想做一个APP页面，同时预览USB摄像头，和手机自带摄像头

不减肥就是� 2019-08-08 02:15:28

目标：一按拍照按钮，两个摄像头同时拍照
已经实现USB摄像头预览拍照了，但总是横屏，求思路啊，怎么同时预览

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weixin_39269343 2019-08-30

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哥们你做到同时预览usb摄像头和手机自带摄像头了吗，能不能借鉴一下，我也需要这个功能。

不减肥就是� 2019-08-14

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能同时预览了，道理我都懂，实操好揪心，向下一步能同时检测人脸前进

gxh_apologize 2019-08-09

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1.同时预览，写两个Camera不就可以了吗？ 2.拍照横屏，可以对拍完的照片做旋转90度处理，或者打开Camera后调整方向。

全志R16的android4.4.2平台点亮gc2145（evb30）版本：V1.1 1、配置ov2640在android层配置的分辨率为vga（预览/拍照/录像）注意：系统自带的快拍APP就在这里查找分辨率参数发送到camera的HAL层。这里得分辨率设置为：拍照1600x1200，预览640x480 驱动里面搜索可以设置为：1600x1200, 1280x720（花屏）, 800x600（分辨率不能切换到这里）, 640x480 提取分辨率的小知识： R:\wyb\gc2145_parrotv1.1_r16m\lichee\linux-3.4\drivers\media\video\sunxi-vfe\device\gc2145.c 搜索：_regs[] static struct regval_list sensor_default_regs[] = { （默认分辨率是VGA分辨率：640x480） /* 1600X1200 UXGA capture */ static struct regval_list sensor_uxga_regs[] ={ /* 800X600 SVGA,30fps*/ static struct regval_list sensor_svga_regs[] = //1280*720---init---/// static struct regval_list gc2145_hd720_regs[] = { R:\wyb\gc2145_parrotv1.1_r16m\android\device\softwinner\astar-evb30\configs\camera.cfg ;------------------------------------------------------------------------------- ; 用于camera的配置 ; ; 采用格式: ; key = key_value ; 注意: 每个key需要顶格写; ; key_value紧跟着key后面的等号后面, 位于同一行中; ; key_value限制大小为256字节以内; ; ;------------------------------------------------------------------------------- ;------------------------------------------------------------------------------- ; exif information of "make" and "model" ;------------------------------------------------------------------------------- key_camera_exif_make = MAKE_A31S key_camera_exif_model = MODEL_A31ST ;------------------------------------------------------------------------------- ; 1 for single camera, 2 for double camera ;------------------------------------------------------------------------------- number_of_camera = 1 ;------------------------------------------------------------------------------- ; CAMERA_FACING_BACK ; gc0307 gc2145 ;------------------------------------------------------------------------------- camera_id = 0 ;------------------------------------------------------------------------------- ; 1 for CAMERA_FACING_FRONT ; 0 for CAMERA_FACING_BACK ;------------------------------------------------------------------------------- camera_facing = 0 ;------------------------------------------------------------------------------- ; 1 for camera without isp(using built-in isp of Axx) ; 0 for camera with isp ;------------------------------------------------------------------------------- use_builtin_isp = 0 ;------------------------------------------------------------------------------- ; camera orientation (0, 90, 180, 270) ;------------------------------------------------------------------------------- camera_orientation = 90 ;------------------------------------------------------------------------------- ; driver device name ;------------------------------------------------------------------------------- camera_device = /dev/video0 ;------------------------------------------------------------------------------- ; device id ; for two camera devices with one CSI ;------------------------------------------------------------------------------- device_id = 0 used_preview_size = 1 key_support_preview_size = 640x480 key_default_preview_size = 640x480 used_picture_size = 1 ;key_support_picture_size = 1600x1200, 1280x720, 800x600, 640x480 key_support_picture_size = 1600x1200, 640x480 key_default_picture_size = 640x480 used_flash_mode = 0 key_support_flash_mode = on,off,auto key_default_flash_mode = on used_color_effect=0 key_support_color_effect = none,mono,negative,sepia,aqua key_default_color_effect = none used_frame_rate = 1 key_support_frame_rate = 10 key_default_frame_rate = 10 used_focus_mode = 0 key_support_focus_mode = auto,infinity,macro,fixed,continuous-video,continuous-picture key_default_focus_mode = auto used_scene_mode = 0 key_support_scene_mode = auto,portrait,landscape,night,night-portrait,theatre,beach,snow,sunset,steadyphoto,fireworks,sports,party,candlelight,barcode key_default_scene_mode = auto used_white_balance = 0 key_support_white_balance = auto,incandescent,fluorescent,warm-fluorescent,daylight,cloudy-daylight key_default_white_balance = auto used_exposure_compensation = 1 key_max_exposure_compensation = 3 key_min_exposure_compensation = -3 key_step_exposure_compensation = 1 key_default_exposure_compensation = 0 2、在init.rc（init.sun8i.rc）中加载gc2145.ko这个驱动模块。 R:\wyb\gc2145_parrotv1.1_r16m\android\device\softwinner\astar-evb30\init.sun8i.rc #csi module insmod /system/vendor/modules/videobuf-core.ko insmod /system/vendor/modules/videobuf-dma-contig.ko insmod /system/vendor/modules/cam_detect.ko #insmod /system/vendor/modules/actuator.ko #insmod /system/vendor/modules/ad5820_act.ko insmod /system/vendor/modules/cci.ko insmod /system/vendor/modules/vfe_os.ko insmod /system/vendor/modules/vfe_subdev.ko #insmod /system/vendor/modules/gc0307.ko #insmod /system/vendor/modules/gc0308.ko #insmod /system/vendor/modules/ov2035.ko #insmod /system/vendor/modules/ov2640.ko #insmod /system/vendor/modules/ov5640.ko insmod /system/vendor/modules/gc2145.ko insmod /system/vendor/modules/vfe_v4l2.ko 启动之后实际加载的摄像头的驱动模块： shell@astar-evb30:/ $ shell@astar-evb30:/ $ lsmod gt82x 9849 0 - Live 0x00000000 sunxi_schw 12559 0 - Live 0x00000000 (O) rtl8150 9023 0 - Live 0x00000000 sunxi_keyboard 3021 0 - Live 0x00000000 sw_device 13916 0 - Live 0x00000000 uvcvideo 61212 0 - Live 0x00000000 videobuf2_vmalloc 2600 1 uvcvideo, Live 0x00000000 videobuf2_memops 2366 1 videobuf2_vmalloc, Live 0x00000000 videobuf2_core 18902 1 uvcvideo, Live 0x00000000 vfe_v4l2 445492 1 - Live 0x00000000 gc2145 12782 0 - Live 0x00000000 vfe_subdev 4523 2 vfe_v4l2,gc2145, Live 0x00000000 vfe_os 3951 2 vfe_v4l2,vfe_subdev, Live 0x00000000 cci 21775 2 vfe_v4l2,gc2145, Live 0x00000000 videobuf_dma_contig 5567 1 vfe_v4l2, Live 0x00000000 videobuf_core 16520 2 vfe_v4l2,videobuf_dma_contig, Live 0x00000000 bcm_btlpm 7442 0 - Live 0x00000000 bcmdhd 629907 0 - Live 0x00000000 mali 210546 20 - Live 0x00000000 (O) lcd 41263 0 - Live 0x00000000 disp 992816 8 mali,lcd, Live 0x00000000 nand 282782 0 - Live 0x00000000 (O) shell@astar-evb30:/ $ 3、（可选操作）没有/dev/video1，只有/dev/video0 R:\wyb\gc2145_parrotv1.1_r16m\android\device\softwinner\astar-evb30\ueventd.sun8i.rc /dev/video0 0666 media media #/dev/video1 0666 media media 4、驱动程序：gc2145.c及其V4L2的适配层。配置gc2145.c的编译选项，只需要修改device目录中的Makefile打开gc2145即可： R:\wyb\gc2145_parrotv1.1_r16m\lichee\linux-3.4\drivers\media\video\sunxi-vfe\device\gc2145.c （请严重注意，全志R16的parrotv1.1/android4.4.2的SDK里面是没有，只有android6.0下有） R:\wyb\gc2145_parrotv1.1_r16m\lichee\linux-3.4\drivers\media\video\sunxi-vfe\device\Makefile obj-m += gc2145.o obj-m += gc2155.o （这两个不用修改：） R:\wyb\test_ov2640_r16\lichee\linux-3.4\drivers\media\video\sunxi-vfe\Kconfig R:\wyb\test_ov2640_r16\lichee\linux-3.4\drivers\media\video\sunxi-vfe\Makefile R:\wyb\gc2145_parrotv1.1_r16m\lichee\linux-3.4\drivers\media\video\sunxi-vfe\sensor_info.c struct sensor_item sensor_list_t[] = { // name i2c_addr sensor type sensor size sensor max pclk （请参照OV2640/GC2155配置） { "gc2145" , 0x78, SENSOR_YUV , PIXEL_NUM_2M , CORE_CLK_RATE_FOR_2M}, { "ov2640" , 0x60, SENSOR_YUV , PIXEL_NUM_2M , CORE_CLK_RATE_FOR_2M}, …… }; 5、 R:\wyb\gc2145_parrotv1.1_r16m\lichee\tools\pack\chips\sun8iw5p1\configs\evb-30\sys_config.fex [power_sply] dcdc1_vol = 3000 dcdc2_vol = 1100 dcdc3_vol = 1200 dcdc4_vol = 0 dcdc5_vol = 1500 aldo2_vol = 2500 aldo3_vol = 3000 dldo3_vol = 3300 eldo1_vol = 2800 eldo2_vol = 1800 eldo3_vol = 1800 ;gldo1_vol = 3300 ldoio0_vol = 2800 ldoio1_vol = 3300 ;-------------------------------------------------------------------------------- ;vip (video input port) configuration ;vip_used: 0:disable 1:enable ;vip_mode: 0:sample one interface to one buffer 1:sample two interface to one buffer ;vip_dev_qty: The quantity of devices linked to capture bus ; ;vip_define_sensor_list: If you want use sensor detect function, please set vip_define_sensor_list = 1, and ; verify that file /system/etc/hawkview/sensor_list_cfg.ini is properly configured! ; ;vip_dev(x)_pos: sensor position, "rear" or "front", if vip_define_sensor_list = 1,vip_dev(x)_pos must be configured! ; ;vip_dev(x)_isp_used 0:not use isp 1:use isp ;vip_dev(x)_fmt: 0:yuv 1:bayer raw rgb ;vip_dev(x)_stby_mode: 0:not shut down power at standby 1:shut down power at standby ;vip_dev(x)_vflip: flip in vertical direction 0:disable 1:enable ;vip_dev(x)_hflip: flip in horizontal direction 0:disable 1:enable ;vip_dev(x)_iovdd: camera module io power handle string, pmu power supply ;vip_dev(x)_iovdd_vol: camera module io power voltage, pmu power supply ;vip_dev(x)_avdd: camera module analog power handle string, pmu power supply ;vip_dev(x)_avdd_vol: camera module analog power voltage, pmu power supply ;vip_dev(x)_dvdd: camera module core power handle string, pmu power supply ;vip_dev(x)_dvdd_vol: camera module core power voltage, pmu power supply ;vip_dev(x)_afvdd: camera module vcm power handle string, pmu power supply ;vip_dev(x)_afvdd_vol: camera module vcm power voltage, pmu power supply ;x indicates the index of the devices which are linked to the same capture bus ;fill voltage in uV, e.g. iovdd = 2.8V, vip_devx_iovdd_vol = 2800000 ;fill handle string as below: ;axp22_eldo3 ;axp22_dldo4 ;axp22_eldo2 ;fill handle string "" when not using any pmu power supply ;-------------------------------------------------------------------------------- [csi0] vip_used = 1 vip_mode = 0 vip_dev_qty = 1 vip_define_sensor_list = 0 vip_csi_pck = port:PE00<2> vip_csi_mck = port:PE01<2> vip_csi_hsync = port:PE02<2> vip_csi_vsync = port:PE03<2> vip_csi_d0 = port:PE04<2> vip_csi_d1 = port:PE05<2> vip_csi_d2 = port:PE06<2> vip_csi_d3 = port:PE07<2> vip_csi_d4 = port:PE08<2> vip_csi_d5 = port:PE09<2> vip_csi_d6 = port:PE10<2> vip_csi_d7 = port:PE11<2> vip_csi_sck = port:PE12<2> vip_csi_sda = port:PE13<2> vip_dev0_mname = "gc2145" vip_dev0_pos = "rear" vip_dev0_lane = 1 vip_dev0_twi_id = 2 vip_dev0_twi_addr = 0x78 vip_dev0_isp_used = 0 vip_dev0_fmt = 0 vip_dev0_stby_mode = 0 vip_dev0_vflip = 0 vip_dev0_hflip = 0 vip_dev0_iovdd = "" vip_dev0_iovdd_vol = 2800000 vip_dev0_avdd = "axp22_ldoio0" vip_dev0_avdd_vol = 2800000 vip_dev0_dvdd = "axp22_ldoio1" vip_dev0_dvdd_vol = 1800000 vip_dev0_afvdd = "" vip_dev0_afvdd_vol = 2800000 vip_dev0_power_en = vip_dev0_reset = port:PE14<1><0> vip_dev0_pwdn = port:PE15<1><1> vip_dev0_flash_en = vip_dev0_flash_mode = vip_dev0_af_pwdn = （可选配置：） ;---------------------------------------------------------------------------------- ;usb configuration ;usb_used: usb controller enable, 0-disable, 1-enable ;usb_port_type: usb mode: 0-device, 1-host, 2-otg ;usb_detect_type: usb hotplug detect mode, 0-none, 1-vbus/id detect, 2-id/dpdm detect ;usb_id_gpio: usb id detect IO ;usb_det_vbus_gpio: usb vbus detect IO, "axp_ctrl" for axp ;usb_drv_vbus_gpio: usb dirve vbus IO ;usb_restrict_gpio: usb current restrict IO ;usb_restric_flag: usb current restrict flag ;---------------------------------------------------------------------------------- [usbc0] usb_used = 1 usb_port_type = 0 power_start = 3 6、开发板上摄像头的I2C挂载在TWI2上面了，逻辑是需要打开的（但是不打开也能够用，很奇怪！）： ;---------------------------------------------------------------------------------- ;i2c configuration ; twi_used = twix enable ;---------------------------------------------------------------------------------- [twi0] twi_used = 1 twi_scl = port:PH02<2> twi_sda = port:PH03<2> [twi1] twi_used = 1 twi_scl = port:PH04<2> twi_sda = port:PH05<2> [twi2] twi_used = 0 twi_scl = port:PE12<3> twi_sda = port:PE13<3> 直接配置摄像头的I2C了： vip_csi_sck = port:PE12<2> vip_csi_sda = port:PE13<2> 不过奇怪的是，摄像头并没有向其它平台那样生成设备节点： shell@astar-evb30:/ $ shell@astar-evb30:/ $ cd /sys/class/i2c-adapter shell@astar-evb30:/sys/class/i2c-adapter $ shell@astar-evb30:/sys/class/i2c-adapter $ shell@astar-evb30:/sys/class/i2c-adapter $ ll lrwxrwxrwx root root 1970-01-01 08:00 i2c-0 -> ../../devices/platform/twi.0/i2c-0 lrwxrwxrwx root root 1970-01-01 08:00 i2c-1 -> ../../devices/platform/twi.1/i2c-1 shell@astar-evb30:/sys/class/i2c-adapter $ 可能是全志R16的驱动程序不太规范吧！没有通过i2c_detect来注册2-003C这个节点。直接在驱动程序中读取I2C，还是对的。0xF0/0xF1 device ID = 0x2145。 #define V4L2_IDENT_SENSOR 0x2145 /* * The gc2145 sits on i2c with ID 0x78 */ #define I2C_ADDR 0x78 #define SENSOR_NAME "gc2145"

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