def run(self, channels=None, samplerate=None, blocksize=None, stack=None):
"""Setup/reset all processors in cascade and stream audio data along
the pipe. Also returns the pipe itself."""
source = self.processors[0]
items = self.processors[1:]
source.setup(channels=channels, samplerate=samplerate,
blocksize=blocksize)
if stack is None:
self.stack = False
else:
self.stack = stack
if self.stack:
self.frames_stack = []
last = source
# setup/reset processors and configure properties throughout the pipe
for item in items:
item.source_mediainfo = source.mediainfo()
item.setup(channels=last.channels(),
samplerate=last.samplerate(),
blocksize=last.blocksize(),
totalframes=last.totalframes())
last = item
# now stream audio data along the pipe
eod = False
while not eod:
frames, eod = source.process()
if self.stack:
self.frames_stack.append(frames)
for item in items:
frames, eod = item.process(frames, eod)
# Post-processing
for item in items:
item.post_process()
# Release processors
if self.stack:
if not isinstance(self.frames_stack, numpy.ndarray):
self.frames_stack = numpy.vstack(self.frames_stack)
from timeside.decoder.core import ArrayDecoder
new_source = ArrayDecoder(samples=self.frames_stack,
samplerate=source.samplerate())
new_source.setup(channels=source.channels(),
samplerate=source.samplerate(),
blocksize=source.blocksize())
self.processors[0] = new_source
for item in items:
item.release()
self.processors.remove(item)
def tearDown(self):
decoder = ArrayDecoder(samples=self.source,
samplerate=self.source_samplerate,
start=self.start,
duration=self.duration)
decoder.setup(samplerate=self.samplerate, channels=self.channels,
blocksize=self.blocksize)
# Check input
self.assertEqual(self.source_samplerate, decoder.input_samplerate)
self.assertEqual(self.expected_is_segment, decoder.is_segment)
self.assertEqual(self.expected_duration, decoder.input_duration)
self.assertEqual(self.source_channels, decoder.input_channels)
# Check output
self.assertEqual(self.source_samplerate, decoder.samplerate())
self.assertEqual(self.source_channels, decoder.channels())
# Check Idecoder interface
self.assertIsInstance(decoder.mediainfo(), dict)
self.assertIsInstance(decoder.format(), str)
self.assertIsInstance(decoder.encoding(), str)
self.assertIsInstance(decoder.resolution(), int)
self.assertIsNone(decoder.metadata())
totalframes = 0
while True:
frames, eod = decoder.process()
totalframes += frames.shape[0]
if eod:
break
self.assertEqual(frames.shape[0], decoder.blocksize())
self.assertEqual(frames.shape[1], decoder.channels())
if self.channels:
# when specified, check that the channels are the ones requested
self.assertEqual(self.channels, decoder.output_channels)
else:
# otherwise check that the channels are preserved, if not specified
self.assertEqual(decoder.input_channels, decoder.output_channels)
# and if we know the expected channels, check the output match
if self.source_channels:
self.assertEqual(
self.source_channels, decoder.output_channels)
# do the same with the sampling rate
if self.samplerate:
self.assertEqual(self.samplerate, decoder.output_samplerate)
else:
self.assertEqual(
decoder.input_samplerate, decoder.output_samplerate)
self.assertEqual(totalframes, self.expected_duration * decoder.output_samplerate)
self.assertEquals(totalframes, decoder.totalframes())