Lines Matching refs:overlay
11 Video overlay devices have the ability to genlock (TV-)video into the
19 Video overlay devices are accessed through the same character special
25 capturing. The overlay function is only available after calling
28 The driver may support simultaneous overlay and capturing using the
31 directed away from overlay to capture, or one field may be used for
32 overlay and the other for capture if the capture parameters permit this.
35 overlay. This must be supported by all drivers capable of simultaneous
36 capturing and overlay. Optionally these drivers may also permit
37 capturing and overlay with a single file descriptor for compatibility
42 While the X server controls video overlay, the application can take
48 Devices supporting the video overlay interface set the
51 :ref:`VIDIOC_QUERYCAP` ioctl. The overlay I/O
59 Video overlay devices shall support :ref:`audio input <audio>`,
64 ioctls must be supported by all video overlay devices.
70 Before overlay can commence applications must program the driver with
83 Some devices add the video overlay to the output signal of the graphics
108 When simultaneous capturing and overlay is supported and the hardware
111 (:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`) or overlay
119 The overlaid image is determined by cropping and overlay window
125 The overlay window is described by a struct
135 To program the overlay window applications set the ``type`` field of a
143 :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` this also works after the overlay has been enabled.
149 When simultaneous capturing and overlay is supported and the hardware
151 takes precedence. The attempt to capture or overlay as well
292 To start or stop the frame buffer overlay applications call the
297 the efforts to support simultaneous capturing and overlay will