JeVois  1.21
JeVois Smart Embedded Machine Vision Toolkit
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VideoDisplay.H
Go to the documentation of this file.
1// ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
2//
3// JeVois Smart Embedded Machine Vision Toolkit - Copyright (C) 2016 by Laurent Itti, the University of Southern
4// California (USC), and iLab at USC. See http://iLab.usc.edu and http://jevois.org for information about this project.
5//
6// This file is part of the JeVois Smart Embedded Machine Vision Toolkit. This program is free software; you can
7// redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software
8// Foundation, version 2. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
9// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
10// License for more details. You should have received a copy of the GNU General Public License along with this program;
11// if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
12//
13// Contact information: Laurent Itti - 3641 Watt Way, HNB-07A - Los Angeles, CA 90089-2520 - USA.
14// Tel: +1 213 740 3527 - itti@pollux.usc.edu - http://iLab.usc.edu - http://jevois.org
15// ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////
16/*! \file */
17
18#pragma once
19
24#include <vector>
25#include <memory>
26#include <atomic>
27
28namespace jevois
29{
30 //! Video output to local screen
31 /*! This class is useful for debugging machine vision code on a desktop computer as opposed to the JeVois
32 hardware. Images are simply displayed on the local screen. Engine instantiates a VideoDisplay in place of Gadget
33 if the provided Gadget device name is empty. \ingroup core */
35 {
36 public:
37 //! Constructor
38 VideoDisplay(char const * displayname, size_t nbufs = 2);
39
40 //! Virtual destructor for safe inheritance
41 virtual ~VideoDisplay();
42
43 //! Set the video format and frame rate, allocate the buffers
44 void setFormat(VideoMapping const & m) override;
45
46 //! Get a pre-allocated image so that we can fill the pixel data and later send out using send()
47 void get(RawImage & img) override;
48
49 //! Send an image out to display
50 void send(RawImage const & img) override;
51
52 //! Start streaming
53 void streamOn() override;
54
55 //! Abort streaming
56 /*! This only cancels future get() and done() calls, one should still call streamOff() to turn off streaming. */
57 void abortStream() override;
58
59 //! Stop streaming
60 void streamOff() override;
61
62 private:
63 std::vector<std::shared_ptr<VideoBuf> > itsBuffers;
65 std::string const itsName;
66 };
67}
68
Thread-safe synchronized producer/consumer queue.
A raw image as coming from a V4L2 Camera and/or being sent out to a USB Gadget.
Definition RawImage.H:111
Video output to local screen.
void streamOff() override
Stop streaming.
virtual ~VideoDisplay()
Virtual destructor for safe inheritance.
void abortStream() override
Abort streaming.
void send(RawImage const &img) override
Send an image out to display.
void setFormat(VideoMapping const &m) override
Set the video format and frame rate, allocate the buffers.
void streamOn() override
Start streaming.
void get(RawImage &img) override
Get a pre-allocated image so that we can fill the pixel data and later send out using send()
Base class for video output. Gadget, MovieOutput, VideoDisplay, and VideoOutputNone derive from it.
Definition VideoOutput.H:28
Main namespace for all JeVois classes and functions.
Definition Concepts.dox:2
Simple struct to hold video mapping definitions for the processing Engine.