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 it
  10  * under the terms of the GNU Lesser General Public License as published by
  11  * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public License
  20  * along with this program; if not, write to the Free Software Foundation,
  21  * 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 <assert.h>
  29
  30 #include <vlc_common.h>
  31 #include <libvlc.h>
  32 #include <vlc_filter.h>
  33 #include <vlc_modules.h>
  34 #include "../misc/variables.h"
  35
  36 /* */
  37
  38 static int TriggerFilterCallback(vlc_object_t *p_this, char const *psz_var,
  39                                  vlc_value_t oldval, vlc_value_t newval,
  40                                  void *p_data)
  41 {
  42     (void) p_this; (void) oldval;
  43     var_Set((filter_t *)p_data, psz_var, newval);
  44     return 0;
  45 }
  46
  47 #undef filter_AddProxyCallbacks
  48 void filter_AddProxyCallbacks( vlc_object_t *obj, filter_t *filter,
  49                                vlc_callback_t restart_cb )
  50 {
  51     char **names = var_GetAllNames(VLC_OBJECT(filter));
  52     if (names == NULL)
  53         return;
  54
  55     for (char **pname = names; *pname != NULL; pname++)
  56     {
  57         char *name = *pname;
  58         int var_type = var_Type(filter, name);
  59         if (var_Type(obj, name))
  60         {
  61             free(name);
  62             continue;
  63         }
  64         var_Create(obj, name,
  65                    var_type | VLC_VAR_DOINHERIT | VLC_VAR_ISCOMMAND);
  66         if ((var_type & VLC_VAR_ISCOMMAND))
  67             var_AddCallback(obj, name, TriggerFilterCallback, filter);
  68         else
  69             var_AddCallback(obj, name, restart_cb, obj);
  70         free(name);
  71     }
  72     free(names);
  73 }
  74
  75 #undef filter_DelProxyCallbacks
  76 void filter_DelProxyCallbacks( vlc_object_t *obj, filter_t *filter,
  77                                vlc_callback_t restart_cb )
  78 {
  79     char **names = var_GetAllNames(VLC_OBJECT(filter));
  80     if (names == NULL)
  81         return;
  82
  83     for (char **pname = names; *pname != NULL; pname++)
  84     {
  85         char *name = *pname;
  86         if (!(var_Type(obj, name) & VLC_VAR_ISCOMMAND))
  87         {
  88             free(name);
  89             continue;
  90         }
  91         int filter_var_type = var_Type(filter, name);
  92
  93         if (filter_var_type & VLC_VAR_ISCOMMAND)
  94             var_DelCallback(obj, name, TriggerFilterCallback, filter);
  95         else if (filter_var_type)
  96             var_DelCallback(obj, name, restart_cb, obj);
  97         var_Destroy(obj, name);
  98         free(name);
  99     }
 100     free(names);
 101 }
 102
 103 /* */
 104
 105 filter_t *filter_NewBlend( vlc_object_t *p_this,
 106                            const video_format_t *p_dst_chroma )
 107 {
 108     filter_t *p_blend = vlc_custom_create( p_this, sizeof(*p_blend), "blend" );
 109     if( !p_blend )
 110         return NULL;
 111
 112     es_format_Init( &p_blend->fmt_in, VIDEO_ES, 0 );
 113
 114     es_format_Init( &p_blend->fmt_out, VIDEO_ES, 0 );
 115
 116     p_blend->fmt_out.i_codec        =
 117     p_blend->fmt_out.video.i_chroma = p_dst_chroma->i_chroma;
 118     p_blend->fmt_out.video.i_rmask  = p_dst_chroma->i_rmask;
 119     p_blend->fmt_out.video.i_gmask  = p_dst_chroma->i_gmask;
 120     p_blend->fmt_out.video.i_bmask  = p_dst_chroma->i_bmask;
 121     p_blend->fmt_out.video.i_rrshift= p_dst_chroma->i_rrshift;
 122     p_blend->fmt_out.video.i_rgshift= p_dst_chroma->i_rgshift;
 123     p_blend->fmt_out.video.i_rbshift= p_dst_chroma->i_rbshift;
 124     p_blend->fmt_out.video.i_lrshift= p_dst_chroma->i_lrshift;
 125     p_blend->fmt_out.video.i_lgshift= p_dst_chroma->i_lgshift;
 126     p_blend->fmt_out.video.i_lbshift= p_dst_chroma->i_lbshift;
 127
 128     /* The blend module will be loaded when needed with the real
 129     * input format */
 130     p_blend->p_module = NULL;
 131
 132     return p_blend;
 133 }
 134
 135 int filter_ConfigureBlend( filter_t *p_blend,
 136                            int i_dst_width, int i_dst_height,
 137                            const video_format_t *p_src )
 138 {
 139     /* */
 140     if( p_blend->p_module &&
 141         p_blend->fmt_in.video.i_chroma != p_src->i_chroma )
 142     {
 143         /* The chroma is not the same, we need to reload the blend module */
 144         module_unneed( p_blend, p_blend->p_module );
 145         p_blend->p_module = NULL;
 146     }
 147
 148     /* */
 149
 150     p_blend->fmt_in.i_codec = p_src->i_chroma;
 151     p_blend->fmt_in.video   = *p_src;
 152
 153     /* */
 154     p_blend->fmt_out.video.i_width          =
 155     p_blend->fmt_out.video.i_visible_width  = i_dst_width;
 156     p_blend->fmt_out.video.i_height         =
 157     p_blend->fmt_out.video.i_visible_height = i_dst_height;
 158
 159     /* */
 160     if( !p_blend->p_module )
 161         p_blend->p_module = module_need( p_blend, "video blending", NULL, false );
 162     if( !p_blend->p_module )
 163         return VLC_EGENERIC;
 164     return VLC_SUCCESS;
 165 }
 166
 167 int filter_Blend( filter_t *p_blend,
 168                   picture_t *p_dst, int i_dst_x, int i_dst_y,
 169                   const picture_t *p_src, int i_alpha )
 170 {
 171     if( !p_blend->p_module )
 172         return VLC_EGENERIC;
 173
 174     p_blend->pf_video_blend( p_blend, p_dst, p_src, i_dst_x, i_dst_y, i_alpha );
 175     return VLC_SUCCESS;
 176 }
 177
 178 void filter_DeleteBlend( filter_t *p_blend )
 179 {
 180     if( p_blend->p_module )
 181         module_unneed( p_blend, p_blend->p_module );
 182
 183     vlc_object_release( p_blend );
 184 }
 185
 186 /* */
 187 #include <vlc_video_splitter.h>
 188
 189 video_splitter_t *video_splitter_New( vlc_object_t *p_this,
 190                                       const char *psz_name,
 191                                       const video_format_t *p_fmt )
 192 {
 193     video_splitter_t *p_splitter = vlc_custom_create( p_this,
 194                                        sizeof(*p_splitter), "video splitter" );
 195     if( !p_splitter )
 196         return NULL;
 197
 198     video_format_Copy( &p_splitter->fmt, p_fmt );
 199
 200     /* */
 201     p_splitter->p_module = module_need( p_splitter, "video splitter", psz_name, true );
 202     if( ! p_splitter->p_module )
 203     {
 204         video_splitter_Delete( p_splitter );
 205         return NULL;
 206     }
 207
 208     return p_splitter;
 209 }
 210
 211 void video_splitter_Delete( video_splitter_t *p_splitter )
 212 {
 213     if( p_splitter->p_module )
 214         module_unneed( p_splitter, p_splitter->p_module );
 215
 216     video_format_Clean( &p_splitter->fmt );
 217
 218     vlc_object_release( p_splitter );
 219 }
 220