1985adcd41
submitted ioctl to clear the video buffer
prior to starting video capture
Amancio : clean up yuv12 so that it does not
affect rgb capture. Basically, fxtv after
capturing in yuv12 mode , switching to rgb
would cause the video capture to be too bright.
1.32 disable inverse gamma function for rgb and yuv
capture. fixed meteor brightness ioctl it now
converts the brightness value from unsigned to
signed.
1.33 added sysctl: hw.bt848.tuner, hw.bt848.reverse_mute,
hw.bt848.card
card takes a value from 0 to bt848_max_card
tuner takes a value from 0 to bt848_max_tuner
reverse_mute : 0 no effect, 1 reverse tuner
mute function some tuners are wired reversed :(
86 lines
2.9 KiB
Plaintext
86 lines
2.9 KiB
Plaintext
-------------------------------------------------------------------------------
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Recent versions of 3.0-current have the bktr driver built in. Older versions
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of 3.0 and all versions of 2.2 need to have the driver files installed by hand:
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cp ioctl_bt848.h /sys/i386/include/
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cp brktree_reg.h brooktree848.c /sys/pci/
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In /sys/conf/files add:
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pci/brooktree848.c optional bktr device-driver
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-------------------------------------------------------------------------------
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In all cases you will need to add the driver to your kernel:
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In your kernel configuration file:
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controller pci0 #if you already have this line don't add it.
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device bktr0
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There is no need to specify DMA channels nor interrupts for this
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driver.
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-------------------------------------------------------------------------------
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Finally you need to create nodes for the driver:
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Create a video device:
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mknod /dev/bktr0 c 92 0
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Create a tuner device:
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mknod /dev/tuner0 c 92 16
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-------------------------------------------------------------------------------
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The code attempts to auto-probe code to detect card/tuner types.
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The detected card is printed in the dmesg as the driver is loaded. If
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this fails to detect the proper card you can override it in brooktree848.c:
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#define OVERRIDE_CARD <card type>
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where <card type> is one of:
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CARD_UNKNOWN
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CARD_MIRO
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CARD_HAUPPAUGE
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CARD_STB
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CARD_INTEL
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-------------------------------------------------------------------------------
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This model now separates the "tuner control" items into a minor device:
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minor device layout: xxxxxxxx xxxT UUUU
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UUUU: the card (ie UNIT) identifier, 0 thru 15
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T == 0: video device
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T == 1: tuner device
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Access your tuner ioctl thru your tuner device handle and anything
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which controls the video capture process thru the video device handle.
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Certain ioctl()s such as video source are available thru both devices.
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-------------------------------------------------------------------------------
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If your tuner does not work properly or is not recognized properly
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try setting the tuner type via or card type:
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sysctl -w hw.bt848.card=<integer> current valid values are 0 to 5 inclusive
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sysctl -w hw.bt848.tuner=<integer> where integer is a value from 1 to 10
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systcl -w hw.bt848.reverse_mute=<1 | 0> to reverse the mute function in the
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driver set variable to 1.
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The exact format of the sysctl bt848 variable is:
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unit << 8 | value
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unit identifies the pci bt848 board to be affected 0 is the first bt848
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board, 1 is the second bt848 board.
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value denotes the integer value for tuners is a value from 0 to 10 for
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reversing the mute function of the tuner the value is 1 or 0.
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to find out all the bt848 variables:
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sysctl hw.bt848
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-------------------------------------------------------------------------------
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The bt848 driver consists of:
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src/sys/i386/include/ioctl_bt848.h
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src/sys/pci/brktree_reg.h
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src/sys/pci/brooktree848.c
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