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

   1 /*****************************************************************************
   2  * logo.c : logo video plugin for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2000, 2001, 2002, 2003 VideoLAN
   5  * $Id: logo.c,v 1.6 2003/12/22 02:24:53 sam Exp $
   6  *
   7  * Authors: Simon Latapie <garf@videolan.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 <png.h>
  31
  32 #include <vlc/vlc.h>
  33 #include <vlc/vout.h>
  34
  35 #include "filter_common.h"
  36
  37
  38 /*****************************************************************************
  39  * Local prototypes
  40  *****************************************************************************/
  41 static int  Create    ( vlc_object_t * );
  42 static void Destroy   ( vlc_object_t * );
  43
  44 static int  Init      ( vout_thread_t * );
  45 static void End       ( vout_thread_t * );
  46 static void Render    ( vout_thread_t *, picture_t * );
  47
  48 static int  SendEvents( vlc_object_t *, char const *,
  49                         vlc_value_t, vlc_value_t, void * );
  50
  51 static int MouseEvent( vlc_object_t *, char const *,
  52                        vlc_value_t , vlc_value_t , void * );
  53
  54 /*****************************************************************************
  55  * Module descriptor
  56  *****************************************************************************/
  57
  58 #define FILE_TEXT N_("Logo filename")
  59 #define FILE_LONGTEXT N_("The file must be in PNG RGBA 8bits format (for now)")
  60 #define POSX_TEXT N_("X coordinate of the logo")
  61 #define POSX_LONGTEXT N_("You can move the logo by left-clicking on it" )
  62 #define POSY_TEXT N_("Y coordinate of the logo")
  63 #define POSY_LONGTEXT N_("You can move the logo by left-clicking on it" )
  64 #define TRANS_TEXT N_("transparency of the logo")
  65 #define TRANS_LONGTEXT N_("You can change it by middle-clicking and moving mouse left or right")
  66
  67 vlc_module_begin();
  68     add_category_hint( N_("logo"), NULL, VLC_FALSE );
  69     add_file( "logo_file", NULL, NULL, FILE_TEXT, FILE_LONGTEXT, VLC_FALSE );
  70     add_integer( "logo_x", 0, NULL, POSX_TEXT, POSX_LONGTEXT, VLC_FALSE );
  71     add_integer( "logo_y", 0, NULL, POSY_TEXT, POSY_LONGTEXT, VLC_FALSE );
  72     add_float( "logo_transparency", 1, NULL, TRANS_TEXT, TRANS_LONGTEXT, VLC_FALSE );
  73     set_description( _("logo video filter") );
  74     set_capability( "video filter", 0 );
  75     add_shortcut( "logo" );
  76     set_callbacks( Create, Destroy );
  77 vlc_module_end();
  78
  79 /*****************************************************************************
  80  * vout_sys_t: logo video output method descriptor
  81  *****************************************************************************
  82  * This structure is part of the video output thread descriptor.
  83  * It describes the Invert specific properties of an output thread.
  84  *****************************************************************************/
  85 struct vout_sys_t
  86 {
  87     vout_thread_t *p_vout;
  88     png_uint_32 height;
  89     int bit_depth;
  90     png_uint_32 width;
  91     uint8_t * png_image[3];
  92     uint8_t * png_image_u;
  93     uint8_t * png_image_v;
  94     uint8_t * png_image_a[3];
  95     uint8_t * png_image_a_little;
  96     int error;
  97     int posx, posy;
  98     int trans;
  99 };
 100
 101 /*****************************************************************************
 102  * Create: allocates logo video thread output method
 103  *****************************************************************************
 104  * This function allocates and initializes a Invert vout method.
 105  *****************************************************************************/
 106 static int Create( vlc_object_t *p_this )
 107 {
 108     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 109
 110     /* Allocate structure */
 111     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 112     if( p_vout->p_sys == NULL )
 113     {
 114         msg_Err( p_vout, "out of memory" );
 115         return VLC_ENOMEM;
 116     }
 117
 118     p_vout->pf_init = Init;
 119     p_vout->pf_end = End;
 120     p_vout->pf_manage = NULL;
 121     p_vout->pf_render = Render;
 122     p_vout->pf_display = NULL;
 123
 124     return VLC_SUCCESS;
 125 }
 126
 127 /*****************************************************************************
 128  * Init: initialize logo video thread output method
 129  *****************************************************************************/
 130 static int Init( vout_thread_t *p_vout )
 131 {
 132     int i_index;
 133     picture_t *p_pic;
 134     char * filename;
 135     FILE * fp;
 136     int color_type;
 137     int interlace_type;
 138     int compression_type;
 139     int filter_type;
 140     png_structp png_ptr;
 141     png_bytep * row_pointers;
 142     png_infop info_ptr;
 143     unsigned int i;
 144 //    unsigned int j;
 145     unsigned int x;
 146     unsigned int y;
 147     int temp;
 148     int i_size;
 149     int i_parity_width;
 150     int i_parity_height;
 151
 152     /*  read png file  */
 153     filename = config_GetPsz( p_vout, "logo_file" );
 154     fp = fopen( filename , "rb");
 155     png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL , NULL , NULL);
 156     info_ptr = png_create_info_struct(png_ptr);
 157
 158     if (fp == NULL)
 159     {
 160         p_vout->p_sys->error=1;
 161         msg_Err( p_vout , "file not found %s", filename );
 162         free( filename );
 163     }
 164     else
 165     {
 166         free( filename );
 167         p_vout->p_sys->error=0;
 168         png_init_io(png_ptr, fp);
 169         png_read_info(png_ptr, info_ptr);
 170         png_get_IHDR(png_ptr, info_ptr, &p_vout->p_sys->width, &p_vout->p_sys->height,
 171                      &p_vout->p_sys->bit_depth, &color_type, &interlace_type,
 172                      &compression_type, &filter_type);
 173         row_pointers= malloc( sizeof(png_bytep) * p_vout->p_sys->height );
 174         for( i = 0; i < p_vout->p_sys->height; i++ )
 175         {
 176             row_pointers[i] = malloc( 4 * ( p_vout->p_sys->bit_depth + 7 ) / 8 * p_vout->p_sys->width );
 177         }
 178         png_read_image(png_ptr, row_pointers);
 179         fclose(fp);
 180         /* finish to read the image in the file. Now We have to convert it YUV */
 181         /* initialize yuv plans of the image */
 182         i_parity_width = p_vout->p_sys->width % 2;
 183         i_parity_height = p_vout->p_sys->height % 2;
 184
 185         p_vout->p_sys->height = p_vout->p_sys->height
 186                              + (p_vout->p_sys->height % 2);
 187         p_vout->p_sys->width = p_vout->p_sys->width
 188                             + (p_vout->p_sys->width % 2);
 189         i_size = p_vout->p_sys->height * p_vout->p_sys->width;
 190
 191         p_vout->p_sys->png_image[0] = malloc( i_size );
 192         p_vout->p_sys->png_image[1] = malloc( i_size / 4 );
 193         p_vout->p_sys->png_image[2] = malloc( i_size / 4 );
 194
 195         p_vout->p_sys->png_image_a[0] = malloc( i_size );
 196         p_vout->p_sys->png_image_a[1] = malloc( i_size / 4 );
 197         p_vout->p_sys->png_image_a[2] = p_vout->p_sys->png_image_a[1];
 198
 199         for( y = 0; y < p_vout->p_sys->height ; y++)
 200         {
 201             for( x = 0; x < p_vout->p_sys->width ; x++)
 202             {
 203                 uint8_t (*p)[4];
 204                 int idx;
 205                 int idxc;
 206
 207                 /* FIXME FIXME */
 208                 p = (void*)row_pointers[y];
 209                 idx = x + y * p_vout->p_sys->width;
 210                 idxc= x/2 + (y/2) * (p_vout->p_sys->width/2);
 211
 212                 if( ((i_parity_width == 0) || (x != (p_vout->p_sys->width - 1))) &&
 213                     ((i_parity_height == 0) || (y != (p_vout->p_sys->height - 1))))
 214                 {
 215                     p_vout->p_sys->png_image_a[0][idx]= p[x][3];
 216                     p_vout->p_sys->png_image[0][idx]= (p[x][0] * 257
 217                                                      + p[x][1] * 504
 218                                                      + p[x][2] * 98)/1000 + 16;
 219
 220                     if( ( x % 2 == 0 ) && ( y % 2 == 0 ) )
 221                     {
 222
 223                         temp = (p[x][2] * 439
 224                               - p[x][0] * 148
 225                               - p[x][1] * 291)/1000 + 128;
 226
 227                         temp = __MAX( __MIN( temp, 255 ), 0 );
 228                         p_vout->p_sys->png_image[1][idxc] = temp;
 229
 230                         temp = ( p[x][0] * 439
 231                                - p[x][1] * 368
 232                                - p[x][2] * 71)/1000 + 128;
 233                         temp = __MAX( __MIN( temp, 255 ), 0 );
 234                         p_vout->p_sys->png_image[2][idxc] = temp;
 235                         p_vout->p_sys->png_image_a[1][idxc] = p_vout->p_sys->png_image_a[0][idx];
 236
 237                     }
 238
 239                 } else
 240                 {
 241                     p_vout->p_sys->png_image_a[0][idx]= 0;
 242                 }
 243             }
 244         }
 245         /* now we can free row_pointers*/
 246         free(row_pointers);
 247     }
 248
 249     I_OUTPUTPICTURES = 0;
 250
 251     /* Initialize the output structure */
 252     p_vout->output.i_chroma = p_vout->render.i_chroma;
 253     p_vout->output.i_width  = p_vout->render.i_width;
 254     p_vout->output.i_height = p_vout->render.i_height;
 255     p_vout->output.i_aspect = p_vout->render.i_aspect;
 256
 257     /* Try to open the real video output */
 258     msg_Dbg( p_vout, "spawning the real video output" );
 259
 260     p_vout->p_sys->p_vout = vout_Create( p_vout,
 261                            p_vout->render.i_width, p_vout->render.i_height,
 262                            p_vout->render.i_chroma, p_vout->render.i_aspect );
 263
 264     /* Everything failed */
 265     if( p_vout->p_sys->p_vout == NULL )
 266     {
 267         msg_Err( p_vout, "can't open vout, aborting" );
 268
 269         return VLC_EGENERIC;
 270     }
 271
 272     var_AddCallback( p_vout->p_sys->p_vout, "mouse-x", MouseEvent, p_vout);
 273     var_AddCallback( p_vout->p_sys->p_vout, "mouse-y", MouseEvent, p_vout);
 274
 275
 276     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 277
 278     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 279
 280     ADD_PARENT_CALLBACKS( SendEventsToChild );
 281
 282     p_vout->p_sys->posx = config_GetInt( p_vout, "logo_x" );
 283     p_vout->p_sys->posy = config_GetInt( p_vout, "logo_y" );
 284     p_vout->p_sys->trans = (int)(config_GetFloat( p_vout, "logo_transparency" ) * 255);
 285
 286     return VLC_SUCCESS;
 287 }
 288
 289 /*****************************************************************************
 290  * End: terminate logo video thread output method
 291  *****************************************************************************/
 292 static void End( vout_thread_t *p_vout )
 293 {
 294     int i_index;
 295
 296     /* Free the fake output buffers we allocated */
 297     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 298     {
 299         i_index--;
 300         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 301     }
 302
 303     var_DelCallback( p_vout->p_sys->p_vout, "mouse-x", MouseEvent, p_vout);
 304     var_DelCallback( p_vout->p_sys->p_vout, "mouse-y", MouseEvent, p_vout);
 305
 306     DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 307     vlc_object_detach( p_vout->p_sys->p_vout );
 308     vout_Destroy( p_vout->p_sys->p_vout );
 309
 310     config_PutInt( p_vout, "logo_x", p_vout->p_sys->posx );
 311     config_PutInt( p_vout, "logo_y", p_vout->p_sys->posy );
 312     config_PutFloat( p_vout, "logo_transparency", (float)(p_vout->p_sys->trans) / 255.0 );
 313
 314     if (p_vout->p_sys->error == 0)
 315     {
 316         free(p_vout->p_sys->png_image[0]);
 317         free(p_vout->p_sys->png_image[1]);
 318         free(p_vout->p_sys->png_image[2]);
 319         free(p_vout->p_sys->png_image_a[0]);
 320         free(p_vout->p_sys->png_image_a[1]);
 321     }
 322 }
 323
 324 /*****************************************************************************
 325  * Destroy: destroy logo video thread output method
 326  *****************************************************************************
 327  * Terminate an output method created by InvertCreateOutputMethod
 328  *****************************************************************************/
 329 static void Destroy( vlc_object_t *p_this )
 330 {
 331     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 332
 333     DEL_PARENT_CALLBACKS( SendEventsToChild );
 334
 335     free( p_vout->p_sys );
 336 }
 337
 338 /*****************************************************************************
 339  * Render: displays previously rendered output
 340  *****************************************************************************
 341  * This function send the currently rendered image to Invert image, waits
 342  * until it is displayed and switch the two rendering buffers, preparing next
 343  * frame.
 344  *****************************************************************************/
 345 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 346 {
 347     picture_t *p_outpic;
 348     int i_index;
 349     int tr;
 350
 351     /* This is a new frame. Get a structure from the video_output. */
 352     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 353               == NULL )
 354     {
 355         if( p_vout->b_die || p_vout->b_error )
 356         {
 357             return;
 358         }
 359         msleep( VOUT_OUTMEM_SLEEP );
 360     }
 361
 362     vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
 363     vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );
 364
 365
 366     tr = p_vout->p_sys->trans;
 367
 368     for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 369     {
 370         memcpy( p_outpic->p[i_index].p_pixels,
 371                 p_pic->p[i_index].p_pixels,
 372                 p_pic->p[i_index].i_lines * p_pic->p[i_index].i_pitch);
 373
 374
 375         if (p_vout->p_sys->error == 0)
 376         {
 377             unsigned int i;
 378             unsigned int j;
 379             uint8_t *p_out, *p_in_a, *p_in;
 380             int i_delta;
 381             unsigned int i_max;
 382             unsigned int j_max;
 383
 384             if (i_index == 0)
 385             {
 386                 p_out  = p_outpic->p[i_index].p_pixels +
 387                             p_vout->p_sys->posy * p_outpic->p[i_index].i_pitch +
 388                             p_vout->p_sys->posx;
 389                 i_max = p_vout->p_sys->height;
 390                 j_max = p_vout->p_sys->width;
 391             } else
 392             {
 393                 p_out  = p_outpic->p[i_index].p_pixels +
 394                          (p_vout->p_sys->posy/2)* p_outpic->p[i_index].i_pitch +
 395                          p_vout->p_sys->posx / 2;
 396                 i_max = p_vout->p_sys->height / 2;
 397                 j_max = p_vout->p_sys->width / 2;
 398             }
 399             i_delta = p_outpic->p[i_index].i_pitch - j_max;
 400
 401             p_in_a = p_vout->p_sys->png_image_a[i_index];
 402             p_in   = p_vout->p_sys->png_image[i_index];
 403
 404
 405             for( i = 0; i < i_max ; i++ )
 406             {
 407                 for( j = 0 ; j < j_max ; j++)
 408                 {
 409                     *p_out = ( *p_out * ( 65025 - *p_in_a * tr) + *p_in * *p_in_a * tr) >> 16;
 410                     p_out++;
 411                     p_in++;
 412                     p_in_a++;
 413                 }
 414                 p_out += i_delta;
 415             }
 416          }
 417     }
 418
 419     vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
 420
 421     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 422 }
 423
 424 /*****************************************************************************
 425  * SendEvents: forward mouse and keyboard events to the parent p_vout
 426  *****************************************************************************/
 427 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 428                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 429 {
 430     var_Set( (vlc_object_t *)p_data, psz_var, newval );
 431
 432     return VLC_SUCCESS;
 433 }
 434
 435
 436 /*****************************************************************************
 437  * MouseEvent: callback for mouse events
 438  ******************************************************************************/
 439 static int MouseEvent( vlc_object_t *p_this, char const *psz_var,
 440                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 441 {
 442     vout_thread_t *p_vout = (vout_thread_t*)p_data;
 443     vlc_value_t valb;
 444     int i_delta;
 445
 446     #define posx p_vout->p_sys->posx
 447     #define posy p_vout->p_sys->posy
 448     #define width p_vout->p_sys->width
 449     #define height p_vout->p_sys->height
 450     #define trans p_vout->p_sys->trans
 451
 452     var_Get( p_vout->p_sys->p_vout, "mouse-button-down", &valb );
 453
 454     i_delta = newval.i_int - oldval.i_int;
 455
 456     if ((valb.i_int & 0x2) == 2 && psz_var[6] == 'x' )
 457     {
 458         trans = __MIN( __MAX( trans + i_delta , 0 ) , 255 );
 459         return VLC_SUCCESS;
 460     }
 461     if ((valb.i_int & 0x1) == 0)
 462     {
 463         return VLC_SUCCESS;
 464     }
 465
 466     if( psz_var[6] == 'x' )
 467     {
 468         vlc_value_t valy;
 469         var_Get( p_vout->p_sys->p_vout, "mouse-y", &valy );
 470         if ((newval.i_int >= (int)posx) && (valy.i_int >= (int)posy) && (newval.i_int <= (int)(posx + width)) && (valy.i_int <= (int)(posy + height)))
 471         {
 472             posx = __MIN( __MAX( posx + i_delta , 0 ) , p_vout->output.i_width - width );
 473         }
 474
 475     }
 476     else if( psz_var[6] == 'y' )
 477     {
 478         vlc_value_t valx;
 479         var_Get( p_vout->p_sys->p_vout, "mouse-x", &valx );
 480         if ((valx.i_int >= (int)posx) && (newval.i_int >= (int)posy) && (valx.i_int <= (int)(posx + width)) && (newval.i_int <= (int)(posy + height)))
 481         {
 482             posy = __MIN( __MAX( posy + i_delta , 0 ) , p_vout->output.i_height - height );
 483         }
 484
 485     }
 486     else if( psz_var[6] == 'c' )
 487     {
 488         if ((valb.i_int & 0x8) == 1)
 489         {
 490             p_vout->p_sys->trans++;
 491         }
 492         else if ((valb.i_int & 0x10) == 1)
 493         {
 494             p_vout->p_sys->trans--;
 495         }
 496     }
 497
 498     #undef posx
 499     #undef posy
 500     #undef width
 501     #undef height
 502     #undef trans
 503
 504     return VLC_SUCCESS;
 505 }
 506
 507 /*****************************************************************************
 508  * SendEventsToChild: forward events to the child/children vout
 509  *****************************************************************************/
 510 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 511                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 512 {
 513     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 514     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 515     return VLC_SUCCESS;
 516 }