1/* Copyright (c) 2007-2008 CSIRO
2   Copyright (c) 2007-2009 Xiph.Org Foundation
3   Written by Jean-Marc Valin */
4/**
5   @file vq.h
6   @brief Vector quantisation of the residual
7 */
8/*
9   Redistribution and use in source and binary forms, with or without
10   modification, are permitted provided that the following conditions
11   are met:
12
13   - Redistributions of source code must retain the above copyright
14   notice, this list of conditions and the following disclaimer.
15
16   - Redistributions in binary form must reproduce the above copyright
17   notice, this list of conditions and the following disclaimer in the
18   documentation and/or other materials provided with the distribution.
19
20   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
24   OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31*/
32
33#ifndef VQ_H
34#define VQ_H
35
36#include "entenc.h"
37#include "entdec.h"
38#include "modes.h"
39
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 N Number of samples to encode
45 * @param K Number of pulses to use
46 * @param enc Entropy encoder state
47 * @ret A mask indicating which blocks in the band received pulses
48*/
49unsigned alg_quant(celt_norm *X, int N, int K, int spread, int B,
50      ec_enc *enc
51#ifdef RESYNTH
52      , opus_val16 gain
53#endif
54      );
55
56/** Algebraic pulse decoder
57 * @param X Decoded normalised spectrum (returned)
58 * @param N Number of samples to decode
59 * @param K Number of pulses to use
60 * @param dec Entropy decoder state
61 * @ret A mask indicating which blocks in the band received pulses
62 */
63unsigned alg_unquant(celt_norm *X, int N, int K, int spread, int B,
64      ec_dec *dec, opus_val16 gain);
65
66void renormalise_vector(celt_norm *X, int N, opus_val16 gain);
67
68int stereo_itheta(celt_norm *X, celt_norm *Y, int stereo, int N);
69
70#endif /* VQ_H */
71