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154 lines
3.3 KiB
154 lines
3.3 KiB
/* Switch to K=9 r=1/3 Viterbi decoder with optional Intel or PowerPC SIMD
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* Copyright Aug 2006, Phil Karn, KA9Q
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <memory.h>
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#include "fec.h"
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/* Create a new instance of a Viterbi decoder */
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void *create_viterbi39(int len){
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find_cpu_mode();
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switch(Cpu_mode){
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case PORT:
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default:
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return create_viterbi39_port(len);
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#ifdef __VEC__
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case ALTIVEC:
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return create_viterbi39_av(len);
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#endif
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#ifdef __i386__
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case MMX:
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return create_viterbi39_mmx(len);
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case SSE:
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return create_viterbi39_sse(len);
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case SSE2:
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return create_viterbi39_sse2(len);
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#endif
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}
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}
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void set_viterbi39_polynomial(int polys[3]){
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switch(Cpu_mode){
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case PORT:
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default:
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set_viterbi39_polynomial_port(polys);
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break;
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#ifdef __VEC__
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case ALTIVEC:
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set_viterbi39_polynomial_av(polys);
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break;
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#endif
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#ifdef __i386__
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case MMX:
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set_viterbi39_polynomial_mmx(polys);
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break;
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case SSE:
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set_viterbi39_polynomial_sse(polys);
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break;
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case SSE2:
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set_viterbi39_polynomial_sse2(polys);
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break;
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#endif
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}
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}
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/* Initialize Viterbi decoder for start of new frame */
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int init_viterbi39(void *p,int starting_state){
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switch(Cpu_mode){
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case PORT:
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default:
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return init_viterbi39_port(p,starting_state);
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#ifdef __VEC__
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case ALTIVEC:
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return init_viterbi39_av(p,starting_state);
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#endif
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#ifdef __i386__
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case MMX:
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return init_viterbi39_mmx(p,starting_state);
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case SSE:
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return init_viterbi39_sse(p,starting_state);
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case SSE2:
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return init_viterbi39_sse2(p,starting_state);
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#endif
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}
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}
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/* Viterbi chainback */
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int chainback_viterbi39(
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void *p,
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unsigned char *data, /* Decoded output data */
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unsigned int nbits, /* Number of data bits */
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unsigned int endstate){ /* Terminal encoder state */
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switch(Cpu_mode){
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case PORT:
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default:
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return chainback_viterbi39_port(p,data,nbits,endstate);
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#ifdef __VEC__
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case ALTIVEC:
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return chainback_viterbi39_av(p,data,nbits,endstate);
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#endif
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#ifdef __i386__
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case MMX:
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return chainback_viterbi39_mmx(p,data,nbits,endstate);
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case SSE:
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return chainback_viterbi39_sse(p,data,nbits,endstate);
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case SSE2:
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return chainback_viterbi39_sse2(p,data,nbits,endstate);
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#endif
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}
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}
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/* Delete instance of a Viterbi decoder */
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void delete_viterbi39(void *p){
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switch(Cpu_mode){
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case PORT:
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default:
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delete_viterbi39_port(p);
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break;
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#ifdef __VEC__
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case ALTIVEC:
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delete_viterbi39_av(p);
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break;
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#endif
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#ifdef __i386__
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case MMX:
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delete_viterbi39_mmx(p);
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break;
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case SSE:
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delete_viterbi39_sse(p);
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break;
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case SSE2:
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delete_viterbi39_sse2(p);
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break;
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#endif
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}
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}
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/* Update decoder with a block of demodulated symbols
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* Note that nbits is the number of decoded data bits, not the number
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* of symbols!
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*/
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int update_viterbi39_blk(void *p,unsigned char syms[],int nbits){
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switch(Cpu_mode){
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case PORT:
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default:
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return update_viterbi39_blk_port(p,syms,nbits);
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#ifdef __VEC__
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case ALTIVEC:
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return update_viterbi39_blk_av(p,syms,nbits);
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#endif
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#ifdef __i386__
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case MMX:
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return update_viterbi39_blk_mmx(p,syms,nbits);
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case SSE:
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return update_viterbi39_blk_sse(p,syms,nbits);
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case SSE2:
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return update_viterbi39_blk_sse2(p,syms,nbits);
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#endif
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}
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}
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