Audio Module

Audio and Alsa Interface. More...

Classes
class	cSoftHdAudio
	Audio Interface. More...
class	cPidController
	PID Controller. More...
class	cSoftHdRingbuffer
	Ringbuffer (FIFO) Implementation. More...

Macros
#define	atomic_set(ptr, val)   __atomic_store_n(ptr, val, __ATOMIC_SEQ_CST)
#define	atomic_read(ptr)   __atomic_load_n(ptr, __ATOMIC_SEQ_CST)
#define	atomic_inc(ptr)   __atomic_add_fetch(ptr, 1, __ATOMIC_SEQ_CST)
#define	atomic_dec(ptr)   __atomic_sub_fetch(ptr, 1, __ATOMIC_SEQ_CST)
#define	atomic_add(val, ptr)   __atomic_add_fetch(ptr, val, __ATOMIC_SEQ_CST)
#define	atomic_sub(val, ptr)   __atomic_sub_fetch(ptr, val, __ATOMIC_SEQ_CST)

Typedefs
typedef volatile int	atomic_t
	Atomic Wrapper Macros.

Functions
static void	ReorderAudioFrame (uint16_t *buf, int size, int channels)
	Reorder audio frame.
static void	AlsaNoopCallback (__attribute__((unused)) const char *file, __attribute__((unused)) int line, __attribute__((unused)) const char *function, __attribute__((unused)) int err, __attribute__((unused)) const char *fmt,...)
	Empty log callback.
	cSoftHdAudio::cSoftHdAudio (cSoftHdDevice *)
	Create a new audio context.
void	cSoftHdAudio::Normalize (uint16_t *, int)
	Normalize audio samples.
void	cSoftHdAudio::Compress (uint16_t *, int)
	Compress audio samples.
void	cSoftHdAudio::SoftAmplify (int16_t *, int)
	Amplify the samples in software.
void	cSoftHdAudio::SetEq (int[18], int)
	Set equalizer bands.
int	cSoftHdAudio::InitFilter (AVCodecContext *)
	Init audio filters.
void	cSoftHdAudio::DropSamplesOlderThanPtsMs (int64_t)
	Drop samples older than the given PTS.
void	cSoftHdAudio::EnqueueFrame (AVFrame *)
	Place samples in audio output queue.
void	cSoftHdAudio::BuildPauseBurst (void)
	Build a pause spdif burst with the size of the last recognized normal spdif audio.
void	cSoftHdAudio::EnqueueSpdif (uint16_t *, int, AVFrame *)
	Enqueue prepared spdif bursts in audio output queue.
void	cSoftHdAudio::Enqueue (uint16_t *, int, AVFrame *)
	Send audio data to ringbuffer.
int	cSoftHdAudio::Setup (AVCodecContext *, int, int, int)
	Alsa setup wrapper.
AVFrame *	cSoftHdAudio::FilterGetFrame (void)
	Get frame from filter sink.
int	cSoftHdAudio::CheckForFilterReady (AVCodecContext *)
	Check if the filter has changed and is ready, init the filter if needed.
void	cSoftHdAudio::Filter (AVFrame *, AVCodecContext *)
	Send audio frame to filter and enqueue it.
void	cSoftHdAudio::FlushBuffers (void)
	Flush audio buffers.
int	cSoftHdAudio::GetUsedBytes (void)
	Get used bytes in audio ringbuffer.
int64_t	cSoftHdAudio::GetOutputPtsMs (void)
	Get the output PTS of the ringbuffer.
int64_t	cSoftHdAudio::GetOutputPtsMsInternal (void)
int64_t	cSoftHdAudio::GetHardwareOutputPtsMs (void)
	Get the hardware output PTS in milliseconds.
int64_t	cSoftHdAudio::GetHardwareOutputDelayMs (void)
	Get the hardware delay in milliseconds.
int64_t	cSoftHdAudio::GetHardwareOutputPtsTimebaseUnits (void)
	Get the hardware output PTS in timebase units.
void	cSoftHdAudio::SetVolume (int)
	Set mixer volume (0-1000)
void	cSoftHdAudio::SetPaused (bool)
	Set audio playback pause state.
void	cSoftHdAudio::SetNormalize (bool, int)
	Set normalize volume parameters.
void	cSoftHdAudio::SetCompression (bool, int)
	Set volume compression parameters.
void	cSoftHdAudio::SetStereoDescent (int)
	Set stereo loudness descent.
void	cSoftHdAudio::SetPassthroughMask (int)
	Set audio passthrough mask.
void	cSoftHdAudio::LazyInit (void)
	Initialize audio output module (alsa)
void	cSoftHdAudio::Exit (void)
	Cleanup audio output module (alsa)
void	cSoftHdAudio::HandleError (int)
	Handle an alsa error.
void	cSoftHdAudio::FlushAlsaBuffers (void)
	Flush alsa buffers.
void	cSoftHdAudio::DropAlsaBuffers (void)
	Drop alsa buffers.
void	cSoftHdAudio::FlushAlsaBuffersInternal (bool)
	Flush alsa buffers internally.
virtual void	cSoftHdAudio::Action (void)
	Audio thread loop, started with Start().
void	cSoftHdAudio::Stop (void)
	Stop the thread.
bool	cSoftHdAudio::CyclicCall (void)
	Cyclic audio playback call.
bool	cSoftHdAudio::SendAudio (int)
	Write regular audio data from the ringbuffer to the hardware.
bool	cSoftHdAudio::SendPause (void)
	Write pause to passthrough device.
void	cSoftHdAudio::SetHwDelayBaseline (void)
	Set the hw delay baseline.
void	cSoftHdAudio::ResetHwDelayBaseline (void)
	Reset the hw delay baseline.
void	cSoftHdAudio::ProcessEvents (void)
	Process queued events and forward them to event receiver.
char *	cSoftHdAudio::OpenAlsaDevice (const char *, int)
	Opens an alsa device.
char *	cSoftHdAudio::FindAlsaDevice (const char *, const char *, int)
	Find alsa device giving some search hints.
void	cSoftHdAudio::AlsaInitPCMDevice (void)
	Search for an alsa pcm device and open it.
void	cSoftHdAudio::AlsaInitMixer (void)
	Initialize alsa mixer.
void	cSoftHdAudio::AlsaSetVolume (int)
	Set alsa mixer volume (0-1000)
int	cSoftHdAudio::AlsaSetup (int channels, int sample_rate, int passthrough)
	Setup alsa audio for requested format.
void	cSoftHdAudio::AlsaInit (void)
	Initialize the alsa audio output module.
void	cSoftHdAudio::AlsaExit (void)
	Cleanup the alsa audio output module.
void	cSoftHdAudio::ClockDriftCompensation (void)
	Calculate clock drift compensation.
	cPidController::cPidController (double, double, double, double)
	Create a PID Controller.
double	cPidController::Update (double, double)
	Calculate the new output value.
void	cPidController::Reset ()
	Reset the internal state (integral sum and error history).
	cSoftHdRingbuffer::cSoftHdRingbuffer (size_t)
	cSoftHdRingbuffer constructor
	cSoftHdRingbuffer::~cSoftHdRingbuffer (void)
	cSoftHdRingbuffer destructor
void	cSoftHdRingbuffer::Reset (void)
	Reset ring buffer pointers.
size_t	cSoftHdRingbuffer::WriteAdvance (size_t)
	Advance write pointer in ring buffer.
size_t	cSoftHdRingbuffer::Write (const void *, size_t)
	Write to a ring buffer.
size_t	cSoftHdRingbuffer::GetWritePointer (void **)
	Get write pointer and free bytes at this position of ring buffer.
size_t	cSoftHdRingbuffer::ReadAdvance (size_t)
	Advance read pointer in ring buffer.
size_t	cSoftHdRingbuffer::Read (void *, size_t)
	Read from a ring buffer.
size_t	cSoftHdRingbuffer::GetReadPointer (const void **)
	Get read pointer and used bytes at this position of ring buffer.
size_t	cSoftHdRingbuffer::FreeBytes (void)
	Get free bytes in ring buffer.
size_t	cSoftHdRingbuffer::UsedBytes (void)
	Get used bytes in ring buffer.

Detailed Description

Audio and Alsa Interface.

This file defines cSoftHdAudio, which holds all functions we need to deal with audio, e.g.handling the audio stream and sending it to hardware.

Macro Definition Documentation

atomic_add

#define atomic_add	(		val,
			ptr
	)		__atomic_add_fetch(ptr, val, __ATOMIC_SEQ_CST)

Definition at line 32 of file ringbuffer.h.

atomic_dec

#define atomic_dec

(

ptr

)

__atomic_sub_fetch(ptr, 1, __ATOMIC_SEQ_CST)

Definition at line 31 of file ringbuffer.h.

atomic_inc

#define atomic_inc

(

ptr

)

__atomic_add_fetch(ptr, 1, __ATOMIC_SEQ_CST)

Definition at line 30 of file ringbuffer.h.

atomic_read

#define atomic_read

(

ptr

)

__atomic_load_n(ptr, __ATOMIC_SEQ_CST)

Definition at line 29 of file ringbuffer.h.

atomic_set

#define atomic_set	(		ptr,
			val
	)		__atomic_store_n(ptr, val, __ATOMIC_SEQ_CST)

Definition at line 28 of file ringbuffer.h.

atomic_sub

#define atomic_sub	(		val,
			ptr
	)		__atomic_sub_fetch(ptr, val, __ATOMIC_SEQ_CST)

Definition at line 33 of file ringbuffer.h.

Typedef Documentation

atomic_t

typedef volatile int atomic_t

Atomic Wrapper Macros.

atomic type, 24 bit useable

Definition at line 26 of file ringbuffer.h.

Function Documentation

Action()

void cSoftHdAudio::Action ( void  )

protectedvirtual

Audio thread loop, started with Start().

Tries to periodically send frames to the hardware and checks for events (underruns)

Definition at line 1199 of file audio.cpp.

References cSoftHdAudio::CyclicCall(), LOGDEBUG, and cSoftHdAudio::ProcessEvents().

AlsaExit()

void cSoftHdAudio::AlsaExit ( void  )

private

Cleanup the alsa audio output module.

Definition at line 1815 of file audio.cpp.

References cSoftHdAudio::m_pAlsaMixer, cSoftHdAudio::m_pAlsaMixerElem, and cSoftHdAudio::m_pAlsaPCMHandle.

Referenced by cSoftHdAudio::Exit().

AlsaInit()

void cSoftHdAudio::AlsaInit ( void  )

private

Initialize the alsa audio output module.

Definition at line 1799 of file audio.cpp.

References cSoftHdAudio::AlsaInitMixer(), cSoftHdAudio::AlsaInitPCMDevice(), and AlsaNoopCallback().

Referenced by cSoftHdAudio::LazyInit().

AlsaInitMixer()

void cSoftHdAudio::AlsaInitMixer ( void  )

private

Initialize alsa mixer.

Definition at line 1607 of file audio.cpp.

References L_SOUND, LOGDEBUG2, LOGERROR, cSoftHdAudio::m_alsaRatio, cSoftHdAudio::m_pAlsaMixer, cSoftHdAudio::m_pAlsaMixerElem, cSoftHdAudio::m_pMixerChannel, and cSoftHdAudio::m_pMixerDevice.

Referenced by cSoftHdAudio::AlsaInit().

AlsaInitPCMDevice()

void cSoftHdAudio::AlsaInitPCMDevice ( void  )

private

Search for an alsa pcm device and open it.

Definition at line 1528 of file audio.cpp.

References cSoftHdAudio::FindAlsaDevice(), L_SOUND, LOGDEBUG2, LOGERROR, LOGFATAL, LOGINFO, LOGWARNING, cSoftHdAudio::m_pAlsaPCMHandle, cSoftHdAudio::m_passthrough, cSoftHdAudio::m_pPassthroughDevice, cSoftHdAudio::m_pPCMDevice, and cSoftHdAudio::OpenAlsaDevice().

Referenced by cSoftHdAudio::AlsaInit().

AlsaNoopCallback()

static void AlsaNoopCallback ( __attribute__((unused)) const char *  file, __attribute__((unused)) int  line, __attribute__((unused)) const char *  function, __attribute__((unused)) int  err, __attribute__((unused)) const char *  fmt,   ...  )

static

Empty log callback.

Definition at line 1787 of file audio.cpp.

Referenced by cSoftHdAudio::AlsaInit().

AlsaSetup()

int cSoftHdAudio::AlsaSetup ( int  channels, int  sample_rate, int  passthrough  )

private

Setup alsa audio for requested format.

Parameters

channels	Channels requested
sample_rate	SampleRate requested
passthrough	use pass-through (AC-3, ...) device

Return values

0	everything ok
-1	something gone wrong

Todo:

FIXME: remove pointer for freq + channels

Definition at line 1683 of file audio.cpp.

References cSoftHdAudio::DropAlsaBuffers(), L_SOUND, LOGDEBUG2, LOGERROR, LOGINFO, LOGWARNING, cSoftHdAudio::m_alsaBufferSizeFrames, cSoftHdAudio::m_alsaUseMmap, cSoftHdAudio::m_downmix, cSoftHdAudio::m_hwNumChannels, cSoftHdAudio::m_hwSampleRate, cSoftHdAudio::m_pAlsaPCMHandle, cSoftHdAudio::MsToFrames(), and cSoftHdAudio::Stop().

Referenced by cSoftHdAudio::InitFilter(), and cSoftHdAudio::Setup().

AlsaSetVolume()

void cSoftHdAudio::AlsaSetVolume ( int  volume )

private

Set alsa mixer volume (0-1000)

Parameters

volume

volume (0 .. 1000)

Definition at line 1661 of file audio.cpp.

References cSoftHdAudio::m_alsaRatio, cSoftHdAudio::m_pAlsaMixer, and cSoftHdAudio::m_pAlsaMixerElem.

Referenced by cSoftHdAudio::SetVolume().

BuildPauseBurst()

void cSoftHdAudio::BuildPauseBurst ( void  )

private

Build a pause spdif burst with the size of the last recognized normal spdif audio.

Definition at line 634 of file audio.cpp.

References IEC61937_NULL, IEC61937_PREAMBLE1, IEC61937_PREAMBLE2, cSoftHdAudio::m_pauseBurst, and cSoftHdAudio::m_spdifBurstSize.

Referenced by cSoftHdAudio::EnqueueSpdif().

CheckForFilterReady()

int cSoftHdAudio::CheckForFilterReady ( AVCodecContext *  ctx )

private

Check if the filter has changed and is ready, init the filter if needed.

Parameters

ctx	AVCodec audio decoding context

Return values

1	error, init failed
0	filter initiated

Definition at line 785 of file audio.cpp.

References cSoftHdAudio::InitFilter(), L_SOUND, LOGDEBUG2, cSoftHdAudio::m_filterChanged, cSoftHdAudio::m_filterReady, and cSoftHdAudio::m_pFilterGraph.

Referenced by cSoftHdAudio::Filter().

ClockDriftCompensation()

void cSoftHdAudio::ClockDriftCompensation

(

void

)

Calculate clock drift compensation.

Uses a PID controller to adjust the playback pitch based on the audio buffer fill level. This keeps the buffer level constant and compensates for clock drift between the sender and the audio hardware.

Also updates the low-pass filter for the buffer fill level.

Definition at line 1837 of file audio.cpp.

References cSoftHdAudio::FramesToMsDouble(), cBufferFillLevelLowPassFilter::GetBufferFillLevelFramesAvg(), cPidController::GetDTerm(), cPidController::GetITerm(), cPidController::GetPTerm(), cPidController::GetTargetValue(), cBufferFillLevelLowPassFilter::IsSettled(), L_SOUND, LOGDEBUG2, LOGWARNING, cSoftHdAudio::m_alsaBufferSizeFrames, cSoftHdAudio::m_fillLevel, cSoftHdAudio::m_lastPidInvocation, cSoftHdAudio::m_packetCounter, cSoftHdAudio::m_pAlsaPCMHandle, cSoftHdAudio::m_passthrough, cSoftHdAudio::m_pidController, cSoftHdAudio::m_pitchPpm, cPidController::SetTargetValue(), cPidController::Update(), and cBufferFillLevelLowPassFilter::UpdateAvgBufferFillLevel().

Referenced by cSoftHdDevice::PlayAudio().

Compress()

void cSoftHdAudio::Compress ( uint16_t *  samples, int  count  )

private

Compress audio samples.

Parameters

samples	sample buffer
count	number of bytes in sample buffer

Definition at line 233 of file audio.cpp.

References L_SOUND, LOGDEBUG2, cSoftHdAudio::m_bytesPerSample, cSoftHdAudio::m_compressionFactor, and cSoftHdAudio::m_compressionMaxFactor.

Referenced by cSoftHdAudio::EnqueueFrame().

cPidController()

cPidController::cPidController	(	double	kp,
		double	ki,
		double	kd,
		double	maxOutput
	)

Create a PID Controller.

Parameters

kp	Proportional gain
ki	Integral gain
kd	Derivative gain
maxOutput	Max allowed output value (absolute)

Definition at line 36 of file pidcontroller.cpp.

References cPidController::integralGain, cPidController::maxIntegral, and cPidController::maxOutput.

cSoftHdAudio()

cSoftHdAudio::cSoftHdAudio

(

cSoftHdDevice *

device

)

Create a new audio context.

Definition at line 61 of file audio.cpp.

References cSoftHdConfig::ConfigAudioCompression, cSoftHdConfig::ConfigAudioEq, cSoftHdConfig::ConfigAudioEqBand, cSoftHdConfig::ConfigAudioMaxCompression, cSoftHdConfig::ConfigAudioMaxNormalize, cSoftHdConfig::ConfigAudioNormalize, cSoftHdConfig::ConfigAudioStereoDescent, cSoftHdAudio::m_pConfig, cSoftHdAudio::SetCompression(), cSoftHdAudio::SetEq(), cSoftHdAudio::SetNormalize(), and cSoftHdAudio::SetStereoDescent().

cSoftHdRingbuffer()

cSoftHdRingbuffer::cSoftHdRingbuffer

(

size_t

size

)

cSoftHdRingbuffer constructor

Init a new ring buffer

Parameters

size	Size of the ring buffer

Definition at line 36 of file ringbuffer.cpp.

References atomic_set, LOGFATAL, cSoftHdRingbuffer::m_filled, cSoftHdRingbuffer::m_pBuffer, cSoftHdRingbuffer::m_pBufferEnd, cSoftHdRingbuffer::m_pReadPointer, and cSoftHdRingbuffer::m_pWritePointer.

CyclicCall()

bool cSoftHdAudio::CyclicCall ( void  )

private

Cyclic audio playback call.

Handles audio output to ALSA, writing samples from the ring buffer to the hardware when space is available.

If passthrough is enabled, the thread continues sending data (pause bursts) even if audio playback is paused. This prevents, that the AV-Receiver looses the lock and may switch to PCM instead.

Returns

true if data was written or the next write should be scheduled immediately

Definition at line 1237 of file audio.cpp.

References cSoftHdAudio::HandleError(), L_SOUND, LOGDEBUG2, LOGERROR, cSoftHdAudio::m_mutex, cSoftHdAudio::m_pAlsaPCMHandle, cSoftHdAudio::m_passthrough, cSoftHdAudio::m_paused, cSoftHdAudio::m_pauseMutex, cSoftHdAudio::m_spdifBurstSize, cSoftHdAudio::SendAudio(), and cSoftHdAudio::SendPause().

Referenced by cSoftHdAudio::Action().

DropAlsaBuffers()

void cSoftHdAudio::DropAlsaBuffers ( void  )

private

Drop alsa buffers.

Definition at line 1134 of file audio.cpp.

References cSoftHdAudio::FlushAlsaBuffersInternal().

Referenced by cSoftHdAudio::AlsaSetup().

DropSamplesOlderThanPtsMs()

void cSoftHdAudio::DropSamplesOlderThanPtsMs

(

int64_t

ptsMs

)

Drop samples older than the given PTS.

Removes audio samples from the ringbuffer that have a presentation timestamp older than the specified ptsMs.

Parameters

ptsMs

presentation timestamp in milliseconds - samples older than this will be dropped

Definition at line 576 of file audio.cpp.

References cSoftHdAudio::GetOutputPtsMsInternal(), cSoftHdAudio::HasInputPts(), L_AV_SYNC, LOGDEBUG2, cSoftHdAudio::m_fillLevel, cSoftHdAudio::m_mutex, cSoftHdAudio::m_pAlsaPCMHandle, cSoftHdAudio::m_pidController, cSoftHdAudio::m_pRingbuffer, cSoftHdAudio::MsToFrames(), cSoftHdRingbuffer::ReadAdvance(), cBufferFillLevelLowPassFilter::Reset(), cPidController::Reset(), Timestamp2String(), cSoftHdRingbuffer::UsedBytes(), and cBufferFillLevelLowPassFilter::WroteFrames().

Referenced by cVideoRender::DisplayFrame(), and cSoftHdDevice::OnEventReceived().

Enqueue()

void cSoftHdAudio::Enqueue ( uint16_t *  buffer, int  count, AVFrame *  frame  )

private

Send audio data to ringbuffer.

Parameters

buffer	data buffer
count	number of bytes in data buffer
frame	decoded frame (used to get frame parameters)

Definition at line 677 of file audio.cpp.

References AV_NOPTS_VALUE, cSoftHdAudio::AV_SYNC_BORDER_MS, L_AV_SYNC, LOGDEBUG2, LOGERROR, cSoftHdAudio::m_eventQueue, cSoftHdAudio::m_fillLevel, cSoftHdAudio::m_inputPts, cSoftHdAudio::m_mutex, cSoftHdAudio::m_pAlsaPCMHandle, cSoftHdAudio::m_pitchAdjustFrameCounter, cSoftHdAudio::m_pitchPpm, cSoftHdAudio::m_pRingbuffer, cSoftHdAudio::PtsToMs(), cBufferFillLevelLowPassFilter::ReceivedFrames(), Timestamp2String(), and cSoftHdRingbuffer::Write().

Referenced by cSoftHdAudio::EnqueueFrame(), and cSoftHdAudio::EnqueueSpdif().

EnqueueFrame()

void cSoftHdAudio::EnqueueFrame ( AVFrame *  frame )

private

Place samples in audio output queue.

Parameters

frame

audio frame

Definition at line 608 of file audio.cpp.

References cSoftHdAudio::Compress(), cSoftHdAudio::Enqueue(), cSoftHdAudio::m_bytesPerSample, cSoftHdAudio::m_compression, cSoftHdAudio::m_normalize, cSoftHdAudio::Normalize(), and ReorderAudioFrame().

Referenced by cSoftHdAudio::Filter().

EnqueueSpdif()

void cSoftHdAudio::EnqueueSpdif	(	uint16_t *	buffer,
		int	count,
		AVFrame *	frame
	)

Enqueue prepared spdif bursts in audio output queue.

Wrapper for Enqueue(), but builds a new pause burst if necessary

Parameters

buffer	data buffer
count	number of bytes in data buffer
frame	decoded frame (used to get frame parameters)

Definition at line 655 of file audio.cpp.

References cSoftHdAudio::BuildPauseBurst(), cSoftHdAudio::Enqueue(), L_SOUND, LOGDEBUG2, cSoftHdAudio::m_pauseBurst, cSoftHdAudio::m_pauseMutex, and cSoftHdAudio::m_spdifBurstSize.

Referenced by cAudioDecoder::DecodePassthrough().

Exit()

void cSoftHdAudio::Exit

(

void

)

Cleanup audio output module (alsa)

This currently also stops the audio thread.

Todo:

Move stopping the thread to AlsaExit()

Definition at line 1090 of file audio.cpp.

References cSoftHdAudio::AlsaExit(), L_SOUND, LOGDEBUG2, cSoftHdAudio::m_initialized, cSoftHdAudio::m_pFilterGraph, and cSoftHdAudio::Stop().

Referenced by cSoftHdDevice::OnEnteringState().

Filter()

void cSoftHdAudio::Filter	(	AVFrame *	inframe,
		AVCodecContext *	ctx
	)

Send audio frame to filter and enqueue it.

Parameters

inframe	incoming audio frame to be filtered
ctx	AVCodec audio decoding context

Return values

1	error, send again
0	running

Definition at line 818 of file audio.cpp.

References cSoftHdAudio::CheckForFilterReady(), cSoftHdAudio::EnqueueFrame(), cSoftHdAudio::FilterGetFrame(), L_SOUND, LOGDEBUG2, LOGERROR, cSoftHdAudio::m_filterChanged, and cSoftHdAudio::m_pBuffersrcCtx.

Referenced by cAudioDecoder::Decode().

FilterGetFrame()

AVFrame * cSoftHdAudio::FilterGetFrame ( void  )

private

Get frame from filter sink.

Returns

pointer to AVFrame if success, NULL otherwise

Definition at line 752 of file audio.cpp.

References LOGERROR, and cSoftHdAudio::m_pBuffersinkCtx.

Referenced by cSoftHdAudio::Filter().

FindAlsaDevice()

char * cSoftHdAudio::FindAlsaDevice ( const char *  devname, const char *  hint, int  passthrough  )

private

Find alsa device giving some search hints.

Parameters

devname	interface identification (e.g. "pcm")
hint	string to compare with device name hints
passthrough	set, if we want a passthrough device

Returns

an opened alsa device name if successful, NULL otherwise NOTE: Returned string is allocated and must be freed by caller

Definition at line 1492 of file audio.cpp.

References LOGWARNING, and cSoftHdAudio::OpenAlsaDevice().

Referenced by cSoftHdAudio::AlsaInitPCMDevice().

FlushAlsaBuffers()

void cSoftHdAudio::FlushAlsaBuffers ( void  )

private

Flush alsa buffers.

Definition at line 1126 of file audio.cpp.

References cSoftHdAudio::FlushAlsaBuffersInternal().

Referenced by cSoftHdAudio::FlushBuffers().

FlushAlsaBuffersInternal()

void cSoftHdAudio::FlushAlsaBuffersInternal ( bool  drop )

private

Flush alsa buffers internally.

Parameters

drop	force a snd_pcm_drop of the audio frames already in the kernel

Definition at line 1144 of file audio.cpp.

References L_SOUND, LOGDEBUG2, LOGERROR, cSoftHdAudio::m_compressionFactor, cSoftHdAudio::m_compressionMaxFactor, cSoftHdAudio::m_normalizeAverage, cSoftHdAudio::m_normalizeCounter, cSoftHdAudio::m_normalizeFactor, cSoftHdAudio::m_normalizeReady, cSoftHdAudio::m_pAlsaPCMHandle, cSoftHdAudio::m_passthrough, and cSoftHdAudio::NORMALIZE_MAX_INDEX.

Referenced by cSoftHdAudio::DropAlsaBuffers(), and cSoftHdAudio::FlushAlsaBuffers().

FlushBuffers()

void cSoftHdAudio::FlushBuffers

(

void

)

Flush audio buffers.

Flush the alsa buffers and reset audio: pts, ringbuffer, pidController, fillLevel

Definition at line 861 of file audio.cpp.

References AV_NOPTS_VALUE, cSoftHdAudio::FlushAlsaBuffers(), L_SOUND, LOGDEBUG2, cSoftHdAudio::m_fillLevel, cSoftHdAudio::m_filterChanged, cSoftHdAudio::m_initialized, cSoftHdAudio::m_inputPts, cSoftHdAudio::m_mutex, cSoftHdAudio::m_pidController, cSoftHdAudio::m_pRingbuffer, cBufferFillLevelLowPassFilter::Reset(), cPidController::Reset(), cSoftHdRingbuffer::Reset(), and cBufferFillLevelLowPassFilter::ResetFramesCounters().

Referenced by cSoftHdDevice::FlushAudio().

FreeBytes()

size_t cSoftHdRingbuffer::FreeBytes

(

void

)

Get free bytes in ring buffer.

Returns

Number of bytes free in buffer

Definition at line 281 of file ringbuffer.cpp.

References atomic_read, cSoftHdRingbuffer::m_filled, and cSoftHdRingbuffer::m_size.

Referenced by cSoftHdAudio::IsBufferFull().

GetHardwareOutputDelayMs()

int64_t cSoftHdAudio::GetHardwareOutputDelayMs

(

void

)

Get the hardware delay in milliseconds.

Returns

delay in milliseconds, or AV_NOPTS_VALUE if not available

Definition at line 945 of file audio.cpp.

References AV_NOPTS_VALUE, cSoftHdAudio::FramesToMs(), cSoftHdAudio::m_hwSampleRate, cSoftHdAudio::m_inputPts, cSoftHdAudio::m_mutex, and cSoftHdAudio::m_pAlsaPCMHandle.

Referenced by cVideoRender::LogDroppedDuped().

GetHardwareOutputPtsMs()

int64_t cSoftHdAudio::GetHardwareOutputPtsMs

(

void

)

Get the hardware output PTS in milliseconds.

Calculates the presentation timestamp of audio currently being output by the hardware by accounting for ALSA/kernel buffer delays. This represents the PTS of the audio that is actually being played right now.

Returns

PTS in milliseconds, or AV_NOPTS_VALUE if not available

Definition at line 923 of file audio.cpp.

References AV_NOPTS_VALUE, cSoftHdAudio::FramesToMs(), cSoftHdAudio::GetOutputPtsMsInternal(), cSoftHdAudio::m_hwBaseline, cSoftHdAudio::m_hwSampleRate, cSoftHdAudio::m_inputPts, cSoftHdAudio::m_mutex, and cSoftHdAudio::m_pAlsaPCMHandle.

Referenced by cSoftHdPlayer::Action(), cVideoRender::DisplayFrame(), cSoftHdAudio::GetHardwareOutputPtsTimebaseUnits(), and cSoftHdPlayer::Play().

GetHardwareOutputPtsTimebaseUnits()

int64_t cSoftHdAudio::GetHardwareOutputPtsTimebaseUnits

(

void

)

Get the hardware output PTS in timebase units.

Returns

presentation timestamp in timebase units

Definition at line 964 of file audio.cpp.

References AV_NOPTS_VALUE, cSoftHdAudio::GetHardwareOutputPtsMs(), and cSoftHdAudio::MsToPts().

Referenced by cSoftHdDevice::GetSTC().

GetOutputPtsMs()

int64_t cSoftHdAudio::GetOutputPtsMs

(

void

)

Get the output PTS of the ringbuffer.

Calculates the presentation timestamp of the next audio sample that will be output from the ringbuffer. This is the input PTS minus the duration of audio currently buffered in the ringbuffer.

Note: This does not account for ALSA/kernel buffer delays. For the actual hardware output PTS, use GetHardwareOutputPtsMs() instead.

Returns

PTS in milliseconds

Definition at line 902 of file audio.cpp.

References cSoftHdAudio::GetOutputPtsMsInternal(), and cSoftHdAudio::m_mutex.

Referenced by cSoftHdDevice::GetFirstAudioPtsMsToPlay(), cSoftHdDevice::GetFirstVideoPtsMsToPlay(), cSoftHdDevice::IsBufferingThresholdReached(), and cSoftHdDevice::OnEventReceived().

GetOutputPtsMsInternal()

int64_t cSoftHdAudio::GetOutputPtsMsInternal ( void  )

private

Definition at line 909 of file audio.cpp.

References cSoftHdAudio::FramesToMs(), cSoftHdAudio::m_inputPts, cSoftHdAudio::m_pAlsaPCMHandle, cSoftHdAudio::m_pRingbuffer, cSoftHdAudio::PtsToMs(), and cSoftHdRingbuffer::UsedBytes().

Referenced by cSoftHdAudio::DropSamplesOlderThanPtsMs(), cSoftHdAudio::GetHardwareOutputPtsMs(), and cSoftHdAudio::GetOutputPtsMs().

GetReadPointer()

size_t cSoftHdRingbuffer::GetReadPointer

(

const void **

rp

)

Get read pointer and used bytes at this position of ring buffer.

Parameters

[out]

rp

Read pointer is placed here

Returns

The number of bytes that could be read from the ring buffer at the read pointer

Definition at line 256 of file ringbuffer.cpp.

References atomic_read, cSoftHdRingbuffer::m_filled, cSoftHdRingbuffer::m_pBufferEnd, and cSoftHdRingbuffer::m_pReadPointer.

Referenced by cSoftHdAudio::SendAudio().

GetUsedBytes()

int cSoftHdAudio::GetUsedBytes

(

void

)

Get used bytes in audio ringbuffer.

Definition at line 884 of file audio.cpp.

References cSoftHdAudio::m_pRingbuffer, and cSoftHdRingbuffer::UsedBytes().

Referenced by cVideoRender::LogDroppedDuped().

GetWritePointer()

size_t cSoftHdRingbuffer::GetWritePointer

(

void **

wp

)

Get write pointer and free bytes at this position of ring buffer.

Parameters

[out]

wp

Write pointer is placed here

Returns

The number of bytes that could be placed in the ring buffer at the write pointer.

Definition at line 151 of file ringbuffer.cpp.

References atomic_read, cSoftHdRingbuffer::m_filled, cSoftHdRingbuffer::m_pBufferEnd, cSoftHdRingbuffer::m_pWritePointer, and cSoftHdRingbuffer::m_size.

HandleError()

void cSoftHdAudio::HandleError ( int  error )

private

Handle an alsa error.

Definition at line 1111 of file audio.cpp.

References AUDIO, LOGERROR, cSoftHdAudio::m_eventQueue, cSoftHdAudio::m_pAlsaPCMHandle, and cSoftHdAudio::m_passthrough.

Referenced by cSoftHdAudio::CyclicCall().

InitFilter()

int cSoftHdAudio::InitFilter ( AVCodecContext *  audioCtx )

private

Init audio filters.

The following alsa filters are set:

• abuffer
• superequalizer
• aformat
• abuffersink

Return values

0	everything ok
1	didn't support channels, downmix set -> scrap this frame, test next
-1	something gone wrong

Definition at line 401 of file audio.cpp.

References cSoftHdAudio::AlsaSetup(), L_SOUND, LOGDEBUG2, LOGERROR, LOGWARNING, cSoftHdAudio::m_downmix, cSoftHdAudio::m_equalizerBand, cSoftHdAudio::m_filterChanged, cSoftHdAudio::m_filterReady, cSoftHdAudio::m_hwNumChannels, cSoftHdAudio::m_hwSampleRate, cSoftHdAudio::m_pBuffersinkCtx, cSoftHdAudio::m_pBuffersrcCtx, cSoftHdAudio::m_pFilterGraph, cSoftHdAudio::m_pTimebase, and cSoftHdAudio::m_useEqualizer.

Referenced by cSoftHdAudio::CheckForFilterReady().

LazyInit()

void cSoftHdAudio::LazyInit

(

void

)

Initialize audio output module (alsa)

The init is done lazily as soon as there is a STOP->PLAY state change or the mediaplayer wants to play video or audio.

This function can safely be called anytime, because it does nothing, if the init has already be done.

Definition at line 1075 of file audio.cpp.

References cSoftHdAudio::AlsaInit(), and cSoftHdAudio::m_initialized.

Referenced by cSoftHdDevice::OnEventReceived(), cSoftHdDevice::PlayAudioPkts(), and cSoftHdDevice::PlayVideoPkts().

Normalize()

void cSoftHdAudio::Normalize ( uint16_t *  samples, int  count  )

private

Normalize audio samples.

Parameters

samples	sample buffer
count	number of bytes in sample buffer

Definition at line 152 of file audio.cpp.

References L_SOUND, LOGDEBUG2, cSoftHdAudio::m_bytesPerSample, cSoftHdAudio::m_normalizeAverage, cSoftHdAudio::m_normalizeCounter, cSoftHdAudio::m_normalizeFactor, cSoftHdAudio::m_normalizeIndex, cSoftHdAudio::m_normalizeMaxFactor, cSoftHdAudio::m_normalizeMinFactor, cSoftHdAudio::m_normalizeReady, cSoftHdAudio::m_normalizeSamples, and cSoftHdAudio::NORMALIZE_MAX_INDEX.

Referenced by cSoftHdAudio::EnqueueFrame().

OpenAlsaDevice()

char * cSoftHdAudio::OpenAlsaDevice ( const char *  device, int  passthrough  )

private

Opens an alsa device.

Parameters

device	alsa device to be opened
passthrough	set, if this is a passthrough device

Returns

the alsa device if successful, NULL otherwise

Definition at line 1440 of file audio.cpp.

References L_SOUND, LOGDEBUG2, LOGWARNING, cSoftHdAudio::m_appendAES, and cSoftHdAudio::m_pAlsaPCMHandle.

Referenced by cSoftHdAudio::AlsaInitPCMDevice(), and cSoftHdAudio::FindAlsaDevice().

ProcessEvents()

void cSoftHdAudio::ProcessEvents ( void  )

private

Process queued events and forward them to event receiver.

Definition at line 1424 of file audio.cpp.

References cSoftHdAudio::m_eventQueue, cSoftHdAudio::m_pEventReceiver, and IEventReceiver::OnEventReceived().

Referenced by cSoftHdAudio::Action().

Read()

size_t cSoftHdRingbuffer::Read	(	void *	buf,
		size_t	cnt
	)

Read from a ring buffer.

Parameters

buf	buffer of cnt bytes to be read
cnt	Number of bytes to be read

Returns

Number of bytes that could be read from ring buffer

Definition at line 215 of file ringbuffer.cpp.

References atomic_read, atomic_sub, cSoftHdRingbuffer::m_filled, cSoftHdRingbuffer::m_pBuffer, cSoftHdRingbuffer::m_pBufferEnd, and cSoftHdRingbuffer::m_pReadPointer.

ReadAdvance()

size_t cSoftHdRingbuffer::ReadAdvance

(

size_t

cnt

)

Advance read pointer in ring buffer.

Parameters

cnt	Number of bytes to be advanced

Returns

Number of bytes that could be advanced in ring buffer

Definition at line 178 of file ringbuffer.cpp.

References atomic_read, atomic_sub, cSoftHdRingbuffer::m_filled, cSoftHdRingbuffer::m_pBuffer, cSoftHdRingbuffer::m_pBufferEnd, and cSoftHdRingbuffer::m_pReadPointer.

Referenced by cSoftHdAudio::DropSamplesOlderThanPtsMs(), and cSoftHdAudio::SendAudio().

ReorderAudioFrame()

static void ReorderAudioFrame ( uint16_t *  buf, int  size, int  channels  )

static

Reorder audio frame.

ffmpeg L R C Ls Rs -> alsa L R Ls Rs C ffmpeg L R C LFE Ls Rs -> alsa L R Ls Rs C LFE ffmpeg L R C LFE Ls Rs Rl Rr -> alsa L R Ls Rs C LFE Rl Rr

Parameters

buf[IN,OUT]	sample buffer
size	size of sample buffer in bytes
channels	number of channels interleaved in sample buffer

Definition at line 95 of file audio.cpp.

Referenced by cSoftHdAudio::EnqueueFrame().

Reset() [1/2]

void cPidController::Reset

(

void

)

Reset the internal state (integral sum and error history).

Definition at line 99 of file pidcontroller.cpp.

References cPidController::dTerm, cPidController::firstRun, cPidController::integralSum, cPidController::iTerm, cPidController::previousError, and cPidController::pTerm.

Referenced by cSoftHdAudio::DropSamplesOlderThanPtsMs(), cSoftHdAudio::FlushBuffers(), and cPidController::Update().

Reset() [2/2]

void cSoftHdRingbuffer::Reset

(

void

)

Reset ring buffer pointers.

Definition at line 59 of file ringbuffer.cpp.

References atomic_set, cSoftHdRingbuffer::m_filled, cSoftHdRingbuffer::m_pBuffer, cSoftHdRingbuffer::m_pReadPointer, and cSoftHdRingbuffer::m_pWritePointer.

Referenced by cSoftHdAudio::FlushBuffers().

ResetHwDelayBaseline()

void cSoftHdAudio::ResetHwDelayBaseline

(

void

)

Reset the hw delay baseline.

Definition at line 1412 of file audio.cpp.

References L_SOUND, LOGDEBUG2, cSoftHdAudio::m_firstRealAudioReceived, cSoftHdAudio::m_hwBaseline, and cSoftHdAudio::m_mutex.

Referenced by cSoftHdDevice::OnEnteringState(), cSoftHdDevice::OnEventReceived(), and cSoftHdDevice::OnLeavingState().

SendAudio()

bool cSoftHdAudio::SendAudio ( int  freeAlsaBufferFrames )

private

Write regular audio data from the ringbuffer to the hardware.

Parameters

freeAlsaBufferFrames

number of frames that can be written to the hardware

Return values

true	if data was written or the write should be scheduled again immediately
false	if no data was written

Definition at line 1298 of file audio.cpp.

References cSoftHdRingbuffer::GetReadPointer(), L_SOUND, LOGDEBUG2, LOGERROR, LOGWARNING, cSoftHdAudio::m_alsaUseMmap, cSoftHdAudio::m_fillLevel, cSoftHdAudio::m_pAlsaPCMHandle, cSoftHdAudio::m_passthrough, cSoftHdAudio::m_pRingbuffer, cSoftHdAudio::m_softVolume, cSoftHdAudio::m_volume, cSoftHdRingbuffer::ReadAdvance(), cSoftHdAudio::SoftAmplify(), and cBufferFillLevelLowPassFilter::WroteFrames().

Referenced by cSoftHdAudio::CyclicCall().

SendPause()

bool cSoftHdAudio::SendPause ( void  )

private

Write pause to passthrough device.

Returns

true if a complete burst was written, false otherwise

Definition at line 1358 of file audio.cpp.

References LOGERROR, LOGWARNING, cSoftHdAudio::m_alsaUseMmap, cSoftHdAudio::m_pAlsaPCMHandle, cSoftHdAudio::m_pauseBurst, and cSoftHdAudio::m_spdifBurstSize.

Referenced by cSoftHdAudio::CyclicCall().

SetCompression()

void cSoftHdAudio::SetCompression	(	bool	enable,
		int	maxfac
	)

Set volume compression parameters.

Parameters

enable	true, turn on compression
maxfac	max. factor of compression / 1000

Definition at line 1027 of file audio.cpp.

References cSoftHdAudio::m_compression, cSoftHdAudio::m_compressionFactor, and cSoftHdAudio::m_compressionMaxFactor.

Referenced by cSoftHdAudio::cSoftHdAudio(), and cMenuSetupSoft::Store().

SetEq()

void cSoftHdAudio::SetEq	(	int	band[18],
		int	onoff
	)

Set equalizer bands.

Parameters

band	setting frequenz bands
onoff	set using equalizer

Definition at line 319 of file audio.cpp.

References cSoftHdAudio::m_equalizerBand, cSoftHdAudio::m_filterChanged, and cSoftHdAudio::m_useEqualizer.

Referenced by cSoftHdAudio::cSoftHdAudio(), and cMenuSetupSoft::Store().

SetHwDelayBaseline()

void cSoftHdAudio::SetHwDelayBaseline

(

void

)

Set the hw delay baseline.

Definition at line 1392 of file audio.cpp.

References cSoftHdAudio::FramesToMs(), L_SOUND, LOGDEBUG2, cSoftHdAudio::m_firstRealAudioReceived, cSoftHdAudio::m_hwBaseline, cSoftHdAudio::m_pAlsaPCMHandle, and cSoftHdAudio::m_passthrough.

Referenced by cSoftHdDevice::OnEventReceived(), and cSoftHdDevice::OnLeavingState().

SetNormalize()

void cSoftHdAudio::SetNormalize	(	bool	enable,
		int	maxfac
	)

Set normalize volume parameters.

Parameters

enable	true, turn on normalize
maxfac	max. factor of normalize / 1000

Definition at line 1015 of file audio.cpp.

References cSoftHdAudio::m_normalize, and cSoftHdAudio::m_normalizeMaxFactor.

Referenced by cSoftHdAudio::cSoftHdAudio(), and cMenuSetupSoft::Store().

SetPassthroughMask()

void cSoftHdAudio::SetPassthroughMask

(

int

mask

)

Set audio passthrough mask.

Parameters

mask	passthrough mask (as a bitmask)

Definition at line 1056 of file audio.cpp.

References cSoftHdAudio::m_passthrough, and cSoftHdAudio::m_pitchPpm.

Referenced by cSoftHdDevice::SetPassthroughMask().

SetPaused()

void cSoftHdAudio::SetPaused

(

bool

pause

)

Set audio playback pause state.

Parameters

pause

true to pause, false to resume

Definition at line 1001 of file audio.cpp.

References L_SOUND, LOGDEBUG2, cSoftHdAudio::m_paused, and cSoftHdAudio::m_pauseMutex.

Referenced by cSoftHdDevice::Clear(), cVideoRender::DisplayFrame(), cSoftHdDevice::OnEnteringState(), cSoftHdDevice::OnEventReceived(), and cSoftHdDevice::OnLeavingState().

SetStereoDescent()

void cSoftHdAudio::SetStereoDescent

(

int

delta

)

Set stereo loudness descent.

Parameters

delta

value (/1000) to reduce stereo volume

Definition at line 1045 of file audio.cpp.

References cSoftHdAudio::m_stereoDescent, cSoftHdAudio::m_volume, and cSoftHdAudio::SetVolume().

Referenced by cSoftHdAudio::cSoftHdAudio(), and cMenuSetupSoft::Store().

Setup()

int cSoftHdAudio::Setup	(	AVCodecContext *	ctx,
		int	samplerate,
		int	channels,
		int	passthrough
	)

Alsa setup wrapper.

only used for passthrough atm, setting up PCM alsa goes via Filter()

Parameters

AudioCtx	AVCodec audio decoding context
samplerate	stream samplerate
channels	stream nb of channels
passthrough	passthrough enabled

Return values

0	everything ok
-1	something gone wrong in AlsaSetup
1	no parameter change, no setup needed

Definition at line 729 of file audio.cpp.

References cSoftHdAudio::AlsaSetup(), LOGERROR, cSoftHdAudio::m_downmix, cSoftHdAudio::m_hwNumChannels, cSoftHdAudio::m_hwSampleRate, and cSoftHdAudio::m_pTimebase.

Referenced by cAudioDecoder::UpdateFormat().

SetVolume()

void cSoftHdAudio::SetVolume

(

int

volume

)

Set mixer volume (0-1000)

Parameters

volume

volume (0 .. 1000)

Definition at line 978 of file audio.cpp.

References cSoftHdAudio::AlsaSetVolume(), cSoftHdAudio::m_amplifier, cSoftHdAudio::m_hwNumChannels, cSoftHdAudio::m_passthrough, cSoftHdAudio::m_softVolume, cSoftHdAudio::m_stereoDescent, and cSoftHdAudio::m_volume.

Referenced by cSoftHdDevice::OnEventReceived(), cSoftHdAudio::SetStereoDescent(), and cSoftHdDevice::SetVolumeDevice().

SoftAmplify()

void cSoftHdAudio::SoftAmplify ( int16_t *  samples, int  count  )

private

Amplify the samples in software.

Parameters

samples	sample buffer
count	number of bytes in sample buffer

Todo:

FIXME: this does hard clipping

Definition at line 290 of file audio.cpp.

References cSoftHdAudio::m_amplifier, cSoftHdAudio::m_bytesPerSample, and cSoftHdAudio::m_volume.

Referenced by cSoftHdAudio::SendAudio().

Stop()

void cSoftHdAudio::Stop

(

void

)

Stop the thread.

Definition at line 1217 of file audio.cpp.

References LOGDEBUG.

Referenced by cSoftHdAudio::AlsaSetup(), and cSoftHdAudio::Exit().

Update()

double cPidController::Update	(	double	currentValue,
		double	dt
	)

Calculate the new output value.

Parameters

currentValue	The current value
dt	The time elapsed since the last update (seconds)

Returns

The output value

Definition at line 56 of file pidcontroller.cpp.

References cPidController::derivativeGain, cPidController::dTerm, cPidController::firstRun, cPidController::integralGain, cPidController::integralSum, cPidController::iTerm, LOGWARNING, cPidController::maxIntegral, cPidController::maxOutput, cPidController::previousError, cPidController::proportionalGain, cPidController::pTerm, cPidController::Reset(), and cPidController::targetValue.

Referenced by cSoftHdAudio::ClockDriftCompensation().

UsedBytes()

size_t cSoftHdRingbuffer::UsedBytes

(

void

)

Get used bytes in ring buffer.

Returns

Number of bytes used in buffer.

Definition at line 291 of file ringbuffer.cpp.

References atomic_read, and cSoftHdRingbuffer::m_filled.

Referenced by cSoftHdAudio::DropSamplesOlderThanPtsMs(), cSoftHdAudio::GetOutputPtsMsInternal(), and cSoftHdAudio::GetUsedBytes().

Write()

size_t cSoftHdRingbuffer::Write	(	const void *	buf,
		size_t	cnt
	)

Write to a ring buffer.

Parameters

buf	buffer of cnt bytes to be written
cnt	Number of bytes in buffer

Returns

The number of bytes that could be placed in the ring buffer

Definition at line 110 of file ringbuffer.cpp.

References atomic_add, atomic_read, cSoftHdRingbuffer::m_filled, cSoftHdRingbuffer::m_pBuffer, cSoftHdRingbuffer::m_pBufferEnd, cSoftHdRingbuffer::m_pWritePointer, and cSoftHdRingbuffer::m_size.

Referenced by cSoftHdAudio::Enqueue().

WriteAdvance()

size_t cSoftHdRingbuffer::WriteAdvance

(

size_t

cnt

)

Advance write pointer in ring buffer.

Parameters

cnt	Number of bytes to be adavanced

Returns

Number of bytes that could be advanced in ring buffer

Definition at line 73 of file ringbuffer.cpp.

References atomic_add, atomic_read, cSoftHdRingbuffer::m_filled, cSoftHdRingbuffer::m_pBuffer, cSoftHdRingbuffer::m_pBufferEnd, cSoftHdRingbuffer::m_pWritePointer, and cSoftHdRingbuffer::m_size.

~cSoftHdRingbuffer()

cSoftHdRingbuffer::~cSoftHdRingbuffer

(

void

)

cSoftHdRingbuffer destructor

Definition at line 51 of file ringbuffer.cpp.

References cSoftHdRingbuffer::m_pBuffer.