def demo4(appURL):
"""
Generate a wavefrom from a raw PCM file using the
AudioServerRequest object to call the web server.
"""
# define header spec
headerSpec = HeaderSpec("fmt=pcm,width=16,channels=1,rate=48000")
# create request
req = AudioServerRequest(filePath=EXAMPLE_PCM_FILE, headerSpec=headerSpec)
# create destination
destination = os.path.join(OUTPUT_DIR, "demo4.png")
fp = open(destination, "w")
# use the retrieve function to call the web server
AudioServerRequest.retrieve(fp, req.buildURL(appURL, "waveform"))
fp.close()
print "Waveform image saved at: %s" %destination
def demo5(appURL): """ Convert a file to mp3 and validate the request. """ # define settings (either use create or instantiate) settings = MP3Settings(bitRate=96) # create request req = AudioServerRequest(filePath=EXAMPLE_WAV_FILE, settings=settings) req.validate(MP3Settings) # create destination destination = os.path.join(OUTPUT_DIR, "demo5.mp3") fp = open(destination, "w") # calling the object uses the retrieve function (same as above) req(fp, appURL, "mp3") fp.close() print "MP3 file saved at: %r" %destination
def waveform(data):
req = AudioServerRequest.decode(data)
req.validate(WaveformSettings)
w = WavFile(req.filePath, req.headerSpec)
fp = StringIO(w.header + w.data)
# translate colour setting
settings = copy.deepcopy(req.settings)
try:
colour = settings["colour"]
except KeyError:
pass
else:
settings.update(WaveformSettings.translateColours(colour))
del settings["colour"]
waveformGenerator = WaveformGenerator(**settings)
waveform = waveformGenerator(fp)
return send_file(StringIO(waveform), mimetype="image/png")
def ogg(data):
req = AudioServerRequest.decode(data)
req.validate(OggSettings)
encoder = OggEncoder()
ogg = encoder(req.filePath, req.headerSpec, **req.settings)
return send_file(StringIO(ogg), mimetype="audio/ogg")
def mp3(data):
req = AudioServerRequest.decode(data)
req.validate(MP3Settings)
encoder = MP3Encoder()
mp3 = encoder(req.filePath, req.headerSpec, **req.settings)
return send_file(StringIO(mp3), mimetype="audio/mpeg3")
