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1 /* Copyright (c) 2007-2008 CSIRO | 1 /* Copyright (c) 2007-2008 CSIRO |
2 Copyright (c) 2007-2009 Xiph.Org Foundation | 2 Copyright (c) 2007-2009 Xiph.Org Foundation |
3 Written by Jean-Marc Valin */ | 3 Written by Jean-Marc Valin */ |
4 /** | 4 /** |
5 @file vq.h | 5 @file vq.h |
6 @brief Vector quantisation of the residual | 6 @brief Vector quantisation of the residual |
7 */ | 7 */ |
8 /* | 8 /* |
9 Redistribution and use in source and binary forms, with or without | 9 Redistribution and use in source and binary forms, with or without |
10 modification, are permitted provided that the following conditions | 10 modification, are permitted provided that the following conditions |
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33 #ifndef VQ_H | 33 #ifndef VQ_H |
34 #define VQ_H | 34 #define VQ_H |
35 | 35 |
36 #include "entenc.h" | 36 #include "entenc.h" |
37 #include "entdec.h" | 37 #include "entdec.h" |
38 #include "modes.h" | 38 #include "modes.h" |
39 | 39 |
40 /** Algebraic pulse-vector quantiser. The signal x is replaced by the sum of | 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 | 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. | 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) | 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 | 44 * @param N Number of samples to encode |
46 * @param K Number of pulses to use | 45 * @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 | 46 * @param enc Entropy encoder state |
49 * @ret A mask indicating which blocks in the band received pulses | 47 * @ret A mask indicating which blocks in the band received pulses |
50 */ | 48 */ |
51 unsigned alg_quant(celt_norm *X, int N, int K, int spread, int B, | 49 unsigned alg_quant(celt_norm *X, int N, int K, int spread, int B, |
52 ec_enc *enc | 50 ec_enc *enc |
53 #ifdef RESYNTH | 51 #ifdef RESYNTH |
54 , opus_val16 gain | 52 , opus_val16 gain |
55 #endif | 53 #endif |
56 ); | 54 ); |
57 | 55 |
58 /** Algebraic pulse decoder | 56 /** Algebraic pulse decoder |
59 * @param x Decoded normalised spectrum (returned) | 57 * @param X Decoded normalised spectrum (returned) |
60 * @param N Number of samples to decode | 58 * @param N Number of samples to decode |
61 * @param K Number of pulses to use | 59 * @param K Number of pulses to use |
62 * @param p Pitch vector (automatically added to x) | |
63 * @param dec Entropy decoder state | 60 * @param dec Entropy decoder state |
64 * @ret A mask indicating which blocks in the band received pulses | 61 * @ret A mask indicating which blocks in the band received pulses |
65 */ | 62 */ |
66 unsigned alg_unquant(celt_norm *X, int N, int K, int spread, int B, | 63 unsigned alg_unquant(celt_norm *X, int N, int K, int spread, int B, |
67 ec_dec *dec, opus_val16 gain); | 64 ec_dec *dec, opus_val16 gain); |
68 | 65 |
69 void renormalise_vector(celt_norm *X, int N, opus_val16 gain); | 66 void renormalise_vector(celt_norm *X, int N, opus_val16 gain); |
70 | 67 |
71 int stereo_itheta(celt_norm *X, celt_norm *Y, int stereo, int N); | 68 int stereo_itheta(celt_norm *X, celt_norm *Y, int stereo, int N); |
72 | 69 |
73 #endif /* VQ_H */ | 70 #endif /* VQ_H */ |
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