cinerama support in -vo zr for people with more than one zoran card, documentation contained in -zrhelp

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@6933 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 468 insertions, 365 deletions

diff --git a/libvo/vo_zr.c b/libvo/vo_zr.c
index d08a00ac13..f733e5ba79 100644
--- a/libvo/vo_zr.c
+++ b/libvo/vo_zr.c
@@ -40,61 +40,77 @@ static vo_info_t vo_info =
 	""
 };
 
+#define	ZR_MAX_DEVICES 4
 /* General variables */
 
-static int image_width;
-static int image_height;
-static int off_y, off_c, stride; /* for use by 'draw slice/frame' */
-static int framenum;
-static int fields = 1; /* currently no interlacing */
-static int zrfd = 0;
-static int bw = 0; /* if bw == 1, then display in black&white */
-static int vdec = 1;
-static int hdec = 1;
-static int size;
-static int quality = 2;
-static unsigned char *y_data, *u_data, *v_data;
-static int y_stride, u_stride, v_stride;
-
 typedef struct {
 	int width;
 	int height;
 	int xoff;
 	int yoff;
 	int set;
-} geo;
-geo g = {0, 0, 0, 0, 0};
+} geo_t;
+
+static int zr_count = 1;
+static int zr_parsing = 0;
+static int framenum;
+
+typedef struct {
+	/* commandline args given for this device (and defaults) */
+	int vdec, hdec; 	/* requested decimation 1,2,4 */
+	int fd; 		/* force decimation */
+	int xdoff, ydoff;	/* offset from upperleft of screen 
+				 * default is 'centered' */
+	int quality; 		/* jpeg quality 1=best, 20=bad */
+	geo_t g;		/* view window (zrcrop) */
+	char *device;		/* /dev/video1 */
+	int bw;			/* if bw == 1, display in black&white */
+	int norm;	 	/* PAL/NTSC */
+
+	/* buffers + pointers + info */
+
+	unsigned char *image;
+	int image_width, image_height, size;
+	int off_y, off_c, stride;    /* for use by 'draw slice/frame' */
+
+	unsigned char *buf;   /* the jpeg images will be placed here */
+	jpeg_enc_t *j;
+	unsigned char *y_data, *u_data, *v_data; /* used by the jpeg encoder */
+	int y_stride, u_stride, v_stride; /* these point somewhere in image */
+
+	/* information for (and about) the zoran card */
+
+	int vdes;			/* file descriptor of card */
+	int frame, synco, queue; 	/* buffer management */
+	struct mjpeg_sync zs;		/* state information */
+	struct mjpeg_params p;
+	struct video_capability vc;	/* max resolution and so on */
+	int fields, stretchy; /* must the *image be interlaced
+					   or stretched to fit on the screen? */
+} zr_info_t;
+
+static zr_info_t zr_info[ZR_MAX_DEVICES] = {
+	{1, 1, 1, -1, -1, 2, {0, 0, 0, 0, 0}, NULL, 0, VIDEO_MODE_AUTO, NULL, 0, 0, 0, 0, 0, 
+	0, NULL, NULL, NULL, NULL, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
+	{1, 1, 1, -1, -1, 2, {0, 0, 0, 0, 0}, NULL, 0, VIDEO_MODE_AUTO, NULL, 0, 0, 0, 0, 0, 
+	0, NULL, NULL, NULL, NULL, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
+	{1, 1, 1, -1, -1, 2, {0, 0, 0, 0, 0}, NULL, 0, VIDEO_MODE_AUTO, NULL, 0, 0, 0, 0, 0, 
+	0, NULL, NULL, NULL, NULL, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
+	{1, 1, 1, -1, -1, 2, {0, 0, 0, 0, 0}, NULL, 0, VIDEO_MODE_AUTO, NULL, 0, 0, 0, 0, 0, 
+	0, NULL, NULL, NULL, NULL, NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}};
 
-static uint8_t *image=NULL;
-static uint8_t *buf=NULL;
 
-static jpeg_enc_t *j;
 
-/* Variables needed for Zoran */
 
-int vdes;  /* the file descriptor of the video device */
-int frame = 0, synco = 0, queue = 0; /* buffer management */
-struct mjpeg_params zp;
-struct mjpeg_requestbuffers zrq;
-struct mjpeg_sync zs;
-struct video_capability vc;
 #define MJPEG_NBUFFERS	2
 #define MJPEG_SIZE	1024*256
 
-//should be command line options
-int norm = VIDEO_MODE_AUTO;
-#if 0
-#ifndef VO_ZR_DEFAULT_DEVICE
-#define VO_ZR_DEFAULT_DEVICE "/dev/video"
-#endif
-#endif
-char *device = NULL;
 
-int zoran_getcap() {
+int zoran_getcap(zr_info_t *zr) {
 	char* dev;
 
-	if (device)
-		dev = device;
+	if (zr->device)
+		dev = zr->device;
 	else {  /* code borrowed from mjpegtools lavplay.c // 20020416 too */
 		struct stat vstat;
 
@@ -126,9 +142,9 @@ int zoran_getcap() {
 		mp_msg(MSGT_VO, MSGL_V, "zr: found video device %s\n", dev);
 	}
 			
-	vdes = open(dev, O_RDWR);
+	zr->vdes = open(dev, O_RDWR);
 
-	if (vdes < 0) {
+	if (zr->vdes < 0) {
 		mp_msg(MSGT_VO, MSGL_ERR, "zr: error opening %s: %s\n", 
 		       dev, strerror(errno));
 		return 1;
@@ -137,61 +153,72 @@ int zoran_getcap() {
 	/* before we can ask for the maximum resolution, we must set 
 	 * the correct tv norm */
 
-	if (ioctl(vdes, MJPIOC_G_PARAMS, &zp) < 0) {
+	if (ioctl(zr->vdes, MJPIOC_G_PARAMS, &zr->p) < 0) {
 		mp_msg(MSGT_VO, MSGL_ERR, "zr: device at %s is probably not a DC10(+)/buz/lml33\n", dev);
 		return 1;
 	}
 	
-	if (zp.norm != norm && norm != VIDEO_MODE_AUTO) {
+	if (zr->p.norm != zr->norm && zr->norm != VIDEO_MODE_AUTO) {
 		/* attempt to set requested norm */
-		zp.norm = norm;
-		if (ioctl(vdes, MJPIOC_S_PARAMS, &zp) < 0) {
+		zr->p.norm = zr->norm;
+		if (ioctl(zr->vdes, MJPIOC_S_PARAMS, &zr->p) < 0) {
 			mp_msg(MSGT_VO, MSGL_ERR,
 				"zr: unable to change video norm, use another program to change it (XawTV)\n");
 			return 1;
 		}
-		ioctl(vdes, MJPIOC_G_PARAMS, &zp);
-		if (norm != zp.norm) {
+		ioctl(zr->vdes, MJPIOC_G_PARAMS, &zr->p);
+		if (zr->norm != zr->p.norm) {
 			mp_msg(MSGT_VO, MSGL_ERR,
 				"zr: unable to change video norm, use another program to change it (XawTV)\n");
 			return 1;
 		}
 	}
 	
-	if (ioctl(vdes, VIDIOCGCAP, &vc) < 0) {
+	if (ioctl(zr->vdes, VIDIOCGCAP, &zr->vc) < 0) {
 		mp_msg(MSGT_VO, MSGL_ERR, "zr: error getting video capabilities from %s\n");
 		return 1;
 	}
-	mp_msg(MSGT_VO, MSGL_V, "zr: MJPEG card reports maxwidth=%d, maxheight=%d\n", vc.maxwidth, vc.maxheight);
+	mp_msg(MSGT_VO, MSGL_V, "zr: MJPEG card reports maxwidth=%d, maxheight=%d\n", zr->vc.maxwidth, zr->vc.maxheight);
 	
 	return 0;
 }
 	
-int init_zoran(int zrhdec, int zrvdec) {
+int init_zoran(zr_info_t *zr, int stretchx, int stretchy) {
+	struct mjpeg_requestbuffers zrq;
 	/* center the image, and stretch it as far as possible (try to keep
 	 * aspect) and check if it fits */
-	if (image_width > vc.maxwidth) {
-		mp_msg(MSGT_VO, MSGL_ERR, "zr: movie to be played is too wide, max width currenty %d\n", vc.maxwidth);
+	if (zr->image_width > zr->vc.maxwidth) {
+		mp_msg(MSGT_VO, MSGL_ERR, "zr: movie to be played is too wide, max width currenty %d\n", zr->vc.maxwidth);
 		return 1;
 	}
 
-	if (image_height > vc.maxheight) {
-		mp_msg(MSGT_VO, MSGL_ERR, "zr: movie to be played is too high, max height currenty %d\n", vc.maxheight);
+	if (zr->image_height > zr->vc.maxheight) {
+		mp_msg(MSGT_VO, MSGL_ERR, "zr: movie to be played is too high, max height currenty %d\n", zr->vc.maxheight);
 		return 1;
 	}
 
-	zp.decimation = 0;
-	zp.HorDcm = zrhdec; 
-	zp.VerDcm = zrvdec;
-	zp.TmpDcm = 1;
-	zp.field_per_buff = fields;
-	zp.img_x = (vc.maxwidth - zp.HorDcm*(int)image_width/hdec)/2;
-	zp.img_y = (vc.maxheight - zp.VerDcm*(3-fields)*(int)image_height)/4;
-	zp.img_width = zp.HorDcm*image_width/hdec;
-	zp.img_height = zp.VerDcm*image_height/fields;
-	mp_msg(MSGT_VO, MSGL_V, "zr: geometry (after 'scaling'): %dx%d+%d+%d fields=%d, w=%d, h=%d\n", zp.img_width, (3-fields)*zp.img_height, zp.img_x, zp.img_y, fields, image_width/hdec, image_height);
-
-	if (ioctl(vdes, MJPIOC_S_PARAMS, &zp) < 0) {
+	zr->p.decimation = 0;
+	zr->p.HorDcm = stretchx; 
+	zr->p.VerDcm = stretchy;
+	zr->p.TmpDcm = 1;
+	zr->p.field_per_buff = zr->fields;
+	if (zr->xdoff == -1) {
+		zr->p.img_x = (zr->vc.maxwidth - 
+				zr->p.HorDcm*(int)zr->image_width/zr->hdec)/2;
+	} else {
+		zr->p.img_x = zr->xdoff;
+	}
+	if (zr->ydoff == -1) {
+		zr->p.img_y = (zr->vc.maxheight - zr->p.VerDcm*
+				(3-zr->fields)*(int)zr->image_height)/4;
+	} else {
+		zr->p.img_y = zr->ydoff;
+	}
+	zr->p.img_width = zr->p.HorDcm*zr->image_width/zr->hdec;
+	zr->p.img_height = zr->p.VerDcm*zr->image_height/zr->fields;
+	mp_msg(MSGT_VO, MSGL_V, "zr: geometry (after 'scaling'): %dx%d+%d+%d fields=%d, w=%d, h=%d\n", zr->p.img_width, (3-zr->fields)*zr->p.img_height, zr->p.img_x, zr->p.img_y, zr->fields, zr->image_width/zr->hdec, zr->image_height);
+
+	if (ioctl(zr->vdes, MJPIOC_S_PARAMS, &zr->p) < 0) {
 		mp_msg(MSGT_VO, MSGL_ERR, "zr: error setting display parameters\n");
 		return 1;
 	}
@@ -199,234 +226,250 @@ int init_zoran(int zrhdec, int zrvdec) {
 	zrq.count = MJPEG_NBUFFERS;
 	zrq.size = MJPEG_SIZE;
 
-	if (ioctl(vdes, MJPIOC_REQBUFS, &zrq)) {
+	if (ioctl(zr->vdes, MJPIOC_REQBUFS, &zrq)) {
 		mp_msg(MSGT_VO, MSGL_ERR, "zr: error requesting %d buffers of size %d\n", zrq.count, zrq.size);
 		return 1;
 	}
 
-	buf = (char*)mmap(0, zrq.count*zrq.size, PROT_READ|PROT_WRITE,
-			MAP_SHARED, vdes, 0);
+	zr->buf = (unsigned char*)mmap(0, zrq.count*zrq.size, 
+			PROT_READ|PROT_WRITE, MAP_SHARED, zr->vdes, 0);
 
-	if (buf == MAP_FAILED) {
+	if (zr->buf == MAP_FAILED) {
 		mp_msg(MSGT_VO, MSGL_ERR, "zr: error requesting %d buffers of size %d\n", zrq.count, zrq.size);
 		return 1;
 	}
 	return 0;
 }
 
-void uninit_zoran(void) {
-	if (image) {
-		free(image);
-		image=NULL;
+void uninit_zoran(zr_info_t *zr) {
+	if (zr->image) {
+		free(zr->image);
+		zr->image=NULL;
 	}
-	while (queue > synco + 1) {
-		if (ioctl(vdes, MJPIOC_SYNC, &zs) < 0) 
+	while (zr->queue > zr->synco + 1) {
+		if (ioctl(zr->vdes, MJPIOC_SYNC, &zr->zs) < 0) 
 			mp_msg(MSGT_VO, MSGL_ERR, "zr: error waiting for buffers to become free\n"); 
-		synco++;
+		zr->synco++;
 	}
 	/* stop streaming */
-	frame = -1;
-	if (ioctl(vdes, MJPIOC_QBUF_PLAY, &frame) < 0) 
+	zr->frame = -1;
+	if (ioctl(zr->vdes, MJPIOC_QBUF_PLAY, &zr->frame) < 0) 
 		mp_msg(MSGT_VO, MSGL_ERR, "zr: error stopping playback of last frame\n");
-	close(vdes);
+	close(zr->vdes);
 }
 
-static uint32_t config(uint32_t width, uint32_t height, uint32_t d_width, 
-	uint32_t d_height, uint32_t fullscreen, char *title, uint32_t format,const vo_tune_info_t *info)
-{
-	int i, stretchx, stretchy;
-	/* this allows to crop parts from incoming picture,
-	 * for easy 512x240 -> 352x240 */
-	/* These values must be multples of 2 */
-	if (format != IMGFMT_YV12 && format != IMGFMT_YUY2) {
-		printf("vo_zr called with wrong format");
-		exit(1);
-	}
-	stride = 2*width;
-	if (g.set) {
-		if (g.width%2 != 0 || g.height%2 != 0 ||
-				g.xoff%2 != 0 || g.yoff%2 != 0) {
+int zr_geometry_sane(geo_t *g, unsigned int width, unsigned int height) {
+	if (g->set) {
+		if (g->width%2 != 0 || g->height%2 != 0 ||
+				g->xoff%2 != 0 || g->yoff%2 != 0) {
 			mp_msg(MSGT_VO, MSGL_ERR, "zr: arguments in -zrcrop must be multiples of 2\n");
 			return 1;
 		}
-		if (g.width <= 0 || g.height <= 0 ||
-				g.xoff < 0 || g.yoff < 0) {
+		if (g->width <= 0 || g->height <= 0 || 
+				g->xoff < 0 || g->yoff < 0) {
 			mp_msg(MSGT_VO, MSGL_ERR, "zr: width and height must be positive and offset nonnegative\n");
 			return 1;
 		}
-		if (g.width + g.xoff > width) {
-			mp_msg(MSGT_VO, MSGL_ERR, "zr: width+xoffset (%d+%d>%d) is too big\n", g.width, g.xoff, width);
+		if (g->width + g->xoff > width) {
+			mp_msg(MSGT_VO, MSGL_ERR, "zr: width+xoffset (%d+%d>%d) is too big\n", g->width, g->xoff, width);
 			return 1;
 		}
-		if (g.height + g.yoff > height) {
-			mp_msg(MSGT_VO, MSGL_ERR, "zr: height+yoffset (%d+%d>%d) is too big\n", g.height, g.yoff, height);
+		if (g->height + g->yoff > height) {
+			mp_msg(MSGT_VO, MSGL_ERR, "zr: height+yoffset (%d+%d>%d) is too big\n", g->height, g->yoff, height);
 			return 1;
 		}
 	} else {
-		g.width = width;
-		g.height = height;
-		g.xoff = 0;
-		g.yoff = 0;
-		g.set = 1;
+		g->width = width;
+		g->height = height;
+		g->xoff = 0;
+		g->yoff = 0;
+		g->set = 1;
 	}
-	/* we must know the maximum resolution of the device
-	 * it differs for DC10+ and buz for example */
-	zoran_getcap(); /*must be called before init_zoran */
-	/* make the scaling decision
-	 * we are capable of stretching the image in the horizontal
-	 * direction by factors 1, 2 and 4
-	 * we can stretch the image in the vertical direction by a factor
-	 * of 1 and 2 AND we must decide about interlacing */
-	if (g.width > vc.maxwidth/2 || g.height > vc.maxheight/2) {
-		stretchx = 1;
-		stretchy = 1;
-		fields = 2;
-		if (vdec == 2) {
-			fields = 1;
-		} else if (vdec == 4) {
-			fields = 1;
-			stretchy = 2;
-		}
-		stretchx = hdec;
-	} else if (g.width > vc.maxwidth/4 || g.height > vc.maxheight/4) {
-		stretchx = 2;
-		stretchy = 1;
-		fields = 1;
-		if (vdec == 2) {
-			stretchy = 2;
-		} else if (vdec == 4) {
-			if (!zrfd) {
-				mp_msg(MSGT_VO, MSGL_WARN, "zr: vertical decimation too high, changing to 2 (use -zrfd to keep vdec=4)\n");
-				vdec = 2;
+	return 0;
+}
+
+
+static uint32_t config(uint32_t width, uint32_t height, uint32_t d_width, 
+	uint32_t d_height, uint32_t fullscreen, char *title, uint32_t format,const vo_tune_info_t *info)
+{
+	int i, tmp, stretchx, stretchy;
+	framenum = 0;
+	if (format != IMGFMT_YV12 && format != IMGFMT_YUY2) {
+		printf("vo_zr called with wrong format");
+		exit(1);
+	}
+	for (i = 0; i < zr_count; i++) {
+		zr_info_t *zr = &zr_info[i];
+		geo_t *g = &zr->g;
+
+		zr->stride = 2*width;
+		if (zr_geometry_sane(g, width, height)) return 1;
+
+		/* we must know the maximum resolution of the device
+	 	 * it differs for DC10+ and buz for example */
+		zoran_getcap(zr); /*must be called before init_zoran */
+		/* make the scaling decision
+		 * we are capable of stretching the image in the horizontal
+		 * direction by factors 1, 2 and 4
+		 * we can stretch the image in the vertical direction by a 
+		 * factor of 1 and 2 AND we must decide about interlacing */
+		if (g->width > zr->vc.maxwidth/2 || 
+				g->height > zr->vc.maxheight/2) {
+			stretchx = 1;
+			stretchy = 1;
+			zr->fields = 2;
+			if (zr->vdec == 2) {
+				zr->fields = 1;
+			} else if (zr->vdec == 4) {
+				zr->fields = 1;
+				stretchy = 2;
 			}
-			stretchy = 2;
-		}
-		if (hdec == 2) {
-			stretchx = 4;
-		} else if (hdec == 4){
-			if (!zrfd) {
-				mp_msg(MSGT_VO, MSGL_WARN, "zr: horizontal decimation too high, changing to 2 (use -zrfd to keep hdec=4)\n");
-				hdec = 2;
+			stretchx = zr->hdec;
+		} else if (g->width > zr->vc.maxwidth/4 || 
+				g->height > zr->vc.maxheight/4) {
+			stretchx = 2;
+			stretchy = 1;
+			zr->fields = 1;
+			if (zr->vdec == 2) {
+				stretchy = 2;
+			} else if (zr->vdec == 4) {
+				if (!zr->fd) {
+					mp_msg(MSGT_VO, MSGL_WARN, "zr: vertical decimation too high, changing to 2 (use -zrfd to keep vdec=4)\n");
+					zr->vdec = 2;
+				}
+				stretchy = 2;
+			}
+			if (zr->hdec == 2) {
+				stretchx = 4;
+			} else if (zr->hdec == 4){
+				if (!zr->fd) {
+					mp_msg(MSGT_VO, MSGL_WARN, "zr: horizontal decimation too high, changing to 2 (use -zrfd to keep hdec=4)\n");
+					zr->hdec = 2;
+				}
+				stretchx = 4;
 			}
+		} else {
+			/* output image is maximally stretched */
 			stretchx = 4;
+			stretchy = 2;
+			zr->fields = 1;
+			if (zr->vdec != 1 && !zr->fd) {
+				mp_msg(MSGT_VO, MSGL_WARN, "zr: vertical decimation too high, changing to 1 (use -zrfd to keep vdec=%d)\n", zr->vdec);
+				zr->vdec = 1;
+			}
+			if (zr->hdec != 1 && !zr->fd) {
+				mp_msg(MSGT_VO, MSGL_WARN, "zr: vertical decimation too high, changing to 1 (use -zrfd to keep hdec=%d)\n", zr->hdec);
+				zr->hdec = 1;
+			}
 		}
-	} else {
-		/* output image is maximally stretched */
-		stretchx = 4;
-		stretchy = 2;
-		fields = 1;
-		if (vdec != 1 && !zrfd) {
-			mp_msg(MSGT_VO, MSGL_WARN, "zr: vertical decimation too high, changing to 1 (use -zrfd to keep vdec=%d)\n", vdec);
-			vdec = 1;
+		/* It can be that the original frame was too big for display,
+		 * or that the width of the decimated image (for example) after
+		 * padding up to a multiple of 16 has become too big. (orig
+		 * width 720 (exactly right for the Buz) after decimation 360,
+		 * after padding up to a multiple of 16 368, display 736 -> too
+		 * large). In these situations we auto(re)crop. */
+		tmp = 16*((g->width - 1)/(zr->hdec*16) + 1);
+		if (stretchx*tmp > zr->vc.maxwidth) {
+			g->xoff += 2*((g->width - zr->hdec*(tmp-16))/4);
+			/* g->off must be a multiple of 2 */
+			g->width = zr->hdec*(tmp - 16);
+			g->set = 0; /* we abuse this field to 
+				       report that g has changed*/
 		}
-
-		if (hdec != 1 && !zrfd) {
-			mp_msg(MSGT_VO, MSGL_WARN, "zr: vertical decimation too high, changing to 1 (use -zrfd to keep hdec=%d)\n", hdec);
-			hdec = 1;
+		tmp = 8*zr->fields*((g->height - 1)/(zr->vdec*zr->fields*8)+1);
+		if (stretchy*tmp > zr->vc.maxheight) {
+			g->yoff += 2*((g->height - zr->vdec*
+						(tmp - 8*zr->fields))/4);
+			g->height = zr->vdec*(tmp - 8*zr->fields);
+			g->set = 0;
+		}
+		if (!g->set) 
+			mp_msg(MSGT_VO, MSGL_V, "zr: auto(re)cropping %dx%d+%d+%d to make the image fit on the screen\n", g->width, g->height, g->xoff, g->yoff);
+
+		/* the height must be a multiple of fields*8 and the width
+		 * must be a multiple of 16 */
+		/* add some black borders to make it so, and center the image*/
+		zr->image_height = zr->fields*8*((g->height/zr->vdec - 1)/
+				(zr->fields*8) + 1);
+		zr->image_width = (zr->hdec*16)*((g->width - 1)/(zr->hdec*16) + 1);
+		zr->off_y = (zr->image_height - g->height/zr->vdec)/2;
+		if (zr->off_y%2 != 0) zr->off_y++;
+		zr->off_y *= zr->image_width;
+		zr->off_c = zr->off_y/4;
+		zr->off_y += (zr->image_width - g->width)/2;
+		if (zr->off_y%2 != 0) zr->off_y--;
+		zr->off_c += (zr->image_width - g->width)/4;
+		zr->size = zr->image_width*zr->image_height;
+		mp_msg(MSGT_VO, MSGL_V, "zr: input: %dx%d, cropped: %dx%d, output: %dx%d, off_y=%d, off_c=%d\n", width, height, g->width, g->height, zr->image_width, zr->image_height, zr->off_y, zr->off_c);
+	
+		zr->image = malloc(2*zr->size); /* this buffer allows for YUV422 data,
+					 * so it is a bit too big for YUV420 */
+		if (!zr->image) {
+			mp_msg(MSGT_VO, MSGL_ERR, "zr: Memory exhausted\n");
+			return 1;
+		}
+		/* and make sure that the borders are _really_ black */
+		switch (format) {
+			case IMGFMT_YV12:
+				memset(zr->image, 0, zr->size);
+				memset(zr->image + zr->size, 0x80, zr->size/4);
+				memset(zr->image + 3*zr->size/2, 0x80, zr->size/4);
+				zr->y_data = zr->image;
+				zr->u_data = zr->image + zr->size;
+				zr->v_data = zr->image + 3*zr->size/2;
+	
+				zr->y_stride = zr->image_width;
+				zr->u_stride = zr->image_width/2;
+				zr->v_stride = zr->image_width/2;
+	
+				zr->j = jpeg_enc_init(zr->image_width/zr->hdec, 
+						zr->image_height/zr->fields,
+						zr->hdec, zr->y_stride*zr->fields,
+						zr->hdec, zr->u_stride*zr->fields,
+						zr->hdec, zr->v_stride*zr->fields, 
+						1, zr->quality, zr->bw);
+				break;
+			case IMGFMT_YUY2:
+				for (tmp = 0; tmp < 2*zr->size; tmp+=4) {
+					zr->image[tmp] = 0;
+					zr->image[tmp+1] = 0x80;
+					zr->image[tmp+2] = 0;
+					zr->image[tmp+3] = 0x80;
+				}
+	
+				zr->y_data = zr->image;
+				zr->u_data = zr->image + 1;
+				zr->v_data = zr->image + 3;
+	
+				zr->y_stride = 2*zr->image_width;
+				zr->u_stride = 2*zr->image_width;
+				zr->v_stride = 2*zr->image_width;
+	
+				zr->j = jpeg_enc_init(zr->image_width/zr->hdec, 
+						zr->image_height/zr->fields,
+						zr->hdec*2, 
+						zr->y_stride*zr->fields,
+						zr->hdec*4, 
+						zr->u_stride*zr->fields,
+						zr->hdec*4, 
+						zr->v_stride*zr->fields,
+						0, zr->quality, zr->bw);
+				break;
+			default:
+				mp_msg(MSGT_VO, MSGL_FATAL, "zr: internal inconsistency in vo_zr\n");
+		}
+	
+	
+		if (zr->j == NULL) {
+			mp_msg(MSGT_VO, MSGL_ERR, "zr: error initializing the jpeg encoder\n");
+			return 1;
+		}
+	
+		if (init_zoran(zr, stretchx, stretchy)) {
+			return 1;
 		}
-	}
-	/* It can be that the original frame was too big for display,
-	 * or that the width of the decimated image (for example) after
-	 * padding up to a multiple of 16 has become too big. (orig
-	 * width 720 (exactly right for the Buz) after decimation 360,
-	 * after padding up to a multiple of 16 368, display 736 -> too
-	 * large). In these situations we auto(re)crop. */
-	i = 16*((g.width - 1)/(hdec*16) + 1);
-	if (stretchx*i > vc.maxwidth) {
-		g.xoff += 2*((g.width - hdec*(i-16))/4);
-		/* g.off must be a multiple of 2 */
-		g.width = hdec*(i - 16);
-		g.set = 0; /* we abuse this field to report that g has changed*/
-	}
-	i = 8*fields*((g.height - 1)/(vdec*fields*8) + 1);
-	if (stretchy*i > vc.maxheight) {
-		g.yoff += 2*((g.height - vdec*(i - 8*fields))/4);
-		g.height = vdec*(i - 8*fields);
-		g.set = 0;
-	}
-	if (!g.set) 
-		mp_msg(MSGT_VO, MSGL_V, "zr: auto(re)cropping %dx%d+%d+%d to make the image fit on the screen\n", g.width, g.height, g.xoff, g.yoff);
-
-	/* the height must be a multiple of fields*8 and the width
-	 * must be a multiple of 16 */
-	/* add some black borders to make it so, and center the image*/
-	image_height = fields*8*((g.height/vdec - 1)/(fields*8) + 1);
-	image_width = (hdec*16)*((g.width - 1)/(hdec*16) + 1);
-	off_y = (image_height - g.height/vdec)/2;
-	if (off_y%2 != 0) off_y++;
-	off_y *= image_width;
-	off_c = off_y/4;
-	off_y += (image_width - g.width)/2;
-	if (off_y%2 != 0) off_y--;
-	off_c += (image_width - g.width)/4;
-	framenum = 0;
-	size = image_width*image_height;
-	mp_msg(MSGT_VO, MSGL_V, "zr: input: %dx%d, cropped: %dx%d, output: %dx%d, off_y=%d, off_c=%d\n", width, height, g.width, g.height, image_width, image_height, off_y, off_c);
 	
-	image = malloc(2*size); /* this buffer allows for YUV422 data,
-				 * so it is a bit too big for YUV420 */
-	if (!image) {
-		mp_msg(MSGT_VO, MSGL_ERR, "zr: Memory exhausted\n");
-		return 1;
-	}
-	/* and make sure that the borders are _really_ black */
-	switch (format) {
-		case IMGFMT_YV12:
-			memset(image, 0, image_width*image_height);
-			memset(image + size, 0x80, image_width*image_height/4);
-			memset(image + 3*size/2, 0x80, image_width*image_height/4);
-			y_data = image;
-			u_data = image + image_width*image_height;
-			v_data = image + 3*image_width*image_height/2;
-			
-			y_stride = image_width;
-			u_stride = image_width/2;
-			v_stride = image_width/2;
-
-			j = jpeg_enc_init(image_width/hdec, 
-					image_height/fields,
-					hdec, y_stride*fields,
-					hdec, u_stride*fields,
-					hdec, v_stride*fields, 
-					1, quality, bw);
-			break;
-		case IMGFMT_YUY2:
-			for (i = 0; i < 2*size; i+=4) {
-				image[i] = 0;
-				image[i+1] = 0x80;
-				image[i+2] = 0;
-				image[i+3] = 0x80;
-			}
-
-			y_data = image;
-			u_data = image + 1;
-			v_data = image + 3;
-
-			y_stride = 2*image_width;
-			u_stride = 2*image_width;
-			v_stride = 2*image_width;
-
-			j = jpeg_enc_init(image_width/hdec, 
-					image_height/fields,
-					hdec*2, y_stride*fields,
-					hdec*4, u_stride*fields,
-					hdec*4, v_stride*fields,
-					0, quality, bw);
-			break;
-		default:
-			mp_msg(MSGT_VO, MSGL_FATAL, "zr: internal inconsistency in vo_zr\n");
-	}
-
-
-	if (j == NULL) {
-		mp_msg(MSGT_VO, MSGL_ERR, "zr: error initializing the jpeg encoder\n");
-		return 1;
-	}
-
-	if (init_zoran(stretchx, stretchy)) {
-		return 1;
 	}
-
 	return 0;
 }
 
@@ -438,23 +481,27 @@ static void draw_osd(void) {
 }
 
 static void flip_page (void) {
-	int i, k;
+	int i, j, k;
 	//FILE *fp;
 	//char filename[100];
 	/* do we have a free buffer? */
-	if (queue-synco < zrq.count) {
-		frame = queue;
-	} else {
-		if (ioctl(vdes, MJPIOC_SYNC, &zs) < 0) 
-			mp_msg(MSGT_VO, MSGL_ERR, "zr: error waiting for buffers to become free\n"); 
-		frame = zs.frame;
-		synco++;
+	for (j = 0; j < zr_count; j++) {
+		zr_info_t *zr = &zr_info[j];
+		if (zr->queue-zr->synco < MJPEG_NBUFFERS) {
+			zr->frame = zr->queue;
+		} else {
+			if (ioctl(zr->vdes, MJPIOC_SYNC, &zr->zs) < 0) 
+				mp_msg(MSGT_VO, MSGL_ERR, "zr: error waiting for buffers to become free\n"); 
+			zr->frame = zr->zs.frame;
+			zr->synco++;
+		}
+		k=0;
+		for (i = 0; i < zr->fields; i++) 
+			k+=jpeg_enc_frame(zr->j, zr->y_data + i*zr->y_stride, 
+					zr->u_data + i*zr->u_stride, 
+					zr->v_data + i*zr->v_stride, 
+					zr->buf+zr->frame*MJPEG_SIZE+k);
 	}
-	k=0;
-	for (i = 0; i < fields; i++) 
-		k+=jpeg_enc_frame(j, y_data + i*y_stride, 
-				u_data + i*u_stride, v_data + i*v_stride, 
-				buf+frame*zrq.size+k);
 	/* Warning: Only the first jpeg image contains huffman- and 
 	 * quantisation tables, so don't expect files other than
 	 * test0001.jpg to be readable */
@@ -467,25 +514,31 @@ static void flip_page (void) {
 	fread(buf+frame*zrq.size, 1, 2126, fp);
 	fclose(fp);*/
 	
-	if (ioctl(vdes, MJPIOC_QBUF_PLAY, &frame) < 0) 
-		mp_msg(MSGT_VO, MSGL_ERR,
-				"zr: error queueing buffer for playback\n");
-	queue++;
+	for (j = 0; j < zr_count; j++) {
+		zr_info_t *zr = &zr_info[j];
+		if (ioctl(zr->vdes, MJPIOC_QBUF_PLAY, &zr->frame) < 0) 
+			mp_msg(MSGT_VO, MSGL_ERR, "zr: error queueing buffer for playback\n");
+		zr->queue++;
+	}
 
 	framenum++;
 	return;
 }
 
 static uint32_t draw_frame(uint8_t * src[]) {
-	int i;
+	int i, j;
 	char *source, *dest;
 	//printf("draw frame called\n");
-	source = src[0] + 2*g.yoff*vdec*stride + 2*g.xoff;
-	dest = image + 2*off_y;
-	for (i = 0; i < g.height/vdec; i++) {
-		memcpy(dest, source, image_width*2);
-		dest += 2*image_width;
-		source += vdec*stride;
+	for (j = 0; j < zr_count; j++) {
+		zr_info_t *zr = &zr_info[j];
+		geo_t *g = &zr->g;
+		source = src[0] + 2*g->yoff*zr->vdec*zr->stride + 2*g->xoff;
+		dest = zr->image + 2*zr->off_y;
+		for (i = 0; i < g->height/zr->vdec; i++) {
+			memcpy(dest, source, zr->image_width*2);
+			dest += 2*zr->image_width;
+			source += zr->vdec*zr->stride;
+		}
 	}
 	return 0;
 }
@@ -497,8 +550,12 @@ static uint32_t query_format(uint32_t format) {
 }
 
 static void uninit(void) {
-	jpeg_enc_uninit(j);
-	uninit_zoran();
+	int j;
+	mp_msg(MSGT_VO, MSGL_V, "zr: uninit called\n");
+	for (j = 0; j < zr_count; j++) {
+		jpeg_enc_uninit(zr_info[j].j);
+		uninit_zoran(&zr_info[j]);
+	}
 }
 
 static void check_events(void) {
@@ -506,70 +563,75 @@ static void check_events(void) {
 
 
 static uint32_t draw_slice(uint8_t *srcimg[], int stride[],
-		int w, int h, int x, int y) {
-	int i;
+		int wf, int hf, int xf, int yf) {
+	int i, j, w, h, x, y;
 	/* Apply 'geometry', crop unwanted parts */
 	uint8_t *dst;
-	uint8_t *src;
 	//printf("before: w=%d, h=%d, x=%d, y=%d, src0=%p, src1=%p, src2=%p\n", w, h, x, y, srcimg[0], srcimg[1], srcimg[2]);
-	if (x < g.xoff) {
-		srcimg[0] += g.xoff - x;
-		srcimg[1] += (g.xoff - x)/2;
-		srcimg[2] += (g.xoff - x)/2;
-		w -= g.xoff - x;
-		if (w < 0) return 0;
-		x = 0 /*g.xoff*/;
-	} else {
-		x -= g.xoff;
-	}
-	if (x + w > g.width) {
-		w = g.width - x;
-		if (w < 0) return 0;
-	}
-	if (y < g.yoff) {
-		srcimg[0] += (g.yoff - y)*stride[0];
-		srcimg[1] += ((g.yoff - y)/2)*stride[1];
-		srcimg[2] += ((g.yoff - y)/2)*stride[2];
-		h -= g.yoff - y;
-		if (h < 0) return 0;
-		y = 0;
-	} else {
-		y -= g.yoff;
-	}
-	if (y + h > g.height) {
-		h = g.height - y;
-		if (h < 0) return 0;
-	}
-	//printf("after: w=%d, h=%d, x=%d, y=%d, src0=%p, src1=%p, src2=%p\n", w, h, x, y, srcimg[0], srcimg[1], srcimg[2]);
-	dst=image + off_y + image_width*(y/vdec)+x;
-	src=srcimg[0];
-	// copy Y:
-	for (i = 0; i < h; i++) {
-		if ((i + x)%vdec == 0) {
-			memcpy(dst,src,w);
-			dst+=image_width;
-		}
-		src+=stride[0];
-
-	}
-	if (!bw) {
-    		// copy U+V:
+	for (j = 0; j < zr_count; j++) {
+		uint8_t *src=srcimg[0];
 		uint8_t *src1=srcimg[1];
 		uint8_t *src2=srcimg[2];
-		uint8_t *dst1=image + size + off_c+ (y/(vdec*2))*image_width/2+(x/2);
-		uint8_t *dst2=image + 3*size/2 + off_c + 
-			(y/(vdec*2))*image_width/2+(x/2);
-		for (i = 0; i< h/2; i++) {
-			if ((i+x/2)%vdec == 0) {
-				memcpy(dst1,src1,w/2);
-				memcpy(dst2,src2,w/2);
-				dst1+=image_width/2;
-				dst2+=image_width/2;
+		zr_info_t *zr = &zr_info[j];
+		geo_t *g = &zr->g;
+		w = wf; h = hf; x = xf; y = yf;
+		if (x < g->xoff) {
+			src += g->xoff - x;
+			src1 += (g->xoff - x)/2;
+			src2 += (g->xoff - x)/2;
+			w -= g->xoff - x;
+			if (w < 0) break; //return 0;
+			x = 0 /*g.xoff*/;
+		} else {
+			x -= g->xoff;
+		}
+		if (x + w > g->width) {
+			w = g->width - x;
+			if (w < 0) break; //return 0;
+		}
+		if (y < g->yoff) {
+			src += (g->yoff - y)*stride[0];
+			src1 += ((g->yoff - y)/2)*stride[1];
+			src2 += ((g->yoff - y)/2)*stride[2];
+			h -= g->yoff - y;
+			if (h < 0) break; //return 0;
+			y = 0;
+		} else {
+			y -= g->yoff;
+		}
+		if (y + h > g->height) {
+			h = g->height - y;
+			if (h < 0) break; //return 0;
+		}
+		//printf("after: w=%d, h=%d, x=%d, y=%d, src0=%p, src1=%p, src2=%p\n", w, h, x, y, srcimg[0], srcimg[1], srcimg[2]);
+		dst=zr->image + zr->off_y + zr->image_width*(y/zr->vdec)+x;
+		// copy Y:
+		for (i = 0; i < h; i++) {
+			if ((i + x)%zr->vdec == 0) {
+				memcpy(dst,src,w);
+				dst+=zr->image_width;
 			}
-			src1+=stride[1];
-			src2+=stride[2];
+			src+=stride[0];
+
 		}
-    	}
+		if (!zr->bw) {
+    			// copy U+V:
+			uint8_t *dst1=zr->image + zr->size + zr->off_c+ (y/(zr->vdec*2))*zr->image_width/2+(x/2);
+			uint8_t *dst2=zr->image + 3*zr->size/2 + zr->off_c + 
+					(y/(zr->vdec*2))*
+					zr->image_width/2+(x/2);
+			for (i = 0; i< h/2; i++) {
+				if ((i+x/2)%zr->vdec == 0) {
+					memcpy(dst1,src1,w/2);
+					memcpy(dst2,src2,w/2);
+					dst1+=zr->image_width/2;
+					dst2+=zr->image_width/2;
+				}
+				src1+=stride[1];
+				src2+=stride[2];
+			}
+    		}
+	}
  	return 0;
 }
 
@@ -578,66 +640,86 @@ static uint32_t draw_slice(uint8_t *srcimg[], int stride[],
 int
 vo_zr_parseoption(struct config * conf, char *opt, char *param){
     /* got an option starting with zr */
-    char *x, *help;
+    zr_info_t *zr = &zr_info[zr_parsing];
     int i;
     /* do WE need it ?, always */
     if (!strcasecmp(opt, "zrdev")) {
 	if (param == NULL) return ERR_MISSING_PARAM;
 	//if ((i=getcolor(param))==-1) return ERR_OUT_OF_RANGE;
 	//aaopt_osdcolor=i;
-	device = malloc(strlen(param)+1);
-	strcpy(device, param);
-	mp_msg(MSGT_VO, MSGL_V, "zr: using device %s\n", device);
+	free(zr->device);
+	zr->device = malloc(strlen(param)+1);
+	strcpy(zr->device, param);
+	mp_msg(MSGT_VO, MSGL_V, "zr: using device %s\n", zr->device);
 	return 1;
     } else if (!strcasecmp(opt, "zrbw")) {
 	    if (param != NULL) {
 		    return ERR_OUT_OF_RANGE;
 	    }
-	    bw = 1;
+	    zr->bw = 1;
 	    return 1;
     } else if (!strcasecmp(opt, "zrfd")) {
 	    if (param != NULL) {
 		    return ERR_OUT_OF_RANGE;
 	    }
-	    zrfd = 1;
+	    zr->fd = 1;
 	    return 1;
     } else if (!strcasecmp(opt, "zrcrop")){
+        geo_t *g = &zr->g;
+	if (g->set == 1) {
+		zr_parsing++;
+		zr_count++;
+    		zr = &zr_info[zr_parsing];
+        	g = &zr->g;
+		if (zr_count > 4) {
+			mp_msg(MSGT_VO, MSGL_ERR, "zr: too many simultaneus display devices requested (max. is 4)\n");
+			return ERR_OUT_OF_RANGE;
+		}
+	}
 	if (param == NULL) return ERR_MISSING_PARAM;
-	if (sscanf(param, "%dx%d+%d+%d", &g.width, &g.height, 
-				&g.xoff, &g.yoff) != 4) {
-		g.xoff = 0; g.yoff = 0;
-		if (sscanf(param, "%dx%d", &g.width, &g.height) != 2) {
+	if (sscanf(param, "%dx%d+%d+%d", &g->width, &g->height, 
+				&g->xoff, &g->yoff) != 4) {
+		g->xoff = 0; g->yoff = 0;
+		if (sscanf(param, "%dx%d", &g->width, &g->height) != 2) {
 			mp_msg(MSGT_VO, MSGL_ERR, "zr: argument to -zrcrop must be of the form 352x288+16+0\n");
 			return ERR_OUT_OF_RANGE;
 		}
 	}
-	g.set = 1;
+	g->set = 1;
 	mp_msg(MSGT_VO, MSGL_V, "zr: cropping %s\n", param);
 	return 1;
     }else if (!strcasecmp(opt, "zrhdec")) {
         i = atoi(param);
 	if (i != 1 && i != 2 && i != 4) return ERR_OUT_OF_RANGE;
-	hdec = i;
+	zr->hdec = i;
 	return 1;
     }else if (!strcasecmp(opt, "zrvdec")) {
         i = atoi(param);
 	if (i != 1 && i != 2 && i != 4) return ERR_OUT_OF_RANGE;
-	vdec = i;
+	zr->vdec = i;
+	return 1;
+    }else if (!strcasecmp(opt, "zrxdoff")) {
+        i = atoi(param);
+	zr->xdoff = i;
+	return 1;
+    }else if (!strcasecmp(opt, "zrydoff")) {
+        i = atoi(param);
+	zr->ydoff = i;
 	return 1;
     }else if (!strcasecmp(opt, "zrquality")) {
         i = atoi(param);
 	if (i < 1 || i > 20) return ERR_OUT_OF_RANGE;
-	quality = i;
+	zr->quality = i;
 	return 1;
     }else if (!strcasecmp(opt, "zrnorm")) {
 	if (param == NULL) return ERR_MISSING_PARAM;
 	if (!strcasecmp(param, "NTSC")) {
             mp_msg(MSGT_VO, MSGL_V, "zr: Norm set to NTSC\n");
-            norm = VIDEO_MODE_NTSC;
+            zr->norm = VIDEO_MODE_NTSC;
 	    return 1;
 	} else if (!strcasecmp(param, "PAL")) {
 	    mp_msg(MSGT_VO, MSGL_V, "zr: Norm set to PAL\n");
-            norm = VIDEO_MODE_PAL;
+            zr->norm = VIDEO_MODE_PAL;
 	    return 1;
 	} else {
            return ERR_OUT_OF_RANGE;
@@ -658,10 +740,23 @@ vo_zr_parseoption(struct config * conf, char *opt, char *param){
 		    "              this switch allows you to see the effects\n"
 		    "              of too much decimation\n"
 		    "  -zrbw       display in black&white (speed increase)\n"
+		    "  -zrxdoff    x offset from upper-left of TV screen (default is 'centered')\n"
+		    "  -zrydoff    y offset from upper-left of TV screen (default is 'centered')\n"
 		    "  -zrquality  jpeg compression quality [BEST] 1 - 20 [VERY BAD]\n"
-		    "  -zrdev      playback device (example -zrdev /dev/video1\n"
-		    "  -zrnorm     specify norm PAL/NTSC [dev: leave at current setting]\n"
+		    "  -zrdev      playback device (example -zrdev /dev/video1)\n"
+		    "  -zrnorm     specify norm PAL/NTSC (default: leave at current setting)\n"
 		    "\n"