Sayonara Player
Fadeable.h
1 /* CrossFader.h */
2 
3 /* Copyright (C) 2011-2020 Michael Lugmair (Lucio Carreras)
4  *
5  * This file is part of sayonara player
6  *
7  * This program is free software: you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation, either version 3 of the License, or
10  * (at your option) any later version.
11 
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU General Public License for more details.
16 
17  * You should have received a copy of the GNU General Public License
18  * along with this program. If not, see <http://www.gnu.org/licenses/>.
19  */
20 
21 /* CrossFader.h */
22 
23 #ifndef CROSSFADER_H
24 #define CROSSFADER_H
25 
26 #include "Utils/Pimpl.h"
27 #include <QThread>
28 
29 
30 namespace PipelineExtensions
31 {
32  class Fadeable;
33 
39  public QObject
40  {
41  Q_OBJECT
42  PIMPL(CrossFadeableTimer)
43 
44  public:
45  CrossFadeableTimer(Fadeable* fadeable);
47  void start(MilliSeconds ms);
48  void stop();
49 
50  private slots:
51  void timedOut();
52  };
53 
54 
59  class Fadeable
60  {
61  PIMPL(Fadeable)
62 
63  public:
64 
65  enum class FadeMode : unsigned char
66  {
67  NoFading=0,
68  FadeIn,
69  FadeOut
70  };
71 
72  Fadeable();
73  Fadeable(const Fadeable& other)=delete;
74 
75  virtual ~Fadeable();
76 
82  MilliSeconds fadingTimeMs() const;
83 
87  void fadeIn();
88 
92  void fadeOut();
93 
94 
95  private:
96  bool initFader(FadeMode mode);
97 
98  protected:
99  virtual void stop()=0;
100  virtual void play()=0;
101 
106  virtual void postProcessFadeOut()=0;
107 
112  virtual void postProcessFadeIn()=0;
113 
118  virtual double internalVolume() const=0;
119 
124  virtual void setInternalVolume(double vol)=0;
125 
129  void abortFader();
130 
131 
132  private:
133  friend class CrossFadeableTimer;
134  void timedOut();
135  };
136 }
137 
138 #endif // CROSSFADER_H
The CrossFadeableTimer class.
Definition: Fadeable.h:40
The CrossFader class.
Definition: Fadeable.h:60
virtual void setInternalVolume(double vol)=0
set current volume of pipeline
virtual void postProcessFadeIn()=0
Some additional stuff the implementation class wants to do when fading in.
virtual double internalVolume() const =0
get current volume of pipeline
virtual void postProcessFadeOut()=0
Some additional stuff the implementation class wants to do when fading out.
void fadeOut()
start to fade out
MilliSeconds fadingTimeMs() const
get fading time in ms. This is useful to calculate the beginning of the next track
void fadeIn()
start to fade in
void abortFader()
Stops the current fader process.