数日間、カメラから撮影した写真を取得しようとしました。今日見つけた
EdsSetPropertyData(cRef, PropID_SaveTo, 0, 4, 2);
写真をカメラに保存しません。しかし、私の問題は現在、カメラから画像を取得できないことです。私の ObjectEventHandler が呼び出されることはありません (初期化時に前の画像に対して呼び出されることがあります)。これが私の呼び出し元です(メイン関数内):
Camera camera = new Camera();
Thread thread = new Thread(new ThreadStart(camera.DoThings));
thread.Start();
そして、ここに私のCCクラス(カメラコントロール)があります
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using EDSDKLib;
namespace CCCBSv2
{
class CC : EDSDK
{
IntPtr cRef;
// Initilizes, takes picture and uninitilizes
public void RunSeq()
{
uint err;
err = Initialize();
if (err != EDS_ERR_OK)
{
return;
}
err = TakePicture();
if (err != EDS_ERR_OK)
{
return;
}
Uninitilize();
}
public uint Initialize()
{
// err init
uint err;
// Initilize SDK.
// SDK initilizion is needed to use EDSDK functions
err = EdsInitializeSDK();
// In case of error pass it on...
if (err != EDS_ERR_OK)
{
return err;
}
// get first camera connected to computer
err = GetFirstCamera();
if (err != EDS_ERR_OK)
{
return err;
}
// Open session to camera
EdsOpenSession(cRef);
// Set object event handler, We need this event handler to retrieve pictures from camera
err = EdsSetObjectEventHandler(cRef, ObjectEvent_All, ObjectEventHandler, IntPtr.Zero);
if (err != EDS_ERR_OK)
{
return err;
}
// We don't want to save pictures to the camera so lets set save target to host
err = EdsSetPropertyData(cRef, PropID_SaveTo, 0, 4, 2);
return err;
}
// uninitilizes edsdk
public uint Uninitilize()
{
uint err;
err = EdsCloseSession(cRef);
if (err != EDS_ERR_OK)
{
return err;
}
err = EdsTerminateSDK();
return err;
}
// gets the first camera to cRef
private uint GetFirstCamera()
{
// Variable initilazions
IntPtr cameraList;
uint err;
int count;
// Get list of cameras;
err = EdsGetCameraList(out cameraList);
if (err != EDS_ERR_OK)
{
return err;
}
// Get count of cameras in list
err = EdsGetChildCount(cameraList, out count);
if (err != EDS_ERR_OK)
{
return err;
}
if (count == 0)
{
return EDS_ERR_DEVICE_NOT_FOUND;
}
// Get first camera to public cRef
err = EdsGetChildAtIndex(cameraList, 0, out cRef);
if (err != EDS_ERR_OK)
{
return err;
}
// release camera list
if (cameraList != null)
{
EdsRelease(cameraList);
}
// everything went just fine
return EDS_ERR_OK;
}
public uint ObjectEventHandler(uint inEvent, IntPtr inRef, IntPtr inContext){
switch (inEvent)
{
// in case of a download request
case ObjectEvent_DirItemRequestTransfer:
DownloadImage(inRef);
break;
default:
break;
}
return EDS_ERR_OK;
}
// Downloads the picture from camera's buffer to the computer
private uint DownloadImage(IntPtr dItem)
{
EdsDirectoryItemInfo dirInfo;
uint err;
IntPtr stream = new IntPtr();
err = EdsGetDirectoryItemInfo(dItem, out dirInfo);
if (err == EDS_ERR_OK)
{
err = EdsCreateFileStream(dirInfo.szFileName, EdsFileCreateDisposition.CreateAlways, EdsAccess.ReadWrite, out stream);
}
if (err == EDS_ERR_OK)
{
err = EdsDownload(dItem, dirInfo.Size, stream);
}
if (err == EDS_ERR_OK)
{
err = EdsDownloadComplete(dItem);
}
if (stream != null)
{
EdsRelease(stream);
}
return err;
}
// Takes picture
public uint TakePicture()
{
return EdsSendCommand(cRef, CameraCommand_TakePicture, 0);
}
}
}