#include <mediastrm.h>
Inheritance diagram for OpalVideoMediaStream:
Public Member Functions | |
Construction | |
OpalVideoMediaStream (OpalConnection &conn, const OpalMediaFormat &mediaFormat, unsigned sessionID, PVideoInputDevice *inputDevice, PVideoOutputDevice *outputDevice, bool autoDeleteInput=true, bool autoDeleteOutput=true) | |
~OpalVideoMediaStream () | |
Overrides of PChannel class | |
virtual bool | InternalUpdateMediaFormat (const OpalMediaFormat &mediaFormat) |
virtual PBoolean | Open () |
virtual PBoolean | ReadData (BYTE *data, PINDEX size, PINDEX &length) |
virtual PBoolean | WriteData (const BYTE *data, PINDEX length, PINDEX &written) |
virtual PBoolean | IsSynchronous () const |
virtual PBoolean | SetDataSize (PINDEX dataSize, PINDEX frameTime) |
virtual PVideoInputDevice * | GetVideoInputDevice () const |
virtual PVideoOutputDevice * | GetVideoOutputDevice () const |
Protected Member Functions | |
virtual void | InternalClose () |
Protected Attributes | |
PVideoInputDevice * | m_inputDevice |
PVideoOutputDevice * | m_outputDevice |
bool | m_autoDeleteInput |
bool | m_autoDeleteOutput |
PTimeInterval | m_lastGrabTime |
OpalVideoMediaStream::OpalVideoMediaStream | ( | OpalConnection & | conn, | |
const OpalMediaFormat & | mediaFormat, | |||
unsigned | sessionID, | |||
PVideoInputDevice * | inputDevice, | |||
PVideoOutputDevice * | outputDevice, | |||
bool | autoDeleteInput = true , |
|||
bool | autoDeleteOutput = true | |||
) |
Construct a new media stream for channel.
conn | Connection that owns the stream |
mediaFormat | Media format for stream |
sessionID | Session number for stream |
inputDevice | Device to use for video grabbing |
outputDevice | Device to use for video display |
autoDeleteInput | Automatically delete PVideoInputDevice |
autoDeleteOutput | Automatically delete PVideoOutputDevice |
OpalVideoMediaStream::~OpalVideoMediaStream | ( | ) |
Delete attached channel if autoDelete enabled.
virtual PVideoInputDevice* OpalVideoMediaStream::GetVideoInputDevice | ( | ) | const [inline, virtual] |
Get the input device (e.g. for statistics)
virtual PVideoOutputDevice* OpalVideoMediaStream::GetVideoOutputDevice | ( | ) | const [inline, virtual] |
Get the output device (e.g. for statistics)
virtual void OpalVideoMediaStream::InternalClose | ( | ) | [protected, virtual] |
Close any internal components of the stream. This should be used in preference to overriding the Close() function as it is guaranteed to be called exactly once and avoids race conditions in the shut down sequence of a media stream.
Implements OpalMediaStream.
virtual bool OpalVideoMediaStream::InternalUpdateMediaFormat | ( | const OpalMediaFormat & | mediaFormat | ) | [virtual] |
Update the media format. This can be used to adjust the parameters of a codec at run time. Note you cannot change the basic media format, eg change GSM0610 to G.711, only options for that format, eg 6k3 mode to 5k3 mode in G.723.1. If the formats are different then a OpalMediaFormat::Merge() is performed.
mediaFormat | New media format |
Reimplemented from OpalMediaStream.
virtual PBoolean OpalVideoMediaStream::IsSynchronous | ( | ) | const [virtual] |
Indicate if the media stream is synchronous. Returns true for LID streams.
Implements OpalMediaStream.
virtual PBoolean OpalVideoMediaStream::Open | ( | ) | [virtual] |
Open the media stream.
The default behaviour sets the OpalLineInterfaceDevice format and calls Resume() on the associated OpalMediaPatch thread.
Reimplemented from OpalMediaStream.
virtual PBoolean OpalVideoMediaStream::ReadData | ( | BYTE * | data, | |
PINDEX | size, | |||
PINDEX & | length | |||
) | [virtual] |
Read raw media data from the source media stream. The default behaviour simply calls ReadPacket() on the data portion of the RTP_DataFrame and sets the frames timestamp and marker from the internal member variables of the media stream class.
data | Data buffer to read to |
size | Size of buffer |
length | Length of data actually read |
Reimplemented from OpalMediaStream.
virtual PBoolean OpalVideoMediaStream::SetDataSize | ( | PINDEX | dataSize, | |
PINDEX | frameTime | |||
) | [virtual] |
Override size of frame header is included
dataSize | New data size (in total) |
frameTime | Individual frame time (if applicable) |
Reimplemented from OpalMediaStream.
virtual PBoolean OpalVideoMediaStream::WriteData | ( | const BYTE * | data, | |
PINDEX | length, | |||
PINDEX & | written | |||
) | [virtual] |
Write raw media data to the sink media stream. The default behaviour calls WritePacket() on the data portion of the RTP_DataFrame and and sets the internal timestamp and marker from the member variables of the media stream class.
data | Data to write |
length | Length of data to read. |
written | Length of data actually written |
Reimplemented from OpalMediaStream.
bool OpalVideoMediaStream::m_autoDeleteInput [protected] |
bool OpalVideoMediaStream::m_autoDeleteOutput [protected] |
PVideoInputDevice* OpalVideoMediaStream::m_inputDevice [protected] |
PTimeInterval OpalVideoMediaStream::m_lastGrabTime [protected] |
PVideoOutputDevice* OpalVideoMediaStream::m_outputDevice [protected] |