fb276938aa
git-svn-id: http://yate.null.ro/svn/yate/trunk@5185 acf43c95-373e-0410-b603-e72c3f656dc1
183 lines
4.9 KiB
C++
183 lines
4.9 KiB
C++
/**
|
|
* gsmcodec.cpp
|
|
* This file is part of the YATE Project http://YATE.null.ro
|
|
*
|
|
* GSM 6.10 codec using libgsm
|
|
*
|
|
* Yet Another Telephony Engine - a fully featured software PBX and IVR
|
|
* Copyright (C) 2004-2006 Null Team
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#include <yatephone.h>
|
|
|
|
extern "C" {
|
|
#include <gsm.h>
|
|
|
|
typedef gsm_signal gsm_block[160];
|
|
}
|
|
|
|
using namespace TelEngine;
|
|
namespace { // anonymous
|
|
|
|
static TranslatorCaps caps[] = {
|
|
{ 0, 0 },
|
|
{ 0, 0 },
|
|
{ 0, 0 }
|
|
};
|
|
|
|
int count = 0;
|
|
|
|
class GsmPlugin : public Plugin, public TranslatorFactory
|
|
{
|
|
public:
|
|
GsmPlugin();
|
|
~GsmPlugin();
|
|
virtual void initialize() { }
|
|
virtual bool isBusy() const;
|
|
virtual DataTranslator* create(const DataFormat& sFormat, const DataFormat& dFormat);
|
|
virtual const TranslatorCaps* getCapabilities() const;
|
|
};
|
|
|
|
class GsmCodec : public DataTranslator
|
|
{
|
|
public:
|
|
GsmCodec(const char* sFormat, const char* dFormat, bool encoding);
|
|
~GsmCodec();
|
|
virtual unsigned long Consume(const DataBlock& data, unsigned long tStamp, unsigned long flags);
|
|
private:
|
|
bool m_encoding;
|
|
gsm m_gsm;
|
|
DataBlock m_data;
|
|
DataBlock m_outdata;
|
|
};
|
|
|
|
GsmCodec::GsmCodec(const char* sFormat, const char* dFormat, bool encoding)
|
|
: DataTranslator(sFormat,dFormat), m_encoding(encoding), m_gsm(0)
|
|
{
|
|
Debug(DebugAll,"GsmCodec::GsmCodec(\"%s\",\"%s\",%scoding) [%p]",
|
|
sFormat,dFormat, m_encoding ? "en" : "de",this);
|
|
count++;
|
|
m_gsm = ::gsm_create();
|
|
}
|
|
|
|
GsmCodec::~GsmCodec()
|
|
{
|
|
Debug(DebugAll,"GsmCodec::~GsmCodec() [%p]",this);
|
|
count--;
|
|
if (m_gsm) {
|
|
gsm temp = m_gsm;
|
|
m_gsm = 0;
|
|
::gsm_destroy(temp);
|
|
}
|
|
}
|
|
|
|
unsigned long GsmCodec::Consume(const DataBlock& data, unsigned long tStamp, unsigned long flags)
|
|
{
|
|
if (!(m_gsm && getTransSource()))
|
|
return 0;
|
|
if (data.null() && (flags & DataSilent))
|
|
return getTransSource()->Forward(data,tStamp,flags);
|
|
ref();
|
|
if (m_encoding && (tStamp != invalidStamp()) && !m_data.null())
|
|
tStamp -= (m_data.length() / 2);
|
|
m_data += data;
|
|
int frames,consumed;
|
|
if (m_encoding) {
|
|
frames = m_data.length() / sizeof(gsm_block);
|
|
consumed = frames * sizeof(gsm_block);
|
|
if (frames) {
|
|
m_outdata.resize(frames * sizeof(gsm_frame));
|
|
for (int i=0; i<frames; i++)
|
|
::gsm_encode(m_gsm,
|
|
(gsm_signal*)(((gsm_block *)m_data.data())+i),
|
|
(gsm_byte*)(((gsm_frame *)m_outdata.data())+i));
|
|
}
|
|
if (!tStamp)
|
|
tStamp = timeStamp() + (consumed / 2);
|
|
}
|
|
else {
|
|
frames = m_data.length() / sizeof(gsm_frame);
|
|
consumed = frames * sizeof(gsm_frame);
|
|
if (frames) {
|
|
m_outdata.resize(frames * sizeof(gsm_block));
|
|
for (int i=0; i<frames; i++)
|
|
::gsm_decode(m_gsm,
|
|
(gsm_byte*)(((gsm_frame *)m_data.data())+i),
|
|
(gsm_signal*)(((gsm_block *)m_outdata.data())+i));
|
|
}
|
|
if (!tStamp)
|
|
tStamp = timeStamp() + (frames*sizeof(gsm_block) / 2);
|
|
}
|
|
XDebug("GsmCodec",DebugAll,"%scoding %d frames of %d input bytes (consumed %d) in %d output bytes",
|
|
m_encoding ? "en" : "de",frames,m_data.length(),consumed,m_outdata.length());
|
|
unsigned long len = 0;
|
|
if (frames) {
|
|
m_data.cut(-consumed);
|
|
len = getTransSource()->Forward(m_outdata,tStamp,flags);
|
|
}
|
|
deref();
|
|
return len;
|
|
}
|
|
|
|
GsmPlugin::GsmPlugin()
|
|
: Plugin("gsmcodec"), TranslatorFactory("gsm")
|
|
{
|
|
Output("Loaded module GSM - based on libgsm-%d.%d.%d",GSM_MAJOR,GSM_MINOR,GSM_PATCHLEVEL);
|
|
const FormatInfo* f = FormatRepository::addFormat("gsm",33,20000);
|
|
caps[0].src = caps[1].dest = f;
|
|
caps[0].dest = caps[1].src = FormatRepository::getFormat("slin");
|
|
// FIXME: put proper conversion costs
|
|
caps[0].cost = caps[1].cost = 5;
|
|
}
|
|
|
|
GsmPlugin::~GsmPlugin()
|
|
{
|
|
Output("Unloading module GSM with %d codecs still in use",count);
|
|
}
|
|
|
|
bool GsmPlugin::isBusy() const
|
|
{
|
|
return (count != 0);
|
|
}
|
|
|
|
DataTranslator* GsmPlugin::create(const DataFormat& sFormat, const DataFormat& dFormat)
|
|
{
|
|
if (sFormat == "slin" && dFormat == "gsm")
|
|
return new GsmCodec(sFormat,dFormat,true);
|
|
else if (sFormat == "gsm" && dFormat == "slin")
|
|
return new GsmCodec(sFormat,dFormat,false);
|
|
else return 0;
|
|
}
|
|
|
|
const TranslatorCaps* GsmPlugin::getCapabilities() const
|
|
{
|
|
return caps;
|
|
}
|
|
|
|
INIT_PLUGIN(GsmPlugin);
|
|
|
|
UNLOAD_PLUGIN(unloadNow)
|
|
{
|
|
if (unloadNow)
|
|
return !__plugin.isBusy();
|
|
return true;
|
|
}
|
|
|
|
}; // anonymous namespace
|
|
|
|
/* vi: set ts=8 sw=4 sts=4 noet: */
|