Image acquisition device virtualization for remote computing
Methods and systems for image acquisition device virtualization are described herein. A user of a client computing device may access a remote operating system running on a host computing device via a client application running on a local operating system of the client computing device. An image acquisition device such as a scanner may be connected to the client computing device and the user may wish to use the image acquisition device to acquire image data (e.g., scan a photograph). In order for an image application (e.g., a photo editor) running on the remote operating system to read in the image data from the image acquisition devices, the remote operating system of the host computing device may intercept a service call from the image application at a service layer and redirect the service call, via a virtual channel, to the local operating system of the client computing device.
1. A method comprising:
creating, at an image acquisition service layer of a remote operating system associated with a host computing device, an object that mimics functionality of an image acquisition service layer object that is native to the remote operating system;
receiving, by the object and from an image application running on the remote operating system, a service call;
sending, by the object and to a client application running on a local operating system of a client computing device, the service call;
receiving, by the object and in response to the service call, data from the client application;
storing the data in a local cache of the host computing device; and
sending, by the object and to the image application, the data.
2. The method of claim 1 , wherein the object is a component object model (COM) object.
3. The method of claim 1 , further comprising:
receiving, by the object and from the image application, a subsequent service call; and
in response to the subsequent service call, sending, by the object and to the image application, the data stored in the local cache.
4. The method of claim 1 , wherein the object comprises a virtual device manager object, and wherein the image acquisition service layer object comprises a native device manager object of the host computing device.
5. The method of claim 1 , further comprising:
installing, in the remote operating system, a hook;
intercepting, by the hook, a request, sent by the image application, for an instance of the image acquisition service layer object; and
sending, by the hook and to the image application, an indication of the object.
6. The method of claim 5 , wherein the request comprises a requested interface identifier, and
wherein the intercepting the request comprises comparing the requested interface identifier with a known interface identifier of the image acquisition service layer object of the remote operating system.
7. The method of claim 1 , wherein the service call comprises a request for at least one of:
enumerating one or more image acquisition devices associated with the client computing device,
reading or writing a device property associated with the one or more image acquisition devices,
acquiring image data via the one or more image acquisition devices, or
transferring the image data.
8. The method of claim 7 , wherein the one or more image acquisition devices comprise at least one of a scanner, a camera, a fax machine, an imaging device, a memory card reader, image storage, a photo library, or a storage medium.
9. The method of claim 1 , further comprising establishing, over a network, a virtual channel between the object and the client application,
wherein the sending the service call comprises sending the service call via the virtual channel.
10. The method of claim 1 , wherein the client application is configured to replay the received service call in the local operating system of the client computing device.
11. The method of claim 1 , further comprising: receiving, by the object and from the client application, a signal to launch the image application, wherein the signal is triggered by a button press on an image acquisition device associated with the client computing device.
12. The method of claim 1 , wherein the remote operating system is different from the local operating system, and
wherein the sending the service call comprises:
translating the service call according into a translated service call that is compatible with the local operating system; and
sending the translated service call to the client application.
13. An apparatus comprising:
local cache memory;
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the apparatus to:
create, at an image acquisition service layer of a remote operating system associated with the apparatus, an object that mimics a functionality of an image acquisition service layer object that is native to the remote operating system;
receive, by the object and from an image application running on the remote operating system, a service call;
send, by the object and to a client application running on a local operating system of a client computing device, the service call;
receive, by the object and in response to the service call, data from the client application;
store the data in the local cache memory; and
send, by the object and to the image application, the data.
14. The apparatus of claim 13 , wherein the object is a component object model (COM) object.
15. The apparatus of claim 13 , wherein the instructions, when executed by the one or more processors, cause the apparatus to:
install, in the remote operating system, a hook;
intercept, by the hook, a request, sent by the image application, for an instance of the image acquisition service layer object; and
send, by the hook and to the image application, an indication of the object.
16. The apparatus of claim 13 , wherein the service call comprises a request for at least one of:
enumerating one or more image acquisition devices associated with the client computing device,
reading or writing a device property associated with the one or more image acquisition devices,
acquiring image data via the one or more image acquisition devices, or
transferring the image data, and
wherein the one or more image acquisition devices comprise at least one of a scanner, a camera, a fax machine, an imaging device, a memory card reader, or a storage medium.
17. A non-transitory computer-readable medium storing instructions that, when executed, cause a host computing device to:
create, at an image acquisition service layer of a remote operating system associated with the host computing device, an object that mimics a functionality of an image acquisition service layer object that is native to the remote operating system;
receive, by the object and from an image application running on the remote operating system, a service call;
send, by the object and to a client application running on a local operating system of a client computing device, the service call;
receive, by the object and in response to the service call, data from the client application;
store the data in a local cache of the host computing device; and
send, by the object and to the image application, the data.
18. The non-transitory computer-readable medium of claim 17 , wherein the instructions, when executed, cause the host computing device to:
install, in the remote operating system, a hook;
intercept, by the hook, a request, sent by the image application, for an instance of the image acquisition service layer object; and
send, by the hook and to the image application, an indication of the object.
19. The non-transitory computer-readable medium of claim 17 , wherein the service call comprises a request for at least one of:
enumerating one or more image acquisition devices associated with the client computing device,
reading or writing a device property associated with the one or more image acquisition devices,
acquiring image data via the one or more image acquisition devices, or
transferring the image data.
20. The non-transitory computer-readable medium of claim 19 , wherein the one or more image acquisition devices comprise at least one of a scanner, a camera, a fax machine, an imaging device, a memory card reader, or a storage medium.