haiku-beta6/headers/os/midi/MidiSynthFile.h

#ifndef _MIDI_SYNTH_FILE_H
#define _MIDI_SYNTH_FILE_H

#include <BeBuild.h>
#include <MidiSynth.h>
#include <Entry.h>

typedef void (*synth_file_hook)(int32 arg);

class BMidiSynthFile : public BMidiSynth
{
public:
	BMidiSynthFile();
	~BMidiSynthFile();

	status_t LoadFile(const entry_ref* midi_entry_ref);
	void UnloadFile(void);

	virtual status_t Start(void);
	virtual void Stop(void);

	void Fade(void);
	void Pause(void);
	void Resume(void);

	/* get ticks in microseconds of length of song */
	int32 Duration(void) const;

	/* set the current playback position of song in microseconds */
	int32 Position(int32 ticks) const;

	/* get the current playback position of a song in microseconds */
	int32 Seek();

	/* get the patches required to play this song */
	status_t GetPatches(int16* pArray768, int16* pReturnedCount) const;

	/* Set a call back when song is done */
	void SetFileHook(synth_file_hook pSongHook, int32 arg);

	/* poll to see if song is done */
	bool IsFinished(void) const;

	/* set song master tempo. (1.0 uses songs encoded tempo, 2.0 will play */
	/* song twice as fast, and 0.5 will play song half as fast */
	void ScaleTempoBy(double tempoFactor);

	/* sets tempo in beats per minute */
	void SetTempo(int32 newTempoBPM);

	/* returns tempo in beats per minute */
	int32 Tempo(void) const;

	/* pass true to loop song, false to not loop */
	void EnableLooping(bool loop);

	/* Mute and unmute tracks (0 to 64) */
	void MuteTrack(int16 track, bool do_mute);
	void GetMuteMap(char* pTracks) const;

	void SoloTrack(int16 track, bool do_solo);
	void GetSoloMap(char* pTracks) const;

private:

	virtual void _ReservedMidiSynthFile1();
	virtual void _ReservedMidiSynthFile2();
	virtual void _ReservedMidiSynthFile3();

	friend class BSynth;							   

	uint32 _reserved[4];
};

#endif // _MIDI_SYNTH_FILE