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<html><!-- Created using the cpp_pretty_printer from the dlib C++ library. See http://dlib.net for updates. --><head><title>dlib C++ Library - jdinput.c</title></head><body bgcolor='white'><pre>
<font color='#009900'>/*
* jdinput.c
*
* Copyright (C) 1991-1997, Thomas G. Lane.
* Modified 2002-2009 by Guido Vollbeding.
* 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 input control logic for the JPEG decompressor.
* These routines are concerned with controlling the decompressor's input
* processing (marker reading and coefficient decoding). The actual input
* reading is done in jdmarker.c, jdhuff.c, and jdarith.c.
*/</font>
<font color='#0000FF'>#define</font> JPEG_INTERNALS
<font color='#0000FF'>#include</font> "<a style='text-decoration:none' href='jinclude.h.html'>jinclude.h</a>"
<font color='#0000FF'>#include</font> "<a style='text-decoration:none' href='jpeglib.h.html'>jpeglib.h</a>"
<font color='#009900'>/* Private state */</font>
<font color='#0000FF'>typedef</font> <font color='#0000FF'>struct</font> <b>{</b>
<font color='#0000FF'>struct</font> jpeg_input_controller pub; <font color='#009900'>/* public fields */</font>
<font color='#0000FF'><u>int</u></font> inheaders; <font color='#009900'>/* Nonzero until first SOS is reached */</font>
<b>}</b> my_input_controller;
<font color='#0000FF'>typedef</font> my_input_controller <font color='#5555FF'>*</font> my_inputctl_ptr;
<font color='#009900'>/* Forward declarations */</font>
<b><a name='METHODDEF'></a>METHODDEF</b><font face='Lucida Console'>(</font><font color='#0000FF'><u>int</u></font><font face='Lucida Console'>)</font> consume_markers <b><a name='JPP'></a>JPP</b><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font>j_decompress_ptr cinfo<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
<font color='#009900'>/*
* Routines to calculate various quantities related to the size of the image.
*/</font>
<font color='#009900'>/*
* Compute output image dimensions and related values.
* NOTE: this is exported for possible use by application.
* Hence it mustn't do anything that can't be done twice.
*/</font>
<b><a name='GLOBAL'></a>GLOBAL</b><font face='Lucida Console'>(</font><font color='#0000FF'><u>void</u></font><font face='Lucida Console'>)</font>
<b><a name='jpeg_core_output_dimensions'></a>jpeg_core_output_dimensions</b> <font face='Lucida Console'>(</font>j_decompress_ptr cinfo<font face='Lucida Console'>)</font>
<font color='#009900'>/* Do computations that are needed before master selection phase.
* This function is used for transcoding and full decompression.
*/</font>
<b>{</b>
<font color='#0000FF'>#ifdef</font> IDCT_SCALING_SUPPORTED
<font color='#0000FF'><u>int</u></font> ci;
jpeg_component_info <font color='#5555FF'>*</font>compptr;
<font color='#009900'>/* Compute actual output image dimensions and DCT scaling choices. */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_num <font color='#5555FF'>*</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'><</font><font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_denom<font face='Lucida Console'>)</font> <b>{</b>
<font color='#009900'>/* Provide 1/block_size scaling */</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_width <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_width, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_height <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_height, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_h_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>1</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_v_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>1</font>;
<b>}</b> <font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_num <font color='#5555FF'>*</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'><</font><font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_denom <font color='#5555FF'>*</font> <font color='#979000'>2</font><font face='Lucida Console'>)</font> <b>{</b>
<font color='#009900'>/* Provide 2/block_size scaling */</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_width <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_width <font color='#5555FF'>*</font> <font color='#979000'>2</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_height <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_height <font color='#5555FF'>*</font> <font color='#979000'>2</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_h_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>2</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_v_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>2</font>;
<b>}</b> <font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_num <font color='#5555FF'>*</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'><</font><font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_denom <font color='#5555FF'>*</font> <font color='#979000'>3</font><font face='Lucida Console'>)</font> <b>{</b>
<font color='#009900'>/* Provide 3/block_size scaling */</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_width <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_width <font color='#5555FF'>*</font> <font color='#979000'>3</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_height <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_height <font color='#5555FF'>*</font> <font color='#979000'>3</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_h_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>3</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_v_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>3</font>;
<b>}</b> <font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_num <font color='#5555FF'>*</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'><</font><font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_denom <font color='#5555FF'>*</font> <font color='#979000'>4</font><font face='Lucida Console'>)</font> <b>{</b>
<font color='#009900'>/* Provide 4/block_size scaling */</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_width <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_width <font color='#5555FF'>*</font> <font color='#979000'>4</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_height <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_height <font color='#5555FF'>*</font> <font color='#979000'>4</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_h_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>4</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_v_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>4</font>;
<b>}</b> <font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_num <font color='#5555FF'>*</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'><</font><font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_denom <font color='#5555FF'>*</font> <font color='#979000'>5</font><font face='Lucida Console'>)</font> <b>{</b>
<font color='#009900'>/* Provide 5/block_size scaling */</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_width <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_width <font color='#5555FF'>*</font> <font color='#979000'>5</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_height <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_height <font color='#5555FF'>*</font> <font color='#979000'>5</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_h_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>5</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_v_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>5</font>;
<b>}</b> <font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_num <font color='#5555FF'>*</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'><</font><font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_denom <font color='#5555FF'>*</font> <font color='#979000'>6</font><font face='Lucida Console'>)</font> <b>{</b>
<font color='#009900'>/* Provide 6/block_size scaling */</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_width <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_width <font color='#5555FF'>*</font> <font color='#979000'>6</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_height <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_height <font color='#5555FF'>*</font> <font color='#979000'>6</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_h_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>6</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_v_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>6</font>;
<b>}</b> <font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_num <font color='#5555FF'>*</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'><</font><font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_denom <font color='#5555FF'>*</font> <font color='#979000'>7</font><font face='Lucida Console'>)</font> <b>{</b>
<font color='#009900'>/* Provide 7/block_size scaling */</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_width <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_width <font color='#5555FF'>*</font> <font color='#979000'>7</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_height <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_height <font color='#5555FF'>*</font> <font color='#979000'>7</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_h_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>7</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_v_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>7</font>;
<b>}</b> <font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_num <font color='#5555FF'>*</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'><</font><font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_denom <font color='#5555FF'>*</font> <font color='#979000'>8</font><font face='Lucida Console'>)</font> <b>{</b>
<font color='#009900'>/* Provide 8/block_size scaling */</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_width <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_width <font color='#5555FF'>*</font> <font color='#979000'>8</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_height <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_height <font color='#5555FF'>*</font> <font color='#979000'>8</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_h_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>8</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_v_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>8</font>;
<b>}</b> <font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_num <font color='#5555FF'>*</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'><</font><font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_denom <font color='#5555FF'>*</font> <font color='#979000'>9</font><font face='Lucida Console'>)</font> <b>{</b>
<font color='#009900'>/* Provide 9/block_size scaling */</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_width <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_width <font color='#5555FF'>*</font> <font color='#979000'>9</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_height <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_height <font color='#5555FF'>*</font> <font color='#979000'>9</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_h_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>9</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_v_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>9</font>;
<b>}</b> <font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_num <font color='#5555FF'>*</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'><</font><font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_denom <font color='#5555FF'>*</font> <font color='#979000'>10</font><font face='Lucida Console'>)</font> <b>{</b>
<font color='#009900'>/* Provide 10/block_size scaling */</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_width <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_width <font color='#5555FF'>*</font> <font color='#979000'>10</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_height <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_height <font color='#5555FF'>*</font> <font color='#979000'>10</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_h_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>10</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_v_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>10</font>;
<b>}</b> <font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_num <font color='#5555FF'>*</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'><</font><font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_denom <font color='#5555FF'>*</font> <font color='#979000'>11</font><font face='Lucida Console'>)</font> <b>{</b>
<font color='#009900'>/* Provide 11/block_size scaling */</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_width <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_width <font color='#5555FF'>*</font> <font color='#979000'>11</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_height <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_height <font color='#5555FF'>*</font> <font color='#979000'>11</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_h_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>11</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_v_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>11</font>;
<b>}</b> <font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_num <font color='#5555FF'>*</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'><</font><font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_denom <font color='#5555FF'>*</font> <font color='#979000'>12</font><font face='Lucida Console'>)</font> <b>{</b>
<font color='#009900'>/* Provide 12/block_size scaling */</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_width <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_width <font color='#5555FF'>*</font> <font color='#979000'>12</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_height <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_height <font color='#5555FF'>*</font> <font color='#979000'>12</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_h_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>12</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_v_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>12</font>;
<b>}</b> <font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_num <font color='#5555FF'>*</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'><</font><font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_denom <font color='#5555FF'>*</font> <font color='#979000'>13</font><font face='Lucida Console'>)</font> <b>{</b>
<font color='#009900'>/* Provide 13/block_size scaling */</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_width <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_width <font color='#5555FF'>*</font> <font color='#979000'>13</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_height <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_height <font color='#5555FF'>*</font> <font color='#979000'>13</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_h_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>13</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_v_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>13</font>;
<b>}</b> <font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_num <font color='#5555FF'>*</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'><</font><font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_denom <font color='#5555FF'>*</font> <font color='#979000'>14</font><font face='Lucida Console'>)</font> <b>{</b>
<font color='#009900'>/* Provide 14/block_size scaling */</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_width <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_width <font color='#5555FF'>*</font> <font color='#979000'>14</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_height <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_height <font color='#5555FF'>*</font> <font color='#979000'>14</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_h_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>14</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_v_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>14</font>;
<b>}</b> <font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_num <font color='#5555FF'>*</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'><</font><font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>scale_denom <font color='#5555FF'>*</font> <font color='#979000'>15</font><font face='Lucida Console'>)</font> <b>{</b>
<font color='#009900'>/* Provide 15/block_size scaling */</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_width <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_width <font color='#5555FF'>*</font> <font color='#979000'>15</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_height <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_height <font color='#5555FF'>*</font> <font color='#979000'>15</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_h_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>15</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_v_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>15</font>;
<b>}</b> <font color='#0000FF'>else</font> <b>{</b>
<font color='#009900'>/* Provide 16/block_size scaling */</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_width <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_width <font color='#5555FF'>*</font> <font color='#979000'>16</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_height <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_height <font color='#5555FF'>*</font> <font color='#979000'>16</font>L, <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_h_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>16</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_v_scaled_size <font color='#5555FF'>=</font> <font color='#979000'>16</font>;
<b>}</b>
<font color='#009900'>/* Recompute dimensions of components */</font>
<font color='#0000FF'>for</font> <font face='Lucida Console'>(</font>ci <font color='#5555FF'>=</font> <font color='#979000'>0</font>, compptr <font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>comp_info; ci <font color='#5555FF'><</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>num_components;
ci<font color='#5555FF'>+</font><font color='#5555FF'>+</font>, compptr<font color='#5555FF'>+</font><font color='#5555FF'>+</font><font face='Lucida Console'>)</font> <b>{</b>
compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>DCT_h_scaled_size <font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_h_scaled_size;
compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>DCT_v_scaled_size <font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_v_scaled_size;
<b>}</b>
<font color='#0000FF'>#else</font> <font color='#009900'>/* !IDCT_SCALING_SUPPORTED */</font>
<font color='#009900'>/* Hardwire it to "no scaling" */</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_width <font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_width;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_height <font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_height;
<font color='#009900'>/* jdinput.c has already initialized DCT_scaled_size,
* and has computed unscaled downsampled_width and downsampled_height.
*/</font>
<font color='#0000FF'>#endif</font> <font color='#009900'>/* IDCT_SCALING_SUPPORTED */</font>
<b>}</b>
<b><a name='LOCAL'></a>LOCAL</b><font face='Lucida Console'>(</font><font color='#0000FF'><u>void</u></font><font face='Lucida Console'>)</font>
<b><a name='initial_setup'></a>initial_setup</b> <font face='Lucida Console'>(</font>j_decompress_ptr cinfo<font face='Lucida Console'>)</font>
<font color='#009900'>/* Called once, when first SOS marker is reached */</font>
<b>{</b>
<font color='#0000FF'><u>int</u></font> ci;
jpeg_component_info <font color='#5555FF'>*</font>compptr;
<font color='#009900'>/* Make sure image isn't bigger than I can handle */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_height <font color='#5555FF'>></font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> JPEG_MAX_DIMENSION <font color='#5555FF'>|</font><font color='#5555FF'>|</font>
<font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_width <font color='#5555FF'>></font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> JPEG_MAX_DIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>ERREXIT1</font><font face='Lucida Console'>(</font>cinfo, JERR_IMAGE_TOO_BIG, <font face='Lucida Console'>(</font><font color='#0000FF'><u>unsigned</u></font> <font color='#0000FF'><u>int</u></font><font face='Lucida Console'>)</font> JPEG_MAX_DIMENSION<font face='Lucida Console'>)</font>;
<font color='#009900'>/* For now, precision must match compiled-in value... */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>data_precision <font color='#5555FF'>!</font><font color='#5555FF'>=</font> BITS_IN_JSAMPLE<font face='Lucida Console'>)</font>
<font color='#BB00BB'>ERREXIT1</font><font face='Lucida Console'>(</font>cinfo, JERR_BAD_PRECISION, cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>data_precision<font face='Lucida Console'>)</font>;
<font color='#009900'>/* Check that number of components won't exceed internal array sizes */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>num_components <font color='#5555FF'>></font> MAX_COMPONENTS<font face='Lucida Console'>)</font>
<font color='#BB00BB'>ERREXIT2</font><font face='Lucida Console'>(</font>cinfo, JERR_COMPONENT_COUNT, cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>num_components,
MAX_COMPONENTS<font face='Lucida Console'>)</font>;
<font color='#009900'>/* Compute maximum sampling factors; check factor validity */</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>max_h_samp_factor <font color='#5555FF'>=</font> <font color='#979000'>1</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>max_v_samp_factor <font color='#5555FF'>=</font> <font color='#979000'>1</font>;
<font color='#0000FF'>for</font> <font face='Lucida Console'>(</font>ci <font color='#5555FF'>=</font> <font color='#979000'>0</font>, compptr <font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>comp_info; ci <font color='#5555FF'><</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>num_components;
ci<font color='#5555FF'>+</font><font color='#5555FF'>+</font>, compptr<font color='#5555FF'>+</font><font color='#5555FF'>+</font><font face='Lucida Console'>)</font> <b>{</b>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>h_samp_factor<font color='#5555FF'><</font><font color='#5555FF'>=</font><font color='#979000'>0</font> <font color='#5555FF'>|</font><font color='#5555FF'>|</font> compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>h_samp_factor<font color='#5555FF'>></font>MAX_SAMP_FACTOR <font color='#5555FF'>|</font><font color='#5555FF'>|</font>
compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>v_samp_factor<font color='#5555FF'><</font><font color='#5555FF'>=</font><font color='#979000'>0</font> <font color='#5555FF'>|</font><font color='#5555FF'>|</font> compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>v_samp_factor<font color='#5555FF'>></font>MAX_SAMP_FACTOR<font face='Lucida Console'>)</font>
<font color='#BB00BB'>ERREXIT</font><font face='Lucida Console'>(</font>cinfo, JERR_BAD_SAMPLING<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>max_h_samp_factor <font color='#5555FF'>=</font> <font color='#BB00BB'>MAX</font><font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>max_h_samp_factor,
compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>h_samp_factor<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>max_v_samp_factor <font color='#5555FF'>=</font> <font color='#BB00BB'>MAX</font><font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>max_v_samp_factor,
compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>v_samp_factor<font face='Lucida Console'>)</font>;
<b>}</b>
<font color='#009900'>/* Derive block_size, natural_order, and lim_Se */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>is_baseline <font color='#5555FF'>|</font><font color='#5555FF'>|</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>progressive_mode <font color='#5555FF'>&</font><font color='#5555FF'>&</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>comps_in_scan<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font> <b>{</b> <font color='#009900'>/* no pseudo SOS marker */</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'>=</font> DCTSIZE;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>natural_order <font color='#5555FF'>=</font> jpeg_natural_order;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>lim_Se <font color='#5555FF'>=</font> DCTSIZE2<font color='#5555FF'>-</font><font color='#979000'>1</font>;
<b>}</b> <font color='#0000FF'>else</font>
<font color='#0000FF'>switch</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>Se<font face='Lucida Console'>)</font> <b>{</b>
<font color='#0000FF'>case</font> <font face='Lucida Console'>(</font><font color='#979000'>1</font><font color='#5555FF'>*</font><font color='#979000'>1</font><font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>:
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'>=</font> <font color='#979000'>1</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>natural_order <font color='#5555FF'>=</font> jpeg_natural_order; <font color='#009900'>/* not needed */</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>lim_Se <font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>Se;
<font color='#0000FF'>break</font>;
<font color='#0000FF'>case</font> <font face='Lucida Console'>(</font><font color='#979000'>2</font><font color='#5555FF'>*</font><font color='#979000'>2</font><font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>:
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'>=</font> <font color='#979000'>2</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>natural_order <font color='#5555FF'>=</font> jpeg_natural_order2;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>lim_Se <font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>Se;
<font color='#0000FF'>break</font>;
<font color='#0000FF'>case</font> <font face='Lucida Console'>(</font><font color='#979000'>3</font><font color='#5555FF'>*</font><font color='#979000'>3</font><font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>:
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'>=</font> <font color='#979000'>3</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>natural_order <font color='#5555FF'>=</font> jpeg_natural_order3;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>lim_Se <font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>Se;
<font color='#0000FF'>break</font>;
<font color='#0000FF'>case</font> <font face='Lucida Console'>(</font><font color='#979000'>4</font><font color='#5555FF'>*</font><font color='#979000'>4</font><font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>:
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'>=</font> <font color='#979000'>4</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>natural_order <font color='#5555FF'>=</font> jpeg_natural_order4;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>lim_Se <font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>Se;
<font color='#0000FF'>break</font>;
<font color='#0000FF'>case</font> <font face='Lucida Console'>(</font><font color='#979000'>5</font><font color='#5555FF'>*</font><font color='#979000'>5</font><font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>:
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'>=</font> <font color='#979000'>5</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>natural_order <font color='#5555FF'>=</font> jpeg_natural_order5;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>lim_Se <font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>Se;
<font color='#0000FF'>break</font>;
<font color='#0000FF'>case</font> <font face='Lucida Console'>(</font><font color='#979000'>6</font><font color='#5555FF'>*</font><font color='#979000'>6</font><font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>:
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'>=</font> <font color='#979000'>6</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>natural_order <font color='#5555FF'>=</font> jpeg_natural_order6;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>lim_Se <font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>Se;
<font color='#0000FF'>break</font>;
<font color='#0000FF'>case</font> <font face='Lucida Console'>(</font><font color='#979000'>7</font><font color='#5555FF'>*</font><font color='#979000'>7</font><font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>:
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'>=</font> <font color='#979000'>7</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>natural_order <font color='#5555FF'>=</font> jpeg_natural_order7;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>lim_Se <font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>Se;
<font color='#0000FF'>break</font>;
<font color='#0000FF'>case</font> <font face='Lucida Console'>(</font><font color='#979000'>8</font><font color='#5555FF'>*</font><font color='#979000'>8</font><font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>:
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'>=</font> <font color='#979000'>8</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>natural_order <font color='#5555FF'>=</font> jpeg_natural_order;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>lim_Se <font color='#5555FF'>=</font> DCTSIZE2<font color='#5555FF'>-</font><font color='#979000'>1</font>;
<font color='#0000FF'>break</font>;
<font color='#0000FF'>case</font> <font face='Lucida Console'>(</font><font color='#979000'>9</font><font color='#5555FF'>*</font><font color='#979000'>9</font><font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>:
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'>=</font> <font color='#979000'>9</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>natural_order <font color='#5555FF'>=</font> jpeg_natural_order;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>lim_Se <font color='#5555FF'>=</font> DCTSIZE2<font color='#5555FF'>-</font><font color='#979000'>1</font>;
<font color='#0000FF'>break</font>;
<font color='#0000FF'>case</font> <font face='Lucida Console'>(</font><font color='#979000'>10</font><font color='#5555FF'>*</font><font color='#979000'>10</font><font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>:
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'>=</font> <font color='#979000'>10</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>natural_order <font color='#5555FF'>=</font> jpeg_natural_order;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>lim_Se <font color='#5555FF'>=</font> DCTSIZE2<font color='#5555FF'>-</font><font color='#979000'>1</font>;
<font color='#0000FF'>break</font>;
<font color='#0000FF'>case</font> <font face='Lucida Console'>(</font><font color='#979000'>11</font><font color='#5555FF'>*</font><font color='#979000'>11</font><font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>:
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'>=</font> <font color='#979000'>11</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>natural_order <font color='#5555FF'>=</font> jpeg_natural_order;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>lim_Se <font color='#5555FF'>=</font> DCTSIZE2<font color='#5555FF'>-</font><font color='#979000'>1</font>;
<font color='#0000FF'>break</font>;
<font color='#0000FF'>case</font> <font face='Lucida Console'>(</font><font color='#979000'>12</font><font color='#5555FF'>*</font><font color='#979000'>12</font><font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>:
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'>=</font> <font color='#979000'>12</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>natural_order <font color='#5555FF'>=</font> jpeg_natural_order;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>lim_Se <font color='#5555FF'>=</font> DCTSIZE2<font color='#5555FF'>-</font><font color='#979000'>1</font>;
<font color='#0000FF'>break</font>;
<font color='#0000FF'>case</font> <font face='Lucida Console'>(</font><font color='#979000'>13</font><font color='#5555FF'>*</font><font color='#979000'>13</font><font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>:
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'>=</font> <font color='#979000'>13</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>natural_order <font color='#5555FF'>=</font> jpeg_natural_order;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>lim_Se <font color='#5555FF'>=</font> DCTSIZE2<font color='#5555FF'>-</font><font color='#979000'>1</font>;
<font color='#0000FF'>break</font>;
<font color='#0000FF'>case</font> <font face='Lucida Console'>(</font><font color='#979000'>14</font><font color='#5555FF'>*</font><font color='#979000'>14</font><font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>:
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'>=</font> <font color='#979000'>14</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>natural_order <font color='#5555FF'>=</font> jpeg_natural_order;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>lim_Se <font color='#5555FF'>=</font> DCTSIZE2<font color='#5555FF'>-</font><font color='#979000'>1</font>;
<font color='#0000FF'>break</font>;
<font color='#0000FF'>case</font> <font face='Lucida Console'>(</font><font color='#979000'>15</font><font color='#5555FF'>*</font><font color='#979000'>15</font><font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>:
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'>=</font> <font color='#979000'>15</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>natural_order <font color='#5555FF'>=</font> jpeg_natural_order;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>lim_Se <font color='#5555FF'>=</font> DCTSIZE2<font color='#5555FF'>-</font><font color='#979000'>1</font>;
<font color='#0000FF'>break</font>;
<font color='#0000FF'>case</font> <font face='Lucida Console'>(</font><font color='#979000'>16</font><font color='#5555FF'>*</font><font color='#979000'>16</font><font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>:
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size <font color='#5555FF'>=</font> <font color='#979000'>16</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>natural_order <font color='#5555FF'>=</font> jpeg_natural_order;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>lim_Se <font color='#5555FF'>=</font> DCTSIZE2<font color='#5555FF'>-</font><font color='#979000'>1</font>;
<font color='#0000FF'>break</font>;
<font color='#0000FF'>default</font>:
<font color='#BB00BB'>ERREXIT4</font><font face='Lucida Console'>(</font>cinfo, JERR_BAD_PROGRESSION,
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>Ss, cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>Se, cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>Ah, cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>Al<font face='Lucida Console'>)</font>;
<font color='#0000FF'>break</font>;
<b>}</b>
<font color='#009900'>/* We initialize DCT_scaled_size and min_DCT_scaled_size to block_size.
* In the full decompressor,
* this will be overridden by jpeg_calc_output_dimensions in jdmaster.c;
* but in the transcoder,
* jpeg_calc_output_dimensions is not used, so we must do it here.
*/</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_h_scaled_size <font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>min_DCT_v_scaled_size <font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size;
<font color='#009900'>/* Compute dimensions of components */</font>
<font color='#0000FF'>for</font> <font face='Lucida Console'>(</font>ci <font color='#5555FF'>=</font> <font color='#979000'>0</font>, compptr <font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>comp_info; ci <font color='#5555FF'><</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>num_components;
ci<font color='#5555FF'>+</font><font color='#5555FF'>+</font>, compptr<font color='#5555FF'>+</font><font color='#5555FF'>+</font><font face='Lucida Console'>)</font> <b>{</b>
compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>DCT_h_scaled_size <font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size;
compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>DCT_v_scaled_size <font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size;
<font color='#009900'>/* Size in DCT blocks */</font>
compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>width_in_blocks <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_width <font color='#5555FF'>*</font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>h_samp_factor,
<font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>max_h_samp_factor <font color='#5555FF'>*</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>height_in_blocks <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_height <font color='#5555FF'>*</font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>v_samp_factor,
<font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>max_v_samp_factor <font color='#5555FF'>*</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
<font color='#009900'>/* downsampled_width and downsampled_height will also be overridden by
* jdmaster.c if we are doing full decompression. The transcoder library
* doesn't use these values, but the calling application might.
*/</font>
<font color='#009900'>/* Size in samples */</font>
compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>downsampled_width <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_width <font color='#5555FF'>*</font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>h_samp_factor,
<font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>max_h_samp_factor<font face='Lucida Console'>)</font>;
compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>downsampled_height <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_height <font color='#5555FF'>*</font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>v_samp_factor,
<font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>max_v_samp_factor<font face='Lucida Console'>)</font>;
<font color='#009900'>/* Mark component needed, until color conversion says otherwise */</font>
compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>component_needed <font color='#5555FF'>=</font> TRUE;
<font color='#009900'>/* Mark no quantization table yet saved for component */</font>
compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>quant_table <font color='#5555FF'>=</font> NULL;
<b>}</b>
<font color='#009900'>/* Compute number of fully interleaved MCU rows. */</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>total_iMCU_rows <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_height,
<font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>max_v_samp_factor <font color='#5555FF'>*</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
<font color='#009900'>/* Decide whether file contains multiple scans */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>comps_in_scan <font color='#5555FF'><</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>num_components <font color='#5555FF'>|</font><font color='#5555FF'>|</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>progressive_mode<font face='Lucida Console'>)</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>inputctl<font color='#5555FF'>-</font><font color='#5555FF'>></font>has_multiple_scans <font color='#5555FF'>=</font> TRUE;
<font color='#0000FF'>else</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>inputctl<font color='#5555FF'>-</font><font color='#5555FF'>></font>has_multiple_scans <font color='#5555FF'>=</font> FALSE;
<b>}</b>
<b><a name='LOCAL'></a>LOCAL</b><font face='Lucida Console'>(</font><font color='#0000FF'><u>void</u></font><font face='Lucida Console'>)</font>
<b><a name='per_scan_setup'></a>per_scan_setup</b> <font face='Lucida Console'>(</font>j_decompress_ptr cinfo<font face='Lucida Console'>)</font>
<font color='#009900'>/* Do computations that are needed before processing a JPEG scan */</font>
<font color='#009900'>/* cinfo->comps_in_scan and cinfo->cur_comp_info[] were set from SOS marker */</font>
<b>{</b>
<font color='#0000FF'><u>int</u></font> ci, mcublks, tmp;
jpeg_component_info <font color='#5555FF'>*</font>compptr;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>comps_in_scan <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>1</font><font face='Lucida Console'>)</font> <b>{</b>
<font color='#009900'>/* Noninterleaved (single-component) scan */</font>
compptr <font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>cur_comp_info[<font color='#979000'>0</font>];
<font color='#009900'>/* Overall image size in MCUs */</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>MCUs_per_row <font color='#5555FF'>=</font> compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>width_in_blocks;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>MCU_rows_in_scan <font color='#5555FF'>=</font> compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>height_in_blocks;
<font color='#009900'>/* For noninterleaved scan, always one block per MCU */</font>
compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>MCU_width <font color='#5555FF'>=</font> <font color='#979000'>1</font>;
compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>MCU_height <font color='#5555FF'>=</font> <font color='#979000'>1</font>;
compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>MCU_blocks <font color='#5555FF'>=</font> <font color='#979000'>1</font>;
compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>MCU_sample_width <font color='#5555FF'>=</font> compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>DCT_h_scaled_size;
compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>last_col_width <font color='#5555FF'>=</font> <font color='#979000'>1</font>;
<font color='#009900'>/* For noninterleaved scans, it is convenient to define last_row_height
* as the number of block rows present in the last iMCU row.
*/</font>
tmp <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>int</u></font><font face='Lucida Console'>)</font> <font face='Lucida Console'>(</font>compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>height_in_blocks <font color='#5555FF'>%</font> compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>v_samp_factor<font face='Lucida Console'>)</font>;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>tmp <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> tmp <font color='#5555FF'>=</font> compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>v_samp_factor;
compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>last_row_height <font color='#5555FF'>=</font> tmp;
<font color='#009900'>/* Prepare array describing MCU composition */</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>blocks_in_MCU <font color='#5555FF'>=</font> <font color='#979000'>1</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>MCU_membership[<font color='#979000'>0</font>] <font color='#5555FF'>=</font> <font color='#979000'>0</font>;
<b>}</b> <font color='#0000FF'>else</font> <b>{</b>
<font color='#009900'>/* Interleaved (multi-component) scan */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>comps_in_scan <font color='#5555FF'><</font><font color='#5555FF'>=</font> <font color='#979000'>0</font> <font color='#5555FF'>|</font><font color='#5555FF'>|</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>comps_in_scan <font color='#5555FF'>></font> MAX_COMPS_IN_SCAN<font face='Lucida Console'>)</font>
<font color='#BB00BB'>ERREXIT2</font><font face='Lucida Console'>(</font>cinfo, JERR_COMPONENT_COUNT, cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>comps_in_scan,
MAX_COMPS_IN_SCAN<font face='Lucida Console'>)</font>;
<font color='#009900'>/* Overall image size in MCUs */</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>MCUs_per_row <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_width,
<font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>max_h_samp_factor <font color='#5555FF'>*</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>MCU_rows_in_scan <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JDIMENSION<font face='Lucida Console'>)</font>
<font color='#BB00BB'>jdiv_round_up</font><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>image_height,
<font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font><font face='Lucida Console'>)</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>max_v_samp_factor <font color='#5555FF'>*</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>block_size<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>blocks_in_MCU <font color='#5555FF'>=</font> <font color='#979000'>0</font>;
<font color='#0000FF'>for</font> <font face='Lucida Console'>(</font>ci <font color='#5555FF'>=</font> <font color='#979000'>0</font>; ci <font color='#5555FF'><</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>comps_in_scan; ci<font color='#5555FF'>+</font><font color='#5555FF'>+</font><font face='Lucida Console'>)</font> <b>{</b>
compptr <font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>cur_comp_info[ci];
<font color='#009900'>/* Sampling factors give # of blocks of component in each MCU */</font>
compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>MCU_width <font color='#5555FF'>=</font> compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>h_samp_factor;
compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>MCU_height <font color='#5555FF'>=</font> compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>v_samp_factor;
compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>MCU_blocks <font color='#5555FF'>=</font> compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>MCU_width <font color='#5555FF'>*</font> compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>MCU_height;
compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>MCU_sample_width <font color='#5555FF'>=</font> compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>MCU_width <font color='#5555FF'>*</font> compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>DCT_h_scaled_size;
<font color='#009900'>/* Figure number of non-dummy blocks in last MCU column & row */</font>
tmp <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>int</u></font><font face='Lucida Console'>)</font> <font face='Lucida Console'>(</font>compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>width_in_blocks <font color='#5555FF'>%</font> compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>MCU_width<font face='Lucida Console'>)</font>;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>tmp <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> tmp <font color='#5555FF'>=</font> compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>MCU_width;
compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>last_col_width <font color='#5555FF'>=</font> tmp;
tmp <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>int</u></font><font face='Lucida Console'>)</font> <font face='Lucida Console'>(</font>compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>height_in_blocks <font color='#5555FF'>%</font> compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>MCU_height<font face='Lucida Console'>)</font>;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>tmp <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> tmp <font color='#5555FF'>=</font> compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>MCU_height;
compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>last_row_height <font color='#5555FF'>=</font> tmp;
<font color='#009900'>/* Prepare array describing MCU composition */</font>
mcublks <font color='#5555FF'>=</font> compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>MCU_blocks;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>blocks_in_MCU <font color='#5555FF'>+</font> mcublks <font color='#5555FF'>></font> D_MAX_BLOCKS_IN_MCU<font face='Lucida Console'>)</font>
<font color='#BB00BB'>ERREXIT</font><font face='Lucida Console'>(</font>cinfo, JERR_BAD_MCU_SIZE<font face='Lucida Console'>)</font>;
<font color='#0000FF'>while</font> <font face='Lucida Console'>(</font>mcublks<font color='#5555FF'>-</font><font color='#5555FF'>-</font> <font color='#5555FF'>></font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> <b>{</b>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>MCU_membership[cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>blocks_in_MCU<font color='#5555FF'>+</font><font color='#5555FF'>+</font>] <font color='#5555FF'>=</font> ci;
<b>}</b>
<b>}</b>
<b>}</b>
<b>}</b>
<font color='#009900'>/*
* Save away a copy of the Q-table referenced by each component present
* in the current scan, unless already saved during a prior scan.
*
* In a multiple-scan JPEG file, the encoder could assign different components
* the same Q-table slot number, but change table definitions between scans
* so that each component uses a different Q-table. (The IJG encoder is not
* currently capable of doing this, but other encoders might.) Since we want
* to be able to dequantize all the components at the end of the file, this
* means that we have to save away the table actually used for each component.
* We do this by copying the table at the start of the first scan containing
* the component.
* The JPEG spec prohibits the encoder from changing the contents of a Q-table
* slot between scans of a component using that slot. If the encoder does so
* anyway, this decoder will simply use the Q-table values that were current
* at the start of the first scan for the component.
*
* The decompressor output side looks only at the saved quant tables,
* not at the current Q-table slots.
*/</font>
<b><a name='LOCAL'></a>LOCAL</b><font face='Lucida Console'>(</font><font color='#0000FF'><u>void</u></font><font face='Lucida Console'>)</font>
<b><a name='latch_quant_tables'></a>latch_quant_tables</b> <font face='Lucida Console'>(</font>j_decompress_ptr cinfo<font face='Lucida Console'>)</font>
<b>{</b>
<font color='#0000FF'><u>int</u></font> ci, qtblno;
jpeg_component_info <font color='#5555FF'>*</font>compptr;
JQUANT_TBL <font color='#5555FF'>*</font> qtbl;
<font color='#0000FF'>for</font> <font face='Lucida Console'>(</font>ci <font color='#5555FF'>=</font> <font color='#979000'>0</font>; ci <font color='#5555FF'><</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>comps_in_scan; ci<font color='#5555FF'>+</font><font color='#5555FF'>+</font><font face='Lucida Console'>)</font> <b>{</b>
compptr <font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>cur_comp_info[ci];
<font color='#009900'>/* No work if we already saved Q-table for this component */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>quant_table <font color='#5555FF'>!</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font>
<font color='#0000FF'>continue</font>;
<font color='#009900'>/* Make sure specified quantization table is present */</font>
qtblno <font color='#5555FF'>=</font> compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>quant_tbl_no;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>qtblno <font color='#5555FF'><</font> <font color='#979000'>0</font> <font color='#5555FF'>|</font><font color='#5555FF'>|</font> qtblno <font color='#5555FF'>></font><font color='#5555FF'>=</font> NUM_QUANT_TBLS <font color='#5555FF'>|</font><font color='#5555FF'>|</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>quant_tbl_ptrs[qtblno] <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font>
<font color='#BB00BB'>ERREXIT1</font><font face='Lucida Console'>(</font>cinfo, JERR_NO_QUANT_TABLE, qtblno<font face='Lucida Console'>)</font>;
<font color='#009900'>/* OK, save away the quantization table */</font>
qtbl <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>JQUANT_TBL <font color='#5555FF'>*</font><font face='Lucida Console'>)</font>
<font face='Lucida Console'>(</font><font color='#5555FF'>*</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>mem<font color='#5555FF'>-</font><font color='#5555FF'>></font>alloc_small<font face='Lucida Console'>)</font> <font face='Lucida Console'>(</font><font face='Lucida Console'>(</font>j_common_ptr<font face='Lucida Console'>)</font> cinfo, JPOOL_IMAGE,
<font color='#BB00BB'>SIZEOF</font><font face='Lucida Console'>(</font>JQUANT_TBL<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
<font color='#BB00BB'>MEMCOPY</font><font face='Lucida Console'>(</font>qtbl, cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>quant_tbl_ptrs[qtblno], <font color='#BB00BB'>SIZEOF</font><font face='Lucida Console'>(</font>JQUANT_TBL<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
compptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>quant_table <font color='#5555FF'>=</font> qtbl;
<b>}</b>
<b>}</b>
<font color='#009900'>/*
* Initialize the input modules to read a scan of compressed data.
* The first call to this is done by jdmaster.c after initializing
* the entire decompressor (during jpeg_start_decompress).
* Subsequent calls come from consume_markers, below.
*/</font>
<b><a name='METHODDEF'></a>METHODDEF</b><font face='Lucida Console'>(</font><font color='#0000FF'><u>void</u></font><font face='Lucida Console'>)</font>
<b><a name='start_input_pass'></a>start_input_pass</b> <font face='Lucida Console'>(</font>j_decompress_ptr cinfo<font face='Lucida Console'>)</font>
<b>{</b>
<font color='#BB00BB'>per_scan_setup</font><font face='Lucida Console'>(</font>cinfo<font face='Lucida Console'>)</font>;
<font color='#BB00BB'>latch_quant_tables</font><font face='Lucida Console'>(</font>cinfo<font face='Lucida Console'>)</font>;
<font face='Lucida Console'>(</font><font color='#5555FF'>*</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>entropy<font color='#5555FF'>-</font><font color='#5555FF'>></font>start_pass<font face='Lucida Console'>)</font> <font face='Lucida Console'>(</font>cinfo<font face='Lucida Console'>)</font>;
<font face='Lucida Console'>(</font><font color='#5555FF'>*</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>coef<font color='#5555FF'>-</font><font color='#5555FF'>></font>start_input_pass<font face='Lucida Console'>)</font> <font face='Lucida Console'>(</font>cinfo<font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>inputctl<font color='#5555FF'>-</font><font color='#5555FF'>></font>consume_input <font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>coef<font color='#5555FF'>-</font><font color='#5555FF'>></font>consume_data;
<b>}</b>
<font color='#009900'>/*
* Finish up after inputting a compressed-data scan.
* This is called by the coefficient controller after it's read all
* the expected data of the scan.
*/</font>
<b><a name='METHODDEF'></a>METHODDEF</b><font face='Lucida Console'>(</font><font color='#0000FF'><u>void</u></font><font face='Lucida Console'>)</font>
<b><a name='finish_input_pass'></a>finish_input_pass</b> <font face='Lucida Console'>(</font>j_decompress_ptr cinfo<font face='Lucida Console'>)</font>
<b>{</b>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>inputctl<font color='#5555FF'>-</font><font color='#5555FF'>></font>consume_input <font color='#5555FF'>=</font> consume_markers;
<b>}</b>
<font color='#009900'>/*
* Read JPEG markers before, between, or after compressed-data scans.
* Change state as necessary when a new scan is reached.
* Return value is JPEG_SUSPENDED, JPEG_REACHED_SOS, or JPEG_REACHED_EOI.
*
* The consume_input method pointer points either here or to the
* coefficient controller's consume_data routine, depending on whether
* we are reading a compressed data segment or inter-segment markers.
*
* Note: This function should NOT return a pseudo SOS marker (with zero
* component number) to the caller. A pseudo marker received by
* read_markers is processed and then skipped for other markers.
*/</font>
<b><a name='METHODDEF'></a>METHODDEF</b><font face='Lucida Console'>(</font><font color='#0000FF'><u>int</u></font><font face='Lucida Console'>)</font>
<b><a name='consume_markers'></a>consume_markers</b> <font face='Lucida Console'>(</font>j_decompress_ptr cinfo<font face='Lucida Console'>)</font>
<b>{</b>
my_inputctl_ptr inputctl <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>my_inputctl_ptr<font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>inputctl;
<font color='#0000FF'><u>int</u></font> val;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>inputctl<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.eoi_reached<font face='Lucida Console'>)</font> <font color='#009900'>/* After hitting EOI, read no further */</font>
<font color='#0000FF'>return</font> JPEG_REACHED_EOI;
<font color='#0000FF'>for</font> <font face='Lucida Console'>(</font>;;<font face='Lucida Console'>)</font> <b>{</b> <font color='#009900'>/* Loop to pass pseudo SOS marker */</font>
val <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font><font color='#5555FF'>*</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>marker<font color='#5555FF'>-</font><font color='#5555FF'>></font>read_markers<font face='Lucida Console'>)</font> <font face='Lucida Console'>(</font>cinfo<font face='Lucida Console'>)</font>;
<font color='#0000FF'>switch</font> <font face='Lucida Console'>(</font>val<font face='Lucida Console'>)</font> <b>{</b>
<font color='#0000FF'>case</font> JPEG_REACHED_SOS: <font color='#009900'>/* Found SOS */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>inputctl<font color='#5555FF'>-</font><font color='#5555FF'>></font>inheaders<font face='Lucida Console'>)</font> <b>{</b> <font color='#009900'>/* 1st SOS */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>inputctl<font color='#5555FF'>-</font><font color='#5555FF'>></font>inheaders <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>1</font><font face='Lucida Console'>)</font>
<font color='#BB00BB'>initial_setup</font><font face='Lucida Console'>(</font>cinfo<font face='Lucida Console'>)</font>;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>comps_in_scan <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> <b>{</b> <font color='#009900'>/* pseudo SOS marker */</font>
inputctl<font color='#5555FF'>-</font><font color='#5555FF'>></font>inheaders <font color='#5555FF'>=</font> <font color='#979000'>2</font>;
<font color='#0000FF'>break</font>;
<b>}</b>
inputctl<font color='#5555FF'>-</font><font color='#5555FF'>></font>inheaders <font color='#5555FF'>=</font> <font color='#979000'>0</font>;
<font color='#009900'>/* Note: start_input_pass must be called by jdmaster.c
* before any more input can be consumed. jdapimin.c is
* responsible for enforcing this sequencing.
*/</font>
<b>}</b> <font color='#0000FF'>else</font> <b>{</b> <font color='#009900'>/* 2nd or later SOS marker */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#5555FF'>!</font> inputctl<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.has_multiple_scans<font face='Lucida Console'>)</font>
<font color='#BB00BB'>ERREXIT</font><font face='Lucida Console'>(</font>cinfo, JERR_EOI_EXPECTED<font face='Lucida Console'>)</font>; <font color='#009900'>/* Oops, I wasn't expecting this! */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>comps_in_scan <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> <font color='#009900'>/* unexpected pseudo SOS marker */</font>
<font color='#0000FF'>break</font>;
<font color='#BB00BB'>start_input_pass</font><font face='Lucida Console'>(</font>cinfo<font face='Lucida Console'>)</font>;
<b>}</b>
<font color='#0000FF'>return</font> val;
<font color='#0000FF'>case</font> JPEG_REACHED_EOI: <font color='#009900'>/* Found EOI */</font>
inputctl<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.eoi_reached <font color='#5555FF'>=</font> TRUE;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>inputctl<font color='#5555FF'>-</font><font color='#5555FF'>></font>inheaders<font face='Lucida Console'>)</font> <b>{</b> <font color='#009900'>/* Tables-only datastream, apparently */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>marker<font color='#5555FF'>-</font><font color='#5555FF'>></font>saw_SOF<font face='Lucida Console'>)</font>
<font color='#BB00BB'>ERREXIT</font><font face='Lucida Console'>(</font>cinfo, JERR_SOF_NO_SOS<font face='Lucida Console'>)</font>;
<b>}</b> <font color='#0000FF'>else</font> <b>{</b>
<font color='#009900'>/* Prevent infinite loop in coef ctlr's decompress_data routine
* if user set output_scan_number larger than number of scans.
*/</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_scan_number <font color='#5555FF'>></font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>input_scan_number<font face='Lucida Console'>)</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>output_scan_number <font color='#5555FF'>=</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>input_scan_number;
<b>}</b>
<font color='#0000FF'>return</font> val;
<font color='#0000FF'>case</font> JPEG_SUSPENDED:
<font color='#0000FF'>return</font> val;
<font color='#0000FF'>default</font>:
<font color='#0000FF'>return</font> val;
<b>}</b>
<b>}</b>
<b>}</b>
<font color='#009900'>/*
* Reset state to begin a fresh datastream.
*/</font>
<b><a name='METHODDEF'></a>METHODDEF</b><font face='Lucida Console'>(</font><font color='#0000FF'><u>void</u></font><font face='Lucida Console'>)</font>
<b><a name='reset_input_controller'></a>reset_input_controller</b> <font face='Lucida Console'>(</font>j_decompress_ptr cinfo<font face='Lucida Console'>)</font>
<b>{</b>
my_inputctl_ptr inputctl <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>my_inputctl_ptr<font face='Lucida Console'>)</font> cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>inputctl;
inputctl<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.consume_input <font color='#5555FF'>=</font> consume_markers;
inputctl<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.has_multiple_scans <font color='#5555FF'>=</font> FALSE; <font color='#009900'>/* "unknown" would be better */</font>
inputctl<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.eoi_reached <font color='#5555FF'>=</font> FALSE;
inputctl<font color='#5555FF'>-</font><font color='#5555FF'>></font>inheaders <font color='#5555FF'>=</font> <font color='#979000'>1</font>;
<font color='#009900'>/* Reset other modules */</font>
<font face='Lucida Console'>(</font><font color='#5555FF'>*</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>err<font color='#5555FF'>-</font><font color='#5555FF'>></font>reset_error_mgr<font face='Lucida Console'>)</font> <font face='Lucida Console'>(</font><font face='Lucida Console'>(</font>j_common_ptr<font face='Lucida Console'>)</font> cinfo<font face='Lucida Console'>)</font>;
<font face='Lucida Console'>(</font><font color='#5555FF'>*</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>marker<font color='#5555FF'>-</font><font color='#5555FF'>></font>reset_marker_reader<font face='Lucida Console'>)</font> <font face='Lucida Console'>(</font>cinfo<font face='Lucida Console'>)</font>;
<font color='#009900'>/* Reset progression state -- would be cleaner if entropy decoder did this */</font>
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>coef_bits <font color='#5555FF'>=</font> NULL;
<b>}</b>
<font color='#009900'>/*
* Initialize the input controller module.
* This is called only once, when the decompression object is created.
*/</font>
<b><a name='GLOBAL'></a>GLOBAL</b><font face='Lucida Console'>(</font><font color='#0000FF'><u>void</u></font><font face='Lucida Console'>)</font>
<b><a name='jinit_input_controller'></a>jinit_input_controller</b> <font face='Lucida Console'>(</font>j_decompress_ptr cinfo<font face='Lucida Console'>)</font>
<b>{</b>
my_inputctl_ptr inputctl;
<font color='#009900'>/* Create subobject in permanent pool */</font>
inputctl <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>my_inputctl_ptr<font face='Lucida Console'>)</font>
<font face='Lucida Console'>(</font><font color='#5555FF'>*</font>cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>mem<font color='#5555FF'>-</font><font color='#5555FF'>></font>alloc_small<font face='Lucida Console'>)</font> <font face='Lucida Console'>(</font><font face='Lucida Console'>(</font>j_common_ptr<font face='Lucida Console'>)</font> cinfo, JPOOL_PERMANENT,
<font color='#BB00BB'>SIZEOF</font><font face='Lucida Console'>(</font>my_input_controller<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
cinfo<font color='#5555FF'>-</font><font color='#5555FF'>></font>inputctl <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font><font color='#0000FF'>struct</font> jpeg_input_controller <font color='#5555FF'>*</font><font face='Lucida Console'>)</font> inputctl;
<font color='#009900'>/* Initialize method pointers */</font>
inputctl<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.consume_input <font color='#5555FF'>=</font> consume_markers;
inputctl<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.reset_input_controller <font color='#5555FF'>=</font> reset_input_controller;
inputctl<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.start_input_pass <font color='#5555FF'>=</font> start_input_pass;
inputctl<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.finish_input_pass <font color='#5555FF'>=</font> finish_input_pass;
<font color='#009900'>/* Initialize state: can't use reset_input_controller since we don't
* want to try to reset other modules yet.
*/</font>
inputctl<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.has_multiple_scans <font color='#5555FF'>=</font> FALSE; <font color='#009900'>/* "unknown" would be better */</font>
inputctl<font color='#5555FF'>-</font><font color='#5555FF'>></font>pub.eoi_reached <font color='#5555FF'>=</font> FALSE;
inputctl<font color='#5555FF'>-</font><font color='#5555FF'>></font>inheaders <font color='#5555FF'>=</font> <font color='#979000'>1</font>;
<b>}</b>
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