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 CELT_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
get_pulses(int i)48 static OPUS_INLINE int get_pulses(int i)
49 {
50 return i<8 ? i : (8 + (i&7)) << ((i>>3)-1);
51 }
52
bits2pulses(const CELTMode * m,int band,int LM,int bits)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
pulses2bits(const CELTMode * m,int band,int LM,int pulses)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 clt_compute_allocation(const CELTMode *m, int start, int end, const int *offsets, const int *cap, int alloc_trim, int *intensity, int *dual_stereo,
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