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<concept id="GUID-EA9D7B60-C4EA-5D29-9296-3E4C8B973F59" xml:lang="en"><title>MTP

Data Providers Overview</title><prolog><metadata><keywords/></metadata></prolog><conbody>

<p>MTP data providers act as a storage management layer for specific media

data formats. They are responsible for storing and retrieving media data objects

and the metadata related to those objects on request by the MTP framework. </p>

<section id="GUID-62C1AA63-9C6B-4A39-BFAC-E2E97C0602A6"><title>Architecture</title> <p>MTP

data providers are implemented as ECom plug-ins loaded into the MTP framework.

They interact with the MTP framework using the MTP Data Provider API. For

more information about the MTP architecture, refer to <xref href="GUID-F1DD8800-389C-5A88-A5EB-138359EF7DC5.dita">MTP

Framework Overview</xref>. </p> </section>

<section id="GUID-70570F1A-C430-43B0-AE1B-7FBC9963A4AE"><title>Description</title> <p>Data

provider plug-ins can be built into the ROM or installed by means of SIS files

without reflashing the firmware. </p> <p>The Symbian MTP solution is implemented

as a single-threaded server process which is referred to as a daemon. Each

time an MTP client application starts the daemon for MTP services, the data

provider loading mechanism uses the ECOM framework to list all of the registered

MTP data providers from ROM and non-ROM drives. The data providers are then

loaded from the appropriate directory based on the registration information. </p> </section>

<section id="GUID-91F7D401-1EEA-4779-A905-ABE35019A765"><title>Components</title> <p>The

Symbian platform provides the following data providers. The MTP Data Provider

API enables device creators to create additional data provider plug-ins to

support specific media and data types. </p> <ul>

<li id="GUID-7F4BF99E-85A5-5CAA-BC76-52A2C6B7040D"><p> <b>The Device Data

Provider</b> is built into the MTP Framework. It provides device-related function

such as getting device properties. </p> </li>

<li id="GUID-5C0B8802-6814-5709-9216-ABD50E37F9DD"><p> <b>The Proxy Data Provider</b> is

built into the MTP Framework. It is a special data provider which coordinates

other data providers and the MTP framework. It provides routing mechanisms

to select the right data provider(s) for some operation requests. </p> </li>

<li id="GUID-67C1D059-CF9E-5ADB-B860-72BB5A0C715F"><p> <b>The File Data Provider</b> communicates

with Windows file explorer. It enables the PC to display and manipulate the

device's public file system. For a list of the supported properties, see <xref href="GUID-103DBC39-CD6A-5632-AA21-88C3DD489B51.dita">Properties Supported by File

Data Provider</xref>. </p> </li>

<li id="GUID-EAF24AE2-C3FD-5B77-8362-D72F8D43BE46"><p> <b>The Image Data Provider</b> enables

transfer of images between a Symbian device and a Windows 7 PC. It supports

the EXIF/JPEG (<codeph>0x3801</codeph>) image file format. Image files with

the extensions <codeph>.jpg</codeph> and <codeph>.jpeg</codeph> are supported

by the data provider. </p> <p>The Image Data Provider supports certain image-related

properties. For a list of the supported properties, see <xref href="GUID-E7BB398C-5F5B-50F3-BEDD-B787A7455CCF.dita">Properties

Supported by Image Data Provider</xref>. </p> </li>

<li id="GUID-CDBB53AB-F2A5-5936-B82B-6DC47A49338F"><p> <b>The Pictbridge Data

Provider</b> enables printing of JPEG/JPG images stored on a Symbian device

directly to a <xref href="http://www.cipa.jp/english/pictbridge/" scope="external">Pictbridge</xref> capable

printer by USB connection. Device creators can decide whether to include or

exclude this data provider in the ROM image at build time. To include this

data provider in the ROM image, enable the <codeph>__USB_PICTBRIDGE</codeph> flag. </p> <p>The

object properties supported by this data provider are listed in <xref href="GUID-202477C2-8E6B-5848-B419-59F1AE8C197F.dita">Properties

Supported by Pictbridge Data Provider</xref>. </p> </li>

</ul><note> The MTP framework manages transport connections to enable communication

between the Symbian device and the PC depending on the type of data provider.

Three are modes of MTP transport supported: USB, Bluetooth and PTP-IP. For

details of these transport modes, see <xref href="GUID-8F5FAFAB-545A-5BF0-A3B5-6499F2D1AAD0.dita">MTP

Transports Overview</xref>.</note> </section>

<section id="GUID-5EA4D604-253F-4A0A-8334-20E224F06202"><title>Using MTP Data

Providers</title> <p>The MTP Framework manages data providers and loads specific

data provider plug-in(s) to handle various MTP operations and requests. </p> </section>