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Added optional emulation of the jpeg-7 or jpeg-8b API/ABI's

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DRC
2010-10-08 08:05:44 +00:00
parent 0b1530e1e3
commit d0d0f09d40
19 changed files with 632 additions and 103 deletions
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12
jdsample.c
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@@ -3,6 +3,7 @@
*
* Copyright (C) 1991-1996, Thomas G. Lane.
* Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
* Copyright (C) 2010, D. R. Commander.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
@@ -23,6 +24,7 @@
#include "jinclude.h"
#include "jpeglib.h"
#include "jsimd.h"
#include "jpegcomp.h"
/* Pointer to routine to upsample a single component */
@@ -420,7 +422,7 @@ jinit_upsampler (j_decompress_ptr cinfo)
/* jdmainct.c doesn't support context rows when min_DCT_scaled_size = 1,
* so don't ask for it.
*/
do_fancy = cinfo->do_fancy_upsampling && cinfo->min_DCT_scaled_size > 1;
do_fancy = cinfo->do_fancy_upsampling && _min_DCT_scaled_size > 1;
/* Verify we can handle the sampling factors, select per-component methods,
* and create storage as needed.
@@ -430,10 +432,10 @@ jinit_upsampler (j_decompress_ptr cinfo)
/* Compute size of an "input group" after IDCT scaling. This many samples
* are to be converted to max_h_samp_factor * max_v_samp_factor pixels.
*/
h_in_group = (compptr->h_samp_factor * compptr->DCT_scaled_size) /
cinfo->min_DCT_scaled_size;
v_in_group = (compptr->v_samp_factor * compptr->DCT_scaled_size) /
cinfo->min_DCT_scaled_size;
h_in_group = (compptr->h_samp_factor * _DCT_scaled_size) /
_min_DCT_scaled_size;
v_in_group = (compptr->v_samp_factor * _DCT_scaled_size) /
_min_DCT_scaled_size;
h_out_group = cinfo->max_h_samp_factor;
v_out_group = cinfo->max_v_samp_factor;
upsample->rowgroup_height[ci] = v_in_group; /* save for use later */