Lines Matching full:overlay

6 Video Overlay Interface
9 **Also known as Framebuffer Overlay or Previewing.**
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.
71 Before overlay can commence applications must program the driver with
84 Some devices add the video overlay to the output signal of the graphics
111 When simultaneous capturing and overlay is supported and the hardware
114 (:ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>`) or overlay
119 Overlay Window
122 The overlaid image is determined by cropping and overlay window
128 The overlay window is described by a struct
138 To program the overlay window applications set the ``type`` field of a
146 :ref:`VIDIOC_S_FMT <VIDIOC_G_FMT>` this also works after the overlay has been enabled.
152 When simultaneous capturing and overlay is supported and the hardware
154 takes precedence. The attempt to capture or overlay as well
295 Enabling Overlay
298 To start or stop the frame buffer overlay applications call the
303    the efforts to support simultaneous capturing and overlay will