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, 2003 VideoLAN
   5  * $Id: clone.c,v 1.5 2003/01/17 16:18:03 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 static int  SendEvents( vlc_object_t *, char const *,
  48                         vlc_value_t, vlc_value_t, void * );
  49
  50 /*****************************************************************************
  51  * Module descriptor
  52  *****************************************************************************/
  53 #define COUNT_TEXT N_("Number of clones")
  54 #define COUNT_LONGTEXT N_("Select the number of video windows in which to "\
  55     "clone the video")
  56
  57 vlc_module_begin();
  58     add_category_hint( N_("Miscellaneous"), NULL );
  59     add_integer( "clone-count", 2, NULL, COUNT_TEXT, COUNT_LONGTEXT );
  60     set_description( _("image clone video module") );
  61     set_capability( "video filter", 0 );
  62     add_shortcut( "clone" );
  63     set_callbacks( Create, Destroy );
  64 vlc_module_end();
  65
  66 /*****************************************************************************
  67  * vout_sys_t: Clone video output method descriptor
  68  *****************************************************************************
  69  * This structure is part of the video output thread descriptor.
  70  * It describes the Clone specific properties of an output thread.
  71  *****************************************************************************/
  72 struct vout_sys_t
  73 {
  74     int    i_clones;
  75     vout_thread_t **pp_vout;
  76 };
  77
  78 /*****************************************************************************
  79  * Create: allocates Clone video thread output method
  80  *****************************************************************************
  81  * This function allocates and initializes a Clone vout method.
  82  *****************************************************************************/
  83 static int Create( vlc_object_t *p_this )
  84 {
  85     vout_thread_t *p_vout = (vout_thread_t *)p_this;
  86
  87     /* Allocate structure */
  88     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
  89     if( p_vout->p_sys == NULL )
  90     {
  91         msg_Err( p_vout, "out of memory" );
  92         return VLC_ENOMEM;
  93     }
  94
  95     p_vout->pf_init = Init;
  96     p_vout->pf_end = End;
  97     p_vout->pf_manage = NULL;
  98     p_vout->pf_render = Render;
  99     p_vout->pf_display = NULL;
 100
 101     /* Look what method was requested */
 102     p_vout->p_sys->i_clones = config_GetInt( p_vout, "clone-count" );
 103
 104     p_vout->p_sys->i_clones = __MAX( 1, __MIN( 99, p_vout->p_sys->i_clones ) );
 105
 106     msg_Dbg( p_vout, "spawning %i clone(s)", p_vout->p_sys->i_clones );
 107
 108     p_vout->p_sys->pp_vout = malloc( p_vout->p_sys->i_clones *
 109                                      sizeof(vout_thread_t *) );
 110     if( p_vout->p_sys->pp_vout == NULL )
 111     {
 112         msg_Err( p_vout, "out of memory" );
 113         free( p_vout->p_sys );
 114         return VLC_ENOMEM;
 115     }
 116
 117     return VLC_SUCCESS;
 118 }
 119
 120 /*****************************************************************************
 121  * Init: initialize Clone video thread output method
 122  *****************************************************************************/
 123 static int Init( vout_thread_t *p_vout )
 124 {
 125     int   i_index, i_vout;
 126     picture_t *p_pic;
 127
 128     I_OUTPUTPICTURES = 0;
 129
 130     /* Initialize the output structure */
 131     p_vout->output.i_chroma = p_vout->render.i_chroma;
 132     p_vout->output.i_width  = p_vout->render.i_width;
 133     p_vout->output.i_height = p_vout->render.i_height;
 134     p_vout->output.i_aspect = p_vout->render.i_aspect;
 135
 136     /* Try to open the real video output */
 137     msg_Dbg( p_vout, "spawning the real video outputs" );
 138
 139     for( i_vout = 0; i_vout < p_vout->p_sys->i_clones; i_vout++ )
 140     {
 141         p_vout->p_sys->pp_vout[ i_vout ] = vout_Create( p_vout,
 142                             p_vout->render.i_width, p_vout->render.i_height,
 143                             p_vout->render.i_chroma, p_vout->render.i_aspect );
 144         if( p_vout->p_sys->pp_vout[ i_vout ] == NULL )
 145         {
 146             msg_Err( p_vout, "failed to clone %i vout threads",
 147                              p_vout->p_sys->i_clones );
 148             p_vout->p_sys->i_clones = i_vout;
 149             RemoveAllVout( p_vout );
 150             return VLC_EGENERIC;
 151         }
 152         ADD_CALLBACKS( p_vout->p_sys->pp_vout[ i_vout ], SendEvents );
 153     }
 154
 155     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 156
 157     return VLC_SUCCESS;
 158 }
 159
 160 /*****************************************************************************
 161  * End: terminate Clone video thread output method
 162  *****************************************************************************/
 163 static void End( vout_thread_t *p_vout )
 164 {
 165     int i_index;
 166
 167     /* Free the fake output buffers we allocated */
 168     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 169     {
 170         i_index--;
 171         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 172     }
 173 }
 174
 175 /*****************************************************************************
 176  * Destroy: destroy Clone video thread output method
 177  *****************************************************************************
 178  * Terminate an output method created by CloneCreateOutputMethod
 179  *****************************************************************************/
 180 static void Destroy( vlc_object_t *p_this )
 181 {
 182     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 183
 184     RemoveAllVout( p_vout );
 185
 186     free( p_vout->p_sys->pp_vout );
 187     free( p_vout->p_sys );
 188 }
 189
 190 /*****************************************************************************
 191  * Render: displays previously rendered output
 192  *****************************************************************************
 193  * This function send the currently rendered image to Clone image, waits
 194  * until it is displayed and switch the two rendering buffers, preparing next
 195  * frame.
 196  *****************************************************************************/
 197 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 198 {
 199     picture_t *p_outpic = NULL;
 200     int i_vout, i_plane;
 201
 202     for( i_vout = 0; i_vout < p_vout->p_sys->i_clones; i_vout++ )
 203     {
 204         while( ( p_outpic =
 205             vout_CreatePicture( p_vout->p_sys->pp_vout[ i_vout ], 0, 0, 0 )
 206                ) == NULL )
 207         {
 208             if( p_vout->b_die || p_vout->b_error )
 209             {
 210                 vout_DestroyPicture(
 211                     p_vout->p_sys->pp_vout[ i_vout ], p_outpic );
 212                 return;
 213             }
 214
 215             msleep( VOUT_OUTMEM_SLEEP );
 216         }
 217
 218         vout_DatePicture( p_vout->p_sys->pp_vout[ i_vout ],
 219                           p_outpic, p_pic->date );
 220         vout_LinkPicture( p_vout->p_sys->pp_vout[ i_vout ], p_outpic );
 221
 222         for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 223         {
 224             uint8_t *p_in, *p_in_end, *p_out;
 225             int i_in_pitch = p_pic->p[i_plane].i_pitch;
 226             const int i_out_pitch = p_outpic->p[i_plane].i_pitch;
 227             const int i_copy_pitch = p_outpic->p[i_plane].i_visible_pitch;
 228
 229             p_in = p_pic->p[i_plane].p_pixels;
 230             p_out = p_outpic->p[i_plane].p_pixels;
 231
 232             if( i_in_pitch == i_copy_pitch
 233                  && i_out_pitch == i_copy_pitch )
 234             {
 235                 p_vout->p_vlc->pf_memcpy( p_out, p_in, i_in_pitch
 236                                            * p_outpic->p[i_plane].i_lines );
 237             }
 238             else
 239             {
 240                 p_in_end = p_in + i_in_pitch * p_outpic->p[i_plane].i_lines;
 241
 242                 while( p_in < p_in_end )
 243                 {
 244                     p_vout->p_vlc->pf_memcpy( p_out, p_in, i_copy_pitch );
 245                     p_in += i_in_pitch;
 246                     p_out += i_out_pitch;
 247                 }
 248             }
 249         }
 250
 251         vout_UnlinkPicture( p_vout->p_sys->pp_vout[ i_vout ], p_outpic );
 252         vout_DisplayPicture( p_vout->p_sys->pp_vout[ i_vout ], p_outpic );
 253     }
 254 }
 255
 256 /*****************************************************************************
 257  * RemoveAllVout: destroy all the child video output threads
 258  *****************************************************************************/
 259 static void RemoveAllVout( vout_thread_t *p_vout )
 260 {
 261     while( p_vout->p_sys->i_clones )
 262     {
 263          --p_vout->p_sys->i_clones;
 264          DEL_CALLBACKS( p_vout->p_sys->pp_vout[p_vout->p_sys->i_clones],
 265                         SendEvents );
 266          vout_Destroy( p_vout->p_sys->pp_vout[p_vout->p_sys->i_clones] );
 267     }
 268 }
 269
 270 /*****************************************************************************
 271  * SendEvents: forward mouse and keyboard events to the parent p_vout
 272  *****************************************************************************/
 273 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 274                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 275 {
 276     var_Set( (vlc_object_t *)p_data, psz_var, newval );
 277
 278     return VLC_SUCCESS;
 279 }
 280