1 /**
2  * @file
3  * @brief Source file for VideoCacheThread class
4  * @author Jonathan Thomas <jonathan@openshot.org>
5  *
6  * @ref License
7  */
8 
9 /* LICENSE
10  *
11  * Copyright (c) 2008-2019 OpenShot Studios, LLC
12  * <http://www.openshotstudios.com/>. This file is part of
13  * OpenShot Library (libopenshot), an open-source project dedicated to
14  * delivering high quality video editing and animation solutions to the
15  * world. For more information visit <http://www.openshot.org/>.
16  *
17  * OpenShot Library (libopenshot) is free software: you can redistribute it
18  * and/or modify it under the terms of the GNU Lesser General Public License
19  * as published by the Free Software Foundation, either version 3 of the
20  * License, or (at your option) any later version.
21  *
22  * OpenShot Library (libopenshot) is distributed in the hope that it will be
23  * useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25  * GNU Lesser General Public License for more details.
26  *
27  * You should have received a copy of the GNU Lesser General Public License
28  * along with OpenShot Library. If not, see <http://www.gnu.org/licenses/>.
29  */
30 
31 #ifndef OPENSHOT_VIDEO_CACHE_THREAD_H
32 #define OPENSHOT_VIDEO_CACHE_THREAD_H
33 
34 #include "../OpenMPUtilities.h"
35 #include "../ReaderBase.h"
36 #include "../RendererBase.h"
37 
38 namespace openshot
39 {
40     using juce::Thread;
41     using juce::WaitableEvent;
42 
43     /**
44      *  @brief The video cache class.
45      */
46     class VideoCacheThread : Thread
47     {
48 	private:
49 	std::atomic_int position;
50 
51 	protected:
52 	std::shared_ptr<Frame> frame;
53 	int speed;
54 	bool is_playing;
55 	int64_t current_display_frame;
56 	ReaderBase *reader;
57 	int max_concurrent_frames;
58 
59 	/// Constructor
60 	VideoCacheThread();
61 	/// Destructor
62 	~VideoCacheThread();
63 
64 	/// Get the currently playing frame number (if any)
65 	int64_t getCurrentFramePosition();
66 
67     /// Get Speed (The speed and direction to playback a reader (1=normal, 2=fast, 3=faster, -1=rewind, etc...)
getSpeed()68     int getSpeed() const { return speed; }
69 
70 	/// Play the video
71 	void Play();
72 
73 	/// Seek the reader to a particular frame number
74 	void Seek(int64_t new_position);
75 
76 	/// Set the currently displaying frame number
77 	void setCurrentFramePosition(int64_t current_frame_number);
78 
79     /// Set Speed (The speed and direction to playback a reader (1=normal, 2=fast, 3=faster, -1=rewind, etc...)
setSpeed(int new_speed)80     void setSpeed(int new_speed) { speed = new_speed; }
81 
82 	/// Stop the audio playback
83 	void Stop();
84 
85 	/// Start the thread
86 	void run();
87 
88 	/// Set the current thread's reader
Reader(ReaderBase * new_reader)89 	void Reader(ReaderBase *new_reader) { reader=new_reader; Play(); };
90 
91 	/// Parent class of VideoCacheThread
92 	friend class PlayerPrivate;
93 	friend class QtPlayer;
94     };
95 
96 }
97 
98 #endif // OPENSHOT_VIDEO_CACHE_THREAD_H
99