libmpcodecs/vf_bmovl.c

   1 /* vf_bmovl.c v0.9.1 - BitMap OVerLay videofilter for MPlayer
   2  *
   3  * (C) 2002 Per Wigren <wigren@home.se>
   4  * Licenced under the GNU General Public License
   5  *
   6  * Use MPlayer as a framebuffer to read bitmaps and commands from a FIFO
   7  * and display them in the window.
   8  *
   9  * Commands are:
  10  *
  11  * RGBA32 width height xpos ypos alpha clear
  12  *   * Followed by width*height*4 bytes of raw RGBA32 data.
  13  * ABGR32 width height xpos ypos alpha clear
  14  *   * Followed by width*height*4 bytes of raw ABGR32 data.
  15  * RGB24 width height xpos ypos alpha clear
  16  *   * Followed by width*height*3 bytes of raw RGB32 data.
  17  * BGR24 width height xpos ypos alpha clear
  18  *   * Followed by width*height*3 bytes of raw BGR32 data.
  19  *
  20  * ALPHA width height xpos ypos alpha
  21  *   * Change alpha for area
  22  * CLEAR width height xpos ypos
  23  *   * Clear area
  24  * OPAQUE
  25  *   * Disable all alpha transparency!
  26  *      Send "ALPHA 0 0 0 0 0" to enable again!
  27  * HIDE
  28  *   * Hide bitmap
  29  * SHOW
  30  *   * Show bitmap
  31  *
  32  * Arguments are:
  33  * width, height    Size of image/area
  34  * xpos, ypos       Start blitting at X/Y position
  35  * alpha            Set alpha difference. 0 means same as original.
  36  *                  255 makes everything opaque
  37  *                  -255 makes everything transparent
  38  *                  If you set this to -255 you can then send a sequence of
  39  *                  ALPHA-commands to set the area to -225, -200, -175 etc
  40  *                  for a nice fade-in-effect! ;)
  41  * clear            Clear the framebuffer before blitting. 1 means clear.
  42  *                  If 0, the image will just be blitted on top of the old
  43  *                  one, so you don't need to send 1,8MB of RGBA32 data
  44  *                  everytime a small part of the screen is updated.
  45  *
  46  * Arguments for the filter are hidden:opaque:fifo
  47  * For example 1:0:/tmp/myfifo.fifo will start the filter hidden, transparent
  48  * and use /tmp/myfifo.fifo as the fifo.
  49  *
  50  * If you find bugs, please send me patches! ;)
  51  *
  52  * This filter was developed for use in Freevo (http://freevo.sf.net), but
  53  * anyone is free to use it! ;)
  54  *
  55  */
  56
  57 #include <stdio.h>
  58 #include <stdlib.h>
  59 #include <string.h>
  60 #include <unistd.h>
  61 #include <errno.h>
  62 #include <sys/stat.h>
  63 #include <sys/types.h>
  64 #include <sys/time.h>
  65 #include <fcntl.h>
  66 #include "config.h"
  67 #include "mp_image.h"
  68 #include "vf.h"
  69 #include "img_format.h"
  70
  71 #ifndef HAVE_NO_POSIX_SELECT
  72
  73 #include "mp_msg.h"
  74
  75 #include "libvo/fastmemcpy.h"
  76
  77 #define IS_RAWIMG       0x100
  78 #define IS_IMG          0x200
  79
  80 #define NONE            0x000
  81 #define IMG_RGBA32      0x101
  82 #define IMG_ABGR32      0x102
  83 #define IMG_RGB24       0x103
  84 #define IMG_BGR24       0x104
  85 #define IMG_PNG         0x201
  86 #define CMD_CLEAR       0x001
  87 #define CMD_ALPHA       0x002
  88
  89 #define TRUE  1
  90 #define FALSE 0
  91
  92 #define MAX(a,b) ((a) > (b) ? (a) : (b))
  93 #define MIN(a,b) ((a) < (b) ? (a) : (b))
  94 #define INRANGE(a,b,c)  ( ((a) < (b)) ? (b) : ( ((a) > (c)) ? (c) : (a) ) )
  95
  96 #define rgb2y(R,G,B)  ( (( 263*R + 516*G + 100*B) >> 10) + 16  )
  97 #define rgb2u(R,G,B)  ( ((-152*R - 298*G + 450*B) >> 10) + 128 )
  98 #define rgb2v(R,G,B)  ( (( 450*R - 376*G -  73*B) >> 10) + 128 )
  99
 100 #define DBG(a) (mp_msg(MSGT_VFILTER, MSGL_DBG2, "DEBUG: %d\n", a))
 101
 102 struct vf_priv_s {
 103     int w, h, x1, y1, x2, y2;
 104         struct {
 105                 unsigned char *y, *u, *v, *a, *oa;
 106         } bitmap;
 107     int stream_fd;
 108         fd_set stream_fdset;
 109         int opaque, hidden;
 110 };
 111
 112 static int
 113 query_format(struct vf_instance_s* vf, unsigned int fmt){
 114     if(fmt==IMGFMT_YV12) return VFCAP_CSP_SUPPORTED;
 115     return 0;
 116 }
 117
 118
 119 static int
 120 config(struct vf_instance_s* vf,
 121        int width, int height, int d_width, int d_height,
 122        unsigned int flags, unsigned int outfmt)
 123 {
 124         vf->priv->bitmap.y  = malloc( width*height );
 125         vf->priv->bitmap.u  = malloc( width*height/4 );
 126         vf->priv->bitmap.v  = malloc( width*height/4 );
 127         vf->priv->bitmap.a  = malloc( width*height );
 128         vf->priv->bitmap.oa = malloc( width*height );
 129         if(!( vf->priv->bitmap.y &&
 130               vf->priv->bitmap.u &&
 131                   vf->priv->bitmap.v &&
 132                   vf->priv->bitmap.a &&
 133                   vf->priv->bitmap.oa )) {
 134                 mp_msg(MSGT_VFILTER, MSGL_ERR, "vf_bmovl: Could not allocate memory for bitmap buffer: %s\n", strerror(errno) );
 135                 return FALSE;
 136         }
 137
 138         // Set default to black...
 139         memset( vf->priv->bitmap.u, 128, width*height/4 );
 140         memset( vf->priv->bitmap.v, 128, width*height/4 );
 141
 142     vf->priv->w  = vf->priv->x1 = width;
 143     vf->priv->h  = vf->priv->y1 = height;
 144     vf->priv->y2 = vf->priv->x2 = 0;
 145
 146     return vf_next_config(vf, width, height, d_width, d_height, flags, outfmt);
 147 }
 148
 149 static void
 150 uninit(struct vf_instance_s *vf)
 151 {
 152         if(vf->priv) {
 153                 free(vf->priv->bitmap.y);
 154                 free(vf->priv->bitmap.u);
 155                 free(vf->priv->bitmap.v);
 156                 free(vf->priv->bitmap.a);
 157                 free(vf->priv->bitmap.oa);
 158                 if (vf->priv->stream_fd >= 0)
 159                   close(vf->priv->stream_fd);
 160                 free(vf->priv);
 161         }
 162 }
 163
 164 static int
 165 _read_cmd(int fd, char *cmd, char *args) {
 166         int done=FALSE, pos=0;
 167         char tmp;
 168
 169         while(!done) {
 170                 if(! read( fd, &tmp, 1 ) ) return FALSE;
 171                 if( (tmp>='A' && tmp<='Z') || (tmp>='0' && tmp<='9') )
 172                         cmd[pos]=tmp;
 173                 else if(tmp == ' ') {
 174                         cmd[pos]='\0';
 175                         done=TRUE;
 176                 }
 177                 else if(tmp == '\n') {
 178                         cmd[pos]='\0';
 179                         args[0]='\0';
 180                         return TRUE;
 181                 }
 182                 if(pos++>20) {
 183                         cmd[0]='\0';
 184                         return TRUE;
 185                 }
 186         }
 187         done=FALSE; pos=0;
 188         while(!done) {
 189                 if(! read( fd, &tmp, 1 ) ) return FALSE;
 190                 if( (tmp >= ' ') && (pos<100) ) args[pos]=tmp;
 191                 else {
 192                         args[pos]='\0';
 193                         done=TRUE;
 194                 }
 195                 pos++;
 196         }
 197         return TRUE;
 198 }
 199
 200
 201 static int
 202 put_image(struct vf_instance_s* vf, mp_image_t* mpi, double pts){
 203         int buf_x=0, buf_y=0, buf_pos=0;
 204         int have, got, want;
 205         int xpos=0, ypos=0, pos=0;
 206         unsigned char red=0, green=0, blue=0;
 207         int  alpha;
 208         mp_image_t* dmpi;
 209
 210     dmpi = vf_get_image(vf->next, mpi->imgfmt, MP_IMGTYPE_TEMP,
 211                                                 MP_IMGFLAG_ACCEPT_STRIDE | MP_IMGFLAG_PREFER_ALIGNED_STRIDE,
 212                                                 mpi->w, mpi->h);
 213
 214         memcpy( dmpi->planes[0], mpi->planes[0], mpi->stride[0] * mpi->height);
 215         memcpy( dmpi->planes[1], mpi->planes[1], mpi->stride[1] * mpi->chroma_height);
 216         memcpy( dmpi->planes[2], mpi->planes[2], mpi->stride[2] * mpi->chroma_height);
 217
 218     if(vf->priv->stream_fd >= 0) {
 219                 struct timeval tv;
 220                 int ready;
 221
 222                 FD_SET( vf->priv->stream_fd, &vf->priv->stream_fdset );
 223                 tv.tv_sec=0; tv.tv_usec=0;
 224
 225                 ready = select( vf->priv->stream_fd+1, &vf->priv->stream_fdset, NULL, NULL, &tv );
 226                 if(ready > 0) {
 227                         // We've got new data from the FIFO
 228
 229                         char cmd[20], args[100];
 230                         int  imgw,imgh,imgx,imgy,clear,imgalpha,pxsz=1,command;
 231                         unsigned char *buffer = NULL;
 232
 233                         if(! _read_cmd( vf->priv->stream_fd, cmd, args) ) {
 234                                 mp_msg(MSGT_VFILTER, MSGL_ERR, "\nvf_bmovl: Error reading commands: %s\n\n", strerror(errno));
 235                                 return FALSE;
 236                         }
 237                         mp_msg(MSGT_VFILTER, MSGL_DBG2, "\nDEBUG: Got: %s+%s\n", cmd, args);
 238
 239                         command=NONE;
 240                         if     ( strncmp(cmd,"RGBA32",6)==0 ) { pxsz=4; command = IMG_RGBA32; }
 241                         else if( strncmp(cmd,"ABGR32",6)==0 ) { pxsz=4; command = IMG_ABGR32; }
 242                         else if( strncmp(cmd,"RGB24" ,5)==0 ) { pxsz=3; command = IMG_RGB24;  }
 243                         else if( strncmp(cmd,"BGR24" ,5)==0 ) { pxsz=3; command = IMG_BGR24;  }
 244                         else if( strncmp(cmd,"CLEAR" ,5)==0 ) { pxsz=1; command = CMD_CLEAR;  }
 245                         else if( strncmp(cmd,"ALPHA" ,5)==0 ) { pxsz=1; command = CMD_ALPHA;  }
 246                         else if( strncmp(cmd,"OPAQUE",6)==0 ) vf->priv->opaque=TRUE;
 247                         else if( strncmp(cmd,"SHOW",  4)==0 ) vf->priv->hidden=FALSE;
 248                         else if( strncmp(cmd,"HIDE",  4)==0 ) vf->priv->hidden=TRUE;
 249                         else if( strncmp(cmd,"FLUSH" ,5)==0 ) return vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
 250                         else {
 251                             mp_msg(MSGT_VFILTER, MSGL_WARN, "\nvf_bmovl: Unknown command: '%s'. Ignoring.\n", cmd);
 252                             return vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
 253                         }
 254
 255                         if(command == CMD_ALPHA) {
 256                                 sscanf( args, "%d %d %d %d %d", &imgw, &imgh, &imgx, &imgy, &imgalpha);
 257                                 mp_msg(MSGT_VFILTER, MSGL_DBG2, "\nDEBUG: ALPHA: %d %d %d %d %d\n\n",
 258                                         imgw, imgh, imgx, imgy, imgalpha);
 259                                 if(imgw==0 && imgh==0) vf->priv->opaque=FALSE;
 260                         }
 261
 262                         if(command & IS_RAWIMG) {
 263                                 sscanf( args, "%d %d %d %d %d %d",
 264                                         &imgw, &imgh, &imgx, &imgy, &imgalpha, &clear);
 265                                 mp_msg(MSGT_VFILTER, MSGL_DBG2, "\nDEBUG: RAWIMG: %d %d %d %d %d %d\n\n",
 266                                         imgw, imgh, imgx, imgy, imgalpha, clear);
 267
 268                             buffer = malloc(imgw*imgh*pxsz);
 269                             if(!buffer) {
 270                                 mp_msg(MSGT_VFILTER, MSGL_WARN, "\nvf_bmovl: Couldn't allocate temporary buffer! Skipping...\n\n");
 271                                         return vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
 272                             }
 273                                 /* pipes/sockets might need multiple calls to read(): */
 274                             want = (imgw*imgh*pxsz);
 275                             have = 0;
 276                             while (have < want) {
 277                                 got = read( vf->priv->stream_fd, buffer+have, want-have );
 278                                 if (got == 0) {
 279                                     mp_msg(MSGT_VFILTER, MSGL_WARN, "\nvf_bmovl: premature EOF...\n\n");
 280                                     break;
 281                                 }
 282                                 if (got < 0) {
 283                                     mp_msg(MSGT_VFILTER, MSGL_WARN, "\nvf_bmovl: read error: %s\n\n", strerror(errno));
 284                                     break;
 285                                 }
 286                                 have += got;
 287                             }
 288                             mp_msg(MSGT_VFILTER, MSGL_DBG2, "Got %d bytes... (wanted %d)\n", have, want );
 289
 290                                 if(clear) {
 291                                         memset( vf->priv->bitmap.y,   0, vf->priv->w*vf->priv->h );
 292                                         memset( vf->priv->bitmap.u, 128, vf->priv->w*vf->priv->h/4 );
 293                                         memset( vf->priv->bitmap.v, 128, vf->priv->w*vf->priv->h/4 );
 294                                         memset( vf->priv->bitmap.a,   0, vf->priv->w*vf->priv->h );
 295                                         memset( vf->priv->bitmap.oa,  0, vf->priv->w*vf->priv->h );
 296                                         vf->priv->x1 = dmpi->width;
 297                                         vf->priv->y1 = dmpi->height;
 298                                         vf->priv->x2 = vf->priv->y2 = 0;
 299                                 }
 300                                 // Define how much of our bitmap that contains graphics!
 301                                 vf->priv->x1 = MAX( 0, MIN(vf->priv->x1, imgx) );
 302                                 vf->priv->y1 = MAX( 0, MIN(vf->priv->y1, imgy) );
 303                                 vf->priv->x2 = MIN( vf->priv->w, MAX(vf->priv->x2, ( imgx + imgw)) );
 304                                 vf->priv->y2 = MIN( vf->priv->h, MAX(vf->priv->y2, ( imgy + imgh)) );
 305                         }
 306
 307                         if( command == CMD_CLEAR ) {
 308                                 sscanf( args, "%d %d %d %d", &imgw, &imgh, &imgx, &imgy);
 309                                 mp_msg(MSGT_VFILTER, MSGL_DBG2, "\nDEBUG: CLEAR: %d %d %d %d\n\n", imgw, imgh, imgx, imgy);
 310
 311                                 for( ypos=imgy ; (ypos < (imgy+imgh)) && (ypos < vf->priv->y2) ; ypos++ ) {
 312                                         memset( vf->priv->bitmap.y  + (ypos*vf->priv->w) + imgx, 0, imgw );
 313                                         memset( vf->priv->bitmap.a  + (ypos*vf->priv->w) + imgx, 0, imgw );
 314                                         memset( vf->priv->bitmap.oa + (ypos*vf->priv->w) + imgx, 0, imgw );
 315                                         if(ypos%2) {
 316                                                 memset( vf->priv->bitmap.u + ((ypos/2)*dmpi->stride[1]) + (imgx/2), 128, imgw/2 );
 317                                                 memset( vf->priv->bitmap.v + ((ypos/2)*dmpi->stride[2]) + (imgx/2), 128, imgw/2 );
 318                                         }
 319                                 }       // Recalculate area that contains graphics
 320                                 if( (imgx <= vf->priv->x1) && ( (imgw+imgx) >= vf->priv->x2) ) {
 321                                         if( (imgy <= vf->priv->y1) && ( (imgy+imgh) >= vf->priv->y1) )
 322                                                 vf->priv->y1 = imgy+imgh;
 323                                         if( (imgy <= vf->priv->y2) && ( (imgy+imgh) >= vf->priv->y2) )
 324                                                 vf->priv->y2 = imgy;
 325                                 }
 326                                 if( (imgy <= vf->priv->y1) && ( (imgy+imgh) >= vf->priv->y2) ) {
 327                                         if( (imgx <= vf->priv->x1) && ( (imgx+imgw) >= vf->priv->x1) )
 328                                                 vf->priv->x1 = imgx+imgw;
 329                                         if( (imgx <= vf->priv->x2) && ( (imgx+imgw) >= vf->priv->x2) )
 330                                                 vf->priv->x2 = imgx;
 331                                 }
 332                                 return vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
 333                         }
 334
 335                         for( buf_y=0 ; (buf_y < imgh) && (buf_y < (vf->priv->h-imgy)) ; buf_y++ ) {
 336                             for( buf_x=0 ; (buf_x < (imgw*pxsz)) && (buf_x < ((vf->priv->w+imgx)*pxsz)) ; buf_x += pxsz ) {
 337                                         if(command & IS_RAWIMG) buf_pos = (buf_y * imgw * pxsz) + buf_x;
 338                                         pos = ((buf_y+imgy) * vf->priv->w) + ((buf_x/pxsz)+imgx);
 339
 340                                         switch(command) {
 341                                                 case IMG_RGBA32:
 342                                                         red   = buffer[buf_pos+0];
 343                                                         green = buffer[buf_pos+1];
 344                                                         blue  = buffer[buf_pos+2];
 345                                                         alpha = buffer[buf_pos+3];
 346                                                         break;
 347                                                 case IMG_ABGR32:
 348                                                         alpha = buffer[buf_pos+0];
 349                                                         blue  = buffer[buf_pos+1];
 350                                                         green = buffer[buf_pos+2];
 351                                                         red   = buffer[buf_pos+3];
 352                                                         break;
 353                                                 case IMG_RGB24:
 354                                                         red   = buffer[buf_pos+0];
 355                                                         green = buffer[buf_pos+1];
 356                                                         blue  = buffer[buf_pos+2];
 357                                                         alpha = 0xFF;
 358                                                 break;
 359                                                 case IMG_BGR24:
 360                                                         blue  = buffer[buf_pos+0];
 361                                                         green = buffer[buf_pos+1];
 362                                                         red   = buffer[buf_pos+2];
 363                                                         alpha = 0xFF;
 364                                                 break;
 365                                                 case CMD_ALPHA:
 366                                                         vf->priv->bitmap.a[pos] = INRANGE((vf->priv->bitmap.oa[pos]+imgalpha),0,255);
 367                                                         break;
 368                                                 default:
 369                                                         mp_msg(MSGT_VFILTER, MSGL_ERR, "vf_bmovl: Internal error!\n");
 370                                                         return FALSE;
 371                                         }
 372                                         if( command & IS_RAWIMG ) {
 373                                                 vf->priv->bitmap.y[pos]  = rgb2y(red,green,blue);
 374                                                 vf->priv->bitmap.oa[pos] = alpha;
 375                                                 vf->priv->bitmap.a[pos]  = INRANGE((alpha+imgalpha),0,255);
 376                                                 if((buf_y%2) && ((buf_x/pxsz)%2)) {
 377                                                         pos = ( ((buf_y+imgy)/2) * dmpi->stride[1] ) + (((buf_x/pxsz)+imgx)/2);
 378                                                         vf->priv->bitmap.u[pos] = rgb2u(red,green,blue);
 379                                                         vf->priv->bitmap.v[pos] = rgb2v(red,green,blue);
 380                                                 }
 381                                         }
 382                                 } // for buf_x
 383                         } // for buf_y
 384                         free (buffer);
 385                 } else if(ready < 0) {
 386                         mp_msg(MSGT_VFILTER, MSGL_WARN, "\nvf_bmovl: Error %d in fifo: %s\n\n", errno, strerror(errno));
 387                 }
 388     }
 389
 390         if(vf->priv->hidden) return vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
 391
 392         if(vf->priv->opaque) {  // Just copy buffer memory to screen
 393                 for( ypos=vf->priv->y1 ; ypos < vf->priv->y2 ; ypos++ ) {
 394                         memcpy( dmpi->planes[0] + (ypos*dmpi->stride[0]) + vf->priv->x1,
 395                                 vf->priv->bitmap.y + (ypos*vf->priv->w) + vf->priv->x1,
 396                                         vf->priv->x2 - vf->priv->x1 );
 397                         if(ypos%2) {
 398                                 memcpy( dmpi->planes[1] + ((ypos/2)*dmpi->stride[1]) + (vf->priv->x1/2),
 399                                         vf->priv->bitmap.u + (((ypos/2)*(vf->priv->w)/2)) + (vf->priv->x1/2),
 400                                         (vf->priv->x2 - vf->priv->x1)/2 );
 401                                 memcpy( dmpi->planes[2] + ((ypos/2)*dmpi->stride[2]) + (vf->priv->x1/2),
 402                                         vf->priv->bitmap.v + (((ypos/2)*(vf->priv->w)/2)) + (vf->priv->x1/2),
 403                                         (vf->priv->x2 - vf->priv->x1)/2 );
 404                         }
 405                 }
 406         } else { // Blit the bitmap to the videoscreen, pixel for pixel
 407             for( ypos=vf->priv->y1 ; ypos < vf->priv->y2 ; ypos++ ) {
 408                 for ( xpos=vf->priv->x1 ; xpos < vf->priv->x2 ; xpos++ ) {
 409                                 pos = (ypos * dmpi->stride[0]) + xpos;
 410
 411                                 alpha = vf->priv->bitmap.a[pos];
 412
 413                                 if (alpha == 0) continue; // Completly transparent pixel
 414
 415                                 if (alpha == 255) {     // Opaque pixel
 416                                         dmpi->planes[0][pos] = vf->priv->bitmap.y[pos];
 417                                         if ((ypos%2) && (xpos%2)) {
 418                                                 pos = ( (ypos/2) * dmpi->stride[1] ) + (xpos/2);
 419                                                 dmpi->planes[1][pos] = vf->priv->bitmap.u[pos];
 420                                                 dmpi->planes[2][pos] = vf->priv->bitmap.v[pos];
 421                                         }
 422                                 } else { // Alphablended pixel
 423                                         dmpi->planes[0][pos] =
 424                                                 ((255 - alpha) * (int)dmpi->planes[0][pos] +
 425                                                 alpha * (int)vf->priv->bitmap.y[pos]) >> 8;
 426
 427                                         if ((ypos%2) && (xpos%2)) {
 428                                                 pos = ( (ypos/2) * dmpi->stride[1] ) + (xpos/2);
 429
 430                                                 dmpi->planes[1][pos] =
 431                                                         ((255 - alpha) * (int)dmpi->planes[1][pos] +
 432                                                         alpha * (int)vf->priv->bitmap.u[pos]) >> 8;
 433
 434                                                 dmpi->planes[2][pos] =
 435                                                         ((255 - alpha) * (int)dmpi->planes[2][pos] +
 436                                                         alpha * (int)vf->priv->bitmap.v[pos]) >> 8;
 437                                         }
 438                             }
 439                         } // for xpos
 440                 } // for ypos
 441         } // if !opaque
 442     return vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
 443 } // put_image
 444
 445 static int
 446 vf_open(vf_instance_t* vf, char* args)
 447 {
 448     char filename[1000];
 449
 450     vf->config = config;
 451     vf->put_image = put_image;
 452     vf->query_format = query_format;
 453         vf->uninit = uninit;
 454
 455     vf->priv = malloc(sizeof(struct vf_priv_s));
 456
 457         if(!args || sscanf(args, "%d:%d:%s", &vf->priv->hidden, &vf->priv->opaque, filename) < 3 ) {
 458         mp_msg(MSGT_VFILTER, MSGL_ERR, "vf_bmovl: Bad arguments!\n");
 459                 mp_msg(MSGT_VFILTER, MSGL_ERR, "vf_bmovl: Arguments are 'bool hidden:bool opaque:string fifo'\n");
 460                 return FALSE;
 461     }
 462
 463     vf->priv->stream_fd = open(filename, O_RDWR);
 464     if(vf->priv->stream_fd >= 0) {
 465                 FD_ZERO( &vf->priv->stream_fdset );
 466                 mp_msg(MSGT_VFILTER, MSGL_INFO, "vf_bmovl: Opened fifo %s as FD %d\n", filename, vf->priv->stream_fd);
 467         } else {
 468                 mp_msg(MSGT_VFILTER, MSGL_WARN, "vf_bmovl: Error! Couldn't open FIFO %s: %s\n", filename, strerror(errno));
 469                 vf->priv->stream_fd = -1;
 470     }
 471
 472     return TRUE;
 473 }
 474
 475 vf_info_t vf_info_bmovl = {
 476     "Read bitmaps from a FIFO and display them in window",
 477     "bmovl",
 478     "Per Wigren",
 479     "",
 480     vf_open,
 481     NULL
 482 };
 483
 484 #endif