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gerrit-public.fairphone.software / platform / external / fec / refs/heads/int/13/fp4 / . / viterbi27.c
blob: 554da920e9dabd1aafe3fe0911eafc2239fda5d0 [file] [log] [blame]
Bill Yi4e213d52015-06-23 13:53:11 -0700[diff] [blame]1/* K=7 r=1/2 Viterbi decoder with optional Intel or PowerPC SIMD
2 * Copyright Feb 2004, Phil Karn, KA9Q
3 */
4#include <stdio.h>
5#include <stdlib.h>
6#include <memory.h>
7#include "fec.h"
8
9/* Create a new instance of a Viterbi decoder */
10void *create_viterbi27(int len){
11 find_cpu_mode();
12
13 switch(Cpu_mode){
14 case PORT:
15 default:
16 return create_viterbi27_port(len);
17#ifdef __VEC__
18 case ALTIVEC:
19 return create_viterbi27_av(len);
20#endif
21#ifdef __i386__
22 case MMX:
23 return create_viterbi27_mmx(len);
24 case SSE:
25 return create_viterbi27_sse(len);
26 case SSE2:
27 return create_viterbi27_sse2(len);
28#endif
29 }
30}
31
32void set_viterbi27_polynomial(int polys[2]){
33 switch(Cpu_mode){
34 case PORT:
35 default:
36 set_viterbi27_polynomial_port(polys);
37 break;
38#ifdef __VEC__
39 case ALTIVEC:
40 set_viterbi27_polynomial_av(polys);
41 break;
42#endif
43#ifdef __i386__
44 case MMX:
45 set_viterbi27_polynomial_mmx(polys);
46 break;
47 case SSE:
48 set_viterbi27_polynomial_sse(polys);
49 break;
50 case SSE2:
51 set_viterbi27_polynomial_sse2(polys);
52 break;
53#endif
54 }
55}
56
57/* Initialize Viterbi decoder for start of new frame */
58int init_viterbi27(void *p,int starting_state){
59 switch(Cpu_mode){
60 case PORT:
61 default:
62 return init_viterbi27_port(p,starting_state);
63#ifdef __VEC__
64 case ALTIVEC:
65 return init_viterbi27_av(p,starting_state);
66#endif
67#ifdef __i386__
68 case MMX:
69 return init_viterbi27_mmx(p,starting_state);
70 case SSE:
71 return init_viterbi27_sse(p,starting_state);
72 case SSE2:
73 return init_viterbi27_sse2(p,starting_state);
74#endif
75 }
76}
77
78/* Viterbi chainback */
79int chainback_viterbi27(
80 void *p,
81 unsigned char *data, /* Decoded output data */
82 unsigned int nbits, /* Number of data bits */
83 unsigned int endstate){ /* Terminal encoder state */
84
85 switch(Cpu_mode){
86 case PORT:
87 default:
88 return chainback_viterbi27_port(p,data,nbits,endstate);
89#ifdef __VEC__
90 case ALTIVEC:
91 return chainback_viterbi27_av(p,data,nbits,endstate);
92#endif
93#ifdef __i386__
94 case MMX:
95 return chainback_viterbi27_mmx(p,data,nbits,endstate);
96 case SSE:
97 return chainback_viterbi27_sse(p,data,nbits,endstate);
98 case SSE2:
99 return chainback_viterbi27_sse2(p,data,nbits,endstate);
100#endif
101 }
102}
103
104/* Delete instance of a Viterbi decoder */
105void delete_viterbi27(void *p){
106 switch(Cpu_mode){
107 case PORT:
108 default:
109 delete_viterbi27_port(p);
110 break;
111#ifdef __VEC__
112 case ALTIVEC:
113 delete_viterbi27_av(p);
114 break;
115#endif
116#ifdef __i386__
117 case MMX:
118 delete_viterbi27_mmx(p);
119 break;
120 case SSE:
121 delete_viterbi27_sse(p);
122 break;
123 case SSE2:
124 delete_viterbi27_sse2(p);
125 break;
126#endif
127 }
128}
129
130/* Update decoder with a block of demodulated symbols
131 * Note that nbits is the number of decoded data bits, not the number
132 * of symbols!
133 */
134int update_viterbi27_blk(void *p,unsigned char syms[],int nbits){
135 if(p == NULL)
136 return -1;
137
138 switch(Cpu_mode){
139 case PORT:
140 default:
141 update_viterbi27_blk_port(p,syms,nbits);
142 break;
143#ifdef __VEC__
144 case ALTIVEC:
145 update_viterbi27_blk_av(p,syms,nbits);
146 break;
147#endif
148#ifdef __i386__
149 case MMX:
150 update_viterbi27_blk_mmx(p,syms,nbits);
151 break;
152 case SSE:
153 update_viterbi27_blk_sse(p,syms,nbits);
154 break;
155 case SSE2:
156 update_viterbi27_blk_sse2(p,syms,nbits);
157 break;
158#endif
159 }
160 return 0;
161}