Playback track (#509)

* Add playback track data to song

* Extend local_file_mgr to write playbacktrack data

* Added basic core functionality to process audio from playback track

* Resize WaveDisplay Widget properly

* Make WaveDisplay more generic to use it for playback track

* Workaround: Include playback track commands in menus until gui is final

* Create a very basic playback track visualization (kills timeline..)

* Implement resampling for playback track

* WaveDisplay update

* SongEditorPanel: Use buttons to switch between TimeLine and PlaybackTrack

* Removed old and unnecessary comments from SongEditorPanel

* Some reformatting of old SongEditorPanel code

* Hide BPM button if PlaybackTrack is shown

* Hide BPM button if PlaybackTrack is shown (Part II)

* Add buttons to switch between PlaybackTrack and Timeline

* Use new View Timeline/View Playback Track buttons in SongEditor

* Add playback track mute button

* Add Edit playback track button

* Introduce vertical fader

* Sampler: Update playback track  peaks

* Remove bpm button from bg_topPanel

* Save and restore playback track volume

* WaveDisplay: rename member m_background

* SongEditor: Show playback track peaks

* SongEditor code cleanup

* Make use of playback track volume in sampler.cpp

* Remove useless code in SongEditorPanel::faderChanged

* Remove menu entry to select playback track (can now done via button)

* Remove playback track related menu items

* Remove debug output from vertical fader

Author: mauser

data/img/gray/songEditor/bg_topPanel.png

@@ -30,6 +30,7 @@
 
 #define EMPTY_INSTR_ID          -1
 #define METRONOME_INSTR_ID      -2
+#define PLAYBACK_INSTR_ID       -3
 
 namespace H2Core
 {

data/img/gray/songEditor/btn_viewPL_off.png

@@ -1,4 +1,4 @@
-/*
+    /*
  * Hydrogen
  * Copyright(c) 2002-2008 by Alex >Comix< Cominu [[email protected]]
  *
@@ -219,6 +219,27 @@ class Song : public H2Core::Object
 			__latest_round_robins[start_velocity] = latest_round_robin;
 		}
 
+		QString&	get_playback_track_filename(){
+			return __playback_track_filename;
+		}
+		void	set_playback_track_filename( QString filename ){
+			__playback_track_filename = filename;
+		}
+
+		bool	get_playback_track_enabled(){
+			return __playback_track_enabled;
+		}
+		void	set_playback_track_enabled( bool enabled ){
+			__playback_track_enabled = enabled;
+		}
+		
+		float	get_playback_track_volume(){
+			return __playback_track_volume;
+		}
+		void	set_playback_track_volume( float volume ){
+			__playback_track_volume = volume;
+		}
+
 
 	private:
 		float								__volume;						///< volume of the song (0.0..1.0)
@@ -236,6 +257,9 @@ class Song : public H2Core::Object
 		bool								__is_modified;
 		std::map< float, int> 				__latest_round_robins;
 		SongMode							__song_mode;
+		QString								__playback_track_filename;
+		bool								__playback_track_enabled;
+		float								__playback_track_volume;
 		AutomationPath*                     __velocity_automation_path;
 };
 

data/img/gray/songEditor/btn_viewPL_on.png

@@ -237,6 +237,12 @@ class Hydrogen : public H2Core::Object
 
 	CoreActionController* getCoreActionController() const;
 
+	///playback track
+	void			setPlaybackTrackState(bool);
+	bool			getPlaybackTrackState();
+	void			loadPlaybackTrack(QString filename);
+
+
 	///midi lookuptable
 	int m_nInstrumentLookupTable[MAX_INSTRUMENTS];
 
@@ -317,6 +323,20 @@ inline void Hydrogen::setCurrentDrumkitname( const QString& currentdrumkitname )
 	this->m_currentDrumkit = currentdrumkitname;
 }
 
+inline bool Hydrogen::getPlaybackTrackState()
+{
+	Song* pSong = getSong();
+	bool  bState;
+
+	if(!pSong){
+		bState = false;
+	} else {
+		bState = pSong->get_playback_track_enabled();
+	}
+	return 	bState;
+}
+
+
 };
 
 #endif