src/mxmMidi/MidiInFile.py

   1 # -*- coding: ISO-8859-1 -*-
   2
   3 from RawInstreamFile import RawInstreamFile
   4 from MidiFileParser import MidiFileParser
   5
   6
   7 class MidiInFile:
   8
   9     """
  10
  11     Parses a midi file, and triggers the midi events on the outStream
  12     object.
  13
  14     Get example data from a minimal midi file, generated with cubase.
  15     >>> test_file = 'C:/Documents and Settings/maxm/Desktop/temp/midi/src/midi/tests/midifiles/minimal-cubase-type0.mid'
  16
  17     Do parsing, and generate events with MidiToText,
  18     so we can see what a minimal midi file contains
  19     >>> from MidiToText import MidiToText
  20     >>> midi_in = MidiInFile(MidiToText(), test_file)
  21     >>> midi_in.read()
  22     format: 0, nTracks: 1, division: 480
  23     ----------------------------------
  24     <BLANKLINE>
  25     Start - track #0
  26     sequence_name: Type 0
  27     tempo: 500000
  28     time_signature: 4 2 24 8
  29     note_on  - ch:00,  note:48,  vel:64 time:0
  30     note_off - ch:00,  note:48,  vel:40 time:480
  31     End of track
  32     <BLANKLINE>
  33     End of file
  34
  35
  36     """
  37
  38     def __init__(self, outStream, infile):
  39         # these could also have been mixins, would that be better? Nah!
  40         self.raw_in = RawInstreamFile(infile)
  41         self.parser = MidiFileParser(self.raw_in, outStream)
  42
  43
  44     def read(self):
  45         "Start parsing the file"
  46         p = self.parser
  47         p.parseMThdChunk()
  48         p.parseMTrkChunks()
  49
  50
  51     def setData(self, data=''):
  52         "Sets the data from a plain string"
  53         self.raw_in.setData(data)
  54
  55