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libswscale/x86/yuv2rgb_mmx.c

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00001 /*
00002  * software YUV to RGB converter
00003  *
00004  * Copyright (C) 2009 Konstantin Shishkov
00005  *
00006  * MMX/MMX2 template stuff (needed for fast movntq support),
00007  * 1,4,8bpp support and context / deglobalize stuff
00008  * by Michael Niedermayer (michaelni@gmx.at)
00009  *
00010  * This file is part of FFmpeg.
00011  *
00012  * FFmpeg is free software; you can redistribute it and/or
00013  * modify it under the terms of the GNU Lesser General Public
00014  * License as published by the Free Software Foundation; either
00015  * version 2.1 of the License, or (at your option) any later version.
00016  *
00017  * FFmpeg is distributed in the hope that it will be useful,
00018  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00019  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00020  * Lesser General Public License for more details.
00021  *
00022  * You should have received a copy of the GNU Lesser General Public
00023  * License along with FFmpeg; if not, write to the Free Software
00024  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00025  */
00026 
00027 #include <stdio.h>
00028 #include <stdlib.h>
00029 #include <inttypes.h>
00030 #include <assert.h>
00031 
00032 #include "config.h"
00033 #include "libswscale/rgb2rgb.h"
00034 #include "libswscale/swscale.h"
00035 #include "libswscale/swscale_internal.h"
00036 #include "libavutil/x86_cpu.h"
00037 #include "libavutil/cpu.h"
00038 
00039 #define DITHER1XBPP // only for MMX
00040 
00041 /* hope these constant values are cache line aligned */
00042 DECLARE_ASM_CONST(8, uint64_t, mmx_00ffw)   = 0x00ff00ff00ff00ffULL;
00043 DECLARE_ASM_CONST(8, uint64_t, mmx_redmask) = 0xf8f8f8f8f8f8f8f8ULL;
00044 DECLARE_ASM_CONST(8, uint64_t, mmx_grnmask) = 0xfcfcfcfcfcfcfcfcULL;
00045 DECLARE_ASM_CONST(8, uint64_t, pb_e0) = 0xe0e0e0e0e0e0e0e0ULL;
00046 DECLARE_ASM_CONST(8, uint64_t, pb_03) = 0x0303030303030303ULL;
00047 DECLARE_ASM_CONST(8, uint64_t, pb_07) = 0x0707070707070707ULL;
00048 
00049 //MMX versions
00050 #if HAVE_MMX
00051 #undef RENAME
00052 #undef COMPILE_TEMPLATE_MMX2
00053 #define COMPILE_TEMPLATE_MMX2 0
00054 #define RENAME(a) a ## _MMX
00055 #include "yuv2rgb_template.c"
00056 #endif /* HAVE_MMX */
00057 
00058 //MMX2 versions
00059 #if HAVE_MMX2
00060 #undef RENAME
00061 #undef COMPILE_TEMPLATE_MMX2
00062 #define COMPILE_TEMPLATE_MMX2 1
00063 #define RENAME(a) a ## _MMX2
00064 #include "yuv2rgb_template.c"
00065 #endif /* HAVE_MMX2 */
00066 
00067 SwsFunc ff_yuv2rgb_init_mmx(SwsContext *c)
00068 {
00069     int cpu_flags = av_get_cpu_flags();
00070 
00071     if (c->srcFormat != PIX_FMT_YUV420P &&
00072         c->srcFormat != PIX_FMT_YUVA420P)
00073         return NULL;
00074 
00075 #if HAVE_MMX2
00076     if (cpu_flags & AV_CPU_FLAG_MMX2) {
00077         switch (c->dstFormat) {
00078         case PIX_FMT_RGB24:  return yuv420_rgb24_MMX2;
00079         case PIX_FMT_BGR24:  return yuv420_bgr24_MMX2;
00080         }
00081     }
00082 #endif
00083 
00084     if (cpu_flags & AV_CPU_FLAG_MMX) {
00085         switch (c->dstFormat) {
00086             case PIX_FMT_RGB32:
00087                 if (c->srcFormat == PIX_FMT_YUVA420P) {
00088 #if HAVE_7REGS && CONFIG_SWSCALE_ALPHA
00089                     return yuva420_rgb32_MMX;
00090 #endif
00091                     break;
00092                 } else return yuv420_rgb32_MMX;
00093             case PIX_FMT_BGR32:
00094                 if (c->srcFormat == PIX_FMT_YUVA420P) {
00095 #if HAVE_7REGS && CONFIG_SWSCALE_ALPHA
00096                     return yuva420_bgr32_MMX;
00097 #endif
00098                     break;
00099                 } else return yuv420_bgr32_MMX;
00100             case PIX_FMT_RGB24:  return yuv420_rgb24_MMX;
00101             case PIX_FMT_BGR24:  return yuv420_bgr24_MMX;
00102             case PIX_FMT_RGB565: return yuv420_rgb16_MMX;
00103             case PIX_FMT_RGB555: return yuv420_rgb15_MMX;
00104         }
00105     }
00106 
00107     return NULL;
00108 }

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