I am trying to set the datetime of a Sony RX0 II using the Sony SDK. Without modifying too much to the RemoteCli.cpp code that is provided as an example, I added a case there and create a new function in CameraDevice.cpp like this one
void CameraDevice::set_datetime()
{
// Set the new date at 1970/01/01
CrInt64 newdate = 0;
SDK::CrDeviceProperty prop;
prop.SetCode(SDK::CrDevicePropertyCode::CrDeviceProperty_DateTime_Settings);
prop.SetCurrentValue(newdate);
prop.SetValueType(SDK::CrDataType::CrDataType_UInt64);
auto err = SDK::SetDeviceProperty(m_device_handle, &prop);
if (CR_FAILED(err)) {
tout << "Failed to set new date path.\n";
}
I do not get any error, so it should work but I never got the new time written on the camera
Related
I've implemented a custom CRecordset class, and have code similar to the following:
ASSERT(prs->GetRowsetSize() == 25);
while (!prs->IsEOF())
{
for (int i = 1; i <= prs->GetRowsFetched(); i++)
{
prs->SetRowsetCursorPosition((WORD)i);
// Inspecting data here...
}
prs->MoveNext();
}
prs->Close();
Apparently, when using multi-row fetch, CRecordset does not call my DoFieldExchange override as it does when not using multi-row fetch, and that is by design. And so my data isn't automatically populated. So the question is how do I get the data?
The answer appears to be by calling GetFieldValue(). But I get an Invalid cursor position error when I do! (GetFieldValue() works fine when I'm not using multi-row fetch.)
Below is a streamlined version of my recordset class. In addition, #EylM was good enough to create a sample in the answers below that he says does work for him. However, when I copied his code exactly and just changed what was needed to connect to and query my database, I still get an Invalid cursor position when I call GetFieldValue().
I don't know what else could be different. I see he's using MySQL where I'm using SQL Server. But surely CRecordset works with SQL Server. I've also tried all the available SQL Server ODBC drivers, but the result is always the same.
class CRS : public CRecordset
{
public:
// Data variables
int m_nId;
TCHAR m_szName[CUSTOMER_NAME_MAXLENGTH + 1];
// Bulk data variables
int* m_pnIds;
long* m_pnIdLengths;
LPTSTR m_pszNames;
long* m_pnNameLengths;
// Constructor
CRS(CDatabase* pDatabase = NULL)
: CRecordset(pDatabase)
{
m_nFields = 2;
m_nId = 0;
m_szName[0] = '\0';
m_pnIds = NULL;
m_pnIdLengths = NULL;
m_pszNames = NULL;
m_pnNameLengths = NULL;
}
CString GetDefaultSQL()
{
return CCustomerData::m_szTableName;
}
// This method is never called when
// CRecordset::useMultiRowFetch is specified!
void DoFieldExchange(CFieldExchange* pFX)
{
pFX->SetFieldType(CFieldExchange::outputColumn);
RFX_Int(pFX, _T("Id"), m_nId);
RFX_Text(pFX, _T("Name"), m_szName, CUSTOMER_NAME_MAXLENGTH);
}
// This method is called several times
void DoBulkFieldExchange(CFieldExchange* pFX)
{
pFX->SetFieldType(CFieldExchange::outputColumn);
RFX_Int_Bulk(pFX, _T("Id"), &m_pnIds, &m_pnIdLengths);
RFX_Text_Bulk(pFX, _T("Name"), &m_pszNames, &m_pnNameLengths, (CUSTOMER_NAME_MAXLENGTH + 1) * 2);
}
};
UPDATE:
Spending more time on this, I have been able to write code that reads the data directly from the rowset data (in my case, from m_pnIds, m_pnIdLengths, m_pszNames and m_pnNameLengths). Perhaps that's the approach I need to take.
But the question still stands. Why can't I use GetFieldValue() on a SQL Server database? And what is the point of SetRowsetCursorPosition()?
From documentation of CRecordset::DoFieldExchange:
When bulk row fetching is not implemented, the framework calls this
member function to automatically exchange data between the field data
members of your recordset object and the corresponding columns of the
current record on the data source.
DoFieldExchange is called only if CRecordset::useMultiRowFetch is not specified in the Open function.
Looking at MFC code CRecordset::BindFieldsToColumns, dbcore.cpp using VS 2019 (14.22.27905):
// Binding depends on fetch type
if (m_dwOptions & useMultiRowFetch)
DoBulkFieldExchange(&fx);
else
DoFieldExchange(&fx);
Sounds like that behaviour your are getting is by design.
Edit:
Here is working example for multi row fetch. The thing that did the trick is CRecordset::useExtendedFetch in the opening flags.
Database:
I used MySQL with a simple table with 2 columns. Here is the creation script.
CREATE TABLE `categories` (
`CatID` int(11) NOT NULL,
`Category` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
PRIMARY KEY (`CatID`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci
MFC:
CMultiRowSet.h
class CMultiRowSet : public CRecordset
{
public:
CMultiRowSet(CDatabase* pDB);
virtual void DoBulkFieldExchange(CFieldExchange* pFX);
// Field/Param Data
// field data members
long* m_rgID;
LPSTR m_rgName;
// pointers for the lengths
// of the field data
long* m_rgIDLengths;
long* m_rgNameLengths;
};
CMultiRowSet.cpp
void CMultiRowSet::DoBulkFieldExchange(CFieldExchange* pFX)
{
// call the Bulk RFX functions
// for field data members
pFX->SetFieldType(CFieldExchange::outputColumn);
RFX_Long_Bulk(pFX, _T("[CatID]"),
&m_rgID, &m_rgIDLengths);
RFX_Text_Bulk(pFX, _T("[Category]"),
&m_rgName, &m_rgNameLengths, 30);
}
Usage:
CDatabase database;
CString sCatID, sCategory;
TRY
{
CString connStr = (_T("Driver={MySQL ODBC 8.0 Unicode Driver};Server=localhost;Database=XXXX;User=XXX; Password=XXXX; Option = 3;"));
// Open the database
database.OpenEx(connStr,CDatabase::noOdbcDialog);
// Allocate the recordset
CMultiRowSet recset(&database);
// Execute the query
// make sure you use CRecordset::useExtendedFetch.
recset.Open(CRecordset::forwardOnly, _T("SELECT CatID, Category FROM Categories"), CRecordset::readOnly|CRecordset::useMultiRowFetch|CRecordset::useExtendedFetch);
// Loop through each record
while (!recset.IsEOF())
{
// The default `GetRowsetSize` is 25. I have 4 rows in my database.
// GetRowsFetched returns 4 in my case.
for (int rowCount = 1; rowCount <= (int)recset.GetRowsFetched(); rowCount++)
{
recset.SetRowsetCursorPosition(rowCount);
// Copy each column into a variable
recset.GetFieldValue(_T("CatID"), sCatID);
recset.GetFieldValue(_T("Category"), sCategory);
}
// goto next record
recset.MoveNext();
}
recset.Close();
// Close the database
database.Close();
}
CATCH(CDBException, e)
{
// If a database exception occured, show error msg
AfxMessageBox(_T("Database error: ") + e->m_strError);
}
END_CATCH;
HiI need to stream a video file and save it using LIBVLC. Here is what I have done so far:
libvlc_media_t* vlcMedia = nullptr;
libvlc_instance_t* vlcInstance = libvlc_new(0, nullptr);
vlcMedia = libvlc_media_new_location(vlcInstance, aUri);
if(nullptr != vlcMedia)
{
libvlc_media_player_t* vlcMediaPlayer = libvlc_media_player_new_from_media(vlcMedia);
if(nullptr != vlcMediaPlayer)
{
libvlc_media_release(vlcMedia);
libvlc_event_manager_t* vlcMediaManager = libvlc_media_player_event_manager(vlcMediaPlayer);
if(nullptr != vlcMediaManager)
libvlc_event_attach(vlcMediaManager, libvlc_MediaPlayerEndReached, OnStopped, this);
libvlc_media_player_set_hwnd(vlcMediaPlayer, Handle);
libvlc_media_player_play(vlcMediaPlayer);
}
}
This will connect to the remote media and starts playing the video. The question is how do I direct it to save the video? I could not find the API call for that.
Thank youSam
Thanks to #mtz the solution is to add:
libvlc_media_add_option(vlcMedia,":sout=#duplicate{dst=display,dst=std{access=file,mux=mp4,dst=xyz.mp4}");
after the call to libvlc_media_new_location.
Here's a C# version that you can easily adapt to C/C++
var currentDirectory = Path.GetDirectoryName(Assembly.GetEntryAssembly().Location);
var destination = Path.Combine(currentDirectory, "record.ts");
// Load native libvlc library
Core.Initialize();
using (var libvlc = new LibVLC())
using (var mediaPlayer = new MediaPlayer(libvlc))
{
// Redirect log output to the console
libvlc.Log += (sender, e) => Console.WriteLine($"[{e.Level}] {e.Module}:{e.Message}");
// Create new media with HLS link
var media = new Media(libvlc, "http://hls1.addictradio.net/addictrock_aac_hls/playlist.m3u8", FromType.FromLocation);
// Define stream output options.
// In this case stream to a file with the given path and play locally the stream while streaming it.
media.AddOption(":sout=#file{dst=" + destination + "}");
media.AddOption(":sout-keep");
// Start recording
mediaPlayer.Play(media);
Console.WriteLine($"Recording in {destination}");
Console.WriteLine("Press any key to exit");
Console.ReadKey();
}
The aspose.barcode reader is unable to read the barcode of type DecodeType.Code128
Workflow Steps
1>Using Aspose.Barcode we have created a barcode using DecodeType.Code128 and put on PDF page ( our clients use this page as separator sheet)
2>Our client then insert this barcode page between several physical documents and scanned them all, which creates big single PDF
3>Our splitting process then, loop through all pages and check if any page is barcode page, and splits the big PDF into individual small PDF
Issue is some times the scanned quality of the barcode is not that great, and in such case ASPOSE.Barcode unable to read the barcode.
I have attached couple of barcode PDF with low scanned quality, and aspose is not able to read these barcodes. I have tried different combinations of RecognitionMode and ManualHints options without any luck
Below is my code to identity barcode page
using (var fs = new FileStream(file, FileMode.Open))
{
var pdfDocument = new Document(fs);
foreach (Page page in pdfDocument.Pages)
{
var isSeparator = splitter.IsSeparator(page);
Assert.IsTrue(isSeparator);
}
}
public bool IsSeparator(Page page)
{
if (page.Resources.Images != null && page.Resources.Images.Count >= 1)
{
var img = page.Resources.Images[1];
using (MemoryStream barcodeImage = new MemoryStream())
{
img.Save(barcodeImage, ImageFormat.Jpeg);
barcodeImage.Seek(0L, SeekOrigin.Begin);
using (BarCodeReader barcodeReader = new BarCodeReader(barcodeImage, _barcodeDecodeType))
{
barcodeReader.RecognitionMode = RecognitionMode.MaxQuality;
while (barcodeReader.Read())
{
var barcodeText = barcodeReader.GetCodeText();
if (barcodeText.ToLower() == "eof")
{
return true;
}
}
}
}
}
return false;
}
Unable to reproduce the issue at my end. I used the following sample code snippet to recognize the barcode along with latest version of the API. It is always recommended to use the latest version of the API as it contains new features and improvements.
CODE:
Aspose.Pdf.License licensePdf = new Aspose.Pdf.License();
licensePdf.SetLicense(#"Aspose.Total.lic");
// bind the pdf document
Aspose.Pdf.Facades.PdfExtractor pdfExtractor = new Aspose.Pdf.Facades.PdfExtractor();
pdfExtractor.BindPdf(#"173483_2.pdf");
// extract the images
pdfExtractor.ExtractImage();
// save images to stream in a loop
while (pdfExtractor.HasNextImage())
{
// save image to stream
System.IO.MemoryStream imageStream = new System.IO.MemoryStream();
pdfExtractor.GetNextImage(imageStream);
imageStream.Position = 0;
Aspose.BarCode.BarCodeRecognition.BarCodeReader barcodeReader =
new Aspose.BarCode.BarCodeRecognition.BarCodeReader(imageStream);
while (barcodeReader.Read())
{
Console.WriteLine("Codetext found: " + barcodeReader.GetCodeText() + ", Symbology: " + barcodeReader.GetCodeType().ToString());
}
// close the reader
barcodeReader.Close();
}
Further to update you that the same query has been post on Aspose.BarCode support forum. You may please visit the link for details.
I work as developer evangelist at Aspose.
I am trying to query a list of available video capture devices (webcams) on windows using gstreamer 1.0 in c++.
I am using ksvideosrc as source and i am able to capture the video input but i can't query a list of available devices (and their caps).
On gstreamer 0.10 it has been possible through GstPropertyProbe which is removed in gstreamer 1.0. The documentation suggests using GstDeviceMonitor. But i have no luck using that either.
Has anyone succeeded in acquiring a list of device names? Or can you suggests another way of retrieving the available device names and their caps?
You can use GstDeviceMonitor and gst_device_monitor_get_devices () function.
First initialize GstDeviceMonitor by gst_device_monitor_new().
Second start the monitor by gst_device_monitor_start(pMonitor).
Third, get devices list by gst_device_monitor_get_devices(pMonitor).
Code would be like this:
GstDeviceMonitor* monitor= gst_device_monitor_new();
if(!gst_device_monitor_start(monitor)){
printf("WARNING: Monitor couldn't started!!\n");
}
GList* devices = gst_device_monitor_get_devices(monitor);
My references:
https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstDeviceMonitor.html#gst-device-monitor-get-devices
Although I haven't figured out how to enumerate the device names, I've come up with a workaround to at least get the available ksvideosrc device indexes. Below is the code in Python, but you should be able to port it to C++ fairly easily, thanks to the GObject introspection bindings.
from gi.repository import Gst
def get_ksvideosrc_device_indexes():
device_index = 0
video_src = Gst.ElementFactory.make('ksvideosrc')
state_change_code = None
while True:
video_src.set_state(Gst.State.NULL)
video_src.set_property('device-index', device_index)
state_change_code = video_src.set_state(Gst.State.READY)
if state_change_code != Gst.StateChangeReturn.SUCCESS:
video_src.set_state(Gst.State.NULL)
break
device_index += 1
return range(device_index)
if __name__ == '__main__':
Gst.init()
print get_ksvideosrc_device_indexes()
Note that the video source device-name property is None as of GStreamer version 1.4.5.0 on Windows for the ksvideosrc.
It's very late, but for the future...
The Gst.DeviceMonitor can be used to enumerate devices, and register an addition or removal of a device.
Here's how to get device names in C# with GStreamer 1.14
static class Devices
{
public static void Run(string[] args)
{
Application.Init(ref args);
GtkSharp.GstreamerSharp.ObjectManager.Initialize();
var devmon = new DeviceMonitor();
// to show only cameras
// var caps = new Caps("video/x-raw");
// var filtId = devmon.AddFilter("Video/Source", caps);
var bus = devmon.Bus;
bus.AddWatch(OnBusMessage);
if (!devmon.Start())
{
"Device monitor cannot start".PrintErr();
return;
}
Console.WriteLine("Video devices count = " + devmon.Devices.Length);
foreach (var dev in devmon.Devices)
DumpDevice(dev);
var loop = new GLib.MainLoop();
loop.Run();
}
static void DumpDevice(Device d)
{
Console.WriteLine($"{d.DeviceClass} : {d.DisplayName} : {d.Name} ");
}
static bool OnBusMessage(Bus bus, Message message)
{
switch (message.Type)
{
case MessageType.DeviceAdded:
{
var dev = message.ParseDeviceAdded();
Console.WriteLine("Device added: ");
DumpDevice(dev);
break;
}
case MessageType.DeviceRemoved:
{
var dev = message.ParseDeviceRemoved();
Console.WriteLine("Device removed: ");
DumpDevice(dev);
break;
}
}
return true;
}
}
I'm generating a reporting services report from an ASP.NET (MVC) based application but am having problems setting the parameters for the report.
I believe the issue has only occurred since we upgraded SQL Server from 2005 to 2008 R2 (and Reporting Services along with it).
The original error encountered was from calling rsExec.Render:
Procedure or function 'pCommunication_ReturnRegistrationLetterDetails'
expects parameter '#guid', which was not supplied.
Debugging the code I noticed that rsExec.SetExecutionParameters is returning the following response:
Cannot call 'NameOfApp.SQLRSExec.ReportExecutionService.SetExecutionParameters(NameOfApp.SQLRSExec.ParameterValue[],
string)' because it is a web method.
Here is the function in it's entirety:
public static bool ProduceReportToFile(string reportname, string filename, string[,] reportparams,
string fileformat)
{
bool successful = false;
SQLRS.ReportingService2005 rs = new SQLRS.ReportingService2005();
SQLRSExec.ReportExecutionService rsExec = new NameOfApp.SQLRSExec.ReportExecutionService();
rs.Credentials = System.Net.CredentialCache.DefaultCredentials;
rsExec.Credentials = System.Net.CredentialCache.DefaultCredentials;
// Prepare Render arguments
string historyID = null;
string deviceInfo = null;
// Prepare format - available options are "PDF","Word","CSV","TIFF","XML","EXCEL"
string format = fileformat;
Byte[] results;
string encoding = String.Empty;
string mimeType = String.Empty;
string extension = String.Empty;
SQLRSExec.Warning[] warnings = null;
string[] streamIDs = null;
// Define variables needed for GetParameters() method
// Get the report name
string _reportName = reportname;
string _historyID = null;
bool _forRendering = false;
SQLRS.ParameterValue[] _values = null;
SQLRS.DataSourceCredentials[] _credentials = null;
SQLRS.ReportParameter[] _parameters = null;
// Get if any parameters needed.
_parameters = rs.GetReportParameters(_reportName, _historyID,
_forRendering, _values, _credentials);
// Load the selected report.
SQLRSExec.ExecutionInfo ei =
rsExec.LoadReport(_reportName, historyID);
// Prepare report parameter.
// Set the parameters for the report needed.
SQLRSExec.ParameterValue[] parameters =
new SQLRSExec.ParameterValue[1];
// Place to include the parameter.
if (_parameters.Length > 0)
{
for (int i = 0; i < _parameters.Length; i++)
{
parameters[i] = new SQLRSExec.ParameterValue();
parameters[i].Label = reportparams[i,0];
parameters[i].Name = reportparams[i, 0];
parameters[i].Value = reportparams[i, 1];
}
}
rsExec.SetExecutionParameters(parameters, "en-us");
results = rsExec.Render(format, deviceInfo,
out extension, out encoding,
out mimeType, out warnings, out streamIDs);
// Create a file stream and write the report to it
using (FileStream stream = System.IO.File.OpenWrite(filename))
{
stream.Write(results, 0, results.Length);
}
successful = true;
return successful;
}
Any ideas why I'm now unable to set parameters? The report generation works without issue if parameters aren't required.
Looks like it may have been an issue with how reporting services passes parameters through to the stored procedure providing the data. A string guid was being passed through to the report and the stored procedure expected a varchar guid. I suspect reporting services may have been noticing the string followed the guid format pattern and so passed it through as a uniqueidentifier to the stored procedure.
I changed the data source for the report from "stored procedure" to "text" and set the SQL as "EXEC pMyStoredOProcName #guid".
Please note the guid being passed in as a string to the stored procedure is probably not best practice... I was simply debugging an issue with another developers code.
Parameter _reportName cannot be null or empty. The [CLASSNAME].[METHODNAME]() reflection API could not create and return the SrsReportNameAttribute object
In this specific case it looks like an earlier full compile did not finish.
If you encounter this problem I would suggest that you first compile the class mentioned in the error message and see if this solves the problem.
go to AOT (get Ctrl+D)
in classes find CLASSNAME
3.compile it (F7)