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Hans Verkuil 2151bdc887 [media] v4l2-event: add optional merge and replace callbacks 
When the event queue for a subscribed event is full, then the oldest
event is dropped. It would be nice if the contents of that oldest
event could be merged with the next-oldest. That way no information is
lost, only intermediate steps are lost.

This patch adds optional replace() (called when only one kevent was allocated)
and merge() (called when more than one kevent was allocated) callbacks that
will be called to do this job.

These two callbacks are implemented for the V4L2_EVENT_CTRL event.

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
..
au0828 [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
bt8xx [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
cpia2 [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
cx18 [media] ivtv,cx18: Use default version control for VIDIOC_QUERYCAP 2011-07-27 17:53:14 -03:00
cx88 [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
cx231xx [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
cx23885 [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
cx25840 Fix common misspellings 2011-03-31 11:26:23 -03:00
davinci [media] Stop using linux/version.h on the remaining video drivers 2011-07-27 17:53:16 -03:00
em28xx [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
et61x251 [media] et61x251: Use LINUX_VERSION_CODE for VIDIOC_QUERYCAP 2011-07-27 17:53:15 -03:00
gspca [media] gspca: don't include linux/version.h 2011-07-27 17:53:15 -03:00
hdpvr [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
ivtv [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
m5mols [media] Stop using linux/version.h on the remaining video drivers 2011-07-27 17:53:16 -03:00
marvell-ccic [media] marvell-cam: implement contiguous DMA operation 2011-07-27 17:53:11 -03:00
omap [media] omap_vout: Added check in reqbuf & mmap for buf_size allocation 2011-07-01 15:47:53 -03:00
omap3isp [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
pvrusb2 [media] pvrusb2: Use LINUX_VERSION_CODE for VIDIOC_QUERYCAP 2011-07-27 17:53:15 -03:00
pwc [media] pwc: Use the default version for VIDIOC_QUERYCAP 2011-07-27 17:53:12 -03:00
s5p-fimc [media] Stop using linux/version.h on the remaining video drivers 2011-07-27 17:53:16 -03:00
saa7134 [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
saa7164 [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
sn9c102 [media] sn9c102: Use LINUX_VERSION_CODE for VIDIOC_QUERYCAP 2011-07-27 17:53:15 -03:00
tlg2300 [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
usbvision [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
uvc [media] uvcvideo: Use LINUX_VERSION_CODE for VIDIOC_QUERYCAP 2011-07-27 17:53:15 -03:00
zoran [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
adv7170.c
adv7175.c [media] adv7175: support s_power 2011-01-19 11:45:55 -02:00
adv7180.c
adv7343.c [media] adv7343: use control framework 2011-03-21 20:31:49 -03:00
adv7343_regs.h [media] adv7343: use control framework 2011-03-21 20:31:49 -03:00
ak881x.c
arv.c [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
atmel-isi.c [media] V4L: at91: add Atmel Image Sensor Interface (ISI) support 2011-07-27 17:53:23 -03:00
bt819.c [media] bt819: use control framework 2011-03-21 20:31:49 -03:00
bt856.c
bt866.c
btcx-risc.c
btcx-risc.h
bw-qcam.c [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
c-qcam.c [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
cs53l32a.c
cs5345.c [media] cs5345: use the control framework 2011-03-21 20:31:49 -03:00
cs8420.h
cx2341x.c
fsl-viu.c [media] Stop using linux/version.h on the remaining video drivers 2011-07-27 17:53:16 -03:00
hexium_gemini.c Fix common misspellings 2011-03-31 11:26:23 -03:00
hexium_orion.c
ibmmpeg2.h
imx074.c [media] imx074: return a meaningful error code instead of -1 2011-04-13 09:54:35 -03:00
indycam.c
indycam.h
ir-kbd-i2c.c [media] ir-kbd-i2c: pass device code w/key in hauppauge case 2011-03-22 19:24:18 -03:00
Kconfig [media] V4L: at91: add Atmel Image Sensor Interface (ISI) support 2011-07-27 17:53:23 -03:00
ks0127.c
ks0127.h
m52790.c [media] v4l: make sure drivers supply a zeroed struct v4l2_subdev 2011-04-29 12:33:28 -03:00
Makefile [media] V4L: at91: add Atmel Image Sensor Interface (ISI) support 2011-07-27 17:53:23 -03:00
mem2mem_testdev.c [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
meye.c [media] v4l2-ioctl: add priority handling support 2011-03-22 16:37:59 -03:00
meye.h
msp3400-driver.c [media] msp3400: fill in v4l2_tuner based on vt->type field 2011-07-07 17:28:30 -03:00
msp3400-driver.h
msp3400-kthreads.c Fix common misspellings 2011-03-31 11:26:23 -03:00
mt9m001.c [media] v4l: Rename V4L2_MBUS_FMT_GREY8_1X8 to V4L2_MBUS_FMT_Y8_1X8 2011-03-22 04:53:23 -03:00
mt9m111.c [media] V4L: mt9m111: switch to v4l2-subdev .s_power() method 2011-07-27 17:53:22 -03:00
mt9t031.c
mt9t112.c
mt9v011.c [media] mt9v011: Fixed gain calculation 2011-07-27 17:52:25 -03:00
mt9v022.c [media] V4L: mt9v022: fix pixel clock 2011-05-20 12:07:04 -03:00
mt9v032.c [media] v4l: Add mt9v032 sensor driver 2011-05-20 09:29:49 -03:00
mx1_camera.c [media] Stop using linux/version.h on the remaining video drivers 2011-07-27 17:53:16 -03:00
mx2_camera.c [media] V4L: mx2_camera: .try_fmt shouldn't fail 2011-07-27 17:53:22 -03:00
mx3_camera.c [media] V4L: mx3_camera: remove redundant calculations 2011-07-27 17:53:21 -03:00
mxb.c [media] v4l2-ioctl: add priority handling support 2011-03-22 16:37:59 -03:00
mxb.h
noon010pc30.c [media] Add v4l2 subdev driver for NOON010PC30L image sensor 2011-03-21 20:31:40 -03:00
omap1_camera.c [media] Stop using linux/version.h on the remaining video drivers 2011-07-27 17:53:16 -03:00
omap24xxcam-dma.c
omap24xxcam.c [media] Stop using linux/version.h on the remaining video drivers 2011-07-27 17:53:16 -03:00
omap24xxcam.h
ov772x.c
ov2640.c
ov6650.c Fix common misspellings 2011-03-31 11:26:23 -03:00
ov7670.c [media] marvell-cam: Move cafe-ccic into its own directory 2011-07-27 17:53:00 -03:00
ov9640.c Fix common misspellings 2011-03-31 11:26:23 -03:00
ov9640.h
ov9740.c [media] V4L: ov9740: Add suspend/resume 2011-07-27 17:53:30 -03:00
pms.c [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
pxa_camera.c [media] V4L: pxa-camera: switch to using subdev .s_power() core operation 2011-07-27 17:53:21 -03:00
rj54n1cb0c.c
s2255drv.c [media] Stop using linux/version.h on the remaining video drivers 2011-07-27 17:53:16 -03:00
saa711x_regs.h
saa717x.c
saa6588.c
saa7110.c [media] saa7110: use control framework 2011-03-21 20:31:50 -03:00
saa7115.c [media] v4l2-ctrls: fix and improve volatile control handling 2011-07-27 17:53:17 -03:00
saa7121.h
saa7127.c
saa7146.h
saa7146reg.h
saa7185.c
saa7191.c
saa7191.h
sh_mobile_ceu_camera.c [media] V4L: sh_mobile_ceu_camera: remove redundant calculations 2011-07-27 17:53:22 -03:00
sh_mobile_csi2.c [media] sh_mobile_csi2: fix module reloading 2011-04-13 09:55:38 -03:00
sh_vou.c [media] Stop using linux/version.h on the remaining video drivers 2011-07-27 17:53:16 -03:00
soc_camera.c [media] V4L: soc-camera: remove several now unused soc-camera client operations 2011-07-27 17:53:23 -03:00
soc_camera_platform.c
soc_mediabus.c [media] V4L: soc-camera: add more format look-up entries 2011-05-20 12:05:27 -03:00
sr030pc30.c [media] Correct error code from -ENOMEM to -EINVAL. 2011-07-27 17:52:59 -03:00
stk-sensor.c
stk-webcam.c
stk-webcam.h
tcm825x.c Fix common misspellings 2011-03-31 11:26:23 -03:00
tcm825x.h
tda7432.c [media] Correct and add some parameter descriptions 2011-07-27 17:52:59 -03:00
tda9840.c [media] v4l: make sure drivers supply a zeroed struct v4l2_subdev 2011-04-29 12:33:28 -03:00
tea6415c.c [media] v4l: make sure drivers supply a zeroed struct v4l2_subdev 2011-04-29 12:33:28 -03:00
tea6415c.h
tea6420.c [media] v4l: make sure drivers supply a zeroed struct v4l2_subdev 2011-04-29 12:33:28 -03:00
tea6420.h
ths7303.c
timblogiw.c [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
tlv320aic23b.c [media] tlv320aic23b: use control framework 2011-03-21 20:31:50 -03:00
tuner-core.c [media] xc4000: removed card_type 2011-07-27 17:52:40 -03:00
tvaudio.c Fix common misspellings 2011-03-31 11:26:23 -03:00
tveeprom.c [media] tveeprom: update hauppauge tuner list thru 174 2011-05-20 09:27:15 -03:00
tvp514x.c [media] tvp514x: use the control framework 2011-03-21 20:31:50 -03:00
tvp514x_regs.h
tvp5150.c [media] tvp5150: device detection should be done only once 2011-03-21 20:32:04 -03:00
tvp5150_reg.h
tvp7002.c [media] tvp7002: use control framework 2011-03-21 20:31:50 -03:00
tvp7002_reg.h
tw9910.c [media] V4L: tw9910: remove bogus ENUMINPUT implementation 2011-07-27 17:53:22 -03:00
upd64031a.c [media] v4l: make sure drivers supply a zeroed struct v4l2_subdev 2011-04-29 12:33:28 -03:00
upd64083.c [media] v4l: make sure drivers supply a zeroed struct v4l2_subdev 2011-04-29 12:33:28 -03:00
v4l2-common.c [media] v4l2_prio: move from v4l2-common to v4l2-dev 2011-03-22 16:37:54 -03:00
v4l2-compat-ioctl32.c [media] v4l2-compat-ioctl32: add VIDIOC_DQEVENT support 2011-07-27 17:53:20 -03:00
v4l2-ctrls.c [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.c [media] v4l: Don't access media entity after is has been destroyed 2011-06-30 23:12:36 -03:00
v4l2-device.c [media] v4l2-subdev: implement per-filehandle control handlers 2011-07-27 17:53:17 -03:00
v4l2-event.c [media] v4l2-event: add optional merge and replace callbacks 2011-07-27 17:53:31 -03:00
v4l2-fh.c [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.c
v4l2-ioctl.c [media] v4l2-ctrls: add v4l2_fh pointer to the set control functions 2011-07-27 17:53:19 -03:00
v4l2-mem2mem.c [media] Update Pawel Osciak's e-mail address 2011-03-22 04:55:05 -03:00
v4l2-subdev.c [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
via-camera.c [media] via-camera: add MODULE_ALIAS 2011-05-20 09:30:49 -03:00
via-camera.h
videobuf-core.c
videobuf-dma-contig.c Revert "[media] V4L: videobuf, don't use dma addr as physical" 2011-04-19 10:54:44 -07:00
videobuf-dma-sg.c [media] videobuf_pages_to_sg: sglist[0] length problem 2011-07-27 17:52:19 -03:00
videobuf-dvb.c
videobuf-vmalloc.c
videobuf2-core.c [media] media: vb2: fix allocation failure check 2011-06-30 22:33:47 -03:00
videobuf2-dma-contig.c [media] videobuf2: fix an error message 2011-04-13 09:52:36 -03:00
videobuf2-dma-sg.c [media] media: Convert vmalloc/memset to vzalloc 2011-07-27 17:52:21 -03:00
videobuf2-memops.c [media] V4L/videobuf2-memops: use pr_debug for debug messages 2011-07-27 17:52:23 -03:00
videobuf2-vmalloc.c [media] Update Pawel Osciak's e-mail address 2011-03-22 04:55:05 -03:00
vino.c [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
vino.h
vivi.c [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
vp27smpx.c
vpx3220.c Fix common misspellings 2011-03-31 11:26:23 -03:00
w9966.c [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00
wm8739.c
wm8775.c [media] Add proper audio support for Nova-S Plus with wm8775 ADC 2011-03-21 20:32:19 -03:00
zr364xx.c [media] Stop using linux/version.h on most video drivers 2011-07-27 17:53:12 -03:00