4efc6a6420f3f3ca676b26b940bca9ccc3baacfd
[vlc.git] / modules / video_chroma / i420_ymga.c
1 /*****************************************************************************
2  * i420_ymga.c : YUV to YUV conversion module for vlc
3  *****************************************************************************
4  * Copyright (C) 2000, 2001 the VideoLAN team
5  * $Id$
6  *
7  * Authors: Samuel Hocevar <sam@zoy.org>
8  *
9  * This program is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22  *****************************************************************************/
23
24 /*****************************************************************************
25  * Preamble
26  *****************************************************************************/
27
28 #ifdef HAVE_CONFIG_H
29 # include "config.h"
30 #endif
31
32 #include <errno.h>                                                 /* ENOMEM */
33
34 #include <vlc_common.h>
35 #include <vlc_plugin.h>
36 #include <vlc_filter.h>
37 #include <vlc_vout.h>
38
39 #define SRC_FOURCC  "I420,IYUV,YV12"
40 #define DEST_FOURCC "YMGA"
41
42 /*****************************************************************************
43  * Local and extern prototypes.
44  *****************************************************************************/
45 static int  Activate   ( vlc_object_t * );
46 static void I420_YMGA  ( filter_t *, picture_t *, picture_t * );
47 static picture_t *I420_YMGA_Filter( filter_t *, picture_t * );
48
49 /*****************************************************************************
50  * Module descriptor
51  *****************************************************************************/
52 vlc_module_begin();
53 #if defined (MODULE_NAME_IS_i420_ymga)
54     set_description( N_("Conversions from " SRC_FOURCC " to " DEST_FOURCC) );
55     set_capability( "video filter2", 80 );
56 #elif defined (MODULE_NAME_IS_i420_ymga_mmx)
57     set_description( N_("MMX conversions from " SRC_FOURCC " to " DEST_FOURCC) );
58     set_capability( "video filter2", 100 );
59     add_requirement( MMX );
60 #endif
61     set_callbacks( Activate, NULL );
62 vlc_module_end();
63
64 /*****************************************************************************
65  * Activate: allocate a chroma function
66  *****************************************************************************
67  * This function allocates and initializes a chroma function
68  *****************************************************************************/
69 static int Activate( vlc_object_t *p_this )
70 {
71     filter_t *p_filter = (filter_t *)p_this;
72
73     if( p_filter->fmt_in.video.i_width & 1
74      || p_filter->fmt_in.video.i_height & 1 )
75     {
76         return -1;
77     }
78
79     switch( p_filter->fmt_in.video.i_chroma )
80     {
81         case VLC_FOURCC('Y','V','1','2'):
82         case VLC_FOURCC('I','4','2','0'):
83         case VLC_FOURCC('I','Y','U','V'):
84             switch( p_filter->fmt_out.video.i_chroma )
85             {
86                 case VLC_FOURCC('Y','M','G','A'):
87                     p_filter->pf_video_filter = I420_YMGA_Filter;
88                     break;
89
90                 default:
91                     return -1;
92             }
93             break;
94
95         default:
96             return -1;
97     }
98
99     return 0;
100 }
101
102 /* Following functions are local */
103
104 VIDEO_FILTER_WRAPPER( I420_YMGA )
105
106 /*****************************************************************************
107  * I420_YMGA: planar YUV 4:2:0 to Matrox's planar/packed YUV 4:2:0
108  *****************************************************************************/
109 static void I420_YMGA( filter_t *p_filter, picture_t *p_source,
110                                            picture_t *p_dest )
111 {
112     uint8_t *p_uv = p_dest->U_PIXELS;
113     uint8_t *p_u = p_source->U_PIXELS;
114     uint8_t *p_v = p_source->V_PIXELS;
115
116     int i_x;
117
118     /* Copy the Y part */
119     vlc_memcpy( p_dest->Y_PIXELS, p_source->Y_PIXELS,
120                 p_dest->p[Y_PLANE].i_pitch * p_dest->p[Y_PLANE].i_visible_lines );
121
122     /* Copy the U:V part */
123     for( i_x = p_dest->p[U_PLANE].i_pitch * p_dest->p[U_PLANE].i_visible_lines / 64;
124          i_x--; )
125     {
126 #if defined (MODULE_NAME_IS_i420_ymga)
127         *p_uv++ = *p_u++; *p_uv++ = *p_v++; *p_uv++ = *p_u++; *p_uv++ = *p_v++;
128         *p_uv++ = *p_u++; *p_uv++ = *p_v++; *p_uv++ = *p_u++; *p_uv++ = *p_v++;
129         *p_uv++ = *p_u++; *p_uv++ = *p_v++; *p_uv++ = *p_u++; *p_uv++ = *p_v++;
130         *p_uv++ = *p_u++; *p_uv++ = *p_v++; *p_uv++ = *p_u++; *p_uv++ = *p_v++;
131         *p_uv++ = *p_u++; *p_uv++ = *p_v++; *p_uv++ = *p_u++; *p_uv++ = *p_v++;
132         *p_uv++ = *p_u++; *p_uv++ = *p_v++; *p_uv++ = *p_u++; *p_uv++ = *p_v++;
133         *p_uv++ = *p_u++; *p_uv++ = *p_v++; *p_uv++ = *p_u++; *p_uv++ = *p_v++;
134         *p_uv++ = *p_u++; *p_uv++ = *p_v++; *p_uv++ = *p_u++; *p_uv++ = *p_v++;
135 #else
136         __asm__( ".p2align 5 \n\
137         movd       (%0), %%mm0  # Load 4 Cr   00 00 00 00 v3 v2 v1 v0     \n\
138         movd      4(%0), %%mm2  # Load 4 Cr   00 00 00 00 v3 v2 v1 v0     \n\
139         movd      8(%0), %%mm4  # Load 4 Cr   00 00 00 00 v3 v2 v1 v0     \n\
140         movd     12(%0), %%mm6  # Load 4 Cr   00 00 00 00 v3 v2 v1 v0     \n\
141         movd       (%1), %%mm1  # Load 4 Cb   00 00 00 00 u3 u2 u1 u0     \n\
142         movd      4(%1), %%mm3  # Load 4 Cb   00 00 00 00 u3 u2 u1 u0     \n\
143         movd      8(%1), %%mm5  # Load 4 Cb   00 00 00 00 u3 u2 u1 u0     \n\
144         movd     12(%1), %%mm7  # Load 4 Cb   00 00 00 00 u3 u2 u1 u0     \n\
145         punpcklbw %%mm1, %%mm0  #             u3 v3 u2 v2 u1 v1 u0 v0     \n\
146         punpcklbw %%mm3, %%mm2  #             u3 v3 u2 v2 u1 v1 u0 v0     \n\
147         punpcklbw %%mm5, %%mm4  #             u3 v3 u2 v2 u1 v1 u0 v0     \n\
148         punpcklbw %%mm7, %%mm6  #             u3 v3 u2 v2 u1 v1 u0 v0     \n\
149         movq      %%mm0, (%2)   # Store CrCb                              \n\
150         movq      %%mm2, 8(%2)  # Store CrCb                              \n\
151         movq      %%mm4, 16(%2) # Store CrCb                              \n\
152         movq      %%mm6, 24(%2) # Store CrCb"
153         : : "r" (p_v), "r" (p_u), "r" (p_uv) );
154
155         p_v += 16; p_u += 16; p_uv += 32;
156 #endif
157     }
158 }
159