include/uapi/linux/npcm-video.h

   1 /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
   2 /*
   3  * Controls header for NPCM video driver
   4  *
   5  * Copyright (C) 2022 Nuvoton Technologies
   6  */
   7
   8 #ifndef _UAPI_LINUX_NPCM_VIDEO_H
   9 #define _UAPI_LINUX_NPCM_VIDEO_H
  10
  11 #include <linux/v4l2-controls.h>
  12
  13 /*
  14  * Check Documentation/userspace-api/media/drivers/npcm-video.rst for control
  15  * details.
  16  */
  17
  18 /*
  19  * This control is meant to set the mode of NPCM Video Capture/Differentiation
  20  * (VCD) engine.
  21  *
  22  * The VCD engine supports two modes:
  23  * COMPLETE - Capture the next complete frame into memory.
  24  * DIFF     - Compare the incoming frame with the frame stored in memory, and
  25  *            updates the differentiated frame in memory.
  26  */
  27 #define V4L2_CID_NPCM_CAPTURE_MODE      (V4L2_CID_USER_NPCM_BASE + 0)
  28
  29 enum v4l2_npcm_capture_mode {
  30         V4L2_NPCM_CAPTURE_MODE_COMPLETE = 0, /* COMPLETE mode */
  31         V4L2_NPCM_CAPTURE_MODE_DIFF     = 1, /* DIFF mode */
  32 };
  33
  34 /*
  35  * This control is meant to get the count of compressed HEXTILE rectangles which
  36  * is relevant to the number of differentiated frames if VCD is in DIFF mode.
  37  * And the count will always be 1 if VCD is in COMPLETE mode.
  38  */
  39 #define V4L2_CID_NPCM_RECT_COUNT        (V4L2_CID_USER_NPCM_BASE + 1)
  40
  41 #endif /* _UAPI_LINUX_NPCM_VIDEO_H */