def testMaxAudioWithBaselineShift(self): low_base = b"".join(["\x10\x00\x01\x00"] * 100) higher_base = b"".join(["\x01\x00\x00\x01"] * 100) source = MockSource() for i in range(100): source.stream.inject(low_base) source.stream.inject(higher_base) recognizer = ResponsiveRecognizer(None) sec_per_buffer = float(source.CHUNK) / (source.SAMPLE_RATE * source.SAMPLE_WIDTH) test_seconds = 30.0 while test_seconds > 0: test_seconds -= sec_per_buffer data = source.stream.read(source.CHUNK) energy = recognizer.calc_energy(data, source.SAMPLE_WIDTH) recognizer.adjust_threshold(energy, sec_per_buffer) higher_base_energy = audioop.rms(higher_base, source.SAMPLE_WIDTH) # after recalibration (because of max audio length) new threshold # should be >= 1.5 * higher_base_energy delta_below_threshold = ( recognizer.energy_threshold - higher_base_energy) min_delta = higher_base_energy * .5 assert abs(delta_below_threshold - min_delta) < 1
def testMaxAudioWithBaselineShift(self): low_base = b"".join(["\x10\x00\x01\x00"] * 100) higher_base = b"".join(["\x01\x00\x00\x01"] * 100) source = MockSource() for i in xrange(100): source.stream.inject(low_base) source.stream.inject(higher_base) recognizer = ResponsiveRecognizer(None) sec_per_buffer = float( source.CHUNK) / (source.SAMPLE_RATE * source.SAMPLE_WIDTH) test_seconds = 30.0 while test_seconds > 0: test_seconds -= sec_per_buffer data = source.stream.read(source.CHUNK) energy = recognizer.calc_energy(data, source.SAMPLE_WIDTH) recognizer.adjust_threshold(energy, sec_per_buffer) higher_base_energy = audioop.rms(higher_base, source.SAMPLE_WIDTH) # after recalibration (because of max audio length) new threshold # should be >= 1.5 * higher_base_energy delta_below_threshold = (recognizer.energy_threshold - higher_base_energy) min_delta = higher_base_energy * .5 assert abs(delta_below_threshold - min_delta) < 1