X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?a=blobdiff_plain;f=src%2Fjpeg%2Flibijg%2Fjdcoefct.c;h=0016bdda97b5e15c3956b978d0bbb0ed86f76224;hb=8ac4df8c7543a827c7b89fc9bbcf86625f3c1afe;hp=4938d20fcb655632d640534ba19e73f0c8fdccbc;hpb=a26e6f06a76ec85504cf65288e7c47f2cd728641;p=gdcm.git diff --git a/src/jpeg/libijg/jdcoefct.c b/src/jpeg/libijg/jdcoefct.c index 4938d20f..0016bdda 100644 --- a/src/jpeg/libijg/jdcoefct.c +++ b/src/jpeg/libijg/jdcoefct.c @@ -30,9 +30,9 @@ typedef struct { /* These variables keep track of the current location of the input side. */ /* cinfo->input_iMCU_row is also used for this. */ - JDIMENSION MCU_ctr; /* counts MCUs processed in current row */ - int MCU_vert_offset; /* counts MCU rows within iMCU row */ - int MCU_rows_per_iMCU_row; /* number of such rows needed */ + JDIMENSION MCU_ctr; /* counts MCUs processed in current row */ + int MCU_vert_offset; /* counts MCU rows within iMCU row */ + int MCU_rows_per_iMCU_row; /* number of such rows needed */ /* The output side's location is represented by cinfo->output_iMCU_row. */ @@ -55,7 +55,7 @@ typedef struct { #ifdef BLOCK_SMOOTHING_SUPPORTED /* When doing block smoothing, we latch coefficient Al values here */ int * coef_bits_latch; -#define SAVED_COEFS 6 /* we save coef_bits[0..5] */ +#define SAVED_COEFS 6 /* we save coef_bits[0..5] */ #endif } my_coef_controller; @@ -63,15 +63,15 @@ typedef my_coef_controller * my_coef_ptr; /* Forward declarations */ METHODDEF(int) decompress_onepass - JPP((j_decompress_ptr cinfo, JSAMPIMAGE output_buf)); + JPP((j_decompress_ptr cinfo, JSAMPIMAGE output_buf)); #ifdef D_MULTISCAN_FILES_SUPPORTED METHODDEF(int) decompress_data - JPP((j_decompress_ptr cinfo, JSAMPIMAGE output_buf)); + JPP((j_decompress_ptr cinfo, JSAMPIMAGE output_buf)); #endif #ifdef BLOCK_SMOOTHING_SUPPORTED LOCAL(boolean) smoothing_ok JPP((j_decompress_ptr cinfo)); METHODDEF(int) decompress_smooth_data - JPP((j_decompress_ptr cinfo, JSAMPIMAGE output_buf)); + JPP((j_decompress_ptr cinfo, JSAMPIMAGE output_buf)); #endif @@ -147,7 +147,7 @@ METHODDEF(int) decompress_onepass (j_decompress_ptr cinfo, JSAMPIMAGE output_buf) { my_coef_ptr coef = (my_coef_ptr) cinfo->coef; - JDIMENSION MCU_col_num; /* index of current MCU within row */ + JDIMENSION MCU_col_num; /* index of current MCU within row */ JDIMENSION last_MCU_col = cinfo->MCUs_per_row - 1; JDIMENSION last_iMCU_row = cinfo->total_iMCU_rows - 1; int blkn, ci, xindex, yindex, yoffset, useful_width; @@ -160,49 +160,49 @@ decompress_onepass (j_decompress_ptr cinfo, JSAMPIMAGE output_buf) for (yoffset = coef->MCU_vert_offset; yoffset < coef->MCU_rows_per_iMCU_row; yoffset++) { for (MCU_col_num = coef->MCU_ctr; MCU_col_num <= last_MCU_col; - MCU_col_num++) { + MCU_col_num++) { /* Try to fetch an MCU. Entropy decoder expects buffer to be zeroed. */ jzero_far((void FAR *) coef->MCU_buffer[0], - (size_t) (cinfo->blocks_in_MCU * SIZEOF(JBLOCK))); + (size_t) (cinfo->blocks_in_MCU * SIZEOF(JBLOCK))); if (! (*cinfo->entropy->decode_mcu) (cinfo, coef->MCU_buffer)) { - /* Suspension forced; update state counters and exit */ - coef->MCU_vert_offset = yoffset; - coef->MCU_ctr = MCU_col_num; - return JPEG_SUSPENDED; + /* Suspension forced; update state counters and exit */ + coef->MCU_vert_offset = yoffset; + coef->MCU_ctr = MCU_col_num; + return JPEG_SUSPENDED; } /* Determine where data should go in output_buf and do the IDCT thing. * We skip dummy blocks at the right and bottom edges (but blkn gets * incremented past them!). Note the inner loop relies on having * allocated the MCU_buffer[] blocks sequentially. */ - blkn = 0; /* index of current DCT block within MCU */ + blkn = 0; /* index of current DCT block within MCU */ for (ci = 0; ci < cinfo->comps_in_scan; ci++) { - compptr = cinfo->cur_comp_info[ci]; - /* Don't bother to IDCT an uninteresting component. */ - if (! compptr->component_needed) { - blkn += compptr->MCU_blocks; - continue; - } - inverse_DCT = cinfo->idct->inverse_DCT[compptr->component_index]; - useful_width = (MCU_col_num < last_MCU_col) ? compptr->MCU_width - : compptr->last_col_width; - output_ptr = output_buf[compptr->component_index] + - yoffset * compptr->DCT_scaled_size; - start_col = MCU_col_num * compptr->MCU_sample_width; - for (yindex = 0; yindex < compptr->MCU_height; yindex++) { - if (cinfo->input_iMCU_row < last_iMCU_row || - yoffset+yindex < compptr->last_row_height) { - output_col = start_col; - for (xindex = 0; xindex < useful_width; xindex++) { - (*inverse_DCT) (cinfo, compptr, - (JCOEFPTR) coef->MCU_buffer[blkn+xindex], - output_ptr, output_col); - output_col += compptr->DCT_scaled_size; - } - } - blkn += compptr->MCU_width; - output_ptr += compptr->DCT_scaled_size; - } + compptr = cinfo->cur_comp_info[ci]; + /* Don't bother to IDCT an uninteresting component. */ + if (! compptr->component_needed) { + blkn += compptr->MCU_blocks; + continue; + } + inverse_DCT = cinfo->idct->inverse_DCT[compptr->component_index]; + useful_width = (MCU_col_num < last_MCU_col) ? compptr->MCU_width + : compptr->last_col_width; + output_ptr = output_buf[compptr->component_index] + + yoffset * compptr->DCT_scaled_size; + start_col = MCU_col_num * compptr->MCU_sample_width; + for (yindex = 0; yindex < compptr->MCU_height; yindex++) { + if (cinfo->input_iMCU_row < last_iMCU_row || + yoffset+yindex < compptr->last_row_height) { + output_col = start_col; + for (xindex = 0; xindex < useful_width; xindex++) { + (*inverse_DCT) (cinfo, compptr, + (JCOEFPTR) coef->MCU_buffer[blkn+xindex], + output_ptr, output_col); + output_col += compptr->DCT_scaled_size; + } + } + blkn += compptr->MCU_width; + output_ptr += compptr->DCT_scaled_size; + } } } /* Completed an MCU row, but perhaps not an iMCU row */ @@ -227,7 +227,8 @@ decompress_onepass (j_decompress_ptr cinfo, JSAMPIMAGE output_buf) METHODDEF(int) dummy_consume_data (j_decompress_ptr cinfo) { - return JPEG_SUSPENDED; /* Always indicate nothing was done */ + cinfo = 0; + return JPEG_SUSPENDED; /* Always indicate nothing was done */ } @@ -244,7 +245,7 @@ METHODDEF(int) consume_data (j_decompress_ptr cinfo) { my_coef_ptr coef = (my_coef_ptr) cinfo->coef; - JDIMENSION MCU_col_num; /* index of current MCU within row */ + JDIMENSION MCU_col_num; /* index of current MCU within row */ int blkn, ci, xindex, yindex, yoffset; JDIMENSION start_col; JBLOCKARRAY buffer[MAX_COMPS_IN_SCAN]; @@ -268,25 +269,25 @@ consume_data (j_decompress_ptr cinfo) for (yoffset = coef->MCU_vert_offset; yoffset < coef->MCU_rows_per_iMCU_row; yoffset++) { for (MCU_col_num = coef->MCU_ctr; MCU_col_num < cinfo->MCUs_per_row; - MCU_col_num++) { + MCU_col_num++) { /* Construct list of pointers to DCT blocks belonging to this MCU */ - blkn = 0; /* index of current DCT block within MCU */ + blkn = 0; /* index of current DCT block within MCU */ for (ci = 0; ci < cinfo->comps_in_scan; ci++) { - compptr = cinfo->cur_comp_info[ci]; - start_col = MCU_col_num * compptr->MCU_width; - for (yindex = 0; yindex < compptr->MCU_height; yindex++) { - buffer_ptr = buffer[ci][yindex+yoffset] + start_col; - for (xindex = 0; xindex < compptr->MCU_width; xindex++) { - coef->MCU_buffer[blkn++] = buffer_ptr++; - } - } + compptr = cinfo->cur_comp_info[ci]; + start_col = MCU_col_num * compptr->MCU_width; + for (yindex = 0; yindex < compptr->MCU_height; yindex++) { + buffer_ptr = buffer[ci][yindex+yoffset] + start_col; + for (xindex = 0; xindex < compptr->MCU_width; xindex++) { + coef->MCU_buffer[blkn++] = buffer_ptr++; + } + } } /* Try to fetch the MCU. */ if (! (*cinfo->entropy->decode_mcu) (cinfo, coef->MCU_buffer)) { - /* Suspension forced; update state counters and exit */ - coef->MCU_vert_offset = yoffset; - coef->MCU_ctr = MCU_col_num; - return JPEG_SUSPENDED; + /* Suspension forced; update state counters and exit */ + coef->MCU_vert_offset = yoffset; + coef->MCU_ctr = MCU_col_num; + return JPEG_SUSPENDED; } } /* Completed an MCU row, but perhaps not an iMCU row */ @@ -327,8 +328,8 @@ decompress_data (j_decompress_ptr cinfo, JSAMPIMAGE output_buf) /* Force some input to be done if we are getting ahead of the input. */ while (cinfo->input_scan_number < cinfo->output_scan_number || - (cinfo->input_scan_number == cinfo->output_scan_number && - cinfo->input_iMCU_row <= cinfo->output_iMCU_row)) { + (cinfo->input_scan_number == cinfo->output_scan_number && + cinfo->input_iMCU_row <= cinfo->output_iMCU_row)) { if ((*cinfo->inputctl->consume_input)(cinfo) == JPEG_SUSPENDED) return JPEG_SUSPENDED; } @@ -359,10 +360,10 @@ decompress_data (j_decompress_ptr cinfo, JSAMPIMAGE output_buf) buffer_ptr = buffer[block_row]; output_col = 0; for (block_num = 0; block_num < compptr->width_in_blocks; block_num++) { - (*inverse_DCT) (cinfo, compptr, (JCOEFPTR) buffer_ptr, - output_ptr, output_col); - buffer_ptr++; - output_col += compptr->DCT_scaled_size; + (*inverse_DCT) (cinfo, compptr, (JCOEFPTR) buffer_ptr, + output_ptr, output_col); + buffer_ptr++; + output_col += compptr->DCT_scaled_size; } output_ptr += compptr->DCT_scaled_size; } @@ -419,8 +420,8 @@ smoothing_ok (j_decompress_ptr cinfo) if (coef->coef_bits_latch == NULL) coef->coef_bits_latch = (int *) (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, - cinfo->num_components * - (SAVED_COEFS * SIZEOF(int))); + cinfo->num_components * + (SAVED_COEFS * SIZEOF(int))); coef_bits_latch = coef->coef_bits_latch; for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; @@ -430,11 +431,11 @@ smoothing_ok (j_decompress_ptr cinfo) return FALSE; /* Verify DC & first 5 AC quantizers are nonzero to avoid zero-divide. */ if (qtable->quantval[0] == 0 || - qtable->quantval[Q01_POS] == 0 || - qtable->quantval[Q10_POS] == 0 || - qtable->quantval[Q20_POS] == 0 || - qtable->quantval[Q11_POS] == 0 || - qtable->quantval[Q02_POS] == 0) + qtable->quantval[Q01_POS] == 0 || + qtable->quantval[Q10_POS] == 0 || + qtable->quantval[Q20_POS] == 0 || + qtable->quantval[Q11_POS] == 0 || + qtable->quantval[Q02_POS] == 0) return FALSE; /* DC values must be at least partly known for all components. */ coef_bits = cinfo->coef_bits[ci]; @@ -444,7 +445,7 @@ smoothing_ok (j_decompress_ptr cinfo) for (coefi = 1; coefi <= 5; coefi++) { coef_bits_latch[coefi] = coef_bits[coefi]; if (coef_bits[coefi] != 0) - smoothing_useful = TRUE; + smoothing_useful = TRUE; } coef_bits_latch += SAVED_COEFS; } @@ -480,7 +481,7 @@ decompress_smooth_data (j_decompress_ptr cinfo, JSAMPIMAGE output_buf) /* Force some input to be done if we are getting ahead of the input. */ while (cinfo->input_scan_number <= cinfo->output_scan_number && - ! cinfo->inputctl->eoi_reached) { + ! cinfo->inputctl->eoi_reached) { if (cinfo->input_scan_number == cinfo->output_scan_number) { /* If input is working on current scan, we ordinarily want it to * have completed the current row. But if input scan is DC, @@ -489,7 +490,7 @@ decompress_smooth_data (j_decompress_ptr cinfo, JSAMPIMAGE output_buf) */ JDIMENSION delta = (cinfo->Ss == 0) ? 1 : 0; if (cinfo->input_iMCU_row > cinfo->output_iMCU_row+delta) - break; + break; } if ((*cinfo->inputctl->consume_input)(cinfo) == JPEG_SUSPENDED) return JPEG_SUSPENDED; @@ -517,15 +518,15 @@ decompress_smooth_data (j_decompress_ptr cinfo, JSAMPIMAGE output_buf) if (cinfo->output_iMCU_row > 0) { access_rows += compptr->v_samp_factor; /* prior iMCU row too */ buffer = (*cinfo->mem->access_virt_barray) - ((j_common_ptr) cinfo, coef->whole_image[ci], - (cinfo->output_iMCU_row - 1) * compptr->v_samp_factor, - (JDIMENSION) access_rows, FALSE); - buffer += compptr->v_samp_factor; /* point to current iMCU row */ + ((j_common_ptr) cinfo, coef->whole_image[ci], + (cinfo->output_iMCU_row - 1) * compptr->v_samp_factor, + (JDIMENSION) access_rows, FALSE); + buffer += compptr->v_samp_factor; /* point to current iMCU row */ first_row = FALSE; } else { buffer = (*cinfo->mem->access_virt_barray) - ((j_common_ptr) cinfo, coef->whole_image[ci], - (JDIMENSION) 0, (JDIMENSION) access_rows, FALSE); + ((j_common_ptr) cinfo, coef->whole_image[ci], + (JDIMENSION) 0, (JDIMENSION) access_rows, FALSE); first_row = TRUE; } /* Fetch component-dependent info */ @@ -543,13 +544,13 @@ decompress_smooth_data (j_decompress_ptr cinfo, JSAMPIMAGE output_buf) for (block_row = 0; block_row < block_rows; block_row++) { buffer_ptr = buffer[block_row]; if (first_row && block_row == 0) - prev_block_row = buffer_ptr; + prev_block_row = buffer_ptr; else - prev_block_row = buffer[block_row-1]; + prev_block_row = buffer[block_row-1]; if (last_row && block_row == block_rows-1) - next_block_row = buffer_ptr; + next_block_row = buffer_ptr; else - next_block_row = buffer[block_row+1]; + next_block_row = buffer[block_row+1]; /* We fetch the surrounding DC values using a sliding-register approach. * Initialize all nine here so as to do the right thing on narrow pics. */ @@ -559,102 +560,102 @@ decompress_smooth_data (j_decompress_ptr cinfo, JSAMPIMAGE output_buf) output_col = 0; last_block_column = compptr->width_in_blocks - 1; for (block_num = 0; block_num <= last_block_column; block_num++) { - /* Fetch current DCT block into workspace so we can modify it. */ - jcopy_block_row(buffer_ptr, (JBLOCKROW) workspace, (JDIMENSION) 1); - /* Update DC values */ - if (block_num < last_block_column) { - DC3 = (int) prev_block_row[1][0]; - DC6 = (int) buffer_ptr[1][0]; - DC9 = (int) next_block_row[1][0]; - } - /* Compute coefficient estimates per K.8. - * An estimate is applied only if coefficient is still zero, - * and is not known to be fully accurate. - */ - /* AC01 */ - if ((Al=coef_bits[1]) != 0 && workspace[1] == 0) { - num = 36 * Q00 * (DC4 - DC6); - if (num >= 0) { - pred = (int) (((Q01<<7) + num) / (Q01<<8)); - if (Al > 0 && pred >= (1< 0 && pred >= (1<= 0) { - pred = (int) (((Q10<<7) + num) / (Q10<<8)); - if (Al > 0 && pred >= (1< 0 && pred >= (1<= 0) { - pred = (int) (((Q20<<7) + num) / (Q20<<8)); - if (Al > 0 && pred >= (1< 0 && pred >= (1<= 0) { - pred = (int) (((Q11<<7) + num) / (Q11<<8)); - if (Al > 0 && pred >= (1< 0 && pred >= (1<= 0) { - pred = (int) (((Q02<<7) + num) / (Q02<<8)); - if (Al > 0 && pred >= (1< 0 && pred >= (1<DCT_scaled_size; + /* Fetch current DCT block into workspace so we can modify it. */ + jcopy_block_row(buffer_ptr, (JBLOCKROW) workspace, (JDIMENSION) 1); + /* Update DC values */ + if (block_num < last_block_column) { + DC3 = (int) prev_block_row[1][0]; + DC6 = (int) buffer_ptr[1][0]; + DC9 = (int) next_block_row[1][0]; + } + /* Compute coefficient estimates per K.8. + * An estimate is applied only if coefficient is still zero, + * and is not known to be fully accurate. + */ + /* AC01 */ + if ((Al=coef_bits[1]) != 0 && workspace[1] == 0) { + num = 36 * Q00 * (DC4 - DC6); + if (num >= 0) { + pred = (int) (((Q01<<7) + num) / (Q01<<8)); + if (Al > 0 && pred >= (1< 0 && pred >= (1<= 0) { + pred = (int) (((Q10<<7) + num) / (Q10<<8)); + if (Al > 0 && pred >= (1< 0 && pred >= (1<= 0) { + pred = (int) (((Q20<<7) + num) / (Q20<<8)); + if (Al > 0 && pred >= (1< 0 && pred >= (1<= 0) { + pred = (int) (((Q11<<7) + num) / (Q11<<8)); + if (Al > 0 && pred >= (1< 0 && pred >= (1<= 0) { + pred = (int) (((Q02<<7) + num) / (Q02<<8)); + if (Al > 0 && pred >= (1< 0 && pred >= (1<DCT_scaled_size; } output_ptr += compptr->DCT_scaled_size; } @@ -679,7 +680,7 @@ jinit_d_coef_controller (j_decompress_ptr cinfo, boolean need_full_buffer) coef = (my_coef_ptr) (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, - SIZEOF(my_coef_controller)); + SIZEOF(my_coef_controller)); cinfo->coef = (struct jpeg_d_coef_controller *) coef; coef->pub.start_input_pass = start_input_pass; coef->pub.start_output_pass = start_output_pass; @@ -697,20 +698,20 @@ jinit_d_coef_controller (j_decompress_ptr cinfo, boolean need_full_buffer) jpeg_component_info *compptr; for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; - ci++, compptr++) { + ci++, compptr++) { access_rows = compptr->v_samp_factor; #ifdef BLOCK_SMOOTHING_SUPPORTED /* If block smoothing could be used, need a bigger window */ if (cinfo->progressive_mode) - access_rows *= 3; + access_rows *= 3; #endif coef->whole_image[ci] = (*cinfo->mem->request_virt_barray) - ((j_common_ptr) cinfo, JPOOL_IMAGE, TRUE, - (JDIMENSION) jround_up((long) compptr->width_in_blocks, - (long) compptr->h_samp_factor), - (JDIMENSION) jround_up((long) compptr->height_in_blocks, - (long) compptr->v_samp_factor), - (JDIMENSION) access_rows); + ((j_common_ptr) cinfo, JPOOL_IMAGE, TRUE, + (JDIMENSION) jround_up((long) compptr->width_in_blocks, + (long) compptr->h_samp_factor), + (JDIMENSION) jround_up((long) compptr->height_in_blocks, + (long) compptr->v_samp_factor), + (JDIMENSION) access_rows); } coef->pub.consume_data = consume_data; coef->pub.decompress_data = decompress_data; @@ -725,7 +726,7 @@ jinit_d_coef_controller (j_decompress_ptr cinfo, boolean need_full_buffer) buffer = (JBLOCKROW) (*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE, - D_MAX_BLOCKS_IN_MCU * SIZEOF(JBLOCK)); + D_MAX_BLOCKS_IN_MCU * SIZEOF(JBLOCK)); for (i = 0; i < D_MAX_BLOCKS_IN_MCU; i++) { coef->MCU_buffer[i] = buffer + i; }