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PORetrieving pictures from Canon camera using EDSDK 2.9
 

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  1. PORetrieving pictures from Canon camera using EDSDK 2.9
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    <p>I been trying to retrieve images taken on the camera for a very long time now. I am able to take pictures with the SDK using:</p> <p>err = EDSDK.EdsSendCommand(cameraDev, EDSDK.CameraCommand_TakePicture, 0);</p> <p>I do this after opening a valid camera session. I have also added a </p> <p>objectEventHandler and a stateEventHandler for the events that look like:</p> <pre><code> public static uint stateEventHandler(uint inEvent, uint inParameter, IntPtr inContext) { switch (inEvent) { case EDSDK.StateEvent_JobStatusChanged: Debug.WriteLine(String.Format("There are objects waiting to be transferred. Job status {0}", inParameter)); break; case EDSDK.StateEvent_ShutDownTimerUpdate: if (inParameter != 0) Debug.WriteLine(String.Format("shutdown timer update: {0}", inParameter)); break; default: Debug.WriteLine(String.Format("StateEventHandler: event {0}, parameter {1}", inEvent, inParameter)); break; } return 0; } </code></pre> <hr> <pre><code> public static uint objectEventHandler(uint inEvent, IntPtr inRef, IntPtr inContext) { switch (inEvent) { case EDSDK.ObjectEvent_VolumeInfoChanged: Debug.WriteLine("volume info changed"); #region retrieve volume info EDSDK.EdsVolumeInfo volumeInfo; err = EDSDK.EdsGetVolumeInfo(inRef, out volumeInfo); if (err == EDSDK.EDS_ERR_OK) { switch (volumeInfo.StorageType) { case (uint)EDSDK.EdsStorageType.Non: Debug.WriteLine("No card inserted"); break; default: case (uint)EDSDK.EdsStorageType.CF: case (uint)EDSDK.EdsStorageType.SD: if (volumeInfo.Access == (uint)EDSDK.EdsAccess.ReadWrite) { Debug.WriteLine(String.Format("Label: {0}, Max Capacity: {1}, Free Space: {2}", volumeInfo.szVolumeLabel, volumeInfo.MaxCapacity, volumeInfo.FreeSpaceInBytes)); /* err = EDSDK.EdsGetChildAtIndex(volumeInfo, 0, directoryList); if (err != EDSDK.EDS_ERR_OK) throw new Exception(String.Format("EdsGetChildAtIndex: " + err.ToString())); */ } else Debug.WriteLine(String.Format("Volume access rights: {0}", volumeInfo.Access)); break; } } #endregion retrieve volume info break; case EDSDK.ObjectEvent_DirItemCreated: downloadImage(inContext); Debug.WriteLine("dir item created"); break; default: Debug.WriteLine(String.Format("ObjectEventHandler: event {0}", inEvent)); break; } return 0; } </code></pre> <p>I have tried multiple approaches (to retrieve this image) none of them seem to work. Some of the approaches are:</p> <p><a href="http://tech.groups.yahoo.com/group/CanonSDK/message/1575" rel="nofollow">http://tech.groups.yahoo.com/group/CanonSDK/message/1575</a></p> <p>[http://stackoverflow.com/questions/3762530/take-picture-and-directly-save-image-to-pc-using-edsdk-2-8]</p> <p>[http://canonsdk.com/phpBB3/viewtopic.php?f=7&amp;t=94&amp;sid=7fcbe7ad6eadb399dbcb4b61a7333112]</p> <p>The thing is all of them are just part of the code, when I try to put it in mine, it never works properly.Probably because I am no expert on memoryStreams, pointers an so. Most of the errors I get are when reading the streams and copying them to a local buffer, it says the stream is empty. </p> <p>Does anybody have full sample code for taking a picture and downloading it to disk (or to memory), or the rigth approach that I need in order to complete this?</p> <p>Thanks Fernando</p>
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