diff options
| author | ossman_ <ossman_@632fc199-4ca6-4c93-a231-07263d6284db> | 2009-03-09 13:15:56 +0000 |
|---|---|---|
| committer | ossman_ <ossman_@632fc199-4ca6-4c93-a231-07263d6284db> | 2009-03-09 13:15:56 +0000 |
| commit | 0c228e147dda7909cc905e5742737ac4121b5af5 (patch) | |
| tree | b3161bf8ffded04581c050b7670544eeed3c1c7b /jddctmgr.c | |
| parent | 93736b192df8f7ab045602aad46617fa43ee8d00 (diff) | |
Framework for supporting SIMD acceleration
Designed to impose minimal changes on the "normal" code.
git-svn-id: svn://svn.code.sf.net/p/libjpeg-turbo/code/trunk@14 632fc199-4ca6-4c93-a231-07263d6284db
Diffstat (limited to 'jddctmgr.c')
| -rw-r--r-- | jddctmgr.c | 27 |
1 files changed, 22 insertions, 5 deletions
@@ -2,6 +2,7 @@ * jddctmgr.c * * Copyright (C) 1994-1996, Thomas G. Lane. + * Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB * This file is part of the Independent JPEG Group's software. * For conditions of distribution and use, see the accompanying README file. * @@ -19,6 +20,7 @@ #include "jinclude.h" #include "jpeglib.h" #include "jdct.h" /* Private declarations for DCT subsystem */ +#include "jsimddct.h" /* @@ -105,11 +107,17 @@ start_pass (j_decompress_ptr cinfo) method = JDCT_ISLOW; /* jidctred uses islow-style table */ break; case 2: - method_ptr = jpeg_idct_2x2; + if (jsimd_can_idct_2x2()) + method_ptr = jsimd_idct_2x2; + else + method_ptr = jpeg_idct_2x2; method = JDCT_ISLOW; /* jidctred uses islow-style table */ break; case 4: - method_ptr = jpeg_idct_4x4; + if (jsimd_can_idct_4x4()) + method_ptr = jsimd_idct_4x4; + else + method_ptr = jpeg_idct_4x4; method = JDCT_ISLOW; /* jidctred uses islow-style table */ break; #endif @@ -117,19 +125,28 @@ start_pass (j_decompress_ptr cinfo) switch (cinfo->dct_method) { #ifdef DCT_ISLOW_SUPPORTED case JDCT_ISLOW: - method_ptr = jpeg_idct_islow; + if (jsimd_can_idct_islow()) + method_ptr = jsimd_idct_islow; + else + method_ptr = jpeg_idct_islow; method = JDCT_ISLOW; break; #endif #ifdef DCT_IFAST_SUPPORTED case JDCT_IFAST: - method_ptr = jpeg_idct_ifast; + if (jsimd_can_idct_ifast()) + method_ptr = jsimd_idct_ifast; + else + method_ptr = jpeg_idct_ifast; method = JDCT_IFAST; break; #endif #ifdef DCT_FLOAT_SUPPORTED case JDCT_FLOAT: - method_ptr = jpeg_idct_float; + if (jsimd_can_idct_float()) + method_ptr = jsimd_idct_float; + else + method_ptr = jpeg_idct_float; method = JDCT_FLOAT; break; #endif |