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348 lines
13 KiB
C
348 lines
13 KiB
C
/* User include file for libfec
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* Copyright 2004, Phil Karn, KA9Q
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* May be used under the terms of the GNU Lesser General Public License (LGPL)
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*/
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#ifndef _FEC_H_
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#define _FEC_H_
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/* r=1/2 k=7 convolutional encoder polynomials
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* The NASA-DSN convention is to use V27POLYA inverted, then V27POLYB
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* The CCSDS/NASA-GSFC convention is to use V27POLYB, then V27POLYA inverted
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*/
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#define V27POLYA 0x6d
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#define V27POLYB 0x4f
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void *create_viterbi27(int len);
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void set_viterbi27_polynomial(int polys[2]);
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int init_viterbi27(void *vp,int starting_state);
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int update_viterbi27_blk(void *vp,unsigned char sym[],int npairs);
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int chainback_viterbi27(void *vp, unsigned char *data,unsigned int nbits,unsigned int endstate);
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void delete_viterbi27(void *vp);
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#ifdef __VEC__
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void *create_viterbi27_av(int len);
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void set_viterbi27_polynomial_av(int polys[2]);
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int init_viterbi27_av(void *p,int starting_state);
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int chainback_viterbi27_av(void *p,unsigned char *data,unsigned int nbits,unsigned int endstate);
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void delete_viterbi27_av(void *p);
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int update_viterbi27_blk_av(void *p,unsigned char *syms,int nbits);
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#endif
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#ifdef __i386__
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void *create_viterbi27_mmx(int len);
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void set_viterbi27_polynomial_mmx(int polys[2]);
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int init_viterbi27_mmx(void *p,int starting_state);
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int chainback_viterbi27_mmx(void *p,unsigned char *data,unsigned int nbits,unsigned int endstate);
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void delete_viterbi27_mmx(void *p);
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int update_viterbi27_blk_mmx(void *p,unsigned char *syms,int nbits);
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void *create_viterbi27_sse(int len);
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void set_viterbi27_polynomial_sse(int polys[2]);
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int init_viterbi27_sse(void *p,int starting_state);
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int chainback_viterbi27_sse(void *p,unsigned char *data,unsigned int nbits,unsigned int endstate);
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void delete_viterbi27_sse(void *p);
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int update_viterbi27_blk_sse(void *p,unsigned char *syms,int nbits);
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void *create_viterbi27_sse2(int len);
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void set_viterbi27_polynomial_sse2(int polys[2]);
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int init_viterbi27_sse2(void *p,int starting_state);
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int chainback_viterbi27_sse2(void *p,unsigned char *data,unsigned int nbits,unsigned int endstate);
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void delete_viterbi27_sse2(void *p);
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int update_viterbi27_blk_sse2(void *p,unsigned char *syms,int nbits);
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#endif
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void *create_viterbi27_port(int len);
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void set_viterbi27_polynomial_port(int polys[2]);
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int init_viterbi27_port(void *p,int starting_state);
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int chainback_viterbi27_port(void *p,unsigned char *data,unsigned int nbits,unsigned int endstate);
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void delete_viterbi27_port(void *p);
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int update_viterbi27_blk_port(void *p,unsigned char *syms,int nbits);
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/* r=1/2 k=9 convolutional encoder polynomials */
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#define V29POLYA 0x1af
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#define V29POLYB 0x11d
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void *create_viterbi29(int len);
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void set_viterbi29_polynomial(int polys[2]);
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int init_viterbi29(void *vp,int starting_state);
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int update_viterbi29_blk(void *vp,unsigned char syms[],int nbits);
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int chainback_viterbi29(void *vp, unsigned char *data,unsigned int nbits,unsigned int endstate);
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void delete_viterbi29(void *vp);
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#ifdef __VEC__
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void *create_viterbi29_av(int len);
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void set_viterbi29_polynomial_av(int polys[2]);
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int init_viterbi29_av(void *p,int starting_state);
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int chainback_viterbi29_av(void *p,unsigned char *data,unsigned int nbits,unsigned int endstate);
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void delete_viterbi29_av(void *p);
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int update_viterbi29_blk_av(void *p,unsigned char *syms,int nbits);
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#endif
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#ifdef __i386__
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void *create_viterbi29_mmx(int len);
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void set_viterbi29_polynomial_mmx(int polys[2]);
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int init_viterbi29_mmx(void *p,int starting_state);
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int chainback_viterbi29_mmx(void *p,unsigned char *data,unsigned int nbits,unsigned int endstate);
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void delete_viterbi29_mmx(void *p);
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int update_viterbi29_blk_mmx(void *p,unsigned char *syms,int nbits);
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void *create_viterbi29_sse(int len);
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void set_viterbi29_polynomial_sse(int polys[2]);
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int init_viterbi29_sse(void *p,int starting_state);
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int chainback_viterbi29_sse(void *p,unsigned char *data,unsigned int nbits,unsigned int endstate);
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void delete_viterbi29_sse(void *p);
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int update_viterbi29_blk_sse(void *p,unsigned char *syms,int nbits);
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void *create_viterbi29_sse2(int len);
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void set_viterbi29_polynomial_sse2(int polys[2]);
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int init_viterbi29_sse2(void *p,int starting_state);
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int chainback_viterbi29_sse2(void *p,unsigned char *data,unsigned int nbits,unsigned int endstate);
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void delete_viterbi29_sse2(void *p);
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int update_viterbi29_blk_sse2(void *p,unsigned char *syms,int nbits);
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#endif
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void *create_viterbi29_port(int len);
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void set_viterbi29_polynomial_port(int polys[2]);
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int init_viterbi29_port(void *p,int starting_state);
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int chainback_viterbi29_port(void *p,unsigned char *data,unsigned int nbits,unsigned int endstate);
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void delete_viterbi29_port(void *p);
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int update_viterbi29_blk_port(void *p,unsigned char *syms,int nbits);
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/* r=1/3 k=9 convolutional encoder polynomials */
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#define V39POLYA 0x1ed
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#define V39POLYB 0x19b
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#define V39POLYC 0x127
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void *create_viterbi39(int len);
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void set_viterbi39_polynomial(int polys[3]);
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int init_viterbi39(void *vp,int starting_state);
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int update_viterbi39_blk(void *vp,unsigned char syms[],int nbits);
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int chainback_viterbi39(void *vp, unsigned char *data,unsigned int nbits,unsigned int endstate);
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void delete_viterbi39(void *vp);
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#ifdef __VEC__
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void *create_viterbi39_av(int len);
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void set_viterbi39_polynomial_av(int polys[3]);
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int init_viterbi39_av(void *p,int starting_state);
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int chainback_viterbi39_av(void *p,unsigned char *data,unsigned int nbits,unsigned int endstate);
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void delete_viterbi39_av(void *p);
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int update_viterbi39_blk_av(void *p,unsigned char *syms,int nbits);
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#endif
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#ifdef __i386__
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void *create_viterbi39_mmx(int len);
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void set_viterbi39_polynomial_mmx(int polys[3]);
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int init_viterbi39_mmx(void *p,int starting_state);
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int chainback_viterbi39_mmx(void *p,unsigned char *data,unsigned int nbits,unsigned int endstate);
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void delete_viterbi39_mmx(void *p);
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int update_viterbi39_blk_mmx(void *p,unsigned char *syms,int nbits);
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void *create_viterbi39_sse(int len);
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void set_viterbi39_polynomial_sse(int polys[3]);
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int init_viterbi39_sse(void *p,int starting_state);
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int chainback_viterbi39_sse(void *p,unsigned char *data,unsigned int nbits,unsigned int endstate);
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void delete_viterbi39_sse(void *p);
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int update_viterbi39_blk_sse(void *p,unsigned char *syms,int nbits);
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void *create_viterbi39_sse2(int len);
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void set_viterbi39_polynomial_sse2(int polys[3]);
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int init_viterbi39_sse2(void *p,int starting_state);
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int chainback_viterbi39_sse2(void *p,unsigned char *data,unsigned int nbits,unsigned int endstate);
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void delete_viterbi39_sse2(void *p);
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int update_viterbi39_blk_sse2(void *p,unsigned char *syms,int nbits);
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#endif
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void *create_viterbi39_port(int len);
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void set_viterbi39_polynomial_port(int polys[3]);
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int init_viterbi39_port(void *p,int starting_state);
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int chainback_viterbi39_port(void *p,unsigned char *data,unsigned int nbits,unsigned int endstate);
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void delete_viterbi39_port(void *p);
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int update_viterbi39_blk_port(void *p,unsigned char *syms,int nbits);
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/* r=1/6 k=15 Cassini convolutional encoder polynomials without symbol inversion
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* dfree = 56
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* These bits may be left-right flipped from some textbook representations;
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* here I have the bits entering the shift register from the right (low) end
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*
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* Some other spacecraft use the same code, but with the polynomials in a different order.
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* E.g., Mars Pathfinder and STEREO swap POLYC and POLYD. All use alternate symbol inversion,
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* so use set_viterbi615_polynomial() as appropriate.
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*/
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#define V615POLYA 042631
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#define V615POLYB 047245
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#define V615POLYC 056507
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#define V615POLYD 073363
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#define V615POLYE 077267
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#define V615POLYF 064537
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void *create_viterbi615(int len);
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void set_viterbi615_polynomial(int polys[6]);
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int init_viterbi615(void *vp,int starting_state);
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int update_viterbi615_blk(void *vp,unsigned char *syms,int nbits);
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int chainback_viterbi615(void *vp, unsigned char *data,unsigned int nbits,unsigned int endstate);
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void delete_viterbi615(void *vp);
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#ifdef __VEC__
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void *create_viterbi615_av(int len);
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void set_viterbi615_polynomial_av(int polys[6]);
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int init_viterbi615_av(void *p,int starting_state);
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int chainback_viterbi615_av(void *p,unsigned char *data,unsigned int nbits,unsigned int endstate);
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void delete_viterbi615_av(void *p);
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int update_viterbi615_blk_av(void *p,unsigned char *syms,int nbits);
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#endif
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#ifdef __i386__
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void *create_viterbi615_mmx(int len);
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void set_viterbi615_polynomial_mmx(int polys[6]);
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int init_viterbi615_mmx(void *p,int starting_state);
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int chainback_viterbi615_mmx(void *p,unsigned char *data,unsigned int nbits,unsigned int endstate);
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void delete_viterbi615_mmx(void *p);
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int update_viterbi615_blk_mmx(void *p,unsigned char *syms,int nbits);
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void *create_viterbi615_sse(int len);
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void set_viterbi615_polynomial_sse(int polys[6]);
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int init_viterbi615_sse(void *p,int starting_state);
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int chainback_viterbi615_sse(void *p,unsigned char *data,unsigned int nbits,unsigned int endstate);
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void delete_viterbi615_sse(void *p);
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int update_viterbi615_blk_sse(void *p,unsigned char *syms,int nbits);
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void *create_viterbi615_sse2(int len);
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void set_viterbi615_polynomial_sse2(int polys[6]);
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int init_viterbi615_sse2(void *p,int starting_state);
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int chainback_viterbi615_sse2(void *p,unsigned char *data,unsigned int nbits,unsigned int endstate);
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void delete_viterbi615_sse2(void *p);
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int update_viterbi615_blk_sse2(void *p,unsigned char *syms,int nbits);
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#endif
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void *create_viterbi615_port(int len);
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void set_viterbi615_polynomial_port(int polys[6]);
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int init_viterbi615_port(void *p,int starting_state);
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int chainback_viterbi615_port(void *p,unsigned char *data,unsigned int nbits,unsigned int endstate);
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void delete_viterbi615_port(void *p);
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int update_viterbi615_blk_port(void *p,unsigned char *syms,int nbits);
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/* General purpose RS codec, 8-bit symbols */
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void encode_rs_char(void *rs,unsigned char *data,unsigned char *parity);
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int decode_rs_char(void *rs,unsigned char *data,int *eras_pos,
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int no_eras);
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void *init_rs_char(int symsize,int gfpoly,
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int fcr,int prim,int nroots,
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int pad);
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void free_rs_char(void *rs);
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/* General purpose RS codec, integer symbols */
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void encode_rs_int(void *rs,int *data,int *parity);
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int decode_rs_int(void *rs,int *data,int *eras_pos,int no_eras);
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void *init_rs_int(int symsize,int gfpoly,int fcr,
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int prim,int nroots,int pad);
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void free_rs_int(void *rs);
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/* CCSDS standard (255,223) RS codec with conventional (*not* dual-basis)
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* symbol representation
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*/
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void encode_rs_8(unsigned char *data,unsigned char *parity,int pad);
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int decode_rs_8(unsigned char *data,int *eras_pos,int no_eras,int pad);
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/* CCSDS standard (255,223) RS codec with dual-basis symbol representation */
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void encode_rs_ccsds(unsigned char *data,unsigned char *parity,int pad);
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int decode_rs_ccsds(unsigned char *data,int *eras_pos,int no_eras,int pad);
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/* Tables to map from conventional->dual (Taltab) and
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* dual->conventional (Tal1tab) bases
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*/
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extern unsigned char Taltab[],Tal1tab[];
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/* CPU SIMD instruction set available */
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extern enum cpu_mode {UNKNOWN=0,PORT,MMX,SSE,SSE2,ALTIVEC} Cpu_mode;
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void find_cpu_mode(void); /* Call this once at startup to set Cpu_mode */
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/* Determine parity of argument: 1 = odd, 0 = even */
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#ifdef __i386__
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static inline int parityb(unsigned char x){
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__asm__ __volatile__ ("test %1,%1;setpo %0" : "=g"(x) : "r" (x));
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return x;
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}
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#else
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void partab_init();
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static inline int parityb(unsigned char x){
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extern unsigned char Partab[256];
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extern int P_init;
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if(!P_init){
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partab_init();
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}
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return Partab[x];
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}
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#endif
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static inline int parity(int x){
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/* Fold down to one byte */
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x ^= (x >> 16);
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x ^= (x >> 8);
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return parityb(x);
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}
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/* Useful utilities for simulation */
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double normal_rand(double mean, double std_dev);
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unsigned char addnoise(int sym,double amp,double gain,double offset,int clip);
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extern int Bitcnt[];
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/* Dot product functions */
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void *initdp(signed short coeffs[],int len);
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void freedp(void *dp);
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long dotprod(void *dp,signed short a[]);
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void *initdp_port(signed short coeffs[],int len);
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void freedp_port(void *dp);
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long dotprod_port(void *dp,signed short a[]);
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#ifdef __i386__
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void *initdp_mmx(signed short coeffs[],int len);
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void freedp_mmx(void *dp);
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long dotprod_mmx(void *dp,signed short a[]);
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void *initdp_sse(signed short coeffs[],int len);
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void freedp_sse(void *dp);
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long dotprod_sse(void *dp,signed short a[]);
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void *initdp_sse2(signed short coeffs[],int len);
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void freedp_sse2(void *dp);
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long dotprod_sse2(void *dp,signed short a[]);
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#endif
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#ifdef __VEC__
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void *initdp_av(signed short coeffs[],int len);
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void freedp_av(void *dp);
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long dotprod_av(void *dp,signed short a[]);
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#endif
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/* Sum of squares - accepts signed shorts, produces unsigned long long */
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unsigned long long sumsq(signed short *in,int cnt);
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unsigned long long sumsq_port(signed short *in,int cnt);
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#ifdef __i386__
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unsigned long long sumsq_mmx(signed short *in,int cnt);
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unsigned long long sumsq_sse(signed short *in,int cnt);
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unsigned long long sumsq_sse2(signed short *in,int cnt);
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#endif
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#ifdef __VEC__
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unsigned long long sumsq_av(signed short *in,int cnt);
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#endif
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/* Low-level data structures and routines */
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int cpu_features(void);
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#endif /* _FEC_H_ */
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