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Using streaming CAF

The Streaming Content Access Framework (CAF) provides a common interface for applications to access streamed data. This section describes how streaming CAF is used by a streaming player middleware such as MMF controller to view and access the key stream.

Introduction

The streaming CAF identifies a suitable streaming agent, such as IPSec for accessing the protected broadcast. The streaming agent decrypts the short-term key message and uses it to decrypt the data. The streaming player middleware initializes a key stream decoder for decoding a protected key stream. It is implemented as a separate ECom plug-in. For more information, see CAF Streaming Support Overview

The streaming CAF is used to perform the following tasks:

For more information about processing of a streaming session, see also Streaming Session Sequence diagram.

Error Handling
The streaming player middleware (the multimedia controller) must be made aware, when a stream cannot be played because of lack of rights. In a regular file DRM standard scenario, this task is relatively easy, as the CAF agent checks whether corresponding rights exist, during instantiation of ContentAccess::CData.
Processing Key Stream
The CKeyStreamDecoder class provides an interface for initializing key stream decoders and process a key stream.

Parent topic: CAF Streaming Support Tutorials