BIAS::DShowVideo Class Reference

Die Klasse ReadAvi ist zentraler Bestandteil der Infrastruktur zum Dekodieren von AVI-Videocontainern. Weitere Bestandteile sind: SampleGrabberCallback. More...

#include <VideoSource/DShowVideo.hh>

Collaboration diagram for BIAS::DShowVideo:

Public Member Functions
void	Close ()
	DShowVideo (SampleGrabberCallback *sgcb)
void	EnableReliableFrameRead (const bool enabled)
	If grabber is in realibale mode and frame grabbing failed for some reason the reader retrys to read the current frame. More...
bool	GetImageSize (unsigned &width, unsigned &height, unsigned &channel_count)
	returns the image size contained in the stream, only meaningfull results after call to Open() function More...
SampleGrabberCallback *	GetSampleGrabberCallback ()
void	GotoFrame (unsigned long long frameNo)
bool	Open (const std::string &filename)
	open file, if not possible throw exception More...
void	Pause ()
void	PlayContinously ()
void	PlaySingleFrame ()
	~DShowVideo ()

Protected Member Functions
bool	Init_ ()

Protected Attributes
unsigned	ChannelCount_
DShowStuff *	DShowStuff_
bool	FastNLazy_
unsigned long long	FrameNum_
unsigned	Height_
bool	Initialised_
bool	IsPaused_
bool	IsRunning_
bool	Open_
SampleGrabberCallback *	SGCB_
unsigned	Width_

Detailed Description

Die Klasse ReadAvi ist zentraler Bestandteil der Infrastruktur zum Dekodieren von AVI-Videocontainern. Weitere Bestandteile sind: SampleGrabberCallback.

Test:

tested with TestDShowVideo.cpp

ReadAvi baut einen DShow-Graphen auf aus drei Filtern: pSrcFilter_ zum oeffnen und dekodieren des Videos, pSampleGrabber um einzelne Samples abzugreifen und pNullRenderer umd die Vollstaendigkeit des Graphs mit einer Senke zu gewaehrleisten. Die Filter werden ueber ihre jeweiligen In und Out-Pins verbunden. Die Klasse SampleGrabberCallback muss dem Konstruktor von ReadAvi mitgegeben werden. Fuer jedes Frame wird dann von DShow die Methode SampleGrabberCallback::SampleCB(..) aufgerufen. Diese kann dann die Bilddaten herausgeben.

Um im Code der Klassen die ReadAvi u.a. benutzen keine #ifdef ...DSHOW... einbauen zu muessen, sollen die Klassen und alle Interfaces immer mitkompiliert werden. Falls DShow nicht zur Verfuegung steht, sind die Methoden der Klassen ReadAvi und SampleGrabberCallback eben leer.

Author

Max Hollmann

Definition at line 57 of file DShowVideo.hh.

Constructor & Destructor Documentation

DShowVideo::DShowVideo

(

SampleGrabberCallback *

sgcb

)

Definition at line 59 of file DShowVideo.cpp.

DShowVideo::~DShowVideo

(

)

Definition at line 74 of file DShowVideo.cpp.

Member Function Documentation

void DShowVideo::Close

(

)

Definition at line 418 of file DShowVideo.cpp.

void BIAS::DShowVideo::EnableReliableFrameRead ( const bool  enabled )

inline

If grabber is in realibale mode and frame grabbing failed for some reason the reader retrys to read the current frame.

This mode can slow down frame reading so don't use it for realtime playback.

Definition at line 86 of file DShowVideo.hh.

bool DShowVideo::GetImageSize	(	unsigned &	width,
		unsigned &	height,
		unsigned &	channel_count
	)

returns the image size contained in the stream, only meaningfull results after call to Open() function

Definition at line 493 of file DShowVideo.cpp.

SampleGrabberCallback* BIAS::DShowVideo::GetSampleGrabberCallback ( )

inline

Definition at line 78 of file DShowVideo.hh.

void DShowVideo::GotoFrame

(

unsigned long long

frameNo

)

Definition at line 396 of file DShowVideo.cpp.

bool DShowVideo::Init_ ( )

protected

Definition at line 85 of file DShowVideo.cpp.

bool DShowVideo::Open

(

const std::string &

filename

)

open file, if not possible throw exception

Definition at line 176 of file DShowVideo.cpp.

void DShowVideo::Pause

(

)

Definition at line 374 of file DShowVideo.cpp.

void DShowVideo::PlayContinously

(

)

Definition at line 355 of file DShowVideo.cpp.

void DShowVideo::PlaySingleFrame

(

)

Definition at line 294 of file DShowVideo.cpp.

Member Data Documentation

unsigned BIAS::DShowVideo::ChannelCount_

protected

Definition at line 107 of file DShowVideo.hh.

DShowStuff* BIAS::DShowVideo::DShowStuff_

protected

Definition at line 103 of file DShowVideo.hh.

bool BIAS::DShowVideo::FastNLazy_

protected

Definition at line 106 of file DShowVideo.hh.

unsigned long long BIAS::DShowVideo::FrameNum_

protected

Definition at line 100 of file DShowVideo.hh.

unsigned BIAS::DShowVideo::Height_

protected

Definition at line 107 of file DShowVideo.hh.

bool BIAS::DShowVideo::Initialised_

protected

Definition at line 104 of file DShowVideo.hh.

bool BIAS::DShowVideo::IsPaused_

protected

Definition at line 98 of file DShowVideo.hh.

bool BIAS::DShowVideo::IsRunning_

protected

Definition at line 97 of file DShowVideo.hh.

bool BIAS::DShowVideo::Open_

protected

Definition at line 105 of file DShowVideo.hh.

SampleGrabberCallback* BIAS::DShowVideo::SGCB_

protected

Definition at line 101 of file DShowVideo.hh.

unsigned BIAS::DShowVideo::Width_

protected

Definition at line 107 of file DShowVideo.hh.

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

• VideoSource/DShowVideo.hh
• VideoSource/DShowVideo.cpp