V4L/DVB (4672): Frame format enumeration (1/2)

Add VIDIOC_ENUM_FRAMESIZES and VIDIOC_ENUM_FRAMEINTERVALS ioctls to enumerate 
supported frame sizes and frame intervals.

Signed-off-by: Martin Rubli <martin.rubli@epfl.ch>
Signed-off-by: Laurent Pinchart <laurent.pinchart@skynet.be>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 75 insertions, 0 deletions

diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index 44c59da26ed2..253a7ed3abb3 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -277,6 +277,79 @@ struct v4l2_fmtdesc
 #define V4L2_FMT_FLAG_COMPRESSED 0x0001
 
 /*
+ *      F R A M E   S I Z E   E N U M E R A T I O N
+ */
+enum v4l2_frmsizetypes
+{
+        V4L2_FRMSIZE_TYPE_DISCRETE      = 1,
+        V4L2_FRMSIZE_TYPE_CONTINUOUS    = 2,
+        V4L2_FRMSIZE_TYPE_STEPWISE      = 3,
+};
+
+struct v4l2_frmsize_discrete
+{
+        __u32                   width;          /* Frame width [pixel] */
+        __u32                   height;         /* Frame height [pixel] */
+};
+
+struct v4l2_frmsize_stepwise
+{
+        __u32                   min_width;      /* Minimum frame width [pixel] */
+        __u32                   max_width;      /* Maximum frame width [pixel] */
+        __u32                   step_width;     /* Frame width step size [pixel] */
+        __u32                   min_height;     /* Minimum frame height [pixel] */
+        __u32                   max_height;     /* Maximum frame height [pixel] */
+        __u32                   step_height;    /* Frame height step size [pixel] */
+};
+
+struct v4l2_frmsizeenum
+{
+        __u32                   index;          /* Frame size number */
+        __u32                   pixel_format;   /* Pixel format */
+        __u32                   type;           /* Frame size type the device supports. */
+
+        union {                                 /* Frame size */
+                struct v4l2_frmsize_discrete    discrete;
+                struct v4l2_frmsize_stepwise    stepwise;
+        };
+
+        __u32   reserved[2];                    /* Reserved space for future use */
+};
+
+/*
+ *      F R A M E   R A T E   E N U M E R A T I O N
+ */
+enum v4l2_frmivaltypes
+{
+        V4L2_FRMIVAL_TYPE_DISCRETE      = 1,
+        V4L2_FRMIVAL_TYPE_CONTINUOUS    = 2,
+        V4L2_FRMIVAL_TYPE_STEPWISE      = 3,
+};
+
+struct v4l2_frmival_stepwise
+{
+        struct v4l2_fract       min;            /* Minimum frame interval [s] */
+        struct v4l2_fract       max;            /* Maximum frame interval [s] */
+        struct v4l2_fract       step;           /* Frame interval step size [s] */
+};
+
+struct v4l2_frmivalenum
+{
+        __u32                   index;          /* Frame format index */
+        __u32                   pixel_format;   /* Pixel format */
+        __u32                   width;          /* Frame width */
+        __u32                   height;         /* Frame height */
+        __u32                   type;           /* Frame interval type the device supports. */
+
+        union {                                 /* Frame interval */
+                struct v4l2_fract               discrete;
+                struct v4l2_frmival_stepwise    stepwise;
+        };
+
+        __u32   reserved[2];                    /* Reserved space for future use */
+};
+
+/*
  *      T I M E C O D E
  */
 struct v4l2_timecode
@@ -1249,6 +1322,8 @@ struct v4l2_streamparm
 #define VIDIOC_G_EXT_CTRLS      _IOWR ('V', 71, struct v4l2_ext_controls)
 #define VIDIOC_S_EXT_CTRLS      _IOWR ('V', 72, struct v4l2_ext_controls)
 #define VIDIOC_TRY_EXT_CTRLS    _IOWR ('V', 73, struct v4l2_ext_controls)
+#define VIDIOC_ENUM_FRAMESIZES  _IOWR ('V', 74, struct v4l2_frmsizeenum)
+#define VIDIOC_ENUM_FRAMEINTERVALS      _IOWR ('V', 75, struct v4l2_frmivalenum)
 
 #ifdef __OLD_VIDIOC_
 /* for compatibility, will go away some day */