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

   1 /*****************************************************************************
   2  * logo.c : logo video plugin for vlc
   3  *****************************************************************************
   4  * Copyright (C) 2003-2004 VideoLAN
   5  * $Id: logo.c,v 1.10 2004/01/25 20:05:28 hartman 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 (255-0)")
  65 #define TRANS_LONGTEXT N_("You can change it by middle-clicking and moving mouse left or right")
  66
  67 vlc_module_begin();
  68     set_description( _("Logo video filter") );
  69     set_capability( "video filter", 0 );
  70
  71     add_file( "logo-file", NULL, NULL, FILE_TEXT, FILE_LONGTEXT, VLC_FALSE );
  72     add_integer( "logo-x", 0, NULL, POSX_TEXT, POSX_LONGTEXT, VLC_FALSE );
  73     add_integer( "logo-y", 0, NULL, POSY_TEXT, POSY_LONGTEXT, VLC_FALSE );
  74     add_integer_with_range( "logo-transparency", 255, 0, 255, NULL,
  75         TRANS_TEXT, TRANS_LONGTEXT, VLC_FALSE );
  76
  77     add_shortcut( "logo" );
  78     set_callbacks( Create, Destroy );
  79 vlc_module_end();
  80
  81 /*****************************************************************************
  82  * vout_sys_t: logo video output method descriptor
  83  *****************************************************************************
  84  * This structure is part of the video output thread descriptor.
  85  * It describes the Invert specific properties of an output thread.
  86  *****************************************************************************/
  87 struct vout_sys_t
  88 {
  89     vout_thread_t *p_vout;
  90     png_uint_32 height;
  91     int bit_depth;
  92     png_uint_32 width;
  93     uint8_t * png_image[3];
  94     uint8_t * png_image_u;
  95     uint8_t * png_image_v;
  96     uint8_t * png_image_a[3];
  97     uint8_t * png_image_a_little;
  98     int error;
  99     int posx, posy;
 100     int trans;
 101 };
 102
 103 /*****************************************************************************
 104  * Create: allocates logo video thread output method
 105  *****************************************************************************
 106  * This function allocates and initializes a Invert vout method.
 107  *****************************************************************************/
 108 static int Create( vlc_object_t *p_this )
 109 {
 110     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 111
 112     /* Allocate structure */
 113     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
 114     if( p_vout->p_sys == NULL )
 115     {
 116         msg_Err( p_vout, "out of memory" );
 117         return VLC_ENOMEM;
 118     }
 119
 120     p_vout->pf_init = Init;
 121     p_vout->pf_end = End;
 122     p_vout->pf_manage = NULL;
 123     p_vout->pf_render = Render;
 124     p_vout->pf_display = NULL;
 125
 126     return VLC_SUCCESS;
 127 }
 128
 129 /*****************************************************************************
 130  * Init: initialize logo video thread output method
 131  *****************************************************************************/
 132 static int Init( vout_thread_t *p_vout )
 133 {
 134     int i_index;
 135     picture_t *p_pic;
 136     char * filename;
 137     FILE * fp;
 138     int color_type;
 139     int interlace_type;
 140     int compression_type;
 141     int filter_type;
 142     png_structp png_ptr;
 143     png_bytep * row_pointers;
 144     png_infop info_ptr;
 145     unsigned int i;
 146 //    unsigned int j;
 147     unsigned int x;
 148     unsigned int y;
 149     int temp;
 150     int i_size;
 151     int i_parity_width;
 152     int i_parity_height;
 153
 154     /*  read png file  */
 155     filename = config_GetPsz( p_vout, "logo-file" );
 156     fp = fopen( filename , "rb");
 157     png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL , NULL , NULL);
 158     info_ptr = png_create_info_struct(png_ptr);
 159
 160     if (fp == NULL)
 161     {
 162         p_vout->p_sys->error=1;
 163         msg_Err( p_vout , "file not found %s", filename );
 164         free( filename );
 165     }
 166     else
 167     {
 168         free( filename );
 169         p_vout->p_sys->error=0;
 170         png_init_io(png_ptr, fp);
 171         png_read_info(png_ptr, info_ptr);
 172         png_get_IHDR(png_ptr, info_ptr, &p_vout->p_sys->width, &p_vout->p_sys->height,
 173                      &p_vout->p_sys->bit_depth, &color_type, &interlace_type,
 174                      &compression_type, &filter_type);
 175         row_pointers= malloc( sizeof(png_bytep) * p_vout->p_sys->height );
 176         for( i = 0; i < p_vout->p_sys->height; i++ )
 177         {
 178             row_pointers[i] = malloc( 4 * ( p_vout->p_sys->bit_depth + 7 ) / 8 * p_vout->p_sys->width );
 179         }
 180         png_read_image(png_ptr, row_pointers);
 181         fclose(fp);
 182         /* finish to read the image in the file. Now We have to convert it YUV */
 183         /* initialize yuv plans of the image */
 184         i_parity_width = p_vout->p_sys->width % 2;
 185         i_parity_height = p_vout->p_sys->height % 2;
 186
 187         p_vout->p_sys->height = p_vout->p_sys->height
 188                              + (p_vout->p_sys->height % 2);
 189         p_vout->p_sys->width = p_vout->p_sys->width
 190                             + (p_vout->p_sys->width % 2);
 191         i_size = p_vout->p_sys->height * p_vout->p_sys->width;
 192
 193         p_vout->p_sys->png_image[0] = malloc( i_size );
 194         p_vout->p_sys->png_image[1] = malloc( i_size / 4 );
 195         p_vout->p_sys->png_image[2] = malloc( i_size / 4 );
 196
 197         p_vout->p_sys->png_image_a[0] = malloc( i_size );
 198         p_vout->p_sys->png_image_a[1] = malloc( i_size / 4 );
 199         p_vout->p_sys->png_image_a[2] = p_vout->p_sys->png_image_a[1];
 200
 201         for( y = 0; y < p_vout->p_sys->height ; y++)
 202         {
 203             for( x = 0; x < p_vout->p_sys->width ; x++)
 204             {
 205                 uint8_t (*p)[4];
 206                 int idx;
 207                 int idxc;
 208
 209                 /* FIXME FIXME */
 210                 p = (void*)row_pointers[y];
 211                 idx = x + y * p_vout->p_sys->width;
 212                 idxc= x/2 + (y/2) * (p_vout->p_sys->width/2);
 213
 214                 if( ((i_parity_width == 0) || (x != (p_vout->p_sys->width - 1))) &&
 215                     ((i_parity_height == 0) || (y != (p_vout->p_sys->height - 1))))
 216                 {
 217                     p_vout->p_sys->png_image_a[0][idx]= p[x][3];
 218                     p_vout->p_sys->png_image[0][idx]= (p[x][0] * 257
 219                                                      + p[x][1] * 504
 220                                                      + p[x][2] * 98)/1000 + 16;
 221
 222                     if( ( x % 2 == 0 ) && ( y % 2 == 0 ) )
 223                     {
 224
 225                         temp = (p[x][2] * 439
 226                               - p[x][0] * 148
 227                               - p[x][1] * 291)/1000 + 128;
 228
 229                         temp = __MAX( __MIN( temp, 255 ), 0 );
 230                         p_vout->p_sys->png_image[1][idxc] = temp;
 231
 232                         temp = ( p[x][0] * 439
 233                                - p[x][1] * 368
 234                                - p[x][2] * 71)/1000 + 128;
 235                         temp = __MAX( __MIN( temp, 255 ), 0 );
 236                         p_vout->p_sys->png_image[2][idxc] = temp;
 237                         p_vout->p_sys->png_image_a[1][idxc] = p_vout->p_sys->png_image_a[0][idx];
 238
 239                     }
 240
 241                 } else
 242                 {
 243                     p_vout->p_sys->png_image_a[0][idx]= 0;
 244                 }
 245             }
 246         }
 247         /* now we can free row_pointers*/
 248         free(row_pointers);
 249     }
 250
 251     I_OUTPUTPICTURES = 0;
 252
 253     /* Initialize the output structure */
 254     p_vout->output.i_chroma = p_vout->render.i_chroma;
 255     p_vout->output.i_width  = p_vout->render.i_width;
 256     p_vout->output.i_height = p_vout->render.i_height;
 257     p_vout->output.i_aspect = p_vout->render.i_aspect;
 258
 259     /* Try to open the real video output */
 260     msg_Dbg( p_vout, "spawning the real video output" );
 261
 262     p_vout->p_sys->p_vout = vout_Create( p_vout,
 263                            p_vout->render.i_width, p_vout->render.i_height,
 264                            p_vout->render.i_chroma, p_vout->render.i_aspect );
 265
 266     /* Everything failed */
 267     if( p_vout->p_sys->p_vout == NULL )
 268     {
 269         msg_Err( p_vout, "can't open vout, aborting" );
 270
 271         return VLC_EGENERIC;
 272     }
 273
 274     var_AddCallback( p_vout->p_sys->p_vout, "mouse-x", MouseEvent, p_vout);
 275     var_AddCallback( p_vout->p_sys->p_vout, "mouse-y", MouseEvent, p_vout);
 276
 277
 278     ALLOCATE_DIRECTBUFFERS( VOUT_MAX_PICTURES );
 279
 280     ADD_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 281
 282     ADD_PARENT_CALLBACKS( SendEventsToChild );
 283
 284     p_vout->p_sys->posx = config_GetInt( p_vout, "logo-x" );
 285     p_vout->p_sys->posy = config_GetInt( p_vout, "logo-y" );
 286     p_vout->p_sys->trans = config_GetInt( p_vout, "logo-transparency");
 287
 288     return VLC_SUCCESS;
 289 }
 290
 291 /*****************************************************************************
 292  * End: terminate logo video thread output method
 293  *****************************************************************************/
 294 static void End( vout_thread_t *p_vout )
 295 {
 296     int i_index;
 297
 298     /* Free the fake output buffers we allocated */
 299     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 300     {
 301         i_index--;
 302         free( PP_OUTPUTPICTURE[ i_index ]->p_data_orig );
 303     }
 304
 305     var_DelCallback( p_vout->p_sys->p_vout, "mouse-x", MouseEvent, p_vout);
 306     var_DelCallback( p_vout->p_sys->p_vout, "mouse-y", MouseEvent, p_vout);
 307
 308     DEL_CALLBACKS( p_vout->p_sys->p_vout, SendEvents );
 309     vlc_object_detach( p_vout->p_sys->p_vout );
 310     vout_Destroy( p_vout->p_sys->p_vout );
 311
 312     config_PutInt( p_vout, "logo-x", p_vout->p_sys->posx );
 313     config_PutInt( p_vout, "logo-y", p_vout->p_sys->posy );
 314
 315     if (p_vout->p_sys->error == 0)
 316     {
 317         free(p_vout->p_sys->png_image[0]);
 318         free(p_vout->p_sys->png_image[1]);
 319         free(p_vout->p_sys->png_image[2]);
 320         free(p_vout->p_sys->png_image_a[0]);
 321         free(p_vout->p_sys->png_image_a[1]);
 322     }
 323 }
 324
 325 /*****************************************************************************
 326  * Destroy: destroy logo video thread output method
 327  *****************************************************************************
 328  * Terminate an output method created by InvertCreateOutputMethod
 329  *****************************************************************************/
 330 static void Destroy( vlc_object_t *p_this )
 331 {
 332     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 333
 334     DEL_PARENT_CALLBACKS( SendEventsToChild );
 335
 336     free( p_vout->p_sys );
 337 }
 338
 339 /*****************************************************************************
 340  * Render: displays previously rendered output
 341  *****************************************************************************
 342  * This function send the currently rendered image to Invert image, waits
 343  * until it is displayed and switch the two rendering buffers, preparing next
 344  * frame.
 345  *****************************************************************************/
 346 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 347 {
 348     picture_t *p_outpic;
 349     int i_index;
 350     int tr;
 351
 352     /* This is a new frame. Get a structure from the video_output. */
 353     while( ( p_outpic = vout_CreatePicture( p_vout->p_sys->p_vout, 0, 0, 0 ) )
 354               == NULL )
 355     {
 356         if( p_vout->b_die || p_vout->b_error )
 357         {
 358             return;
 359         }
 360         msleep( VOUT_OUTMEM_SLEEP );
 361     }
 362
 363     vout_DatePicture( p_vout->p_sys->p_vout, p_outpic, p_pic->date );
 364     vout_LinkPicture( p_vout->p_sys->p_vout, p_outpic );
 365
 366
 367     tr = p_vout->p_sys->trans;
 368
 369     for( i_index = 0 ; i_index < p_pic->i_planes ; i_index++ )
 370     {
 371         memcpy( p_outpic->p[i_index].p_pixels,
 372                 p_pic->p[i_index].p_pixels,
 373                 p_pic->p[i_index].i_lines * p_pic->p[i_index].i_pitch);
 374
 375
 376         if (p_vout->p_sys->error == 0)
 377         {
 378             unsigned int i;
 379             unsigned int j;
 380             uint8_t *p_out, *p_in_a, *p_in;
 381             int i_delta;
 382             unsigned int i_max;
 383             unsigned int j_max;
 384
 385             if (i_index == 0)
 386             {
 387                 p_out  = p_outpic->p[i_index].p_pixels +
 388                             p_vout->p_sys->posy * p_outpic->p[i_index].i_pitch +
 389                             p_vout->p_sys->posx;
 390                 i_max = p_vout->p_sys->height;
 391                 j_max = p_vout->p_sys->width;
 392             } else
 393             {
 394                 p_out  = p_outpic->p[i_index].p_pixels +
 395                             p_vout->p_sys->posy / 2 * p_outpic->p[i_index].i_pitch +
 396                          p_vout->p_sys->posx / 2;
 397                 i_max = p_vout->p_sys->height / 2;
 398                 j_max = p_vout->p_sys->width / 2;
 399             }
 400             i_delta = p_outpic->p[i_index].i_pitch - j_max;
 401
 402             p_in_a = p_vout->p_sys->png_image_a[i_index];
 403             p_in   = p_vout->p_sys->png_image[i_index];
 404
 405
 406             for( i = 0; i < i_max ; i++ )
 407             {
 408                 for( j = 0 ; j < j_max ; j++)
 409                 {
 410                     *p_out = ( *p_out * ( 65025 - *p_in_a * tr) + *p_in * *p_in_a * tr ) >> 16;
 411                     p_out++;
 412                     p_in++;
 413                     p_in_a++;
 414                 }
 415                 p_out += i_delta;
 416             }
 417          }
 418     }
 419
 420     vout_UnlinkPicture( p_vout->p_sys->p_vout, p_outpic );
 421
 422     vout_DisplayPicture( p_vout->p_sys->p_vout, p_outpic );
 423 }
 424
 425 /*****************************************************************************
 426  * SendEvents: forward mouse and keyboard events to the parent p_vout
 427  *****************************************************************************/
 428 static int SendEvents( vlc_object_t *p_this, char const *psz_var,
 429                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 430 {
 431     var_Set( (vlc_object_t *)p_data, psz_var, newval );
 432
 433     return VLC_SUCCESS;
 434 }
 435
 436
 437 /*****************************************************************************
 438  * MouseEvent: callback for mouse events
 439  ******************************************************************************/
 440 static int MouseEvent( vlc_object_t *p_this, char const *psz_var,
 441                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 442 {
 443     vout_thread_t *p_vout = (vout_thread_t*)p_data;
 444     vlc_value_t valb;
 445     int i_delta;
 446
 447     #define posx p_vout->p_sys->posx
 448     #define posy p_vout->p_sys->posy
 449     #define width p_vout->p_sys->width
 450     #define height p_vout->p_sys->height
 451     #define trans p_vout->p_sys->trans
 452
 453     var_Get( p_vout->p_sys->p_vout, "mouse-button-down", &valb );
 454
 455     i_delta = newval.i_int - oldval.i_int;
 456
 457     if ((valb.i_int & 0x2) == 2 && psz_var[6] == 'x' )
 458     {
 459         trans = __MIN( __MAX( trans + i_delta , 0 ) , 255 );
 460         return VLC_SUCCESS;
 461     }
 462     if ((valb.i_int & 0x1) == 0)
 463     {
 464         return VLC_SUCCESS;
 465     }
 466
 467     if( psz_var[6] == 'x' )
 468     {
 469         vlc_value_t valy;
 470         var_Get( p_vout->p_sys->p_vout, "mouse-y", &valy );
 471         if ((newval.i_int >= (int)posx) && (valy.i_int >= (int)posy) && (newval.i_int <= (int)(posx + width)) && (valy.i_int <= (int)(posy + height)))
 472         {
 473             posx = __MIN( __MAX( posx + i_delta , 0 ) , p_vout->output.i_width - width );
 474         }
 475
 476     }
 477     else if( psz_var[6] == 'y' )
 478     {
 479         vlc_value_t valx;
 480         var_Get( p_vout->p_sys->p_vout, "mouse-x", &valx );
 481         if ((valx.i_int >= (int)posx) && (newval.i_int >= (int)posy) && (valx.i_int <= (int)(posx + width)) && (newval.i_int <= (int)(posy + height)))
 482         {
 483             posy = __MIN( __MAX( posy + i_delta , 0 ) , p_vout->output.i_height - height );
 484         }
 485
 486     }
 487     else if( psz_var[6] == 'c' )
 488     {
 489         if ((valb.i_int & 0x8) == 1)
 490         {
 491             p_vout->p_sys->trans++;
 492         }
 493         else if ((valb.i_int & 0x10) == 1)
 494         {
 495             p_vout->p_sys->trans--;
 496         }
 497     }
 498
 499     #undef posx
 500     #undef posy
 501     #undef width
 502     #undef height
 503     #undef trans
 504
 505     return VLC_SUCCESS;
 506 }
 507
 508 /*****************************************************************************
 509  * SendEventsToChild: forward events to the child/children vout
 510  *****************************************************************************/
 511 static int SendEventsToChild( vlc_object_t *p_this, char const *psz_var,
 512                        vlc_value_t oldval, vlc_value_t newval, void *p_data )
 513 {
 514     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 515     var_Set( p_vout->p_sys->p_vout, psz_var, newval );
 516     return VLC_SUCCESS;
 517 }