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

1 files changed, 3 insertions, 0 deletions

diff --git a/apps/plugins/lib/SOURCES b/apps/plugins/lib/SOURCES
index 7211109271..2ed38c4f8b 100644
--- a/apps/plugins/lib/SOURCES
+++ b/apps/plugins/lib/SOURCES
@@ -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