/* Copyright (c) 2007-2008 CSIRO
Copyright (c) 2007-2009 Xiph.Org Foundation
Written by Jean-Marc Valin */
/**
@file vq.h
@brief Vector quantisation of the residual
*/
/*
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this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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*/
#ifndef VQ_H
#define VQ_H
#include "entenc.h"
#include "entdec.h"
#include "modes.h"
/** Algebraic pulse-vector quantiser. The signal x is replaced by the sum of
* the pitch and a combination of pulses such that its norm is still equal
* to 1. This is the function that will typically require the most CPU.
* @param x Residual signal to quantise/encode (returns quantised version)
* @param W Perceptual weight to use when optimising (currently unused)
* @param N Number of samples to encode
* @param K Number of pulses to use
* @param p Pitch vector (it is assumed that p+x is a unit vector)
* @param enc Entropy encoder state
* @ret A mask indicating which blocks in the band received pulses
*/
unsigned alg_quant(celt_norm *X, int N, int K, int spread, int B,
int resynth, ec_enc *enc, celt_word16 gain);
/** Algebraic pulse decoder
* @param x Decoded normalised spectrum (returned)
* @param N Number of samples to decode
* @param K Number of pulses to use
* @param p Pitch vector (automatically added to x)
* @param dec Entropy decoder state
* @ret A mask indicating which blocks in the band received pulses
*/
unsigned alg_unquant(celt_norm *X, int N, int K, int spread, int B,
ec_dec *dec, celt_word16 gain);
void renormalise_vector(celt_norm *X, int N, celt_word16 gain);
int stereo_itheta(celt_norm *X, celt_norm *Y, int stereo, int N);
#endif /* VQ_H */