uac_opts Struct Reference

UAC1 configuration: microphone source + speaker sink callbacks. More...

#include <classes/uac.h>

Data Fields
int(*	mic_source )(void *user, uint8_t *buf, int frames, uint32_t index)
	Microphone source (optional).
void(*	spk_sink )(void *user, const uint8_t *data, int len)
	Speaker sink (optional).
void(*	on_event )(void *user, const char *text)
	Human-readable log hook (optional).
void *	user
	Opaque pointer passed to the callbacks above.

Detailed Description

UAC1 configuration: microphone source + speaker sink callbacks.

Field Documentation

mic_source

int(* uac_opts::mic_source) (void *user, uint8_t *buf, int frames, uint32_t index)

Microphone source (optional).

Fill buf with mono 16-bit-LE capture samples; return < 0 to use the built-in 440 Hz synthetic tone.

Parameters

user	the user pointer.
buf	output buffer (frames × 2 bytes).
frames	number of mono samples requested.
index	running mono-sample counter (the phase origin).

Returns

bytes written, or < 0 for the built-in tone.

spk_sink

void(* uac_opts::spk_sink) (void *user, const uint8_t *data, int len)

Speaker sink (optional).

Receives stereo 16-bit-LE playback audio the host pushed to the speaker (once per isochronous OUT transfer).

Parameters

user	the user pointer.
data	the PCM bytes.
len	number of bytes in data.

on_event

void(* uac_opts::on_event) (void *user, const char *text)

Human-readable log hook (optional).

Parameters

user	the user pointer.
text	a NUL-terminated description.

user

void* uac_opts::user

Opaque pointer passed to the callbacks above.

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The documentation for this struct was generated from the following file:

• classes/uac.h