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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 #if defined(MIPSr1_ASM)
41 #include "mips/vq_mipsr1.h"
42 #endif
43 
44 
45 /** Algebraic pulse-vector quantiser. The signal x is replaced by the sum of
46   * the pitch and a combination of pulses such that its norm is still equal
47   * to 1. This is the function that will typically require the most CPU.
48  * @param X Residual signal to quantise/encode (returns quantised version)
49  * @param N Number of samples to encode
50  * @param K Number of pulses to use
51  * @param enc Entropy encoder state
52  * @ret A mask indicating which blocks in the band received pulses
53 */
54 unsigned alg_quant(celt_norm *X, int N, int K, int spread, int B,
55       ec_enc *enc
56 #ifdef RESYNTH
57       , opus_val16 gain
58 #endif
59       );
60 
61 /** Algebraic pulse decoder
62  * @param X Decoded normalised spectrum (returned)
63  * @param N Number of samples to decode
64  * @param K Number of pulses to use
65  * @param dec Entropy decoder state
66  * @ret A mask indicating which blocks in the band received pulses
67  */
68 unsigned alg_unquant(celt_norm *X, int N, int K, int spread, int B,
69       ec_dec *dec, opus_val16 gain);
70 
71 void renormalise_vector(celt_norm *X, int N, opus_val16 gain, int arch);
72 
73 int stereo_itheta(const celt_norm *X, const celt_norm *Y, int stereo, int N, int arch);
74 
75 #endif /* VQ_H */
76