diff options
Diffstat (limited to 'converter/other/fiasco/output/weights.c')
| -rw-r--r-- | converter/other/fiasco/output/weights.c | 76 |
1 files changed, 38 insertions, 38 deletions
diff --git a/converter/other/fiasco/output/weights.c b/converter/other/fiasco/output/weights.c index 0203fef0..4eb068ac 100644 --- a/converter/other/fiasco/output/weights.c +++ b/converter/other/fiasco/output/weights.c @@ -1,8 +1,8 @@ /* - * weights.c: Output of weights + * weights.c: Output of weights + * + * Written by: Ullrich Hafner * - * Written by: Ullrich Hafner - * * This file is part of FIASCO (Fractal Image And Sequence COdec) * Copyright (C) 1994-2000 Ullrich Hafner */ @@ -32,8 +32,8 @@ /***************************************************************************** - public code - + public code + *****************************************************************************/ void @@ -45,20 +45,20 @@ write_weights (unsigned total, const wfa_t *wfa, bitfile_t *output) * No return value. */ { - unsigned state, label; /* current label */ - unsigned offset1, offset2; /* model offsets. */ - unsigned offset3, offset4; /* model offsets. */ - unsigned *weights_array; /* array of weights to encode */ - unsigned *wptr; /* pointer to current weight */ - unsigned *level_array; /* array of corresponding levels */ - unsigned *lptr; /* pointer to current corr. level */ - int min_level, max_level; /* min and max range level */ - int d_min_level, d_max_level; /* min and max delta range level */ - bool_t dc, d_dc; /* true if dc or delta dc are used */ - bool_t delta_approx = NO; /* true if delta has been used */ - unsigned delta_count = 0; /* number of delta ranges */ - unsigned bits = bits_processed (output); - + unsigned state, label; /* current label */ + unsigned offset1, offset2; /* model offsets. */ + unsigned offset3, offset4; /* model offsets. */ + unsigned *weights_array; /* array of weights to encode */ + unsigned *wptr; /* pointer to current weight */ + unsigned *level_array; /* array of corresponding levels */ + unsigned *lptr; /* pointer to current corr. level */ + int min_level, max_level; /* min and max range level */ + int d_min_level, d_max_level; /* min and max delta range level */ + bool_t dc, d_dc; /* true if dc or delta dc are used */ + bool_t delta_approx = NO; /* true if delta has been used */ + unsigned delta_count = 0; /* number of delta ranges */ + unsigned bits = bits_processed (output); + /* * Check whether delta approximation has been used */ @@ -68,14 +68,14 @@ write_weights (unsigned total, const wfa_t *wfa, bitfile_t *output) delta_approx = YES; break; } - + /* * Generate array of corresponding levels (context of probability model) */ min_level = d_min_level = MAXLEVEL; max_level = d_max_level = 0; - dc = d_dc = NO; - + dc = d_dc = NO; + for (state = wfa->basis_states; state < wfa->states; state++) for (label = 0; label < MAXLABELS; label++) if (isrange (wfa->tree [state][label])) @@ -95,24 +95,24 @@ write_weights (unsigned total, const wfa_t *wfa, bitfile_t *output) dc = YES; } } - if (min_level > max_level) /* no lc found */ + if (min_level > max_level) /* no lc found */ max_level = min_level - 1; if (d_min_level > d_max_level) d_max_level = d_min_level - 1; /* * Context model: - * 0 DC weight - * 1 Delta DC weight - * 2-k normal weights per level - * k+1 - m Delta weights per level + * 0 DC weight + * 1 Delta DC weight + * 2-k normal weights per level + * k+1 - m Delta weights per level */ offset1 = dc ? 1 : 0; offset2 = offset1 + (d_dc ? 1 : 0); offset3 = offset2 + (max_level - min_level + 1); offset4 = offset3 + (d_max_level - d_min_level + 1); - + /* * Weights are encoded as follows: * all weights of state n @@ -127,15 +127,15 @@ write_weights (unsigned total, const wfa_t *wfa, bitfile_t *output) for (label = 0; label < MAXLABELS; label++) if (isrange (wfa->tree [state][label])) { - int edge; /* current edge */ - int domain; /* current domain (context of model) */ - + int edge; /* current edge */ + int domain; /* current domain (context of model) */ + for (edge = 0; isedge (domain = wfa->into [state][label][edge]); edge++) { if (wptr - weights_array >= (int) total) error ("Can't write more than %d weights.", total); - if (domain) /* not DC component */ + if (domain) /* not DC component */ { if (delta_approx && wfa->delta_state [state]) /* delta */ { @@ -153,7 +153,7 @@ write_weights (unsigned total, const wfa_t *wfa, bitfile_t *output) + wfa->level_of_state [state] - 1 - min_level; } } - else /* DC component */ + else /* DC component */ { if (delta_approx && wfa->delta_state [state]) /* delta */ { @@ -172,9 +172,9 @@ write_weights (unsigned total, const wfa_t *wfa, bitfile_t *output) } { - unsigned i; - unsigned *c_symbols = Calloc (offset4, sizeof (int)); - const int scale = 500; /* scaling of probability model */ + unsigned i; + unsigned *c_symbols = Calloc (offset4, sizeof (int)); + const int scale = 500; /* scaling of probability model */ c_symbols [0] = 1 << (wfa->wfainfo->dc_rpf->mantissa_bits + 1); if (offset1 != offset2) @@ -184,12 +184,12 @@ write_weights (unsigned total, const wfa_t *wfa, bitfile_t *output) c_symbols [i] = 1 << (wfa->wfainfo->rpf->mantissa_bits + 1); for (; i < offset4; i++) c_symbols [i] = 1 << (wfa->wfainfo->d_rpf->mantissa_bits + 1); - + encode_array (output, weights_array, level_array, c_symbols, offset4, total, scale); Free (c_symbols); } - + debug_message ("%d delta weights out of %d.", delta_count, total); debug_message ("weights: %5d bits. (%5d symbols => %5.2f bps)", bits_processed (output) - bits, total, |