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 1.1 2002/08/04 17:23:43 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 <errno.h>
  28 #include <stdlib.h>                                      /* malloc(), free() */
  29 #include <string.h>
  30
  31 #include <vlc/vlc.h>
  32 #include <vlc/vout.h>
  33
  34 #include "filter_common.h"
  35
  36 /*****************************************************************************
  37  * Local prototypes
  38  *****************************************************************************/
  39 static int  Create    ( vlc_object_t * );
  40 static void Destroy   ( vlc_object_t * );
  41
  42 static int  Init      ( vout_thread_t * );
  43 static void End       ( vout_thread_t * );
  44 static void Render    ( vout_thread_t *, picture_t * );
  45
  46 static void RemoveAllVout  ( vout_thread_t *p_vout );
  47
  48 /*****************************************************************************
  49  * Module descriptor
  50  *****************************************************************************/
  51 #define COUNT_TEXT N_("Number of clones")
  52 #define COUNT_LONGTEXT N_("Select the number of video windows in which to "\
  53     "clone the video")
  54
  55 vlc_module_begin();
  56     add_category_hint( N_("Miscellaneous"), NULL );
  57     add_integer( "clone-count", 2, NULL, COUNT_TEXT, COUNT_LONGTEXT );
  58     set_description( _("image clone video module") );
  59     set_capability( "video filter", 0 );
  60     add_shortcut( "clone" );
  61     set_callbacks( Create, Destroy );
  62 vlc_module_end();
  63
  64 /*****************************************************************************
  65  * vout_sys_t: Clone video output method descriptor
  66  *****************************************************************************
  67  * This structure is part of the video output thread descriptor.
  68  * It describes the Clone specific properties of an output thread.
  69  *****************************************************************************/
  70 struct vout_sys_t
  71 {
  72     int    i_clones;
  73     vout_thread_t **pp_vout;
  74 };
  75
  76 /*****************************************************************************
  77  * Create: allocates Clone video thread output method
  78  *****************************************************************************
  79  * This function allocates and initializes a Clone vout method.
  80  *****************************************************************************/
  81 static int Create( vlc_object_t *p_this )
  82 {
  83     vout_thread_t *p_vout = (vout_thread_t *)p_this;
  84
  85     /* Allocate structure */
  86     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
  87     if( p_vout->p_sys == NULL )
  88     {
  89         msg_Err( p_vout, "out of memory" );
  90         return( 1 );
  91     }
  92
  93     p_vout->pf_init = Init;
  94     p_vout->pf_end = End;
  95     p_vout->pf_manage = NULL;
  96     p_vout->pf_render = Render;
  97     p_vout->pf_display = NULL;
  98
  99     /* Look what method was requested */
 100     p_vout->p_sys->i_clones = config_GetInt( p_vout, "clone-count" );
 101
 102     p_vout->p_sys->i_clones = __MAX( 1, __MIN( 99, p_vout->p_sys->i_clones ) );
 103
 104     msg_Dbg( p_vout, "spawning %i clone(s)", p_vout->p_sys->i_clones );
 105
 106     p_vout->p_sys->pp_vout = malloc( p_vout->p_sys->i_clones *
 107                                      sizeof(vout_thread_t *) );
 108     if( p_vout->p_sys->pp_vout == NULL )
 109     {
 110         msg_Err( p_vout, "out of memory" );
 111         free( p_vout->p_sys );
 112         return( 1 );
 113     }
 114
 115     return( 0 );
 116 }
 117
 118 /*****************************************************************************
 119  * Init: initialize Clone video thread output method
 120  *****************************************************************************/
 121 static int Init( vout_thread_t *p_vout )
 122 {
 123     int   i_index, i_vout;
 124     picture_t *p_pic;
 125
 126     I_OUTPUTPICTURES = 0;
 127
 128     /* Initialize the output structure */
 129     p_vout->output.i_chroma = p_vout->render.i_chroma;
 130     p_vout->output.i_width  = p_vout->render.i_width;
 131     p_vout->output.i_height = p_vout->render.i_height;
 132     p_vout->output.i_aspect = p_vout->render.i_aspect;
 133
 134     /* Try to open the real video output */
 135     msg_Dbg( p_vout, "spawning the real video outputs" );
 136
 137     for( i_vout = 0; i_vout < p_vout->p_sys->i_clones; i_vout++ )
 138     {
 139         p_vout->p_sys->pp_vout[ i_vout ] =
 140                 vout_CreateThread( p_vout,
 141                             p_vout->render.i_width, p_vout->render.i_height,
 142                             p_vout->render.i_chroma, p_vout->render.i_aspect );
 143         if( p_vout->p_sys->pp_vout[ i_vout ] == NULL )
 144         {
 145             msg_Err( p_vout, "failed to clone %i vout threads",
 146                              p_vout->p_sys->i_clones );
 147             p_vout->p_sys->i_clones = i_vout;
 148             RemoveAllVout( p_vout );
 149             return 0;
 150         }
 151     }
 152
 153     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 154
 155     return( 0 );
 156 }
 157
 158 /*****************************************************************************
 159  * End: terminate Clone video thread output method
 160  *****************************************************************************/
 161 static void End( vout_thread_t *p_vout )
 162 {
 163     int i_index;
 164
 165     /* Free the fake output buffers we allocated */
 166     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 167     {
 168         i_index--;
 169         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 170     }
 171 }
 172
 173 /*****************************************************************************
 174  * Destroy: destroy Clone video thread output method
 175  *****************************************************************************
 176  * Terminate an output method created by CloneCreateOutputMethod
 177  *****************************************************************************/
 178 static void Destroy( vlc_object_t *p_this )
 179 {
 180     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 181
 182     RemoveAllVout( p_vout );
 183
 184     free( p_vout->p_sys->pp_vout );
 185     free( p_vout->p_sys );
 186 }
 187
 188 /*****************************************************************************
 189  * Render: displays previously rendered output
 190  *****************************************************************************
 191  * This function send the currently rendered image to Clone image, waits
 192  * until it is displayed and switch the two rendering buffers, preparing next
 193  * frame.
 194  *****************************************************************************/
 195 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 196 {
 197     picture_t *p_outpic = NULL;
 198     int i_vout, i_plane;
 199
 200     for( i_vout = 0; i_vout < p_vout->p_sys->i_clones; i_vout++ )
 201     {
 202         while( ( p_outpic =
 203             vout_CreatePicture( p_vout->p_sys->pp_vout[ i_vout ], 0, 0, 0 )
 204                ) == NULL )
 205         {
 206             if( p_vout->b_die || p_vout->b_error )
 207             {
 208                 vout_DestroyPicture(
 209                     p_vout->p_sys->pp_vout[ i_vout ], p_outpic );
 210                 return;
 211             }
 212
 213             msleep( VOUT_OUTMEM_SLEEP );
 214         }
 215
 216         vout_DatePicture( p_vout->p_sys->pp_vout[ i_vout ],
 217                           p_outpic, p_pic->date );
 218         vout_LinkPicture( p_vout->p_sys->pp_vout[ i_vout ], p_outpic );
 219
 220         for( i_plane = 0 ; i_plane < p_pic->i_planes ; i_plane++ )
 221         {
 222             u8 *p_in, *p_in_end, *p_out;
 223             int i_in_pitch = p_pic->p[i_plane].i_pitch;
 224             const int i_out_pitch = p_outpic->p[i_plane].i_pitch;
 225
 226             p_in = p_pic->p[i_plane].p_pixels;
 227
 228             p_in_end = p_in + p_outpic->p[i_plane].i_lines
 229                                * p_pic->p[i_plane].i_pitch;
 230
 231             p_out = p_outpic->p[i_plane].p_pixels;
 232
 233             while( p_in < p_in_end )
 234             {
 235                 p_vout->p_vlc->pf_memcpy( p_out, p_in, i_out_pitch );
 236                 p_in += i_in_pitch;
 237                 p_out += i_out_pitch;
 238             }
 239         }
 240
 241         vout_UnlinkPicture( p_vout->p_sys->pp_vout[ i_vout ], p_outpic );
 242         vout_DisplayPicture( p_vout->p_sys->pp_vout[ i_vout ], p_outpic );
 243     }
 244 }
 245
 246 /*****************************************************************************
 247  * RemoveAllVout: destroy all the child video output threads
 248  *****************************************************************************/
 249 static void RemoveAllVout( vout_thread_t *p_vout )
 250 {
 251     while( p_vout->p_sys->i_clones )
 252     {
 253          --p_vout->p_sys->i_clones;
 254          vout_DestroyThread( p_vout->p_sys->pp_vout[p_vout->p_sys->i_clones] );
 255     }
 256 }
 257