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| (13 versioni intermedie di uno stesso utente non sono mostrate) |
| Riga 1: |
Riga 1: |
| − | Mostriamo di seguito il codice per di un semplice applicativo per la riproduzione di file Midi.
| + | * [[Eseguire un file MIDI mediante le funzioni esterne del API di Fluidsynth]] |
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| − | Bisogna avere installato ''Jackd''. Una volta lanciato l'applicativo, aprire ''Jackd'' e nella scheda "''Audio''" connettere il dispositivo "''Fluidsynth''", presente nella colonna "''Clients leggibili/Porte d'uscita''", al dispositivo "''system''" presente nella colonna "''Clients scrivibili/Porte d'entrata''".
| + | * [[Ottenere un file WAV da un file Midi con le funzioni esterne del API di FluidSynth]] |
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| − | Si dovrà, inoltre, individuare un file ''soundfont bank'' con estensione <FONT color=#B22222>.sf2</font>, da far caricare successivamente dalla funzione esterna "''fluid_synth_sfload''" per poter ottenere i suoni.
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| − | Private settings As Pointer
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| − | Private synth As Pointer
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| − | Private adriver As Pointer
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| − | Private player As Pointer
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| − | Private fileMidi As String
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| − | Private Const ALL_SOUND_OFF As Integer = 120
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| − | Private Const ALL_NOTES_OFF As Integer = 123
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| − | Library "libfluidsynth:1.7.0"
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| − | <FONT color=gray>' ''fluid_settings_t* new_fluid_settings(void)''
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| − | ' ''Create a new settings object. ''</font>
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| − | Private Extern new_fluid_settings() As Pointer
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| − | <FONT color=gray>' ''fluid_synth_t * new_fluid_synth (fluid_settings_t *settings)''
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| − | ' ''Create new FluidSynth instance.''</font>
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| − | Private Extern new_fluid_synth(settP As Pointer) As Pointer
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| − | <FONT color=gray>' ''fluid_player_t* new_fluid_player(fluid_synth_t * synth)''
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| − | ' ''Create a new MIDI player.''</font>
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| − | Private Extern new_fluid_player(synth As Pointer) As Pointer
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| − | <FONT color=gray>' ''int fluid_settings_setint(fluid_settings_t *settings, const char *name, int val)''
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| − | ' ''Set an integer value for a setting.''</font>
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| − | Private Extern fluid_settings_setint(settP As Pointer, name As String, valI As Integer) As Integer
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| − | <FONT color=gray>' ''fluid_audio_driver_t* new_fluid_audio_driver(fluid_settings_t * settings, fluid_synth_t * synth)''
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| − | ' ''Create a new audio driver.''</font>
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| − | Private Extern new_fluid_audio_driver(settings As Pointer, synth As Pointer) As Pointer
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| − | <FONT color=gray>' ''int fluid_is_soundfont(const char * filename)''
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| − | ' ''Check if a file is a SoundFont file.''</font>
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| − | Private Extern fluid_is_soundfont(filename As String) As Integer
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| − | <FONT color=gray>' ''int fluid_synth_sfload(fluid_synth_t * synth, const char * filename, nt reset_presets)''
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| − | ' ''Load a SoundFont file (filename is interpreted by SoundFont loaders).''</font>
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| − | Private Extern fluid_synth_sfload(synth As Pointer, filename As String, reset_presets As Integer) As Integer
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| − | <FONT color=gray>' ''int fluid_is_midifile(const char * filename)''
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| − | ' ''Check if a file is a MIDI file.''</font>
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| − | Private Extern fluid_is_midifile(filename As String) As Integer
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| − | <FONT color=gray>' ''int fluid_player_add(fluid_player_t * player, Const char * midifile)
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| − | ' ''Add a MIDI file to a player queue.''</font>
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| − | Private Extern fluid_player_add(player As Pointer, $fileMidi As String) As Integer
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| − | <FONT color=gray>' ''int fluid_player_play(fluid_player_t * player)''
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| − | ' ''Activates play mode for a MIDI player if not already playing.''</font>
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| − | Private Extern fluid_player_play(player As Pointer) As Integer
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| − | <FONT color=gray>' ''int fluid_player_stop(fluid_player_t * player)''
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| − | ' ''Stops a MIDI player.''</font>
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| − | Private Extern fluid_player_stop(player As Pointer) As Integer
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| − | <FONT color=gray>' ''int fluid_player_get_status(fluid_player_t * player)''
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| − | ' ''Get MIDI player status.''</font>
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| − | Private Extern fluid_player_get_status(player As Pointer) As Integer
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| − | <FONT color=gray>' ''int fluid_synth_cc (fluid_synth_t *synth, int chan, int ctrl, int val)''
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| − | ' ''Send a MIDI controller event on a MIDI channel.''</font>
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| − | Private Extern fluid_synth_cc(synth As Pointer, chan As Integer, ctrl As integer, ival As Integer) As Integer
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| − | <FONT color=gray>' ''void delete_fluid_audio_driver(fluid_audio_driver_t * driver)''
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| − | ' ''Deletes an audio driver instance.''</font>
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| − | Private Extern delete_fluid_audio_driver(driver As Pointer)
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| − | <FONT color=gray>' ''int delete_fluid_player(fluid_player_t * player)''
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| − | ' ''Delete a MIDI player instance.''</font>
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| − | Private Extern delete_fluid_player(player As Pointer) As Integer
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| − | <FONT color=gray>' ''int delete_fluid_synth(fluid_synth_t * synth)''
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| − | ' ''Delete a FluidSynth instance.''</font>
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| − | Private Extern delete_fluid_synth(synth As Pointer) As Integer
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| − | <FONT color=gray>' ''void delete_fluid_settings(fluid_settings_t * settings)''
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| − | ' ''Delete the provided settings object.''</font>
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| − | Private Extern delete_fluid_settings(settings As Pointer)
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| − | '''Public''' Sub Form_Open()
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| − | Dim i As Integer
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| − | Dim filesbk As String
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| − | filesbk = "<FONT color=gray>''/percorso/del/file/soundfont.sf2''</font>"
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| − | settings = new_fluid_settings()
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| − | synth = new_fluid_synth(settings)
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| − | player = new_fluid_player(synth)
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| − | i = fluid_settings_setint(settings, "audio.jack.autoconnect", 1)
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| − | If i = 0 Then Error.Raise("Errore alla funzione 'fluid_settings_setint()' !")
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| − | adriver = new_fluid_audio_driver(settings, synth)
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| − | If IsNull(adriver) Then Error.Raise("Impossibile creare un driver audio !")
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| − | i = fluid_is_soundfont(filesbk)
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| − | If CBool(i) = False then Error.Raise("Il file non è un soundfont bank !")
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| − | i = fluid_synth_sfload(synth, filesbk, 1)
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| − | If i < 0 Then Error.Raise("Errore alla funzione 'fluid_synth_sfload()' !")
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| − | '''End'''
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| − | '''Public''' Sub Button1_Click()
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| − | Dim i As Integer
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| − | i = fluid_player_add(player, fileMidi)
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| − | If i < 0 Then Error.Raise("Errore alla funzione 'fluid_player_add()' !")
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| − | <FONT color=gray>' ''Avvia l'esecuzione del file Midi:''</font>
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| − | i = fluid_player_play(player)
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| − | If i < 0 Then Error.Raise("Errore alla funzione 'fluid_player_play()' !")
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| − | Do
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| − | Wait 0.01
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| − | Loop Until fluid_player_get_status(player) <> 1
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| − | i = delete_fluid_player(player)
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| − | If i < 0 Then Error.Raise("Errore alla funzione 'delete_fluid_player()' !")
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| − | player = new_fluid_player(synth)
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| − | '''End'''
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| − | '''Public''' Sub Button2_Click()
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| − | Dim i As Integer
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| − | Dim b As Byte
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| − | <FONT color=gray>' ''Arresta l'esecuzione del file Midi:''</font>
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| − | i = fluid_player_stop(player)
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| − | If i < 0 Then Error.Raise("Errore alla funzione 'fluid_player_stop()' !")
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| − | For b = 0 To 15
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| − | i = fluid_synth_cc(synth, b, ALL_NOTES_OFF, 0)
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| − | If i < 0 Then Error.Raise("Errore alla funzione 'fluid_synth_cc()' !")
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| − | i = fluid_synth_cc(synth, b, ALL_SOUND_OFF, 0)
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| − | If i < 0 Then Error.Raise("Errore alla funzione 'fluid_synth_cc()' !")
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| − | Next
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| − | '''End'''
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| − | '''Public''' Sub Form_Close()
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| − | delete_fluid_audio_driver(adriver)
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| − | delete_fluid_player(player)
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| − | delete_fluid_synth(synth)
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| − | delete_fluid_settings(settings)
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| − | '''End'''
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| − | '''Public''' Sub MenuApri_Click()
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| − | Dim i As Integer
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| − | With Dialog
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| − | .Title = "Apri file Midi..."
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| − | .Filter = ["*.mid", "File Midi"]
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| − | If .OpenFile() Then Return
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| − | fileMidi = .Path
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| − | End With
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| − | i = fluid_is_midifile(fileMidi)
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| − | If CBool(i) = False Then Error.Raise("Il file caricato non è un file Midi standard !")
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| − | '''End'''
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| − | =Riferimenti=
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| − | * http://www.fluidsynth.org/
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| − | * http://fluidsynth.sourceforge.net/api/
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