-vop bmovl - BitMap OVerLay videofilter for MPlayer

patch by Per Wigren <wigren@home.se>
TODO: -dr, MMX opt, fix alpha-only png, other colorspaces


git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@7856 b3059339-0415-0410-9bf9-f77b7e298cf2

3 files changed, 444 insertions, 1 deletions

diff --git a/libmpcodecs/Makefile b/libmpcodecs/Makefile
index 62e05f5d74..92e2a30b8f 100644
--- a/libmpcodecs/Makefile
+++ b/libmpcodecs/Makefile
@@ -6,7 +6,7 @@ LIBNAME2 = libmpencoders.a
 
 AUDIO_SRCS=dec_audio.c ad.c ad_liba52.c ad_acm.c ad_alaw.c ad_dk3adpcm.c ad_dshow.c ad_dvdpcm.c ad_ffmpeg.c ad_hwac3.c ad_imaadpcm.c ad_mp3lib.c ad_msadpcm.c ad_pcm.c ad_roqaudio.c ad_msgsm.c ad_faad.c ad_libvorbis.c ad_libmad.c ad_realaud.c ad_libdv.c
 VIDEO_SRCS=dec_video.c vd.c vd_null.c vd_realvid.c vd_cinepak.c vd_qtrpza.c vd_ffmpeg.c vd_dshow.c vd_vfw.c vd_vfwex.c vd_odivx.c vd_divx4.c vd_raw.c vd_xanim.c vd_msvidc.c vd_fli.c vd_qtrle.c vd_qtsmc.c vd_roqvideo.c vd_cyuv.c vd_nuv.c vd_libmpeg2.c vd_msrle.c vd_huffyuv.c vd_mpegpes.c vd_svq1.c vd_xvid.c vd_libdv.c vd_lcl.c vd_mtga.c vd_lzo.c
-VFILTER_SRCS=vf.c vf_vo.c vf_crop.c vf_expand.c vf_pp.c vf_scale.c vf_format.c vf_yuy2.c vf_flip.c vf_rgb2bgr.c vf_rotate.c vf_mirror.c vf_palette.c vf_lavc.c vf_dvbscale.c vf_cropdetect.c vf_test.c vf_noise.c vf_yvu9.c vf_rectangle.c vf_lavcdeint.c vf_eq.c vf_eq2.c vf_halfpack.c vf_dint.c vf_1bpp.c
+VFILTER_SRCS=vf.c vf_vo.c vf_crop.c vf_expand.c vf_pp.c vf_scale.c vf_format.c vf_yuy2.c vf_flip.c vf_rgb2bgr.c vf_rotate.c vf_mirror.c vf_palette.c vf_lavc.c vf_dvbscale.c vf_cropdetect.c vf_test.c vf_noise.c vf_yvu9.c vf_rectangle.c vf_lavcdeint.c vf_eq.c vf_eq2.c vf_halfpack.c vf_dint.c vf_1bpp.c vf_bmovl.c
 ENCODER_SRCS=ve.c ve_divx4.c ve_lavc.c ve_vfw.c ve_rawrgb.c ve_libdv.c ve_xvid.c
 NATIVE_SRCS=native/RTjpegN.c native/cinepak.c native/cyuv.c native/fli.c native/minilzo.c native/msvidc.c native/nuppelvideo.c native/qtrle.c native/qtrpza.c native/qtsmc.c native/roqav.c native/xa_gsm.c native/svq1.c
 
diff --git a/libmpcodecs/vf.c b/libmpcodecs/vf.c
index aceab31d64..a8a9594634 100644
--- a/libmpcodecs/vf.c
+++ b/libmpcodecs/vf.c
@@ -17,6 +17,7 @@
 
 extern vf_info_t vf_info_vo;
 extern vf_info_t vf_info_rectangle;
+extern vf_info_t vf_info_bmovl;
 extern vf_info_t vf_info_crop;
 extern vf_info_t vf_info_expand;
 extern vf_info_t vf_info_pp;
@@ -49,6 +50,7 @@ char** vo_plugin_args=(char**) NULL;
 // list of available filters:
 static vf_info_t* filter_list[]={
     &vf_info_rectangle,
+    &vf_info_bmovl,
     &vf_info_crop,
     &vf_info_expand,
     &vf_info_pp,
diff --git a/libmpcodecs/vf_bmovl.c b/libmpcodecs/vf_bmovl.c
new file mode 100644
index 0000000000..b90e4bf6be
--- /dev/null
+++ b/libmpcodecs/vf_bmovl.c
@@ -0,0 +1,441 @@
+/* vf_bmovl.c v0.9.1 - BitMap OVerLay videofilter for MPlayer
+ *
+ * (C) 2002 Per Wigren <wigren@home.se>
+ * Licenced under the GNU General Public License
+ *
+ * Use MPlayer as a framebuffer to read bitmaps and commands from a FIFO
+ * and display them in the window.
+ *
+ * FIXME: INSTRUCTION IS OUT OF DATE!!!
+ *
+ * It understands the following format:
+ * COMMAND width height xpos ypos alpha clear
+ *
+ * Commands are:
+ * RGBA32    Followed by WIDTH*HEIGHT of raw RGBA32 data.
+ * BGRA32    Followed by WIDTH*HEIGHT of raw BGRA32 data.
+ * RGB24     Followed by WIDTH*HEIGHT of raw RGB24 data.
+ * ALPHA     Set alpha for area. Values can be -255 to 255.
+ *           0 = No change
+ * CLEAR     Zero area
+ * OPAQUE    Disable all alpha transparency!
+ *           Send an ALPHA command with 0's to enable again!
+ * HIDE      Hide bitmap
+ * SHOW      Show bitmap
+ *
+ * Arguments are:
+ * width, height    Size of image/area
+ * xpos, ypos       Start blitting at X/Y position
+ * alpha            Set alpha difference. 0 means same as original.
+ *                  255 makes everything opaque
+ *                  -255 makes everything transparent
+ *                  If you set this to -255 you can then send a sequence of
+ *                  ALPHA-commands to set the area to -225, -200, -175 etc
+ *                  for a nice fade-in-effect! ;)
+ * clear            Clear the framebuffer before blitting. 1 means clear.
+ *                  If 0, the image will just be blitted on top of the old
+ *                  one, so you don't need to send 1,8MB of RGBA32 data
+ *                  everytime a small part of the screen is updated.
+ *
+ * Note that you always have to send all arguments, even if they are not
+ * used for a particular command!
+ *
+ * Arguments for the filter are hidden:opaque:fifo
+ * For example 1:0:/tmp/myfifo.fifo will start the filter hidden, transparent
+ * and use /tmp/myfifo.fifo as the fifo.
+ *
+ * If you find bugs, please send me patches! ;)
+ *
+ * This filter was developed for use in Freevo (http://freevo.sf.net), but
+ * anyone is free to use it! ;)
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include "mp_image.h"
+#include "vf.h"
+#include "img_format.h"
+
+#include "../libvo/fastmemcpy.h"
+
+#define IS_RAWIMG	0x100
+#define IS_IMG		0x200
+
+#define NONE		0x000
+#define IMG_RGBA32	0x101
+#define IMG_ABGR32	0x102
+#define IMG_RGB24	0x103
+#define IMG_BGR24	0x104
+#define IMG_PNG		0x201
+#define CMD_CLEAR	0x001
+#define CMD_ALPHA	0x002
+
+#define TRUE  1
+#define FALSE 0
+
+#define MAX(a,b) ((a) > (b) ? (a) : (b))
+#define MIN(a,b) ((a) < (b) ? (a) : (b))
+#define INRANGE(a,b,c)	( ((a) < (b)) ? (b) : ( ((a) > (c)) ? (c) : (a) ) )
+
+#define rgb2y(R,G,B)  (  (0.257 * R) + (0.504 * G) + (0.098 * B) + 16  )
+#define rgb2u(R,G,B)  ( -(0.148 * R) - (0.291 * G) + (0.439 * B) + 128 )
+#define rgb2v(R,G,B)  (  (0.439 * R) - (0.368 * G) - (0.071 * B) + 128 )
+
+#define DBG(a) (printf("DEBUG: %d\n", a))
+
+struct vf_priv_s {
+    int w, h, x1, y1, x2, y2;
+	struct {
+		unsigned char *y, *u, *v, *a, *oa;
+	} bitmap;
+    int stream_fd;
+	fd_set stream_fdset;
+	int opaque, hidden;
+};
+
+static int
+query_format(struct vf_instance_s* vf, unsigned int fmt){
+    if(fmt==IMGFMT_YV12) return VFCAP_CSP_SUPPORTED;
+    return 0;
+}
+
+
+static int
+config(struct vf_instance_s* vf,
+       int width, int height, int d_width, int d_height,
+       unsigned int flags, unsigned int outfmt)
+{
+	vf->priv->bitmap.y  = malloc( width*height );
+	vf->priv->bitmap.u  = malloc( width*height/4 );
+	vf->priv->bitmap.v  = malloc( width*height/4 );
+	vf->priv->bitmap.a  = malloc( width*height );
+	vf->priv->bitmap.oa = malloc( width*height );
+	if(!( vf->priv->bitmap.y &&
+	      vf->priv->bitmap.u &&
+		  vf->priv->bitmap.v &&
+		  vf->priv->bitmap.a &&
+		  vf->priv->bitmap.oa )) {
+		fprintf(stderr, "vf_bmovl: Could not allocate memory for bitmap buffer: %s\n", strerror(errno) );
+		exit(10);
+	}
+
+	// Set default to black...
+	memset( vf->priv->bitmap.u, 128, width*height/4 );
+	memset( vf->priv->bitmap.v, 128, width*height/4 );
+
+    vf->priv->w  = vf->priv->x1 = width;
+    vf->priv->h  = vf->priv->y1 = height;
+    vf->priv->y2 = vf->priv->x2 = 0;
+
+    return vf_next_config(vf, width, height, d_width, d_height, flags, outfmt);
+}
+
+static void
+uninit(struct vf_instance_s *vf)
+{
+	if(vf->priv) {
+		free(vf->priv->bitmap.y);
+		free(vf->priv->bitmap.u);
+		free(vf->priv->bitmap.v);
+		free(vf->priv->bitmap.a);
+		free(vf->priv->bitmap.oa);
+		free(vf->priv);
+	}
+}
+
+static int
+_read_cmd(int fd, char *cmd, char *args) {
+	int done=FALSE, pos=0;
+	char tmp;
+
+	while(!done) {
+		if(! read( fd, &tmp, 1 ) ) return FALSE;
+		if( (tmp>='A' && tmp<='Z') || (tmp>='0' && tmp<='9') )
+			cmd[pos]=tmp;
+		else if(tmp == ' ') {
+			cmd[pos]='\0';
+			done=TRUE;
+		}
+		else if(tmp == '\n') {
+			cmd[pos]='\0';
+			args[0]='\0';
+			return TRUE;
+		}
+		if(pos++>20) {
+			cmd[0]='\0';
+			return TRUE;
+		}
+	}
+	done=FALSE; pos=0;
+	while(!done) {
+		if(! read( fd, &tmp, 1 ) ) return FALSE;
+		if( (tmp >= ' ') && (pos<100) ) args[pos]=tmp;
+		else {
+			args[pos]='\0';
+			done=TRUE;
+		}
+		pos++;
+	}
+	return TRUE;
+}
+			
+
+static int
+put_image(struct vf_instance_s* vf, mp_image_t* mpi){
+	int buf_x=0, buf_y=0, buf_pos=0;
+	int xpos=0, ypos=0, pos=0;
+	unsigned char red=0, green=0, blue=0;
+	int  alpha;
+	mp_image_t* dmpi;
+
+    dmpi = vf_get_image(vf->next, mpi->imgfmt, MP_IMGTYPE_TEMP,
+						MP_IMGFLAG_ACCEPT_STRIDE | MP_IMGFLAG_PREFER_ALIGNED_STRIDE,
+						mpi->w, mpi->h);
+
+	memcpy( dmpi->planes[0], mpi->planes[0], mpi->stride[0] * mpi->height);
+	memcpy( dmpi->planes[1], mpi->planes[1], mpi->stride[1] * mpi->chroma_height);
+	memcpy( dmpi->planes[2], mpi->planes[2], mpi->stride[2] * mpi->chroma_height);
+
+    if(vf->priv->stream_fd >= 0) {
+		struct timeval tv;
+
+		FD_SET( vf->priv->stream_fd, &vf->priv->stream_fdset );
+		tv.tv_sec=0; tv.tv_usec=0;
+
+		if( select( vf->priv->stream_fd+1, &vf->priv->stream_fdset, NULL, NULL, &tv ) > 0) {
+			// We've got new data from the FIFO
+
+			char cmd[20], args[100];
+			int  imgw,imgh,imgx,imgy,clear,imgalpha,pxsz=1,command;
+			unsigned char *buffer = NULL;
+
+			if(! _read_cmd( vf->priv->stream_fd, cmd, args) ) {
+				fprintf(stderr, "\nvf_bmovl: Error reading commands: %s\n\n", strerror(errno));
+				exit(10);
+			}
+			printf("\nDEBUG: Got: %s+%s\n", cmd, args);
+
+			command=NONE;
+			if     ( strncmp(cmd,"RGBA32",6)==0 ) { pxsz=4; command = IMG_RGBA32; }
+			else if( strncmp(cmd,"ABGR32",6)==0 ) { pxsz=4; command = IMG_ABGR32; }
+			else if( strncmp(cmd,"RGB24" ,5)==0 ) { pxsz=3; command = IMG_RGB24;  }
+			else if( strncmp(cmd,"BGR24" ,5)==0 ) { pxsz=3; command = IMG_BGR24;  }
+			else if( strncmp(cmd,"CLEAR" ,5)==0 ) { pxsz=1; command = CMD_CLEAR;  }
+			else if( strncmp(cmd,"ALPHA" ,5)==0 ) { pxsz=1; command = CMD_ALPHA;  }
+			else if( strncmp(cmd,"OPAQUE",6)==0 ) vf->priv->opaque=TRUE;
+			else if( strncmp(cmd,"SHOW",  4)==0 ) vf->priv->hidden=FALSE;
+			else if( strncmp(cmd,"HIDE",  4)==0 ) vf->priv->hidden=TRUE;
+			else if( strncmp(cmd,"FLUSH" ,5)==0 ) return vf_next_put_image(vf, dmpi);
+			else {
+			    fprintf(stderr, "\nvf_bmovl: Unknown command: '%s'. Ignoring.\n", cmd);
+			    return vf_next_put_image(vf, dmpi);
+			}
+
+			if(command == CMD_ALPHA) {
+				sscanf( args, "%d %d %d %d %d", &imgw, &imgh, &imgx, &imgy, &imgalpha);
+				printf("\nDEBUG: ALPHA: %d %d %d %d %d\n\n",
+					imgw, imgh, imgx, imgy, imgalpha);
+				if(imgw==0 && imgh==0) vf->priv->opaque=FALSE;
+			}
+
+			if(command & IS_RAWIMG) {
+				sscanf( args, "%d %d %d %d %d %d",
+					&imgw, &imgh, &imgx, &imgy, &imgalpha, &clear);
+				printf("\nDEBUG: RAWIMG: %d %d %d %d %d %d\n\n",
+					imgw, imgh, imgx, imgy, imgalpha, clear);
+
+			    buffer = malloc(imgw*imgh*pxsz);
+			    if(!buffer) {
+			    	fprintf(stderr, "\nvf_bmovl: Couldn't allocate temporary buffer! Skipping...\n\n");
+					return vf_next_put_image(vf, dmpi);
+			    }
+			    printf("Got %d bytes...\n", read( vf->priv->stream_fd, buffer, (imgw*imgh*pxsz) ) );
+
+				if(clear) {
+					memset( vf->priv->bitmap.y,   0, vf->priv->w*vf->priv->h );
+					memset( vf->priv->bitmap.u, 128, vf->priv->w*vf->priv->h/4 );
+					memset( vf->priv->bitmap.v, 128, vf->priv->w*vf->priv->h/4 );
+					memset( vf->priv->bitmap.a,   0, vf->priv->w*vf->priv->h );
+					memset( vf->priv->bitmap.oa,  0, vf->priv->w*vf->priv->h );
+					vf->priv->x1 = dmpi->width;
+					vf->priv->y1 = dmpi->height;
+					vf->priv->x2 = vf->priv->y2 = 0;
+				}
+				// Define how much of our bitmap that contains graphics!
+				vf->priv->x1 = MAX( 0, MIN(vf->priv->x1, imgx) );
+				vf->priv->y1 = MAX( 0, MIN(vf->priv->y1, imgy) );
+				vf->priv->x2 = MIN( vf->priv->w, MAX(vf->priv->x2, ( imgx + imgw)) );
+				vf->priv->y2 = MIN( vf->priv->h, MAX(vf->priv->y2, ( imgy + imgh)) );
+			}
+			
+			if( command == CMD_CLEAR ) {
+				sscanf( args, "%d %d %d %d", &imgw, &imgh, &imgx, &imgy);
+				printf("\nDEBUG: CLEAR: %d %d %d %d\n\n", imgw, imgh, imgx, imgy);
+
+				for( ypos=imgy ; (ypos < (imgy+imgh)) && (ypos < vf->priv->y2) ; ypos++ ) {
+					memset( vf->priv->bitmap.y  + (ypos*vf->priv->w) + imgx, 0, imgw );
+					memset( vf->priv->bitmap.a  + (ypos*vf->priv->w) + imgx, 0, imgw );
+					memset( vf->priv->bitmap.oa + (ypos*vf->priv->w) + imgx, 0, imgw );
+					if(ypos%2) {
+						memset( vf->priv->bitmap.u + ((ypos/2)*dmpi->stride[1]) + (imgx/2), 128, imgw/2 );
+						memset( vf->priv->bitmap.v + ((ypos/2)*dmpi->stride[2]) + (imgx/2), 128, imgw/2 );
+					}
+				}	// Recalculate area that contains graphics
+				if( (imgx <= vf->priv->x1) && ( (imgw+imgx) >= vf->priv->x2) ) {
+					if( (imgy <= vf->priv->y1) && ( (imgy+imgh) >= vf->priv->y1) )
+						vf->priv->y1 = imgy+imgh;
+					if( (imgy <= vf->priv->y2) && ( (imgy+imgh) >= vf->priv->y2) )
+						vf->priv->y2 = imgy;
+				}
+				if( (imgy <= vf->priv->y1) && ( (imgy+imgh) >= vf->priv->y2) ) {
+					if( (imgx <= vf->priv->x1) && ( (imgx+imgw) >= vf->priv->x1) )
+						vf->priv->x1 = imgx+imgw;
+					if( (imgx <= vf->priv->x2) && ( (imgx+imgw) >= vf->priv->x2) )
+						vf->priv->x2 = imgx;
+				}
+				return vf_next_put_image(vf, dmpi);
+			}
+
+			for( buf_y=0 ; (buf_y < imgh) && (buf_y < (vf->priv->h-imgy)) ; buf_y++ ) {
+			    for( buf_x=0 ; (buf_x < (imgw*pxsz)) && (buf_x < ((vf->priv->w+imgx)*pxsz)) ; buf_x += pxsz ) {
+					if(command & IS_RAWIMG) buf_pos = (buf_y * imgw * pxsz) + buf_x;
+					pos = ((buf_y+imgy) * vf->priv->w) + ((buf_x/pxsz)+imgx);
+
+					switch(command) {
+						case IMG_RGBA32:
+							red   = buffer[buf_pos+0];
+							green = buffer[buf_pos+1];
+							blue  = buffer[buf_pos+2];
+							alpha = buffer[buf_pos+3];
+							break;
+						case IMG_ABGR32:
+							alpha = buffer[buf_pos+0];
+							blue  = buffer[buf_pos+1];
+							green = buffer[buf_pos+2];
+							red   = buffer[buf_pos+3];
+							break;
+						case IMG_RGB24:
+							red   = buffer[buf_pos+0];
+							green = buffer[buf_pos+1];
+							blue  = buffer[buf_pos+2];
+							alpha = 0xFF;
+		    				break;
+						case IMG_BGR24:
+							blue  = buffer[buf_pos+0];
+							green = buffer[buf_pos+1];
+							red   = buffer[buf_pos+2];
+							alpha = 0xFF;
+		    				break;
+						case CMD_ALPHA:
+							vf->priv->bitmap.a[pos] = INRANGE((vf->priv->bitmap.oa[pos]+imgalpha),0,255);
+							break;
+						default:
+					   		fprintf(stderr, "vf_bmovl: Internal error!\n");
+							exit( 10 );
+					}
+					if( command & IS_RAWIMG ) {
+						vf->priv->bitmap.y[pos]  = rgb2y(red,green,blue);
+						vf->priv->bitmap.oa[pos] = alpha;
+						vf->priv->bitmap.a[pos]  = INRANGE((alpha+imgalpha),0,255);
+						if((buf_y%2) && ((buf_x/pxsz)%2)) {
+							pos = ( ((buf_y+imgy)/2) * dmpi->stride[1] ) + (((buf_x/pxsz)+imgx)/2);
+							vf->priv->bitmap.u[pos] = rgb2u(red,green,blue);
+							vf->priv->bitmap.v[pos] = rgb2v(red,green,blue);
+						}
+					}
+				} // for buf_x
+			} // for buf_y
+			free (buffer);
+		} else if(errno) fprintf(stderr, "\nvf_bmovl: Error %d in fifo: %s\n\n", errno, strerror(errno));
+    }
+
+	if(vf->priv->hidden) return vf_next_put_image(vf, dmpi);
+
+	if(vf->priv->opaque) {	// Just copy buffer memory to screen
+		for( ypos=vf->priv->y1 ; ypos < vf->priv->y2 ; ypos++ ) {
+			memcpy( dmpi->planes[0] + (ypos*dmpi->stride[0]) + vf->priv->x1,
+			        vf->priv->bitmap.y + (ypos*vf->priv->w) + vf->priv->x1,
+					vf->priv->x2 - vf->priv->x1 );
+			if(ypos%2) {
+				memcpy( dmpi->planes[1] + ((ypos/2)*dmpi->stride[1]) + (vf->priv->x1/2),
+				        vf->priv->bitmap.u + (((ypos/2)*(vf->priv->w)/2)) + (vf->priv->x1/2),
+				        (vf->priv->x2 - vf->priv->x1)/2 );
+				memcpy( dmpi->planes[2] + ((ypos/2)*dmpi->stride[2]) + (vf->priv->x1/2),
+				        vf->priv->bitmap.v + (((ypos/2)*(vf->priv->w)/2)) + (vf->priv->x1/2),
+				        (vf->priv->x2 - vf->priv->x1)/2 );
+			}
+		}
+	} else { // Blit the bitmap to the videoscreen, pixel for pixel
+	    for( ypos=vf->priv->y1 ; ypos < vf->priv->y2 ; ypos++ ) {
+	        for ( xpos=vf->priv->x1 ; xpos < vf->priv->x2 ; xpos++ ) {
+				pos = (ypos * dmpi->stride[0]) + xpos;
+
+				alpha = vf->priv->bitmap.a[pos];
+
+				if (alpha == 0) continue; // Completly transparent pixel
+
+				if (alpha == 255) {	// Opaque pixel
+					dmpi->planes[0][pos] = vf->priv->bitmap.y[pos];
+					if ((ypos%2) && (xpos%2)) {
+						pos = ( (ypos/2) * dmpi->stride[1] ) + (xpos/2);
+						dmpi->planes[1][pos] = vf->priv->bitmap.u[pos];
+						dmpi->planes[2][pos] = vf->priv->bitmap.v[pos];
+					}
+				} else { // Alphablended pixel
+					dmpi->planes[0][pos] = (dmpi->planes[0][pos]*(1.0-(alpha/255.0))) + (vf->priv->bitmap.y[pos]*(alpha/255.0));
+					if ((ypos%2) && (xpos%2)) {
+						pos = ( (ypos/2) * dmpi->stride[1] ) + (xpos/2);
+						dmpi->planes[1][pos] = (dmpi->planes[1][pos]*(1.0-(alpha/255.0))) + (vf->priv->bitmap.u[pos]*(alpha/255.0));
+						dmpi->planes[2][pos] = (dmpi->planes[2][pos]*(1.0-(alpha/255.0))) + (vf->priv->bitmap.v[pos]*(alpha/255.0));
+					}
+			    }
+			} // for xpos
+		} // for ypos
+	} // if !opaque
+    return vf_next_put_image(vf, dmpi);
+} // put_image
+
+static int
+vf_open(vf_instance_t* vf, char* args)
+{
+    char filename[1000];
+
+    vf->config = config;
+    vf->put_image = put_image;
+    vf->query_format = query_format;
+	vf->uninit = uninit;
+
+    vf->priv = malloc(sizeof(struct vf_priv_s));
+
+	if( sscanf(args, "%d:%d:%s", &vf->priv->hidden, &vf->priv->opaque, filename) < 3 ) {
+        fprintf(stderr, "vf_bmovl: Bad arguments!\n");
+		fprintf(stderr, "vf_bmovl: Arguments are 'bool hidden:bool opaque:string fifo'\n");
+		exit(5);
+    }
+
+    vf->priv->stream_fd = open(filename, O_RDWR);
+    if(vf->priv->stream_fd >= 0) {
+		FD_ZERO( &vf->priv->stream_fdset );
+		printf("vf_bmovl: Opened fifo %s as FD %d\n", filename, vf->priv->stream_fd);
+	} else {
+		fprintf(stderr, "vf_bmovl: Error! Couldn't open FIFO %s: %s\n", filename, strerror(errno));
+		vf->priv->stream_fd = -1;
+    }
+
+    return TRUE;
+}
+
+vf_info_t vf_info_bmovl = {
+    "Read bitmaps from a FIFO and display them in window",
+    "bmovl",
+    "Per Wigren",
+    "",
+    vf_open
+};