Reference

bktr(4)

Brooktree Bt848/849/878/879 PCI TV tuners and video capture boards

NAME

bktr – Brooktree Bt848/849/878/879 PCI TV tuners and video capture boards

SYNOPSIS

bktr* at pci? radio* at bktr?

#include <dev/ic/bt8xx.h>

option BKTR_ALLOC_PAGES=nnn option BKTR_SYSTEM_DEFAULT=XXX option BKTR_OVERRIDE_CARD=nnn option BKTR_OVERRIDE_MSP=n option BKTR_OVERRIDE_TUNER=nnn

DESCRIPTION

The bktr driver provides support for PCI video capture and VBI capture on low cost, high performance boards. This should support most video cards based on the Brooktree Bt848/849/878/879 Video Capture Chip. The driver also supports FM Radio if the Tuner supports it.

Specifically, the following cards are known to work:

Animation Technologies FlyVideo
AOpen VA1000
Askey/Dynalink Magic TView
ATI TV-Wonder and Wonder/VE
AverMedia cards
Hauppauge Wincast TV and WinTV/PCI
IMS TV Turbo
Intel Smart Video Recorder III
I/O DATA GV-BCTV2/PCI
I/O DATA GV-BCTV3/PCI
KISS TV/FM PCI
Leadtek Winfast TV 2000
Leadtek Winfast TV 2000 XP
Miro PC TV
MMAC Osprey
NEC PK-UG-X017
STB TV PCI Television Tuner
Terratec TerraTVplus
Video Highway XTreme
VideoLogic Captivator PCI
Zoltrix TV and Genie TV/FM

The driver currently supports the following features:

PCI to PCI DMA transfer
clipping
yuv
rgb16
rgb24
rgb32

On these cards, tuners and other components are interconnected with an I2C bus. The Brooktree848 chips act as a master device on the bus to control them.

VIDEO CAPTURE INTERFACE

The video capture interface to bktr is accessed through /dev/bktrN devices. The following ioctl(2) commands are supported on the Brooktree848 video capture interface:

METEORSFMT unsigned long *

This command sets the video format, also sometimes referred to as the video norm. The supported formats are:

METEOR_FMT_NTSC

NTSC

METEOR_FMT_PAL

PAL

METEOR_FMT_SECAM

SECAM

METEOR_FMT_AUTOMODE

hardware default

METEORGFMT unsigned long *

This command retrieves the current video format to the unsigned long * argument.

METEORSETGEO struct meteor_geomet *

This command sets the video properties that affect the bit size of a frame through the meteor_geomet * argument.

struct meteor_geomet {
	u_short		rows;	 /* height in pixels*/
	u_short		columns; /* width in pixels */
	u_short		frames;
	u_long		oformat;
}

The frames field is the number of frames to buffer. Currently only 1 frame is supported for most operations.

The oformat field is a bit-field describing the output pixel format type and which video fields to capture. The following are supported pixel format types:

METEOR_GEO_RGB16

16-bit RGB

METEOR_GEO_RGB24

24-bit RGB in 32 bits

METEOR_GEO_YUV_PACKED

16-bit 4:2:2 YUV

METEOR_GEO_YUV_PLANAR

16-bit 4:2:2 YUV

METEOR_GEO_YUV_UNSIGNED

unsigned UV

METEOR_GEO_YUV_422
METEOR_GEO_YUV_12
METEOR_GEO_YUV_9

The following are supported field capture modes:

METEOR_GEO_ODD_ONLY

only odd fields

METEOR_GEO_EVEN_ONLY

only even fields

By default, frames will consist of both the odd and even fields.

METEORGSUPPIXFMT struct meteor_pixfmt *

This command is used iteratively to fetch descriptions of supported output pixel formats into the meteor_pixfmt * argument.

struct meteor_pixfmt {
	u_int          index;
	METEOR_PIXTYPE type;
	u_int          Bpp;		/* bytes per pixel */
	u_long         masks[3];	/* YUV bit masks */
	unsigned       swap_bytes :1;
	unsigned       swap_shorts:1;
};

To query all the supported formats, start with an index field of 0 and continue with successive encodings (1, 2, ...) until the command returns an error.

METEORSACTPIXFMT int *

This command sets the active pixel format. The int * argument is the index of the pixel format as returned by METEORGSUPPIXFMT.

METEORGACTPIXFMT int *

This command fetches the active pixel format index into the int * argument.

METEORSINPUT unsigned long *

This command sets the input port of the Brooktree848 device. The following are supported input ports:

METEOR_INPUT_DEV0

composite (RCA)

METEOR_INPUT_DEV1

tuner

METEOR_INPUT_DEV2

composite S-video

METEOR_INPUT_DEV3

mystery device

METEOR_INPUT_DEV_RGB

rgb meteor

METEOR_INPUT_DEV_SVIDEO

S-Video

Not all devices built with Brooktree848 chips support the full list of input ports.

METEORGINPUT unsigned long *

This command retrieves the current input port to the unsigned long * argument.

METEORSFPS unsigned short *

This command sets the number of frames to grab each second. Valid frame rates are integers from 0 to 30.

METEORGFPS unsigned short *

This command fetches the number of frames to grab each second into the unsigned short * argument.

METEORCAPTUR int *

This command controls capturing of video data. The following are valid arguments:

METEOR_CAP_SINGLE

capture one frame

METEOR_CAP_CONTINOUS

continuously capture

METEOR_CAP_STOP_CONT

stop continuous capture

METEORSSIGNAL unsigned int *

This command controls the signal emission properties of bktr. If the unsigned int * argument is a valid signal, then that signal will be emitted when either a frame or field capture has completed. To select between frame or field signalling, the following arguments are used:

METEOR_SIG_FRAME

signal every frame

METEOR_SIG_FIELD

signal every field

By default, signals will be generated for every frame. Generation of signals is terminated with the METEOR_SIG_MODE_MASK argument.

TUNER INTERFACE

Most cards supported by this driver feature a hardware television tuner on the I2C bus. The tuner interface to bktr is accessed through /dev/tunerN devices. The following ioctl(2) commands are supported on the tuner interface:

TVTUNER_SETTYPE unsigned int *

This command sets the tuner's TV channel set, also sometimes called the TV channel band. This setting is used to calculate the proper tuning frequencies. The desired channel set must be selected before attempting to set the tuner channel or frequency. The following is a list of valid channel sets:

CHNLSET_NABCST

North America broadcast

CHNLSET_CABLEIRC

North America IRC cable

CHNLSET_CABLEHRC

North America HRC cable

CHNLSET_WEUROPE

Western Europe

CHNLSET_JPNBCST

Japan broadcast

CHNLSET_JPNCABLE

Japan cable

CHNLSET_XUSSR

Russia

CHNLSET_AUSTRALIA

Australia

CHNLSET_FRANCE

France

TVTUNER_GETTYPE unsigned int *

This command fetches the tuner's current channel set to the unsigned int * argument.

TVTUNER_SETCHNL unsigned int *

This command sets the tuner's frequency to a specified channel in the current channel set.

TVTUNER_GETCHNL unsigned int *

This command fetches the last selected channel. Note that it is not necessarily the current channel. In particular, changing the tuner's frequency by a command other than TVTUNER_SETCHNL will not update this setting, and it defaults to 0 on driver initialization.

TVTUNER_SETFREQ unsigned int *

This command sets the tuner's frequency to 1/16th the value of the unsigned int * argument, in MHz. Note that the current channelset is used to determine frequency offsets when this command is executed.

TVTUNER_GETFREQ unsigned int *

This command fetches the tuner's current frequency to the unsigned int * argument. Note that this value is 16 times the actual tuner frequency, in MHz.

BT848_SAUDIO int *

This command controls the audio input port and mute state. The following is a list of valid arguments:

AUDIO_TUNER

tuner audio port

AUDIO_EXTERN

external audio port

AUDIO_INTERN

internal audio port

AUDIO_MUTE

mute audio

AUDIO_UNMUTE

unmute audio

BT848_GAUDIO int *

This command fetches the audio input and mute state bits to the int * argument.

KERNEL OPTIONS

The following kernel configuration options are available:

option BKTR_ALLOC_PAGES=nnn

Specifies the number of contiguous pages to allocate when successfully probed. The default number of pages allocated by the kernel is 216. This means that there are (216*4096) bytes available for use.

option BKTR_SYSTEM_DEFAULT="(BROOKTREE_PAL | BROOKTREE_NTSC)"

One of these options can be used to set the default video format for the driver. This fixed random hangs and lockups with the VideoLogic Captivator PCI card.

option BKTR_OVERRIDE_CARD=nnn

Select a specific card (overrides autodetection). `nnn' is set to one of the names listed and explained below.

CARD_ASKEY_DYNALINK_MAGIC_TVIEW

Askey/Dynalink Magic TView

CARD_AVER_MEDIA

AverMedia

CARD_FLYVIDEO

Animation Technologies FlyVideo

CARD_AOPEN_VA1000

AOpen VA1000

CARD_TVWONDER

ATI TV-Wonder/VE

CARD_HAUPPAUGE

Hauppauge Wincast TV and WinTV

CARD_IMS_TURBO

IMS TV Turbo

CARD_INTEL

Intel Smart Video Recorder III

CARD_IO_GV

I/O DATA GV-BCTV2/PCI

CARD_IO_BCTV3

I/O DATA GV-BCTV3/PCI

CARD_KISS

KISS TV/FM PCI

CARD_LEADTEK

Leadtek Winfast TV 2000

CARD_LEADTEK_XP

Leadtek Winfast TV 2000 XP

CARD_MIRO

Miro PC TV

CARD_OSPREY

MMAC Osprey

CARD_NEC_PK

NEC PK-UG-X017

CARD_STB

STB TV PCI Television Tuner

CARD_TERRATVPLUS

Terratec TerraTVplus

CARD_VIDEO_HIGHWAY_XTREME

Video Highway XTreme

CARD_ZOLTRIX

Zoltrix TV

CARD_ZOLTRIX_GENIE_FM

Zoltrix Genie TV/FM

option BKTR_OVERRIDE_MSP=n

Specifies whether the MSP3400C chip is present (overrides autodetection).

option BKTR_OVERRIDE_TUNER=nnn

Select a specific tuner (overrides autodetection). `nnn' is set to one of the names listed and explained below.

TEMIC_NTSC

Temic 4032FY5

TEMIC_PAL

Temic 4002FH5

TEMIC_SECAM

Temic 4002FN5

PHILIPS_NTSC

Philips FI1236

PHILIPS_PAL

Philips FM1216

PHILIPS_SECAM

Philips FI1216MF

TEMIC_PALI

Temic 4062FY5

PHILIPS_PALI

Philips FI1246

PHILIPS_FR1236_NTSC

Philips FR1236 MK2

PHILIPS_FR1216_PAL

Philips FM1216

PHILIPS_FR1236_SECAM

Philips FM1216MF

ALPS_TSCH5

Alps TSCH5 NTSC

ALPS_TSBH1

Alps TSBH1 NTSC

TIVISION_TVF5533

Tivision TVF5533-MF NTSC

SEE ALSO

intro(4), pci(4), radio(4)

HISTORY

The bktr driver first appeared in FreeBSD 2.2.

AUTHORS

The bktr driver is based on the work of Jim Lowe ⟨[email protected]⟩, Mark Tinguely ⟨[email protected]⟩, Amancio Hasty ⟨[email protected]⟩, Roger Hardiman ⟨[email protected]⟩ and a bunch of other people.

CAVEATS

On big-endian architectures it is not possible to program the card to perform proper byte swapping in 24 bit modes, therefore only 16 and 32 bit modes are supported.

History