Emilis Armonas. About. These APIs were new in Windows Vista and are not available in earlier versions of Windows. .. The core audio APIs provide the means for audio applications to access audio endpoint devices such as headphones and microphones.
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Core Audio API
Presentation on theme: "Core Audio API"— Presentation transcript:
Core Audio API
These APIs were new in Windows Vista and are not available in earlier versions of Windows
The core audio APIs provide the means for audio applications to access audio endpoint devices such as headphones and microphones
The core audio APIs serve as the foundation for higher-level audio APIs such as Microsoft DirectSound and the Windows multimedia
Most applications communicate with the higher-level APIs, but some applications with special requirements might need to communicate directly with the core audio APIs.Slide3
of particular system-wide roles
abstraction of the audio endpoint
Main Core Audio
Multimedia Device (MMDevice) API.
use this API to enumerate the audio endpoint devices in the system.
Windows Audio Session API (WASAPI).
Clients use this API to create and manage audio streams to and from audio endpoint devices.
use this API to directly access the topological features (for example, volume controls and multiplexers) that lie along the data paths inside hardware devices in audio adapters.
use this API to directly access the volume controls on audio endpoint devices. This API is primarily used by applications that manage exclusive-mode audio streams.Slide6
Multimedia Device (MMDevice) API
The Windows Multimedia Device (
) API enables audio clients to discover
audio endpoint device
determine their capabilities, and create driver instances for those devices
Windows Audio Session API (WASAPI
The Windows Audio Session API (WASAPI) enables client applications to manage the flow of audio data between the application and
audio endpoint device.
Through the session abstraction, a WASAPI client can identify an audio stream as a member of a group of related audio
system can manage all of the streams in the session as a single unit.Slide8
API provides client applications with the ability to traverse the functional hardware topologies of audio rendering and capture
the interfaces and methods in the
API, clients can discover the functional subunits (for example, volume control) that lie along the data paths that lead to and from
audio enpoints devices
can traverse the internal topologies of both audio adapter devices and audio endpoint devices and step across the connections that link one device to anotherSlide9
API enables specialized clients to control and monitor the volume levels
audio endpoint devices.
use of the
API can interfere with Windows audio policy and disrupt the user's system volume settings.Slide10
Thanks for your
Core Audio API - Description
Emilis Armonas About These APIs were new in Windows Vista and are not available in earlier versions of Windows The core audio APIs provide the means for audio applications to access audio endpoint devices such as headphones and microphones ID: 569493 Download Presentation
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