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127 lines
3.0 KiB
127 lines
3.0 KiB
/*
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* $Id$
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*
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* Copyright (C) 2002-2003 Fhg Fokus
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*
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* This file is part of sems, a free SIP media server.
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*
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* sems is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version
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*
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* For a license to use the ser software under conditions
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* other than those described here, or to purchase support for this
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* software, please contact iptel.org by e-mail at the following addresses:
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* info@iptel.org
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*
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* sems is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _AmRtpAudio_h_
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#define _AmRtpAudio_h_
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#include "AmAudio.h"
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#include "AmRtpStream.h"
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#include "LowcFE.h"
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class AmPlayoutBuffer;
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enum PlayoutType {
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ADAPTIVE_PLAYOUT,
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JB_PLAYOUT,
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SIMPLE_PLAYOUT
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};
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/**
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* \brief interface for PLC buffer
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*/
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class AmPLCBuffer {
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public:
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virtual void add_to_history(int16_t *buffer, unsigned int size) = 0;
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// Conceals packet loss into the out_buffer
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// @return length in bytes of the recivered segment
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virtual unsigned int conceal_loss(unsigned int ts_diff, unsigned char *out_buffer) = 0;
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AmPLCBuffer() { }
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virtual ~AmPLCBuffer() { }
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};
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/**
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* \brief binds together a \ref AmRtpStream and an \ref AmAudio for a session
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*/
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class AmRtpAudio: public AmRtpStream, public AmAudio, public AmPLCBuffer
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{
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auto_ptr<AmPlayoutBuffer> playout_buffer;
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LowcFE fec;
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bool use_default_plc;
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unsigned int last_check;
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bool last_check_i;
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bool send_int;
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bool send_only;
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//
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// Default packet loss concealment functions
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//
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unsigned int default_plc(unsigned char* out_buf,
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unsigned int size,
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unsigned int channels,
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unsigned int rate);
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public:
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AmRtpAudio(AmSession* _s=0);
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bool checkInterval(unsigned int ts);
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bool sendIntReached();
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void setCurrentPayload(int payload);
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int receive(unsigned int wallclock_ts);
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void setSendOnly(bool so){
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send_only = so;
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}
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// AmAudio interface
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int read(unsigned int user_ts, unsigned int size);
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int write(unsigned int user_ts, unsigned int size);
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int get(unsigned int user_ts, unsigned char* buffer,
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unsigned int nb_samples);
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// AmRtpStream interface
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void init(const vector<SdpPayload*>& sdp_payloads);
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void setPlayoutType(PlayoutType type);
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virtual unsigned int bytes2samples(unsigned int) const;
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void add_to_history(int16_t *buffer, unsigned int size);
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// Conceals packet loss into the out_buffer
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// @return length in bytes of the recivered segment
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unsigned int conceal_loss(unsigned int ts_diff, unsigned char *out_buffer);
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};
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#endif
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