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linux/include/media
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Hans Verkuil f1e393de38 [media] v4l2-event/ctrls/fh: allocate events per fh and per type instead of just per-fh 
The driver had to decide how many events to allocate when the v4l2_fh struct
was created. It was possible to add more events afterwards, but there was no
way to ensure that you wouldn't miss important events if the event queue
would fill up for that filehandle.

In addition, once there were no more free events, any new events were simply
dropped on the floor.

For the control event in particular this made life very difficult since
control status/value changes could just be missed if the number of allocated
events and the speed at which the application read events was too low to keep
up with the number of generated events. The application would have no idea
what the latest state was for a control since it could have missed the latest
control change.

So this patch makes some major changes in how events are allocated. Instead
of allocating events per-filehandle they are now allocated when subscribing an
event. So for that particular event type N events (determined by the driver)
are allocated. Those events are reserved for that particular event type.
This ensures that you will not miss events for a particular type altogether.

In addition, if there are N events in use and a new event is raised, then
the oldest event is dropped and the new one is added. So the latest event
is always available.

This can be further improved by adding the ability to merge the state of
two events together, ensuring that no data is lost at all. This will be
added in the next patch.

This also makes it possible to allow the user to determine the number of
events that will be allocated. This is not implemented at the moment, but
would be trivial.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2011-07-27 17:53:31 -03:00
..
davinci [media] davinci vpbe: VENC( Video Encoder) implementation 2011-07-27 17:53:10 -03:00
adv7343.h V4L/DVB (11743): Analog Devices ADV7343 video encoder driver 2009-06-16 18:20:59 -03:00
ak881x.h V4L/DVB: V4L: v4l2-subdev driver for AK8813 and AK8814 TV-encoders from AKM 2010-05-19 12:58:02 -03:00
atmel-isi.h [media] V4L: at91: add Atmel Image Sensor Interface (ISI) support 2011-07-27 17:53:23 -03:00
bt819.h [media] bt819: the ioctls in the header are internal to the kernel 2010-12-29 08:17:19 -02:00
cs53l32a.h
cs5345.h
cx2341x.h [media] v4l2-ctrls: use const char * const * for the menu arrays 2010-12-30 08:02:14 -02:00
cx25840.h V4L/DVB: cx25840/ivtv: replace ugly priv control with s_config 2010-08-08 23:43:05 -03:00
i2c-addr.h V4L/DVB (9940): bt832: remove this driver 2008-12-30 09:39:25 -02:00
ir-kbd-i2c.h [media] rc: Rename remote controller type to rc_type instead of ir_type 2010-12-29 08:16:50 -02:00
lirc.h Fix common misspellings 2011-03-31 11:26:23 -03:00
lirc_dev.h [media] lirc_dev: store cdev in irctl, up maxdevs 2011-06-11 09:03:20 -03:00
m5mols.h [media] m5mols: Use proper email address format 2011-06-11 09:46:00 -03:00
m52790.h
media-device.h [media] media: Links setup 2011-03-22 04:53:16 -03:00
media-devnode.h [media] media: Media device node support 2011-03-22 04:52:22 -03:00
media-entity.h [media] media: Pipelines and media streams 2011-03-22 04:53:17 -03:00
mmp-camera.h [media] marvell-cam: Basic working MMP camera driver 2011-07-27 17:53:01 -03:00
msp3400.h V4L/DVB (11380): v4l2-subdev: change s_routing prototype 2009-04-06 21:44:27 -03:00
mt9t112.h V4L/DVB (13670): soc-camera: Add mt9t112 camera driver 2009-12-16 09:27:41 -02:00
mt9v011.h [media] v4l2-subdev: remove core.s_config and v4l2_i2c_new_subdev_cfg() 2011-01-19 11:45:30 -02:00
mt9v032.h [media] v4l: Add mt9v032 sensor driver 2011-05-20 09:29:49 -03:00
noon010pc30.h [media] Add v4l2 subdev driver for NOON010PC30L image sensor 2011-03-21 20:31:40 -03:00
omap1_camera.h [media] SoC Camera: add driver for OMAP1 camera interface 2010-10-21 07:55:37 -02:00
ov772x.h soc-camera: ov772x: Modify buswidth control 2010-02-26 15:11:00 -03:00
ov7670.h [media] marvell-cam: Move cafe-ccic into its own directory 2011-07-27 17:53:00 -03:00
pwc-ioctl.h v4l-dvb: remove legacy checks to allow support for kernels < 2.6.10 2008-07-20 07:17:52 -03:00
radio-si4713.h V4L/DVB (12551): FM TX: si4713: Add files to add radio interface for si4713 2009-09-12 12:19:19 -03:00
rc-core.h [media] rc-core: lirc use unsigned int 2011-07-27 17:52:59 -03:00
rc-map.h [media] rc: add tivo/nero liquidtv keymap 2011-05-20 09:27:29 -03:00
rj54n1cb0c.h V4L/DVB (13661): rj54n1cb0c: Add cropping, auto white balance, restrict sizes, add platform data 2009-12-16 09:27:30 -02:00
s5p_fimc.h [media] s5p-fimc: Add a platform data entry for MIPI-CSI data alignment 2011-03-22 04:54:18 -03:00
saa6588.h [media] saa6588: rename rds.h to saa6588.h 2010-12-29 08:17:18 -02:00
saa6752hs.h
saa7115.h V4L/DVB (8940): saa7115: fix saa7111(a) support 2008-10-12 09:37:00 -02:00
saa7127.h
saa7146.h [media] saa7146: Convert from .ioctl to .unlocked_ioctl 2011-01-19 11:28:10 -02:00
saa7146_vv.h V4L/DVB: saa7146: fix regression of the av7110/budget-av driver 2010-05-06 19:20:50 -03:00
sh_mobile_ceu.h V4L/DVB: V4L2: sh_mobile_camera_ceu: add support for CSI2 2010-08-02 16:43:40 -03:00
sh_mobile_csi2.h V4L/DVB: V4L2: soc-camera: add a MIPI CSI-2 driver for SH-Mobile platforms 2010-08-02 16:43:39 -03:00
sh_vou.h [media] sh_vou: Don't use module names to load I2C modules 2010-10-22 21:53:33 -02:00
si4713.h [media] radio-si4713: Add regulator framework support 2010-12-29 08:16:35 -02:00
soc_camera.h [media] V4L: soc-camera: remove several now unused soc-camera client operations 2011-07-27 17:53:23 -03:00
soc_camera_platform.h [media] V4L: soc_camera_platform: add helper functions to manage device instances 2011-05-20 07:26:14 -03:00
soc_mediabus.h [media] V4L: soc-camera: add a new packing for YUV 4:2:0 type formats 2011-05-20 12:05:08 -03:00
sr030pc30.h [media] Add driver for Siliconfile SR030PC30 VGA camera 2010-10-21 07:55:49 -02:00
timb_radio.h [media] radio-timb: Simplified platform data 2011-07-27 17:53:07 -03:00
timb_video.h [media] media: Add timberdale video-in driver 2010-12-29 08:16:46 -02:00
tuner-types.h
tuner.h [media] dib0700: add initial code for PCTV 340e by Davide Ferri 2011-07-27 17:52:25 -03:00
tvaudio.h V4L/DVB (11376): tvaudio.h: add static inline to retrieve the list of possible i2c addrs. 2009-04-06 21:44:25 -03:00
tveeprom.h V4L/DVB (8479): tveeprom/ivtv: fix usage of has_ir field 2008-07-26 12:54:42 -03:00
tvp514x.h V4L/DVB (12246): tvp514x: Migration to sub-device framework 2009-09-19 00:18:09 -03:00
tvp5150.h
tvp7002.h V4L/DVB: Definitions for TVP7002 in DM365 2010-02-26 15:11:01 -03:00
tw9910.h tw9910: use TABs for indentation 2010-02-26 15:10:59 -03:00
upd64031a.h
upd64083.h
v4l2-chip-ident.h [media] marvell-cam: Basic working MMP camera driver 2011-07-27 17:53:01 -03:00
v4l2-common.h [media] v4l2_prio: move from v4l2-common to v4l2-dev 2011-03-22 16:37:54 -03:00
v4l2-ctrls.h [media] v4l2-event/ctrls/fh: allocate events per fh and per type instead of just per-fh 2011-07-27 17:53:31 -03:00
v4l2-dev.h [media] v4l: Fix media_entity_to_video_device macro argument name 2011-06-01 09:42:03 -03:00
v4l2-device.h [media] v4l2-device: fix a macro definition 2011-04-13 09:53:29 -03:00
v4l2-event.h [media] v4l2-event/ctrls/fh: allocate events per fh and per type instead of just per-fh 2011-07-27 17:53:31 -03:00
v4l2-fh.h [media] v4l2-event/ctrls/fh: allocate events per fh and per type instead of just per-fh 2011-07-27 17:53:31 -03:00
v4l2-int-device.h V4L/DVB (10141): v4l2: debugging API changed to match against driver name instead of ID. 2009-01-02 17:11:52 -02:00
v4l2-ioctl.h [media] v4l2-ioctl: add priority handling support 2011-03-22 16:37:59 -03:00
v4l2-mediabus.h [media] v4l: Move the media/v4l2-mediabus.h header to include/linux 2011-03-22 04:53:21 -03:00
v4l2-mem2mem.h [media] Update Pawel Osciak's e-mail address 2011-03-22 04:55:05 -03:00
v4l2-subdev.h [media] v4l2-event/ctrls/fh: allocate events per fh and per type instead of just per-fh 2011-07-27 17:53:31 -03:00
videobuf-core.h [media] V4L: remove V4L1 compatibility mode 2010-12-29 08:17:07 -02:00
videobuf-dma-contig.h V4L/DVB: videobuf: add ext_lock argument to the queue init functions 2010-10-21 01:06:14 -02:00
videobuf-dma-sg.h V4L/DVB: videobuf: add ext_lock argument to the queue init functions 2010-10-21 01:06:14 -02:00
videobuf-dvb.h [media] Add missing include guard to header file 2011-05-25 21:42:30 -03:00
videobuf-vmalloc.h V4L/DVB: videobuf: add ext_lock argument to the queue init functions 2010-10-21 01:06:14 -02:00
videobuf2-core.h [media] Update Pawel Osciak's e-mail address 2011-03-22 04:55:05 -03:00
videobuf2-dma-contig.h [media] videobuf2-dma-contig: make cookie() return a pointer to dma_addr_t 2011-03-22 19:41:58 -03:00
videobuf2-dma-sg.h [media] v4l: videobuf2: add DMA scatter/gather allocator 2011-03-21 20:31:34 -03:00
videobuf2-memops.h [media] Update Pawel Osciak's e-mail address 2011-03-22 04:55:05 -03:00
videobuf2-vmalloc.h [media] Update Pawel Osciak's e-mail address 2011-03-22 04:55:05 -03:00
wm8775.h [media] Add proper audio support for Nova-S Plus with wm8775 ADC 2011-03-21 20:32:19 -03:00