CMediaPipelineWebOS Class Reference

WebOS media pipeline for audio/video playback. More...

#include <MediaPipelineWebOS.h>

Inheritance diagram for CMediaPipelineWebOS:

Public Member Functions
	CMediaPipelineWebOS (CProcessInfo &processInfo, CRenderManager &renderManager, CDVDClock &clock, CDVDMessageQueue &parent, CDVDOverlayContainer &overlay, bool hasAudio)
	Construct the WebOS media pipeline.
	~CMediaPipelineWebOS () override
	Destructor, cleans up and unloads streams.
void	FlushVideoMessages ()
	Flush all pending video messages.
void	FlushAudioMessages ()
	Flush all pending audio messages.
bool	OpenAudioStream (CDVDStreamInfo &audioHint)
	Open an audio stream using provided hints.
bool	OpenVideoStream (CDVDStreamInfo hint)
	Open a video stream using provided hints.
void	CloseAudioStream (bool waitForBuffers)
	Close the audio stream.
void	CloseVideoStream (bool waitForBuffers)
	Close the video stream.
void	Flush (bool sync)
	Flush both audio and video pipelines.
bool	AcceptsAudioData () const
	Check if pipeline can accept more audio data.
bool	AcceptsVideoData () const
	Check if pipeline can accept more video data.
bool	HasAudioData () const
	Check if there is buffered audio data.
bool	HasVideoData () const
	Check if there is buffered video data.
bool	IsAudioInited () const
	Check if audio subsystem is initialized.
bool	IsVideoInited () const
	Check if video subsystem is initialized.
int	GetAudioLevel () const
	Get current audio buffer level.
bool	IsStalled () const
	Check if playback is stalled.
void	SendAudioMessage (const std::shared_ptr< CDVDMsg > &msg, int priority)
	Send a message to the audio queue.
void	SendVideoMessage (const std::shared_ptr< CDVDMsg > &msg, int priority)
	Send a message to the video queue.
void	SetSpeed (int speed)
	Set playback speed.
double	GetCurrentPts () const
	Get current presentation timestamp in seconds.
int	GetAudioChannels () const
	Get number of audio channels configured.
void	EnableSubtitle (bool enable)
	Enable or disable subtitle rendering.
bool	IsSubtitleEnabled () const
	Check if subtitles are enabled.
double	GetSubtitleDelay () const
	Get current subtitle display delay.
void	SetSubtitleDelay (double delay)
	Set subtitle display delay.
int	GetVideoBitrate () const
std::string	GetAudioInfo ()
std::string	GetVideoInfo ()
void	GetVideoResolution (unsigned int &width, unsigned int &height) const
	Get the resolution of the video stream.
Public Member Functions inherited from CThread
	CThread (IRunnable *pRunnable, const char *ThreadName)
virtual	~CThread ()
void	Create (bool bAutoDelete=false)
template<typename Rep , typename Period >
void	Sleep (std::chrono::duration< Rep, Period > duration)
bool	IsAutoDelete () const
virtual void	StopThread (bool bWait=true)
bool	IsRunning () const
bool	IsCurrentThread () const
bool	Join (std::chrono::milliseconds duration)
bool	SetPriority (const ThreadPriority &priority)
	Set the threads priority. This uses the platforms native threading library to do so.
virtual void	OnException ()

Static Public Member Functions
static bool	Supports (AVCodecID codec, int profile)
	Check if a codec is supported by the pipeline.
Static Public Member Functions inherited from CThread
static const std::thread::id	GetCurrentThreadId ()
static CThread *	GetCurrentThread ()

Protected Member Functions
void	Process () override
	Video processing thread loop.
void	ProcessAudio ()
	Audio processing thread loop.
Protected Member Functions inherited from CThread
	CThread (const char *ThreadName)
virtual void	OnStartup ()
virtual void	OnExit ()
WaitResponse	AbortableWait (CEvent &event, std::chrono::milliseconds duration=std::chrono::milliseconds(-1))

Additional Inherited Members
Protected Types inherited from CThread
enum	WaitResponse { WAIT_INTERRUPTED = -1 , WAIT_SIGNALED = 0 , WAIT_TIMEDOUT = 1 }
Protected Attributes inherited from CThread
std::atomic< bool >	m_bStop

Detailed Description

WebOS media pipeline for audio/video playback.

Constructor & Destructor Documentation

CMediaPipelineWebOS()

CMediaPipelineWebOS::CMediaPipelineWebOS ( CProcessInfo &  processInfo, CRenderManager &  renderManager, CDVDClock &  clock, CDVDMessageQueue &  parent, CDVDOverlayContainer &  overlay, bool  hasAudio  )

explicit

Construct the WebOS media pipeline.

Parameters

processInfo	Reference to process information.
renderManager	Reference to the render manager.
clock	Reference to the clock for timing.
parent	Parent message queue for control messages.
overlay	Overlay container for subtitle rendering.
hasAudio	True if audio stream is present, false otherwise.

~CMediaPipelineWebOS()

CMediaPipelineWebOS::~CMediaPipelineWebOS ( )

override

Destructor, cleans up and unloads streams.

Member Function Documentation

AcceptsAudioData()

bool CMediaPipelineWebOS::AcceptsAudioData

(

)

const

Check if pipeline can accept more audio data.

Returns

True if accepting audio data.

AcceptsVideoData()

bool CMediaPipelineWebOS::AcceptsVideoData

(

)

const

Check if pipeline can accept more video data.

Returns

True if accepting video data.

CloseAudioStream()

void CMediaPipelineWebOS::CloseAudioStream

(

bool

waitForBuffers

)

Close the audio stream.

Parameters

waitForBuffers

If true, wait until buffers are processed.

CloseVideoStream()

void CMediaPipelineWebOS::CloseVideoStream

(

bool

waitForBuffers

)

Close the video stream.

Parameters

waitForBuffers

If true, wait until buffers are processed.

EnableSubtitle()

void CMediaPipelineWebOS::EnableSubtitle

(

bool

enable

)

Enable or disable subtitle rendering.

Parameters

enable

True to enable subtitles.

Flush()

void CMediaPipelineWebOS::Flush

(

bool

sync

)

Flush both audio and video pipelines.

Parameters

sync	If true, flush synchronously.

FlushAudioMessages()

void CMediaPipelineWebOS::FlushAudioMessages

(

)

Flush all pending audio messages.

FlushVideoMessages()

void CMediaPipelineWebOS::FlushVideoMessages

(

)

Flush all pending video messages.

GetAudioChannels()

int CMediaPipelineWebOS::GetAudioChannels ( ) const

inline

Get number of audio channels configured.

Returns

Channel count.

GetAudioInfo()

std::string CMediaPipelineWebOS::GetAudioInfo

(

)

Returns

Audio stream debug info

GetAudioLevel()

int CMediaPipelineWebOS::GetAudioLevel

(

)

const

Get current audio buffer level.

Returns

Buffer level percentage.

GetCurrentPts()

double CMediaPipelineWebOS::GetCurrentPts

(

)

const

Get current presentation timestamp in seconds.

Returns

Current PTS (seconds).

GetSubtitleDelay()

double CMediaPipelineWebOS::GetSubtitleDelay

(

)

const

Get current subtitle display delay.

Returns

Delay in seconds.

GetVideoBitrate()

int CMediaPipelineWebOS::GetVideoBitrate

(

)

const

Returns

Video bitrate in bits per second.

GetVideoInfo()

std::string CMediaPipelineWebOS::GetVideoInfo

(

)

Returns

Video stream debug info

GetVideoResolution()

void CMediaPipelineWebOS::GetVideoResolution	(	unsigned int &	width,
		unsigned int &	height
	)		const

Get the resolution of the video stream.

Parameters

width	Stream width (output parameter)
height	Stream height (output parameter)

HasAudioData()

bool CMediaPipelineWebOS::HasAudioData

(

)

const

Check if there is buffered audio data.

Returns

True if audio data buffered.

HasVideoData()

bool CMediaPipelineWebOS::HasVideoData

(

)

const

Check if there is buffered video data.

Returns

True if video data buffered.

IsAudioInited()

bool CMediaPipelineWebOS::IsAudioInited

(

)

const

Check if audio subsystem is initialized.

Returns

True if initialized.

IsStalled()

bool CMediaPipelineWebOS::IsStalled

(

)

const

Check if playback is stalled.

Returns

True if stalled.

IsSubtitleEnabled()

bool CMediaPipelineWebOS::IsSubtitleEnabled

(

)

const

Check if subtitles are enabled.

Returns

True if enabled.

IsVideoInited()

bool CMediaPipelineWebOS::IsVideoInited

(

)

const

Check if video subsystem is initialized.

Returns

True if initialized.

OpenAudioStream()

bool CMediaPipelineWebOS::OpenAudioStream

(

CDVDStreamInfo &

audioHint

)

Open an audio stream using provided hints.

Parameters

audioHint

Audio stream information.

Returns

True on success.

OpenVideoStream()

bool CMediaPipelineWebOS::OpenVideoStream

(

CDVDStreamInfo

hint

)

Open a video stream using provided hints.

Parameters

hint	Video stream information.

Returns

True on success.

Process()

void CMediaPipelineWebOS::Process ( void  )

overrideprotectedvirtual

Video processing thread loop.

Continuously reads messages and feeds video data to the pipeline.

Reimplemented from CThread.

ProcessAudio()

void CMediaPipelineWebOS::ProcessAudio ( )

protected

Audio processing thread loop.

Continuously reads messages and feeds audio data to the pipeline.

SendAudioMessage()

void CMediaPipelineWebOS::SendAudioMessage	(	const std::shared_ptr< CDVDMsg > &	msg,
		int	priority
	)

Send a message to the audio queue.

Parameters

msg	Message to send.
priority	Message priority.

SendVideoMessage()

void CMediaPipelineWebOS::SendVideoMessage	(	const std::shared_ptr< CDVDMsg > &	msg,
		int	priority
	)

Send a message to the video queue.

Parameters

msg	Message to send.
priority	Message priority.

SetSpeed()

void CMediaPipelineWebOS::SetSpeed

(

int

speed

)

Set playback speed.

Parameters

speed

Playback rate (per-mille units).

SetSubtitleDelay()

void CMediaPipelineWebOS::SetSubtitleDelay

(

double

delay

)

Set subtitle display delay.

Parameters

delay

Delay in seconds.

Supports()

bool CMediaPipelineWebOS::Supports ( AVCodecID  codec, int  profile  )

static

Check if a codec is supported by the pipeline.

Parameters

codec	AVCodecID to check.
profile	profile to check.

Returns

True if supported, false otherwise.

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The documentation for this class was generated from the following files:

• MediaPipelineWebOS.h
• MediaPipelineWebOS.cpp