Microsoft Technology Licensing, LLC

Cheng-mean Liu

Frank Dominic Yerrace

Elliot H Omiya

Noel Richard Cross

Daniel J Sisolak

Kristin Condit

Adeel Aslam

Catherine Werner

Nicholas J Benson

An off-host audio engine interface exposes audio processing capabilities to a host. The interface receives offloaded audio streams and a host-processed audio stream from the host. The off-host audio engine processes the offloaded audio streams individually to create off-host-processed audio streams. The host-processed audio stream is mixed with the off-host-processed streams to create a mixed stream. The mixed stream undergoes audio processing by the off-host engine. The off-host audio engine provides output and reference audio streams based on the mixed audio stream. The reference stream can be provided to the host via the interface. Via the interface, the host can control local and global audio processing performed by the off-host engine by enabling or disabling local and global processing, and by enabling or disabling local and global audio processing components of the off-host audio engine.

Exposing off-host audio processing capabilities

The driving of an audio device that supports two or more audio modes is accomplished by associating a first physical device object of an audio device with a first device identifier, the first physical device object representing a first audio mode enumerated by a bus enumerator; associating a second physical device object of an audio device with a second device identifier, the second physical device object representing a second audio mode enumerated by the bus enumerator; and if the first device identifier matches the second device identifier, enabling a coupled kernel streaming audio interface compatible with both the first physical device object and the second physical device object.

Exposing multi-mode audio device as a single coherent audio device

Systems and methods for parsing flexible audio codec topologies are described. In one aspect, codec topology information is obtained from an audio codec. The codec topology information includes a list of processing node connections and configuration default data for respective processing nodes associated with the audio codec. The codec topology information is evaluated to identify valid audio codec topologies based on set of valid connection path criteria.

Systems and methods for parsing flexible audio codec topologies

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Cheng-mean Liu