media/libopus/celt/vq.h@6474c204b198 (annotated)
media/libopus/celt/vq.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* Copyright (c) 2007-2008 CSIRO |
| michael@0 | 2 | Copyright (c) 2007-2009 Xiph.Org Foundation |
| michael@0 | 3 | Written by Jean-Marc Valin */ |
| michael@0 | 4 | /** |
| michael@0 | 5 | @file vq.h |
| michael@0 | 6 | @brief Vector quantisation of the residual |
| michael@0 | 7 | */ |
| michael@0 | 8 | /* |
| michael@0 | 9 | Redistribution and use in source and binary forms, with or without |
| michael@0 | 10 | modification, are permitted provided that the following conditions |
| michael@0 | 11 | are met: |
| michael@0 | 12 | |
| michael@0 | 13 | - Redistributions of source code must retain the above copyright |
| michael@0 | 14 | notice, this list of conditions and the following disclaimer. |
| michael@0 | 15 | |
| michael@0 | 16 | - Redistributions in binary form must reproduce the above copyright |
| michael@0 | 17 | notice, this list of conditions and the following disclaimer in the |
| michael@0 | 18 | documentation and/or other materials provided with the distribution. |
| michael@0 | 19 | |
| michael@0 | 20 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| michael@0 | 21 | ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| michael@0 | 22 | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| michael@0 | 23 | A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER |
| michael@0 | 24 | OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| michael@0 | 25 | EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| michael@0 | 26 | PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| michael@0 | 27 | PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| michael@0 | 28 | LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| michael@0 | 29 | NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| michael@0 | 30 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| michael@0 | 31 | */ |
| michael@0 | 32 | |
| michael@0 | 33 | #ifndef VQ_H |
| michael@0 | 34 | #define VQ_H |
| michael@0 | 35 | |
| michael@0 | 36 | #include "entenc.h" |
| michael@0 | 37 | #include "entdec.h" |
| michael@0 | 38 | #include "modes.h" |
| michael@0 | 39 | |
| michael@0 | 40 | /** Algebraic pulse-vector quantiser. The signal x is replaced by the sum of |
| michael@0 | 41 | * the pitch and a combination of pulses such that its norm is still equal |
| michael@0 | 42 | * to 1. This is the function that will typically require the most CPU. |
| michael@0 | 43 | * @param X Residual signal to quantise/encode (returns quantised version) |
| michael@0 | 44 | * @param N Number of samples to encode |
| michael@0 | 45 | * @param K Number of pulses to use |
| michael@0 | 46 | * @param enc Entropy encoder state |
| michael@0 | 47 | * @ret A mask indicating which blocks in the band received pulses |
| michael@0 | 48 | */ |
| michael@0 | 49 | unsigned alg_quant(celt_norm *X, int N, int K, int spread, int B, |
| michael@0 | 50 | ec_enc *enc |
| michael@0 | 51 | #ifdef RESYNTH |
| michael@0 | 52 | , opus_val16 gain |
| michael@0 | 53 | #endif |
| michael@0 | 54 | ); |
| michael@0 | 55 | |
| michael@0 | 56 | /** Algebraic pulse decoder |
| michael@0 | 57 | * @param X Decoded normalised spectrum (returned) |
| michael@0 | 58 | * @param N Number of samples to decode |
| michael@0 | 59 | * @param K Number of pulses to use |
| michael@0 | 60 | * @param dec Entropy decoder state |
| michael@0 | 61 | * @ret A mask indicating which blocks in the band received pulses |
| michael@0 | 62 | */ |
| michael@0 | 63 | unsigned alg_unquant(celt_norm *X, int N, int K, int spread, int B, |
| michael@0 | 64 | ec_dec *dec, opus_val16 gain); |
| michael@0 | 65 | |
| michael@0 | 66 | void renormalise_vector(celt_norm *X, int N, opus_val16 gain); |
| michael@0 | 67 | |
| michael@0 | 68 | int stereo_itheta(celt_norm *X, celt_norm *Y, int stereo, int N); |
| michael@0 | 69 | |
| michael@0 | 70 | #endif /* VQ_H */ |
