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author | Andrew Mahone <andrew.mahone@gmail.com> | 2009-06-19 02:56:00 +0000 |
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committer | Andrew Mahone <andrew.mahone@gmail.com> | 2009-06-19 02:56:00 +0000 |
commit | 6a0d931f383259b4b82fcfd1cc87700f53bbcb02 (patch) | |
tree | 04960b8122f35101bb31603af084536f307e0ae1 /apps/plugins/lib | |
parent | 4c58ad26ba462309f95790c32421130a73909f05 (diff) | |
download | rockbox-6a0d931f383259b4b82fcfd1cc87700f53bbcb02.tar.gz rockbox-6a0d931f383259b4b82fcfd1cc87700f53bbcb02.zip |
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
Diffstat (limited to 'apps/plugins/lib')
-rw-r--r-- | apps/plugins/lib/SOURCES | 3 | ||||
-rw-r--r-- | apps/plugins/lib/pluginlib_jpeg_idct_arm.S | 24 |
2 files changed, 27 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 | |||
27 | profile_plugin.c | 27 | profile_plugin.c |
28 | #endif | 28 | #endif |
29 | #ifdef HAVE_LCD_BITMAP | 29 | #ifdef HAVE_LCD_BITMAP |
30 | #ifdef CPU_ARM | ||
31 | pluginlib_jpeg_idct_arm.S | ||
32 | #endif | ||
30 | pluginlib_jpeg_mem.c | 33 | pluginlib_jpeg_mem.c |
31 | pluginlib_resize.c | 34 | pluginlib_resize.c |
32 | #ifndef HAVE_JPEG | 35 | #ifndef HAVE_JPEG |
diff --git a/apps/plugins/lib/pluginlib_jpeg_idct_arm.S b/apps/plugins/lib/pluginlib_jpeg_idct_arm.S new file mode 100644 index 0000000000..5e6149d59f --- /dev/null +++ b/apps/plugins/lib/pluginlib_jpeg_idct_arm.S | |||
@@ -0,0 +1,24 @@ | |||
1 | /*************************************************************************** | ||
2 | * __________ __ ___. | ||
3 | * Open \______ \ ____ ____ | | _\_ |__ _______ ___ | ||
4 | * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / | ||
5 | * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < | ||
6 | * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ | ||
7 | * \/ \/ \/ \/ \/ | ||
8 | * $Id$ | ||
9 | * | ||
10 | * Copyright (C) 2009 by Andrew Mahone | ||
11 | * | ||
12 | * This is a wrapper for the core jpeg_idct_arm.S | ||
13 | * | ||
14 | * This program is free software; you can redistribute it and/or | ||
15 | * modify it under the terms of the GNU General Public License | ||
16 | * as published by the Free Software Foundation; either version 2 | ||
17 | * of the License, or (at your option) any later version. | ||
18 | * | ||
19 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY | ||
20 | * KIND, either express or implied. | ||
21 | * | ||
22 | ****************************************************************************/ | ||
23 | |||
24 | #include "recorder/jpeg_idct_arm.S" | ||