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The Independent JPEG Group's JPEG software v4a

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This commit is contained in:
Thomas G. Lane
1993-02-18 00:00:00 +00:00
committed by DRC
parent 88aeed428f
commit cc7150e281
42 changed files with 1083 additions and 451 deletions
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11
jdmcu.c
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@@ -1,7 +1,7 @@
/*
* jdmcu.c
*
* Copyright (C) 1991, 1992, Thomas G. Lane.
* Copyright (C) 1991, 1992, 1993, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@@ -102,14 +102,19 @@ reverse_DCT (decompress_info_ptr cinfo,
DCTBLOCK block;
JBLOCKROW browptr;
JSAMPARRAY srowptr;
jpeg_component_info * compptr;
long blocksperrow, bi;
short numrows, ri;
short ci;
for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
compptr = cinfo->cur_comp_info[ci];
/* don't bother to IDCT an uninteresting component */
if (! compptr->component_needed)
continue;
/* calculate size of an MCU row in this component */
blocksperrow = cinfo->cur_comp_info[ci]->downsampled_width / DCTSIZE;
numrows = cinfo->cur_comp_info[ci]->MCU_height;
blocksperrow = compptr->downsampled_width / DCTSIZE;
numrows = compptr->MCU_height;
/* iterate through all blocks in MCU row */
for (ri = 0; ri < numrows; ri++) {
browptr = coeff_data[ci][ri];