any pending events from the provider to the
72
* provided queues.
73
*
74
* Ownership of all events transfered to a queue will be passed from the
75
* provider to the queue, and these event object pointers will remain
76
* valid until the queue is destroyed or until the next call to this
77
* function with that queue. In other words, any events in a queue will be
78
* destroyed when the queue is provided to another call of this function,
79
* regardless of whether or not it receives any new events, or when the
80
* queue is destroyed.
81
*
82
* If more than one given queue accepts events of the same type, only the
83
* first of these queues will receive events of that type.
84
*
85
* Any events that are not copied to queues by this function are left in
86
* the provider until they are queried using a queue receiving events of
87
* that type.
88
*
89
* If there are no pending events of the requested types at the time this
90
* function is called, it will block until one is available or a timeout
91
* occurs.
92
*
93
* @param[in] queues The list of queues to transfer events to.
94
* @param[in] timeout The maximum time (in nanoseconds) to wait for new events.
95
*
96
* @returns success/status of the call.
97
*/
98
virtual
Status
waitForEvents
(
const
std::vector<EventQueue*>& queues,
99
uint64_t timeout =
TIMEOUT_INFINITE
) = 0;
100
101
/**
102
* Variant of waitForEvents() that waits for only one EventQueue.
103
*/
104
virtual
Status
waitForEvents
(
EventQueue
* queue,
105
uint64_t timeout =
TIMEOUT_INFINITE
) = 0;
106
107
protected
:
108
~IEventProvider
() {}
109
};
110
111
}
// namespace Argus
112
113
#endif // _ARGUS_EVENT_PROVIDER_H
Generated on Tue Jan 10 2017 11:35:26 for Argus API by
1.8.1