1 /* Copyright (c) 2007-2008 CSIRO 2 Copyright (c) 2007-2009 Xiph.Org Foundation 3 Written by Jean-Marc Valin */ 4 /* 5 Redistribution and use in source and binary forms, with or without 6 modification, are permitted provided that the following conditions 7 are met: 8 9 - Redistributions of source code must retain the above copyright 10 notice, this list of conditions and the following disclaimer. 11 12 - Redistributions in binary form must reproduce the above copyright 13 notice, this list of conditions and the following disclaimer in the 14 documentation and/or other materials provided with the distribution. 15 16 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER 20 OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 21 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 22 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 23 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 24 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 25 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 26 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #ifndef RATE_H 30 #define RATE_H 31 32 #define MAX_PSEUDO 40 33 #define LOG_MAX_PSEUDO 6 34 35 #define MAX_PULSES 128 36 37 #define MAX_FINE_BITS 8 38 39 #define FINE_OFFSET 21 40 #define QTHETA_OFFSET 4 41 #define QTHETA_OFFSET_TWOPHASE 16 42 43 #include "cwrs.h" 44 #include "modes.h" 45 46 void compute_pulse_cache(CELTMode *m, int LM); 47 48 static inline int get_pulses(int i) 49 { 50 return i<8 ? i : (8 + (i&7)) << ((i>>3)-1); 51 } 52 53 static inline int bits2pulses(const CELTMode *m, int band, int LM, int bits) 54 { 55 int i; 56 int lo, hi; 57 const unsigned char *cache; 58 59 LM++; 60 cache = m->cache.bits + m->cache.index[LM*m->nbEBands+band]; 61 62 lo = 0; 63 hi = cache[0]; 64 bits--; 65 for (i=0;i<LOG_MAX_PSEUDO;i++) 66 { 67 int mid = (lo+hi+1)>>1; 68 /* OPT: Make sure this is implemented with a conditional move */ 69 if ((int)cache[mid] >= bits) 70 hi = mid; 71 else 72 lo = mid; 73 } 74 if (bits- (lo == 0 ? -1 : (int)cache[lo]) <= (int)cache[hi]-bits) 75 return lo; 76 else 77 return hi; 78 } 79 80 static inline int pulses2bits(const CELTMode *m, int band, int LM, int pulses) 81 { 82 const unsigned char *cache; 83 84 LM++; 85 cache = m->cache.bits + m->cache.index[LM*m->nbEBands+band]; 86 return pulses == 0 ? 0 : cache[pulses]+1; 87 } 88 89 /** Compute the pulse allocation, i.e. how many pulses will go in each 90 * band. 91 @param m mode 92 @param offsets Requested increase or decrease in the number of bits for 93 each band 94 @param total Number of bands 95 @param pulses Number of pulses per band (returned) 96 @return Total number of bits allocated 97 */ 98 int compute_allocation(const CELTMode *m, int start, int end, const int *offsets, const int *cap, int alloc_trim, int *intensity, int *dual_stero, 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); 100 101 #endif 102
