mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
53 lines
1.9 KiB
53 lines
1.9 KiB
.. SPDX-License-Identifier: GPL-2.0 |
|
|
|
.. include:: <isonum.txt> |
|
|
|
Vaio Picturebook Motion Eye Camera Driver |
|
========================================= |
|
|
|
Copyright |copy| 2001-2004 Stelian Pop <[email protected]> |
|
|
|
Copyright |copy| 2001-2002 Alcôve <www.alcove.com> |
|
|
|
Copyright |copy| 2000 Andrew Tridgell <[email protected]> |
|
|
|
Private API |
|
----------- |
|
|
|
The driver supports frame grabbing with the video4linux API, |
|
so all video4linux tools (like xawtv) should work with this driver. |
|
|
|
Besides the video4linux interface, the driver has a private interface |
|
for accessing the Motion Eye extended parameters (camera sharpness, |
|
agc, video framerate), the snapshot and the MJPEG capture facilities. |
|
|
|
This interface consists of several ioctls (prototypes and structures |
|
can be found in include/linux/meye.h): |
|
|
|
MEYEIOC_G_PARAMS and MEYEIOC_S_PARAMS |
|
Get and set the extended parameters of the motion eye camera. |
|
The user should always query the current parameters with |
|
MEYEIOC_G_PARAMS, change what he likes and then issue the |
|
MEYEIOC_S_PARAMS call (checking for -EINVAL). The extended |
|
parameters are described by the meye_params structure. |
|
|
|
|
|
MEYEIOC_QBUF_CAPT |
|
Queue a buffer for capture (the buffers must have been |
|
obtained with a VIDIOCGMBUF call and mmap'ed by the |
|
application). The argument to MEYEIOC_QBUF_CAPT is the |
|
buffer number to queue (or -1 to end capture). The first |
|
call to MEYEIOC_QBUF_CAPT starts the streaming capture. |
|
|
|
MEYEIOC_SYNC |
|
Takes as an argument the buffer number you want to sync. |
|
This ioctl blocks until the buffer is filled and ready |
|
for the application to use. It returns the buffer size. |
|
|
|
MEYEIOC_STILLCAPT and MEYEIOC_STILLJCAPT |
|
Takes a snapshot in an uncompressed or compressed jpeg format. |
|
This ioctl blocks until the snapshot is done and returns (for |
|
jpeg snapshot) the size of the image. The image data is |
|
available from the first mmap'ed buffer. |
|
|
|
Look at the 'motioneye' application code for an actual example.
|
|
|