MediaChannel Class

Transports peer-to-peer data between P2PTransportChannel (wrapped by VoiceChannel) and the hardware (wrapped by a MediaEngine subclass). This is a virtual class that must be implemented by a subclass for each MediaEngine subclass. This object is created by MediaEngine at the request of ChannelManager. Each VoiceChannel object has its own MediaChannel object. The methods shown are not thread-safe, and can be called on any thread.

Syntax

class MediaChannel : public sigslot::has_slots<>

Interfaces

Name	Description
cricket::MediaChannel::NetworkInterface	This interface defines a single method, SendPacket, which is called by the MediaEngine subclass to send a packet of data to the P2PTransportChannel through VoiceChannel. void SendPacket(const void *data, size_t len) = 0 Sends a block of data of size_t bytes out to the other computer. This method is implemented by VoiceChannel.

Methods

Name	Description
virtual int GetOutputLevel() = 0	Returns a number indicating the output volume.
MediaChannel()	Constructor. Sets the initial network interface to NULL; you must call SetInterface before you can use the object.
~MediaChannel	Destructor.
NetworkInterface* network_interface()	Returns the NetworkInterface object used to send peer-to-peer data to another computer.
virtual void OnPacketReceived(const void *data, int len)=0	Called by VoiceChannel with an incoming packet of audio data.
virtual void SetCodecs(const std::vector<Codec> &codecs)=0	Specifies the codecs that the MediaEngine should use.
void SetInterface(NetworkInterface *iface)	Sets the NetworkInterface object that handles sending packets of data. VoiceChannel calls this method, passing in a pointer to itself.
virtual void SetPlayout(bool playout)=0	Specifies whether to enable audio rendering. True means that it should be enabled.
virtual void SetSend(bool send)=0	Specifies whether to enable audio capture. True means that it should be enabled.

 

Attributes: public

Declaration file: talk/session/phone/mediachannel.h