QnxSndHelpers Namespace Reference

Classes
class	WakePipe
struct	HintsDeleter
struct	PcmOpenConfig
struct	PcmOpenResult

Typedefs
using	HintsGuard = std::unique_ptr<void *, HintsDeleter>

Enumerations
enum class	PollOutcome { Ready , Woken , Error }

Functions
PollOutcome	pollPcm (snd_pcm_t *handle, const WakePipe &wake)
snd_pcm_format_t	mapSampleFormat (QAudioFormat::SampleFormat) noexcept
int	recoverFromXrun (snd_pcm_t *handle, int err)
int	startPcm (snd_pcm_t *handle)
void	setWorkerRealtimePriority (const QLoggingCategory &category)
PcmOpenResult	openConfiguredPcm (const PcmOpenConfig &config)

Variables
constexpr int	kSuspendResumeRetryLimit = 5
constexpr std::chrono::milliseconds	kSuspendResumeRetryDelay { 100 }
constexpr unsigned	kDefaultPeriodCount = 3
constexpr unsigned	kMinPeriodCount = 2
constexpr unsigned	kMaxPeriodCount = 16
constexpr snd_pcm_uframes_t	kDefaultPeriodFrames = 1024
constexpr int	kMinWorkerPriority = 11
constexpr int	kMaxWorkerPriority = 23
constexpr int	kDefaultWorkerPriority = 20

Typedef Documentation

HintsGuard

using QnxSndHelpers::HintsGuard = std::unique_ptr<void *, HintsDeleter>

Definition at line 96 of file qqnxsndhelpers_p.h.

Enumeration Type Documentation

PollOutcome

enum class QnxSndHelpers::PollOutcome

strong

Enumerator
Ready
Woken
Error

Definition at line 84 of file qqnxsndhelpers_p.h.

Function Documentation

mapSampleFormat()

snd_pcm_format_t QnxSndHelpers::mapSampleFormat ( QAudioFormat::SampleFormat fmt )

noexcept

Definition at line 121 of file qqnxsndhelpers.cpp.

openConfiguredPcm()

PcmOpenResult QnxSndHelpers::openConfiguredPcm

(

const PcmOpenConfig &

config

)

Definition at line 284 of file qqnxsndhelpers.cpp.

References QnxSndHelpers::PcmOpenResult::bufferFrames, QnxSndHelpers::PcmOpenConfig::direction, QnxSndHelpers::PcmOpenResult::handle, kDefaultPeriodFrames, QnxSndHelpers::PcmOpenResult::periodFrames, and QnxSndHelpers::PcmOpenConfig::streamLabel.

pollPcm()

PollOutcome QnxSndHelpers::pollPcm	(	snd_pcm_t *	handle,
		const WakePipe &	wake )

Definition at line 78 of file qqnxsndhelpers.cpp.

References QnxSndHelpers::WakePipe::drain(), Error, QnxSndHelpers::WakePipe::readFd(), Ready, and Woken.

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recoverFromXrun()

int QnxSndHelpers::recoverFromXrun	(	snd_pcm_t *	handle,
		int	err )

Definition at line 203 of file qqnxsndhelpers.cpp.

References kSuspendResumeRetryLimit.

setWorkerRealtimePriority()

void QnxSndHelpers::setWorkerRealtimePriority

(

const QLoggingCategory &

category

)

Definition at line 256 of file qqnxsndhelpers.cpp.

References kDefaultWorkerPriority, kMaxWorkerPriority, and kMinWorkerPriority.

startPcm()

int QnxSndHelpers::startPcm

(

snd_pcm_t *

handle

)

Definition at line 245 of file qqnxsndhelpers.cpp.

Variable Documentation

kDefaultPeriodCount

unsigned QnxSndHelpers::kDefaultPeriodCount = 3

inlineconstexpr

Definition at line 41 of file qqnxsndhelpers_p.h.

kDefaultPeriodFrames

snd_pcm_uframes_t QnxSndHelpers::kDefaultPeriodFrames = 1024

inlineconstexpr

Definition at line 47 of file qqnxsndhelpers_p.h.

Referenced by openConfiguredPcm().

kDefaultWorkerPriority

int QnxSndHelpers::kDefaultWorkerPriority = 20

inlineconstexpr

Definition at line 55 of file qqnxsndhelpers_p.h.

Referenced by setWorkerRealtimePriority().

kMaxPeriodCount

unsigned QnxSndHelpers::kMaxPeriodCount = 16

inlineconstexpr

Definition at line 44 of file qqnxsndhelpers_p.h.

kMaxWorkerPriority

int QnxSndHelpers::kMaxWorkerPriority = 23

inlineconstexpr

Definition at line 54 of file qqnxsndhelpers_p.h.

Referenced by setWorkerRealtimePriority().

kMinPeriodCount

unsigned QnxSndHelpers::kMinPeriodCount = 2

inlineconstexpr

Definition at line 43 of file qqnxsndhelpers_p.h.

kMinWorkerPriority

int QnxSndHelpers::kMinWorkerPriority = 11

inlineconstexpr

Definition at line 53 of file qqnxsndhelpers_p.h.

Referenced by setWorkerRealtimePriority().

kSuspendResumeRetryDelay

std::chrono::milliseconds QnxSndHelpers::kSuspendResumeRetryDelay { 100 }

inlineconstexpr

Definition at line 38 of file qqnxsndhelpers_p.h.

kSuspendResumeRetryLimit

int QnxSndHelpers::kSuspendResumeRetryLimit = 5

inlineconstexpr

Definition at line 36 of file qqnxsndhelpers_p.h.

Referenced by recoverFromXrun().