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viterbi29.c
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/* Switch to K=9 r=1/2 Viterbi decoder with optional Intel or PowerPC SIMD
* Copyright Feb 2004, Phil Karn, KA9Q
*/
#include <stdio.h>
#include <stdlib.h>
#include <memory.h>
#include "fec.h"
/* Create a new instance of a Viterbi decoder */
void *create_viterbi29(int len){
find_cpu_mode();
switch(Cpu_mode){
case PORT:
default:
return create_viterbi29_port(len);
#ifdef __VEC__
case ALTIVEC:
return create_viterbi29_av(len);
#endif
#ifdef __i386__
case MMX:
return create_viterbi29_mmx(len);
case SSE:
return create_viterbi29_sse(len);
case SSE2:
return create_viterbi29_sse2(len);
#endif
}
}
void set_viterbi29_polynomial(int polys[2]){
switch(Cpu_mode){
case PORT:
default:
set_viterbi29_polynomial_port(polys);
break;
#ifdef __VEC__
case ALTIVEC:
set_viterbi29_polynomial_av(polys);
break;
#endif
#ifdef __i386__
case MMX:
set_viterbi29_polynomial_mmx(polys);
break;
case SSE:
set_viterbi29_polynomial_sse(polys);
break;
case SSE2:
set_viterbi29_polynomial_sse2(polys);
break;
#endif
}
}
/* Initialize Viterbi decoder for start of new frame */
int init_viterbi29(void *p,int starting_state){
switch(Cpu_mode){
case PORT:
default:
return init_viterbi29_port(p,starting_state);
#ifdef __VEC__
case ALTIVEC:
return init_viterbi29_av(p,starting_state);
#endif
#ifdef __i386__
case MMX:
return init_viterbi29_mmx(p,starting_state);
case SSE:
return init_viterbi29_sse(p,starting_state);
case SSE2:
return init_viterbi29_sse2(p,starting_state);
#endif
}
}
/* Viterbi chainback */
int chainback_viterbi29(
void *p,
unsigned char *data, /* Decoded output data */
unsigned int nbits, /* Number of data bits */
unsigned int endstate){ /* Terminal encoder state */
switch(Cpu_mode){
case PORT:
default:
return chainback_viterbi29_port(p,data,nbits,endstate);
#ifdef __VEC__
case ALTIVEC:
return chainback_viterbi29_av(p,data,nbits,endstate);
#endif
#ifdef __i386__
case MMX:
return chainback_viterbi29_mmx(p,data,nbits,endstate);
case SSE:
return chainback_viterbi29_sse(p,data,nbits,endstate);
case SSE2:
return chainback_viterbi29_sse2(p,data,nbits,endstate);
#endif
}
}
/* Delete instance of a Viterbi decoder */
void delete_viterbi29(void *p){
switch(Cpu_mode){
case PORT:
default:
delete_viterbi29_port(p);
break;
#ifdef __VEC__
case ALTIVEC:
delete_viterbi29_av(p);
break;
#endif
#ifdef __i386__
case MMX:
delete_viterbi29_mmx(p);
break;
case SSE:
delete_viterbi29_sse(p);
break;
case SSE2:
delete_viterbi29_sse2(p);
break;
#endif
}
}
/* Update decoder with a block of demodulated symbols
* Note that nbits is the number of decoded data bits, not the number
* of symbols!
*/
int update_viterbi29_blk(void *p,unsigned char syms[],int nbits){
switch(Cpu_mode){
case PORT:
default:
return update_viterbi29_blk_port(p,syms,nbits);
#ifdef __VEC__
case ALTIVEC:
return update_viterbi29_blk_av(p,syms,nbits);
#endif
#ifdef __i386__
case MMX:
return update_viterbi29_blk_mmx(p,syms,nbits);
case SSE:
return update_viterbi29_blk_sse(p,syms,nbits);
case SSE2:
return update_viterbi29_blk_sse2(p,syms,nbits);
#endif
}
}