V4L/DVB (5289): Add support for video output overlays.

Add V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY support.
Also add support for local and global alpha overlays.
Add new field enums V4L2_FIELD_INTERLACED_TB and V4L2_FIELD_INTERLACED_BT.
These changes are needed to support the ivtv On Screen Display features.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

4 files changed, 79 insertions, 23 deletions

diff --git a/drivers/media/video/v4l2-common.c b/drivers/media/video/v4l2-common.c
index 43a8467f0209..740ea5a9202f 100644
--- a/drivers/media/video/v4l2-common.c
+++ b/drivers/media/video/v4l2-common.c
@@ -260,6 +260,8 @@ char *v4l2_field_names[] = {
         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
         [V4L2_FIELD_ALTERNATE]  = "alternate",
+        [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
+        [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 };
 
 char *v4l2_type_names[] = {
@@ -269,7 +271,8 @@ char *v4l2_type_names[] = {
         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
-        [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "slicec-vbi-out",
+        [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
+        [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "video-out-over",
 };
 
 
diff --git a/drivers/media/video/videodev.c b/drivers/media/video/videodev.c
index 011938fb7e0e..5c9f2116d7bf 100644
--- a/drivers/media/video/videodev.c
+++ b/drivers/media/video/videodev.c
@@ -318,6 +318,7 @@ static char *v4l2_type_names_FIXME[] = {
         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-capture",
+        [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "video-out-over",
         [V4L2_BUF_TYPE_PRIVATE]            = "private",
 };
 
@@ -330,6 +331,8 @@ static char *v4l2_field_names_FIXME[] = {
         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
         [V4L2_FIELD_ALTERNATE]  = "alternate",
+        [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
+        [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 };
 
 #define prt_names(a,arr) (((a)>=0)&&((a)<ARRAY_SIZE(arr)))?arr[a]:"unknown"
@@ -411,6 +414,10 @@ static int check_fmt (struct video_device *vfd, enum v4l2_buf_type type)
                 if (vfd->vidioc_try_fmt_vbi_output)
                         return (0);
                 break;
+        case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
+                if (vfd->vidioc_try_fmt_output_overlay)
+                        return (0);
+                break;
         case V4L2_BUF_TYPE_PRIVATE:
                 if (vfd->vidioc_try_fmt_type_private)
                         return (0);
@@ -525,6 +532,10 @@ static int __video_do_ioctl(struct inode *inode, struct file *file,
                                 ret=vfd->vidioc_enum_fmt_vbi_output(file,
                                                                 fh, f);
                         break;
+                case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
+                        if (vfd->vidioc_enum_fmt_output_overlay)
+                                ret=vfd->vidioc_enum_fmt_output_overlay(file, fh, f);
+                        break;
                 case V4L2_BUF_TYPE_PRIVATE:
                         if (vfd->vidioc_enum_fmt_type_private)
                                 ret=vfd->vidioc_enum_fmt_type_private(file,
@@ -582,6 +593,10 @@ static int __video_do_ioctl(struct inode *inode, struct file *file,
                                 ret=vfd->vidioc_g_fmt_video_output(file,
                                                                 fh, f);
                         break;
+                case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
+                        if (vfd->vidioc_g_fmt_output_overlay)
+                                ret=vfd->vidioc_g_fmt_output_overlay(file, fh, f);
+                        break;
                 case V4L2_BUF_TYPE_VBI_OUTPUT:
                         if (vfd->vidioc_g_fmt_vbi_output)
                                 ret=vfd->vidioc_g_fmt_vbi_output(file, fh, f);
@@ -630,6 +645,10 @@ static int __video_do_ioctl(struct inode *inode, struct file *file,
                                 ret=vfd->vidioc_s_fmt_video_output(file,
                                                                 fh, f);
                         break;
+                case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
+                        if (vfd->vidioc_s_fmt_output_overlay)
+                                ret=vfd->vidioc_s_fmt_output_overlay(file, fh, f);
+                        break;
                 case V4L2_BUF_TYPE_VBI_OUTPUT:
                         if (vfd->vidioc_s_fmt_vbi_output)
                                 ret=vfd->vidioc_s_fmt_vbi_output(file,
@@ -680,6 +699,10 @@ static int __video_do_ioctl(struct inode *inode, struct file *file,
                                 ret=vfd->vidioc_try_fmt_video_output(file,
                                                                 fh, f);
                         break;
+                case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
+                        if (vfd->vidioc_try_fmt_output_overlay)
+                                ret=vfd->vidioc_try_fmt_output_overlay(file, fh, f);
+                        break;
                 case V4L2_BUF_TYPE_VBI_OUTPUT:
                         if (vfd->vidioc_try_fmt_vbi_output)
                                 ret=vfd->vidioc_try_fmt_vbi_output(file,
diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index e4ed5667a55d..a08ef2c16300 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -96,44 +96,60 @@
  *      E N U M S
  */
 enum v4l2_field {
-        V4L2_FIELD_ANY        = 0, /* driver can choose from none,
-                                      top, bottom, interlaced
-                                      depending on whatever it thinks
-                                      is approximate ... */
-        V4L2_FIELD_NONE       = 1, /* this device has no fields ... */
-        V4L2_FIELD_TOP        = 2, /* top field only */
-        V4L2_FIELD_BOTTOM     = 3, /* bottom field only */
-        V4L2_FIELD_INTERLACED = 4, /* both fields interlaced */
-        V4L2_FIELD_SEQ_TB     = 5, /* both fields sequential into one
-                                      buffer, top-bottom order */
-        V4L2_FIELD_SEQ_BT     = 6, /* same as above + bottom-top order */
-        V4L2_FIELD_ALTERNATE  = 7, /* both fields alternating into
-                                      separate buffers */
+        V4L2_FIELD_ANY           = 0, /* driver can choose from none,
+                                         top, bottom, interlaced
+                                         depending on whatever it thinks
+                                         is approximate ... */
+        V4L2_FIELD_NONE          = 1, /* this device has no fields ... */
+        V4L2_FIELD_TOP           = 2, /* top field only */
+        V4L2_FIELD_BOTTOM        = 3, /* bottom field only */
+        V4L2_FIELD_INTERLACED    = 4, /* both fields interlaced */
+        V4L2_FIELD_SEQ_TB        = 5, /* both fields sequential into one
+                                         buffer, top-bottom order */
+        V4L2_FIELD_SEQ_BT        = 6, /* same as above + bottom-top order */
+        V4L2_FIELD_ALTERNATE     = 7, /* both fields alternating into
+                                         separate buffers */
+        V4L2_FIELD_INTERLACED_TB = 8, /* both fields interlaced, top field
+                                         first and the top field is
+                                         transmitted first */
+        V4L2_FIELD_INTERLACED_BT = 9, /* both fields interlaced, top field
+                                         first and the bottom field is
+                                         transmitted first */
 };
 #define V4L2_FIELD_HAS_TOP(field)       \
         ((field) == V4L2_FIELD_TOP      ||\
          (field) == V4L2_FIELD_INTERLACED ||\
+         (field) == V4L2_FIELD_INTERLACED_TB ||\
+         (field) == V4L2_FIELD_INTERLACED_BT ||\
          (field) == V4L2_FIELD_SEQ_TB   ||\
          (field) == V4L2_FIELD_SEQ_BT)
 #define V4L2_FIELD_HAS_BOTTOM(field)    \
         ((field) == V4L2_FIELD_BOTTOM   ||\
          (field) == V4L2_FIELD_INTERLACED ||\
+         (field) == V4L2_FIELD_INTERLACED_TB ||\
+         (field) == V4L2_FIELD_INTERLACED_BT ||\
          (field) == V4L2_FIELD_SEQ_TB   ||\
          (field) == V4L2_FIELD_SEQ_BT)
 #define V4L2_FIELD_HAS_BOTH(field)      \
         ((field) == V4L2_FIELD_INTERLACED ||\
-         (field) == V4L2_FIELD_SEQ_TB   ||\
+         (field) == V4L2_FIELD_INTERLACED_TB ||\
+         (field) == V4L2_FIELD_INTERLACED_BT ||\
+         (field) == V4L2_FIELD_SEQ_TB ||\
          (field) == V4L2_FIELD_SEQ_BT)
 
 enum v4l2_buf_type {
-        V4L2_BUF_TYPE_VIDEO_CAPTURE      = 1,
-        V4L2_BUF_TYPE_VIDEO_OUTPUT       = 2,
-        V4L2_BUF_TYPE_VIDEO_OVERLAY      = 3,
-        V4L2_BUF_TYPE_VBI_CAPTURE        = 4,
-        V4L2_BUF_TYPE_VBI_OUTPUT         = 5,
-        V4L2_BUF_TYPE_SLICED_VBI_CAPTURE = 6,
-        V4L2_BUF_TYPE_SLICED_VBI_OUTPUT  = 7,
-        V4L2_BUF_TYPE_PRIVATE            = 0x80,
+        V4L2_BUF_TYPE_VIDEO_CAPTURE        = 1,
+        V4L2_BUF_TYPE_VIDEO_OUTPUT         = 2,
+        V4L2_BUF_TYPE_VIDEO_OVERLAY        = 3,
+        V4L2_BUF_TYPE_VBI_CAPTURE          = 4,
+        V4L2_BUF_TYPE_VBI_OUTPUT           = 5,
+        V4L2_BUF_TYPE_SLICED_VBI_CAPTURE   = 6,
+        V4L2_BUF_TYPE_SLICED_VBI_OUTPUT    = 7,
+#if 1
+        /* Experimental */
+        V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY = 8,
+#endif
+        V4L2_BUF_TYPE_PRIVATE              = 0x80,
 };
 
 enum v4l2_ctrl_type {
@@ -228,6 +244,7 @@ struct v4l2_capability
 #define V4L2_CAP_SLICED_VBI_OUTPUT      0x00000080  /* Is a sliced VBI output device */
 #define V4L2_CAP_RDS_CAPTURE            0x00000100  /* RDS data capture */
 #define V4L2_CAP_VIDEO_OUTPUT_POS       0x00000200  /* Video output can have x,y coords */
+#define V4L2_CAP_VIDEO_OUTPUT_OVERLAY   0x00000400  /* Can do video output overlay */
 
 #define V4L2_CAP_TUNER                  0x00010000  /* has a tuner */
 #define V4L2_CAP_AUDIO                  0x00020000  /* has audio support */
@@ -599,10 +616,14 @@ struct v4l2_framebuffer
 #define V4L2_FBUF_CAP_CHROMAKEY         0x0002
 #define V4L2_FBUF_CAP_LIST_CLIPPING     0x0004
 #define V4L2_FBUF_CAP_BITMAP_CLIPPING   0x0008
+#define V4L2_FBUF_CAP_LOCAL_ALPHA       0x0010
+#define V4L2_FBUF_CAP_GLOBAL_ALPHA      0x0020
 /*  Flags for the 'flags' field. */
 #define V4L2_FBUF_FLAG_PRIMARY          0x0001
 #define V4L2_FBUF_FLAG_OVERLAY          0x0002
 #define V4L2_FBUF_FLAG_CHROMAKEY        0x0004
+#define V4L2_FBUF_FLAG_LOCAL_ALPHA      0x0008
+#define V4L2_FBUF_FLAG_GLOBAL_ALPHA     0x0010
 
 struct v4l2_clip
 {
@@ -618,6 +639,7 @@ struct v4l2_window
         struct v4l2_clip        __user *clips;
         __u32                   clipcount;
         void                    __user *bitmap;
+        __u8                    global_alpha;
 };
 
 /*
diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h
index 1dd3d3239ecf..2693f3ae6ffb 100644
--- a/include/media/v4l2-dev.h
+++ b/include/media/v4l2-dev.h
@@ -127,6 +127,8 @@ struct video_device
                                             struct v4l2_fmtdesc *f);
         int (*vidioc_enum_fmt_video_output)(struct file *file, void *fh,
                                             struct v4l2_fmtdesc *f);
+        int (*vidioc_enum_fmt_output_overlay) (struct file *file, void *fh,
+                                            struct v4l2_fmtdesc *f);
         int (*vidioc_enum_fmt_vbi_output)  (struct file *file, void *fh,
                                             struct v4l2_fmtdesc *f);
         int (*vidioc_enum_fmt_type_private)(struct file *file, void *fh,
@@ -145,6 +147,8 @@ struct video_device
                                         struct v4l2_format *f);
         int (*vidioc_g_fmt_video_output)(struct file *file, void *fh,
                                         struct v4l2_format *f);
+        int (*vidioc_g_fmt_output_overlay) (struct file *file, void *fh,
+                                        struct v4l2_format *f);
         int (*vidioc_g_fmt_type_private)(struct file *file, void *fh,
                                         struct v4l2_format *f);
 
@@ -162,6 +166,8 @@ struct video_device
                                         struct v4l2_format *f);
         int (*vidioc_s_fmt_video_output)(struct file *file, void *fh,
                                         struct v4l2_format *f);
+        int (*vidioc_s_fmt_output_overlay) (struct file *file, void *fh,
+                                        struct v4l2_format *f);
         int (*vidioc_s_fmt_type_private)(struct file *file, void *fh,
                                         struct v4l2_format *f);
 
@@ -178,6 +184,8 @@ struct video_device
                                           struct v4l2_format *f);
         int (*vidioc_try_fmt_video_output)(struct file *file, void *fh,
                                           struct v4l2_format *f);
+        int (*vidioc_try_fmt_output_overlay)(struct file *file, void *fh,
+                                          struct v4l2_format *f);
         int (*vidioc_try_fmt_type_private)(struct file *file, void *fh,
                                           struct v4l2_format *f);