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| − | = Introduction =
| + | #REDIRECT [[CM-iGLX: Linux: Video Input Port]] |
| − | CM-iGLX has Video Input Port (VIP in short) integrated into Geode LX processor. The VIP receives data from video decoder (for instance SAA7113h assembled on the SB-iGLX) and this data can be stored as a video stream or presented as a display overlay. This functionality can be enabled in using [http://v4l2spec.bytesex.org/ "Video for Linux 2 (v4l2)" API].
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| − | CompuLab provides [http://www.compulab.co.il/mediawiki/files/Linux/iglx/geodelx-v4l2.tar.gz geodelx-v4l2 package] which contains a driver that implements the v4l2 API on CM-iGLX ({{filename|geodelx-v4l2/geode_lx_video.patch}}) and application examples for video capture ({{filename|geodelx-v4l2/examples/capture.c}}) and video overlay ({{filename|geodelx-v4l2/examples/overlay.c}}).
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| − | | |
| − | = Kernel configuration =
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| − | The v4l2 driver for CM-iGLX included in the [http://www.compulab.co.il/mediawiki/files/Linux/iglx/geodelx-v4l2.tar.gz geodelx-v4l2 package] is available as a patch vs. [http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.24.tar.bz2 Linux kernel 2.6.24]. After applying the patch to kernel source tree you will need to enable the [[#Geode LX framebuffer driver]] and
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| − | [[#Geode LX v4l2 driver]]. After updating kernel configuration as described below, build the kernel and install the resulting image and loadable kernel modules to CM-iGLX. | |
| − | | |
| − | == Geode LX framebuffer driver ==
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| − | | |
| − | In the '''"Device Drivers -> Graphics support"''' menu enable '''"Support for frame buffer devices"''':
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| − | | |
| − | <pre>
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| − | .config - Linux Kernel v2.6.24 Configuration
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| − | ──────────────────────────────────────────────────────────────────────────────
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| − | ┌─────────────────────────── Graphics support ────────────────────────────┐
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| − | │ Arrow keys navigate the menu. <Enter> selects submenus --->. │
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| − | │ Highlighted letters are hotkeys. Pressing <Y> includes, <N> excludes, │
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| − | │ <M> modularizes features. Press <Esc><Esc> to exit, <?> for Help, </> │
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| − | │ for Search. Legend: [*] built-in [ ] excluded <M> module < > │
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| − | │ ┌─────────────────────────────────────────────────────────────────────┐ │
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| − | │ │ < > /dev/agpgart (AGP Support) ---> │ │
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| − | │ │ < > Direct Rendering Manager (XFree86 4.1.0 and higher DRI suppor│ │
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| − | │ │ < > Lowlevel video output switch controls │ │
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| − | │ │ <*> Support for frame buffer devices ---> │ │
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| − | │ │ [ ] Backlight & LCD device support ---> │ │
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| − | │ │ Display device support ---> │ │
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| − | │ │ Console display driver support ---> │ │
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| − | │ │ [ ] Bootup logo ---> │ │
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| − | │ └─────────────────────────────────────────────────────────────────────┘ │
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| − | ├─────────────────────────────────────────────────────────────────────────┤
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| − | │ <Select> < Exit > < Help > │
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| − | └─────────────────────────────────────────────────────────────────────────┘
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| − | </pre>
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| − | | |
| − | and in the '''"Support for frame buffer devices"''' menu enable '''"AMD Geode family framebuffer support"''' and '''"AMD Geode LX framebuffer support"''':
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| − | | |
| − | <pre>
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| − | .config - Linux Kernel v2.6.24 Configuration
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| − | ──────────────────────────────────────────────────────────────────────────────
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| − | ┌─────────────────── Support for frame buffer devices ────────────────────┐
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| − | │ Arrow keys navigate the menu. <Enter> selects submenus --->. │
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| − | │ Highlighted letters are hotkeys. Pressing <Y> includes, <N> excludes, │
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| − | │ <M> modularizes features. Press <Esc><Esc> to exit, <?> for Help, </> │
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| − | │ for Search. Legend: [*] built-in [ ] excluded <M> module < > │
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| − | │ ┌─────────────────────────────────────────────────────────────────────┐ │
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| − | │ │ --- Support for frame buffer devices │ │
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| − | │ │ [ ] Enable firmware EDID │ │
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| − | │ │ [ ] Enable Video Mode Handling Helpers │ │
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| − | │ │ [ ] Enable Tile Blitting Support │ │
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| − | │ │ *** Frame buffer hardware drivers *** │ │
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| − | │ │ < > Cirrus Logic support │ │
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| − | │ │ < > Permedia2 support │ │
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| − | │ │ < > CyberPro 2000/2010/5000 support │ │
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| − | │ │ < > Arc Monochrome LCD board support │ │
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| − | .............
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| − | │ │ < > 3Dfx Voodoo Graphics (sst1) support │ │
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| − | │ │ < > VIA VT8623 support │ │
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| − | │ │ < > Cyberblade/i1 support │ │
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| − | │ │ < > Trident support │ │
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| − | │ │ < > ARK 2000PV support │ │
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| − | │ │ < > Permedia3 support (EXPERIMENTAL) │ │
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| − | │ │ [*] AMD Geode family framebuffer support (EXPERIMENTAL) │ │
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| − | │ │ <*> AMD Geode LX framebuffer support (EXPERIMENTAL) │ │
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| − | │ │ < > AMD Geode GX framebuffer support (EXPERIMENTAL) │ │
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| − | │ │ < > AMD Geode GX1 framebuffer support (EXPERIMENTAL) │ │
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| − | │ │ < > Virtual Frame Buffer support (ONLY FOR TESTING!) │ │
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| − | │ └─────────────────────────────────────────────────────────────────────┘ │
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| − | ├─────────────────────────────────────────────────────────────────────────┤
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| − | │ <Select> < Exit > < Help > │
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| − | └─────────────────────────────────────────────────────────────────────────┘
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| − | </pre>
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| − | | |
| − | == Geode LX v4l2 driver ==
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| − | In the '''"Device Drivers -> Multimedia devices"''' menu enable '''"Video for Linux"''':
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| − | | |
| − | <pre>
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| − | .config - Linux Kernel v2.6.24 Configuration
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| − | ──────────────────────────────────────────────────────────────────────────────
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| − | ┌────────────────────────── Multimedia devices ───────────────────────────┐
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| − | │ Arrow keys navigate the menu. <Enter> selects submenus --->. │
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| − | │ Highlighted letters are hotkeys. Pressing <Y> includes, <N> excludes, │
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| − | │ <M> modularizes features. Press <Esc><Esc> to exit, <?> for Help, </> │
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| − | │ for Search. Legend: [*] built-in [ ] excluded <M> module < > │
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| − | │ ┌─────────────────────────────────────────────────────────────────────┐ │
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| − | │ │ <M> Video For Linux │ │
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| − | │ │ [ ] Enable Video For Linux API 1 (DEPRECATED) │ │
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| − | │ │ [*] Enable Video For Linux API 1 compatible Layer │ │
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| − | │ │ [*] Video capture adapters ---> │ │
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| − | │ │ [ ] Radio Adapters ---> │ │
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| − | │ │ < > DVB for Linux │ │
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| − | │ │ [ ] DAB adapters │ │
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| − | │ │ │ │
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| − | │ │ │ │
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| − | │ │ │ │
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| − | │ └─────────────────────────────────────────────────────────────────────┘ │
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| − | ├─────────────────────────────────────────────────────────────────────────┤
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| − | │ <Select> < Exit > < Help > │
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| − | └─────────────────────────────────────────────────────────────────────────┘
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| − | </pre>
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| − | | |
| − | Next, go to '''"Video capture adapters"''' menu and enable '''"Geode LX Video capture interface"''':
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| − | | |
| − | <pre>
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| − | .config - Linux Kernel v2.6.24 Configuration
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| − | ──────────────────────────────────────────────────────────────────────────────
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| − | ┌──────────────────────── Video capture adapters ─────────────────────────┐
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| − | │ Arrow keys navigate the menu. <Enter> selects submenus --->. │
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| − | │ Highlighted letters are hotkeys. Pressing <Y> includes, <N> excludes, │
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| − | │ <M> modularizes features. Press <Esc><Esc> to exit, <?> for Help, </> │
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| − | │ for Search. Legend: [*] built-in [ ] excluded <M> module < > │
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| − | │ ┌─────────────────────────────────────────────────────────────────────┐ │
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| − | │ │ --- Video capture adapters │ │
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| − | │ │ [ ] Enable advanced debug functionality │ │
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| − | │ │ [ ] Autoselect pertinent encoders/decoders and other helper chi│ │
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| − | │ │ Encoders/decoders and other helper chips ---> │ │
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| − | │ │ < > Virtual Video Driver │ │
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| − | │ │ < > SAA5246A, SAA5281 Teletext processor │ │
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| − | │ │ < > SAA5249 Teletext processor │ │
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| − | │ │ < > Philips SAA7134 support │ │
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| − | │ │ < > Hexium HV-PCI6 and Orion frame grabber │ │
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| − | │ │ < > Hexium Gemini frame grabber │ │
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| − | │ │ < > Conexant 2388x (bt878 successor) support │ │
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| − | │ │ <M> Geode LX Video capture interface ---> │ │
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| − | │ │ < > Marvell 88ALP01 (Cafe) CMOS Camera Controller support │ │
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| − | │ │ [ ] V4L USB devices ---> │ │
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| − | │ └─────────────────────────────────────────────────────────────────────┘ │
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| − | ├─────────────────────────────────────────────────────────────────────────┤
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| − | │ <Select> < Exit > < Help > │
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| − | └─────────────────────────────────────────────────────────────────────────┘
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| − | </pre>
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| − | | |
| − | If you are using SB-iGLX base board disable '''"Autoselect pertinent encoders/decoders and other helper chips"''' option and select SAA7113 video decoder:
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| − | | |
| − | <pre>
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| − | .config - Linux Kernel v2.6.24 Configuration
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| − | ──────────────────────────────────────────────────────────────────────────────
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| − | ┌─────────────── Encoders/decoders and other helper chips ────────────────┐
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| − | │ Arrow keys navigate the menu. <Enter> selects submenus --->. │
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| − | │ Highlighted letters are hotkeys. Pressing <Y> includes, <N> excludes, │
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| − | │ <M> modularizes features. Press <Esc><Esc> to exit, <?> for Help, </> │
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| − | │ for Search. Legend: [*] built-in [ ] excluded <M> module < > │
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| − | │ ┌─────────────────────────────────────────────────────────────────────┐ │
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| − | │ │ *** Audio decoders *** │ │
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| − | │ │ < > Philips TDA9840 audio processor │ │
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| − | │ │ < > Philips TEA6415C audio processor │ │
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| − | │ │ < > Philips TEA6420 audio processor │ │
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| − | │ │ < > Micronas MSP34xx audio decoders │ │
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| − | │ │ < > Cirrus Logic CS53L32A audio ADC │ │
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| − | │ │ < > Texas Instruments TLV320AIC23B audio codec │ │
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| − | │ │ < > Wolfson Microelectronics WM8775 audio ADC with input mixer │ │
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| − | │ │ < > Wolfson Microelectronics WM8739 stereo audio ADC │ │
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| − | │ │ < > Panasonic VP27s internal MPX │ │
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| − | │ │ *** Video decoders *** │ │
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| − | │ │ < > OmniVision OV7670 sensor support │ │
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| − | │ │ < > TCM825x camera sensor support │ │
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| − | │ │ <M> Philips SAA7113/4/5 video decoders │ │
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| − | │ │ < > Texas Instruments TVP5150 video decoder │ │
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| − | │ │ *** Video and audio decoders *** │ │
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| − | │ │ < > Conexant CX2584x audio/video decoders │ │
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| − | │ │ *** MPEG video encoders *** │ │
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| − | │ │ < > Conexant CX2341x MPEG encoders │ │
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| − | │ │ *** Video encoders *** │ │
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| − | │ │ < > Philips SAA7127/9 digital video encoders │ │
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| − | │ │ *** Video improvement chips *** │ │
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| − | │ │ < > NEC Electronics uPD64031A Ghost Reduction │ │
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| − | │ │ < > NEC Electronics uPD64083 3-Dimensional Y/C separation │ │
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| − | │ └─────────────────────────────────────────────────────────────────────┘ │
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| − | ├─────────────────────────────────────────────────────────────────────────┤
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| − | │ <Select> < Exit > < Help > │
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| − | └─────────────────────────────────────────────────────────────────────────┘
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| − | </pre>
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| − | | |
| − | = Application examples =
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| − | | |
| − | The [http://www.compulab.co.il/mediawiki/files/Linux/iglx/geodelx-v4l2.tar.gz geodelx-v4l2 package] includes two simple examples for video capture and video overlay.
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| − | == Capture ==
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| − | The capture example accepts the following command line options:
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| − | <pre>
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| − | -d | --device name Video device name [/dev/video]
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| − | -h | --help Print this message
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| − | -m | --mmap Use memory mapped buffers
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| − | -r | --read Use read() calls
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| − | -o | --output Capture to file [file]
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| − | </pre>
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| − | | |
| − | == Overlay ==
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| − | The overlay example accepts the following command line options:
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| − | | |
| − | <pre>
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| − | -d | --device name Video device name [/dev/video]
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| − | -w | --width value Overlay window width [640]
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| − | -e | --height value Overlay window height [480]
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| − | -l | --left value Overlay window left coord [0]
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| − | -t | --top value Overlay window top coord [0]
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| − | -s | --steps value Steps for control adjustment []
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| − | -v | --verbose Verbose output
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| − | -h | --help Print this message
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| − | </pre>
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