src/misc/filter.c

   1 /*****************************************************************************
   2  * filter.c : filter_t helpers.
   3  *****************************************************************************
   4  * Copyright (C) 2009 Laurent Aimar
   5  * $Id$
   6  *
   7  * Author: Laurent Aimar <fenrir _AT_ videolan _DOT_ 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 #ifdef HAVE_CONFIG_H
  25 # include "config.h"
  26 #endif
  27
  28 #include <vlc_common.h>
  29 #include <libvlc.h>
  30 #include <vlc_filter.h>
  31
  32 filter_t *filter_NewBlend( vlc_object_t *p_this,
  33                            const video_format_t *p_dst_chroma )
  34 {
  35     filter_t *p_blend = vlc_custom_create( p_this, sizeof(*p_blend),
  36                                            VLC_OBJECT_GENERIC, "blend" );
  37     if( !p_blend )
  38         return NULL;
  39
  40     es_format_Init( &p_blend->fmt_in, VIDEO_ES, 0 );
  41
  42     es_format_Init( &p_blend->fmt_out, VIDEO_ES, 0 );
  43
  44     p_blend->fmt_out.i_codec        =
  45     p_blend->fmt_out.video.i_chroma = p_dst_chroma->i_chroma;
  46     p_blend->fmt_out.video.i_rmask  = p_dst_chroma->i_rmask;
  47     p_blend->fmt_out.video.i_gmask  = p_dst_chroma->i_gmask;
  48     p_blend->fmt_out.video.i_bmask  = p_dst_chroma->i_bmask;
  49     p_blend->fmt_out.video.i_rrshift= p_dst_chroma->i_rrshift;
  50     p_blend->fmt_out.video.i_rgshift= p_dst_chroma->i_rgshift;
  51     p_blend->fmt_out.video.i_rbshift= p_dst_chroma->i_rbshift;
  52     p_blend->fmt_out.video.i_lrshift= p_dst_chroma->i_lrshift;
  53     p_blend->fmt_out.video.i_lgshift= p_dst_chroma->i_lgshift;
  54     p_blend->fmt_out.video.i_lbshift= p_dst_chroma->i_lbshift;
  55
  56     /* The blend module will be loaded when needed with the real
  57     * input format */
  58     p_blend->p_module = NULL;
  59
  60     /* */
  61     vlc_object_attach( p_blend, p_this );
  62
  63     return p_blend;
  64 }
  65
  66 int filter_ConfigureBlend( filter_t *p_blend,
  67                            int i_dst_width, int i_dst_height,
  68                            const video_format_t *p_src )
  69 {
  70     /* */
  71     if( p_blend->p_module &&
  72         p_blend->fmt_in.video.i_chroma != p_src->i_chroma )
  73     {
  74         /* The chroma is not the same, we need to reload the blend module */
  75         module_unneed( p_blend, p_blend->p_module );
  76         p_blend->p_module = NULL;
  77     }
  78
  79     /* */
  80
  81     p_blend->fmt_in.i_codec = p_src->i_chroma;
  82     p_blend->fmt_in.video   = *p_src;
  83
  84     /* */
  85     p_blend->fmt_out.video.i_width          =
  86     p_blend->fmt_out.video.i_visible_width  = i_dst_width;
  87     p_blend->fmt_out.video.i_height         =
  88     p_blend->fmt_out.video.i_visible_height = i_dst_height;
  89
  90     /* */
  91     if( !p_blend->p_module )
  92         p_blend->p_module = module_need( p_blend, "video blending", NULL, false );
  93     if( !p_blend->p_module )
  94         return VLC_EGENERIC;
  95     return VLC_SUCCESS;
  96 }
  97
  98 int filter_Blend( filter_t *p_blend,
  99                   picture_t *p_dst, int i_dst_x, int i_dst_y,
 100                   const picture_t *p_src, int i_alpha )
 101 {
 102     if( !p_blend->p_module )
 103         return VLC_EGENERIC;
 104
 105     p_blend->pf_video_blend( p_blend, p_dst, p_src, i_dst_x, i_dst_y, i_alpha );
 106     return VLC_SUCCESS;
 107 }
 108
 109 void filter_DeleteBlend( filter_t *p_blend )
 110 {
 111     if( p_blend->p_module )
 112         module_unneed( p_blend, p_blend->p_module );
 113
 114     vlc_object_release( p_blend );
 115 }
 116
 117 /* */
 118 #include <vlc_video_splitter.h>
 119
 120 video_splitter_t *video_splitter_New( vlc_object_t *p_this,
 121                                       const char *psz_name,
 122                                       const video_format_t *p_fmt )
 123 {
 124     video_splitter_t *p_splitter = vlc_custom_create( p_this, sizeof(*p_splitter),
 125                                            VLC_OBJECT_GENERIC, "video splitter" );
 126     if( !p_splitter )
 127         return NULL;
 128
 129     video_format_Copy( &p_splitter->fmt, p_fmt );
 130
 131     /* */
 132     vlc_object_attach( p_splitter, p_this );
 133
 134     p_splitter->p_module = module_need( p_splitter, "video splitter", psz_name, true );
 135     if( ! p_splitter->p_module )
 136     {
 137         video_splitter_Delete( p_splitter );
 138         return NULL;
 139     }
 140
 141     return p_splitter;
 142 }
 143
 144 void video_splitter_Delete( video_splitter_t *p_splitter )
 145 {
 146     if( p_splitter->p_module )
 147         module_unneed( p_splitter, p_splitter->p_module );
 148
 149     video_format_Clean( &p_splitter->fmt );
 150
 151     vlc_object_release( p_splitter );
 152 }
 153