V4L/DVB (11042): v4l2-api: Add definitions for V4L2_MPEG_STREAM_VBI_FMT_IVTV payloads

This addition to the v4l2-api add definitions for the constants and
data structures used for sliced VBI data insertion into MPEG streams triggered
by V4L2_MPEG_STREAM_VBI_FMT_IVTV.  This simply declares what the ivtv and
cx18 drivers and MythTV have already been doing and provides a proper data
structure definition to user space.

Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 47 insertions, 0 deletions

diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index 78ba0755ffb3..61f1a4921afd 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -1348,6 +1348,53 @@ struct v4l2_sliced_vbi_data {
 };
 
 /*
+ * Sliced VBI data inserted into MPEG Streams
+ */
+
+/*
+ * V4L2_MPEG_STREAM_VBI_FMT_IVTV:
+ *
+ * Structure of payload contained in an MPEG 2 Private Stream 1 PES Packet in an
+ * MPEG-2 Program Pack that contains V4L2_MPEG_STREAM_VBI_FMT_IVTV Sliced VBI
+ * data
+ *
+ * Note, the MPEG-2 Program Pack and Private Stream 1 PES packet header
+ * definitions are not included here.  See the MPEG-2 specifications for details
+ * on these headers.
+ */
+
+/* Line type IDs */
+#define V4L2_MPEG_VBI_IVTV_TELETEXT_B     (1)
+#define V4L2_MPEG_VBI_IVTV_CAPTION_525    (4)
+#define V4L2_MPEG_VBI_IVTV_WSS_625        (5)
+#define V4L2_MPEG_VBI_IVTV_VPS            (7)
+
+struct v4l2_mpeg_vbi_itv0_line {
+        __u8 id;        /* One of V4L2_MPEG_VBI_IVTV_* above */
+        __u8 data[42];  /* Sliced VBI data for the line */
+} __attribute__ ((packed));
+
+struct v4l2_mpeg_vbi_itv0 {
+        __le32 linemask[2]; /* Bitmasks of VBI service lines present */
+        struct v4l2_mpeg_vbi_itv0_line line[35];
+} __attribute__ ((packed));
+
+struct v4l2_mpeg_vbi_ITV0 {
+        struct v4l2_mpeg_vbi_itv0_line line[36];
+} __attribute__ ((packed));
+
+#define V4L2_MPEG_VBI_IVTV_MAGIC0       "itv0"
+#define V4L2_MPEG_VBI_IVTV_MAGIC1       "ITV0"
+
+struct v4l2_mpeg_vbi_fmt_ivtv {
+        __u8 magic[4];
+        union {
+                struct v4l2_mpeg_vbi_itv0 itv0;
+                struct v4l2_mpeg_vbi_ITV0 ITV0;
+        };
+} __attribute__ ((packed));
+
+/*
  *      A G G R E G A T E   S T R U C T U R E S
  */