| .. SPDX-License-Identifier: GPL-2.0 |
| |
| .. include:: <isonum.txt> |
| |
| Vaio Picturebook Motion Eye Camera Driver |
| ========================================= |
| |
| Copyright |copy| 2001-2004 Stelian Pop <stelian@popies.net> |
| |
| Copyright |copy| 2001-2002 Alcรดve <www.alcove.com> |
| |
| Copyright |copy| 2000 Andrew Tridgell <tridge@samba.org> |
| |
| 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. |
