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118 lines
3.4 KiB
118 lines
3.4 KiB
/*
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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 sems 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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/** @file AmMultiPartyMixer.h */
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#ifndef _MultiPartyMixer_h_
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#define _MultiPartyMixer_h_
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#include "AmAudio.h"
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#include "AmThread.h"
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#include "SampleArray.h"
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//#define RORPP_PLC
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#ifdef RORPP_PLC
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#include "LowcFE.h"
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#endif
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#include <map>
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#include <set>
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struct MixerBufferState
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{
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typedef std::map<int,SampleArrayShort*> ChannelMap;
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unsigned int sample_rate;
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unsigned int last_ts;
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ChannelMap channels;
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SampleArrayInt *mixed_channel;
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MixerBufferState(unsigned int sample_rate, std::set<int>& channelids);
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MixerBufferState(const MixerBufferState& other);
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~MixerBufferState();
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void add_channel(unsigned int channel_id);
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void remove_channel(unsigned int channel_id);
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SampleArrayShort* get_channel(unsigned int channel_id);
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void fix_channels(std::set<int>& curchannelids);
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void free_channels();
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};
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/**
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* \brief Mixer for one conference.
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*
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* AmMultiPartyMixer mixes the audio from all channels,
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* and returns the audio of all other channels.
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*/
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class AmMultiPartyMixer
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{
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typedef std::set<int> ChannelIdSet;
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typedef std::map<int,int> SampleRateMap;
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typedef std::multiset<int> SampleRateSet;
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SampleRateMap sampleratemap;
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SampleRateSet samplerates;
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ChannelIdSet channelids;
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std::deque<MixerBufferState> buffer_state;
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AmMutex audio_mut;
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int scaling_factor;
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int tmp_buffer[AUDIO_BUFFER_SIZE/2];
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std::deque<MixerBufferState>::iterator findOrCreateBufferState(unsigned int sample_rate);
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std::deque<MixerBufferState>::iterator findBufferStateForReading(unsigned int sample_rate,
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unsigned long long last_ts);
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void cleanupBufferStates(unsigned int last_ts);
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void mix_add(int* dest,int* src1,short* src2,unsigned int size);
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void mix_sub(int* dest,int* src1,short* src2,unsigned int size);
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void scale(short* buffer,int* tmp_buf,unsigned int size);
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public:
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AmMultiPartyMixer();
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~AmMultiPartyMixer();
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unsigned int addChannel(unsigned int external_sample_rate);
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void removeChannel(unsigned int channel_id);
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void PutChannelPacket(unsigned int channel_id,
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unsigned long long system_ts,
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unsigned char* buffer,
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unsigned int size);
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void GetChannelPacket(unsigned int channel,
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unsigned long long system_ts,
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unsigned char* buffer,
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unsigned int& size,
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unsigned int& output_sample_rate);
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int GetCurrentSampleRate();
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void lock();
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void unlock();
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};
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#endif
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