dll call failed

JRSmile · September 17, 2018

Hi i am strugeling with a dll call from autoit, i can't even open the dll.

the dll source can be found here, i compiled it for 32 and 64 bit with windows 10 sdk and visual studio 2017.

/ C ABI
extern "C" {
    __declspec(dllexport)
    void init() {
        CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);
    }

    __declspec(dllexport)
    void uninit() {
        CoUninitialize();
    }

    __declspec(dllexport)
    void* create_dxgi_manager() {
        DXGIManager* dxgi_manager = new DXGIManager();
        dxgi_manager->setup();
        return (void*)dxgi_manager;
    }
    __declspec(dllexport)
    void delete_dxgi_manager(void* dxgi_manager) {
        DXGIManager* m = (DXGIManager*)(dxgi_manager);
        delete m;
    }

    __declspec(dllexport)
    void set_timeout(void* dxgi_manager, uint32_t timeout) {
        ((DXGIManager*)dxgi_manager)->set_timeout(timeout);
    }

    __declspec(dllexport)
    void set_capture_source(void* dxgi_manager, uint16_t cs) {
        ((DXGIManager*)dxgi_manager)->set_capture_source(cs);
    }

    __declspec(dllexport)
    uint16_t get_capture_source(void* dxgi_manager) {
        return ((DXGIManager*)dxgi_manager)->get_capture_source();
    }

    __declspec(dllexport)
    bool refresh_output(void* dxgi_manager) {
        return ((DXGIManager*)dxgi_manager)->refresh_output();
    }

    __declspec(dllexport)
    void get_output_dimensions(void*const dxgi_manager, uint32_t* width, uint32_t* height) {
        RECT dimensions = ((DXGIManager*)dxgi_manager)->get_output_rect();
        *width = dimensions.right - dimensions.left;
        *height = dimensions.bottom - dimensions.top;
    }

    // Return the CaptureResult of acquiring frame and its data
    __declspec(dllexport)
    uint8_t get_frame_bytes(void* dxgi_manager, size_t* o_size, uint8_t** o_bytes) {
        return ((DXGIManager*)dxgi_manager)->get_output_data(o_bytes, o_size);
    }
}

// Debugging
int main(int argc, _TCHAR* argv[]) {
    init();

    auto dxgi_manager = create_dxgi_manager();
    if (dxgi_manager == NULL) {
        printf("dxgi_manager is null\n");
        return 1;
    }
    uint32_t width, height;
    get_output_dimensions(dxgi_manager, &width, &height);
    printf("%d x %d\n", width, height);

    size_t buf_size;
    uint8_t* buf = NULL;
    for (size_t i = 0; i < 60000; i++) {
        switch (get_frame_bytes(dxgi_manager, &buf_size, &buf)) {
            case CR_OK:
                break;
            case CR_ACCESS_DENIED:
                printf("Access denied\n");
                break;
            case CR_ACCESS_LOST:
                printf("Access lost\n");
                break;
            case CR_TIMEOUT:
                printf("Timeout\n");
                break;
            case CR_FAIL:
                printf("General failure\n");
                break;
        }
    }

    get_frame_bytes(dxgi_manager, &buf_size, &buf);
    
    printf("Saving capture to capture.bmp\n");

    CComPtr<IWICImagingFactory> spWICFactory;
    TRY_RETURN(spWICFactory.CoCreateInstance(CLSID_WICImagingFactory));

    CComPtr<IWICBitmap> spBitmap;
    TRY_RETURN(spWICFactory->CreateBitmapFromMemory(width, height, GUID_WICPixelFormat32bppBGRA, width * 4, buf_size, buf, &spBitmap));

    CComPtr<IWICStream> spStream;

    TRY_RETURN(spWICFactory->CreateStream(&spStream));
    TRY_RETURN(spStream->InitializeFromFilename(L"capture.bmp", GENERIC_WRITE));

    CComPtr<IWICBitmapEncoder> spEncoder;
    TRY_RETURN(spWICFactory->CreateEncoder(GUID_ContainerFormatBmp, NULL, &spEncoder));
    TRY_RETURN(spEncoder->Initialize(spStream, WICBitmapEncoderNoCache));

    CComPtr<IWICBitmapFrameEncode> spFrame;
    TRY_RETURN(spEncoder->CreateNewFrame(&spFrame, NULL));
    TRY_RETURN(spFrame->Initialize(NULL));
    TRY_RETURN(spFrame->SetSize(width, height));

    WICPixelFormatGUID format;
    TRY_RETURN(spBitmap->GetPixelFormat(&format));
    TRY_RETURN(spFrame->SetPixelFormat(&format));
    TRY_RETURN(spFrame->WriteSource(spBitmap, NULL));
    TRY_RETURN(spFrame->Commit());
    TRY_RETURN(spEncoder->Commit());

    delete_dxgi_manager(dxgi_manager);

    return 0;
}

unfortunaltely even the dll open call already fails to succeed.

#include <array.au3>
$hDLL = DllOpen(@ScriptDir & "\DXGCap64.dll")
if $hDLL = -1 Then ConsoleWrite("!ERROR " & @error & @CRLF)
DllCall($hDLL, "void", "init")
if @error Then ConsoleWrite("!ERROR" & @CRLF)
$hd = DllCall(@ScriptDir & "\DXGCap64.dll","void","init")
_ArrayDisplay($hd)
if @error Then ConsoleWrite("!ERROR" & @CRLF)
DllCall($hDLL, "void", "uninit")
if @error Then ConsoleWrite("!ERROR" & @CRLF)
DllClose($hDLL)

Quote

>Running:(3.3.14.3):C:\Program Files (x86)\AutoIt3\autoit3_x64.exe "C:\Users\user\DXGCap-master\x64\Release\hai.au3"
--> Press Ctrl+Alt+Break to Restart or Ctrl+Break to Stop
!ERROR
!ERROR
!ERROR

can anyone tell me what i do wrong?

FrancescoDiMuro · September 17, 2018

@JRSmile

if @error Then ConsoleWrite("!ERROR: " & @error & @CRLF)

So you can know what kind of error code is returned, and debug it

JRSmile · September 17, 2018

48 minutes ago, FrancescoDiMuro said:
@JRSmile
if @error Then ConsoleWrite("!ERROR: " & @error & @CRLF)
So you can know what kind of error code is returned, and debug it

as seen in the output log i dont :-( there is no errorcode in the output

trancexx · September 17, 2018

There's no such thing as "void" in AutoIt. Use "none".

JRSmile · September 17, 2018

12 minutes ago, trancexx said:

There's no such thing as "void" in AutoIt. Use "none".

thank you should have read the dllcall help better....

JRSmile · September 17, 2018

still some questions :-) @trancexx

i got further and tried to keep near the help file.

but i got stuck again.

#Region ;**** Directives created by AutoIt3Wrapper_GUI ****
#AutoIt3Wrapper_UseX64=y
#EndRegion ;**** Directives created by AutoIt3Wrapper_GUI ****
#include <array.au3>
Local $width, $hight, $output, $hdll
$hDLL = DllOpen("DXGCap64.dll")
if $hDLL = -1 Then ConsoleWrite("!ERROR 1" & @error & @CRLF)
DllCall($hDLL, "none", "init")
if @error Then ConsoleWrite("!ERROR2" & @CRLF)
DllCall($hDLL, "none", "create_dxgi_manager")
if @error Then ConsoleWrite("!ERROR3" & @CRLF)
$hd = DllCall($hdll,"USHORT","get_capture_source")
 if @error Then ConsoleWrite("!ERROR4" & @CRLF)
ConsoleWrite(_ArrayToString($hd))
;~ DllCall($hDLL, "none", "set_capture_source","USHORT",1)
;~ if @error Then ConsoleWrite("!ERROR5" & @CRLF)
;~ $hd = DllCall($hdll,"none","get_output_dimensions","ULONG_PTR",$width,"ULONG_PTR",$hight)
;~ if @error Then ConsoleWrite("!ERROR6" & @CRLF)
;~ _ArrayDisplay($hd)
;~ ConsoleWrite($width & " " & $hight & @CRLF)
;~ DllCall($hDLL, "none", "delete_dxgi_manager")
;~ if @error Then ConsoleWrite("!ERROR7" & @CRLF)
DllCall($hDLL, "none", "uninit")
if @error Then ConsoleWrite("!ERROR8" & @CRLF)
DllClose($hDLL)
if @error Then ConsoleWrite("!ERROR9" & @CRLF)

it looks like i can init the dll and get the dxgi manager created i even get a 1 back when getting capture source.

if i want to set capture source or try to get the width or hight of the desktop autoit exits.

could you assist again please?

JRSmile · September 17, 2018

cleaned it up a little.

only the commented out stuff makes my head itch.

#AutoIt3Wrapper_UseX64=y
#NoTrayIcon
#include <array.au3>
Local $width, $hight, $output, $hdll,$o_byte,$o_size
$hDLL = DllOpen("DXGCap64.dll")
DllCall($hDLL, "none", "init")
DllCall($hDLL, "none", "create_dxgi_manager")
$hd = DllCall($hdll,"USHORT","get_capture_source")
ConsoleWrite("+capsrc: " & _ArrayToString($hd) & @CRLF)
$hd = DllCall($hDLL, "BOOLEAN", "refresh_output")
ConsoleWrite("+refresh: " & _ArrayToString($hd) & @CRLF)
;~ DllCall($hDLL, "none", "set_capture_source","USHORT",1)
;~ if @error Then ConsoleWrite("!ERROR6" & @CRLF)
;~ $hd = DllCall($hdll,"none","get_output_dimensions","ULONG_PTR",$width,"ULONG_PTR",$hight)
;~ if @error Then ConsoleWrite("!ERROR7" & @CRLF)
;~ _ArrayDisplay($hd)
;~ ConsoleWrite($width & " " & $hight & @CRLF)
;~ $hd = DllCall($hdll,"BYTE","get_frame_bytes","ULONG_PTR",$o_size,"BYTE",$o_byte)
;~ ConsoleWrite("+frames: " & _ArrayToString($hd) & @CRLF)
;~ ConsoleWrite($o_size & @CRLF)
;~ ConsoleWrite($o_byte & @CRLF)
;~ DllCall($hDLL, "none", "delete_dxgi_manager")
;~ if @error Then ConsoleWrite("!ERROR8" & @CRLF)
DllCall($hDLL, "none", "uninit")
DllClose($hDLL)

i know its a type conversion problem, or do i have to use structs?

trancexx · September 17, 2018

;~ void init()
DllCall($hDLL, "none:cdecl", "init")
If @error Then Exit -1

;~ void* create_dxgi_manager()
$aCall = DllCall($hDLL, "ptr:cdecl", "create_dxgi_manager")
If @error Then Exit -2

; Read data
$pManager = $aCall[0]

;~ void get_output_dimensions(void*const dxgi_manager, uint32_t* width, uint32_t* height)
$aCall = DllCall($hDLL, "none:cdecl", "get_output_dimensions", "ptr", $pManager, "uint*", 0, "uint*", 0)
If @error Then Exit -3

ConsoleWrite("Width = " & $aCall[2] & ", Height = " & $aCall[3] & @CRLF)

;~ uint8_t get_frame_bytes(void* dxgi_manager, size_t* o_size, uint8_t** o_bytes)
Local $pBuffer, $iBufferSize
$aCall = DllCall($hDLL, "byte:cdecl", "get_frame_bytes", "ptr", $pManager, "uint*", 0, "ptr*", 0)
If @error Then Exit -4

; Read data
$iBufferSize = $aCall[2]
$pBuffer = $aCall[3]

; Fill the buffer
$aCall = DllCall($hDLL, "byte:cdecl", "get_frame_bytes", "ptr", $pManager, "uint*", $iBufferSize, "ptr", $pBuffer)
If @error Then Exit -5

; Make the data accessible thru dllstruct
$tData = DllStructCreate("byte[" & $iBufferSize & "]", $pBuffer)
If @error Then Exit -6

ConsoleWrite("Data = " & BinaryMid(DllStructGetData($tData, 1), 1, 30000) & @CRLF) ; print first 30000 bytes

;~ void delete_dxgi_manager(void* dxgi_manager)
DllCall($hDLL, "none:cdecl", "delete_dxgi_manager", "ptr", $pManager)
If @error Then Exit -7

You probably just lack experience.

KaFu · September 17, 2018

Quote

the dll source can be found here, i compiled it for 32 and 64 bit with windows 10 sdk and visual studio

Please share the compiled dlls, thanks!

JRSmile · September 18, 2018

6 hours ago, KaFu said:

Please share the compiled dlls, thanks!

as wished.

DXGCap32.dll

DXGCap64.dll

argumentum · November 22, 2018

@JRSmile, I'm curious. I checked the speed of the DLL vs. _ScreenCapture_Capture()

Spoiler

#AutoIt3Wrapper_UseX64=y

#include <array.au3>
#include <ScreenCapture.au3>
Local $iTimer = TimerInit()

Local $width, $hight, $output, $hdll,$o_byte,$o_size
$hDLL = DllOpen("DXGCap64.dll")

;~ void init()
DllCall($hDLL, "none:cdecl", "init")
If @error Then Exit -1

;~ void* create_dxgi_manager()
$aCall = DllCall($hDLL, "ptr:cdecl", "create_dxgi_manager")
If @error Then Exit -2

; Read data
$pManager = $aCall[0]

;~ void get_output_dimensions(void*const dxgi_manager, uint32_t* width, uint32_t* height)
$aCall = DllCall($hDLL, "none:cdecl", "get_output_dimensions", "ptr", $pManager, "uint*", 0, "uint*", 0)
If @error Then Exit -3

ConsoleWrite("Width = " & $aCall[2] & ", Height = " & $aCall[3] & @CRLF)

;~ uint8_t get_frame_bytes(void* dxgi_manager, size_t* o_size, uint8_t** o_bytes)
Local $pBuffer, $iBufferSize
$aCall = DllCall($hDLL, "byte:cdecl", "get_frame_bytes", "ptr", $pManager, "uint*", 0, "ptr*", 0)
If @error Then Exit -4

; Read data
$iBufferSize = $aCall[2]
$pBuffer = $aCall[3]

; Fill the buffer
$aCall = DllCall($hDLL, "byte:cdecl", "get_frame_bytes", "ptr", $pManager, "uint*", $iBufferSize, "ptr", $pBuffer)
If @error Then Exit -5

; Make the data accessible thru dllstruct
$tData = DllStructCreate("byte[" & $iBufferSize & "]", $pBuffer)
If @error Then Exit -6

;~ ConsoleWrite("Data = " & BinaryMid(DllStructGetData($tData, 1), 1, 30000) & @CRLF) ; print first 30000 bytes
;~ FileDelete(@ScriptDir & "\DXGCap64.Cap.bmp")
;~ FileWrite(@ScriptDir & "\DXGCap64.Cap.bmp", DllStructGetData($tData, 1))

;~ void delete_dxgi_manager(void* dxgi_manager)
DllCall($hDLL, "none:cdecl", "delete_dxgi_manager", "ptr", $pManager)
If @error Then Exit -7



ConsoleWrite(TimerDiff($iTimer) & @CRLF)
$iTimer = TimerInit()

Example()
ConsoleWrite(TimerDiff($iTimer) & @CRLF)


Func Example()
    Local $hBmp
    ; Capture full screen
    $hBmp = _ScreenCapture_Capture("")
    ; Save bitmap to file
;~  _ScreenCapture_SaveImage(@MyDocumentsDir & "\GDIPlus_Image.jpg", $hBmp)
;~  ShellExecute(@MyDocumentsDir & "\GDIPlus_Image.jpg")
EndFunc   ;==>Example

and I don't see the gain ( other than to learn. I don't know how to save the image in the struct ).
If you care to share the story ( and how to save the capture to file )

caramen · November 23, 2018

On 17/09/2018 at 11:27 PM, trancexx said:

You probably just lack experience.

After all i did in autoIT i am now getting more and more day after day to manipulate DLL's Do anyone got an/some advise for me for learn how to play with DLL in AutoIT ? I need theory. And of course some practices.

Maybe in frensh if you are or in english no problem

Edited November 23, 2018 by caramen

Danyfirex · November 23, 2018

@caramen You should do a forum search here is a Tutorial

You can check AutoIt include UDFs compare with MSDN API calls etc. Tips: Learn Dllcall correct declaration, Make sure to do correct data conversion from API to AutoIt Dllcall, Learn About Pointers.

Saludos

caramen · November 23, 2018

@Danyfirex Rooooooh Man Thx I will do that this week end .

JRSmile · November 27, 2018

On 22.11.2018 at 8:28 PM, argumentum said:

@JRSmile, I'm curious. I checked the speed of the DLL vs. _ScreenCapture_Capture()

and I don't see the gain ( other than to learn. I don't know how to save the image in the struct ).
If you care to share the story ( and how to save the capture to file )

@argumentum i needed a solution that is known to be able to read the GPU framebuffer.

a screenshot didn't capture all overlays in my tests.

the other thing from what i undertand that the process writing to the gpu is not able to see the copy of the frame beeing leeached. and is not disturbed otherwise.

i theory you could be able to get nearly realtime fps from the dxgi api at least on newer cards as the use the copy commands which are part of the gpu.

i am researching KI and a quick and application independant true grab of the gpu framebuffer is key to my solution.

autoit helps for POCs but i think i have to switch to python soon :-(

these new tensor cores on rtx 2060+ cards are more then interresting.

i was able to save a bmp, you might want to look at the original source.

https://github.com/pgurenko/DXGICaptureSample/blob/master/DXGICaptureSample/DXGICaptureSample.cpp

Edited November 27, 2018 by JRSmile

malcev · January 16, 2019

JRSmile, I cannot run Your dll on win7.

I ve got error: on this line:

Quote

$aCall = DllCall($hDLL, "none:cdecl", "get_output_dimensions", "ptr", $pManager, "uint*", 0, "uint*", 0)

>Exit code: 3221225477 Time: 3.087

Does it occur because You compiled it with windows 10 sdk and visual studio 2017?

Thank You!

malcev · January 16, 2019

As I understand correctly it uses Desktop Duplication API which is only for win8+.

Therefore it will not work on Win7.

trancexx, can You help please to transfer this code from c++ to autoit.

It gives opportunity to save 30 frames per second.

// DXGICaptureSample.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include "DXGIManager.h"
#include <time.h>

DXGIManager g_DXGIManager;

int capture(RECT& rcDim, vector<BYTE>& buf, CComPtr<IWICImagingFactory>& spWICFactory) {
  DWORD dwWidth = rcDim.right - rcDim.left;
  DWORD dwHeight = rcDim.bottom - rcDim.top;
  DWORD dwBufSize = buf.size();

  HRESULT hr = g_DXGIManager.GetOutputBits(buf.data(), rcDim);
  if (FAILED(hr))
  {
    printf("GetOutputBits failed with hr=0x%08x\n", hr);
    return hr;
  }
  return 0;
}

int _tmain(int argc, _TCHAR* argv[]) {
  CoInitialize(NULL);

  g_DXGIManager.SetCaptureSource(CSDesktop);

  RECT rcDim;
  g_DXGIManager.GetOutputRect(rcDim);

  DWORD dwWidth = rcDim.right - rcDim.left;
  DWORD dwHeight = rcDim.bottom - rcDim.top;

  printf("dwWidth=%d dwHeight=%d\n", dwWidth, dwHeight);

  DWORD dwBufSize = dwWidth*dwHeight * 4;

  vector<BYTE> buf(dwBufSize);

  CComPtr<IWICImagingFactory> spWICFactory = NULL;
  HRESULT hr = spWICFactory.CoCreateInstance(CLSID_WICImagingFactory);
  if (FAILED(hr))
    return hr;

  clock_t t1 = clock();
  int i;
  int iterations = 100;  
  for (i = 0; i < iterations; i++) {
    capture(rcDim, buf, spWICFactory);
  }
  clock_t t2 = clock();
  printf("%d iterations: %0.0f fps\n", iterations, iterations / ((double)(t2 - t1) / CLOCKS_PER_SEC));

  return 0;
}

https://github.com/pgurenko/DXGICaptureSample/issues/2#issuecomment-334050901

Thank You!

johnmike69 · January 22, 2019

I stuck with the same problem, I am facing the same error. How can I fix this!

$aCall = DllCall($hDLL, "none:cdecl", "get_output_dimensions", "ptr", $pManager, "uint*", 0, "uint*", 0)

>Exit code: 3221225477 Time: 3.087

Edited January 24, 2019 by johnmike69

malcev · January 23, 2019

If You use win7 then this code will not work for You.

Edited January 23, 2019 by malcev

milos83 · February 4, 2019

Did anyone got the working code out of this?

As in screen capturing.

@JRSmile You said you managed to get it to save to bmp.

Can you share that code?

dll call failed

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