git.sesse.net Git - vlc/blob - modules/video_output/picture.c

   1 /*****************************************************************************
   2  * picture.c:
   3  *****************************************************************************
   4  * Copyright (C) 2004-2005 VideoLAN
   5  * $Id: picture.c 10081 2005-03-01 15:33:51Z dionoea $
   6  *
   7  * Authors: Antoine Cellerier <dionoea@videolan.org>
   8  *          Christophe Massiot <massiot@via.ecp.fr>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #include <errno.h>                                                 /* ENOMEM */
  29 #include <stdlib.h>                                                /* free() */
  30 #include <string.h>                                            /* strerror() */
  31
  32 #include <vlc/vlc.h>
  33 #include <vlc/vout.h>
  34
  35 #include "vlc_image.h"
  36
  37 #include "picture.h"
  38
  39 /*****************************************************************************
  40  * Local structures
  41  *****************************************************************************/
  42 struct vout_sys_t
  43 {
  44     picture_vout_t *p_picture_vout;
  45     vlc_mutex_t *p_lock;
  46
  47     int i_picture_pos; /* picture position in p_picture_vout */
  48     image_handler_t *p_image; /* filters for resizing */
  49 #ifdef IMAGE_2PASSES
  50     image_handler_t *p_image2;
  51 #endif
  52     int i_height, i_width;
  53     mtime_t i_last_pic;
  54 };
  55
  56 /* Delay after which the picture is blanked out if there hasn't been any
  57  * new picture. */
  58 #define BLANK_DELAY     I64C(1000000)
  59
  60 typedef void (* pf_release_t)( picture_t * );
  61 static void ReleasePicture( picture_t *p_pic )
  62 {
  63     p_pic->i_refcount--;
  64
  65     if ( p_pic->i_refcount <= 0 )
  66     {
  67         if ( p_pic->p_sys != NULL )
  68         {
  69             pf_release_t pf_release = (pf_release_t)p_pic->p_sys;
  70             p_pic->p_sys = NULL;
  71             pf_release( p_pic );
  72         }
  73         else
  74         {
  75             if( p_pic && p_pic->p_data_orig ) free( p_pic->p_data_orig );
  76             if( p_pic ) free( p_pic );
  77         }
  78     }
  79 }
  80
  81 /*****************************************************************************
  82  * Local prototypes
  83  *****************************************************************************/
  84 static int  Open    ( vlc_object_t * );
  85 static void Close   ( vlc_object_t * );
  86 static int  Init    ( vout_thread_t * );
  87 static void End     ( vout_thread_t * );
  88 static int  Manage  ( vout_thread_t * );
  89 static void Display ( vout_thread_t *, picture_t * );
  90
  91 /*****************************************************************************
  92  * Module descriptor
  93  *****************************************************************************/
  94 #define ID_TEXT N_("ID")
  95 #define ID_LONGTEXT N_( \
  96     "Specify an identifier string for this subpicture" )
  97
  98 #define WIDTH_TEXT N_("Video width")
  99 #define WIDTH_LONGTEXT N_( \
 100     "Allows you to specify the output video width." )
 101 #define HEIGHT_TEXT N_("Video height")
 102 #define HEIGHT_LONGTEXT N_( \
 103     "Allows you to specify the output video height." )
 104
 105 vlc_module_begin();
 106     set_shortname( _( "Picture" ) );
 107     set_description(_("VLC internal picture video output") );
 108     set_capability( "video output", 0 );
 109
 110     add_string( "picture-id", "Id", NULL, ID_TEXT, ID_LONGTEXT, VLC_FALSE );
 111     add_integer( "picture-width", 0, NULL, WIDTH_TEXT,
 112                  WIDTH_LONGTEXT, VLC_TRUE );
 113     add_integer( "picture-height", 0, NULL, HEIGHT_TEXT,
 114                  HEIGHT_LONGTEXT, VLC_TRUE );
 115
 116     set_callbacks( Open, Close );
 117
 118     var_Create( p_module->p_libvlc, "picture-lock", VLC_VAR_MUTEX );
 119 vlc_module_end();
 120
 121 /*****************************************************************************
 122  * Open : allocate video thread output method
 123  *****************************************************************************/
 124 static int Open( vlc_object_t *p_this )
 125 {
 126     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 127     vout_sys_t *p_sys;
 128     libvlc_t *p_libvlc = p_vout->p_libvlc;
 129     picture_vout_t *p_picture_vout = NULL;
 130     picture_vout_e_t *p_pic;
 131     vlc_value_t val, lockval;
 132
 133     p_sys = p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 134     if( p_sys == NULL )
 135     {
 136         msg_Err( p_vout, "out of memory" );
 137         return VLC_ENOMEM;
 138     }
 139
 140     var_Get( p_libvlc, "picture-lock", &lockval );
 141     p_sys->p_lock = lockval.p_address;
 142     vlc_mutex_lock( p_sys->p_lock );
 143
 144     p_sys->i_picture_pos = -1;
 145     if( var_Get( p_libvlc, "p_picture_vout", &val ) != VLC_SUCCESS )
 146     {
 147         p_picture_vout = malloc( sizeof( struct picture_vout_t ) );
 148         if( p_picture_vout == NULL )
 149         {
 150             msg_Err( p_vout, "out of memory" );
 151             return VLC_ENOMEM;
 152         }
 153
 154         var_Create( p_libvlc, "p_picture_vout", VLC_VAR_ADDRESS );
 155         val.p_address = p_picture_vout;
 156         var_Set( p_libvlc, "p_picture_vout", val );
 157
 158         p_picture_vout->i_picture_num = 0;
 159         p_picture_vout->p_pic = NULL;
 160     }
 161     else
 162     {
 163         int i;
 164         p_picture_vout = val.p_address;
 165         for ( i = 0; i < p_picture_vout->i_picture_num; i++ )
 166         {
 167             if ( p_picture_vout->p_pic[i].i_status == PICTURE_VOUT_E_AVAILABLE )
 168                 break;
 169         }
 170
 171         if ( i != p_picture_vout->i_picture_num )
 172             p_sys->i_picture_pos = i;
 173     }
 174
 175     p_sys->p_picture_vout = p_picture_vout;
 176
 177     if ( p_sys->i_picture_pos == -1 )
 178     {
 179         p_picture_vout->p_pic = realloc( p_picture_vout->p_pic,
 180                                          (p_picture_vout->i_picture_num + 1)
 181                                            * sizeof(picture_vout_e_t) );
 182         p_sys->i_picture_pos = p_picture_vout->i_picture_num;
 183         p_picture_vout->i_picture_num++;
 184     }
 185
 186     p_pic = &p_picture_vout->p_pic[p_sys->i_picture_pos];
 187     p_pic->p_picture = NULL;
 188     p_pic->i_status = PICTURE_VOUT_E_OCCUPIED;
 189
 190     var_Create( p_vout, "picture-id", VLC_VAR_STRING );
 191     var_Change( p_vout, "picture-id", VLC_VAR_INHERITVALUE, &val, NULL );
 192     p_pic->psz_id = val.psz_string;
 193
 194     vlc_mutex_unlock( p_sys->p_lock );
 195
 196     var_Create( p_vout, "picture-height", VLC_VAR_INTEGER );
 197     var_Change( p_vout, "picture-height", VLC_VAR_INHERITVALUE, &val, NULL );
 198     p_sys->i_height = val.i_int;
 199
 200     var_Create( p_vout, "picture-width", VLC_VAR_INTEGER );
 201     var_Change( p_vout, "picture-width", VLC_VAR_INHERITVALUE, &val, NULL );
 202     p_sys->i_width = val.i_int;
 203
 204     if ( p_sys->i_height || p_sys->i_width )
 205     {
 206         p_sys->p_image = image_HandlerCreate( p_vout );
 207 #ifdef IMAGE_2PASSES
 208         p_sys->p_image2 = image_HandlerCreate( p_vout );
 209 #endif
 210     }
 211
 212     p_sys->i_last_pic = 0;
 213
 214     p_vout->pf_init = Init;
 215     p_vout->pf_end = End;
 216     p_vout->pf_manage = Manage;
 217     p_vout->pf_render = NULL;
 218     p_vout->pf_display = Display;
 219
 220     return VLC_SUCCESS;
 221 }
 222
 223
 224 /*****************************************************************************
 225  * Init
 226  *****************************************************************************/
 227 static int Init( vout_thread_t *p_vout )
 228 {
 229     picture_t *p_pic;
 230     int i_index;
 231
 232     I_OUTPUTPICTURES = 0;
 233
 234     p_vout->output.i_chroma = p_vout->render.i_chroma;
 235     p_vout->output.i_width  = p_vout->render.i_width;
 236     p_vout->output.i_height = p_vout->render.i_height;
 237     p_vout->output.i_aspect = p_vout->render.i_aspect;
 238
 239     while( VLC_TRUE )
 240     {
 241         p_pic = NULL;
 242
 243         for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 244         {
 245             if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 246             {
 247                 p_pic = p_vout->p_picture + i_index;
 248                 break;
 249             }
 250         }
 251
 252         if( p_pic == NULL )
 253         {
 254             return VLC_SUCCESS;
 255         }
 256
 257         vout_AllocatePicture( VLC_OBJECT(p_vout), p_pic,
 258                               p_vout->output.i_chroma,
 259                               p_vout->output.i_width, p_vout->output.i_height,
 260                               p_vout->output.i_aspect );
 261
 262         if( p_pic->i_planes == 0 )
 263         {
 264             return VLC_EGENERIC;
 265         }
 266
 267         p_pic->i_status = DESTROYED_PICTURE;
 268         p_pic->i_type   = DIRECT_PICTURE;
 269
 270         PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 271
 272         I_OUTPUTPICTURES++;
 273
 274         //return VLC_SUCCESS;
 275     }
 276
 277 }
 278
 279 /*****************************************************************************
 280  * End
 281  *****************************************************************************/
 282 static void End( vout_thread_t *p_vout )
 283 {
 284     return;
 285 }
 286
 287 /*****************************************************************************
 288  * Close
 289  *****************************************************************************/
 290 static void Close( vlc_object_t *p_this )
 291 {
 292     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 293     vout_sys_t *p_sys = p_vout->p_sys;
 294     picture_vout_t *p_picture_vout = p_sys->p_picture_vout;
 295     picture_vout_e_t *p_pic;
 296     vlc_bool_t b_last_picture = VLC_TRUE;
 297     int i;
 298
 299     vlc_mutex_lock( p_sys->p_lock );
 300     p_pic = &p_picture_vout->p_pic[p_sys->i_picture_pos];
 301
 302     if( p_pic->p_picture )
 303     {
 304         p_pic->p_picture->pf_release( p_pic->p_picture );
 305         p_pic->p_picture = NULL;
 306     }
 307     p_pic->i_status = PICTURE_VOUT_E_AVAILABLE;
 308     if( p_pic->psz_id )
 309         free( p_pic->psz_id );
 310
 311     for( i = 0; i < p_picture_vout->i_picture_num; i ++)
 312     {
 313         if( p_picture_vout->p_pic[i].i_status == PICTURE_VOUT_E_OCCUPIED )
 314         {
 315             b_last_picture = VLC_FALSE;
 316             break;
 317         }
 318     }
 319
 320     if( b_last_picture )
 321     {
 322         free( p_picture_vout->p_pic );
 323         free( p_picture_vout );
 324         var_Destroy( p_this->p_libvlc, "p_picture_vout" );
 325     }
 326
 327     vlc_mutex_unlock( p_sys->p_lock );
 328
 329     if ( p_sys->i_height || p_sys->i_width )
 330     {
 331         image_HandlerDelete( p_sys->p_image );
 332 #ifdef IMAGE_2PASSES
 333         image_HandlerDelete( p_sys->p_image2 );
 334 #endif
 335     }
 336
 337     free( p_sys );
 338 }
 339
 340 /*****************************************************************************
 341  * PushPicture : push a picture in the p_picture_vout structure
 342  *****************************************************************************/
 343 static void PushPicture( vout_thread_t *p_vout, picture_t *p_picture )
 344 {
 345     vout_sys_t *p_sys = p_vout->p_sys;
 346     picture_vout_t *p_picture_vout = p_sys->p_picture_vout;
 347     picture_vout_e_t *p_pic;
 348
 349     vlc_mutex_lock( p_sys->p_lock );
 350     p_pic = &p_picture_vout->p_pic[p_sys->i_picture_pos];
 351
 352     if( p_pic->p_picture != NULL )
 353     {
 354         p_pic->p_picture->pf_release( p_pic->p_picture );
 355     }
 356     p_pic->p_picture = p_picture;
 357
 358     vlc_mutex_unlock( p_sys->p_lock );
 359 }
 360
 361 /*****************************************************************************
 362  * Manage
 363  *****************************************************************************/
 364 static int Manage( vout_thread_t *p_vout )
 365 {
 366     vout_sys_t *p_sys = p_vout->p_sys;
 367
 368     if ( mdate() - p_sys->i_last_pic > BLANK_DELAY )
 369     {
 370         /* Display black */
 371 #if 0
 372         picture_t *p_new_pic = (picture_t*)malloc( sizeof(picture_t) );
 373         int i;
 374
 375         if ( p_sys->i_height || p_sys->i_width )
 376         {
 377             vout_AllocatePicture( p_vout, p_new_pic,
 378                                   VLC_FOURCC('Y','U','V','A'),
 379                                   p_sys->i_width, p_sys->i_height,
 380                                   p_vout->render.i_aspect );
 381         }
 382         else
 383         {
 384             vout_AllocatePicture( p_vout, p_new_pic, p_vout->render.i_chroma,
 385                                   p_vout->render.i_width,
 386                                   p_vout->render.i_height,
 387                                   p_vout->render.i_aspect );
 388         }
 389
 390         p_new_pic->i_refcount++;
 391         p_new_pic->i_status = DESTROYED_PICTURE;
 392         p_new_pic->i_type   = DIRECT_PICTURE;
 393         p_new_pic->pf_release = ReleasePicture;
 394
 395         for ( i = 0; i < p_pic->i_planes; i++ )
 396         {
 397             /* This assumes planar YUV format */
 398             p_vout->p_vlc->pf_memset( p_pic->p[i].p_pixels, i ? 0x80 : 0,
 399                                       p_pic->p[i].i_lines
 400                                        * p_pic->p[i].i_pitch );
 401         }
 402
 403         PushPicture( p_vout, p_new_pic );
 404 #else
 405         PushPicture( p_vout, NULL );
 406 #endif
 407         p_sys->i_last_pic = INT64_MAX;
 408     }
 409
 410     return VLC_SUCCESS;
 411 }
 412
 413 /*****************************************************************************
 414  * Display
 415  *****************************************************************************/
 416 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
 417 {
 418     vout_sys_t *p_sys = p_vout->p_sys;
 419     picture_t *p_new_pic;
 420
 421     if ( p_sys->i_height || p_sys->i_width )
 422     {
 423         video_format_t fmt_out = {0}, fmt_in = {0};
 424 #ifdef IMAGE_2PASSES
 425         vide_format_t fmt_middle = {0};
 426         picture_t *p_new_pic2;
 427 #endif
 428
 429         fmt_in.i_chroma = p_vout->render.i_chroma;
 430         fmt_in.i_width = p_vout->render.i_width;
 431         fmt_in.i_height = p_vout->render.i_height;
 432
 433 #ifdef IMAGE_2PASSES
 434         fmt_middle.i_chroma = p_vout->render.i_chroma;
 435         fmt_middle.i_width = p_vout->p_sys->i_width;
 436         fmt_middle.i_height = p_vout->p_sys->i_height;
 437         fmt_middle.i_visible_width = fmt_middle.i_width;
 438         fmt_middle.i_visible_height = fmt_middle.i_height;
 439
 440         p_new_pic2 = image_Convert( p_vout->p_sys->p_image2,
 441                                     p_pic, &fmt_in, &fmt_middle );
 442         if ( p_new_pic2 == NULL )
 443         {
 444             msg_Err( p_vout, "image resizing failed %dx%d->%dx%d %4.4s",
 445                      p_vout->render.i_width, p_vout->render.i_height,
 446                      fmt_middle.i_width, fmt_middle.i_height,
 447                      (char *)&p_vout->render.i_chroma);
 448             return;
 449         }
 450 #endif
 451
 452         fmt_out.i_chroma = VLC_FOURCC('Y','U','V','A');
 453         fmt_out.i_width = p_sys->i_width;
 454         fmt_out.i_height = p_sys->i_height;
 455         fmt_out.i_visible_width = fmt_out.i_width;
 456         fmt_out.i_visible_height = fmt_out.i_height;
 457
 458 #ifdef IMAGE_2PASSES
 459         p_new_pic = image_Convert( p_vout->p_sys->p_image,
 460                                    p_new_pic2, &fmt_middle, &fmt_out );
 461         p_new_pic2->pf_release( p_new_pic2 );
 462 #else
 463         p_new_pic = image_Convert( p_vout->p_sys->p_image,
 464                                    p_pic, &fmt_in, &fmt_out );
 465 #endif
 466         if ( p_new_pic == NULL )
 467         {
 468             msg_Err( p_vout, "image conversion failed" );
 469             return;
 470         }
 471     }
 472     else
 473     {
 474         p_new_pic = (picture_t*)malloc( sizeof(picture_t) );
 475         vout_AllocatePicture( p_vout, p_new_pic, p_pic->format.i_chroma,
 476                               p_pic->format.i_width, p_pic->format.i_height,
 477                               p_vout->render.i_aspect );
 478
 479         vout_CopyPicture( p_vout, p_new_pic, p_pic );
 480     }
 481
 482     p_new_pic->i_refcount = 1;
 483     p_new_pic->i_status = DESTROYED_PICTURE;
 484     p_new_pic->i_type   = DIRECT_PICTURE;
 485     p_new_pic->p_sys = (picture_sys_t *)p_new_pic->pf_release;
 486     p_new_pic->pf_release = ReleasePicture;
 487
 488     PushPicture( p_vout, p_new_pic );
 489     p_sys->i_last_pic = p_pic->date;
 490 }