1 /*****************************************************************************
2 * yuvp.c: YUVP to YUVA/RGBA chroma converter
3 *****************************************************************************
4 * Copyright (C) 2008 the VideoLAN team
7 * Authors: Laurent Aimar < fenrir @ videolan.org >
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.
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.
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 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
31 #include <vlc_common.h>
32 #include <vlc_plugin.h>
33 #include <vlc_filter.h>
37 * Add anti-aliasing support (specially for DVD where only 4 colors are used)
40 /*****************************************************************************
42 *****************************************************************************/
43 static int Open ( vlc_object_t
* );
44 static void Close( vlc_object_t
* );
47 set_description( N_("YUVP converter") )
48 set_capability( "video filter2", 10 )
49 set_callbacks( Open
, Close
)
52 /****************************************************************************
54 ****************************************************************************/
55 static picture_t
*Filter( filter_t
*, picture_t
* );
56 static void Yuv2Rgb( uint8_t *r
, uint8_t *g
, uint8_t *b
, int y1
, int u1
, int v1
);
58 /*****************************************************************************
59 * Open: probe the filter and return score
60 *****************************************************************************/
61 static int Open( vlc_object_t
*p_this
)
63 filter_t
*p_filter
= (filter_t
*)p_this
;
65 /* It only supports YUVP to YUVA/RGBA without scaling
66 * (if scaling is required another filter can do it) */
67 if( p_filter
->fmt_in
.video
.i_chroma
!= VLC_CODEC_YUVP
||
68 ( p_filter
->fmt_out
.video
.i_chroma
!= VLC_CODEC_YUVA
&&
69 p_filter
->fmt_out
.video
.i_chroma
!= VLC_CODEC_RGBA
) ||
70 p_filter
->fmt_in
.video
.i_width
!= p_filter
->fmt_out
.video
.i_width
||
71 p_filter
->fmt_in
.video
.i_height
!= p_filter
->fmt_out
.video
.i_height
)
76 p_filter
->pf_video_filter
= Filter
;
78 msg_Dbg( p_filter
, "YUVP to %4.4s converter",
79 (const char*)&p_filter
->fmt_out
.video
.i_chroma
);
84 /*****************************************************************************
85 * Close: clean up the filter
86 *****************************************************************************/
87 static void Close( vlc_object_t
*p_this
)
92 /****************************************************************************
93 * Filter: the whole thing
94 ****************************************************************************/
95 static picture_t
*Filter( filter_t
*p_filter
, picture_t
*p_pic
)
102 const video_palette_t
*p_yuvp
= p_filter
->fmt_in
.video
.p_palette
;
104 assert( p_yuvp
!= NULL
);
105 assert( p_filter
->fmt_in
.video
.i_chroma
== VLC_CODEC_YUVP
);
106 assert( p_filter
->fmt_in
.video
.i_width
== p_filter
->fmt_out
.video
.i_width
);
107 assert( p_filter
->fmt_in
.video
.i_height
== p_filter
->fmt_out
.video
.i_height
);
109 /* Request output picture */
110 p_out
= filter_NewPicture( p_filter
);
113 picture_Release( p_pic
);
117 if( p_filter
->fmt_out
.video
.i_chroma
== VLC_CODEC_YUVA
)
119 for( unsigned int y
= 0; y
< p_filter
->fmt_in
.video
.i_height
; y
++ )
121 const uint8_t *p_line
= &p_pic
->p
->p_pixels
[y
*p_pic
->p
->i_pitch
];
122 uint8_t *p_y
= &p_out
->Y_PIXELS
[y
*p_out
->Y_PITCH
];
123 uint8_t *p_u
= &p_out
->U_PIXELS
[y
*p_out
->U_PITCH
];
124 uint8_t *p_v
= &p_out
->V_PIXELS
[y
*p_out
->V_PITCH
];
125 uint8_t *p_a
= &p_out
->A_PIXELS
[y
*p_out
->A_PITCH
];
127 for( unsigned int x
= 0; x
< p_filter
->fmt_in
.video
.i_width
; x
++ )
129 const int v
= p_line
[x
];
131 if( v
> p_yuvp
->i_entries
) /* maybe assert ? */
134 p_y
[x
] = p_yuvp
->palette
[v
][0];
135 p_u
[x
] = p_yuvp
->palette
[v
][1];
136 p_v
[x
] = p_yuvp
->palette
[v
][2];
137 p_a
[x
] = p_yuvp
->palette
[v
][3];
143 assert( p_filter
->fmt_out
.video
.i_chroma
== VLC_CODEC_RGBA
);
145 /* Create a RGBA palette */
146 video_palette_t rgbp
;
147 rgbp
.i_entries
= p_yuvp
->i_entries
;
148 for( int i
= 0; i
< p_yuvp
->i_entries
; i
++ )
150 Yuv2Rgb( &rgbp
.palette
[i
][0], &rgbp
.palette
[i
][1], &rgbp
.palette
[i
][2],
151 p_yuvp
->palette
[i
][0], p_yuvp
->palette
[i
][1], p_yuvp
->palette
[i
][2] );
152 rgbp
.palette
[i
][3] = p_yuvp
->palette
[i
][3];
156 for( unsigned int y
= 0; y
< p_filter
->fmt_in
.video
.i_height
; y
++ )
158 const uint8_t *p_line
= &p_pic
->p
->p_pixels
[y
*p_pic
->p
->i_pitch
];
159 uint8_t *p_rgba
= &p_out
->p
->p_pixels
[y
*p_out
->p
->i_pitch
];
161 for( unsigned int x
= 0; x
< p_filter
->fmt_in
.video
.i_width
; x
++ )
163 const int v
= p_line
[x
];
165 if( v
> rgbp
.i_entries
) /* maybe assert ? */
168 p_rgba
[4*x
+0] = rgbp
.palette
[v
][0];
169 p_rgba
[4*x
+1] = rgbp
.palette
[v
][1];
170 p_rgba
[4*x
+2] = rgbp
.palette
[v
][2];
171 p_rgba
[4*x
+3] = rgbp
.palette
[v
][3];
176 picture_CopyProperties( p_out
, p_pic
);
177 picture_Release( p_pic
);
181 /* FIXME copied from blend.c */
182 static inline uint8_t vlc_uint8( int v
)
190 static void Yuv2Rgb( uint8_t *r
, uint8_t *g
, uint8_t *b
, int y1
, int u1
, int v1
)
192 /* macros used for YUV pixel conversions */
193 # define SCALEBITS 10
194 # define ONE_HALF (1 << (SCALEBITS - 1))
195 # define FIX(x) ((int) ((x) * (1<<SCALEBITS) + 0.5))
197 int y
, cb
, cr
, r_add
, g_add
, b_add
;
201 r_add
= FIX(1.40200*255.0/224.0) * cr
+ ONE_HALF
;
202 g_add
= - FIX(0.34414*255.0/224.0) * cb
203 - FIX(0.71414*255.0/224.0) * cr
+ ONE_HALF
;
204 b_add
= FIX(1.77200*255.0/224.0) * cb
+ ONE_HALF
;
205 y
= (y1
- 16) * FIX(255.0/219.0);
206 *r
= vlc_uint8( (y
+ r_add
) >> SCALEBITS
);
207 *g
= vlc_uint8( (y
+ g_add
) >> SCALEBITS
);
208 *b
= vlc_uint8( (y
+ b_add
) >> SCALEBITS
);