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Added API and command to reload configuration of a single plugin. git-svn-id: http://yate.null.ro/svn/yate/trunk@4203 acf43c95-373e-0410-b603-e72c3f656dc1
181 lines
4.8 KiB
C++
181 lines
4.8 KiB
C++
/**
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* gsmcodec.cpp
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* This file is part of the YATE Project http://YATE.null.ro
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*
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* GSM 6.10 codec using libgsm
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*
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* Yet Another Telephony Engine - a fully featured software PBX and IVR
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* Copyright (C) 2004-2006 Null Team
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*
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* This program 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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* This program 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <yatephone.h>
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extern "C" {
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#include <gsm.h>
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typedef gsm_signal gsm_block[160];
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}
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using namespace TelEngine;
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namespace { // anonymous
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static TranslatorCaps caps[] = {
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{ 0, 0 },
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{ 0, 0 },
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{ 0, 0 }
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};
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int count = 0;
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class GsmPlugin : public Plugin, public TranslatorFactory
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{
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public:
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GsmPlugin();
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~GsmPlugin();
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virtual void initialize() { }
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virtual bool isBusy() const;
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virtual DataTranslator* create(const DataFormat& sFormat, const DataFormat& dFormat);
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virtual const TranslatorCaps* getCapabilities() const;
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};
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class GsmCodec : public DataTranslator
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{
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public:
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GsmCodec(const char* sFormat, const char* dFormat, bool encoding);
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~GsmCodec();
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virtual unsigned long Consume(const DataBlock& data, unsigned long tStamp, unsigned long flags);
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private:
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bool m_encoding;
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gsm m_gsm;
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DataBlock m_data;
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DataBlock m_outdata;
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};
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GsmCodec::GsmCodec(const char* sFormat, const char* dFormat, bool encoding)
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: DataTranslator(sFormat,dFormat), m_encoding(encoding), m_gsm(0)
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{
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Debug(DebugAll,"GsmCodec::GsmCodec(\"%s\",\"%s\",%scoding) [%p]",
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sFormat,dFormat, m_encoding ? "en" : "de",this);
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count++;
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m_gsm = ::gsm_create();
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}
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GsmCodec::~GsmCodec()
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{
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Debug(DebugAll,"GsmCodec::~GsmCodec() [%p]",this);
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count--;
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if (m_gsm) {
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gsm temp = m_gsm;
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m_gsm = 0;
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::gsm_destroy(temp);
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}
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}
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unsigned long GsmCodec::Consume(const DataBlock& data, unsigned long tStamp, unsigned long flags)
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{
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if (!(m_gsm && getTransSource()))
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return 0;
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if (data.null() && (flags & DataSilent))
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return getTransSource()->Forward(data,tStamp,flags);
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ref();
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m_data += data;
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int frames,consumed;
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if (m_encoding) {
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frames = m_data.length() / sizeof(gsm_block);
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consumed = frames * sizeof(gsm_block);
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if (frames) {
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m_outdata.resize(frames * sizeof(gsm_frame));
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for (int i=0; i<frames; i++)
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::gsm_encode(m_gsm,
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(gsm_signal*)(((gsm_block *)m_data.data())+i),
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(gsm_byte*)(((gsm_frame *)m_outdata.data())+i));
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}
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if (!tStamp)
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tStamp = timeStamp() + (consumed / 2);
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}
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else {
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frames = m_data.length() / sizeof(gsm_frame);
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consumed = frames * sizeof(gsm_frame);
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if (frames) {
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m_outdata.resize(frames * sizeof(gsm_block));
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for (int i=0; i<frames; i++)
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::gsm_decode(m_gsm,
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(gsm_byte*)(((gsm_frame *)m_data.data())+i),
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(gsm_signal*)(((gsm_block *)m_outdata.data())+i));
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}
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if (!tStamp)
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tStamp = timeStamp() + (frames*sizeof(gsm_block) / 2);
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}
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XDebug("GsmCodec",DebugAll,"%scoding %d frames of %d input bytes (consumed %d) in %d output bytes",
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m_encoding ? "en" : "de",frames,m_data.length(),consumed,m_outdata.length());
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unsigned long len = 0;
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if (frames) {
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m_data.cut(-consumed);
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len = getTransSource()->Forward(m_outdata,tStamp,flags);
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}
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deref();
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return len;
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}
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GsmPlugin::GsmPlugin()
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: Plugin("gsmcodec"), TranslatorFactory("gsm")
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{
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Output("Loaded module GSM - based on libgsm-%d.%d.%d",GSM_MAJOR,GSM_MINOR,GSM_PATCHLEVEL);
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const FormatInfo* f = FormatRepository::addFormat("gsm",33,20000);
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caps[0].src = caps[1].dest = f;
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caps[0].dest = caps[1].src = FormatRepository::getFormat("slin");
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// FIXME: put proper conversion costs
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caps[0].cost = caps[1].cost = 5;
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}
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GsmPlugin::~GsmPlugin()
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{
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Output("Unloading module GSM with %d codecs still in use",count);
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}
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bool GsmPlugin::isBusy() const
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{
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return (count != 0);
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}
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DataTranslator* GsmPlugin::create(const DataFormat& sFormat, const DataFormat& dFormat)
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{
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if (sFormat == "slin" && dFormat == "gsm")
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return new GsmCodec(sFormat,dFormat,true);
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else if (sFormat == "gsm" && dFormat == "slin")
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return new GsmCodec(sFormat,dFormat,false);
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else return 0;
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}
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const TranslatorCaps* GsmPlugin::getCapabilities() const
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{
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return caps;
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}
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INIT_PLUGIN(GsmPlugin);
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UNLOAD_PLUGIN(unloadNow)
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{
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if (unloadNow)
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return !__plugin.isBusy();
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return true;
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}
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}; // anonymous namespace
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/* vi: set ts=8 sw=4 sts=4 noet: */
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