X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?a=blobdiff_plain;ds=sidebyside;f=src%2Fjpeg%2Flibijg%2Fjcmainct.c;fp=src%2Fjpeg%2Flibijg%2Fjcmainct.c;h=0000000000000000000000000000000000000000;hb=82874940805320d00eecb834bfa8643822c49e45;hp=e0cd678a1973884d14ea7bab7e8c51a62cef5037;hpb=1481a8c42f220e3ee882275bcf0b8cb1efd84cc5;p=gdcm.git diff --git a/src/jpeg/libijg/jcmainct.c b/src/jpeg/libijg/jcmainct.c deleted file mode 100644 index e0cd678a..00000000 --- a/src/jpeg/libijg/jcmainct.c +++ /dev/null @@ -1,296 +0,0 @@ -/* - * jcmainct.c - * - * Copyright (C) 1994-1998, Thomas G. Lane. - * This file is part of the Independent JPEG Group's software. - * For conditions of distribution and use, see the accompanying README file. - * - * This file contains the main buffer controller for compression. - * The main buffer lies between the pre-processor and the JPEG - * compressor proper; it holds downsampled data in the JPEG colorspace. - */ - -#define JPEG_INTERNALS -#include "jinclude.h" -#include "jpeglib.h" - - -/* Note: currently, there is no operating mode in which a full-image buffer - * is needed at this step. If there were, that mode could not be used with - * "raw data" input, since this module is bypassed in that case. However, - * we've left the code here for possible use in special applications. - */ -#undef FULL_MAIN_BUFFER_SUPPORTED - - -/* Private buffer controller object */ - -typedef struct { - struct jpeg_c_main_controller pub; /* public fields */ - - JDIMENSION cur_iMCU_row; /* number of current iMCU row */ - JDIMENSION rowgroup_ctr; /* counts row groups received in iMCU row */ - boolean suspended; /* remember if we suspended output */ - J_BUF_MODE pass_mode; /* current operating mode */ - - /* If using just a strip buffer, this points to the entire set of buffers - * (we allocate one for each component). In the full-image case, this - * points to the currently accessible strips of the virtual arrays. - */ - JSAMPARRAY buffer[MAX_COMPONENTS]; - -#ifdef FULL_MAIN_BUFFER_SUPPORTED - /* If using full-image storage, this array holds pointers to virtual-array - * control blocks for each component. Unused if not full-image storage. - */ - jvirt_sarray_ptr whole_image[MAX_COMPONENTS]; -#endif -} my_main_controller; - -typedef my_main_controller * my_main_ptr; - - -/* Forward declarations */ -METHODDEF(void) process_data_simple_main - JPP((j_compress_ptr cinfo, JSAMPARRAY input_buf, - JDIMENSION *in_row_ctr, JDIMENSION in_rows_avail)); -#ifdef FULL_MAIN_BUFFER_SUPPORTED -METHODDEF(void) process_data_buffer_main - JPP((j_compress_ptr cinfo, JSAMPARRAY input_buf, - JDIMENSION *in_row_ctr, JDIMENSION in_rows_avail)); -#endif - - -/* - * Initialize for a processing pass. - */ - -METHODDEF(void) -start_pass_main (j_compress_ptr cinfo, J_BUF_MODE pass_mode) -{ - my_main_ptr mainPtr = (my_main_ptr) cinfo->main; - - /* Do nothing in raw-data mode. */ - if (cinfo->raw_data_in) - return; - - mainPtr->cur_iMCU_row = 0; /* initialize counters */ - mainPtr->rowgroup_ctr = 0; - mainPtr->suspended = FALSE; - mainPtr->pass_mode = pass_mode; /* save mode for use by process_data */ - - switch (pass_mode) { - case JBUF_PASS_THRU: -#ifdef FULL_MAIN_BUFFER_SUPPORTED - if (mainPtr->whole_image[0] != NULL) - ERREXIT(cinfo, JERR_BAD_BUFFER_MODE); -#endif - mainPtr->pub.process_data = process_data_simple_main; - break; -#ifdef FULL_MAIN_BUFFER_SUPPORTED - case JBUF_SAVE_SOURCE: - case JBUF_CRANK_DEST: - case JBUF_SAVE_AND_PASS: - if (mainPtr->whole_image[0] == NULL) - ERREXIT(cinfo, JERR_BAD_BUFFER_MODE); - mainPtr->pub.process_data = process_data_buffer_main; - break; -#endif - default: - ERREXIT(cinfo, JERR_BAD_BUFFER_MODE); - break; - } -} - - -/* - * Process some data. - * This routine handles the simple pass-through mode, - * where we have only a strip buffer. - */ - -METHODDEF(void) -process_data_simple_main (j_compress_ptr cinfo, - JSAMPARRAY input_buf, JDIMENSION *in_row_ctr, - JDIMENSION in_rows_avail) -{ - my_main_ptr mainPtr = (my_main_ptr) cinfo->main; - JDIMENSION data_unit = (JDIMENSION)(cinfo->data_unit); - - while (mainPtr->cur_iMCU_row < cinfo->total_iMCU_rows) { - /* Read input data if we haven't filled the main buffer yet */ - if (mainPtr->rowgroup_ctr < data_unit) - (*cinfo->prep->pre_process_data) (cinfo, - input_buf, in_row_ctr, in_rows_avail, - mainPtr->buffer, &mainPtr->rowgroup_ctr, - (JDIMENSION) data_unit); - - /* If we don't have a full iMCU row buffered, return to application for - * more data. Note that preprocessor will always pad to fill the iMCU row - * at the bottom of the image. - */ - if (mainPtr->rowgroup_ctr != data_unit) - return; - - /* Send the completed row to the compressor */ - if (! (*cinfo->codec->compress_data) (cinfo, mainPtr->buffer)) { - /* If compressor did not consume the whole row, then we must need to - * suspend processing and return to the application. In this situation - * we pretend we didn't yet consume the last input row; otherwise, if - * it happened to be the last row of the image, the application would - * think we were done. - */ - if (! mainPtr->suspended) { - (*in_row_ctr)--; - mainPtr->suspended = TRUE; - } - return; - } - /* We did finish the row. Undo our little suspension hack if a previous - * call suspended; then mark the main buffer empty. - */ - if (mainPtr->suspended) { - (*in_row_ctr)++; - mainPtr->suspended = FALSE; - } - mainPtr->rowgroup_ctr = 0; - mainPtr->cur_iMCU_row++; - } -} - - -#ifdef FULL_MAIN_BUFFER_SUPPORTED - -/* - * Process some data. - * This routine handles all of the modes that use a full-size buffer. - */ - -METHODDEF(void) -process_data_buffer_main (j_compress_ptr cinfo, - JSAMPARRAY input_buf, JDIMENSION *in_row_ctr, - JDIMENSION in_rows_avail) -{ - my_main_ptr main = (my_main_ptr) cinfo->main; - int ci; - jpeg_component_info *compptr; - boolean writing = (mainPtr->pass_mode != JBUF_CRANK_DEST); - JDIMENSION data_unit = (JDIMENSION)(cinfo->data_unit); - - while (mainPtr->cur_iMCU_row < cinfo->total_iMCU_rows) { - /* Realign the virtual buffers if at the start of an iMCU row. */ - if (mainPtr->rowgroup_ctr == 0) { - for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; - ci++, compptr++) { - mainPtr->buffer[ci] = (*cinfo->mem->access_virt_sarray) - ((j_common_ptr) cinfo, mainPtr->whole_image[ci], - mainPtr->cur_iMCU_row * (compptr->v_samp_factor * data_unit), - (JDIMENSION) (compptr->v_samp_factor * data_unit), writing); - } - /* In a read pass, pretend we just read some source data. */ - if (! writing) { - *in_row_ctr += cinfo->max_v_samp_factor * data_unit; - mainPtr->rowgroup_ctr = data_unit; - } - } - - /* If a write pass, read input data until the current iMCU row is full. */ - /* Note: preprocessor will pad if necessary to fill the last iMCU row. */ - if (writing) { - (*cinfo->prep->pre_process_data) (cinfo, - input_buf, in_row_ctr, in_rows_avail, - mainPtr->buffer, &mainPtr->rowgroup_ctr, - (JDIMENSION) data_unit); - /* Return to application if we need more data to fill the iMCU row. */ - if (mainPtr->rowgroup_ctr < data_unit) - return; - } - - /* Emit data, unless this is a sink-only pass. */ - if (mainPtr->pass_mode != JBUF_SAVE_SOURCE) { - if (! (*cinfo->codec->compress_data) (cinfo, mainPtr->buffer)) { - /* If compressor did not consume the whole row, then we must need to - * suspend processing and return to the application. In this situation - * we pretend we didn't yet consume the last input row; otherwise, if - * it happened to be the last row of the image, the application would - * think we were done. - */ - if (! mainPtr->suspended) { - (*in_row_ctr)--; - mainPtr->suspended = TRUE; - } - return; - } - /* We did finish the row. Undo our little suspension hack if a previous - * call suspended; then mark the main buffer empty. - */ - if (mainPtr->suspended) { - (*in_row_ctr)++; - mainPtr->suspended = FALSE; - } - } - - /* If get here, we are done with this iMCU row. Mark buffer empty. */ - mainPtr->rowgroup_ctr = 0; - mainPtr->cur_iMCU_row++; - } -} - -#endif /* FULL_MAIN_BUFFER_SUPPORTED */ - - -/* - * Initialize main buffer controller. - */ - -GLOBAL(void) -jinit_c_main_controller (j_compress_ptr cinfo, boolean need_full_buffer) -{ - my_main_ptr mainPtr; - int ci; - jpeg_component_info *compptr; - int data_unit = cinfo->data_unit; - - mainPtr = (my_main_ptr) - (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, - SIZEOF(my_main_controller)); - cinfo->main = (struct jpeg_c_main_controller *) mainPtr; - mainPtr->pub.start_pass = start_pass_main; - - /* We don't need to create a buffer in raw-data mode. */ - if (cinfo->raw_data_in) - return; - - /* Create the buffer. It holds downsampled data, so each component - * may be of a different size. - */ - if (need_full_buffer) { -#ifdef FULL_MAIN_BUFFER_SUPPORTED - /* Allocate a full-image virtual array for each component */ - /* Note we pad the bottom to a multiple of the iMCU height */ - for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; - ci++, compptr++) { - mainPtr->whole_image[ci] = (*cinfo->mem->request_virt_sarray) - ((j_common_ptr) cinfo, JPOOL_IMAGE, FALSE, - compptr->width_in_data_units * data_unit, - (JDIMENSION) jround_up((long) compptr->height_in_data_units, - (long) compptr->v_samp_factor) * data_unit, - (JDIMENSION) (compptr->v_samp_factor * data_unit)); - } -#else - ERREXIT(cinfo, JERR_BAD_BUFFER_MODE); -#endif - } else { -#ifdef FULL_MAIN_BUFFER_SUPPORTED - mainPtr->whole_image[0] = NULL; /* flag for no virtual arrays */ -#endif - /* Allocate a strip buffer for each component */ - for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; - ci++, compptr++) { - mainPtr->buffer[ci] = (*cinfo->mem->alloc_sarray) - ((j_common_ptr) cinfo, JPOOL_IMAGE, - compptr->width_in_data_units * data_unit, - (JDIMENSION) (compptr->v_samp_factor * data_unit)); - } - } -}