#include <videoio.h>

Inheritance diagram for PVideoInputEmulatedDevice:

Collaboration diagram for PVideoInputEmulatedDevice:

Public Types
enum	{ Channel_PlayAndClose, Channel_PlayAndRepeat, Channel_PlayAndKeepLast, Channel_PlayAndShowBlack, Channel_PlayAndShowWhite, ChannelCount }

Public Types inherited from PVideoInputDevice
enum	ControlMode { AutomaticControl, AbsoluteControl, RelativeControl, ResetControl }

Public Types inherited from PVideoFrameInfo
enum	StandardSizes { SQCIFWidth = 128, SQCIFHeight = 96, QCIFWidth = 176, QCIFHeight = 144, CIFWidth = 352, CIFHeight = 288, CIF4Width = 704, CIF4Height = 576, CIF16Width = 1408, CIF16Height = 1152, HD480Width = 704, HD480Height = 480, i480Width = 704, i480Height = 480, HD720Width = 1280, HD720Height = 720, p720Width = 1280, p720Height = 720, HD1080Width = 1920, HD1080Height = 1080, i1080Width = 1920, i1080Height = 1080, HDTVWidth = 1920, HDTVHeight = 1080, MaxWidth = 1920, MaxHeight = 1200 }

Public Types inherited from PObject
enum	Comparison { LessThan = -1, EqualTo = 0, GreaterThan = 1 }
	Result of the comparison operation performed by the `Compare()` function. More...

Public Member Functions
	PVideoInputEmulatedDevice ()

	~PVideoInputEmulatedDevice ()

PBoolean	Start ()
	Start the video device I/O. More...

PBoolean	Stop ()
	Stop the video device I/O capture. More...

PBoolean	IsCapturing ()
	Determine if the video device I/O capture is in progress. More...

virtual PBoolean	SetColourFormat (const PString &colourFormat)
	Set the colour format to be used. More...

virtual int	GetNumChannels ()
	Get the number of video channels available on the device. More...

virtual PStringArray	GetChannelNames ()
	Get the names of video channels available on the device. More...

virtual PBoolean	GetFrameSizeLimits (unsigned &minWidth, unsigned &minHeight, unsigned &maxWidth, unsigned &maxHeight)
	Get the minimum & maximum size of a frame on the device. More...

virtual PBoolean	SetFrameRate (unsigned rate)
	Set the video frame rate to be used on the device. More...

virtual PBoolean	SetFrameSize (unsigned width, unsigned height)
	Set the frame size to be used. More...

Public Member Functions inherited from PVideoInputDevice
	~PVideoInputDevice ()
	Create a new video input device. More...

virtual bool	GetDeviceCapabilities (Capabilities *capabilities) const
	Retrieve a list of Device Capabilities. More...

virtual PBoolean	Open (const PString &deviceName, PBoolean startImmediate=true)=0
	Open the device given the device name. More...

virtual PBoolean	Close ()
	Close the device. More...

virtual PBoolean	CanCaptureVideo () const
	Is the device a camera, and obtain video. More...

virtual PBoolean	SetNearestFrameSize (unsigned width, unsigned height)
	Set the nearest available frame size to be used. More...

bool	GetFrame (BYTE *buffer, PINDEX &bytesReturned, bool &keyFrame, bool wait=true)
	Grab a frame. More...

virtual PBoolean	GetFrame (PBYTEArray &frame)

virtual PBoolean	GetFrame (PBYTEArray &frame, unsigned &width, unsigned &height)

bool	GetFrameData (BYTE buffer, PINDEX bytesReturned, bool &keyFrame)
	For backward compatibility. More...

bool	GetFrameData (BYTE buffer, PINDEX bytesReturned=NULL)
	For backward compatibility. More...

bool	GetFrameDataNoDelay (BYTE buffer, PINDEX bytesReturned, bool &keyFrame)
	For backward compatibility. More...

bool	GetFrameDataNoDelay (BYTE buffer, PINDEX bytesReturned=NULL)
	For backward compatibility. More...

virtual bool	FlowControl (const void *flowData)
	Pass data to the inputdevice for flowControl determination. More...

virtual bool	SetCaptureMode (unsigned mode)
	Set the capture modes for implementations that support them. More...

virtual int	GetCaptureMode () const
	Returns the current capture mode. More...

virtual bool	SetControl (PVideoControlInfo::Types type, int value, ControlMode mode)

virtual const PVideoControlInfo &	GetControlInfo (PVideoControlInfo::Types type) const

Public Member Functions inherited from PVideoDevice
virtual	~PVideoDevice ()
	Delete structures created by PVideoDevice();. More...

virtual void	PrintOn (ostream &strm) const
	Output the contents of the object to the stream. More...

	P_DECLARE_STREAMABLE_ENUM (VideoFormat, PAL, NTSC, SECAM, Auto)

virtual PString	GetDeviceName () const
	Get the device name of the open device. More...

virtual PStringArray	GetDeviceNames () const =0
	Get a list of all of the drivers available. More...

virtual PBoolean	OpenFull (const OpenArgs &args, PBoolean startImmediate=true)
	Open the device given the device name. More...

virtual PBoolean	IsOpen ()=0
	Determine if the device is currently open. More...

virtual PBoolean	SetVideoFormat (VideoFormat videoFormat)
	Set the video format to be used. More...

virtual VideoFormat	GetVideoFormat () const
	Get the video format being used. More...

virtual PBoolean	SetChannel (int channelNumber)
	Set the video channel to be used on the device. More...

virtual int	GetChannel () const
	Get the video channel to be used on the device. More...

virtual bool	SetFrameInfoConverter (const PVideoFrameInfo &info)
	Set the frame info to be used, trying converters if available. More...

virtual PBoolean	SetColourFormatConverter (const PString &colourFormat)
	Set the colour format to be used, trying converters if available. More...

virtual PBoolean	GetVFlipState ()
	Get the video conversion vertical flip state. More...

virtual PBoolean	SetVFlipState (PBoolean newVFlipState)
	Set the video conversion vertical flip state. More...

virtual PBoolean	SetFrameSizeConverter (unsigned width, unsigned height, ResizeMode resizeMode=eMaxResizeMode)
	Set the frame size to be used, trying converters if available. More...

virtual PBoolean	GetFrameSize (unsigned &width, unsigned &height) const
	Get the frame size being used. More...

virtual PString	GetColourFormat () const
	Get the colour format being used. More...

virtual PINDEX	GetMaxFrameBytes ()
	Get the maximum frame size in bytes. More...

virtual int	GetLastError () const
	Get the last error code. More...

virtual bool	GetAttributes (Attributes &attributes)
	Get video attributes. More...

virtual bool	SetAttributes (const Attributes &attributes)
	Set video attributes. More...

virtual PBoolean	SetVideoChannelFormat (int channelNumber, VideoFormat videoFormat)
	Set VideoFormat and VideoChannel in one ioctl. More...

virtual void	SetPreferredColourFormat (const PString &colourFmt)
	Set preferred native colour format from video capture device. More...

virtual PString	GetPreferredColourFormat ()
	Get preferred native colour format from video capture device. More...

Public Member Functions inherited from PVideoFrameInfo
	P_DECLARE_ENUM_EX (ResizeMode, eMaxResizeMode, eScale, 0, eCropCentre, eCropTopLeft, eScaleKeepAspect)

	PVideoFrameInfo ()
	Construct video frame information. More...

	PVideoFrameInfo (unsigned frameWidth, unsigned frameHeight, const PString &colourFormat=PVideoFrameInfo::YUV420P(), unsigned frameRate=15, ResizeMode resizeMode=eScale)

virtual Comparison	Compare (const PObject &obj) const
	Compare the two PVideoFrameInfo and return their relative rank. More...

virtual unsigned	GetFrameWidth () const
	Get the width of the frame being used. More...

virtual unsigned	GetFrameHeight () const
	Get the height of the frame being used. More...

virtual PBoolean	SetFrameSar (unsigned width, unsigned height)
	Set the Storage Aspect Ratio size to be used. More...

virtual PBoolean	GetSarSize (unsigned &width, unsigned &height) const
	Get the Storage Aspect Ratio size being used. More...

virtual unsigned	GetSarWidth () const
	Get the width of the Storage Aspect Ratio being used. More...

virtual unsigned	GetSarHeight () const
	Get the height of the Storage Aspect Ratio being used. More...

virtual unsigned	GetFrameRate () const
	Get the video frame rate used on the device. More...

virtual void	SetResizeMode (ResizeMode mode)
	Set the resize mode to be used. More...

virtual ResizeMode	GetResizeMode () const
	Get the resize mode to be used. More...

virtual PINDEX	CalculateFrameBytes () const
	Get the number of bytes of an image, given a particular width, height and colour format. More...

virtual bool	Parse (const PString &str)
	Parse a descriptor string for the video format. More...

Public Member Functions inherited from PObject
__inline unsigned	GetTraceContextIdentifier () const
	Get PTRACE context identifier. More...

__inline void	SetTraceContextIdentifier (unsigned id)

__inline void	SetTraceContextIdentifier (const PObject &obj)

__inline void	SetTraceContextIdentifier (const PObject *obj)

__inline void	CopyTraceContextIdentifier (PObject &obj) const

__inline void	CopyTraceContextIdentifier (PObject *obj) const

virtual	~PObject ()

__inline const char *	GetClass () const

__inline bool	IsClass (const char *name) const

__inline const PObject *	PTraceObjectInstance () const

virtual PObject *	Clone () const
	Create a copy of the class on the heap. More...

template<class CLS >
CLS *	CloneAs () const
	As for Clone() but converts to specified type. More...

virtual PINDEX	HashFunction () const
	This function yields a hash value required by the `PDictionary` class. More...

virtual Comparison	CompareObjectMemoryDirect (const PObject &obj) const
	Determine the byte wise comparison of two objects. More...

bool	operator== (const PObject &obj) const
	Compare the two objects. More...

bool	operator!= (const PObject &obj) const
	Compare the two objects. More...

bool	operator< (const PObject &obj) const
	Compare the two objects. More...

bool	operator> (const PObject &obj) const
	Compare the two objects. More...

bool	operator<= (const PObject &obj) const
	Compare the two objects. More...

bool	operator>= (const PObject &obj) const
	Compare the two objects. More...

virtual void	ReadFrom (istream &strm)
	Input the contents of the object from the stream. More...

Protected Member Functions
virtual bool	InternalGetFrameData (BYTE *buffer, PINDEX &bytesReturned, bool &keyFrame, bool wait)

virtual bool	InternalReadFrameData (BYTE *frame)=0

Protected Member Functions inherited from PVideoDevice
	PVideoDevice ()
	Create a new video device (input or output). More...

PINDEX	GetMaxFrameBytesConverted (PINDEX rawFrameBytes) const

PString	GetDeviceNameFromOpenArgs (const OpenArgs &args) const

PString	ParseDeviceNameTokenString (const char token, const char defaultValue)

int	ParseDeviceNameTokenInt (const char *token, int defaultValue)

uint64_t	ParseDeviceNameTokenUnsigned (const char *token, uint64_t defaultValue)

Protected Member Functions inherited from PObject
	PObject ()
	Constructor for PObject, made protected so cannot ever create one on its own. More...

Protected Attributes
PAdaptiveDelay	m_pacing

unsigned	m_fixedFrameRate

unsigned	m_frameRateAdjust

unsigned	m_frameNumber

Protected Attributes inherited from PVideoInputDevice
PVideoControlInfo	m_controlInfo [PVideoControlInfo::NumTypes]

Protected Attributes inherited from PVideoDevice
PCaselessString	m_deviceName

int	m_lastError

VideoFormat	m_videoFormat

int	m_channelNumber

PString	m_preferredColourFormat

bool	m_nativeVerticalFlip

PColourConverter *	m_converter

PBYTEArray	m_frameStore

Protected Attributes inherited from PVideoFrameInfo
unsigned	m_frameWidth

unsigned	m_frameHeight

unsigned	m_sarWidth

unsigned	m_sarHeight

unsigned	m_frameRate

PString	m_colourFormat

ResizeMode	m_resizeMode

Protected Attributes inherited from PObject
unsigned	m_traceContextIdentifier

Additional Inherited Members
Static Public Member Functions inherited from PVideoInputDevice
static PStringArray	GetDriverNames (PPluginManager *pluginMgr=NULL)
	Get the list of available video input drivers (plug-ins) More...

static PStringArray	GetDriversDeviceNames (const PString &driverName, PPluginManager *pluginMgr=NULL)
	Get video input devices that correspond to the specified driver name. More...

static PVideoInputDevice *	CreateDevice (const PString &driverName, PPluginManager *pluginMgr=NULL)
	Create the video input device that corresponds to the specified driver name. More...

static PVideoInputDevice *	CreateDeviceByName (const PString &deviceName, const PString &driverName=PString::Empty(), PPluginManager *pluginMgr=NULL)

static PVideoInputDevice *	CreateOpenedDevice (const PString &driverName, const PString &deviceName, bool startImmediate=true, PPluginManager *pluginMgr=NULL)
	Create an opened video input device that corresponds to the specified names. More...

static PVideoInputDevice *	CreateOpenedDevice (const PString &deviceName, bool startImmediate=true, PPluginManager *pluginMgr=NULL)

static PVideoInputDevice *	CreateOpenedDevice (const OpenArgs &args, bool startImmediate=true)
	Create an opened video output device that corresponds to the specified arguments. More...

static bool	GetDeviceCapabilities (const PString &deviceName, Capabilities capabilities, PPluginManager pluginMgr=NULL)
	Retrieve a list of Device Capabilities for particular device. More...

static bool	GetDeviceCapabilities (const PString &deviceName, const PString &driverName, Capabilities caps, PPluginManager pluginMgr=NULL)
	Retrieve a list of Device Capabilities for a particular driver. More...

static PBoolean	GetInputDeviceCapabilities (const PString &, Capabilities *)

Static Public Member Functions inherited from PVideoFrameInfo
static const PString &	YUV420P ()

static PINDEX	CalculateFrameBytes (unsigned width, unsigned height, const PString &colourFormat=PVideoFrameInfo::YUV420P())

static bool	ParseSize (const PString &str, unsigned &width, unsigned &height)
	Parse the standard size string names. More...

static PString	AsString (unsigned width, unsigned height)
	Get a width/height as a standard size string name. More...

static PStringArray	GetSizeNames ()
	Get all "known" image size names. More...

Static Public Member Functions inherited from PObject
static __inline void	CopyTraceContextIdentifier (PObject &to, const PObject &from)

static __inline void	CopyTraceContextIdentifier (PObject &to, const PObject *from)

static __inline void	CopyTraceContextIdentifier (PObject *to, const PObject &from)

static __inline void	CopyTraceContextIdentifier (PObject to, const PObject from)

static __inline const char *	Class ()

static __inline const PObject *	PTraceObjectInstance (const char *)

static __inline const PObject *	PTraceObjectInstance (const PObject *obj)

template<typename T >
static Comparison	Compare2 (T v1, T v2)
	Compare two types, returning Comparison type. More...

static Comparison	InternalCompareObjectMemoryDirect (const PObject obj1, const PObject obj2, PINDEX size)
	Internal function caled from CompareObjectMemoryDirect() More...

Member Enumeration Documentation

anonymous enum

Enumerator
Channel_PlayAndClose
Channel_PlayAndRepeat
Channel_PlayAndKeepLast
Channel_PlayAndShowBlack
Channel_PlayAndShowWhite
ChannelCount

Constructor & Destructor Documentation

PVideoInputEmulatedDevice::PVideoInputEmulatedDevice ( )

explicit

PVideoInputEmulatedDevice::~PVideoInputEmulatedDevice ( )

Member Function Documentation

virtual PStringArray PVideoInputEmulatedDevice::GetChannelNames ( )

virtual

Get the names of video channels available on the device.

Reimplemented from PVideoDevice.

virtual PBoolean PVideoInputEmulatedDevice::GetFrameSizeLimits	(	unsigned &	minWidth,
		unsigned &	minHeight,
		unsigned &	maxWidth,
		unsigned &	maxHeight
	)

virtual

Get the minimum & maximum size of a frame on the device.

Default behaviour returns the value 1 to UINT_MAX for both and returns false.

Parameters

minHeight	Variable to receive minimum width
maxWidth	Variable to receive minimum height
maxHeight	Variable to receive maximum width Variable to receive maximum height

Reimplemented from PVideoDevice.

virtual int PVideoInputEmulatedDevice::GetNumChannels ( )

virtual

Get the number of video channels available on the device.

0 (default) = play file and close device 1 = play file and repeat 2 = play file and replay last frame 3 = play file and display black frame

Default behaviour returns 4.

Reimplemented from PVideoDevice.

virtual bool PVideoInputEmulatedDevice::InternalGetFrameData	(	BYTE *	buffer,
		PINDEX &	bytesReturned,
		bool &	keyFrame,
		bool	wait
	)

protectedvirtual

Implements PVideoInputDevice.

virtual bool PVideoInputEmulatedDevice::InternalReadFrameData ( BYTE * frame )

protectedpure virtual

PBoolean PVideoInputEmulatedDevice::IsCapturing ( )

virtual

Determine if the video device I/O capture is in progress.

Implements PVideoInputDevice.

virtual PBoolean PVideoInputEmulatedDevice::SetColourFormat ( const PString & colourFormat )

virtual

Set the colour format to be used.

Default behaviour sets the value of the colourFormat variable and then returns the IsOpen() status.

Reimplemented from PVideoFrameInfo.

virtual PBoolean PVideoInputEmulatedDevice::SetFrameRate ( unsigned rate )

virtual

Set the video frame rate to be used on the device.

Default behaviour sets the value of the frameRate variable and then return the IsOpen() status.

Parameters

rate	Frames per second

Reimplemented from PVideoFrameInfo.

virtual PBoolean PVideoInputEmulatedDevice::SetFrameSize	(	unsigned	width,
		unsigned	height
	)

virtual

Set the frame size to be used.

Default behaviour sets the frameWidth and frameHeight variables and returns the IsOpen() status.

Parameters

height New width of frame New height of frame

Reimplemented from PVideoDevice.

PBoolean PVideoInputEmulatedDevice::Start ( )

virtual

Start the video device I/O.

Implements PVideoDevice.

PBoolean PVideoInputEmulatedDevice::Stop ( )

virtual

Stop the video device I/O capture.

Implements PVideoDevice.

Member Data Documentation

unsigned PVideoInputEmulatedDevice::m_fixedFrameRate

protected

unsigned PVideoInputEmulatedDevice::m_frameNumber

protected

unsigned PVideoInputEmulatedDevice::m_frameRateAdjust

protected

PAdaptiveDelay PVideoInputEmulatedDevice::m_pacing

protected

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

videoio.h

Public Types

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation