架构
基础
相机模组组成：
- 镜头 LENS
- 对焦马达 VCM
- 图像传感器 SENOSOR
- 图像信号处理器 ISP
按接口来划分，Camera 分为 DVP 、 MIPI、usb camera。
- DVP是并口，需要PCLK、VSYNC、HSYNC、D[0：11]——可以是8/10/12bit数据，看 ISP 或 baseband 是否支持；
- MIPI是LVDS，低压差分串口。只需要要CLKP/N、DATAP/N——最大支持4-lane，一般2-lane可以搞定。
- usb camera 相当于集 sensor、isp 驱动于一身的消息通，通过 usb 接口对外提供 YUV、MJpeg 等图像数据。
MIPI接口比DVP的接口信号线少，由于是低压差分信号，产生的干扰小，抗干扰能力也强。最重要的是 DVP 接口在信号完整性方面受限制，速率也受限制。500W还可以勉强用DVP，800W及以上都采用MIPI接口。 USB摄像头，即插即用比较灵活，但是由于传输速率的瓶颈，其支持分辨率较低。
App
frameworks/base/core/java/android/hardware/Camera.java
system/lib/libandroid_runtime.so
frameworks/base/core/jni/android_hardware_Camera.cpp
system/lib/libcamera_client.so
frameworks/av/camera/Camera.cpp
frameworks/av/camera/CameraBase.cpp
mediaserver
/system/bin/mediaserver
frameworks/av/media/mediaserver/main_mediaserver.cpp
system/lib/libcameraservice.so
frameworks/av/services/camera/libcameraservice/CameraService.cpp
HAL
system/lib/hw/camera.rk30board.so
hardware/rockchip/camera/CameraHal/
Driver
drivers/media/video
DTS
&cif_isp0 {
status = "okay";
};
HAL
Android：
`- hardware/rockchip/camera/
|- Config
| `- cam_board_rk3399.xml // 摄像头的参数设置
|- CameraHal // 摄像头的 HAL 源码
`- SiliconImage // ISP 库，包括所有支持模组的驱动源码
`- isi/drv/OV13850 // OV13850 模组的驱动源码
`- calib/OV13850.xml // OV13850 模组的调校参数
Kernel：
|- kernel/drivers/media/video/rk_camsys // CamSys 驱动源码
`- kernel/include/media/camsys_head.h
cam_board_rk3288.xml
<?xml version="1.0" ?>
<BoardFile>
<BoardXmlVersion version="v0.0xf.0">
</BoardXmlVersion>
<CamDevie>
<HardWareInfo>
<Sensor>
<SensorName name="OV8858"></SensorName>
<ModuleName name="NC" ></ModuleName>
<SensorLens name="LG-9569A2"></SensorLens>
<SensorDevID IDname="CAMSYS_DEVID_SENSOR_1B"></SensorDevID>
<SensorHostDevID busnum="CAMSYS_DEVID_MARVIN" ></SensorHostDevID>
<SensorI2cBusNum busnum="3"></SensorI2cBusNum>
<SensorI2cAddrByte byte="2"></SensorI2cAddrByte>
<SensorI2cRate rate="100000"></SensorI2cRate>
<SensorAvdd name="NC" min="0" max="0" delay="0"></SensorAvdd>
<SensorDvdd name="NC" min="0" max="0" delay="0"></SensorDvdd>
<SensorDovdd name="NC" min="18000000" max="18000000" delay="5000"></SensorDovdd>
<SensorMclk mclk="24000000" delay="1000"></SensorMclk>
<SensorGpioPwen ioname="RK30_PIN0_PC1" active="1" delay="1000"></SensorGpioPwen>
<SensorGpioRst ioname="NC" active="0" delay="1000"></SensorGpioRst>
<SensorGpioPwdn ioname="RK30_PIN2_PB6" active="0" delay="2000"></SensorGpioPwdn>
<SensorFacing facing="back"></SensorFacing>
<SensorInterface interface="MIPI"></SensorInterface>
<SensorMirrorFlip mirror="0"></SensorMirrorFlip>
<SensorOrientation orientation="0"></SensorOrientation>
<SensorPowerupSequence seq="1234"></SensorPowerupSequence>
<SensorFovParemeter h="60.0" v="60.0"></SensorFovParemeter>
<SensorAWB_Frame_Skip fps="15"></SensorAWB_Frame_Skip>
<SensorPhy phyMode="CamSys_Phy_Mipi" lane="2" phyIndex="1" sensorFmt="CamSys_Fmt_Raw_10b"></SensorPhy>
</Sensor>
<VCM>
<VCMDrvName name="BuiltInSensor"></VCMDrvName>
<VCMName name="NC"></VCMName>
<VCMI2cBusNum busnum="3"></VCMI2cBusNum>
<VCMI2cAddrByte byte="0"></VCMI2cAddrByte>
<VCMI2cRate rate="0"></VCMI2cRate>
<VCMVdd name="NC" min="0" max="0" delay="0"></VCMVdd>
<VCMGpioPower ioname="RK30_PIN8_PA6" active="1" delay="1000"></VCMGpioPower>
<VCMGpioPwdn ioname="NC" active="0" delay="0"></VCMGpioPwdn>
<VCMCurrent start="0" rated="100" vcmmax="100" stepmode="4" drivermax="100"></VCMCurrent>
</VCM>
<Flash>
<FlashName name="Internal"></FlashName>
<FlashI2cBusNum busnum="0"></FlashI2cBusNum>
<FlashI2cAddrByte byte="0"></FlashI2cAddrByte>
<FlashI2cRate rate="0"></FlashI2cRate>
<FlashTrigger ioname="NC" active="0"></FlashTrigger>
<FlashEn ioname="NC" active="0"></FlashEn>
<FlashModeType mode="1"></FlashModeType>
<FlashLuminance luminance="0"></FlashLuminance>
<FlashColorTemp colortemp="0"></FlashColorTemp>
</Flash>
</HardWareInfo>
<SoftWareInfo>
<AWB>
<AWB_Auto support="1"></AWB_Auto>
<AWB_Incandescent support="1"></AWB_Incandescent>
<AWB_Fluorescent support="1"></AWB_Fluorescent>
<AWB_Warm_Fluorescent support="1"></AWB_Warm_Fluorescent>
<AWB_Daylight support="1"></AWB_Daylight>
<AWB_Cloudy_Daylight support="1"></AWB_Cloudy_Daylight>
<AWB_Twilight support="1"></AWB_Twilight>
<AWB_Shade support="1"></AWB_Shade>
</AWB>
<Sence>
<Sence_Mode_Auto support="1"></Sence_Mode_Auto>
<Sence_Mode_Action support="1"></Sence_Mode_Action>
<Sence_Mode_Portrait support="1"></Sence_Mode_Portrait>
<Sence_Mode_Landscape support="1"></Sence_Mode_Landscape>
<Sence_Mode_Night support="1"></Sence_Mode_Night>
<Sence_Mode_Night_Portrait support="1"></Sence_Mode_Night_Portrait>
<Sence_Mode_Theatre support="1"></Sence_Mode_Theatre>
<Sence_Mode_Beach support="1"></Sence_Mode_Beach>
<Sence_Mode_Snow support="1"></Sence_Mode_Snow>
<Sence_Mode_Sunset support="1"></Sence_Mode_Sunset>
<Sence_Mode_Steayphoto support="1"></Sence_Mode_Steayphoto>
<Sence_Mode_Pireworks support="1"></Sence_Mode_Pireworks>
<Sence_Mode_Sports support="1"></Sence_Mode_Sports>
<Sence_Mode_Party support="1"></Sence_Mode_Party>
<Sence_Mode_Candlelight support="1"></Sence_Mode_Candlelight>
<Sence_Mode_Barcode support="1"></Sence_Mode_Barcode>
<Sence_Mode_HDR support="1"></Sence_Mode_HDR>
</Sence>
<Effect>
<Effect_None support="1"></Effect_None>
<Effect_Mono support="1"></Effect_Mono>
<Effect_Solarize support="1"></Effect_Solarize>
<Effect_Negative support="1"></Effect_Negative>
<Effect_Sepia support="1"></Effect_Sepia>
<Effect_Posterize support="1"></Effect_Posterize>
<Effect_Whiteboard support="1"></Effect_Whiteboard>
<Effect_Blackboard support="1"></Effect_Blackboard>
<Effect_Aqua support="1"></Effect_Aqua>
</Effect>
<FocusMode>
<Focus_Mode_Auto support="1"></Focus_Mode_Auto>
<Focus_Mode_Infinity support="1"></Focus_Mode_Infinity>
<Focus_Mode_Marco support="1"></Focus_Mode_Marco>
<Focus_Mode_Fixed support="1"></Focus_Mode_Fixed>
<Focus_Mode_Edof support="1"></Focus_Mode_Edof>
<Focus_Mode_Continuous_Video support="1"></Focus_Mode_Continuous_Video>
<Focus_Mode_Continuous_Picture support="1"></Focus_Mode_Continuous_Picture>
</FocusMode>
<FlashMode>
<Flash_Mode_Off support="1"></Flash_Mode_Off>
<Flash_Mode_On support="1"></Flash_Mode_On>
<Flash_Mode_Torch support="1"></Flash_Mode_Torch>
<Flash_Mode_Auto support="1"></Flash_Mode_Auto>
<Flash_Mode_Red_Eye support="1"></Flash_Mode_Red_Eye>
</FlashMode>
<AntiBanding>
<Anti_Banding_Auto support="1"></Anti_Banding_Auto>
<Anti_Banding_50HZ support="1"></Anti_Banding_50HZ>
<Anti_Banding_60HZ support="1"></Anti_Banding_60HZ>
<Anti_Banding_Off support="1"></Anti_Banding_Off>
</AntiBanding>
<HDR support="1"></HDR>
<ZSL support="1"></ZSL>
<DigitalZoom support="1"></DigitalZoom>
<Continue_SnapShot support="1"></Continue_SnapShot>
<InterpolationRes resolution="0"></InterpolationRes>
<PreviewSize width="0" height="0"></PreviewSize>
<Preview_Minimum_FrameRate framerate="0"></Preview_Minimum_FrameRate>
<FaceDetect support="0" MaxNum="1"></FaceDetect>
<Cproc support="1" contrast="1.1" saturation="1.0" hue="0" brightness="0"></Cproc>
<Gammaout support = "0" gamma = "1.0" offset = "0"></Gammaout>
<DV>
<DV_QCIF name="qcif" width="176" height="144" fps="10" support="1"></DV_QCIF>
<DV_QVGA name="qvga" width="320" height="240" fps="10" support="1"></DV_QVGA>
<DV_CIF name="cif" width="352" height="288" fps="10" support="1"></DV_CIF>
<DV_VGA name="480p" width="640" height="480" fps="10" support="0"></DV_VGA>
<DV_480P name="480p" width="720" height="480" fps="10" support="0"></DV_480P>
<DV_720P name="720p" width="1280" height="720" fps="10" support="1"></DV_720P>
<DV_1080P name="1080p" width="1920" height="1080" fps="10" support="1"></DV_1080P>
</DV>
</SoftWareInfo>
</CamDevie>
</BoardFile>
