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Core JPEG decoder improvements:

For >8-point vertical IDCT, transpose the coefficients while decoding them, so that the vertical IDCT can read in rows rather than columns. This improves speed a bit for this size even using the C IDCT.
Remove inline ARM asm, replacing it with an external file containing pure asm IDCT functions.
Add jpeg_ prefix to JPEG IDCT functions since some of them will now be visible globally.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21345 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Andrew Mahone 2009-06-19 02:56:00 +00:00
parent 4c58ad26ba
commit 6a0d931f38
5 changed files with 465 additions and 219 deletions

View file

@ -27,6 +27,9 @@ playergfx.c
profile_plugin.c
#endif
#ifdef HAVE_LCD_BITMAP
#ifdef CPU_ARM
pluginlib_jpeg_idct_arm.S
#endif
pluginlib_jpeg_mem.c
pluginlib_resize.c
#ifndef HAVE_JPEG