--- zzzz-none-000/linux-2.4.17/Documentation/video4linux/meye.txt 2001-10-11 16:04:57.000000000 +0000 +++ sangam-fb-322/linux-2.4.17/Documentation/video4linux/meye.txt 2004-11-24 13:22:19.000000000 +0000 @@ -1,105 +1,105 @@ -Vaio Picturebook Motion Eye Camera Driver Readme ------------------------------------------------- - Copyright (C) 2001 Stelian Pop , Alcôve - Copyright (C) 2000 Andrew Tridgell - -This driver enable the use of video4linux compatible applications with the -Motion Eye camera. This driver requires the "Sony Vaio Programmable I/O -Control Device" driver (which can be found in the "Character drivers" -section of the kernel configuration utility) to be compiled and installed -(using its "camera=1" parameter). - -It can do at maximum 30 fps @ 320x240 or 15 fps @ 640x480. - -Grabbing is supported in packed YUV colorspace only. - -MJPEG hardware grabbing is supported via a private API (see below). - -Module options: ---------------- - - gbuffers: number of capture buffers, default is 2 (32 max) - - gbufsize: size of each capture buffer, default is 614400 - - video_nr: video device to register (0 = /dev/video0, etc) - -Module use: ------------ - -In order to automatically load the meye module on use, you can put those lines -in your /etc/modules.conf file: - - alias char-major-81 videodev - alias char-major-81-0 meye - options meye gbuffers=32 - -Usage: ------- - - xawtv >= 3.49 () - for display and uncompressed video capture: - - xawtv -c /dev/video0 -geometry 640x480 - or - xawtv -c /dev/video0 -geometry 320x240 - - motioneye () - for getting ppm or jpg snapshots, mjpeg video - -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 shapshot 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 - 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 untils the buffer is filled and ready - for the application to use. It returns the buffer size. - - MEYEIOC_STILLCAPT - 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. - -Bugs / Todo: ------------- - - - overlay output is not supported (although the camera is capable of). - (it should not be too hard to to it, provided we found how...) - - - mjpeg hardware playback doesn't work (depends on overlay...) - - - rewrite the driver to use some commun video4linux API for snapshot - and mjpeg capture. Unfortunately, video4linux1 does not permit it, - the BUZ API seems to be targeted to TV cards only. The video4linux 2 - API may be an option, if it goes into the kernel (maybe 2.5 - material ?). +Vaio Picturebook Motion Eye Camera Driver Readme +------------------------------------------------ + Copyright (C) 2001 Stelian Pop , Alcôve + Copyright (C) 2000 Andrew Tridgell + +This driver enable the use of video4linux compatible applications with the +Motion Eye camera. This driver requires the "Sony Vaio Programmable I/O +Control Device" driver (which can be found in the "Character drivers" +section of the kernel configuration utility) to be compiled and installed +(using its "camera=1" parameter). + +It can do at maximum 30 fps @ 320x240 or 15 fps @ 640x480. + +Grabbing is supported in packed YUV colorspace only. + +MJPEG hardware grabbing is supported via a private API (see below). + +Module options: +--------------- + + gbuffers: number of capture buffers, default is 2 (32 max) + + gbufsize: size of each capture buffer, default is 614400 + + video_nr: video device to register (0 = /dev/video0, etc) + +Module use: +----------- + +In order to automatically load the meye module on use, you can put those lines +in your /etc/modules.conf file: + + alias char-major-81 videodev + alias char-major-81-0 meye + options meye gbuffers=32 + +Usage: +------ + + xawtv >= 3.49 () + for display and uncompressed video capture: + + xawtv -c /dev/video0 -geometry 640x480 + or + xawtv -c /dev/video0 -geometry 320x240 + + motioneye () + for getting ppm or jpg snapshots, mjpeg video + +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 shapshot 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 + 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 untils the buffer is filled and ready + for the application to use. It returns the buffer size. + + MEYEIOC_STILLCAPT + 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. + +Bugs / Todo: +------------ + + - overlay output is not supported (although the camera is capable of). + (it should not be too hard to to it, provided we found how...) + + - mjpeg hardware playback doesn't work (depends on overlay...) + + - rewrite the driver to use some commun video4linux API for snapshot + and mjpeg capture. Unfortunately, video4linux1 does not permit it, + the BUZ API seems to be targeted to TV cards only. The video4linux 2 + API may be an option, if it goes into the kernel (maybe 2.5 + material ?).