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 );