src/app/logfilereader.py

   1 # -*- coding: utf-8 -*-
   2 """
   3 Module de lecture des fichiers de log minwii
   4
   5 $Id$
   6 $URL$
   7 """
   8
   9 from widgets.playingscreen import PlayingScreenBase
  10 from eventutils import EventDispatcher
  11 from events import eventCodes
  12 from synth import Synth
  13 from musicxml import musicXml2Song
  14 import pygame
  15
  16 SUPPORTED_FILE_HEADER = 'ENV winwii log format version : 1.0-alpha'
  17
  18 class LogFileReader(object) :
  19
  20     def __init__(self, logfile) :
  21         if isinstance(logfile, str) :
  22             self.logfile = open(logfile, 'r')
  23         else :
  24             self.logfile = logfile
  25
  26         firstline = self.next()
  27         assert firstline == SUPPORTED_FILE_HEADER
  28
  29
  30     def getSongFile(self) :
  31         f = self.logfile
  32         pos = f.tell()
  33
  34         f.seek(0)
  35         for l in self :
  36             if l.startswith('APP chanson :') :
  37                 break
  38         songfile = l.split(':', 1)[1].strip()
  39         f.seek(pos)
  40         return songfile
  41
  42     def getSoundFontFile(self) :
  43         f = self.logfile
  44         pos = f.tell()
  45         f.seek(0)
  46         for l in self :
  47             if l.startswith('ENV soundfont :') :
  48                 break
  49         soundFontFile = l.split(':', 1)[1].strip()
  50         f.seek(pos)
  51         return soundFontFile
  52
  53     def getBank(self) :
  54         f = self.logfile
  55         pos = f.tell()
  56         f.seek(0)
  57         for l in self :
  58             if l.startswith('APP bank :') :
  59                 break
  60         f.seek(pos)
  61         bank = l.split(':', 1)[1].strip()
  62         return int(bank)
  63
  64     def getPreset(self) :
  65         f = self.logfile
  66         pos = f.tell()
  67         f.seek(0)
  68         for l in self :
  69             if l.startswith('APP preset :') :
  70                 break
  71         f.seek(pos)
  72         preset = l.split(':', 1)[1].strip()
  73         return int(preset)
  74
  75     def getScreenResolution(self) :
  76         f = self.logfile
  77         pos = f.tell()
  78         f.seek(0)
  79         for l in self :
  80             if l.startswith('ENV résolution écran :') :
  81                 break
  82         screenResolution = eval(l.split(':', 1)[1].strip())
  83         f.seek(pos)
  84         return screenResolution
  85
  86     def getFirstEventTicks(self) :
  87         f = self.logfile
  88         pos = f.tell()
  89         f.seek(0)
  90         for l in self :
  91             if l.startswith('EVT ') :
  92                 break
  93         firstTicks = int(l.split(None, 2)[1])
  94         f.seek(pos)
  95         return firstTicks
  96
  97     def __del__(self) :
  98         self.logfile.close()
  99
 100     def __iter__(self) :
 101         return self
 102
 103     def next(self) :
 104         line = self.logfile.next().strip()
 105         return line
 106
 107     def getEventsIterator(self) :
 108         self.logfile.seek(0)
 109         while True :
 110             try :
 111                 l = self.next()
 112             except StopIteration :
 113                 break
 114
 115             if not l.startswith('EVT ') :
 116                 continue
 117             try :
 118                 ticks, eventName, message = l.split(None, 3)[1:]
 119                 yield ticks, eventName, message
 120             except ValueError :
 121                 ticks, eventName = l.split(None, 3)[1:]
 122                 yield ticks, eventName, ''
 123
 124
 125 class LogFilePlayer(PlayingScreenBase) :
 126     """
 127     ré-exécution d'une chanson sur la base de son fichier de log.
 128     """
 129
 130     def __init__(self, logfile) :
 131         lfr = self.lfr = LogFileReader(logfile)
 132         songFile = lfr.getSongFile()
 133         soundFontFile = lfr.getSoundFontFile()
 134         sfPath = lfr.getSoundFontFile()
 135         bank = lfr.getBank()
 136         preset = lfr.getPreset()
 137         synth = Synth(sfPath=sfPath)
 138         synth.program_select(0, bank, preset)
 139         self.song = musicXml2Song(songFile)
 140         screenResolution = lfr.getScreenResolution()
 141
 142         pygame.display.set_mode(screenResolution)
 143
 144         super(LogFilePlayer, self).__init__(synth, self.song.distinctNotes)
 145
 146     def run(self):
 147         self._running = True
 148         clock = pygame.time.Clock()
 149         pygame.display.flip()
 150         pygame.mouse.set_visible(False)
 151
 152         previousTicks = self.lfr.getFirstEventTicks()
 153         eIter = self.lfr.getEventsIterator()
 154
 155         for ticks, eventName, message in eIter :
 156             t0 = pygame.time.get_ticks()
 157             ticks = int(ticks)
 158             if eventName == 'COLSTATECHANGE' :
 159                 parts = message.split(None, 4)
 160                 if len(parts) == 4 :
 161                     parts.append('')
 162                 index, state, midi, name, syllabus = parts
 163                 index = int(index)
 164                 midi = int(midi)
 165                 state = state == 'True'
 166                 col = self.columns[midi]
 167                 col.update(state, syllabus=syllabus.decode('utf-8'))
 168
 169             elif eventName == 'NOTEON':
 170                 chan, key, vel = [int(v) for v in message.split(None, 2)]
 171                 self.synth.noteon(chan, key, vel)
 172
 173             elif eventName == 'NOTEOFF':
 174                 chan, key = [int(v) for v in message.split(None, 1)]
 175                 self.synth.noteoff(chan, key)
 176
 177
 178             pygame.event.clear() # à virer
 179             #EventDispatcher.dispatchEvents()
 180
 181             dirty = self.draw(pygame.display.get_surface())
 182             pygame.display.update(dirty)
 183             execTime = pygame.time.get_ticks() - t0
 184
 185             delay = ticks - previousTicks - execTime
 186             if delay > 0 :
 187                 pygame.time.wait(delay)
 188
 189             previousTicks = ticks
 190             #print ticks, eventName, message
 191
 192         #while self._running :
 193         #    EventDispatcher.dispatchEvents()
 194         #    dirty = self.draw(pygame.display.get_surface())
 195         #    pygame.display.update(dirty)
 196         #    clock.tick()
 197
 198