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comparison: media/libopus/celt/vq.h
media/libopus/celt/vq.h
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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 /** 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 */ | |
| 49 unsigned 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 */ | |
| 63 unsigned alg_unquant(celt_norm *X, int N, int K, int spread, int B, | |
| 64 ec_dec *dec, opus_val16 gain); | |
| 65 | |
| 66 void renormalise_vector(celt_norm *X, int N, opus_val16 gain); | |
| 67 | |
| 68 int stereo_itheta(celt_norm *X, celt_norm *Y, int stereo, int N); | |
| 69 | |
| 70 #endif /* VQ_H */ |
