1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/libopus/celt/rate.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,101 @@
1.4 +/* Copyright (c) 2007-2008 CSIRO
1.5 + Copyright (c) 2007-2009 Xiph.Org Foundation
1.6 + Written by Jean-Marc Valin */
1.7 +/*
1.8 + Redistribution and use in source and binary forms, with or without
1.9 + modification, are permitted provided that the following conditions
1.10 + are met:
1.11 +
1.12 + - Redistributions of source code must retain the above copyright
1.13 + notice, this list of conditions and the following disclaimer.
1.14 +
1.15 + - Redistributions in binary form must reproduce the above copyright
1.16 + notice, this list of conditions and the following disclaimer in the
1.17 + documentation and/or other materials provided with the distribution.
1.18 +
1.19 + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
1.20 + ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
1.21 + LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
1.22 + A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
1.23 + OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
1.24 + EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
1.25 + PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
1.26 + PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
1.27 + LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
1.28 + NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
1.29 + SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.30 +*/
1.31 +
1.32 +#ifndef RATE_H
1.33 +#define RATE_H
1.34 +
1.35 +#define MAX_PSEUDO 40
1.36 +#define LOG_MAX_PSEUDO 6
1.37 +
1.38 +#define MAX_PULSES 128
1.39 +
1.40 +#define MAX_FINE_BITS 8
1.41 +
1.42 +#define FINE_OFFSET 21
1.43 +#define QTHETA_OFFSET 4
1.44 +#define QTHETA_OFFSET_TWOPHASE 16
1.45 +
1.46 +#include "cwrs.h"
1.47 +#include "modes.h"
1.48 +
1.49 +void compute_pulse_cache(CELTMode *m, int LM);
1.50 +
1.51 +static OPUS_INLINE int get_pulses(int i)
1.52 +{
1.53 + return i<8 ? i : (8 + (i&7)) << ((i>>3)-1);
1.54 +}
1.55 +
1.56 +static OPUS_INLINE int bits2pulses(const CELTMode *m, int band, int LM, int bits)
1.57 +{
1.58 + int i;
1.59 + int lo, hi;
1.60 + const unsigned char *cache;
1.61 +
1.62 + LM++;
1.63 + cache = m->cache.bits + m->cache.index[LM*m->nbEBands+band];
1.64 +
1.65 + lo = 0;
1.66 + hi = cache[0];
1.67 + bits--;
1.68 + for (i=0;i<LOG_MAX_PSEUDO;i++)
1.69 + {
1.70 + int mid = (lo+hi+1)>>1;
1.71 + /* OPT: Make sure this is implemented with a conditional move */
1.72 + if ((int)cache[mid] >= bits)
1.73 + hi = mid;
1.74 + else
1.75 + lo = mid;
1.76 + }
1.77 + if (bits- (lo == 0 ? -1 : (int)cache[lo]) <= (int)cache[hi]-bits)
1.78 + return lo;
1.79 + else
1.80 + return hi;
1.81 +}
1.82 +
1.83 +static OPUS_INLINE int pulses2bits(const CELTMode *m, int band, int LM, int pulses)
1.84 +{
1.85 + const unsigned char *cache;
1.86 +
1.87 + LM++;
1.88 + cache = m->cache.bits + m->cache.index[LM*m->nbEBands+band];
1.89 + return pulses == 0 ? 0 : cache[pulses]+1;
1.90 +}
1.91 +
1.92 +/** Compute the pulse allocation, i.e. how many pulses will go in each
1.93 + * band.
1.94 + @param m mode
1.95 + @param offsets Requested increase or decrease in the number of bits for
1.96 + each band
1.97 + @param total Number of bands
1.98 + @param pulses Number of pulses per band (returned)
1.99 + @return Total number of bits allocated
1.100 +*/
1.101 +int compute_allocation(const CELTMode *m, int start, int end, const int *offsets, const int *cap, int alloc_trim, int *intensity, int *dual_stero,
1.102 + opus_int32 total, opus_int32 *balance, int *pulses, int *ebits, int *fine_priority, int C, int LM, ec_ctx *ec, int encode, int prev, int signalBandwidth);
1.103 +
1.104 +#endif
