git.sesse.net Git - vlc/blob - modules/video_filter/clone.c

   1 /*****************************************************************************
   2  * clone.c : Clone video plugin for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2002 VideoLAN
   5  * $Id: clone.c,v 1.4 2003/01/09 17:47:05 sam Exp $
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 #include <stdlib.h>                                      /* malloc(), free() */
  28 #include <string.h>
  29
  30 #include <vlc/vlc.h>
  31 #include <vlc/vout.h>
  32
  33 #include "filter_common.h"
  34
  35 /*****************************************************************************
  36  * Local prototypes
  37  *****************************************************************************/
  38 static int  Create    ( vlc_object_t * );
  39 static void Destroy   ( vlc_object_t * );
  40
  41 static int  Init      ( vout_thread_t * );
  42 static void End       ( vout_thread_t * );
  43 static void Render    ( vout_thread_t *, picture_t * );
  44
  45 static void RemoveAllVout  ( vout_thread_t *p_vout );
  46
  47 /*****************************************************************************
  48  * Module descriptor
  49  *****************************************************************************/
  50 #define COUNT_TEXT N_("Number of clones")
  51 #define COUNT_LONGTEXT N_("Select the number of video windows in which to "\
  52     "clone the video")
  53
  54 vlc_module_begin();
  55     add_category_hint( N_("Miscellaneous"), NULL );
  56     add_integer( "clone-count", 2, NULL, COUNT_TEXT, COUNT_LONGTEXT );
  57     set_description( _("image clone video module") );
  58     set_capability( "video filter", 0 );
  59     add_shortcut( "clone" );
  60     set_callbacks( Create, Destroy );
  61 vlc_module_end();
  62
  63 /*****************************************************************************
  64  * vout_sys_t: Clone video output method descriptor
  65  *****************************************************************************
  66  * This structure is part of the video output thread descriptor.
  67  * It describes the Clone specific properties of an output thread.
  68  *****************************************************************************/
  69 struct vout_sys_t
  70 {
  71     int    i_clones;
  72     vout_thread_t **pp_vout;
  73 };
  74
  75 /*****************************************************************************
  76  * Create: allocates Clone video thread output method
  77  *****************************************************************************
  78  * This function allocates and initializes a Clone vout method.
  79  *****************************************************************************/
  80 static int Create( vlc_object_t *p_this )
  81 {
  82     vout_thread_t *p_vout = (vout_thread_t *)p_this;
  83
  84     /* Allocate structure */
  85     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
  86     if( p_vout->p_sys == NULL )
  87     {
  88         msg_Err( p_vout, "out of memory" );
  89         return( 1 );
  90     }
  91
  92     p_vout->pf_init = Init;
  93     p_vout->pf_end = End;
  94     p_vout->pf_manage = NULL;
  95     p_vout->pf_render = Render;
  96     p_vout->pf_display = NULL;
  97
  98     /* Look what method was requested */
  99     p_vout->p_sys->i_clones = config_GetInt( p_vout, "clone-count" );
 100
 101     p_vout->p_sys->i_clones = __MAX( 1, __MIN( 99, p_vout->p_sys->i_clones ) );
 102
 103     msg_Dbg( p_vout, "spawning %i clone(s)", p_vout->p_sys->i_clones );
 104
 105     p_vout->p_sys->pp_vout = malloc( p_vout->p_sys->i_clones *
 106                                      sizeof(vout_thread_t *) );
 107     if( p_vout->p_sys->pp_vout == NULL )
 108     {
 109         msg_Err( p_vout, "out of memory" );
 110         free( p_vout->p_sys );
 111         return( 1 );
 112     }
 113
 114     return( 0 );
 115 }
 116
 117 /*****************************************************************************
 118  * Init: initialize Clone video thread output method
 119  *****************************************************************************/
 120 static int Init( vout_thread_t *p_vout )
 121 {
 122     int   i_index, i_vout;
 123     picture_t *p_pic;
 124
 125     I_OUTPUTPICTURES = 0;
 126
 127     /* Initialize the output structure */
 128     p_vout->output.i_chroma = p_vout->render.i_chroma;
 129     p_vout->output.i_width  = p_vout->render.i_width;
 130     p_vout->output.i_height = p_vout->render.i_height;
 131     p_vout->output.i_aspect = p_vout->render.i_aspect;
 132
 133     /* Try to open the real video output */
 134     msg_Dbg( p_vout, "spawning the real video outputs" );
 135
 136     for( i_vout = 0; i_vout < p_vout->p_sys->i_clones; i_vout++ )
 137     {
 138         p_vout->p_sys->pp_vout[ i_vout ] = vout_Create( p_vout,
 139                             p_vout->render.i_width, p_vout->render.i_height,
 140                             p_vout->render.i_chroma, p_vout->render.i_aspect );
 141         if( p_vout->p_sys->pp_vout[ i_vout ] == NULL )
 142         {
 143             msg_Err( p_vout, "failed to clone %i vout threads",
 144                              p_vout->p_sys->i_clones );
 145             p_vout->p_sys->i_clones = i_vout;
 146             RemoveAllVout( p_vout );
 147             return 0;
 148         }
 149     }
 150
 151     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 152
 153     return( 0 );
 154 }
 155
 156 /*****************************************************************************
 157  * End: terminate Clone video thread output method
 158  *****************************************************************************/
 159 static void End( vout_thread_t *p_vout )
 160 {
 161     int i_index;
 162
 163     /* Free the fake output buffers we allocated */
 164     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 165     {
 166         i_index--;
 167         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 168     }
 169 }
 170
 171 /*****************************************************************************
 172  * Destroy: destroy Clone video thread output method
 173  *****************************************************************************
 174  * Terminate an output method created by CloneCreateOutputMethod
 175  *****************************************************************************/
 176 static void Destroy( vlc_object_t *p_this )
 177 {
 178     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 179
 180     RemoveAllVout( p_vout );
 181
 182     free( p_vout->p_sys->pp_vout );
 183     free( p_vout->p_sys );
 184 }
 185
 186 /*****************************************************************************
 187  * Render: displays previously rendered output
 188  *****************************************************************************
 189  * This function send the currently rendered image to Clone image, waits
 190  * until it is displayed and switch the two rendering buffers, preparing next
 191  * frame.
 192  *****************************************************************************/
 193 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 194 {
 195     picture_t *p_outpic = NULL;
 196     int i_vout, i_plane;
 197
 198     for( i_vout = 0; i_vout < p_vout->p_sys->i_clones; i_vout++ )
 199     {
 200         while( ( p_outpic =
 201             vout_CreatePicture( p_vout->p_sys->pp_vout[ i_vout ], 0, 0, 0 )
 202                ) == NULL )
 203         {
 204             if( p_vout->b_die || p_vout->b_error )
 205             {
 206                 vout_DestroyPicture(
 207                     p_vout->p_sys->pp_vout[ i_vout ], p_outpic );
 208                 return;
 209             }
 210
 211             msleep( VOUT_OUTMEM_SLEEP );
 212         }
 213
 214         vout_DatePicture( p_vout->p_sys->pp_vout[ i_vout ],
 215                           p_outpic, p_pic->date );
 216         vout_LinkPicture( p_vout->p_sys->pp_vout[ i_vout ], p_outpic );
 217
 218         for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 219         {
 220             uint8_t *p_in, *p_in_end, *p_out;
 221             int i_in_pitch = p_pic->p[i_plane].i_pitch;
 222             const int i_out_pitch = p_outpic->p[i_plane].i_pitch;
 223             const int i_copy_pitch = p_outpic->p[i_plane].i_visible_pitch;
 224
 225             p_in = p_pic->p[i_plane].p_pixels;
 226             p_out = p_outpic->p[i_plane].p_pixels;
 227
 228             if( i_in_pitch == i_copy_pitch
 229                  && i_out_pitch == i_copy_pitch )
 230             {
 231                 p_vout->p_vlc->pf_memcpy( p_out, p_in, i_in_pitch
 232                                            * p_outpic->p[i_plane].i_lines );
 233             }
 234             else
 235             {
 236                 p_in_end = p_in + i_in_pitch * p_outpic->p[i_plane].i_lines;
 237
 238                 while( p_in < p_in_end )
 239                 {
 240                     p_vout->p_vlc->pf_memcpy( p_out, p_in, i_copy_pitch );
 241                     p_in += i_in_pitch;
 242                     p_out += i_out_pitch;
 243                 }
 244             }
 245         }
 246
 247         vout_UnlinkPicture( p_vout->p_sys->pp_vout[ i_vout ], p_outpic );
 248         vout_DisplayPicture( p_vout->p_sys->pp_vout[ i_vout ], p_outpic );
 249     }
 250 }
 251
 252 /*****************************************************************************
 253  * RemoveAllVout: destroy all the child video output threads
 254  *****************************************************************************/
 255 static void RemoveAllVout( vout_thread_t *p_vout )
 256 {
 257     while( p_vout->p_sys->i_clones )
 258     {
 259          --p_vout->p_sys->i_clones;
 260          vout_Destroy( p_vout->p_sys->pp_vout[p_vout->p_sys->i_clones] );
 261     }
 262 }
 263