Всякое знание про камеры на малине

TODO ПРОЧИТАЙ

https://www.marcusfolkesson.se/blog/v4l2-and-media-controller/
https://kakaroto.homelinux.net/2012/09/uvc-h264-encoding-cameras-support-in-gstreamer/

Аппаратчики

У всех малин CS2 2lane, вроде как это 720p60 || 1080p30 макс
- pi5 и cm4 имеют все 4, можно 2x больше фпс
Енкодер h264 макс 720p60, 1080p30
TODO Енкодер jpeg аппаратный макс ?
Pi0/Pi0W == Pi1/2?
Pi0 2 == Pi3
pi4 умеет в hevc аппаратно туда-сюда

Софтня

Есть старый MMAL проприетарный, для 64бита косячный/недоделанный, не используй
Есть новый V4L2 стандартный, в него вынесено почти всё, что умел ммал (но вроде не всё?)
Есть libcamera, оборачивающий всё это в какой-то якобы более удобный интерфейс, НО:
- Кресты, очень медленно собирается на Pi0 2.
- Делает всякое софтом: jpeg, коррекцию изображений (автояркость, белизна -- не нужно, можно вырубить)
- Примеры из libcamera-apps абсолюно долбанутые на всю голову крестами, кто так пишет эмбедед

Разное

Дока подробная по кишкам софта и камер: https://datasheets.raspberrypi.com/camera/raspberry-pi-camera-guide.pdf
https://www.raspberrypi.com/documentation/computers/camera_software.html
Статус разных подсистем (на 2021, ещё релевантно; есть ссылки дальше) https://forums.raspberrypi.com/viewtopic.php?t=317511

v4l2

Можно даже дружить с OpenGL через DMABUF
- TBD пример (есть)
Рассыпает функциональность на пачку /dev/video* устройств
- например, /dev/video0 это вход камеры
- /dev/video1 какие-то метаданные
- /dev/video10-12,... декодинг h264, енкодинг h264, процессинг/ISP блоки, ... jpeg, ... Кормится рассыпуха тупо прокидыванием dmabuf fd друг в друга.

Доки

https://www.linuxtv.org/downloads/v4l-dvb-apis-new/userspace-api/v4l/ext-ctrls-image-source.html https://www.linuxtv.org/downloads/v4l-dvb-apis-new/userspace-api/v4l/control.html https://www.linuxtv.org/downloads/v4l-dvb-apis-new/userspace-api/v4l/vidioc-subdev-g-selection.html https://www.kernel.org/doc/html/latest/userspace-api/media/v4l/vidioc-expbuf.html https://www.kernel.org/doc/html/latest/userspace-api/media/v4l/dev-mem2mem.html https://www.kernel.org/doc/html/latest/userspace-api/media/v4l/dmabuf.html https://www.kernel.org/doc/html/v5.11/userspace-api/media/drivers/uvcvideo.html

stateful (h264), держит стейт, просто кормить: https://www.kernel.org/doc/html/latest/userspace-api/media/v4l/dev-decoder.html
stateless (h265, >=pi4), сложно кормить (use ffmpeg): https://www.kernel.org/doc/html/latest/userspace-api/media/v4l/dev-stateless-decoder.html

Примеры

h264: https://github.com/raspberrypi/libcamera-apps/blob/main/encoder/h264_encoder.cpp
v4l2 isp: https://forums.raspberrypi.com/viewtopic.php?t=352876
dmabuf в gl: https://forums.raspberrypi.com/viewtopic.php?t=281296
https://github.com/FFmpeg/FFmpeg/blob/master/libavcodec/v4l2_context.c#L132
https://github.com/FFmpeg/FFmpeg/blob/master/libavcodec/v4l2_buffers.c#L512
https://github.com/FFmpeg/FFmpeg/blob/master/libavcodec/v4l2_context.c#L391
https://github.com/GStreamer/gst-plugins-good/blob/master/sys/v4l2/gstv4l2object.c
dmabuf into gl:
- https://github.com/monolith-jspark/rpi_v4l2dma_opengl_test/
https://github.com/ArduCAM/MIPI_Camera/blob/master/RPI/raw_callback.c
https://github.com/raspberrypi/linux/blob/rpi-4.19.y/drivers/staging/vc04_services/bcm2835-codec/bcm2835-v4l2-codec.c
https://github.com/raspberrypi/linux/blob/rpi-5.10.y/drivers/staging/vc04_services/bcm2835-isp/bcm2835-v4l2-isp.c
эффективное декодирование ffmpeg в kms: https://github.com/jc-kynesim/hello_drmprime

Showmewebcam OS

Давно не обновлялась, старая, на старых ядрах.
Старый форк uvc-gadget
Но вроде как всё равно уже на v4l2. Не на libcamera во всяком случае.
cameractl в её составе может в фиксированный руками баланс белого и iso. Можно выставить в нормальный.
Не может в 720p60, т.к. в скриптах и в uvc-gadget забито гвоздями макс 30фпс. Поменять трудно, т.к. squashfs readonly.
- только пересобирать всё?
Нет сети, только ttyUSB, ничего нельзя просто поменять.
UVC OTG устройство настраивается шелл-скриптом

Raspberry Pi OS

Сейчас самый свежий bookworm
Можно руками повторить примерно то же, что и showmewebcam, но:
- uvc-gadget старый не работает, новый не работает через v4l2 напрямую, только через libcamera
- libcamera пакует mjpeg софтом, что в 60фпс упирается в 100% проц
- почему-то постоянно сыпятся ошибки uvc на хосте, видео дёргается на всём, кроме явного mjpeg
- mjpeg выглядит гладко, но зелено (?!)
- по сети всё стабильно с h264 720p60, но общая задержка > 500мс.

Примеры

RTSP libcamera-apps: https://forums.raspberrypi.com/viewtopic.php?t=354028

ustreamer

https://github.com/pikvm/ustreamer/tree/master Вроде как:

использует v4l2
аппаратно жмёт jpeg

uvc-gadget

old+working+showmewebcam: https://github.com/peterbay/uvc-gadget new+libcamera-meh: https://gitlab.freedesktop.org/camera/uvc-gadget/

cameractl

Крутилки и их значения

https://github.com/ayufan/camera-streamer

Как это https://github.com/ayufan/camera-streamer/blob/main/docs/v4l2-isp-mode.md

https://github.com/kinweilee/v4l2-mmal-uvc

План работ

Попробуй руками потрогать за v4l2?
Попробуй к libcamera прикрутить аппаратный mjpeg?
Протрейсь usb-otg, почему там ошибки

ETC

https://qengineering.eu/protect-the-raspberry-pi-4-sd-flashcard.html
DMABUF export, kernel patching, etc: https://forums.raspberrypi.com/viewtopic.php?t=291940
Yet another V4L2 to OpenGL via DMABUF thread: https://forums.raspberrypi.com/viewtopic.php?f=68&t=281296&hilit=yavta

UVC and controls

UVC controls being read

[INF] UVC_EVENT_SETUP: bRequestType=>CI(a1) bRequest=UVC_GET_INFO(86) wIndex=[ent=2 if=0](0200) wValue=0200 wLength=1
[INF] processEventSetup: interface=UVC_INTF_VIDEO_CONTROL(0) entity=UVC_VC_ENT_PROCESSING_UNIT_ID(2) control=UVC_PU_BRIGHTNESS_CONTROL(2)
[ERR] processEventSetup: interface=UVC_INTF_VIDEO_CONTROL(0) entity=UVC_VC_ENT_PROCESSING_UNIT_ID(2) control=UVC_PU_BRIGHTNESS_CONTROL(2) not found
[INF] UVC_EVENT_SETUP: bRequestType=>CI(a1) bRequest=UVC_GET_CUR(81) wIndex=[ent=0 if=0](0000) wValue=0200 wLength=1
[INF] processEventSetup: interface=UVC_INTF_VIDEO_CONTROL(0) entity=UVC_VC_ENT_INTERFACE(0) control=UVC_VC_REQUEST_ERROR_CODE_CONTROL(2)
[INF] UVC_EVENT_SETUP: bRequestType=>CI(a1) bRequest=UVC_GET_INFO(86) wIndex=[ent=1 if=0](0100) wValue=0200 wLength=1
[INF] processEventSetup: interface=UVC_INTF_VIDEO_CONTROL(0) entity=UVC_VC_ENT_CAMERA_TERMINAL_ID(1) control=UVC_CT_AE_MODE_CONTROL(2)
[ERR] processEventSetup: interface=UVC_INTF_VIDEO_CONTROL(0) entity=UVC_VC_ENT_CAMERA_TERMINAL_ID(1) control=UVC_CT_AE_MODE_CONTROL(2) not found
[INF] UVC_EVENT_SETUP: bRequestType=>CI(a1) bRequest=UVC_GET_CUR(81) wIndex=[ent=0 if=0](0000) wValue=0200 wLength=1
[INF] processEventSetup: interface=UVC_INTF_VIDEO_CONTROL(0) entity=UVC_VC_ENT_INTERFACE(0) control=UVC_VC_REQUEST_ERROR_CODE_CONTROL(2)
[INF] UVC_EVENT_SETUP: bRequestType=>CI(a1) bRequest=UVC_GET_DEF(87) wIndex=[ent=0 if=1](0001) wValue=0100 wLength=34
[INF] processEventSetup: interface=UVC_INTF_VIDEO_STREAMING(1) entity=UVC_VS_ENT_INTERFACE(0) control=UVC_VS_PROBE_CONTROL(1)
[INF] UVC_EVENT_SETUP: bRequestType=<CI(21) bRequest=UVC_SET_CUR(01) wIndex=[ent=0 if=1](0001) wValue=0100 wLength=34
[INF] processEventSetup: interface=UVC_INTF_VIDEO_STREAMING(1) entity=UVC_VS_ENT_INTERFACE(0) control=UVC_VS_PROBE_CONTROL(1)
[ERR] uvcHandleVsInterfaceProbeCommitControl: UVC_SET_CUR not implemented (cs=1)
[INF] uvc_gadget: UVC_EVENT_DATA length=34
[ERR] processEventData: not implemented (length=34), control_selector=1
[INF] UVC_EVENT_SETUP: bRequestType=>CI(a1) bRequest=UVC_GET_CUR(81) wIndex=[ent=0 if=1](0001) wValue=0100 wLength=34
[INF] processEventSetup: interface=UVC_INTF_VIDEO_STREAMING(1) entity=UVC_VS_ENT_INTERFACE(0) control=UVC_VS_PROBE_CONTROL(1)
[INF] UVC_EVENT_SETUP: bRequestType=>CI(a1) bRequest=UVC_GET_DEF(87) wIndex=[ent=2 if=0](0200) wValue=0200 wLength=2
[INF] processEventSetup: interface=UVC_INTF_VIDEO_CONTROL(0) entity=UVC_VC_ENT_PROCESSING_UNIT_ID(2) control=UVC_PU_BRIGHTNESS_CONTROL(2)
[ERR] processEventSetup: interface=UVC_INTF_VIDEO_CONTROL(0) entity=UVC_VC_ENT_PROCESSING_UNIT_ID(2) control=UVC_PU_BRIGHTNESS_CONTROL(2) not found
[INF] UVC_EVENT_SETUP: bRequestType=>CI(a1) bRequest=UVC_GET_CUR(81) wIndex=[ent=0 if=0](0000) wValue=0200 wLength=1
[INF] processEventSetup: interface=UVC_INTF_VIDEO_CONTROL(0) entity=UVC_VC_ENT_INTERFACE(0) control=UVC_VC_REQUEST_ERROR_CODE_CONTROL(2)
[INF] UVC_EVENT_SETUP: bRequestType=>CI(a1) bRequest=UVC_GET_DEF(87) wIndex=[ent=2 if=0](0200) wValue=0200 wLength=2
[INF] processEventSetup: interface=UVC_INTF_VIDEO_CONTROL(0) entity=UVC_VC_ENT_PROCESSING_UNIT_ID(2) control=UVC_PU_BRIGHTNESS_CONTROL(2)
[ERR] processEventSetup: interface=UVC_INTF_VIDEO_CONTROL(0) entity=UVC_VC_ENT_PROCESSING_UNIT_ID(2) control=UVC_PU_BRIGHTNESS_CONTROL(2) not found
[INF] UVC_EVENT_SETUP: bRequestType=>CI(a1) bRequest=UVC_GET_CUR(81) wIndex=[ent=0 if=0](0000) wValue=0200 wLength=1
[INF] processEventSetup: interface=UVC_INTF_VIDEO_CONTROL(0) entity=UVC_VC_ENT_INTERFACE(0) control=UVC_VC_REQUEST_ERROR_CODE_CONTROL(2)
[INF] UVC_EVENT_SETUP: bRequestType=<CI(21) bRequest=UVC_SET_CUR(01) wIndex=[ent=0 if=1](0001) wValue=0100 wLength=34
[INF] processEventSetup: interface=UVC_INTF_VIDEO_STREAMING(1) entity=UVC_VS_ENT_INTERFACE(0) control=UVC_VS_PROBE_CONTROL(1)
[ERR] uvcHandleVsInterfaceProbeCommitControl: UVC_SET_CUR not implemented (cs=1)
[INF] uvc_gadget: UVC_EVENT_DATA length=34
[ERR] processEventData: not implemented (length=34), control_selector=1
[INF] UVC_EVENT_SETUP: bRequestType=>CI(a1) bRequest=UVC_GET_MIN(82) wIndex=[ent=0 if=1](0001) wValue=0100 wLength=34
[INF] processEventSetup: interface=UVC_INTF_VIDEO_STREAMING(1) entity=UVC_VS_ENT_INTERFACE(0) control=UVC_VS_PROBE_CONTROL(1)
[INF] UVC_EVENT_SETUP: bRequestType=>CI(a1) bRequest=UVC_GET_MAX(83) wIndex=[ent=0 if=1](0001) wValue=0100 wLength=34
[INF] processEventSetup: interface=UVC_INTF_VIDEO_STREAMING(1) entity=UVC_VS_ENT_INTERFACE(0) control=UVC_VS_PROBE_CONTROL(1)
[INF] UVC_EVENT_SETUP: bRequestType=<CI(21) bRequest=UVC_SET_CUR(01) wIndex=[ent=0 if=1](0001) wValue=0100 wLength=34
[INF] processEventSetup: interface=UVC_INTF_VIDEO_STREAMING(1) entity=UVC_VS_ENT_INTERFACE(0) control=UVC_VS_PROBE_CONTROL(1)
[ERR] uvcHandleVsInterfaceProbeCommitControl: UVC_SET_CUR not implemented (cs=1)
...
[INF] uvc_gadget: UVC_EVENT_DATA length=34
[ERR] processEventData: not implemented (length=34), control_selector=1
[INF] UVC_EVENT_SETUP: bRequestType=>CI(a1) bRequest=UVC_GET_CUR(81) wIndex=[ent=0 if=1](0001) wValue=0100 wLength=34
[INF] processEventSetup: interface=UVC_INTF_VIDEO_STREAMING(1) entity=UVC_VS_ENT_INTERFACE(0) control=UVC_VS_PROBE_CONTROL(1)
[INF] UVC_EVENT_SETUP: bRequestType=<CI(21) bRequest=UVC_SET_CUR(01) wIndex=[ent=0 if=1](0001) wValue=0200 wLength=34
[INF] processEventSetup: interface=UVC_INTF_VIDEO_STREAMING(1) entity=UVC_VS_ENT_INTERFACE(0) control=UVC_VS_COMMIT_CONTROL(2)
[ERR] uvcHandleVsInterfaceProbeCommitControl: UVC_SET_CUR not implemented (cs=2)
[INF] uvc_gadget: UVC_EVENT_DATA length=34

V4L2 controls

[INF] [fd=3] ctrl_ext[0]: id=(9961473)UNKNOWN type=V4L2_CTRL_TYPE_CTRL_CLASS name='User Controls' range=[0.+0.0] def=0 cur=0 flags=00000044
[INF]  V4L2_CTRL_FLAG_READ_ONLY
[INF]  V4L2_CTRL_FLAG_WRITE_ONLY
[INF] [fd=3] ctrl_ext[1]: id=(9963793)V4L2_CID_EXPOSURE type=V4L2_CTRL_TYPE_INTEGER name='Exposure' range=[4.+1.1028] def=1028 cur=1028 flags=00000000
[INF] [fd=3] ctrl_ext[2]: id=(9963796)V4L2_CID_HFLIP type=V4L2_CTRL_TYPE_BOOLEAN name='Horizontal Flip' range=[0.+1.1] def=0 cur=1 flags=00000400
[INF]  V4L2_CTRL_FLAG_MODIFY_LAYOUT
[INF] [fd=3] ctrl_ext[3]: id=(9963797)V4L2_CID_VFLIP type=V4L2_CTRL_TYPE_BOOLEAN name='Vertical Flip' range=[0.+1.1] def=0 cur=1 flags=00000400
[INF]  V4L2_CTRL_FLAG_MODIFY_LAYOUT
[INF] [fd=3] ctrl_ext[4]: id=(10092545)UNKNOWN type=V4L2_CTRL_TYPE_CTRL_CLASS name='Camera Controls' range=[0.+0.0] def=0 cur=0 flags=00000044
[INF]  V4L2_CTRL_FLAG_READ_ONLY
[INF]  V4L2_CTRL_FLAG_WRITE_ONLY
[INF] [fd=3] ctrl_ext[5]: id=(10094882)V4L2_CID_CAMERA_ORIENTATION type=V4L2_CTRL_TYPE_MENU name='Camera Orientation' range=[0.+1.2] def=2 cur=2 flags=00000004
[INF]  V4L2_CTRL_FLAG_READ_ONLY
[INF]   menuitem[0]: name=Front
[INF]   menuitem[1]: name=Back
[INF]   menuitem[2]: -> name=External
[INF] [fd=3] ctrl_ext[6]: id=(10094883)V4L2_CID_CAMERA_SENSOR_ROTATION type=V4L2_CTRL_TYPE_INTEGER name='Camera Sensor Rotation' range=[180.+1.180] def=180 cur=180 flags=
00000004
[INF]  V4L2_CTRL_FLAG_READ_ONLY
[INF] [fd=3] ctrl_ext[7]: id=(10354689)UNKNOWN type=V4L2_CTRL_TYPE_CTRL_CLASS name='Image Source Controls' range=[0.+0.0] def=0 cur=0 flags=00000044
[INF]  V4L2_CTRL_FLAG_READ_ONLY
[INF]  V4L2_CTRL_FLAG_WRITE_ONLY
[INF] [fd=3] ctrl_ext[8]: id=(10356993)V4L2_CID_VBLANK type=V4L2_CTRL_TYPE_INTEGER name='Vertical Blanking' range=[60.+1.8383010] def=60 cur=60 flags=00000000
[INF] [fd=3] ctrl_ext[9]: id=(10356994)V4L2_CID_HBLANK type=V4L2_CTRL_TYPE_INTEGER name='Horizontal Blanking' range=[5332.+1.65520] def=5332 cur=5332 flags=00000000
[INF] [fd=3] ctrl_ext[10]: id=(10356995)V4L2_CID_ANALOGUE_GAIN type=V4L2_CTRL_TYPE_INTEGER name='Analogue Gain' range=[0.+1.978] def=0 cur=896 flags=00000000
[INF] [fd=3] ctrl_ext[11]: id=(10356996)V4L2_CID_TEST_PATTERN_RED type=V4L2_CTRL_TYPE_INTEGER name='Red Pixel Value' range=[0.+1.4095] def=4095 cur=4095 flags=00000000
[INF] [fd=3] ctrl_ext[12]: id=(10356997)V4L2_CID_TEST_PATTERN_GREENR type=V4L2_CTRL_TYPE_INTEGER name='Green (Red) Pixel Value' range=[0.+1.4095] def=4095 cur=4095 flags=
00000000
[INF] [fd=3] ctrl_ext[13]: id=(10356998)V4L2_CID_TEST_PATTERN_BLUE type=V4L2_CTRL_TYPE_INTEGER name='Blue Pixel Value' range=[0.+1.4095] def=4095 cur=4095 flags=00000000
[INF] [fd=3] ctrl_ext[14]: id=(10356999)V4L2_CID_TEST_PATTERN_GREENB type=V4L2_CTRL_TYPE_INTEGER name='Green (Blue) Pixel Value' range=[0.+1.4095] def=4095 cur=4095 flags
=00000000
[INF] [fd=3] ctrl_ext[15]: id=(10420225)UNKNOWN type=V4L2_CTRL_TYPE_CTRL_CLASS name='Image Processing Controls' range=[0.+0.0] def=0 cur=0 flags=00000044
[INF]  V4L2_CTRL_FLAG_READ_ONLY
[INF]  V4L2_CTRL_FLAG_WRITE_ONLY
[INF] [fd=3] ctrl_ext[16]: id=(10422530)V4L2_CID_PIXEL_RATE type=V4L2_CTRL_TYPE_INTEGER64 name='Pixel Rate' range=[840000000.+1.840000000] def=840000000 cur=840000000 fla
gs=00000004
[INF]  V4L2_CTRL_FLAG_READ_ONLY
[INF] [fd=3] ctrl_ext[17]: id=(10422531)V4L2_CID_TEST_PATTERN type=V4L2_CTRL_TYPE_MENU name='Test Pattern' range=[0.+1.4] def=0 cur=0 flags=00000000
[INF]   menuitem[0]: -> name=Disabled
[INF]   menuitem[1]: name=Color Bars
[INF]   menuitem[2]: name=Solid Color
[INF]   menuitem[3]: name=Grey Color Bars
[INF]   menuitem[4]: name=PN9
[INF] [fd=3] ctrl_ext[18]: id=(10422533)V4L2_CID_DIGITAL_GAIN type=V4L2_CTRL_TYPE_INTEGER name='Digital Gain' range=[256.+1.65535] def=256 cur=256 flags=00000000
[INF] Total ext controls: 19


[INF] [fd=8] ctrl_ext[0]: id=(9961473)UNKNOWN type=V4L2_CTRL_TYPE_CTRL_CLASS name='User Controls' range=[0.+0.0] def=0 cur=0 flags=00000044
[INF]  V4L2_CTRL_FLAG_READ_ONLY
[INF]  V4L2_CTRL_FLAG_WRITE_ONLY
[INF] [fd=8] ctrl_ext[1]: id=(9963790)V4L2_CID_RED_BALANCE type=V4L2_CTRL_TYPE_INTEGER name='Red Balance' range=[1.+1.65535] def=1000 cur=3285 flags=00000020
[INF]  V4L2_CTRL_FLAG_SLIDER
[INF] [fd=8] ctrl_ext[2]: id=(9963791)V4L2_CID_BLUE_BALANCE type=V4L2_CTRL_TYPE_INTEGER name='Blue Balance' range=[1.+1.65535] def=1000 cur=1618 flags=00000020
[INF]  V4L2_CTRL_FLAG_SLIDER
[INF] [fd=8] ctrl_ext[3]: id=(9968097)UNKNOWN type=V4L2_CTRL_TYPE_U8 name='Colour Correction Matrix' range=[0.+1.255] def=0 cur=0 flags=00000100
[INF]  V4L2_CTRL_FLAG_HAS_PAYLOAD
[INF] [fd=8] ctrl_ext[4]: id=(9968098)UNKNOWN type=V4L2_CTRL_TYPE_U8 name='Lens Shading' range=[0.+1.255] def=0 cur=0 flags=00000300
[INF]  V4L2_CTRL_FLAG_HAS_PAYLOAD
[INF]  V4L2_CTRL_FLAG_EXECUTE_ON_WRITE
[INF] [fd=8] ctrl_ext[5]: id=(9968099)UNKNOWN type=V4L2_CTRL_TYPE_U8 name='Black Level' range=[0.+1.255] def=0 cur=0 flags=00000100
[INF]  V4L2_CTRL_FLAG_HAS_PAYLOAD
[INF] [fd=8] ctrl_ext[6]: id=(9968100)UNKNOWN type=V4L2_CTRL_TYPE_U8 name='Green Equalisation' range=[0.+1.255] def=0 cur=0 flags=00000100
[INF]  V4L2_CTRL_FLAG_HAS_PAYLOAD
[INF] [fd=8] ctrl_ext[7]: id=(9968101)UNKNOWN type=V4L2_CTRL_TYPE_U8 name='Gamma' range=[0.+1.255] def=0 cur=0 flags=00000100
[INF]  V4L2_CTRL_FLAG_HAS_PAYLOAD
[INF] [fd=8] ctrl_ext[8]: id=(9968102)UNKNOWN type=V4L2_CTRL_TYPE_U8 name='Denoise' range=[0.+1.255] def=0 cur=0 flags=00000100
[INF]  V4L2_CTRL_FLAG_HAS_PAYLOAD
[INF] [fd=8] ctrl_ext[9]: id=(9968103)UNKNOWN type=V4L2_CTRL_TYPE_U8 name='Sharpen' range=[0.+1.255] def=0 cur=0 flags=00000100
[INF]  V4L2_CTRL_FLAG_HAS_PAYLOAD
[INF] [fd=8] ctrl_ext[10]: id=(9968104)UNKNOWN type=V4L2_CTRL_TYPE_U8 name='Defective Pixel Correction' range=[0.+1.255] def=0 cur=0 flags=00000100
[INF]  V4L2_CTRL_FLAG_HAS_PAYLOAD
[INF] [fd=8] ctrl_ext[11]: id=(9968105)UNKNOWN type=V4L2_CTRL_TYPE_U8 name='Colour Denoise' range=[0.+1.255] def=0 cur=0 flags=00000100
[INF]  V4L2_CTRL_FLAG_HAS_PAYLOAD
[INF] [fd=8] ctrl_ext[12]: id=(10420225)UNKNOWN type=V4L2_CTRL_TYPE_CTRL_CLASS name='Image Processing Controls' range=[0.+0.0] def=0 cur=0 flags=00000044
[INF]  V4L2_CTRL_FLAG_READ_ONLY
[INF]  V4L2_CTRL_FLAG_WRITE_ONLY
[INF] [fd=8] ctrl_ext[13]: id=(10422533)V4L2_CID_DIGITAL_GAIN type=V4L2_CTRL_TYPE_INTEGER name='Digital Gain' range=[1.+1.65535] def=1000 cur=1000 flags=00000000
[INF] Total ext controls: 14


[INF] [fd=13] ctrl_ext[0]: id=(10289153)UNKNOWN type=V4L2_CTRL_TYPE_CTRL_CLASS name='JPEG Compression Controls' range=[0.+0.0] def=0 cur=0 flags=00000044
[INF]  V4L2_CTRL_FLAG_READ_ONLY
[INF]  V4L2_CTRL_FLAG_WRITE_ONLY
[INF] [fd=13] ctrl_ext[1]: id=(10291459)V4L2_CID_JPEG_COMPRESSION_QUALITY type=V4L2_CTRL_TYPE_INTEGER name='Compression Quality' range=[1.+1.100] def=80 cur=80 flags=0000
0000
[INF] Total ext controls: 2


Filtered controls:
subdev/sensor:
[INF] [fd=3] ctrl_ext[1]: id=(9963793)V4L2_CID_EXPOSURE type=V4L2_CTRL_TYPE_INTEGER name='Exposure' range=[4.+1.1028] def=1028 cur=1028 flags=00000000
[INF] [fd=3] ctrl_ext[10]: id=(10356995)V4L2_CID_ANALOGUE_GAIN type=V4L2_CTRL_TYPE_INTEGER name='Analogue Gain' range=[0.+1.978] def=0 cur=896 flags=00000000
[INF] [fd=3] ctrl_ext[18]: id=(10422533)V4L2_CID_DIGITAL_GAIN type=V4L2_CTRL_TYPE_INTEGER name='Digital Gain' range=[256.+1.65535] def=256 cur=256 flags=00000000

ISP:
[INF] [fd=8] ctrl_ext[1]: id=(9963790)V4L2_CID_RED_BALANCE type=V4L2_CTRL_TYPE_INTEGER name='Red Balance' range=[1.+1.65535] def=1000 cur=3285 flags=00000020
[INF] [fd=8] ctrl_ext[2]: id=(9963791)V4L2_CID_BLUE_BALANCE type=V4L2_CTRL_TYPE_INTEGER name='Blue Balance' range=[1.+1.65535] def=1000 cur=1618 flags=00000020
[INF] [fd=8] ctrl_ext[13]: id=(10422533)V4L2_CID_DIGITAL_GAIN type=V4L2_CTRL_TYPE_INTEGER name='Digital Gain' range=[1.+1.65535] def=1000 cur=1000 flags=00000000
[INF] Total ext controls: 14

Encoder:
[INF] [fd=13] ctrl_ext[1]: id=(10291459)V4L2_CID_JPEG_COMPRESSION_QUALITY type=V4L2_CTRL_TYPE_INTEGER name='Compression Quality' range=[1.+1.100] def=80 cur=80 flags=0000

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NOTES.md

NOTES.md

Всякое знание про камеры на малине

TODO ПРОЧИТАЙ

Аппаратчики

Софтня

Разное

v4l2

Доки

Примеры

Showmewebcam OS

Raspberry Pi OS

Примеры

ustreamer

uvc-gadget

cameractl

https://github.com/ayufan/camera-streamer

https://github.com/kinweilee/v4l2-mmal-uvc

План работ

ETC

UVC and controls

UVC controls being read

V4L2 controls

Files

NOTES.md

Latest commit

History

NOTES.md

File metadata and controls

Всякое знание про камеры на малине

TODO ПРОЧИТАЙ

Аппаратчики

Софтня

Разное

v4l2

Доки

Примеры

Showmewebcam OS

Raspberry Pi OS

Примеры

ustreamer

uvc-gadget

cameractl

https://github.com/ayufan/camera-streamer

https://github.com/kinweilee/v4l2-mmal-uvc

План работ

ETC

UVC and controls

UVC controls being read

V4L2 controls