The Linux Kernel
  • Linux Kernel Documentation
    • Introduction
    • Sphinx Build
    • Writing Documentation
      • Specific guidelines for the kernel documentation
      • list tables
    • Including kernel-doc comments
    • Writing kernel-doc comments
      • How to format kernel-doc comments
      • Highlights and cross-references
        • Cross-referencing from reStructuredText
      • Function documentation
      • Structure, union, and enumeration documentation
        • In-line member documentation comments
        • Private members
      • Typedef documentation
      • Overview documentation comments
      • Recommendations
    • DocBook XML [DEPRECATED]
      • Converting DocBook to Sphinx
      • Components of the kernel-doc system
      • How to use kernel-doc comments in DocBook XML template files
  • Linux Media Infrastructure userspace API
    • Introduction
    • Part I - Video for Linux API
      • 1. Common API Elements
        • 1.1. Opening and Closing Devices
        • 1.2. Querying Capabilities
        • 1.3. Application Priority
        • 1.4. Video Inputs and Outputs
        • 1.5. Audio Inputs and Outputs
        • 1.6. Tuners and Modulators
        • 1.7. Video Standards
        • 1.8. Digital Video (DV) Timings
        • 1.9. User Controls
        • 1.10. Extended Controls
        • 1.11. Data Formats
        • 1.12. Single- and multi-planar APIs
        • 1.13. Image Cropping, Insertion and Scaling
        • 1.14. API for cropping, composing and scaling
        • 1.15. Streaming Parameters
      • 2. Image Formats
        • 2.1. Single-planar format structure
        • 2.2. Multi-planar format structures
        • 2.3. Standard Image Formats
        • 2.4. Colorspaces
        • 2.5. Defining Colorspaces in V4L2
        • 2.6. Detailed Colorspace Descriptions
        • 2.7. Detailed Transfer Function Descriptions
        • 2.8. Indexed Format
        • 2.9. RGB Formats
        • 2.10. YUV Formats
        • 2.11. Depth Formats
        • 2.12. Compressed Formats
        • 2.13. SDR Formats
        • 2.14. Reserved Format Identifiers
      • 3. Input/Output
        • 3.1. Read/Write
        • 3.2. Streaming I/O (Memory Mapping)
        • 3.3. Streaming I/O (User Pointers)
        • 3.4. Streaming I/O (DMA buffer importing)
        • 3.5. Asynchronous I/O
        • 3.6. Buffers
        • 3.7. Field Order
      • 4. Interfaces
        • 4.1. Video Capture Interface
        • 4.2. Video Overlay Interface
        • 4.3. Video Output Interface
        • 4.4. Video Output Overlay Interface
        • 4.5. Codec Interface
        • 4.6. Effect Devices Interface
        • 4.7. Raw VBI Data Interface
        • 4.8. Sliced VBI Data Interface
        • 4.9. Teletext Interface
        • 4.10. Radio Interface
        • 4.11. RDS Interface
        • 4.12. Software Defined Radio Interface (SDR)
        • 4.13. Event Interface
        • 4.14. Sub-device Interface
      • 5. V4L2 Driver Programming
      • 6. Libv4l Userspace Library
        • 6.1. Introduction
      • 7. Changes
        • 7.1. Differences between V4L and V4L2
        • 7.2. Changes of the V4L2 API
      • 8. Function Reference
        • 8.1. V4L2 close()
        • 8.2. V4L2 ioctl()
        • 8.3. ioctl VIDIOC_CREATE_BUFS
        • 8.4. ioctl VIDIOC_CROPCAP
        • 8.5. ioctl VIDIOC_DBG_G_CHIP_INFO
        • 8.6. ioctl VIDIOC_DBG_G_REGISTER, VIDIOC_DBG_S_REGISTER
        • 8.7. ioctl VIDIOC_DECODER_CMD, VIDIOC_TRY_DECODER_CMD
        • 8.8. ioctl VIDIOC_DQEVENT
        • 8.9. ioctl VIDIOC_DV_TIMINGS_CAP, VIDIOC_SUBDEV_DV_TIMINGS_CAP
        • 8.10. ioctl VIDIOC_ENCODER_CMD, VIDIOC_TRY_ENCODER_CMD
        • 8.11. ioctl VIDIOC_ENUMAUDIO
        • 8.12. ioctl VIDIOC_ENUMAUDOUT
        • 8.13. ioctl VIDIOC_ENUM_DV_TIMINGS, VIDIOC_SUBDEV_ENUM_DV_TIMINGS
        • 8.14. ioctl VIDIOC_ENUM_FMT
        • 8.15. ioctl VIDIOC_ENUM_FRAMESIZES
        • 8.16. ioctl VIDIOC_ENUM_FRAMEINTERVALS
        • 8.17. ioctl VIDIOC_ENUM_FREQ_BANDS
        • 8.18. ioctl VIDIOC_ENUMINPUT
        • 8.19. ioctl VIDIOC_ENUMOUTPUT
        • 8.20. ioctl VIDIOC_ENUMSTD
        • 8.21. ioctl VIDIOC_EXPBUF
        • 8.22. ioctl VIDIOC_G_AUDIO, VIDIOC_S_AUDIO
        • 8.23. ioctl VIDIOC_G_AUDOUT, VIDIOC_S_AUDOUT
        • 8.24. ioctl VIDIOC_G_CROP, VIDIOC_S_CROP
        • 8.25. ioctl VIDIOC_G_CTRL, VIDIOC_S_CTRL
        • 8.26. ioctl VIDIOC_G_DV_TIMINGS, VIDIOC_S_DV_TIMINGS
        • 8.27. ioctl VIDIOC_G_EDID, VIDIOC_S_EDID, VIDIOC_SUBDEV_G_EDID, VIDIOC_SUBDEV_S_EDID
        • 8.28. ioctl VIDIOC_G_ENC_INDEX
        • 8.29. ioctl VIDIOC_G_EXT_CTRLS, VIDIOC_S_EXT_CTRLS, VIDIOC_TRY_EXT_CTRLS
        • 8.30. ioctl VIDIOC_G_FBUF, VIDIOC_S_FBUF
        • 8.31. ioctl VIDIOC_G_FMT, VIDIOC_S_FMT, VIDIOC_TRY_FMT
        • 8.32. ioctl VIDIOC_G_FREQUENCY, VIDIOC_S_FREQUENCY
        • 8.33. ioctl VIDIOC_G_INPUT, VIDIOC_S_INPUT
        • 8.34. ioctl VIDIOC_G_JPEGCOMP, VIDIOC_S_JPEGCOMP
        • 8.35. ioctl VIDIOC_G_MODULATOR, VIDIOC_S_MODULATOR
        • 8.36. ioctl VIDIOC_G_OUTPUT, VIDIOC_S_OUTPUT
        • 8.37. ioctl VIDIOC_G_PARM, VIDIOC_S_PARM
        • 8.38. ioctl VIDIOC_G_PRIORITY, VIDIOC_S_PRIORITY
        • 8.39. ioctl VIDIOC_G_SELECTION, VIDIOC_S_SELECTION
        • 8.40. ioctl VIDIOC_G_SLICED_VBI_CAP
        • 8.41. ioctl VIDIOC_G_STD, VIDIOC_S_STD
        • 8.42. ioctl VIDIOC_G_TUNER, VIDIOC_S_TUNER
        • 8.43. ioctl VIDIOC_LOG_STATUS
        • 8.44. ioctl VIDIOC_OVERLAY
        • 8.45. ioctl VIDIOC_PREPARE_BUF
        • 8.46. ioctl VIDIOC_QBUF, VIDIOC_DQBUF
        • 8.47. ioctl VIDIOC_QUERYBUF
        • 8.48. ioctl VIDIOC_QUERYCAP
        • 8.49. ioctls VIDIOC_QUERYCTRL, VIDIOC_QUERY_EXT_CTRL and VIDIOC_QUERYMENU
        • 8.50. ioctl VIDIOC_QUERY_DV_TIMINGS
        • 8.51. ioctl VIDIOC_QUERYSTD
        • 8.52. ioctl VIDIOC_REQBUFS
        • 8.53. ioctl VIDIOC_S_HW_FREQ_SEEK
        • 8.54. ioctl VIDIOC_STREAMON, VIDIOC_STREAMOFF
        • 8.55. ioctl VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL
        • 8.56. ioctl VIDIOC_SUBDEV_ENUM_FRAME_SIZE
        • 8.57. ioctl VIDIOC_SUBDEV_ENUM_MBUS_CODE
        • 8.58. ioctl VIDIOC_SUBDEV_G_CROP, VIDIOC_SUBDEV_S_CROP
        • 8.59. ioctl VIDIOC_SUBDEV_G_FMT, VIDIOC_SUBDEV_S_FMT
        • 8.60. ioctl VIDIOC_SUBDEV_G_FRAME_INTERVAL, VIDIOC_SUBDEV_S_FRAME_INTERVAL
        • 8.61. ioctl VIDIOC_SUBDEV_G_SELECTION, VIDIOC_SUBDEV_S_SELECTION
        • 8.62. ioctl VIDIOC_SUBSCRIBE_EVENT, VIDIOC_UNSUBSCRIBE_EVENT
        • 8.63. V4L2 mmap()
        • 8.64. V4L2 munmap()
        • 8.65. V4L2 open()
        • 8.66. V4L2 poll()
        • 8.67. V4L2 read()
        • 8.68. V4L2 select()
        • 8.69. V4L2 write()
      • 9. Common definitions for V4L2 and V4L2 subdev interfaces
        • 9.1. Common selection definitions
      • 10. Video For Linux Two Header File
        • 10.1. videodev2.h
      • 11. Video Capture Example
        • 11.1. file: media/v4l/capture.c
      • 12. Video Grabber example using libv4l
        • 12.1. file: media/v4l/v4l2grab.c
      • 13. References
        • 13.1. CEA 608-E
        • 13.2. EN 300 294
        • 13.3. ETS 300 231
        • 13.4. ETS 300 706
        • 13.5. ISO 13818-1
        • 13.6. ISO 13818-2
        • 13.7. ITU BT.470
        • 13.8. ITU BT.601
        • 13.9. ITU BT.653
        • 13.10. ITU BT.709
        • 13.11. ITU BT.1119
        • 13.12. JFIF
        • 13.13. ITU-T.81
        • 13.14. W3C JPEG JFIF
        • 13.15. SMPTE 12M
        • 13.16. SMPTE 170M
        • 13.17. SMPTE 240M
        • 13.18. SMPTE RP 431-2
        • 13.19. SMPTE ST 2084
        • 13.20. sRGB
        • 13.21. sYCC
        • 13.22. xvYCC
        • 13.23. AdobeRGB
        • 13.24. opRGB
        • 13.25. ITU BT.2020
        • 13.26. EBU Tech 3213
        • 13.27. IEC 62106
        • 13.28. NRSC-4-B
        • 13.29. ISO 12232:2006
        • 13.30. CEA-861-E
        • 13.31. VESA DMT
        • 13.32. EDID
        • 13.33. HDCP
        • 13.34. HDMI
        • 13.35. HDMI2
        • 13.36. DP
        • 13.37. poynton
        • 13.38. colimg
      • Revision and Copyright
      • Revision History
    • Part II - Digital TV API
      • 1. Introduction
        • 1.1. What you need to know
        • 1.2. History
        • 1.3. Overview
        • 1.4. Linux DVB Devices
        • 1.5. API include files
      • 2. DVB Frontend API
        • 2.1. Querying frontend information
        • 2.2. Querying frontend status and statistics
        • 2.3. DVB Frontend properties
        • 2.4. Example: Setting digital TV frontend properties
        • 2.5. Frontend Function Calls
        • 2.6. DVB Frontend legacy API (a. k. a. DVBv3)
      • 3. DVB Demux Device
        • 3.1. Demux Data Types
        • 3.2. Demux Function Calls
      • 4. DVB CA Device
        • 4.1. CA Data Types
        • 4.2. CA Function Calls
      • 5. DVB Network API
      • 6. DVB net Function Calls
        • 6.1. ioctl NET_ADD_IF
        • 6.2. ioctl NET_REMOVE_IF
        • 6.3. ioctl NET_GET_IF
      • 7. DVB Deprecated APIs
        • 7.1. DVB Video Device
        • 7.2. DVB Audio Device
      • 8. Examples
        • 8.1. Example: Tuning
        • 8.2. Example: The DVR device
      • 9. DVB Audio Header File
        • 9.1. audio.h
      • 10. DVB Conditional Access Header File
        • 10.1. ca.h
      • 11. DVB Demux Header File
        • 11.1. dmx.h
      • 12. DVB Frontend Header File
        • 12.1. frontend.h
      • 13. DVB Network Header File
        • 13.1. net.h
      • 14. DVB Video Header File
        • 14.1. video.h
      • Revision and Copyright
      • Revision History
    • Part III - Remote Controller API
      • 1. Introduction
      • 2. Remote Controller’s sysfs nodes
        • 2.1. /sys/class/rc/
        • 2.2. /sys/class/rc/rcN/
        • 2.3. /sys/class/rc/rcN/protocols
        • 2.4. /sys/class/rc/rcN/filter
        • 2.5. /sys/class/rc/rcN/filter_mask
        • 2.6. /sys/class/rc/rcN/wakeup_protocols
        • 2.7. /sys/class/rc/rcN/wakeup_filter
        • 2.8. /sys/class/rc/rcN/wakeup_filter_mask
      • 3. Remote controller tables
      • 4. Changing default Remote Controller mappings
        • 4.1. file: uapi/v4l/keytable.c
      • 5. LIRC Device Interface
        • 5.1. Introduction
        • 5.2. LIRC modes
        • 5.3. LIRC Function Reference
        • 5.4. LIRC Header File
      • Revision and Copyright
      • Revision History
    • Part IV - Media Controller API
      • 1. Introduction
      • 2. Media device model
      • 3. Types and flags used to represent the media graph elements
      • 4. Function Reference
        • 4.1. media open()
        • 4.2. media close()
        • 4.3. media ioctl()
        • 4.4. ioctl MEDIA_IOC_DEVICE_INFO
        • 4.5. ioctl MEDIA_IOC_G_TOPOLOGY
        • 4.6. ioctl MEDIA_IOC_ENUM_ENTITIES
        • 4.7. ioctl MEDIA_IOC_ENUM_LINKS
        • 4.8. ioctl MEDIA_IOC_SETUP_LINK
      • 5. Media Controller Header File
        • 5.1. media.h
      • Revision and Copyright
      • Revision History
    • Part V - Consumer Electronics Control API
      • 1. Introduction
      • 2. Function Reference
        • 2.1. cec open()
        • 2.2. cec close()
        • 2.3. cec ioctl()
        • 2.4. cec poll()
        • 2.5. ioctl CEC_ADAP_G_CAPS
        • 2.6. ioctls CEC_ADAP_G_LOG_ADDRS and CEC_ADAP_S_LOG_ADDRS
        • 2.7. ioctls CEC_ADAP_G_PHYS_ADDR and CEC_ADAP_S_PHYS_ADDR
        • 2.8. ioctl CEC_DQEVENT
        • 2.9. ioctls CEC_G_MODE and CEC_S_MODE
        • 2.10. ioctls CEC_RECEIVE and CEC_TRANSMIT
      • 3. CEC Header File
        • 3.1. cec.h
      • Revision and Copyright
      • Revision History
    • Generic Error Codes
    • GNU Free Documentation License
      • 0. PREAMBLE
      • 1. APPLICABILITY AND DEFINITIONS
      • 2. VERBATIM COPYING
      • 3. COPYING IN QUANTITY
      • 4. MODIFICATIONS
      • 5. COMBINING DOCUMENTS
      • 6. COLLECTIONS OF DOCUMENTS
      • 7. AGGREGATION WITH INDEPENDENT WORKS
      • 8. TRANSLATION
      • 9. TERMINATION
      • 10. FUTURE REVISIONS OF THIS LICENSE
      • Addendum
  • Media subsystem kernel internal API
    • 1. Video2Linux devices
      • 1.1. Introduction
      • 1.2. Structure of a V4L driver
      • 1.3. Structure of the V4L2 framework
      • 1.4. Video device’ s internal representation
        • 1.4.1. ioctls and locking
        • 1.4.2. Video device registration
        • 1.4.3. video device debugging
        • 1.4.4. Video device cleanup
        • 1.4.5. helper functions
        • 1.4.6. video_device functions and data structures
      • 1.5. V4L2 device instance
        • 1.5.1. v4l2_device functions and data structures
      • 1.6. V4L2 File handlers
        • 1.6.1. V4L2 fh functions and data structures
      • 1.7. V4L2 sub-devices
      • 1.8. V4L2 sub-device userspace API
      • 1.9. I2C sub-device drivers
      • 1.10. V4L2 sub-device functions and data structures
      • 1.11. V4L2 events
        • 1.11.1. Event subscription
        • 1.11.2. Unsubscribing an event
        • 1.11.3. Check if there’s a pending event
        • 1.11.4. How events work
      • 1.12. V4L2 Controls
        • 1.12.1. Introduction
        • 1.12.2. Objects in the framework
        • 1.12.3. Basic usage for V4L2 and sub-device drivers
        • 1.12.4. Inheriting Controls
        • 1.12.5. Accessing Control Values
        • 1.12.6. Menu Controls
        • 1.12.7. Custom Controls
        • 1.12.8. Active and Grabbed Controls
        • 1.12.9. Control Clusters
        • 1.12.10. Handling autogain/gain-type Controls with Auto Clusters
        • 1.12.11. VIDIOC_LOG_STATUS Support
        • 1.12.12. Different Handlers for Different Video Nodes
        • 1.12.13. Finding Controls
        • 1.12.14. Inheriting Controls
        • 1.12.15. V4L2_CTRL_TYPE_CTRL_CLASS Controls
        • 1.12.16. Adding Notify Callbacks
        • 1.12.17. v4l2_ctrl functions and data structures
      • 1.13. Videobuf Framework
        • 1.13.1. Introduction
        • 1.13.2. Buffer types
        • 1.13.3. Data structures, callbacks, and initialization
        • 1.13.4. File operations
        • 1.13.5. ioctl() operations
        • 1.13.6. Buffer allocation
        • 1.13.7. Filling the buffers
      • 1.14. V4L2 videobuf2 functions and data structures
      • 1.15. V4L2 clocks
      • 1.16. V4L2 DV Timings functions
      • 1.17. V4L2 flash functions and data structures
      • 1.18. V4L2 Media Controller functions and data structures
      • 1.19. V4L2 Media Bus functions and data structures
      • 1.20. V4L2 Memory to Memory functions and data structures
      • 1.21. V4L2 Open Firmware kAPI
      • 1.22. V4L2 rect helper functions
      • 1.23. Tuner functions and data structures
      • 1.24. V4L2 common functions and data structures
      • 1.25. Hauppauge TV EEPROM functions and data structures
    • 2. Digital TV (DVB) devices
    • 3. Digital TV Common functions
    • 4. Digital TV Frontend kABI
      • 4.1. Digital TV Frontend
    • 5. Digital TV Demux kABI
      • 5.1. Digital TV Demux
    • 6. Demux Callback API
      • 6.1. Demux Callback
    • 7. Digital TV Conditional Access kABI
    • 8. Remote Controller devices
      • 8.1. Remote Controller core
      • 8.2. LIRC
    • 9. Media Controller devices
      • 9.1. Media Controller
        • 9.1.1. Abstract media device model
        • 9.1.2. Media device
        • 9.1.3. Entities
        • 9.1.4. Interfaces
        • 9.1.5. Pads
        • 9.1.6. Links
        • 9.1.7. Graph traversal
        • 9.1.8. Use count and power handling
        • 9.1.9. Links setup
        • 9.1.10. Pipelines and media streams
        • 9.1.11. Link validation
  • Linux Digital TV driver-specific documentation
    • 1. Introdution
    • 2. HOWTO: Get An Avermedia DVB-T working under Linux
      • 2.1. Assumptions and Introduction
      • 2.2. The Avermedia DVB-T
      • 2.3. Getting the card going
      • 2.4. Receiving DVB-T in Australia
      • 2.5. Known Limitations
      • 2.6. Further Update
    • 3. How to get the bt8xx cards working
      • 3.1. General information
      • 3.2. Loading Modules
        • 3.2.1. Running TwinHan and Clones
        • 3.2.2. Running multiple cards
        • 3.2.3. Probing the cards with broken PCI subsystem ID
    • 4. Hardware supported by the linuxtv.org DVB drivers
    • 5. Digital TV Conditional Access Interface (CI API)
      • 5.1. ca_zap
      • 5.2. Cards that fall in this category
      • 5.3. CI modules that are supported
      • 5.4. The High level CI API
        • 5.4.1. For the programmer
      • 5.5. Why the need for another CI interface?
    • 6. Idea behind the dvb-usb-framework
      • 6.1. Supported devices
      • 6.2. How to use?
        • 6.2.1. Firmware
        • 6.2.2. Compiling
        • 6.2.3. Loading the drivers
      • 6.3. Known problems and bugs
        • 6.3.1. Adding support for devices
        • 6.3.2. USB1.1 Bandwidth limitation
        • 6.3.3. Comments
      • 6.4. 3. Acknowledgements
    • 7. FAQ
    • 8. Firmware files for lmedm04 cards
      • 8.1. For DM04+/QQBOX LME2510C (Sharp 7395 Tuner)
      • 8.2. For DM04 LME2510 (LG Tuner)
      • 8.3. For DM04 LME2510C (LG Tuner)
      • 8.4. For LME2510
      • 8.5. For LME2510C
    • 9. Opera firmware
    • 10. How to set up the Technisat/B2C2 Flexcop devices
      • 10.1. Find out what device you have
      • 10.2. Kernel compilation:
    • 11. TechnoTrend/Hauppauge DEC USB Driver
      • 11.1. Driver Status
      • 11.2. Getting the Firmware
      • 11.3. Hotplug Firmware Loading
    • 12. UDEV rules for DVB
    • 13. Contributors
  • Video4Linux (V4L) driver-specific documentation
    • 1. Guidelines for Linux4Linux pixel format 4CCs
      • 1.1. Raw bayer
    • 2. Infrared remote control support in video4linux drivers
      • 2.1. Basics
      • 2.2. How it works
    • 3. Using with lircd
    • 4. Using without lircd
    • 5. Tuner drivers
      • 5.1. Simple tuner Programming
      • 5.2. Tuner Manufacturers
    • 6. Cards List
      • 6.1. AU0828 cards list
      • 6.2. BTTV cards list
      • 6.3. cx23885 cards list
      • 6.4. CX88 cards list
      • 6.5. EM28xx cards list
      • 6.6. IVTV cards list
      • 6.7. SAA7134 cards list
      • 6.8. SAA7134 cards list
      • 6.9. TM6000 cards list
      • 6.10. Tuner cards list
      • 6.11. Usbvision cards list
      • 6.12. The gspca cards list
    • 7. The bttv driver
      • 7.1. Release notes for bttv
      • 7.2. Make bttv work with your card
      • 7.3. Autodetecting cards
      • 7.4. Still doesn’t work?
      • 7.5. Modprobe options
      • 7.6. If the box freezes hard with bttv
        • 7.6.1. bttv bugs
        • 7.6.2. hardware bugs
        • 7.6.3. other
      • 7.7. Bttv quirks
        • 7.7.1. Normal PCI Mode
        • 7.7.2. 430FX Compatibility Mode
        • 7.7.3. Interfacing with Non-PCI 2.1 Compliant Core Logic
      • 7.8. bttv and sound mini howto
        • 7.8.1. How sound works in detail
        • 7.8.2. Other elements of the tvcards array
      • 7.9. Cards
        • 7.9.1. Supported cards: Bt848/Bt848a/Bt849/Bt878/Bt879 cards
        • 7.9.2. MATRIX Vision
        • 7.9.3. Miro/Pinnacle PCTV
        • 7.9.4. Hauppauge Win/TV pci
        • 7.9.5. Askey CPH-Series
        • 7.9.6. Lifeview Flyvideo Series:
        • 7.9.7. Typhoon TV card series:
        • 7.9.8. Guillemot
        • 7.9.9. Mentor
        • 7.9.10. Prolink
        • 7.9.11. Dynalink
        • 7.9.12. Phoebemicro
        • 7.9.13. Genius/Kye
        • 7.9.14. Tekram
        • 7.9.15. Lucky Star
        • 7.9.16. Leadtek
        • 7.9.17. KNC One
        • 7.9.18. Provideo
        • 7.9.19. Highscreen
        • 7.9.20. Zoltrix
        • 7.9.21. AVerMedia
        • 7.9.22. Aimslab
        • 7.9.23. IXMicro (former: IMS=Integrated Micro Solutions)
        • 7.9.24. Lifetec/Medion/Tevion/Aldi
        • 7.9.25. Modular Technologies (www.modulartech.com) UK
        • 7.9.26. Terratec
        • 7.9.27. Technisat
        • 7.9.28. Siemens
        • 7.9.29. Powercolor
        • 7.9.30. Pinnacle
        • 7.9.31. Lenco
        • 7.9.32. Iomega
        • 7.9.33. LML
        • 7.9.34. Grandtec
        • 7.9.35. Koutech
        • 7.9.36. IODATA (jp)
        • 7.9.37. Canopus (jp)
        • 7.9.38. www.sigmacom.co.kr
        • 7.9.39. www.sasem.co.kr
        • 7.9.40. hama
        • 7.9.41. Sigma Designs
        • 7.9.42. Formac
        • 7.9.43. ATI
        • 7.9.44. Diamond Multimedia
        • 7.9.45. Aopen
        • 7.9.46. Intel
        • 7.9.47. STB
        • 7.9.48. Videologic
        • 7.9.49. Technotrend
        • 7.9.50. Teles
        • 7.9.51. Remote Vision
        • 7.9.52. Boeder
        • 7.9.53. Media-Surfer (esc-kathrein.de)
        • 7.9.54. Jetway (www.jetway.com.tw)
        • 7.9.55. Galaxis
        • 7.9.56. Hauppauge
        • 7.9.57. Matrix-Vision
        • 7.9.58. Conceptronic (.net)
        • 7.9.59. BestData
        • 7.9.60. Gallant (www.gallantcom.com) www.minton.com.tw
        • 7.9.61. Asonic (www.asonic.com.cn) (website down)
        • 7.9.62. Hoontech
        • 7.9.63. Teppro (www.itcteppro.com.tw)
        • 7.9.64. Kworld (www.kworld.com.tw)
        • 7.9.65. JTT/ Justy Corp.(http://www.jtt.ne.jp/)
        • 7.9.66. ADS www.adstech.com
        • 7.9.67. AVEC www.prochips.com
        • 7.9.68. NoBrand
        • 7.9.69. Mach www.machspeed.com
        • 7.9.70. Eline www.eline-net.com/
        • 7.9.71. Spirit
        • 7.9.72. Boser www.boser.com.tw
        • 7.9.73. Satelco www.citycom-gmbh.de, www.satelco.de
        • 7.9.74. Sensoray www.sensoray.com
        • 7.9.75. CEI (Chartered Electronics Industries Pte Ltd [CEI] [FCC ID HBY])
        • 7.9.76. AITech
        • 7.9.77. MAXRON
        • 7.9.78. www.ids-imaging.de
        • 7.9.79. www.sknet-web.co.jp
        • 7.9.80. A-Max www.amaxhk.com (Colormax, Amax, Napa)
        • 7.9.81. Cybertainment
        • 7.9.82. VCR (http://www.vcrinc.com/)
        • 7.9.83. Twinhan
        • 7.9.84. MSI
        • 7.9.85. Focus www.focusinfo.com
        • 7.9.86. Sdisilk www.sdisilk.com/
        • 7.9.87. www.euresys.com
        • 7.9.88. PMC/Pace
        • 7.9.89. Mercury www.kobian.com (UK and FR)
        • 7.9.90. TEC sound
        • 7.9.91. Lorenzen www.lorenzen.de
        • 7.9.92. Origo (.uk) www.origo2000.com
        • 7.9.93. I/O Magic www.iomagic.com
        • 7.9.94. Arowana
        • 7.9.95. iTVC15 boards
        • 7.9.96. Asus www.asuscom.com
        • 7.9.97. Hoontech
      • 7.10. Chips used at bttv devices
      • 7.11. Specs
      • 7.12. Thanks
      • 7.13. Contributors
    • 8. The cafe_ccic driver
      • 8.1. Introdution
      • 8.2. Load time options
    • 9. The cpia2 driver
      • 9.1. Introduction
      • 9.2. Features
      • 9.3. Making and installing the stv672 driver modules
        • 9.3.1. Requirements
        • 9.3.2. Setup
        • 9.3.3. Driver options
        • 9.3.4. Setting the options
        • 9.3.5. What buffer size should I use?
        • 9.3.6. How many buffers should I use?
        • 9.3.7. Using the camera
        • 9.3.8. Notes to developers
        • 9.3.9. Programmer’s overview of cpia2 driver
    • 10. The cx18 driver
    • 11. The cx2341x driver
      • 11.1. Memory at cx2341x chips
        • 11.1.1. Memory Map
        • 11.1.2. Registers
        • 11.1.3. Interrupt Status Register
      • 11.2. Missing documentation
      • 11.3. The cx2341x firmware upload
        • 11.3.1. How to find
        • 11.3.2. How to load
      • 11.4. How to call the firmware API
      • 11.5. OSD firmware API description
        • 11.5.1. CX2341X_OSD_GET_FRAMEBUFFER
        • 11.5.2. CX2341X_OSD_GET_PIXEL_FORMAT
        • 11.5.3. CX2341X_OSD_SET_PIXEL_FORMAT
        • 11.5.4. CX2341X_OSD_GET_STATE
        • 11.5.5. CX2341X_OSD_SET_STATE
        • 11.5.6. CX2341X_OSD_GET_OSD_COORDS
        • 11.5.7. CX2341X_OSD_SET_OSD_COORDS
        • 11.5.8. CX2341X_OSD_GET_SCREEN_COORDS
        • 11.5.9. CX2341X_OSD_SET_SCREEN_COORDS
        • 11.5.10. CX2341X_OSD_GET_GLOBAL_ALPHA
        • 11.5.11. CX2341X_OSD_SET_GLOBAL_ALPHA
        • 11.5.12. CX2341X_OSD_SET_BLEND_COORDS
        • 11.5.13. CX2341X_OSD_GET_FLICKER_STATE
        • 11.5.14. CX2341X_OSD_SET_FLICKER_STATE
        • 11.5.15. CX2341X_OSD_BLT_COPY
        • 11.5.16. CX2341X_OSD_BLT_FILL
        • 11.5.17. CX2341X_OSD_BLT_TEXT
        • 11.5.18. CX2341X_OSD_SET_FRAMEBUFFER_WINDOW
        • 11.5.19. CX2341X_OSD_SET_CHROMA_KEY
        • 11.5.20. CX2341X_OSD_GET_ALPHA_CONTENT_INDEX
        • 11.5.21. CX2341X_OSD_SET_ALPHA_CONTENT_INDEX
      • 11.6. Encoder firmware API description
        • 11.6.1. CX2341X_ENC_PING_FW
        • 11.6.2. CX2341X_ENC_START_CAPTURE
        • 11.6.3. CX2341X_ENC_STOP_CAPTURE
        • 11.6.4. CX2341X_ENC_SET_AUDIO_ID
        • 11.6.5. CX2341X_ENC_SET_VIDEO_ID
        • 11.6.6. CX2341X_ENC_SET_PCR_ID
        • 11.6.7. CX2341X_ENC_SET_FRAME_RATE
        • 11.6.8. CX2341X_ENC_SET_FRAME_SIZE
        • 11.6.9. CX2341X_ENC_SET_BIT_RATE
        • 11.6.10. CX2341X_ENC_SET_GOP_PROPERTIES
        • 11.6.11. CX2341X_ENC_SET_ASPECT_RATIO
        • 11.6.12. CX2341X_ENC_SET_DNR_FILTER_MODE
        • 11.6.13. CX2341X_ENC_SET_DNR_FILTER_PROPS
        • 11.6.14. CX2341X_ENC_SET_CORING_LEVELS
        • 11.6.15. CX2341X_ENC_SET_SPATIAL_FILTER_TYPE
        • 11.6.16. CX2341X_ENC_SET_VBI_LINE
        • 11.6.17. CX2341X_ENC_SET_STREAM_TYPE
        • 11.6.18. CX2341X_ENC_SET_OUTPUT_PORT
        • 11.6.19. CX2341X_ENC_SET_AUDIO_PROPERTIES
        • 11.6.20. CX2341X_ENC_HALT_FW
        • 11.6.21. CX2341X_ENC_GET_VERSION
        • 11.6.22. CX2341X_ENC_SET_GOP_CLOSURE
        • 11.6.23. CX2341X_ENC_GET_SEQ_END
        • 11.6.24. CX2341X_ENC_SET_PGM_INDEX_INFO
        • 11.6.25. CX2341X_ENC_SET_VBI_CONFIG
        • 11.6.26. CX2341X_ENC_SET_DMA_BLOCK_SIZE
        • 11.6.27. CX2341X_ENC_GET_PREV_DMA_INFO_MB_10
        • 11.6.28. CX2341X_ENC_GET_PREV_DMA_INFO_MB_9
        • 11.6.29. CX2341X_ENC_SCHED_DMA_TO_HOST
        • 11.6.30. CX2341X_ENC_INITIALIZE_INPUT
        • 11.6.31. CX2341X_ENC_SET_FRAME_DROP_RATE
        • 11.6.32. CX2341X_ENC_PAUSE_ENCODER
        • 11.6.33. CX2341X_ENC_REFRESH_INPUT
        • 11.6.34. CX2341X_ENC_SET_COPYRIGHT
        • 11.6.35. CX2341X_ENC_SET_EVENT_NOTIFICATION
        • 11.6.36. CX2341X_ENC_SET_NUM_VSYNC_LINES
        • 11.6.37. CX2341X_ENC_SET_PLACEHOLDER
        • 11.6.38. CX2341X_ENC_MUTE_VIDEO
        • 11.6.39. CX2341X_ENC_MUTE_AUDIO
        • 11.6.40. CX2341X_ENC_SET_VERT_CROP_LINE
        • 11.6.41. CX2341X_ENC_MISC
      • 11.7. Decoder firmware API description
        • 11.7.1. CX2341X_DEC_PING_FW
        • 11.7.2. CX2341X_DEC_START_PLAYBACK
        • 11.7.3. CX2341X_DEC_STOP_PLAYBACK
        • 11.7.4. CX2341X_DEC_SET_PLAYBACK_SPEED
        • 11.7.5. CX2341X_DEC_STEP_VIDEO
        • 11.7.6. CX2341X_DEC_SET_DMA_BLOCK_SIZE
        • 11.7.7. CX2341X_DEC_GET_XFER_INFO
        • 11.7.8. CX2341X_DEC_GET_DMA_STATUS
        • 11.7.9. CX2341X_DEC_SCHED_DMA_FROM_HOST
        • 11.7.10. CX2341X_DEC_PAUSE_PLAYBACK
        • 11.7.11. CX2341X_DEC_HALT_FW
        • 11.7.12. CX2341X_DEC_SET_STANDARD
        • 11.7.13. CX2341X_DEC_GET_VERSION
        • 11.7.14. CX2341X_DEC_SET_STREAM_INPUT
        • 11.7.15. CX2341X_DEC_GET_TIMING_INFO
        • 11.7.16. CX2341X_DEC_SET_AUDIO_MODE
        • 11.7.17. CX2341X_DEC_SET_EVENT_NOTIFICATION
        • 11.7.18. CX2341X_DEC_SET_DISPLAY_BUFFERS
        • 11.7.19. CX2341X_DEC_EXTRACT_VBI
        • 11.7.20. CX2341X_DEC_SET_DECODER_SOURCE
        • 11.7.21. CX2341X_DEC_SET_PREBUFFERING
      • 11.8. PVR350 Video decoder registers 0x02002800 -> 0x02002B00
      • 11.9. The cx231xx DMA engine
        • 11.9.1. Introduction
        • 11.9.2. Flow
        • 11.9.3. Mailbox #10
        • 11.9.4. Scatter-Gather Array
        • 11.9.5. DMA Transfer Status
      • 11.10. Non-compressed file format
        • 11.10.1. Raw format c example
      • 11.11. Format of embedded V4L2_MPEG_STREAM_VBI_FMT_IVTV VBI data
    • 12. The cx88 driver
      • 12.1. Current status
      • 12.2. How to add support for new cards
      • 12.3. Documentation missing at the cx88 datasheet
      • 12.4. Hauppauge WinTV cx88 IR information
        • 12.4.1. Additional info
    • 13. The VPBE V4L2 driver design
      • 13.1. File partitioning
      • 13.2. Functional partitioning
      • 13.3. Current status
      • 13.4. To be done
    • 14. The Samsung S5P/EXYNOS4 FIMC driver
      • 14.1. Supported SoCs
      • 14.2. Supported features
      • 14.3. Not currently supported
      • 14.4. Files partitioning
      • 14.5. User space interfaces
        • 14.5.1. Media device interface
        • 14.5.2. Memory-to-memory video node
        • 14.5.3. Capture video node
        • 14.5.4. Camera capture subdevs
        • 14.5.5. sysfs
      • 14.6. 5. Device mapping to video and subdev device nodes
      • 14.7. 7. Build
    • 15. The ivtv driver
      • 15.1. Features
      • 15.2. Additional features for the PVR-350 (CX23415 based)
      • 15.3. See also
      • 15.4. IRC
      • 15.5. Devices
      • 15.6. Base devices
    • 16. Vaio Picturebook Motion Eye Camera Driver
      • 16.1. Hardware supported
      • 16.2. Driver options
      • 16.3. Module use
      • 16.4. Usage:
      • 16.5. Private API
      • 16.6. Bugs / Todo
    • 17. OMAP 3 Image Signal Processor (ISP) driver
      • 17.1. Introduction
      • 17.2. Split to subdevs
      • 17.3. Controlling the OMAP 3 ISP
      • 17.4. Events
      • 17.5. Private IOCTLs
      • 17.6. CCDC and preview block IOCTLs
      • 17.7. Statistic blocks IOCTLs
      • 17.8. VIDIOC_OMAP3ISP_STAT_EN
      • 17.9. VIDIOC_OMAP3ISP_AEWB_CFG, VIDIOC_OMAP3ISP_HIST_CFG and VIDIOC_OMAP3ISP_AF_CFG
      • 17.10. VIDIOC_OMAP3ISP_STAT_REQ
      • 17.11. Technical reference manuals (TRMs) and other documentation
      • 17.12. References
    • 18. OMAP4 ISS Driver
      • 18.1. Introduction
      • 18.2. Tested platforms
      • 18.3. File list
      • 18.4. References
    • 19. The pvrusb2 driver
      • 19.1. Background
      • 19.2. Building
      • 19.3. Source file list / functional overview
    • 20. PXA-Camera Host Driver
      • 20.1. Constraints
      • 20.2. Global video workflow
      • 20.3. DMA usage
    • 21. The Radiotrack radio driver
      • 21.1. ACKNOWLEDGMENTS
      • 21.2. WHY THIS DOCUMENT?
      • 21.3. PHYSICAL DESCRIPTION
      • 21.4. CONTROLLING THE CARD WITH IOPORT
      • 21.5. PROGRAMMING EXAMPLES
    • 22. The saa7134 driver
      • 22.1. Status
      • 22.2. Build
      • 22.3. Changes / Fixes
      • 22.4. Known Problems
      • 22.5. Card Variations:
      • 22.6. LifeView GPIOs
      • 22.7. Credits
    • 23. Cropping and Scaling algorithm, used in the sh_mobile_ceu_camera driver
      • 23.1. Terminology
      • 23.2. Generic scaling / cropping scheme
      • 23.3. S_FMT
      • 23.4. S_CROP
    • 24. The Silicon Labs Si470x FM Radio Receivers driver
      • 24.1. Information from Silicon Labs
      • 24.2. Supported ICs
      • 24.3. Supported USB devices
      • 24.4. Software
      • 24.5. Audio Listing
      • 24.6. Module Parameters
      • 24.7. Errors
      • 24.8. Open Issues
      • 24.9. Other useful information and links
    • 25. The Silicon Labs Si4713 FM Radio Transmitter Driver
      • 25.1. Information about the Device
      • 25.2. Device driver description
      • 25.3. Properties description
      • 25.4. RNL
      • 25.5. Stereo/Mono and RDS subchannels
      • 25.6. Testing
    • 26. The SI476x Driver
      • 26.1. TODO for the driver
      • 26.2. Parameters exposed over debugfs
    • 27. The Soc-Camera Drivers
      • 27.1. Terminology
      • 27.2. Purpose of the soc-camera subsystem
      • 27.3. Existing drivers
      • 27.4. Camera host API
      • 27.5. Camera API
      • 27.6. VIDIOC_S_CROP and VIDIOC_S_FMT behaviour
      • 27.7. Format conversion
    • 28. The Linux USB Video Class (UVC) driver
      • 28.1. Extension Unit (XU) support
        • 28.1.1. Introduction
        • 28.1.2. Control mappings
        • 28.1.3. Security
        • 28.1.4. Debugging
        • 28.1.5. IOCTL reference
    • 29. The Virtual Video Test Driver (vivid)
      • 29.1. Configuring the driver
      • 29.2. Video Capture
        • 29.2.1. Webcam Input
        • 29.2.2. TV and S-Video Inputs
        • 29.2.3. HDMI Input
      • 29.3. Video Output
        • 29.3.1. S-Video Output
        • 29.3.2. HDMI Output
      • 29.4. VBI Capture
      • 29.5. VBI Output
      • 29.6. Radio Receiver
      • 29.7. Radio Transmitter
      • 29.8. Software Defined Radio Receiver
      • 29.9. Controls
        • 29.9.1. User Controls - Test Controls
        • 29.9.2. User Controls - Video Capture
        • 29.9.3. User Controls - Audio
        • 29.9.4. Vivid Controls
        • 29.9.5. Digital Video Controls
        • 29.9.6. FM Radio Receiver Controls
        • 29.9.7. FM Radio Modulator Controls
      • 29.10. Video, VBI and RDS Looping
        • 29.10.1. Video and Sliced VBI looping
        • 29.10.2. Radio & RDS Looping
      • 29.11. Cropping, Composing, Scaling
      • 29.12. Formats
      • 29.13. Capture Overlay
      • 29.14. Output Overlay
      • 29.15. CEC (Consumer Electronics Control)
      • 29.16. Some Future Improvements
    • 30. The Zoran driver
      • 30.1. Frequently Asked Questions
      • 30.2. What cards are supported
        • 30.2.1. Iomega Buz
        • 30.2.2. AverMedia 6 Eyes AVS6EYES
        • 30.2.3. Linux Media Labs LML33
        • 30.2.4. Linux Media Labs LML33R10
        • 30.2.5. Pinnacle/Miro DC10(new)
        • 30.2.6. Pinnacle/Miro DC10+
        • 30.2.7. Pinnacle/Miro DC10(old)
        • 30.2.8. Pinnacle/Miro DC30
        • 30.2.9. Pinnacle/Miro DC30+
      • 30.3. 1.1 What the TV decoder can do an what not
        • 30.3.1. Philips saa7111 TV decoder
        • 30.3.2. Philips saa7110a TV decoder
        • 30.3.3. Philips saa7114 TV decoder
        • 30.3.4. Brooktree bt819 TV decoder
        • 30.3.5. Micronas vpx3220a TV decoder
        • 30.3.6. Samsung ks0127 TV decoder
      • 30.4. What the TV encoder can do an what not
        • 30.4.1. Philips saa7185 TV Encoder
        • 30.4.2. Brooktree bt856 TV Encoder
        • 30.4.3. Analog Devices adv7170 TV Encoder
        • 30.4.4. Analog Devices adv7175 TV Encoder
        • 30.4.5. ITT mse3000 TV encoder
        • 30.4.6. Conexant bt866 TV encoder
      • 30.5. How do I get this damn thing to work
      • 30.6. What mainboard should I use (or why doesn’t my card work)
      • 30.7. Programming interface
      • 30.8. Applications
      • 30.9. Concerning buffer sizes, quality, output size etc.
      • 30.10. It hangs/crashes/fails/whatevers! Help!
      • 30.11. Maintainers/Contacting
      • 30.12. Driver’s License
    • 31. Zoran 364xx based USB webcam module
      • 31.1. Introduction
      • 31.2. Install
      • 31.3. Usage
      • 31.4. links
      • 31.5. Supported devices
  • Linux GPU Driver Developer’s Guide
    • Introduction
      • Style Guidelines
    • DRM Internals
      • Driver Initialization
        • Driver Information
        • Device Instance and Driver Handling
        • Driver Load
        • Bus-specific Device Registration and PCI Support
      • Open/Close, File Operations and IOCTLs
        • Open and Close
        • File Operations
        • IOCTLs
      • Legacy Support Code
        • Legacy Suspend/Resume
        • Legacy DMA Services
    • DRM Memory Management
      • The Translation Table Manager (TTM)
        • TTM initialization
      • The Graphics Execution Manager (GEM)
        • GEM Initialization
        • GEM Objects Creation
        • GEM Objects Lifetime
        • GEM Objects Naming
        • GEM Objects Mapping
        • Memory Coherency
        • Command Execution
      • GEM Function Reference
      • VMA Offset Manager
      • PRIME Buffer Sharing
        • Overview and Driver Interface
        • PRIME Helper Functions
      • PRIME Function References
      • DRM MM Range Allocator
        • Overview
        • LRU Scan/Eviction Support
      • DRM MM Range Allocator Function References
      • CMA Helper Functions Reference
    • Kernel Mode Setting (KMS)
      • Mode Setting
        • Display Modes Function Reference
        • Atomic Mode Setting Function Reference
        • Frame Buffer Abstraction
        • DRM Format Handling
        • Dumb Buffer Objects
        • Output Polling
      • KMS Initialization and Cleanup
        • CRTCs (struct drm_crtc)
        • Planes (struct drm_plane)
        • Encoders (struct drm_encoder)
        • Connectors (struct drm_connector)
        • Cleanup
        • Output discovery and initialization example
        • KMS API Functions
        • KMS Data Structures
        • KMS Locking
      • KMS Properties
        • Existing KMS Properties
      • Vertical Blanking
        • Vertical Blanking and Interrupt Handling Functions Reference
    • Mode Setting Helper Functions
      • Atomic Modeset Helper Functions Reference
        • Overview
        • Implementing Asynchronous Atomic Commit
        • Atomic State Reset and Initialization
      • Modeset Helper Reference for Common Vtables
      • Legacy CRTC/Modeset Helper Functions Reference
      • Output Probing Helper Functions Reference
      • fbdev Helper Functions Reference
      • Framebuffer CMA Helper Functions Reference
      • Display Port Helper Functions Reference
      • Display Port Dual Mode Adaptor Helper Functions Reference
      • Display Port MST Helper Functions Reference
      • MIPI DSI Helper Functions Reference
      • EDID Helper Functions Reference
      • Rectangle Utilities Reference
      • Flip-work Helper Reference
      • HDMI Infoframes Helper Reference
      • Plane Helper Reference
        • Tile group
      • Bridges
        • Overview
        • Default bridge callback sequence
      • Panel Helper Reference
      • Simple KMS Helper Reference
    • Userland interfaces
      • libdrm Device Lookup
      • Primary Nodes, DRM Master and Authentication
      • Render nodes
      • VBlank event handling
    • drm/i915 Intel GFX Driver
      • Core Driver Infrastructure
        • Runtime Power Management
        • Interrupt Handling
        • Intel GVT-g Guest Support(vGPU)
      • Display Hardware Handling
        • Mode Setting Infrastructure
        • Frontbuffer Tracking
        • Display FIFO Underrun Reporting
        • Plane Configuration
        • Atomic Plane Helpers
        • Output Probing
        • Hotplug
        • High Definition Audio
        • Panel Self Refresh PSR (PSR/SRD)
        • Frame Buffer Compression (FBC)
        • Display Refresh Rate Switching (DRRS)
        • DPIO
        • CSR firmware support for DMC
        • Video BIOS Table (VBT)
      • Memory Management and Command Submission
        • Batchbuffer Parsing
        • Batchbuffer Pools
        • Logical Rings, Logical Ring Contexts and Execlists
        • Global GTT views
        • GTT Fences and Swizzling
        • Object Tiling IOCTLs
        • Buffer Object Eviction
        • Buffer Object Memory Shrinking
      • GuC
        • GuC-specific firmware loader
        • GuC-based command submission
        • GuC Firmware Layout
      • Tracing
        • i915_ppgtt_create and i915_ppgtt_release
        • i915_context_create and i915_context_free
        • switch_mm
    • VGA Switcheroo
      • Modes of Use
        • Manual switching and manual power control
        • Driver power control
      • API
        • Public functions
        • Public structures
        • Public constants
        • Private structures
      • Handlers
        • apple-gmux Handler
 
The Linux Kernel
  • Docs »
  • Linux Media Infrastructure userspace API »
  • Part IV - Media Controller API »
  • 4. Function Reference
  • View page source

4. Function ReferenceΒΆ

  • 4.1. media open()
  • 4.2. media close()
  • 4.3. media ioctl()
  • 4.4. ioctl MEDIA_IOC_DEVICE_INFO
  • 4.5. ioctl MEDIA_IOC_G_TOPOLOGY
  • 4.6. ioctl MEDIA_IOC_ENUM_ENTITIES
  • 4.7. ioctl MEDIA_IOC_ENUM_LINKS
  • 4.8. ioctl MEDIA_IOC_SETUP_LINK
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