def do_POST(self):
"""All post requests are sent using AJAX from the web app. The requests
should contain one waveform file to be parsed and added to the pattern
dictionary. After the file is parsed, an output wavform will be sent."""
try:
# get the form data
form = cgi.FieldStorage(
fp=self.rfile,
headers=self.headers,
environ={'REQUEST_METHOD':'POST',
'CONTENT_TYPE':self.headers['Content-Type'],
})
# create a new generator object
g = generator.Generator()
# load pickle data into the generator
if os.path.exists("pattern-data.pickle"):
g.pattern_dictionary = pickle.load(open("pattern-data.pickle", "rb" ))
# if the user submitted a file, add it to the generator's dictionary
f = form['file'].file
f.seek(0, 2)
if f.tell() > 0:
print "Success: A valid input file was received."
f.seek(0,0)
g.add_wave(f)
else:
print "Warning: No valid file was received."
# dump the data into a pickle file
pickle.dump(g.pattern_dictionary, open("pattern-data.pickle", "wb"))
# build an output song
print "Loaded Pattern Dictionary. Generating Song"
output = StringIO.StringIO()
waveform.to_file(output, waveform.from_string(str(g.run())))
print "Song Finished"
# send header and body encoded in base64, which is what the web app
# is using
self.send_response(200)
self.send_header("Content-type", "application/octet-stream")
self.end_headers()
self.wfile.write(base64.b64encode(output.getvalue()))
except:
print "Unexpected error:", sys.exc_info()[0]
raise
songsmith.Note(songsmith.nametofreq("E4"), 0.5, 8000)
]),
songsmith.Chord(notes=[
songsmith.Note(songsmith.nametofreq("C4"), 0.5, 8000),
songsmith.Note(songsmith.nametofreq("E4"), 0.5, 8000),
songsmith.Note(songsmith.nametofreq("G4"), 0.5, 8000)
]),
songsmith.Chord(notes=[
songsmith.Note(songsmith.nametofreq("C4"), 1.5, 8000),
songsmith.Note(songsmith.nametofreq("E4"), 1.5, 8000),
songsmith.Note(songsmith.nametofreq("G4"), 1.5, 8000),
songsmith.Note(songsmith.nametofreq("C5"), 1.5, 8000)
])
])
song.addovertones(5)
return str(song)
def TEST3():
""" Returns a 16-bit string audio waveform to test musical beats"""
return str(songsmith.Phrase(chords=[
songsmith.Chord(notes=[
songsmith.Note(220, 20.0, 16000),
songsmith.Note(220.2, 20.0, 16000)
])
]))
if __name__=="__main__":
player.play(waveform.from_string(TEST1()))
player.play(waveform.from_string(TEST2()))
player.play(waveform.from_string(TEST3()))
