Ottenere un file WAV da un file Midi con le funzioni esterne del API di FluidSynth

Con le risorse della libreria Libfluidsynth è possibile ottenere un file WAV da un file Midi.

E' necessario avere istallata e richiamare in Gambas la libreria dinamica condivisa: "libfluidsynth:1.5.2"

Mostriamo di seguito un esempio a riga di comando:

Library "libfluidsynth:1.5.2"

' fluid_settings_t* new_fluid_settings(void)
' Create a new settings object.
Private Extern new_fluid_settings() As Pointer

' fluid_synth_t * new_fluid_synth(fluid_settings_t * settings)
' Create new FluidSynth instance.
Private Extern new_fluid_synth(settings As Pointer) As Pointer

' int fluid_is_soundfont(const char * filename)
' Check if a file is a SoundFont file.
Private Extern fluid_is_soundfont(filename As String) As Integer

' int fluid_synth_sfload(fluid_synth_t * synth, const char * filename, nt reset_presets)
' Load a SoundFont file.
Private Extern fluid_synth_sfload(synth As Pointer, filename As String, reset_presets As Integer) As Integer

' int fluid_settings_getnum(fluid_settings_t* settings, const char *name, double* val)
' Get the numeric value of a named setting.
Private Extern fluid_settings_getnum(settings As Pointer, name As String, dval As Pointer) As Integer

' fluid_player_t* new_fluid_player(fluid_synth_t * synth)
' Create a new MIDI player.
Private Extern new_fluid_player(synth As Pointer) As Pointer

' int fluid_is_midifile(const char *filename)
' Check if a file is a MIDI file.
Private Extern fluid_is_midifile(filename As String) As Integer

' int fluid_player_add(fluid_player_t * player, Const char * midifile)
' Add a MIDI file to a player queue.
Private Extern fluid_player_add(player As Pointer, midifile As String) As Integer

' int fluid_player_play(fluid_player_t * player)
' Activates play mode for a MIDI player if not already playing.
Private Extern fluid_player_play(player As Pointer) As Integer

' int fluid_synth_write_s16(fluid_synth_t* synth, int len, void* lout, int loff, int lincr, void* rout, int roff, int rincr)
' Synthesize a block of 16 bit audio samples to audio buffers.
Private Extern fluid_synth_write_s16(synth As Pointer, ilen As Integer, luot As Short[], loff As Integer, lincr As Integer, rout As Short[], forr As Integer, rincr As Integer) As Integer

' int fluid_player_get_status(fluid_player_t * player)
' Get MIDI player status.
Private Extern fluid_player_get_status(player As Pointer) As Integer

' int delete_fluid_player(fluid_player_t * player)
' Delete a MIDI player instance.
Private Extern delete_fluid_player(player As Pointer) As Integer

' int delete_fluid_synth(fluid_synth_t * synth)
' Delete a FluidSynth instance.
Private Extern delete_fluid_synth(synth As Pointer) As Integer

' void delete_fluid_settings(fluid_settings_t * settings)
' Delete the provided settings object.
Private Extern delete_fluid_settings(settings As Pointer)


Public Sub Main()

 
  
End

Riferimenti

• http://fluidsynth.sourceforge.net/api/

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