Intel® Integrated Performance Primitives
Deliberate problems developing high-performance vision, signal, security, and storage applications.
Announcements
FPGA community forums and blogs on community.intel.com are migrating to the new Altera Community and are read-only. For urgent support needs during this transition, please visit the FPGA Design Resources page or contact an Altera Authorized Distributor.
6814 Discussions

cross-arch jpeg example

Maciej_K_
Beginner
‎02-09-2004 08:21 PM
755 Views
It doesn't work well for me. It seems that that encoder passes a raw quantization tables to ippiDCTQuantFwdTableInit_JPEG_8u16u() instead a zig-zag ordered ones. I'm using VC++ ( win32 ).
0 Kudos

Link Copied

1 Reply
Intel_C_Intel
Employee
‎02-10-2004 05:32 PM
755 Views

Oh, yes, you are right, it is our mistake. Fortunately, it is easy to fix. You need to change function write_dqt(), file jpgmisc.c, line 673:
instead of
status = write_byte(quant_tbl[zig_zag_tab_index],bitstream);
you need
status = write_byte(quant_tbl,bitstream);

Hope it helps.
Thanks for your report.

Regards,
Vladimir

0 Kudos
Copy link
Reply

Community support is provided Monday to Friday. Other contact methods are available here.

Intel does not verify all solutions, including but not limited to any file transfers that may appear in this community. Accordingly, Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade.

For more complete information about compiler optimizations, see our Optimization Notice.