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Java wrapper for libuvc

License: GNU General Public License v2.0

Java 100.00%

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jLibuvc

Java wrapper for libuvc

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jlibuvc's Issues

uvc_get_pantilt_abs format

...
IntPointer curPan = new IntPointer();
IntPointer curTilt = new IntPointer();
UVCController.uvc_get_pantilt_abs(devh, curPan, curTilt, UVCController.UVCReqCode.UVC_GET_INFO);
System.out.println(curPan.get(0));

curPan.get(0) always returns null pointer.
UVC_GET_CUR crashes

Exception in thread "main" java.lang.UnsatisfiedLinkError: no jniUVCController in java.library.path

Not sure what to do about this.

read autoExposure mode from Device

I have the UVC device in AutoExposure, but my attempt to read that state reports 0.

public boolean isAutoExposure(UVCDeviceHandle devH) throws Exception {
    ByteBuffer bBuff = ByteBuffer.allocate(1);
    int errCode = 0;
    UVCController.uvc_get_ae_mode(devH,bBuff,errCode);
    byte autoAE = bBuff.get(0);
    System.out.println(autoAE);
    return (autoAE!=0);
 }

any suggestions on how to get this to report correctly? I assume I am misunderstanding how to read the ByteBuffer and convert to boolean.

invalid conversion from ‘void ()(uvc_frame)’ to ‘void ()(uvc_frame, void*)’ [-fpermissive]

I tried to build jLibuvc, but encountered:

/home/bram/project/jLibuvc/target/classes/cl/cc/jlibuvc/jniUVCController.cpp: In function ‘jint Java_cl_cc_jlibuvc_UVCController_uvc_1start_1streaming(JNIEnv*, jclass, jobject, jobject, jobject, jobject, jbyte)’:
/home/bram/project/jLibuvc/target/classes/cl/cc/jlibuvc/jniUVCController.cpp:3541:99: error: invalid conversion from ‘void (*)(uvc_frame*)’ to ‘void (*)(uvc_frame*, void*)’ [-fpermissive]
         int rvalue = uvc_start_streaming(ptr0, ptr1, (ptr2 == NULL ? NULL : ptr2->ptr), ptr3, arg4);
                                                                                                   ^
In file included from /home/bram/project/jLibuvc/target/classes/cl/cc/jlibuvc/jniUVCController.cpp:62:0:
/usr/local/include/libuvc/libuvc.h:512:13: error:   initializing argument 3 of ‘uvc_error_t uvc_start_streaming(uvc_device_handle_t*, uvc_stream_ctrl_t*, void (*)(uvc_frame*, void*), void*, uint8_t)’ [-fpermissive]
 uvc_error_t uvc_start_streaming(
             ^
Generating /home/bram/project/jLibuvc/target/classes/cl/cc/jlibuvc/jniUVCController.cpp
Compiling /home/bram/project/jLibuvc/target/classes/cl/cc/jlibuvc/linux-x86_64/libjniUVCController.so
g++ -I/usr/local/jdk1.7.0_60/include -I/usr/local/jdk1.7.0_60/include/linux /home/bram/project/jLibuvc/target/classes/cl/cc/jlibuvc/jniUVCController.cpp -luvc -Wl,-rpath,$ORIGIN/ -march=x86-64 -m64 -Wall -O3 -fPIC -shared -s -o /home/bram/project/jLibuvc/target/classes/cl/cc/jlibuvc/linux-x86_64/libjniUVCController.so

to me this looks like UVCFrameCallback does not match

typedef void(uvc_frame_callback_t)(struct uvc_frame *frame, void *user_ptr);

but I'm not familiar with these structures.

JRE crashes when trying to open a non-valid uvc device

attempting to open a non-existing device with ...
System.out.println("Open Device: " + UVCController.uvc_open(dev, devh));
crashes the JRE

#
# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0x000000012a0b88a7, pid=33115, tid=4867
#
# JRE version: Java(TM) SE Runtime Environment (8.0_60-b27) (build 1.8.0_60-b27)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (25.60-b23 mixed mode bsd-amd64 compressed oops)
# Problematic frame:
# C  [libuvc.dylib+0x48a7]  uvc_open+0x17

...

is there a way to handle this more gracefully? can i check whether the dev is valid before i blow it up by trying? any workarounds are greatly appreciated.

uvc_get_device_list

hi, i am eager to use the following C call

uvc_error_t uvc_get_device_list (uvc_context_t * ctx, uvc_device_t *** list)

via javacpp and I am struggling with the part that returns the list. my initial stab at this one is ...

public static native int uvc_get_device_list(UVCContext ctx, @Cast("uvc_device_t***") list);

but that really was just a first guess. any suggestions on how to make this call work? thanks

no jniUVCController in java.library.path

the libuvc installation with dylib exists /opt/local/lib/ and works well with my libuvc examples in C. i am trying to get the java wrapper to work in its most simplified form and am running into link error ...

public static void main(String... arg) throws InterruptedException {
System.load("/opt/local/lib/libuvc.dylib");
System.out.println(""We weighed anchor in anger, set sail for revenge ..."");
UVCContext ctx = new UVCController.UVCContext();
int res = UVCController.uvc_init(ctx, null);
}

UVCController.uvc_init() throws ...

Exception in thread "main" java.lang.UnsatisfiedLinkError: no jniUVCController in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1864)
at java.lang.Runtime.loadLibrary0(Runtime.java:870)
at java.lang.System.loadLibrary(System.java:1122)
at org.bytedeco.javacpp.Loader.loadLibrary(Loader.java:550)
at org.bytedeco.javacpp.Loader.load(Loader.java:415)
at org.bytedeco.javacpp.Loader.load(Loader.java:358)
at cl.cc.jlibuvc.UVCController.(UVCController.java:123)
at Load.main(Load.java:22)

any suggestions greatly appreciated ...

Failing compiling on Windows 10

Setup: Windows 10, Java 14, libusb and libuvc install, created c:\usr\local for lib and include and placed the includes and libucv.lib. Commented out libjpeg lines. mvn clean package:

   Creating library jniUVCController.lib and object jniUVCController.exp
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_zoom_rel
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_stream_ctrl_format_size
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_focus_simple_range
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_focus_rel
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_analog_video_lock_status
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_digital_multiplier_limit
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_start_streaming
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_exposure_abs
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_exposure_abs
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_find_device
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_focus_auto
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_contrast_auto
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_white_balance_temperature_auto
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_any2rgb
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_white_balance_component
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_brightness
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_saturation
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_roll_abs
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_exit
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_hue_auto
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_probe_stream_ctrl
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_hue
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_digital_multiplier_limit
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_white_balance_component_auto
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_digital_multiplier
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_bus_number
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_zoom_abs
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_white_balance_temperature
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_ae_priority
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_device_address
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_saturation
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_ae_mode
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_sharpness
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_analog_video_standard
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_power_line_frequency
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_hue_auto
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_white_balance_component
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_device_descriptor
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_open
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_focus_auto
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_scanning_mode
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_input_select
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_pantilt_abs
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_focus_abs
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_backlight_compensation
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_ref_device
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_digital_window
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_close
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_focus_simple_range
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_ae_priority
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_brightness
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_focus_abs
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_white_balance_temperature_auto
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_unref_device
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_analog_video_lock_status
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_iris_rel
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_backlight_compensation
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_exposure_rel
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_pantilt_rel
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_hue
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_digital_roi
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_iris_abs
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_digital_roi
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_gain
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_roll_abs
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_roll_rel
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_init
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_print_diag
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_gamma
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_contrast_auto
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_iris_rel
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_free_frame
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_free_device_list
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_zoom_rel
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_input_select
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_white_balance_temperature
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_white_balance_component_auto
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_contrast
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_pantilt_rel
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_focus_rel
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_sharpness
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_pantilt_abs
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_gamma
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_stop_streaming
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_exposure_rel
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_allocate_frame
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_device_list
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_power_line_frequency
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_privacy
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_zoom_abs
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_format_descs
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_scanning_mode
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_free_device_descriptor
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_gain
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_digital_multiplier
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_privacy
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_roll_rel
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_ae_mode
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_contrast
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_get_digital_window
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_analog_video_standard
jniUVCController.obj : error LNK2001: unresolved external symbol _uvc_set_iris_abs
jniUVCController.dll : fatal error LNK1120: 102 unresolved externals
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  11.862 s
[INFO] Finished at: 2020-07-09T23:04:44-07:00
[INFO] ------------------------------------------------------------------------

usbContext

i can get a usb handle for a device handle in libuvc with

libusb_device_handle* uvc_get_libusb_handle (uvc_device_handle_t* devh)

but I don't know how to handle the return part in jLibuvc ... any recommendations for how to get the usb device info? thanks,

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