1 /*****************************************************************************
2 * video_yuv.c: YUV transformation functions
3 * These functions set up YUV tables for colorspace conversion
4 *****************************************************************************
5 * Copyright (C) 1999, 2000 VideoLAN
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 GNU
17 * General Public License for more details.
19 * You should have received a copy of the GNU General Public
20 * License along with this program; if not, write to the
21 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 * Boston, MA 02111-1307, USA.
23 *****************************************************************************/
25 /*****************************************************************************
27 *****************************************************************************/
30 #include <math.h> /* exp(), pow() */
31 #include <errno.h> /* ENOMEM */
32 #include <stdlib.h> /* free() */
33 #include <string.h> /* strerror() */
42 #include "video_output.h"
43 #include "video_yuv.h"
49 /*****************************************************************************
50 * vout_InitYUV: allocate and initialize translation tables
51 *****************************************************************************
52 * This function will allocate memory to store translation tables, depending
53 * on the screen depth.
54 *****************************************************************************/
55 int vout_InitYUV( vout_thread_t *p_vout )
57 /* Choose the best module */
58 p_vout->yuv.p_module = module_Need( p_main->p_bank,
59 MODULE_CAPABILITY_YUV, NULL );
61 if( p_vout->yuv.p_module == NULL )
63 intf_ErrMsg( "vout error: no suitable yuv module" );
67 #define yuv_functions p_vout->yuv.p_module->p_functions->yuv.functions.yuv
68 p_vout->yuv.pf_init = yuv_functions.pf_init;
69 p_vout->yuv.pf_reset = yuv_functions.pf_reset;
70 p_vout->yuv.pf_end = yuv_functions.pf_end;
73 return( p_vout->yuv.pf_init( p_vout ) );
76 /*****************************************************************************
77 * vout_ResetYUV: re-initialize translation tables
78 *****************************************************************************
79 * This function will initialize the tables allocated by vout_InitYUV and
80 * set functions pointers.
81 *****************************************************************************/
82 int vout_ResetYUV( vout_thread_t *p_vout )
84 p_vout->yuv.pf_end( p_vout );
85 return( p_vout->yuv.pf_init( p_vout ) );
88 /*****************************************************************************
89 * vout_EndYUV: destroy translation tables
90 *****************************************************************************
91 * Free memory allocated by vout_InitYUV
92 *****************************************************************************/
93 void vout_EndYUV( vout_thread_t *p_vout )
95 p_vout->yuv.pf_end( p_vout );
96 module_Unneed( p_main->p_bank, p_vout->yuv.p_module );