MMAL_PARAMETER_AUDIO_LATENCY_TARGET_T Struct Reference

#include <mmal_parameters_audio.h>

Public Attributes
MMAL_PARAMETER_HEADER_T	hdr
MMAL_BOOL_T	enable
uint32_t	filter
uint32_t	target
uint32_t	shift
int32_t	speed_factor
int32_t	inter_factor
int32_t	adj_cap

Detailed Description

Audio latency target to maintain. These settings are used to adjust the clock speed in order to match the measured audio latency to a specified value.

Member Data Documentation

int32_t MMAL_PARAMETER_AUDIO_LATENCY_TARGET_T::adj_cap

limit for speed change before nSpeedFactor is applied, good value: 100

MMAL_BOOL_T MMAL_PARAMETER_AUDIO_LATENCY_TARGET_T::enable

whether this mode is enabled

uint32_t MMAL_PARAMETER_AUDIO_LATENCY_TARGET_T::filter

number of latency samples to filter on, good value: 1

int32_t MMAL_PARAMETER_AUDIO_LATENCY_TARGET_T::inter_factor

divider for comparing latency versus gradiant, good value: 300

uint32_t MMAL_PARAMETER_AUDIO_LATENCY_TARGET_T::shift

shift for storing latency values, good value: 7

int32_t MMAL_PARAMETER_AUDIO_LATENCY_TARGET_T::speed_factor

multiplier for speed changes, in 24.8 format, good value: 256-512

uint32_t MMAL_PARAMETER_AUDIO_LATENCY_TARGET_T::target

target latency (microseconds)

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

• /Volumes/WORK_IN_PROGRESS/RASPBERRY_PI/github/firmware-master/opt/vc/include/interface/mmal/mmal_parameters_audio.h