108 lines
3.3 KiB
C
108 lines
3.3 KiB
C
/* Copyright (c) 2007-2008 CSIRO
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Copyright (c) 2007-2009 Xiph.Org Foundation
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Written by Jean-Marc Valin */
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/*
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef RATE_H
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#define RATE_H
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#define MAX_PSEUDO 40
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#define LOG_MAX_PSEUDO 6
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#define MAX_PULSES 128
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#define MAX_FINE_BITS 8
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#define FINE_OFFSET 21
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#define QTHETA_OFFSET 4
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#define QTHETA_OFFSET_TWOPHASE 16
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#define BITOVERFLOW 30000
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#include "cwrs.h"
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#include "modes.h"
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void compute_pulse_cache(CELTMode *m, int LM);
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static inline int get_pulses(int i)
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{
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return i<8 ? i : (8 + (i&7)) << ((i>>3)-1);
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}
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static inline int bits2pulses(const CELTMode *m, int band, int LM, int bits)
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{
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int i;
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int lo, hi;
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const unsigned char *cache;
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LM++;
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cache = m->cache.bits + m->cache.index[LM*m->nbEBands+band];
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lo = 0;
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hi = cache[0];
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bits--;
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for (i=0;i<LOG_MAX_PSEUDO;i++)
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{
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int mid = (lo+hi+1)>>1;
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/* OPT: Make sure this is implemented with a conditional move */
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if (cache[mid] >= bits)
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hi = mid;
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else
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lo = mid;
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}
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if (bits- (lo == 0 ? -1 : cache[lo]) <= cache[hi]-bits)
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return lo;
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else
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return hi;
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}
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static inline int pulses2bits(const CELTMode *m, int band, int LM, int pulses)
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{
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const unsigned char *cache;
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LM++;
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cache = m->cache.bits + m->cache.index[LM*m->nbEBands+band];
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return pulses == 0 ? 0 : cache[pulses]+1;
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}
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/** Computes a cache of the pulses->bits mapping in each band */
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celt_int16 **compute_alloc_cache(CELTMode *m, int M);
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/** Compute the pulse allocation, i.e. how many pulses will go in each
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* band.
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@param m mode
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@param offsets Requested increase or decrease in the number of bits for
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each band
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@param total Number of bands
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@param pulses Number of pulses per band (returned)
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@return Total number of bits allocated
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*/
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int compute_allocation(const CELTMode *m, int start, int end, const int *offsets, const int *cap, int alloc_trim, int *intensity, int *dual_stero,
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celt_int32 total, celt_int32 *balance, int *pulses, int *ebits, int *fine_priority, int _C, int LM, ec_ctx *ec, int encode, int prev);
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#endif
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