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97 lines
3.6 KiB
Python
Executable file
97 lines
3.6 KiB
Python
Executable file
#!/usr/bin/python3
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'''Copyright (c) 2018 Mozilla
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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'''
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import lpcnet
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import sys
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import numpy as np
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from ulaw import ulaw2lin, lin2ulaw
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import h5py
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model, enc, dec = lpcnet.new_lpcnet_model()
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model.compile(optimizer='adam', loss='sparse_categorical_crossentropy', metrics=['sparse_categorical_accuracy'])
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#model.summary()
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feature_file = sys.argv[1]
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out_file = sys.argv[2]
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frame_size = model.frame_size
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nb_features = 36
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nb_used_features = model.nb_used_features
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features = np.fromfile(feature_file, dtype='float32')
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features = np.resize(features, (-1, nb_features))
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nb_frames = 1
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feature_chunk_size = features.shape[0]
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pcm_chunk_size = frame_size*feature_chunk_size
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features = np.reshape(features, (nb_frames, feature_chunk_size, nb_features))
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periods = (.1 + 50*features[:,:,18:19]+100).astype('int16')
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model.load_weights('lpcnet38Sn_384_02.h5');
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order = 16
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pcm = np.zeros((nb_frames*pcm_chunk_size, ))
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fexc = np.zeros((1, 1, 3), dtype='int16')+128
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state1 = np.zeros((1, model.rnn_units1), dtype='float32')
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state2 = np.zeros((1, model.rnn_units2), dtype='float32')
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mem = 0
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coef = 0.85
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fout = open(out_file, 'wb')
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skip = order + 1
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for c in range(0, nb_frames):
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cfeat = enc.predict([features[c:c+1, :, :nb_used_features], periods[c:c+1, :, :]])
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for fr in range(0, feature_chunk_size):
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f = c*feature_chunk_size + fr
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a = features[c, fr, nb_features-order:]
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for i in range(skip, frame_size):
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pred = -sum(a*pcm[f*frame_size + i - 1:f*frame_size + i - order-1:-1])
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fexc[0, 0, 1] = lin2ulaw(pred)
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p, state1, state2 = dec.predict([fexc, cfeat[:, fr:fr+1, :], state1, state2])
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#Lower the temperature for voiced frames to reduce noisiness
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p *= np.power(p, np.maximum(0, 1.5*features[c, fr, 19] - .5))
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p = p/(1e-18 + np.sum(p))
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#Cut off the tail of the remaining distribution
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p = np.maximum(p-0.002, 0).astype('float64')
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p = p/(1e-8 + np.sum(p))
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fexc[0, 0, 2] = np.argmax(np.random.multinomial(1, p[0,0,:], 1))
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pcm[f*frame_size + i] = pred + ulaw2lin(fexc[0, 0, 2])
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fexc[0, 0, 0] = lin2ulaw(pcm[f*frame_size + i])
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mem = coef*mem + pcm[f*frame_size + i]
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#print(mem)
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np.array([np.round(mem)], dtype='int16').tofile(fout)
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skip = 0
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