cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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meye-uapi.rst (1946B)

      1.. SPDX-License-Identifier: GPL-2.0
      2
      3.. include:: <isonum.txt>
      4
      5Vaio Picturebook Motion Eye Camera Driver
      6=========================================
      7
      8Copyright |copy| 2001-2004 Stelian Pop <stelian@popies.net>
      9
     10Copyright |copy| 2001-2002 Alcôve <www.alcove.com>
     11
     12Copyright |copy| 2000 Andrew Tridgell <tridge@samba.org>
     13
     14Private API
     15-----------
     16
     17The driver supports frame grabbing with the video4linux API,
     18so all video4linux tools (like xawtv) should work with this driver.
     19
     20Besides the video4linux interface, the driver has a private interface
     21for accessing the Motion Eye extended parameters (camera sharpness,
     22agc, video framerate), the snapshot and the MJPEG capture facilities.
     23
     24This interface consists of several ioctls (prototypes and structures
     25can be found in include/linux/meye.h):
     26
     27MEYEIOC_G_PARAMS and MEYEIOC_S_PARAMS
     28	Get and set the extended parameters of the motion eye camera.
     29	The user should always query the current parameters with
     30	MEYEIOC_G_PARAMS, change what he likes and then issue the
     31	MEYEIOC_S_PARAMS call (checking for -EINVAL). The extended
     32	parameters are described by the meye_params structure.
     33
     34
     35MEYEIOC_QBUF_CAPT
     36	Queue a buffer for capture (the buffers must have been
     37	obtained with a VIDIOCGMBUF call and mmap'ed by the
     38	application). The argument to MEYEIOC_QBUF_CAPT is the
     39	buffer number to queue (or -1 to end capture). The first
     40	call to MEYEIOC_QBUF_CAPT starts the streaming capture.
     41
     42MEYEIOC_SYNC
     43	Takes as an argument the buffer number you want to sync.
     44	This ioctl blocks until the buffer is filled and ready
     45	for the application to use. It returns the buffer size.
     46
     47MEYEIOC_STILLCAPT and MEYEIOC_STILLJCAPT
     48	Takes a snapshot in an uncompressed or compressed jpeg format.
     49	This ioctl blocks until the snapshot is done and returns (for
     50	jpeg snapshot) the size of the image. The image data is
     51	available from the first mmap'ed buffer.
     52
     53Look at the 'motioneye' application code for an actual example.