libmpcodecs/vf_bmovl.c

   1 /*
   2  * BitMap OVerLay video filter for MPlayer
   3  *
   4  * (C) 2002 Per Wigren <wigren@home.se>
   5  *
   6  * This file is part of MPlayer.
   7  *
   8  * MPlayer is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * MPlayer is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  */
  22
  23 /*
  24  * Use MPlayer as a framebuffer to read bitmaps and commands from a FIFO
  25  * and display them in the window.
  26  *
  27  * Commands are:
  28  *
  29  * RGBA32 width height xpos ypos alpha clear
  30  *   * Followed by width*height*4 bytes of raw RGBA32 data.
  31  * ABGR32 width height xpos ypos alpha clear
  32  *   * Followed by width*height*4 bytes of raw ABGR32 data.
  33  * RGB24 width height xpos ypos alpha clear
  34  *   * Followed by width*height*3 bytes of raw RGB32 data.
  35  * BGR24 width height xpos ypos alpha clear
  36  *   * Followed by width*height*3 bytes of raw BGR32 data.
  37  *
  38  * ALPHA width height xpos ypos alpha
  39  *   * Change alpha for area
  40  * CLEAR width height xpos ypos
  41  *   * Clear area
  42  * OPAQUE
  43  *   * Disable all alpha transparency!
  44  *      Send "ALPHA 0 0 0 0 0" to enable again!
  45  * HIDE
  46  *   * Hide bitmap
  47  * SHOW
  48  *   * Show bitmap
  49  *
  50  * Arguments are:
  51  * width, height    Size of image/area
  52  * xpos, ypos       Start blitting at X/Y position
  53  * alpha            Set alpha difference. 0 means same as original.
  54  *                  255 makes everything opaque
  55  *                  -255 makes everything transparent
  56  *                  If you set this to -255 you can then send a sequence of
  57  *                  ALPHA-commands to set the area to -225, -200, -175 etc
  58  *                  for a nice fade-in-effect! ;)
  59  * clear            Clear the framebuffer before blitting. 1 means clear.
  60  *                  If 0, the image will just be blitted on top of the old
  61  *                  one, so you don't need to send 1,8MB of RGBA32 data
  62  *                  everytime a small part of the screen is updated.
  63  *
  64  * Arguments for the filter are hidden:opaque:fifo
  65  * For example 1:0:/tmp/myfifo.fifo will start the filter hidden, transparent
  66  * and use /tmp/myfifo.fifo as the fifo.
  67  *
  68  * If you find bugs, please send me patches! ;)
  69  *
  70  * This filter was developed for use in Freevo (http://freevo.sf.net), but
  71  * anyone is free to use it! ;)
  72  *
  73  */
  74
  75 #include <stdio.h>
  76 #include <stdlib.h>
  77 #include <string.h>
  78 #include <unistd.h>
  79 #include <errno.h>
  80 #include <sys/stat.h>
  81 #include <sys/types.h>
  82 #include <sys/time.h>
  83 #include <fcntl.h>
  84 #include "config.h"
  85 #include "mp_image.h"
  86 #include "vf.h"
  87 #include "img_format.h"
  88
  89 #include "mp_msg.h"
  90 #include "libavutil/common.h"
  91
  92 #include "libvo/fastmemcpy.h"
  93
  94 #define IS_RAWIMG       0x100
  95 #define IS_IMG          0x200
  96
  97 #define NONE            0x000
  98 #define IMG_RGBA32      0x101
  99 #define IMG_ABGR32      0x102
 100 #define IMG_RGB24       0x103
 101 #define IMG_BGR24       0x104
 102 #define IMG_PNG         0x201
 103 #define CMD_CLEAR       0x001
 104 #define CMD_ALPHA       0x002
 105
 106 #define TRUE  1
 107 #define FALSE 0
 108
 109 #define INRANGE(a,b,c)  ( ((a) < (b)) ? (b) : ( ((a) > (c)) ? (c) : (a) ) )
 110
 111 #define rgb2y(R,G,B)  ( (( 263*R + 516*G + 100*B) >> 10) + 16  )
 112 #define rgb2u(R,G,B)  ( ((-152*R - 298*G + 450*B) >> 10) + 128 )
 113 #define rgb2v(R,G,B)  ( (( 450*R - 376*G -  73*B) >> 10) + 128 )
 114
 115 #define DBG(a) (mp_msg(MSGT_VFILTER, MSGL_DBG2, "DEBUG: %d\n", a))
 116
 117 struct vf_priv_s {
 118     int w, h, x1, y1, x2, y2;
 119         struct {
 120                 unsigned char *y, *u, *v, *a, *oa;
 121         } bitmap;
 122     int stream_fd;
 123         fd_set stream_fdset;
 124         int opaque, hidden;
 125 };
 126
 127 static int
 128 query_format(struct vf_instance* vf, unsigned int fmt){
 129     if(fmt==IMGFMT_YV12) return VFCAP_CSP_SUPPORTED;
 130     return 0;
 131 }
 132
 133
 134 static int
 135 config(struct vf_instance* vf,
 136        int width, int height, int d_width, int d_height,
 137        unsigned int flags, unsigned int outfmt)
 138 {
 139         vf->priv->bitmap.y  = malloc( width*height );
 140         vf->priv->bitmap.u  = malloc( width*height/4 );
 141         vf->priv->bitmap.v  = malloc( width*height/4 );
 142         vf->priv->bitmap.a  = malloc( width*height );
 143         vf->priv->bitmap.oa = malloc( width*height );
 144         if(!( vf->priv->bitmap.y &&
 145               vf->priv->bitmap.u &&
 146                   vf->priv->bitmap.v &&
 147                   vf->priv->bitmap.a &&
 148                   vf->priv->bitmap.oa )) {
 149                 mp_msg(MSGT_VFILTER, MSGL_ERR, "vf_bmovl: Could not allocate memory for bitmap buffer: %s\n", strerror(errno) );
 150                 return FALSE;
 151         }
 152
 153         // Set default to black...
 154         memset( vf->priv->bitmap.u, 128, width*height/4 );
 155         memset( vf->priv->bitmap.v, 128, width*height/4 );
 156
 157     vf->priv->w  = vf->priv->x1 = width;
 158     vf->priv->h  = vf->priv->y1 = height;
 159     vf->priv->y2 = vf->priv->x2 = 0;
 160
 161     return vf_next_config(vf, width, height, d_width, d_height, flags, outfmt);
 162 }
 163
 164 static void
 165 uninit(struct vf_instance *vf)
 166 {
 167         if(vf->priv) {
 168                 free(vf->priv->bitmap.y);
 169                 free(vf->priv->bitmap.u);
 170                 free(vf->priv->bitmap.v);
 171                 free(vf->priv->bitmap.a);
 172                 free(vf->priv->bitmap.oa);
 173                 if (vf->priv->stream_fd >= 0)
 174                   close(vf->priv->stream_fd);
 175                 free(vf->priv);
 176         }
 177 }
 178
 179 static int
 180 _read_cmd(int fd, char *cmd, char *args) {
 181         int done=FALSE, pos=0;
 182         char tmp;
 183
 184         while(!done) {
 185                 if(! read( fd, &tmp, 1 ) ) return FALSE;
 186                 if( (tmp>='A' && tmp<='Z') || (tmp>='0' && tmp<='9') )
 187                         cmd[pos]=tmp;
 188                 else if(tmp == ' ') {
 189                         cmd[pos]='\0';
 190                         done=TRUE;
 191                 }
 192                 else if(tmp == '\n') {
 193                         cmd[pos]='\0';
 194                         args[0]='\0';
 195                         return TRUE;
 196                 }
 197                 if(pos++>20) {
 198                         cmd[0]='\0';
 199                         return TRUE;
 200                 }
 201         }
 202         done=FALSE; pos=0;
 203         while(!done) {
 204                 if(! read( fd, &tmp, 1 ) ) return FALSE;
 205                 if( (tmp >= ' ') && (pos<100) ) args[pos]=tmp;
 206                 else {
 207                         args[pos]='\0';
 208                         done=TRUE;
 209                 }
 210                 pos++;
 211         }
 212         return TRUE;
 213 }
 214
 215
 216 static int
 217 put_image(struct vf_instance* vf, mp_image_t* mpi, double pts){
 218         int buf_x=0, buf_y=0, buf_pos=0;
 219         int have, got, want;
 220         int xpos=0, ypos=0, pos=0;
 221         unsigned char red=0, green=0, blue=0;
 222         int  alpha;
 223         mp_image_t* dmpi;
 224
 225     dmpi = vf_get_image(vf->next, mpi->imgfmt, MP_IMGTYPE_TEMP,
 226                                                 MP_IMGFLAG_ACCEPT_STRIDE | MP_IMGFLAG_PREFER_ALIGNED_STRIDE,
 227                                                 mpi->w, mpi->h);
 228
 229     memcpy_pic( dmpi->planes[0], mpi->planes[0], mpi->width, mpi->height, dmpi->stride[0], mpi->stride[0] );
 230     memcpy_pic( dmpi->planes[1], mpi->planes[1], mpi->chroma_width, mpi->chroma_height, dmpi->stride[1], mpi->stride[1] );
 231     memcpy_pic( dmpi->planes[2], mpi->planes[2], mpi->chroma_width, mpi->chroma_height, dmpi->stride[2], mpi->stride[2] );
 232
 233     if(vf->priv->stream_fd >= 0) {
 234                 struct timeval tv;
 235                 int ready;
 236
 237                 FD_SET( vf->priv->stream_fd, &vf->priv->stream_fdset );
 238                 tv.tv_sec=0; tv.tv_usec=0;
 239
 240                 ready = select( vf->priv->stream_fd+1, &vf->priv->stream_fdset, NULL, NULL, &tv );
 241                 if(ready > 0) {
 242                         // We've got new data from the FIFO
 243
 244                         char cmd[20], args[100];
 245                         int  imgw,imgh,imgx,imgy,clear,imgalpha,pxsz=1,command;
 246                         unsigned char *buffer = NULL;
 247
 248                         if(! _read_cmd( vf->priv->stream_fd, cmd, args) ) {
 249                                 mp_msg(MSGT_VFILTER, MSGL_ERR, "\nvf_bmovl: Error reading commands: %s\n\n", strerror(errno));
 250                                 return FALSE;
 251                         }
 252                         mp_msg(MSGT_VFILTER, MSGL_DBG2, "\nDEBUG: Got: %s+%s\n", cmd, args);
 253
 254                         command=NONE;
 255                         if     ( strncmp(cmd,"RGBA32",6)==0 ) { pxsz=4; command = IMG_RGBA32; }
 256                         else if( strncmp(cmd,"ABGR32",6)==0 ) { pxsz=4; command = IMG_ABGR32; }
 257                         else if( strncmp(cmd,"RGB24" ,5)==0 ) { pxsz=3; command = IMG_RGB24;  }
 258                         else if( strncmp(cmd,"BGR24" ,5)==0 ) { pxsz=3; command = IMG_BGR24;  }
 259                         else if( strncmp(cmd,"CLEAR" ,5)==0 ) { pxsz=1; command = CMD_CLEAR;  }
 260                         else if( strncmp(cmd,"ALPHA" ,5)==0 ) { pxsz=1; command = CMD_ALPHA;  }
 261                         else if( strncmp(cmd,"OPAQUE",6)==0 ) vf->priv->opaque=TRUE;
 262                         else if( strncmp(cmd,"SHOW",  4)==0 ) vf->priv->hidden=FALSE;
 263                         else if( strncmp(cmd,"HIDE",  4)==0 ) vf->priv->hidden=TRUE;
 264                         else if( strncmp(cmd,"FLUSH" ,5)==0 ) return vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
 265                         else {
 266                             mp_msg(MSGT_VFILTER, MSGL_WARN, "\nvf_bmovl: Unknown command: '%s'. Ignoring.\n", cmd);
 267                             return vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
 268                         }
 269
 270                         if(command == CMD_ALPHA) {
 271                                 sscanf( args, "%d %d %d %d %d", &imgw, &imgh, &imgx, &imgy, &imgalpha);
 272                                 mp_msg(MSGT_VFILTER, MSGL_DBG2, "\nDEBUG: ALPHA: %d %d %d %d %d\n\n",
 273                                         imgw, imgh, imgx, imgy, imgalpha);
 274                                 if(imgw==0 && imgh==0) vf->priv->opaque=FALSE;
 275                         }
 276
 277                         if(command & IS_RAWIMG) {
 278                                 sscanf( args, "%d %d %d %d %d %d",
 279                                         &imgw, &imgh, &imgx, &imgy, &imgalpha, &clear);
 280                                 mp_msg(MSGT_VFILTER, MSGL_DBG2, "\nDEBUG: RAWIMG: %d %d %d %d %d %d\n\n",
 281                                         imgw, imgh, imgx, imgy, imgalpha, clear);
 282
 283                             buffer = malloc(imgw*imgh*pxsz);
 284                             if(!buffer) {
 285                                 mp_msg(MSGT_VFILTER, MSGL_WARN, "\nvf_bmovl: Couldn't allocate temporary buffer! Skipping...\n\n");
 286                                         return vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
 287                             }
 288                                 /* pipes/sockets might need multiple calls to read(): */
 289                             want = (imgw*imgh*pxsz);
 290                             have = 0;
 291                             while (have < want) {
 292                                 got = read( vf->priv->stream_fd, buffer+have, want-have );
 293                                 if (got == 0) {
 294                                     mp_msg(MSGT_VFILTER, MSGL_WARN, "\nvf_bmovl: premature EOF...\n\n");
 295                                     break;
 296                                 }
 297                                 if (got < 0) {
 298                                     mp_msg(MSGT_VFILTER, MSGL_WARN, "\nvf_bmovl: read error: %s\n\n", strerror(errno));
 299                                     break;
 300                                 }
 301                                 have += got;
 302                             }
 303                             mp_msg(MSGT_VFILTER, MSGL_DBG2, "Got %d bytes... (wanted %d)\n", have, want );
 304
 305                                 if(clear) {
 306                                         memset( vf->priv->bitmap.y,   0, vf->priv->w*vf->priv->h );
 307                                         memset( vf->priv->bitmap.u, 128, vf->priv->w*vf->priv->h/4 );
 308                                         memset( vf->priv->bitmap.v, 128, vf->priv->w*vf->priv->h/4 );
 309                                         memset( vf->priv->bitmap.a,   0, vf->priv->w*vf->priv->h );
 310                                         memset( vf->priv->bitmap.oa,  0, vf->priv->w*vf->priv->h );
 311                                         vf->priv->x1 = dmpi->width;
 312                                         vf->priv->y1 = dmpi->height;
 313                                         vf->priv->x2 = vf->priv->y2 = 0;
 314                                 }
 315                                 // Define how much of our bitmap that contains graphics!
 316                                 vf->priv->x1 = av_clip(imgx, 0, vf->priv->x1);
 317                                 vf->priv->y1 = av_clip(imgy, 0, vf->priv->y1);
 318                                 vf->priv->x2 = av_clip(imgx + imgw, vf->priv->x2, vf->priv->w);
 319                                 vf->priv->y2 = av_clip(imgy + imgh, vf->priv->y2, vf->priv->h);
 320                         }
 321
 322                         if( command == CMD_CLEAR ) {
 323                                 sscanf( args, "%d %d %d %d", &imgw, &imgh, &imgx, &imgy);
 324                                 mp_msg(MSGT_VFILTER, MSGL_DBG2, "\nDEBUG: CLEAR: %d %d %d %d\n\n", imgw, imgh, imgx, imgy);
 325
 326                                 for( ypos=imgy ; (ypos < (imgy+imgh)) && (ypos < vf->priv->y2) ; ypos++ ) {
 327                                         memset( vf->priv->bitmap.y  + (ypos*vf->priv->w) + imgx, 0, imgw );
 328                                         memset( vf->priv->bitmap.a  + (ypos*vf->priv->w) + imgx, 0, imgw );
 329                                         memset( vf->priv->bitmap.oa + (ypos*vf->priv->w) + imgx, 0, imgw );
 330                                         if(ypos%2) {
 331                                                 memset( vf->priv->bitmap.u + ((ypos/2)*dmpi->stride[1]) + (imgx/2), 128, imgw/2 );
 332                                                 memset( vf->priv->bitmap.v + ((ypos/2)*dmpi->stride[2]) + (imgx/2), 128, imgw/2 );
 333                                         }
 334                                 }       // Recalculate area that contains graphics
 335                                 if( (imgx <= vf->priv->x1) && ( (imgw+imgx) >= vf->priv->x2) ) {
 336                                         if( (imgy <= vf->priv->y1) && ( (imgy+imgh) >= vf->priv->y1) )
 337                                                 vf->priv->y1 = imgy+imgh;
 338                                         if( (imgy <= vf->priv->y2) && ( (imgy+imgh) >= vf->priv->y2) )
 339                                                 vf->priv->y2 = imgy;
 340                                 }
 341                                 if( (imgy <= vf->priv->y1) && ( (imgy+imgh) >= vf->priv->y2) ) {
 342                                         if( (imgx <= vf->priv->x1) && ( (imgx+imgw) >= vf->priv->x1) )
 343                                                 vf->priv->x1 = imgx+imgw;
 344                                         if( (imgx <= vf->priv->x2) && ( (imgx+imgw) >= vf->priv->x2) )
 345                                                 vf->priv->x2 = imgx;
 346                                 }
 347                                 return vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
 348                         }
 349
 350                         for( buf_y=0 ; (buf_y < imgh) && (buf_y < (vf->priv->h-imgy)) ; buf_y++ ) {
 351                             for( buf_x=0 ; (buf_x < (imgw*pxsz)) && (buf_x < ((vf->priv->w+imgx)*pxsz)) ; buf_x += pxsz ) {
 352                                         if(command & IS_RAWIMG) buf_pos = (buf_y * imgw * pxsz) + buf_x;
 353                                         pos = ((buf_y+imgy) * vf->priv->w) + ((buf_x/pxsz)+imgx);
 354
 355                                         switch(command) {
 356                                                 case IMG_RGBA32:
 357                                                         red   = buffer[buf_pos+0];
 358                                                         green = buffer[buf_pos+1];
 359                                                         blue  = buffer[buf_pos+2];
 360                                                         alpha = buffer[buf_pos+3];
 361                                                         break;
 362                                                 case IMG_ABGR32:
 363                                                         alpha = buffer[buf_pos+0];
 364                                                         blue  = buffer[buf_pos+1];
 365                                                         green = buffer[buf_pos+2];
 366                                                         red   = buffer[buf_pos+3];
 367                                                         break;
 368                                                 case IMG_RGB24:
 369                                                         red   = buffer[buf_pos+0];
 370                                                         green = buffer[buf_pos+1];
 371                                                         blue  = buffer[buf_pos+2];
 372                                                         alpha = 0xFF;
 373                                                 break;
 374                                                 case IMG_BGR24:
 375                                                         blue  = buffer[buf_pos+0];
 376                                                         green = buffer[buf_pos+1];
 377                                                         red   = buffer[buf_pos+2];
 378                                                         alpha = 0xFF;
 379                                                 break;
 380                                                 case CMD_ALPHA:
 381                                                         vf->priv->bitmap.a[pos] = INRANGE((vf->priv->bitmap.oa[pos]+imgalpha),0,255);
 382                                                         break;
 383                                                 default:
 384                                                         mp_msg(MSGT_VFILTER, MSGL_ERR, "vf_bmovl: Internal error!\n");
 385                                                         return FALSE;
 386                                         }
 387                                         if( command & IS_RAWIMG ) {
 388                                                 vf->priv->bitmap.y[pos]  = rgb2y(red,green,blue);
 389                                                 vf->priv->bitmap.oa[pos] = alpha;
 390                                                 vf->priv->bitmap.a[pos]  = INRANGE((alpha+imgalpha),0,255);
 391                                                 if((buf_y%2) && ((buf_x/pxsz)%2)) {
 392                                                         pos = ( ((buf_y+imgy)/2) * dmpi->stride[1] ) + (((buf_x/pxsz)+imgx)/2);
 393                                                         vf->priv->bitmap.u[pos] = rgb2u(red,green,blue);
 394                                                         vf->priv->bitmap.v[pos] = rgb2v(red,green,blue);
 395                                                 }
 396                                         }
 397                                 } // for buf_x
 398                         } // for buf_y
 399                         free (buffer);
 400                 } else if(ready < 0) {
 401                         mp_msg(MSGT_VFILTER, MSGL_WARN, "\nvf_bmovl: Error %d in fifo: %s\n\n", errno, strerror(errno));
 402                 }
 403     }
 404
 405         if(vf->priv->hidden) return vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
 406
 407         if(vf->priv->opaque) {  // Just copy buffer memory to screen
 408                 for( ypos=vf->priv->y1 ; ypos < vf->priv->y2 ; ypos++ ) {
 409                         fast_memcpy( dmpi->planes[0] + (ypos*dmpi->stride[0]) + vf->priv->x1,
 410                                 vf->priv->bitmap.y + (ypos*vf->priv->w) + vf->priv->x1,
 411                                         vf->priv->x2 - vf->priv->x1 );
 412                         if(ypos%2) {
 413                                 fast_memcpy( dmpi->planes[1] + ((ypos/2)*dmpi->stride[1]) + (vf->priv->x1/2),
 414                                         vf->priv->bitmap.u + (((ypos/2)*(vf->priv->w)/2)) + (vf->priv->x1/2),
 415                                         (vf->priv->x2 - vf->priv->x1)/2 );
 416                                 fast_memcpy( dmpi->planes[2] + ((ypos/2)*dmpi->stride[2]) + (vf->priv->x1/2),
 417                                         vf->priv->bitmap.v + (((ypos/2)*(vf->priv->w)/2)) + (vf->priv->x1/2),
 418                                         (vf->priv->x2 - vf->priv->x1)/2 );
 419                         }
 420                 }
 421         } else { // Blit the bitmap to the videoscreen, pixel for pixel
 422             for( ypos=vf->priv->y1 ; ypos < vf->priv->y2 ; ypos++ ) {
 423                 for ( xpos=vf->priv->x1 ; xpos < vf->priv->x2 ; xpos++ ) {
 424                                 pos = (ypos * dmpi->stride[0]) + xpos;
 425
 426                                 alpha = vf->priv->bitmap.a[pos];
 427
 428                                 if (alpha == 0) continue; // Completly transparent pixel
 429
 430                                 if (alpha == 255) {     // Opaque pixel
 431                                         dmpi->planes[0][pos] = vf->priv->bitmap.y[pos];
 432                                         if ((ypos%2) && (xpos%2)) {
 433                                                 pos = ( (ypos/2) * dmpi->stride[1] ) + (xpos/2);
 434                                                 dmpi->planes[1][pos] = vf->priv->bitmap.u[pos];
 435                                                 dmpi->planes[2][pos] = vf->priv->bitmap.v[pos];
 436                                         }
 437                                 } else { // Alphablended pixel
 438                                         dmpi->planes[0][pos] =
 439                                                 ((255 - alpha) * (int)dmpi->planes[0][pos] +
 440                                                 alpha * (int)vf->priv->bitmap.y[pos]) >> 8;
 441
 442                                         if ((ypos%2) && (xpos%2)) {
 443                                                 pos = ( (ypos/2) * dmpi->stride[1] ) + (xpos/2);
 444
 445                                                 dmpi->planes[1][pos] =
 446                                                         ((255 - alpha) * (int)dmpi->planes[1][pos] +
 447                                                         alpha * (int)vf->priv->bitmap.u[pos]) >> 8;
 448
 449                                                 dmpi->planes[2][pos] =
 450                                                         ((255 - alpha) * (int)dmpi->planes[2][pos] +
 451                                                         alpha * (int)vf->priv->bitmap.v[pos]) >> 8;
 452                                         }
 453                             }
 454                         } // for xpos
 455                 } // for ypos
 456         } // if !opaque
 457     return vf_next_put_image(vf, dmpi, MP_NOPTS_VALUE);
 458 } // put_image
 459
 460 static int
 461 vf_open(vf_instance_t *vf, char *args)
 462 {
 463     char filename[1000];
 464
 465     vf->config = config;
 466     vf->put_image = put_image;
 467     vf->query_format = query_format;
 468         vf->uninit = uninit;
 469
 470     vf->priv = malloc(sizeof(struct vf_priv_s));
 471
 472         if(!args || sscanf(args, "%d:%d:%s", &vf->priv->hidden, &vf->priv->opaque, filename) < 3 ) {
 473         mp_msg(MSGT_VFILTER, MSGL_ERR, "vf_bmovl: Bad arguments!\n");
 474                 mp_msg(MSGT_VFILTER, MSGL_ERR, "vf_bmovl: Arguments are 'bool hidden:bool opaque:string fifo'\n");
 475                 return FALSE;
 476     }
 477
 478     vf->priv->stream_fd = open(filename, O_RDWR);
 479     if(vf->priv->stream_fd >= 0) {
 480                 FD_ZERO( &vf->priv->stream_fdset );
 481                 mp_msg(MSGT_VFILTER, MSGL_INFO, "vf_bmovl: Opened fifo %s as FD %d\n", filename, vf->priv->stream_fd);
 482         } else {
 483                 mp_msg(MSGT_VFILTER, MSGL_WARN, "vf_bmovl: Error! Couldn't open FIFO %s: %s\n", filename, strerror(errno));
 484                 vf->priv->stream_fd = -1;
 485     }
 486
 487     return TRUE;
 488 }
 489
 490 const vf_info_t vf_info_bmovl = {
 491     "Read bitmaps from a FIFO and display them in window",
 492     "bmovl",
 493     "Per Wigren",
 494     "",
 495     vf_open,
 496     NULL
 497 };