diff options
Diffstat (limited to 'converter/other/fiasco/input/read.c')
| -rw-r--r-- | converter/other/fiasco/input/read.c | 91 |
1 files changed, 47 insertions, 44 deletions
diff --git a/converter/other/fiasco/input/read.c b/converter/other/fiasco/input/read.c index 9f4ac993..c3aa77a8 100644 --- a/converter/other/fiasco/input/read.c +++ b/converter/other/fiasco/input/read.c @@ -2,7 +2,7 @@ * read.c: Input of WFA files * * Written by: Ullrich Hafner - * + * * This file is part of FIASCO (Fractal Image And Sequence COdec) * Copyright (C) 1994-2000 Ullrich Hafner */ @@ -47,7 +47,7 @@ /***************************************************************************** prototypes - + *****************************************************************************/ static void @@ -57,7 +57,7 @@ read_tiling (tiling_t *tiling, unsigned image_width, unsigned image_height, /***************************************************************************** public code - + *****************************************************************************/ bitfile_t * @@ -69,14 +69,14 @@ open_wfa (const char *filename, wfa_info_t *wi) * Pointer to input stream (fileposition: first WFA frame) * * Side effects: - * The values of the header of 'filename' are copied to 'wfainfo'. + * The values of the header of 'filename' are copied to 'wfainfo'. * */ { bitfile_t *input; /* pointer to WFA bitfile */ - + assert (filename && wi); - + wi->wfa_name = strdup (filename); /* @@ -85,16 +85,16 @@ open_wfa (const char *filename, wfa_info_t *wi) { unsigned n; const char *str; - + if (!(input = open_bitfile (filename, "FIASCO_DATA", READ_ACCESS))) file_error (filename); - + for (str = FIASCO_MAGIC, n = strlen (FIASCO_MAGIC); n; n--) if (get_bits (input, 8) != (unsigned) *str++) error ("Input file %s is not a valid FIASCO file!", filename); get_bits (input, 8); /* fetch newline */ } - + /* * Read WFA header information */ @@ -102,13 +102,13 @@ open_wfa (const char *filename, wfa_info_t *wi) char basis_name [MAXSTRLEN]; /* temp. buffer */ const unsigned rice_k = 8; /* parameter of Rice Code */ char *str = basis_name; - + while ((*str++ = get_bits (input, 8)) != 0 && str < basis_name + MAXSTRLEN) ; if (str == basis_name + MAXSTRLEN) error ("Input file %s is not a valid FIASCO file!", filename); - + { wi->release = read_rice_code (rice_k, input); @@ -121,12 +121,12 @@ open_wfa (const char *filename, wfa_info_t *wi) if (wi->release > 1) { header_type_e type; - + while ((type = read_rice_code (rice_k, input)) != HEADER_END) { char buffer [MAXSTRLEN]; unsigned n = 0; - + switch (type) { case HEADER_TITLE: @@ -157,7 +157,7 @@ open_wfa (const char *filename, wfa_info_t *wi) { unsigned lx = log2 (wi->width - 1) + 1; unsigned ly = log2 (wi->height - 1) + 1; - + wi->level = MAX(lx, ly) * 2 - ((ly == lx + 1) ? 1 : 0); } wi->chroma_max_states = wi->color ? read_rice_code (rice_k, input) : -1; @@ -176,14 +176,14 @@ open_wfa (const char *filename, wfa_info_t *wi) mantissa = get_bits (input, 3) + 2; range = get_bits (input, 2); wi->rpf = alloc_rpf (mantissa, range); - + if (get_bit (input)) /* different DC model */ { mantissa = get_bits (input, 3) + 2; range = get_bits (input, 2); wi->dc_rpf = alloc_rpf (mantissa, range); } - else /* use same model for DC coefficents */ + else /* use same model for DC coefficients */ wi->dc_rpf = alloc_rpf (wi->rpf->mantissa_bits, wi->rpf->range_e); @@ -196,7 +196,7 @@ open_wfa (const char *filename, wfa_info_t *wi) else wi->d_rpf = alloc_rpf (wi->rpf->mantissa_bits, wi->rpf->range_e); - + if (get_bit (input)) /* different DC delta model */ { mantissa = get_bits (input, 3) + 2; @@ -216,7 +216,7 @@ open_wfa (const char *filename, wfa_info_t *wi) wi->B_as_past_ref = get_bit (input) ? YES : NO; } } - + INPUT_BYTE_ALIGN (input); return input; @@ -246,10 +246,10 @@ read_basis (const char *filename, wfa_t *wfa) Free (wfa->wfainfo->basis_name); wfa->wfainfo->basis_name = strdup (filename); } - + if (get_linked_basis (filename, wfa)) - return; /* basis is linked with excecutable */ - + return; /* basis is linked with executable */ + /* * Check whether 'wfa_name' is a regular ASCII WFA initial basis file */ @@ -258,19 +258,19 @@ read_basis (const char *filename, wfa_t *wfa) if (!(input = open_file (filename, "FIASCO_DATA", READ_ACCESS))) file_error(filename); - + if (fscanf (input, MAXSTRLEN_SCANF, magic) != 1) error ("Format error: ASCII FIASCO initial basis file %s", filename); - else if (strneq (FIASCO_BASIS_MAGIC, magic)) + else if (!streq (FIASCO_BASIS_MAGIC, magic)) error ("Input file %s is not an ASCII FIASCO initial basis!", filename); } - + /* * WFA ASCII format: * * Note: State 0 is assumed to be the constant function f(x, y) = 128. - * Don't define any transitions of state 0 in an initial basis. + * Don't define any transitions of state 0 in an initial basis. * * Header: * type |description @@ -307,14 +307,14 @@ read_basis (const char *filename, wfa_t *wfa) /* * State 0 is assumed to be the constant function f(x, y) = 128. */ - wfa->domain_type [0] = USE_DOMAIN_MASK; + wfa->domain_type [0] = USE_DOMAIN_MASK; wfa->final_distribution [0] = 128; wfa->states = wfa->basis_states; wfa->basis_states++; append_edge (0, 0, 1.0, 0, wfa); append_edge (0, 0, 1.0, 1, wfa); - + for (state = 1; state < wfa->basis_states; state++) wfa->domain_type [state] = read_int (input) ? USE_DOMAIN_MASK : AUXILIARY_MASK; @@ -343,7 +343,7 @@ read_basis (const char *filename, wfa_t *wfa) } } } - + fclose (input); } @@ -353,7 +353,7 @@ read_next_wfa (wfa_t *wfa, bitfile_t *input) * Read next WFA frame of the WFA stream 'input'. * WFA header information has to be already present in the 'wfainfo' struct. * (i.e. open_wfa must be called first!) - * + * * No return value. * * Side effects: @@ -364,9 +364,9 @@ read_next_wfa (wfa_t *wfa, bitfile_t *input) { tiling_t tiling; /* tiling information */ unsigned frame_number; /* current frame number */ - + assert (wfa && input); - + /* * Frame header information */ @@ -382,16 +382,16 @@ read_next_wfa (wfa_t *wfa, bitfile_t *input) { INPUT_BYTE_ALIGN (input); } - + /* - * Read image tiling info + * Read image tiling info */ if (get_bit (input)) /* tiling performed ? */ read_tiling (&tiling, wfa->wfainfo->width, wfa->wfainfo->height, wfa->wfainfo->level, input); else tiling.exponent = 0; - + INPUT_BYTE_ALIGN (input); read_tree (wfa, &tiling, input); @@ -402,7 +402,7 @@ read_next_wfa (wfa_t *wfa, bitfile_t *input) */ { unsigned state; - + for (state = wfa->basis_states; state < wfa->states; state++) if ((!wfa->wfainfo->color || (int) state <= wfa->tree [wfa->tree [wfa->root_state][0]][0]) @@ -420,7 +420,7 @@ read_next_wfa (wfa_t *wfa, bitfile_t *input) else wfa->domain_type [state] = 0; } - + if (tiling.exponent) Free (tiling.vorder); @@ -431,12 +431,12 @@ read_next_wfa (wfa_t *wfa, bitfile_t *input) read_mc (wfa->frame_type, wfa, input); locate_delta_images (wfa); - + /* * Read linear combinations (coefficients and indices) */ { - unsigned edges = read_matrices (wfa, input); + unsigned edges = read_matrices (wfa, input); if (edges) read_weights (edges, wfa, input); @@ -447,7 +447,7 @@ read_next_wfa (wfa_t *wfa, bitfile_t *input) */ { unsigned state; - + for (state = wfa->basis_states; state <= wfa->states; state++) wfa->final_distribution[state] = compute_final_distribution (state, wfa); @@ -459,7 +459,7 @@ read_next_wfa (wfa_t *wfa, bitfile_t *input) /***************************************************************************** private code - + *****************************************************************************/ static void @@ -468,14 +468,14 @@ read_tiling (tiling_t *tiling, unsigned image_width, unsigned image_height, /* * Read image tiling information from the given file 'input' * and store parameters in struct 'tiling'. - * + * * No return value. */ { const unsigned rice_k = 8; /* parameter of Rice Code */ - + tiling->exponent = read_rice_code (rice_k, input); - + if (get_bit (input)) /* variance order */ { unsigned tile; /* current image tile */ @@ -487,7 +487,7 @@ read_tiling (tiling_t *tiling, unsigned image_width, unsigned image_height, { locate_subimage (image_level, image_level - tiling->exponent, tile, &x0, &y0, &width, &height); - if (x0 < image_width && y0 < image_height) + if (x0 < image_width && y0 < image_height) tiling->vorder [tile] = get_bits (input, tiling->exponent); else tiling->vorder [tile] = -1; @@ -500,3 +500,6 @@ read_tiling (tiling_t *tiling, unsigned image_width, unsigned image_height, tiling->exponent, get_bit (input) ? YES : NO); } } + + + |