conference.h

基于sip协议的网络电话源码

 * @param samples_per_frame Number of samples per frame.
 * @param bits_per_sample   Number of bits per sample.
 * @param options	    Options (should be zero at the moment).
 * @param p_slot	    Pointer to receive the slot index of the port in
 *			    the conference bridge.
 * @param p_port	    Pointer to receive the port instance.
 *
 * @return		    PJ_SUCCESS on success, or the appropriate error 
 *			    code.
 */
PJ_DECL(pj_status_t) pjmedia_conf_add_passive_port( pjmedia_conf *conf,
						    pj_pool_t *pool,
						    const pj_str_t *name,
						    unsigned clock_rate,
						    unsigned channel_count,
						    unsigned samples_per_frame,
						    unsigned bits_per_sample,
						    unsigned options,
						    unsigned *p_slot,
						    pjmedia_port **p_port );


/**
 * Change TX and RX settings for the port.
 *
 * @param conf		The conference bridge.
 * @param slot		Port number/slot in the conference bridge.
 * @param tx		Settings for the transmission TO this port.
 * @param rx		Settings for the receipt FROM this port.
 *
 * @return		PJ_SUCCESS on success.
 */
PJ_DECL(pj_status_t) pjmedia_conf_configure_port( pjmedia_conf *conf,
						  unsigned slot,
						  pjmedia_port_op tx,
						  pjmedia_port_op rx);


/**
 * Enable unidirectional audio from the specified source slot to the
 * specified sink slot.
 *
 * @param conf		The conference bridge.
 * @param src_slot	Source slot.
 * @param sink_slot	Sink slot.
 * @param level		This argument is reserved for future improvements
 *			where it is possible to adjust the level of signal
 *			transmitted in a specific connection. For now,
 *			this argument MUST be zero.
 *
 * @return		PJ_SUCCES on success.
 */
PJ_DECL(pj_status_t) pjmedia_conf_connect_port( pjmedia_conf *conf,
						unsigned src_slot,
						unsigned sink_slot,
						int level );


/**
 * Disconnect unidirectional audio from the specified source to the specified
 * sink slot.
 *
 * @param conf		The conference bridge.
 * @param src_slot	Source slot.
 * @param sink_slot	Sink slot.
 *
 * @return		PJ_SUCCESS on success.
 */
PJ_DECL(pj_status_t) pjmedia_conf_disconnect_port( pjmedia_conf *conf,
						   unsigned src_slot,
						   unsigned sink_slot );


/**
 * Get total number of ports connections currently set up in the bridge.
 * 
 * @param conf		The conference bridge.
 *
 * @return		PJ_SUCCESS on success.
 */
PJ_DECL(unsigned) pjmedia_conf_get_connect_count(pjmedia_conf *conf);


/**
 * Remove the specified port from the conference bridge.
 *
 * @param conf		The conference bridge.
 * @param slot		The port index to be removed.
 *
 * @return		PJ_SUCCESS on success.
 */
PJ_DECL(pj_status_t) pjmedia_conf_remove_port( pjmedia_conf *conf,
					       unsigned slot );



/**
 * Enumerate occupied ports in the bridge.
 *
 * @param conf		The conference bridge.
 * @param ports		Array of port numbers to be filled in.
 * @param count		On input, specifies the maximum number of ports
 *			in the array. On return, it will be filled with
 *			the actual number of ports.
 *
 * @return		PJ_SUCCESS on success.
 */
PJ_DECL(pj_status_t) pjmedia_conf_enum_ports( pjmedia_conf *conf,
					      unsigned ports[],
					      unsigned *count );


/**
 * Get port info.
 *
 * @param conf		The conference bridge.
 * @param slot		Port index.
 * @param info		Pointer to receive the info.
 *
 * @return		PJ_SUCCESS on success.
 */
PJ_DECL(pj_status_t) pjmedia_conf_get_port_info( pjmedia_conf *conf,
						 unsigned slot,
						 pjmedia_conf_port_info *info);


/**
 * Get occupied ports info.
 *
 * @param conf		The conference bridge.
 * @param size		On input, contains maximum number of infos
 *			to be retrieved. On output, contains the actual
 *			number of infos that have been copied.
 * @param info		Array of info.
 *
 * @return		PJ_SUCCESS on success.
 */
PJ_DECL(pj_status_t) pjmedia_conf_get_ports_info(pjmedia_conf *conf,
						 unsigned *size,
						 pjmedia_conf_port_info info[]
						 );


/**
 * Get last signal level transmitted to or received from the specified port.
 * This will retrieve the "real-time" signal level of the audio as they are
 * transmitted or received by the specified port. Application may call this
 * function periodically to display the signal level to a VU meter.
 *
 * The signal level is an integer value in zero to 255, with zero indicates
 * no signal, and 255 indicates the loudest signal level.
 *
 * @param conf		The conference bridge.
 * @param slot		Slot number.
 * @param tx_level	Optional argument to receive the level of signal
 *			transmitted to the specified port (i.e. the direction
 *			is from the bridge to the port).
 * @param rx_level	Optional argument to receive the level of signal
 *			received from the port (i.e. the direction is from the
 *			port to the bridge).
 *
 * @return		PJ_SUCCESS on success.
 */
PJ_DECL(pj_status_t) pjmedia_conf_get_signal_level(pjmedia_conf *conf,
						   unsigned slot,
						   unsigned *tx_level,
						   unsigned *rx_level);


/**
 * Adjust the level of signal received from the specified port.
 * Application may adjust the level to make signal received from the port
 * either louder or more quiet. The level adjustment is calculated with this
 * formula: <b><tt>output = input * (adj_level+128) / 128</tt></b>. Using 
 * this, zero indicates no adjustment, the value -128 will mute the signal, 
 * and the value of +128 will make the signal 100% louder, +256 will make it
 * 200% louder, etc.
 *
 * The level adjustment value will stay with the port until the port is
 * removed from the bridge or new adjustment value is set. The current
 * level adjustment value is reported in the media port info when
 * the #pjmedia_conf_get_port_info() function is called.
 *
 * @param conf		The conference bridge.
 * @param slot		Slot number of the port.
 * @param adj_level	Adjustment level, which must be greater than or equal
 *			to -128. A value of zero means there is no level
 *			adjustment to be made, the value -128 will mute the 
 *			signal, and the value of +128 will make the signal 
 *			100% louder, +256 will make it 200% louder, etc. 
 *			See the function description for the formula.
 *
 * @return		PJ_SUCCESS on success.
 */
PJ_DECL(pj_status_t) pjmedia_conf_adjust_rx_level( pjmedia_conf *conf,
						   unsigned slot,
						   int adj_level );


/**
 * Adjust the level of signal to be transmitted to the specified port.
 * Application may adjust the level to make signal transmitted to the port
 * either louder or more quiet. The level adjustment is calculated with this
 * formula: <b><tt>output = input * (adj_level+128) / 128</tt></b>. Using 
 * this, zero indicates no adjustment, the value -128 will mute the signal, 
 * and the value of +128 will make the signal 100% louder, +256 will make it
 * 200% louder, etc.
 *
 * The level adjustment value will stay with the port until the port is
 * removed from the bridge or new adjustment value is set. The current
 * level adjustment value is reported in the media port info when
 * the #pjmedia_conf_get_port_info() function is called.
 *
 * @param conf		The conference bridge.
 * @param slot		Slot number of the port.
 * @param adj_level	Adjustment level, which must be greater than or equal
 *			to -128. A value of zero means there is no level
 *			adjustment to be made, the value -128 will mute the 
 *			signal, and the value of +128 will make the signal 
 *			100% louder, +256 will make it 200% louder, etc. 
 *			See the function description for the formula.
 *
 * @return		PJ_SUCCESS on success.
 */
PJ_DECL(pj_status_t) pjmedia_conf_adjust_tx_level( pjmedia_conf *conf,
						   unsigned slot,
						   int adj_level );



PJ_END_DECL


/**
 * @}
 */


#endif	/* __PJMEDIA_CONF_H__ */