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: Apls TSCH5 NTSC
ALPS_TSBH1: Apls TSBH1 NTSC
TIVISION_TVF5533: Tivision TVF5533-MF NTSC

HISTORY

The bktr driver first appeared in FreeBSD 2.2.

AUTHORS

The bktr driver is based on the work of Jim Lowe <james@miller.cs.uwm.edu>, Mark Tinguely <tinguely@plains.nodak.edu>, Amancio Hasty <hasty@star-gate.com>, Roger Hardiman <roger@FreeBSD.org> 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.