1 /* Copyright (c) 2007-2008 CSIRO
2 Copyright (c) 2007-2009 Xiph.Org Foundation
3 Written by Jean-Marc Valin */
6 @brief Vector quantisation of the residual
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10 modification, are permitted provided that the following conditions
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40 /** Algebraic pulse-vector quantiser. The signal x is replaced by the sum of
41 * the pitch and a combination of pulses such that its norm is still equal
42 * to 1. This is the function that will typically require the most CPU.
43 * @param x Residual signal to quantise/encode (returns quantised version)
44 * @param W Perceptual weight to use when optimising (currently unused)
45 * @param N Number of samples to encode
46 * @param K Number of pulses to use
47 * @param p Pitch vector (it is assumed that p+x is a unit vector)
48 * @param enc Entropy encoder state
49 * @ret A mask indicating which blocks in the band received pulses
51 unsigned alg_quant(celt_norm *X, int N, int K, int spread, int B,
58 /** Algebraic pulse decoder
59 * @param x Decoded normalised spectrum (returned)
60 * @param N Number of samples to decode
61 * @param K Number of pulses to use
62 * @param p Pitch vector (automatically added to x)
63 * @param dec Entropy decoder state
64 * @ret A mask indicating which blocks in the band received pulses
66 unsigned alg_unquant(celt_norm *X, int N, int K, int spread, int B,
67 ec_dec *dec, opus_val16 gain);
69 void renormalise_vector(celt_norm *X, int N, opus_val16 gain);
71 int stereo_itheta(celt_norm *X, celt_norm *Y, int stereo, int N);