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85 lines
2.2 KiB
85 lines
2.2 KiB
/*
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* $Id: AmDtmfDetector.h,v 1.1.2.1 2005/06/01 12:00:24 rco Exp $
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*
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* Copyright (C) 2006 Sippy Software, Inc.
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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 _AmJitterBuffer_h_
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#define _AmJitterBuffer_h_
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#include "AmThread.h"
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#include "AmRtpPacket.h"
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class AmRtpStream;
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#define INITIAL_JITTER 640 // 80 miliseconds
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#define MAX_JITTER 16000 // 2 seconds
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#define RESYNC_THRESHOLD 10
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class Packet {
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public:
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AmRtpPacket m_packet;
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Packet *m_next;
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Packet *m_prev;
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bool operator < (const Packet&) const;
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};
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class PacketAllocator
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{
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private:
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Packet m_packets[MAX_JITTER / 80];
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Packet *m_free_packets;
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public:
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PacketAllocator();
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Packet *alloc(const AmRtpPacket *);
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void free(Packet *p);
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};
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class AmJitterBuffer
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{
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private:
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AmMutex m_mutex;
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PacketAllocator m_allocator;
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Packet *m_head;
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Packet *m_tail;
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bool m_tsInited;
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unsigned int m_lastTs;
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unsigned int m_lastResyncTs;
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unsigned int m_lastAudioTs;
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unsigned int m_tsDelta;
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bool m_tsDeltaInited;
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int m_delayCount;
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unsigned int m_jitter;
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AmRtpStream *m_owner;
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public:
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AmJitterBuffer(AmRtpStream *owner);
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void put(const AmRtpPacket *);
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bool get(AmRtpPacket &, unsigned int ts, unsigned int ms);
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};
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#endif // _AmJitterBuffer_h_
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