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Go ahead and call jinit_master_decompress() rather than trying to reproduce its functionality. That function does a few things that we were missing, including allocating the range limit table used by the plain C color conversion code.

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This commit is contained in:
DRC
2014-03-07 03:52:57 +00:00
parent 2409fb9d03
commit 897a525e3f
1 changed files with 10 additions and 18 deletions
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28
turbojpeg.c
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@@ -1255,16 +1255,15 @@ static int setDecodeDefaults(struct jpeg_decompress_struct *dinfo,
(*dinfo->mem->alloc_small)((j_common_ptr)dinfo, JPOOL_IMAGE,
dinfo->num_components*SIZEOF(jpeg_component_info));
dinfo->comp_info[0].h_samp_factor=tjMCUWidth[subsamp]/8;
dinfo->comp_info[0].v_samp_factor=tjMCUHeight[subsamp]/8;
dinfo->comp_info[0].component_index=0;
dinfo->cur_comp_info[0]=&dinfo->comp_info[0];
for(i=1; i<dinfo->num_components; i++)
for(i=0; i<dinfo->num_components; i++)
{
dinfo->comp_info[i].h_samp_factor=1;
dinfo->comp_info[i].v_samp_factor=1;
dinfo->comp_info[i].component_index=i;
dinfo->cur_comp_info[i]=&dinfo->comp_info[i];
jpeg_component_info *compptr=&dinfo->comp_info[i];
compptr->h_samp_factor=(i==0)? tjMCUWidth[subsamp]/8:1;
compptr->v_samp_factor=(i==0)? tjMCUHeight[subsamp]/8:1;
compptr->component_index=i;
compptr->quant_tbl_no=compptr->dc_tbl_no=compptr->ac_tbl_no=
(i==0)? 0:1;
dinfo->cur_comp_info[i]=compptr;
}
return 0;
@@ -1358,21 +1357,14 @@ DLLEXPORT int DLLCALL tjDecodeYUV(tjhandle handle, unsigned char *srcBuf,
{
retval=-1; goto bailout;
}
jpeg_calc_output_dimensions(dinfo);
if(flags&TJFLAG_FASTUPSAMPLE)
{
dinfo->do_fancy_upsampling=FALSE;
if((subsamp==TJSAMP_422 || subsamp==TJSAMP_420) && pixelFormat!=TJPF_GRAY)
useMerged=1;
}
if(useMerged)
jinit_merged_upsampler(dinfo);
else
{
jinit_color_deconverter(dinfo);
jinit_upsampler(dinfo);
(*dinfo->cconvert->start_pass)(dinfo);
}
jinit_master_decompress(dinfo);
if(!useMerged) (*dinfo->cconvert->start_pass)(dinfo);
(*dinfo->upsample->start_pass)(dinfo);
pw=PAD(width, dinfo->max_h_samp_factor);