/*
 * jdapistd.c
 *
 * This file was part of the Independent JPEG Group's software:
 * Copyright (C) 1994-1996, Thomas G. Lane.
 * libjpeg-turbo Modifications:
 * Copyright (C) 2010, 2015-2016, D. R. Commander.
 * Copyright (C) 2015, Google, Inc.
 * For conditions of distribution and use, see the accompanying README.ijg
 * file.
 *
 * This file contains application interface code for the decompression half
 * of the JPEG library.  These are the "standard" API routines that are
 * used in the normal full-decompression case.  They are not used by a
 * transcoding-only application.  Note that if an application links in
 * jpeg_start_decompress, it will end up linking in the entire decompressor.
 * We thus must separate this file from jdapimin.c to avoid linking the
 * whole decompression library into a transcoder.
 */

#include "jinclude.h"
#include "jdmainct.h"
#include "jdcoefct.h"
#include "jdsample.h"
#include "jmemsys.h"

/* Forward declarations */
LOCAL(boolean) output_pass_setup(j_decompress_ptr cinfo);


/*
 * Decompression initialization.
 * jpeg_read_header must be completed before calling this.
 *
 * If a multipass operating mode was selected, this will do all but the
 * last pass, and thus may take a great deal of time.
 *
 * Returns FALSE if suspended.  The return value need be inspected only if
 * a suspending data source is used.
 */

GLOBAL(boolean)
jpeg_start_decompress(j_decompress_ptr cinfo) {
	if (cinfo->global_state == DSTATE_READY) {
		/* First call: initialize master control, select active modules */
		jinit_master_decompress(cinfo);
		if (cinfo->buffered_image) {
			/* No more work here; expecting jpeg_start_output next */
			cinfo->global_state = DSTATE_BUFIMAGE;
			return TRUE;
		}
		cinfo->global_state = DSTATE_PRELOAD;
	}
	if (cinfo->global_state == DSTATE_PRELOAD) {
		/* If file has multiple scans, absorb them all into the coef buffer */
		if (cinfo->inputctl->has_multiple_scans) {
#ifdef D_MULTISCAN_FILES_SUPPORTED
			for (;;) {
				int retcode;
				/* Call progress monitor hook if present */
				if (cinfo->progress != NULL)
					(*cinfo->progress->progress_monitor)((j_common_ptr) cinfo);
				/* Absorb some more input */
				retcode = (*cinfo->inputctl->consume_input)(cinfo);
				if (retcode == JPEG_SUSPENDED)
					return FALSE;
				if (retcode == JPEG_REACHED_EOI)
					break;
				/* Advance progress counter if appropriate */
				if (cinfo->progress != NULL &&
				    (retcode == JPEG_ROW_COMPLETED || retcode == JPEG_REACHED_SOS)) {
					if (++cinfo->progress->pass_counter >= cinfo->progress->pass_limit) {
						/* jdmaster underestimated number of scans; ratchet up one scan */
						cinfo->progress->pass_limit += (long) cinfo->total_iMCU_rows;
					}
				}
			}
#else
			ERREXIT(cinfo, JERR_NOT_COMPILED);
#endif /* D_MULTISCAN_FILES_SUPPORTED */
		}
		cinfo->output_scan_number = cinfo->input_scan_number;
	} else if (cinfo->global_state != DSTATE_PRESCAN)
		ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
	/* Perform any dummy output passes, and set up for the final pass */
	return output_pass_setup(cinfo);
}


/*
 * Set up for an output pass, and perform any dummy pass(es) needed.
 * Common subroutine for jpeg_start_decompress and jpeg_start_output.
 * Entry: global_state = DSTATE_PRESCAN only if previously suspended.
 * Exit: If done, returns TRUE and sets global_state for proper output mode.
 *       If suspended, returns FALSE and sets global_state = DSTATE_PRESCAN.
 */

LOCAL(boolean)
output_pass_setup(j_decompress_ptr cinfo) {
	if (cinfo->global_state != DSTATE_PRESCAN) {
		/* First call: do pass setup */
		(*cinfo->master->prepare_for_output_pass)(cinfo);
		cinfo->output_scanline = 0;
		cinfo->global_state = DSTATE_PRESCAN;
	}
	/* Loop over any required dummy passes */
	while (cinfo->master->is_dummy_pass) {
#ifdef QUANT_2PASS_SUPPORTED
		/* Crank through the dummy pass */
		while (cinfo->output_scanline < cinfo->output_height) {
			JDIMENSION last_scanline;
			/* Call progress monitor hook if present */
			if (cinfo->progress != NULL) {
				cinfo->progress->pass_counter = (long) cinfo->output_scanline;
				cinfo->progress->pass_limit = (long) cinfo->output_height;
				(*cinfo->progress->progress_monitor)((j_common_ptr) cinfo);
			}
			/* Process some data */
			last_scanline = cinfo->output_scanline;
			(*cinfo->main->process_data)(cinfo, (JSAMPARRAY) NULL,
			                             &cinfo->output_scanline, (JDIMENSION) 0);
			if (cinfo->output_scanline == last_scanline)
				return FALSE;           /* No progress made, must suspend */
		}
		/* Finish up dummy pass, and set up for another one */
		(*cinfo->master->finish_output_pass)(cinfo);
		(*cinfo->master->prepare_for_output_pass)(cinfo);
		cinfo->output_scanline = 0;
#else
		ERREXIT(cinfo, JERR_NOT_COMPILED);
#endif /* QUANT_2PASS_SUPPORTED */
	}
	/* Ready for application to drive output pass through
	 * jpeg_read_scanlines or jpeg_read_raw_data.
	 */
	cinfo->global_state = cinfo->raw_data_out ? DSTATE_RAW_OK : DSTATE_SCANNING;
	return TRUE;
}


/*
 * Enable partial scanline decompression
 *
 * Must be called after jpeg_start_decompress() and before any calls to
 * jpeg_read_scanlines() or jpeg_skip_scanlines().
 *
 * Refer to libjpeg.txt for more information.
 */

GLOBAL(void)
jpeg_crop_scanline(j_decompress_ptr cinfo, JDIMENSION *xoffset,
                   JDIMENSION *width) {
	int ci, align, orig_downsampled_width;
	JDIMENSION input_xoffset;
	boolean reinit_upsampler = FALSE;
	jpeg_component_info *compptr;

	if (cinfo->global_state != DSTATE_SCANNING || cinfo->output_scanline != 0)
		ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);

	if (!xoffset || !width)
		ERREXIT(cinfo, JERR_BAD_CROP_SPEC);

	/* xoffset and width must fall within the output image dimensions. */
	if (*width == 0 || *xoffset + *width > cinfo->output_width)
		ERREXIT(cinfo, JERR_WIDTH_OVERFLOW);

	/* No need to do anything if the caller wants the entire width. */
	if (*width == cinfo->output_width)
		return;

	/* Ensuring the proper alignment of xoffset is tricky.  At minimum, it
	 * must align with an MCU boundary, because:
	 *
	 *   (1) The IDCT is performed in blocks, and it is not feasible to modify
	 *       the algorithm so that it can transform partial blocks.
	 *   (2) Because of the SIMD extensions, any input buffer passed to the
	 *       upsampling and color conversion routines must be aligned to the
	 *       SIMD word size (for instance, 128-bit in the case of SSE2.)  The
	 *       easiest way to accomplish this without copying data is to ensure
	 *       that upsampling and color conversion begin at the start of the
	 *       first MCU column that will be inverse transformed.
	 *
	 * In practice, we actually impose a stricter alignment requirement.  We
	 * require that xoffset be a multiple of the maximum MCU column width of all
	 * of the components (the "iMCU column width.")  This is to simplify the
	 * single-pass decompression case, allowing us to use the same MCU column
	 * width for all of the components.
	 */
	align = cinfo->_min_DCT_scaled_size * cinfo->max_h_samp_factor;

	/* Adjust xoffset to the nearest iMCU boundary <= the requested value */
	input_xoffset = *xoffset;
	*xoffset = (input_xoffset / align) * align;

	/* Adjust the width so that the right edge of the output image is as
	 * requested (only the left edge is altered.)  It is important that calling
	 * programs check this value after this function returns, so that they can
	 * allocate an output buffer with the appropriate size.
	 */
	*width = *width + input_xoffset - *xoffset;
	cinfo->output_width = *width;

	/* Set the first and last iMCU columns that we must decompress.  These values
	 * will be used in single-scan decompressions.
	 */
	cinfo->master->first_iMCU_col =
			(JDIMENSION) (long) (*xoffset) / (long) align;
	cinfo->master->last_iMCU_col =
			(JDIMENSION) jdiv_round_up((long) (*xoffset + cinfo->output_width),
			                           (long) align) - 1;

	for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
	     ci++, compptr++) {
		/* Set downsampled_width to the new output width. */
		orig_downsampled_width = compptr->downsampled_width;
		compptr->downsampled_width =
				(JDIMENSION) jdiv_round_up((long) (cinfo->output_width *
				                                   compptr->h_samp_factor),
				                           (long) cinfo->max_h_samp_factor);
		if (compptr->downsampled_width < 2 && orig_downsampled_width >= 2)
			reinit_upsampler = TRUE;

		/* Set the first and last iMCU columns that we must decompress.  These
		 * values will be used in multi-scan decompressions.
		 */
		cinfo->master->first_MCU_col[ci] =
				(JDIMENSION) (long) (*xoffset * compptr->h_samp_factor) /
				(long) align;
		cinfo->master->last_MCU_col[ci] =
				(JDIMENSION) jdiv_round_up((long) ((*xoffset + cinfo->output_width) *
				                                   compptr->h_samp_factor),
				                           (long) align) - 1;
	}

	if (reinit_upsampler) {
		cinfo->master->jinit_upsampler_no_alloc = TRUE;
		jinit_upsampler(cinfo);
		cinfo->master->jinit_upsampler_no_alloc = FALSE;
	}
}


/*
 * Read some scanlines of data from the JPEG decompressor.
 *
 * The return value will be the number of lines actually read.
 * This may be less than the number requested in several cases,
 * including bottom of image, data source suspension, and operating
 * modes that emit multiple scanlines at a time.
 *
 * Note: we warn about excess calls to jpeg_read_scanlines() since
 * this likely signals an application programmer error.  However,
 * an oversize buffer (max_lines > scanlines remaining) is not an error.
 */

GLOBAL(JDIMENSION)
jpeg_read_scanlines(j_decompress_ptr cinfo, JSAMPARRAY scanlines,
                    JDIMENSION max_lines) {
	JDIMENSION row_ctr;

	if (cinfo->global_state != DSTATE_SCANNING)
		ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
	if (cinfo->output_scanline >= cinfo->output_height) {
		WARNMS(cinfo, JWRN_TOO_MUCH_DATA);
		return 0;
	}

	/* Call progress monitor hook if present */
	if (cinfo->progress != NULL) {
		cinfo->progress->pass_counter = (long) cinfo->output_scanline;
		cinfo->progress->pass_limit = (long) cinfo->output_height;
		(*cinfo->progress->progress_monitor)((j_common_ptr) cinfo);
	}

	/* Process some data */
	row_ctr = 0;
	(*cinfo->main->process_data)(cinfo, scanlines, &row_ctr, max_lines);
	cinfo->output_scanline += row_ctr;
	return row_ctr;
}


/* Dummy color convert function used by jpeg_skip_scanlines() */
LOCAL(void)
noop_convert(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
             JDIMENSION input_row, JSAMPARRAY output_buf, int num_rows) {
}


/*
 * In some cases, it is best to call jpeg_read_scanlines() and discard the
 * output, rather than skipping the scanlines, because this allows us to
 * maintain the internal state of the context-based upsampler.  In these cases,
 * we set up and tear down a dummy color converter in order to avoid valgrind
 * errors and to achieve the best possible performance.
 */

LOCAL(void)
read_and_discard_scanlines(j_decompress_ptr cinfo, JDIMENSION num_lines) {
	JDIMENSION n;
	void (*color_convert)(j_decompress_ptr cinfo, JSAMPIMAGE input_buf,
	                      JDIMENSION input_row, JSAMPARRAY output_buf,
	                      int num_rows);

	color_convert = cinfo->cconvert->color_convert;
	cinfo->cconvert->color_convert = noop_convert;

	for (n = 0; n < num_lines; n++)
		jpeg_read_scanlines(cinfo, NULL, 1);

	cinfo->cconvert->color_convert = color_convert;
}


/*
 * Called by jpeg_skip_scanlines().  This partially skips a decompress block by
 * incrementing the rowgroup counter.
 */

LOCAL(void)
increment_simple_rowgroup_ctr(j_decompress_ptr cinfo, JDIMENSION rows) {
	JDIMENSION rows_left;
	my_main_ptr main_ptr = (my_main_ptr) cinfo->main;

	/* Increment the counter to the next row group after the skipped rows. */
	main_ptr->rowgroup_ctr += rows / cinfo->max_v_samp_factor;

	/* Partially skipping a row group would involve modifying the internal state
	 * of the upsampler, so read the remaining rows into a dummy buffer instead.
	 */
	rows_left = rows % cinfo->max_v_samp_factor;
	cinfo->output_scanline += rows - rows_left;

	read_and_discard_scanlines(cinfo, rows_left);
}

/*
 * Skips some scanlines of data from the JPEG decompressor.
 *
 * The return value will be the number of lines actually skipped.  If skipping
 * num_lines would move beyond the end of the image, then the actual number of
 * lines remaining in the image is returned.  Otherwise, the return value will
 * be equal to num_lines.
 *
 * Refer to libjpeg.txt for more information.
 */

GLOBAL(JDIMENSION)
jpeg_skip_scanlines(j_decompress_ptr cinfo, JDIMENSION num_lines) {
	my_main_ptr main_ptr = (my_main_ptr) cinfo->main;
	my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
	my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
	JDIMENSION i, x;
	int y;
	JDIMENSION lines_per_iMCU_row, lines_left_in_iMCU_row, lines_after_iMCU_row;
	JDIMENSION lines_to_skip, lines_to_read;

	if (cinfo->global_state != DSTATE_SCANNING)
		ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);

	/* Do not skip past the bottom of the image. */
	if (cinfo->output_scanline + num_lines >= cinfo->output_height) {
		cinfo->output_scanline = cinfo->output_height;
		return cinfo->output_height - cinfo->output_scanline;
	}

	if (num_lines == 0)
		return 0;

	lines_per_iMCU_row = cinfo->_min_DCT_scaled_size * cinfo->max_v_samp_factor;
	lines_left_in_iMCU_row =
			(lines_per_iMCU_row - (cinfo->output_scanline % lines_per_iMCU_row)) %
			lines_per_iMCU_row;
	lines_after_iMCU_row = num_lines - lines_left_in_iMCU_row;

	/* Skip the lines remaining in the current iMCU row.  When upsampling
	 * requires context rows, we need the previous and next rows in order to read
	 * the current row.  This adds some complexity.
	 */
	if (cinfo->upsample->need_context_rows) {
		/* If the skipped lines would not move us past the current iMCU row, we
		 * read the lines and ignore them.  There might be a faster way of doing
		 * this, but we are facing increasing complexity for diminishing returns.
		 * The increasing complexity would be a by-product of meddling with the
		 * state machine used to skip context rows.  Near the end of an iMCU row,
		 * the next iMCU row may have already been entropy-decoded.  In this unique
		 * case, we will read the next iMCU row if we cannot skip past it as well.
		 */
		if ((num_lines < lines_left_in_iMCU_row + 1) ||
		    (lines_left_in_iMCU_row <= 1 && main_ptr->buffer_full &&
		     lines_after_iMCU_row < lines_per_iMCU_row + 1)) {
			read_and_discard_scanlines(cinfo, num_lines);
			return num_lines;
		}

		/* If the next iMCU row has already been entropy-decoded, make sure that
		 * we do not skip too far.
		 */
		if (lines_left_in_iMCU_row <= 1 && main_ptr->buffer_full) {
			cinfo->output_scanline += lines_left_in_iMCU_row + lines_per_iMCU_row;
			lines_after_iMCU_row -= lines_per_iMCU_row;
		} else {
			cinfo->output_scanline += lines_left_in_iMCU_row;
		}

		/* If we have just completed the first block, adjust the buffer pointers */
		if (main_ptr->iMCU_row_ctr == 0 ||
		    (main_ptr->iMCU_row_ctr == 1 && lines_left_in_iMCU_row > 2))
			set_wraparound_pointers(cinfo);
		main_ptr->buffer_full = FALSE;
		main_ptr->rowgroup_ctr = 0;
		main_ptr->context_state = CTX_PREPARE_FOR_IMCU;
		upsample->next_row_out = cinfo->max_v_samp_factor;
		upsample->rows_to_go = cinfo->output_height - cinfo->output_scanline;
	}

		/* Skipping is much simpler when context rows are not required. */
	else {
		if (num_lines < lines_left_in_iMCU_row) {
			increment_simple_rowgroup_ctr(cinfo, num_lines);
			return num_lines;
		} else {
			cinfo->output_scanline += lines_left_in_iMCU_row;
			main_ptr->buffer_full = FALSE;
			main_ptr->rowgroup_ctr = 0;
			upsample->next_row_out = cinfo->max_v_samp_factor;
			upsample->rows_to_go = cinfo->output_height - cinfo->output_scanline;
		}
	}

	/* Calculate how many full iMCU rows we can skip. */
	if (cinfo->upsample->need_context_rows)
		lines_to_skip = ((lines_after_iMCU_row - 1) / lines_per_iMCU_row) *
		                lines_per_iMCU_row;
	else
		lines_to_skip = (lines_after_iMCU_row / lines_per_iMCU_row) *
		                lines_per_iMCU_row;
	/* Calculate the number of lines that remain to be skipped after skipping all
	 * of the full iMCU rows that we can.  We will not read these lines unless we
	 * have to.
	 */
	lines_to_read = lines_after_iMCU_row - lines_to_skip;

	/* For images requiring multiple scans (progressive, non-interleaved, etc.),
	 * all of the entropy decoding occurs in jpeg_start_decompress(), assuming
	 * that the input data source is non-suspending.  This makes skipping easy.
	 */
	if (cinfo->inputctl->has_multiple_scans) {
		if (cinfo->upsample->need_context_rows) {
			cinfo->output_scanline += lines_to_skip;
			cinfo->output_iMCU_row += lines_to_skip / lines_per_iMCU_row;
			main_ptr->iMCU_row_ctr += lines_after_iMCU_row / lines_per_iMCU_row;
			/* It is complex to properly move to the middle of a context block, so
			 * read the remaining lines instead of skipping them.
			 */
			read_and_discard_scanlines(cinfo, lines_to_read);
		} else {
			cinfo->output_scanline += lines_to_skip;
			cinfo->output_iMCU_row += lines_to_skip / lines_per_iMCU_row;
			increment_simple_rowgroup_ctr(cinfo, lines_to_read);
		}
		upsample->rows_to_go = cinfo->output_height - cinfo->output_scanline;
		return num_lines;
	}

	/* Skip the iMCU rows that we can safely skip. */
	for (i = 0; i < lines_to_skip; i += lines_per_iMCU_row) {
		for (y = 0; y < coef->MCU_rows_per_iMCU_row; y++) {
			for (x = 0; x < cinfo->MCUs_per_row; x++) {
				/* Calling decode_mcu() with a NULL pointer causes it to discard the
				 * decoded coefficients.  This is ~5% faster for large subsets, but
				 * it's tough to tell a difference for smaller images.
				 */
				(*cinfo->entropy->decode_mcu)(cinfo, NULL);
			}
		}
		cinfo->input_iMCU_row++;
		cinfo->output_iMCU_row++;
		if (cinfo->input_iMCU_row < cinfo->total_iMCU_rows)
			start_iMCU_row(cinfo);
		else
			(*cinfo->inputctl->finish_input_pass)(cinfo);
	}
	cinfo->output_scanline += lines_to_skip;

	if (cinfo->upsample->need_context_rows) {
		/* Context-based upsampling keeps track of iMCU rows. */
		main_ptr->iMCU_row_ctr += lines_to_skip / lines_per_iMCU_row;

		/* It is complex to properly move to the middle of a context block, so
		 * read the remaining lines instead of skipping them.
		 */
		read_and_discard_scanlines(cinfo, lines_to_read);
	} else {
		increment_simple_rowgroup_ctr(cinfo, lines_to_read);
	}

	/* Since skipping lines involves skipping the upsampling step, the value of
	 * "rows_to_go" will become invalid unless we set it here.  NOTE: This is a
	 * bit odd, since "rows_to_go" seems to be redundantly keeping track of
	 * output_scanline.
	 */
	upsample->rows_to_go = cinfo->output_height - cinfo->output_scanline;

	/* Always skip the requested number of lines. */
	return num_lines;
}

/*
 * Alternate entry point to read raw data.
 * Processes exactly one iMCU row per call, unless suspended.
 */

GLOBAL(JDIMENSION)
jpeg_read_raw_data(j_decompress_ptr cinfo, JSAMPIMAGE data,
                   JDIMENSION max_lines) {
	JDIMENSION lines_per_iMCU_row;

	if (cinfo->global_state != DSTATE_RAW_OK)
		ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
	if (cinfo->output_scanline >= cinfo->output_height) {
		WARNMS(cinfo, JWRN_TOO_MUCH_DATA);
		return 0;
	}

	/* Call progress monitor hook if present */
	if (cinfo->progress != NULL) {
		cinfo->progress->pass_counter = (long) cinfo->output_scanline;
		cinfo->progress->pass_limit = (long) cinfo->output_height;
		(*cinfo->progress->progress_monitor)((j_common_ptr) cinfo);
	}

	/* Verify that at least one iMCU row can be returned. */
	lines_per_iMCU_row = cinfo->max_v_samp_factor * cinfo->_min_DCT_scaled_size;
	if (max_lines < lines_per_iMCU_row)
		ERREXIT(cinfo, JERR_BUFFER_SIZE);

	/* Decompress directly into user's buffer. */
	if (!(*cinfo->coef->decompress_data)(cinfo, data))
		return 0;                   /* suspension forced, can do nothing more */

	/* OK, we processed one iMCU row. */
	cinfo->output_scanline += lines_per_iMCU_row;
	return lines_per_iMCU_row;
}


/* Additional entry points for buffered-image mode. */

#ifdef D_MULTISCAN_FILES_SUPPORTED

/*
 * Initialize for an output pass in buffered-image mode.
 */

GLOBAL(boolean)
jpeg_start_output(j_decompress_ptr cinfo, int scan_number) {
	if (cinfo->global_state != DSTATE_BUFIMAGE &&
	    cinfo->global_state != DSTATE_PRESCAN)
		ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
	/* Limit scan number to valid range */
	if (scan_number <= 0)
		scan_number = 1;
	if (cinfo->inputctl->eoi_reached &&
	    scan_number > cinfo->input_scan_number)
		scan_number = cinfo->input_scan_number;
	cinfo->output_scan_number = scan_number;
	/* Perform any dummy output passes, and set up for the real pass */
	return output_pass_setup(cinfo);
}


/*
 * Finish up after an output pass in buffered-image mode.
 *
 * Returns FALSE if suspended.  The return value need be inspected only if
 * a suspending data source is used.
 */

GLOBAL(boolean)
jpeg_finish_output(j_decompress_ptr cinfo) {
	if ((cinfo->global_state == DSTATE_SCANNING ||
	     cinfo->global_state == DSTATE_RAW_OK) && cinfo->buffered_image) {
		/* Terminate this pass. */
		/* We do not require the whole pass to have been completed. */
		(*cinfo->master->finish_output_pass)(cinfo);
		cinfo->global_state = DSTATE_BUFPOST;
	} else if (cinfo->global_state != DSTATE_BUFPOST) {
		/* BUFPOST = repeat call after a suspension, anything else is error */
		ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
	}
	/* Read markers looking for SOS or EOI */
	while (cinfo->input_scan_number <= cinfo->output_scan_number &&
	       !cinfo->inputctl->eoi_reached) {
		if ((*cinfo->inputctl->consume_input)(cinfo) == JPEG_SUSPENDED)
			return FALSE;             /* Suspend, come back later */
	}
	cinfo->global_state = DSTATE_BUFIMAGE;
	return TRUE;
}

#endif /* D_MULTISCAN_FILES_SUPPORTED */
