# -*- coding: utf-8 -*-
"""
module pour jouer les chansons sur le fluidsynth

$Id$
$URL$
"""
import fluidsynth
from app.musicxml import musicXml2Song
from time import sleep
import sys
from optparse import OptionParser

class SongPlayer(object) :
    """ Lecteur audio d'une chanson """

    def __init__(self, part, soundFont, quarterNoteDuration=400, bank=0, preset=0) :
        self.part = part
        self.quarterNoteDuration = quarterNoteDuration
        self.fs = fs = fluidsynth.Synth()
        fs.start()
        self.fsid = fsid = fs.sfload(soundFont)
        fs.program_select(0, fsid, bank, preset)
    
    def __del__(self) :
        self.fs.delete()
    
    def play(self) :
        fs = self.fs
        for note, verseIndex in self.part.iterNotes() :
            try :
                print note, note.lyrics[verseIndex]
            except IndexError :
                print note, '?'
            fs.noteon(0, note.midi, 64)
            duration = note.duration * self.quarterNoteDuration / 1000
            sleep(duration)
            fs.noteoff(0, note.midi)
            
            
            
        

def main() :
    usage = "%prog musicXmlFile.xml [options]"
    op = OptionParser(usage)
    op.add_option("-i", "--part-index", dest="partIndex"
                 , default = 0
                 , help = "Index de la partie qui contient le champ.")

    op.add_option("-c", '--no-chorus', dest='autoDetectChorus'
             , action="store_false"
             , default = True
             , help = "désactive la détection du refrain")

    op.add_option("-q", "--quarter-note-duration", dest="quarterNoteDuration"
                  , type="int", default=400
                  , help="Durée de la noire [default] (en millisecondes)"
                  )

    op.add_option("-b", "--bank", dest="bank"
                  , type="int", default="0"
                  , help="midi bank [default]")

    op.add_option("-p", "--preset", dest="preset"
                , type="int", default="0"
                , help="midi preset [default]")
        
    options, args = op.parse_args()
    
    if len(args) != 1 :
        raise SystemExit(op.format_help())
    
    song = musicXml2Song(args[0],
                         partIndex=options.partIndex,
                         autoDetectChorus=options.autoDetectChorus)
    sp = SongPlayer(song,
                    '/Users/pinbe/dev/minwii/fluid-soundfont-3.1/FluidR3_GM.sf2',
                    quarterNoteDuration=options.quarterNoteDuration,
                    bank = options.bank,
                    preset = options.preset)
    sp.play()


if __name__ == '__main__' :
    sys.exit(main())