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comparison: media/libopus/celt/rate.h
media/libopus/celt/rate.h
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| 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 OPUS_INLINE int get_pulses(int i) | |
| 49 { | |
| 50 return i<8 ? i : (8 + (i&7)) << ((i>>3)-1); | |
| 51 } | |
| 52 | |
| 53 static OPUS_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 OPUS_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 |
