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annotate src/opus-1.3/celt/rate.h @ 73:02caadb7509e

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Rebuild with --disable-stack-protector for mingw32
author Chris Cannam
date Fri, 25 Jan 2019 14:31:07 +0000
parents 7aeed7906520
children
rev   line source
Chris@69 1 /* Copyright (c) 2007-2008 CSIRO
Chris@69 2 Copyright (c) 2007-2009 Xiph.Org Foundation
Chris@69 3 Written by Jean-Marc Valin */
Chris@69 4 /*
Chris@69 5 Redistribution and use in source and binary forms, with or without
Chris@69 6 modification, are permitted provided that the following conditions
Chris@69 7 are met:
Chris@69 8
Chris@69 9 - Redistributions of source code must retain the above copyright
Chris@69 10 notice, this list of conditions and the following disclaimer.
Chris@69 11
Chris@69 12 - Redistributions in binary form must reproduce the above copyright
Chris@69 13 notice, this list of conditions and the following disclaimer in the
Chris@69 14 documentation and/or other materials provided with the distribution.
Chris@69 15
Chris@69 16 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
Chris@69 17 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
Chris@69 18 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
Chris@69 19 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
Chris@69 20 OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
Chris@69 21 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
Chris@69 22 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
Chris@69 23 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
Chris@69 24 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
Chris@69 25 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
Chris@69 26 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Chris@69 27 */
Chris@69 28
Chris@69 29 #ifndef RATE_H
Chris@69 30 #define RATE_H
Chris@69 31
Chris@69 32 #define MAX_PSEUDO 40
Chris@69 33 #define LOG_MAX_PSEUDO 6
Chris@69 34
Chris@69 35 #define CELT_MAX_PULSES 128
Chris@69 36
Chris@69 37 #define MAX_FINE_BITS 8
Chris@69 38
Chris@69 39 #define FINE_OFFSET 21
Chris@69 40 #define QTHETA_OFFSET 4
Chris@69 41 #define QTHETA_OFFSET_TWOPHASE 16
Chris@69 42
Chris@69 43 #include "cwrs.h"
Chris@69 44 #include "modes.h"
Chris@69 45
Chris@69 46 void compute_pulse_cache(CELTMode *m, int LM);
Chris@69 47
Chris@69 48 static OPUS_INLINE int get_pulses(int i)
Chris@69 49 {
Chris@69 50 return i<8 ? i : (8 + (i&7)) << ((i>>3)-1);
Chris@69 51 }
Chris@69 52
Chris@69 53 static OPUS_INLINE int bits2pulses(const CELTMode *m, int band, int LM, int bits)
Chris@69 54 {
Chris@69 55 int i;
Chris@69 56 int lo, hi;
Chris@69 57 const unsigned char *cache;
Chris@69 58
Chris@69 59 LM++;
Chris@69 60 cache = m->cache.bits + m->cache.index[LM*m->nbEBands+band];
Chris@69 61
Chris@69 62 lo = 0;
Chris@69 63 hi = cache[0];
Chris@69 64 bits--;
Chris@69 65 for (i=0;i<LOG_MAX_PSEUDO;i++)
Chris@69 66 {
Chris@69 67 int mid = (lo+hi+1)>>1;
Chris@69 68 /* OPT: Make sure this is implemented with a conditional move */
Chris@69 69 if ((int)cache[mid] >= bits)
Chris@69 70 hi = mid;
Chris@69 71 else
Chris@69 72 lo = mid;
Chris@69 73 }
Chris@69 74 if (bits- (lo == 0 ? -1 : (int)cache[lo]) <= (int)cache[hi]-bits)
Chris@69 75 return lo;
Chris@69 76 else
Chris@69 77 return hi;
Chris@69 78 }
Chris@69 79
Chris@69 80 static OPUS_INLINE int pulses2bits(const CELTMode *m, int band, int LM, int pulses)
Chris@69 81 {
Chris@69 82 const unsigned char *cache;
Chris@69 83
Chris@69 84 LM++;
Chris@69 85 cache = m->cache.bits + m->cache.index[LM*m->nbEBands+band];
Chris@69 86 return pulses == 0 ? 0 : cache[pulses]+1;
Chris@69 87 }
Chris@69 88
Chris@69 89 /** Compute the pulse allocation, i.e. how many pulses will go in each
Chris@69 90 * band.
Chris@69 91 @param m mode
Chris@69 92 @param offsets Requested increase or decrease in the number of bits for
Chris@69 93 each band
Chris@69 94 @param total Number of bands
Chris@69 95 @param pulses Number of pulses per band (returned)
Chris@69 96 @return Total number of bits allocated
Chris@69 97 */
Chris@69 98 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,
Chris@69 99 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);
Chris@69 100
Chris@69 101 #endif