Add support for VBI capture from /dev/vbi.

This will allow software teletext/intercast/subtitles decoding
while watching a TV station.

Based on code from Hiroki Mori <mori@infocity.co.jp> but reworked by
myself.

1 files changed, 13 insertions, 2 deletions

diff --git a/sys/dev/bktr/bktr_reg.h b/sys/dev/bktr/bktr_reg.h
index 88c4883..2364f23 100644
--- a/sys/dev/bktr/bktr_reg.h
+++ b/sys/dev/bktr/bktr_reg.h
@@ -28,7 +28,7 @@
  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  *
- * $Id: brktree_reg.h,v 1.24 1999/01/23 11:28:16 roger Exp $
+ * $Id: brktree_reg.h,v 1.25 1999/02/08 11:55:30 roger Exp $
  */
 #ifndef PCI_LATENCY_TIMER
 #define	PCI_LATENCY_TIMER		0x0c	/* pci timer register */
@@ -373,6 +373,8 @@ struct format_params {
   u_char adelay, bdelay;
   /* Iform XTSEL value */
   int iform_xtsel;
+  /* VBI number of lines per field, and number of samples per line */
+  int vbi_num_lines, vbi_num_samples;
 };
 
 #ifdef __FreeBSD__
@@ -401,6 +403,11 @@ struct bktr_softc {
     pcici_t	tag;		/* PCI tag, for doing PCI commands */
     vm_offset_t bigbuf;		/* buffer that holds the captured image */
     int		alloc_pages;	/* number of pages in bigbuf */
+    vm_offset_t vbidata;	/* RISC program puts VBI data from the current frame here */
+    vm_offset_t vbibuffer;	/* Circular buffer holding VBI data for the user */
+    int         vbiinsert;      /* Position for next write into circular buffer */
+    int         vbistart;       /* Position of last read from circular buffer */
+    int         vbisize;        /* Number of bytes in the circular buffer */
     struct proc	*proc;		/* process to receive raised signal */
     int		signal;		/* signal to send to process */
     int		clr_on_start;	/* clear cap buf on capture start? */
@@ -473,9 +480,13 @@ struct bktr_softc {
 #define	METEOR_WANT_TS		0x08000000	/* time-stamp a frame */
 #define METEOR_RGB		0x20000000	/* meteor rgb unit */
 #define METEOR_FIELD_MODE	0x80000000
-    u_char	tflags;
+    u_char	tflags;				/* Tuner flags (/dev/tuner) */
 #define	TUNER_INITALIZED	0x00000001
 #define	TUNER_OPEN		0x00000002 
+    u_char      vbiflags;			/* VBI flags (/dev/vbi) */
+#define VBI_INITALIZED          0x00000001
+#define VBI_OPEN                0x00000002
+#define VBI_CAPTURE             0x00000004
     u_short	fps;		/* frames per second */
     struct meteor_video video;
     struct TVTUNER	tuner;