diff options
Diffstat (limited to 'converter/other/fiasco/input/matrices.c')
| -rw-r--r-- | converter/other/fiasco/input/matrices.c | 80 |
1 files changed, 41 insertions, 39 deletions
diff --git a/converter/other/fiasco/input/matrices.c b/converter/other/fiasco/input/matrices.c index 388855ea..d20a27eb 100644 --- a/converter/other/fiasco/input/matrices.c +++ b/converter/other/fiasco/input/matrices.c @@ -2,7 +2,7 @@ * matrices.c: Input of transition matrices * * Written by: Ullrich Hafner - * + * * This file is part of FIASCO (Fractal Image And Sequence COdec) * Copyright (C) 1994-2000 Ullrich Hafner */ @@ -34,7 +34,7 @@ /***************************************************************************** prototypes - + *****************************************************************************/ static unsigned @@ -49,19 +49,19 @@ compute_y_state (int state, int y_state, wfa_t *wfa); /***************************************************************************** public code - + *****************************************************************************/ unsigned read_matrices (wfa_t *wfa, bitfile_t *input) -/* +/* * Read transitions of WFA given from the stream 'input'. * * Return value: * number of edges * * Side effects: - * 'wfa->into' is filled with decoded values + * 'wfa->into' is filled with decoded values */ { unsigned total; /* total number of edges in the WFA */ @@ -73,14 +73,14 @@ read_matrices (wfa_t *wfa, bitfile_t *input) total += delta_decoding (wfa, root_state, input); if (wfa->wfainfo->color) total += chroma_decoding (wfa, input); - + return total; } /***************************************************************************** private code - + *****************************************************************************/ static unsigned @@ -94,7 +94,7 @@ delta_decoding (wfa_t *wfa, unsigned last_domain, bitfile_t *input) * number of non-zero matrix elements (WFA edges) * * Side effects: - * 'wfa->into' is filled with decoded values + * 'wfa->into' is filled with decoded values */ { range_sort_t rs; /* ranges are sorted as in the coder */ @@ -128,26 +128,26 @@ delta_decoding (wfa_t *wfa, unsigned last_domain, bitfile_t *input) arith_t *decoder; model_t *elements; unsigned max_edges = read_rice_code (3, input); - + /* * Get the probability array of the number of edges distribution * and allocate the corresponding model. */ { unsigned edge; - + for (edge = 0; edge <= max_edges; edge++) count [edge] = read_rice_code ((int) log2 (last_domain) - 2, input); elements = alloc_model (max_edges + 1, 0, 0, count); } - + /* * Get number of elements per matrix row */ { unsigned row; - + n_edges = Calloc (wfa->states, sizeof (unsigned)); decoder = alloc_decoder (input); for (row = range = 0; range < rs.range_no; range++) @@ -155,17 +155,17 @@ delta_decoding (wfa_t *wfa, unsigned last_domain, bitfile_t *input) { state = rs.range_state [range]; label = rs.range_label [range]; - + n_edges [row++] = decode_symbol (decoder, elements) - (isedge (wfa->into [state][label][0]) ? 1 : 0); } - + free_decoder (decoder); free_model (elements); } } - + /* * Get matrix elements */ @@ -177,18 +177,18 @@ delta_decoding (wfa_t *wfa, unsigned last_domain, bitfile_t *input) u_word_t *mapping_coder2 = Calloc (wfa->states, sizeof (word_t)); bool_t use_normal_domains = get_bit (input); bool_t use_delta_domains = get_bit (input); - + /* * Generate array of states which are admitted domains. * When coding intra frames 'mapping1' == 'mapping2' otherwise - * 'mapping1' is a list of 'normal' domains which are admitted for + * 'mapping1' is a list of 'normal' domains which are admitted for * coding intra blocks * 'mapping2' is a list of 'delta' domains which are admitted for - * coding the motion compensated prediction error + * coding the motion compensated prediction error */ { unsigned n1, n2, state; - + for (n1 = n2 = state = 0; state < wfa->states; state++) { mapping1 [n1] = state; @@ -197,7 +197,7 @@ delta_decoding (wfa_t *wfa, unsigned last_domain, bitfile_t *input) && (state < wfa->basis_states || use_delta_domains || !wfa->delta_state [state])) n1++; - + mapping2 [n2] = state; mapping_coder2 [state] = n2; if (usedomain (state, wfa) @@ -206,7 +206,7 @@ delta_decoding (wfa_t *wfa, unsigned last_domain, bitfile_t *input) n2++; } } - + for (row = 0, range = 0; range < rs.range_no; range++) if (!rs.range_subdivided [range]) { @@ -249,7 +249,7 @@ delta_decoding (wfa_t *wfa, unsigned last_domain, bitfile_t *input) Free (mapping2); Free (mapping_coder2); } - + Free (n_edges); Free (rs.range_state); Free (rs.range_label); @@ -265,12 +265,12 @@ column_0_decoding (wfa_t *wfa, unsigned last_row, bitfile_t *input) * Read column 0 of the transition matrices of the 'wfa' which are coded * with quasi arithmetic coding from stream 'input'. * All rows from 'wfa->basis_states' up to 'last_row' are decoded. - * + * * Return value: * number of non-zero matrix elements (WFA edges) * * Side effects: - * 'wfa->into' is filled with decoded values + * 'wfa->into' is filled with decoded values */ { unsigned row; /* current matrix row */ @@ -294,9 +294,9 @@ column_0_decoding (wfa_t *wfa, unsigned last_row, bitfile_t *input) unsigned n; unsigned index; /* probability index */ unsigned exp; /* current exponent */ - + prob = Calloc (1 << (MAX_PROB + 1), sizeof (unsigned)); - + for (index = 0, n = MIN_PROB; n <= MAX_PROB; n++) for (exp = 0; exp < 1U << n; exp++, index++) prob [index] = n; @@ -304,12 +304,12 @@ column_0_decoding (wfa_t *wfa, unsigned last_row, bitfile_t *input) first = prob_ptr = new_prob_ptr = prob; last = first + 1020; - + is_leaf = wfa->tree [wfa->basis_states]; /* use pointer arithmetics ... */ high = HIGH; /* 1.0 */ low = LOW; /* 0.0 */ - code = get_bits (input, 16); + code = get_bits (input, 16); /* * Decode column 0 with a quasi arithmetic coder (QAC). @@ -325,7 +325,7 @@ column_0_decoding (wfa_t *wfa, unsigned last_row, bitfile_t *input) for (row = wfa->basis_states; row <= last_row; row++) { unsigned count; /* value in the current interval */ - + /* * Read label 0 element */ @@ -397,7 +397,7 @@ column_0_decoding (wfa_t *wfa, unsigned last_row, bitfile_t *input) INPUT_BYTE_ALIGN (input); Free (prob); - + return total; } @@ -411,7 +411,7 @@ chroma_decoding (wfa_t *wfa, bitfile_t *input) * number of non-zero matrix elements (WFA edges) * * Side effects: - * 'wfa->into' is filled with decoded values + * 'wfa->into' is filled with decoded values */ { unsigned domain; /* current domain, counter */ @@ -425,7 +425,7 @@ chroma_decoding (wfa_t *wfa, bitfile_t *input) u_word_t low; /* End of the current code range */ u_word_t code; /* The present input code value */ word_t *y_domains; /* domain images corresponding to Y */ - int save_index; /* YES: store current probabilty */ + int save_index; /* YES: store current probability */ /* * Compute the asymmetric probability array @@ -436,9 +436,9 @@ chroma_decoding (wfa_t *wfa, bitfile_t *input) unsigned n; unsigned index; /* probability index */ unsigned exp; /* current exponent */ - + prob = Calloc (1 << (MAX_PROB + 1), sizeof (unsigned)); - + for (index = 0, n = MIN_PROB; n <= MAX_PROB; n++) for (exp = 0; exp < 1U << n; exp++, index++) prob [index] = n; @@ -454,7 +454,7 @@ chroma_decoding (wfa_t *wfa, bitfile_t *input) y_domains = compute_hits (wfa->basis_states, wfa->tree [wfa->tree [wfa->root_state][0]][0], wfa->wfainfo->chroma_max_states, wfa); - + first = prob_ptr = new_prob_ptr = prob; last = first + 1020; @@ -554,7 +554,7 @@ chroma_decoding (wfa_t *wfa, bitfile_t *input) wfa->tree [wfa->tree [wfa->root_state][0]][0], wfa); compute_y_state (wfa->tree [wfa->tree [wfa->root_state][1]][0], wfa->tree [wfa->tree [wfa->root_state][0]][0], wfa); - + first = prob_ptr = new_prob_ptr = prob; /* @@ -566,7 +566,7 @@ chroma_decoding (wfa_t *wfa, bitfile_t *input) */ { unsigned row; - + for (row = wfa->tree [wfa->tree [wfa->root_state][0]][0] + 1; row < wfa->states; row++) { @@ -629,7 +629,7 @@ compute_y_state (int state, int y_state, wfa_t *wfa) */ { unsigned label; - + for (label = 0; label < MAXLABELS; label++) if (isrange (y_state)) wfa->y_state [state][label] = RANGE; @@ -640,5 +640,7 @@ compute_y_state (int state, int y_state, wfa_t *wfa) compute_y_state (wfa->tree [state][label], wfa->y_state [state][label], wfa); } - + } + + |