cannam@154: /* Copyright (c) 2007-2008 CSIRO
cannam@154:    Copyright (c) 2007-2009 Xiph.Org Foundation
cannam@154:    Written by Jean-Marc Valin */
cannam@154: /*
cannam@154:    Redistribution and use in source and binary forms, with or without
cannam@154:    modification, are permitted provided that the following conditions
cannam@154:    are met:
cannam@154: 
cannam@154:    - Redistributions of source code must retain the above copyright
cannam@154:    notice, this list of conditions and the following disclaimer.
cannam@154: 
cannam@154:    - Redistributions in binary form must reproduce the above copyright
cannam@154:    notice, this list of conditions and the following disclaimer in the
cannam@154:    documentation and/or other materials provided with the distribution.
cannam@154: 
cannam@154:    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
cannam@154:    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
cannam@154:    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
cannam@154:    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
cannam@154:    OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
cannam@154:    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
cannam@154:    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
cannam@154:    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
cannam@154:    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
cannam@154:    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
cannam@154:    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
cannam@154: */
cannam@154: 
cannam@154: #ifndef RATE_H
cannam@154: #define RATE_H
cannam@154: 
cannam@154: #define MAX_PSEUDO 40
cannam@154: #define LOG_MAX_PSEUDO 6
cannam@154: 
cannam@154: #define CELT_MAX_PULSES 128
cannam@154: 
cannam@154: #define MAX_FINE_BITS 8
cannam@154: 
cannam@154: #define FINE_OFFSET 21
cannam@154: #define QTHETA_OFFSET 4
cannam@154: #define QTHETA_OFFSET_TWOPHASE 16
cannam@154: 
cannam@154: #include "cwrs.h"
cannam@154: #include "modes.h"
cannam@154: 
cannam@154: void compute_pulse_cache(CELTMode *m, int LM);
cannam@154: 
cannam@154: static OPUS_INLINE int get_pulses(int i)
cannam@154: {
cannam@154:    return i<8 ? i : (8 + (i&7)) << ((i>>3)-1);
cannam@154: }
cannam@154: 
cannam@154: static OPUS_INLINE int bits2pulses(const CELTMode *m, int band, int LM, int bits)
cannam@154: {
cannam@154:    int i;
cannam@154:    int lo, hi;
cannam@154:    const unsigned char *cache;
cannam@154: 
cannam@154:    LM++;
cannam@154:    cache = m->cache.bits + m->cache.index[LM*m->nbEBands+band];
cannam@154: 
cannam@154:    lo = 0;
cannam@154:    hi = cache[0];
cannam@154:    bits--;
cannam@154:    for (i=0;i<LOG_MAX_PSEUDO;i++)
cannam@154:    {
cannam@154:       int mid = (lo+hi+1)>>1;
cannam@154:       /* OPT: Make sure this is implemented with a conditional move */
cannam@154:       if ((int)cache[mid] >= bits)
cannam@154:          hi = mid;
cannam@154:       else
cannam@154:          lo = mid;
cannam@154:    }
cannam@154:    if (bits- (lo == 0 ? -1 : (int)cache[lo]) <= (int)cache[hi]-bits)
cannam@154:       return lo;
cannam@154:    else
cannam@154:       return hi;
cannam@154: }
cannam@154: 
cannam@154: static OPUS_INLINE int pulses2bits(const CELTMode *m, int band, int LM, int pulses)
cannam@154: {
cannam@154:    const unsigned char *cache;
cannam@154: 
cannam@154:    LM++;
cannam@154:    cache = m->cache.bits + m->cache.index[LM*m->nbEBands+band];
cannam@154:    return pulses == 0 ? 0 : cache[pulses]+1;
cannam@154: }
cannam@154: 
cannam@154: /** Compute the pulse allocation, i.e. how many pulses will go in each
cannam@154:   * band.
cannam@154:  @param m mode
cannam@154:  @param offsets Requested increase or decrease in the number of bits for
cannam@154:                 each band
cannam@154:  @param total Number of bands
cannam@154:  @param pulses Number of pulses per band (returned)
cannam@154:  @return Total number of bits allocated
cannam@154: */
cannam@154: int clt_compute_allocation(const CELTMode *m, int start, int end, const int *offsets, const int *cap, int alloc_trim, int *intensity, int *dual_stero,
cannam@154:       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);
cannam@154: 
cannam@154: #endif