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124 lines
3.8 KiB
124 lines
3.8 KiB
/*
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* Copyright (C) 2008 IPTEGO GmbH
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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. This program is released under
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* the GPL with the additional exemption that compiling, linking,
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* and/or using OpenSSL is allowed.
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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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#include "AmAudioMixer.h"
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AmAudioMixer::AmAudioMixer(int external_sample_rate) {
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sink_channel = mixer.addChannel(external_sample_rate);
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sink_connector =
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new AmAudioMixerConnector(mixer, sink_channel, NULL,
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&srcsink_mut, &sinks);
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}
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AmAudioMixer::~AmAudioMixer() {
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mixer.removeChannel(sink_channel);
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for (std::map<AmAudioMixerConnector*, unsigned int>::iterator
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it=sources.begin(); it != sources.end(); it++) {
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mixer.removeChannel(it->second);
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delete it->first;
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}
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delete sink_connector;
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}
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AmAudio* AmAudioMixer::addSource(int external_sample_rate) {
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srcsink_mut.lock();
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unsigned int src_channel = mixer.addChannel(external_sample_rate);
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// the first source will process the media in the mixer channel
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AmAudioMixerConnector* conn =
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new AmAudioMixerConnector(mixer, src_channel,
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sources.empty() ? sink_connector : NULL);
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sources[conn] = src_channel;
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srcsink_mut.unlock();
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return conn;
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}
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void AmAudioMixer::releaseSource(AmAudio* s) {
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srcsink_mut.lock();
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std::map<AmAudioMixerConnector*, unsigned int>::iterator it=
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sources.find((AmAudioMixerConnector*)s);
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if (it==sources.end()) {
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srcsink_mut.unlock();
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ERROR("source [%p] is not part of this mixer.\n", s);
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return;
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}
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mixer.removeChannel(it->second);
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delete s;
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sources.erase(it);
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srcsink_mut.unlock();
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}
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void AmAudioMixer::addSink(AmAudio* s) {
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srcsink_mut.lock();
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sinks.insert(s);
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srcsink_mut.unlock();
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}
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void AmAudioMixer::releaseSink(AmAudio* s) {
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srcsink_mut.lock();
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sinks.erase(s);
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srcsink_mut.unlock();
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}
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int AmAudioMixerConnector::get(unsigned long long system_ts,
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unsigned char* buffer,
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int output_sample_rate,
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unsigned int nb_samples)
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{
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// in fact GCP here only needed for the mixed channel
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unsigned int mixer_sample_rate;
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mixer.GetChannelPacket(channel, system_ts, buffer,
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nb_samples, mixer_sample_rate);
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if ((audio_mut != NULL) && (sinks != NULL)) {
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audio_mut->lock();
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// write to all sinks
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for (std::set<AmAudio*>::iterator it=sinks->begin();
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it != sinks->end(); it++) {
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(*it)->put(system_ts, buffer, output_sample_rate, nb_samples);
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}
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audio_mut->unlock();
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}
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return nb_samples;
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}
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int AmAudioMixerConnector::put(unsigned long long system_ts,
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unsigned char* buffer,
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int input_sample_rate,
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unsigned int size)
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{
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mixer.PutChannelPacket(channel, system_ts, buffer, size);
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if (mix_channel != NULL) {
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// we are processing the media of the mixed channel as well
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ShortSample mix_buffer[SIZE_MIX_BUFFER];
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mix_channel->get(system_ts, (unsigned char*)mix_buffer,
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input_sample_rate, size);
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}
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return size;
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}
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