fuchsia.ultrasound

PROTOCOLS

Factory

Defined in fuchsia.ultrasound/factory.fidl

CreateCapturer

Creates a new fuchsia.media.AudioCapturer that is capable of capturing audio in the ultrasonic frequency range.

The capturer will be suitible for capturing audio at ultrasound frequencies. The channelization and sample rate of the capturer will be fixed to whatever the underlying device is configured for. The fuchsia.media.AudioSampleFormat will be FLOAT.

See fuchsia.media.AudioCore for more information on the operation of a fuchsia.media.AudioCapturer, with the following differences:

• SetUsage is disallowed. Ultrasound capturers do not have an associated fuchsia.media.AudioCaptureUsage.

• BindGainControl is disallowed. Ultrasound capturers will always have unity gain.

• SetPcmStreamType is disallowed. The stream type of an ultrasound capturer is not configurable, but instead returned from CreateCapturer.

• SetReferenceClock is disallowed. The reference clock of an ultrasound capturer is not configurable, but instead returned from CreateCapturer.

Request

Name	Type
request	server_end:fuchsia.media/AudioCapturer

Response

Name	Type
reference_clock	handle<clock>
stream_type	fuchsia.media/AudioStreamType

CreateRenderer

Creates a new fuchsia.media.AudioRenderer that is capable of producing audio in the ultrasonic frequency range.

The renderer will be suitible for producing audio at ultrasound frequencies. The channelization and sample rate of the renderer will be fixed to whatever the underlying device is configured for. The fuchsia.media.AudioSampleFormat will be FLOAT.

See fuchsia.media.AudioCore for more information on the operation of a fuchsia.media.AudioRenderer, with the following differences:

• SetUsage is disallowed. Ultrasound renderers do not have an associated fuchsia.media.AudioRenderUsage.

• BindGainControl is disallowed. Ultrasound renderers will always have unity gain.

• SetPcmStreamType is disallowed. The stream type of an ultrasound renderer is not configurable, but instead returned from CreateRenderer.

• SetReferenceClock is disallowed. The reference clock of an ultrasound renderer is not configurable, but instead returned from CreateRenderer.

Request

Name	Type
renderer	server_end:fuchsia.media/AudioRenderer

Response

Name	Type
reference_clock	handle<clock>
stream_type	fuchsia.media/AudioStreamType