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Analyzer outputs quality estimation. git-svn-id: http://voip.null.ro/svn/yate@707 acf43c95-373e-0410-b603-e72c3f656dc1
416 lines
9.8 KiB
C++
416 lines
9.8 KiB
C++
/**
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* moh.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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* On hold (music) generator
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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, 2005 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., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/**
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* Hybrid of tonegen and extmodule. Module for playing music from external
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* processes. Data is read from shell processes started by commands defined
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* in configuration file. Data sources based on external processes are
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* shared by DataEndpoints so number of external processes is limited
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* by number of entries in configuration file.
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* Compiled from tonegen.cpp and extmodule.cpp
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* by Maciek Kaminski (maciejka_at_tiger.com.pl)
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*/
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#include <yatephone.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <signal.h>
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using namespace TelEngine;
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static Configuration s_cfg;
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static ObjList sources;
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static ObjList chans;
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static Mutex s_mutex(true);
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class MOHSource : public ThreadedSource
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{
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public:
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~MOHSource();
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virtual void run();
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inline const String &name()
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{ return m_name; }
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static MOHSource *getSource(const String &name);
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private:
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MOHSource(const String &name, const String &command_line);
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String m_name;
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String m_command_line;
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bool create();
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DataBlock m_data;
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pid_t m_pid;
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int m_in;
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bool m_swap;
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unsigned m_brate;
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u_int64_t m_time;
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String m_id;
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};
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class MOHChan : public CallEndpoint
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{
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public:
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MOHChan(const String &name);
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~MOHChan();
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virtual void disconnected(bool final, const char *reason);
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inline const String &id() const
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{ return m_id; }
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private:
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String m_id;
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static int s_nextid;
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};
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class MOHHandler : public MessageHandler
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{
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public:
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MOHHandler() : MessageHandler("call.execute") { }
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virtual bool received(Message &msg);
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};
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class AttachHandler : public MessageHandler
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{
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public:
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AttachHandler() : MessageHandler("chan.attach") { }
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virtual bool received(Message &msg);
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};
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class StatusHandler : public MessageHandler
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{
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public:
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StatusHandler() : MessageHandler("engine.status") { }
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virtual bool received(Message &msg);
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};
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class MOHPlugin : public Plugin
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{
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public:
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MOHPlugin();
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~MOHPlugin();
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virtual void initialize();
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private:
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MOHHandler *m_handler;
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};
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MOHSource::MOHSource(const String &name, const String &command_line)
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: ThreadedSource("slin"), m_name(name), m_command_line(command_line), m_swap(false), m_brate(16000)
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{
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Debug(DebugAll,"MOHSource::MOHSource(\"%s\", \"%s\") [%p]", name.c_str(), command_line.c_str(), this);
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}
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MOHSource::~MOHSource()
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{
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Lock lock(s_mutex);
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Debug(DebugAll,"MOHSource::~MOHSource() [%p]",this);
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sources.remove(this,false);
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if (m_pid > 0)
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::kill(m_pid,SIGTERM);
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if (m_in >= 0) {
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::close(m_in);
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m_in = -1;
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}
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}
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MOHSource *MOHSource::getSource(const String &name)
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{
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String cmd;
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ObjList *l = &sources;
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for (; l; l = l->next()) {
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MOHSource *t = static_cast<MOHSource *>(l->get());
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if (t && (t->name() == name)) {
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t->ref();
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return t;
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}
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}
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cmd = s_cfg.getValue("mohs", name);
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if (cmd) {
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MOHSource *s = new MOHSource(name, cmd);
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if(s->start()) {
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sources.append(s);
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return s;
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} else
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return (MOHSource *) NULL;
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} else
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return (MOHSource *) NULL;
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}
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bool MOHSource::create()
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{
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int pid;
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int ext2yate[2];
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int x;
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if (::pipe(ext2yate)) {
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Debug(DebugWarn, "Unable to create ext->yate pipe: %s",strerror(errno));
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return false;
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}
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pid = ::fork();
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if (pid < 0) {
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Debug(DebugWarn, "Failed to fork(): %s", strerror(errno));
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::close(ext2yate[0]);
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::close(ext2yate[1]);
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return false;
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}
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if (!pid) {
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/* In child - terminate all other threads if needed */
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Thread::preExec();
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/* Try to immunize child from ^C and ^\ */
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::signal(SIGINT,SIG_IGN);
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::signal(SIGQUIT,SIG_IGN);
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/* And restore default handlers for other signals */
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::signal(SIGTERM,SIG_DFL);
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::signal(SIGHUP,SIG_DFL);
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/* Redirect stdout */
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::dup2(ext2yate[1], STDOUT_FILENO);
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/* Close stdin */
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//::close(STDIN_FILENO);
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/* Close everything but stdin/out/ */
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for (x=STDERR_FILENO+1;x<1024;x++)
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::close(x);
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/* Execute script */
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if (debugAt(DebugInfo))
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::fprintf(stderr, "Execing '%s'\n", m_command_line.c_str());
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::execl("/bin/sh", "sh", "-c", m_command_line.c_str(), (char *)NULL);
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::fprintf(stderr, "Failed to execute '%s': %s\n", m_command_line.c_str(), strerror(errno));
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/* Shit happened. Die as quick and brutal as possible */
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::_exit(1);
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}
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Debug(DebugInfo,"Launched External Script %s, pid: %d", m_command_line.c_str(), pid);
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m_in = ext2yate[0];
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/* close what we're not using in the parent */
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close(ext2yate[1]);
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m_pid = pid;
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return true;
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}
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void MOHSource::run()
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{
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if (!create()) {
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m_pid = 0;
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return;
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}
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m_data.assign(0,(m_brate*20)/1000);
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int r = 0;
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u_int64_t tpos = Time::now();
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m_time = tpos;
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do {
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r = (m_in >= 0) ? ::read(m_in,m_data.data(),m_data.length()) : m_data.length();
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if (r < 0) {
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if (errno == EINTR) {
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r = 1;
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continue;
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}
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break;
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}
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if (r < (int)m_data.length())
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m_data.assign(m_data.data(),r);
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if (m_swap) {
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uint16_t* p = (uint16_t*)m_data.data();
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for (int i = 0; i < r; i+= 2) {
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*p = ntohs(*p);
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++p;
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}
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}
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int64_t dly = tpos - Time::now();
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if (dly > 0) {
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XDebug("MOH",DebugAll,"Sleeping for " FMT64 " usec",dly);
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::usleep((unsigned long)dly);
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}
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Forward(m_data);
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tpos += (r*1000000ULL/m_brate);
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} while (r > 0);
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}
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int MOHChan::s_nextid = 1;
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MOHChan::MOHChan(const String &name)
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: CallEndpoint("moh")
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{
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Debug(DebugAll,"MOHChan::MOHChan(\"%s\") [%p]",name.c_str(),this);
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Lock lock(s_mutex);
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m_id << "moh/" << s_nextid++;
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chans.append(this);
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MOHSource *s = MOHSource::getSource(name);
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if (s) {
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setSource(s);
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s->deref();
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}
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else
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Debug(DebugWarn,"No source '%s' in MOHChan [%p]", name.c_str(), this);
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}
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MOHChan::~MOHChan()
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{
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Debug(DebugAll,"MOHChan::~MOHChan() %s [%p]",m_id.c_str(),this);
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s_mutex.lock();
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chans.remove(this,false);
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s_mutex.unlock();
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}
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void MOHChan::disconnected(bool final, const char *reason)
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{
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Debugger debug("MOHChan::disconnected()"," '%s' [%p]",reason,this);
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}
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bool MOHHandler::received(Message &msg)
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{
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String dest(msg.getValue("callto"));
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if (dest.null())
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return false;
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Regexp r("^moh/\\(.*\\)$");
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if (!dest.matches(r))
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return false;
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String name = dest.matchString(1);
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CallEndpoint* ch = static_cast<CallEndpoint*>(msg.userData());
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if (ch) {
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MOHChan *mc = new MOHChan(name);
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if (ch->connect(mc,msg.getValue("reason"))) {
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msg.setParam("peerid",mc->id());
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mc->deref();
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}
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else {
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mc->destruct();
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return false;
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}
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}
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else {
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const char *targ = msg.getValue("target");
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if (!targ) {
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Debug(DebugWarn,"MOH outgoing call with no target!");
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return false;
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}
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Message m("call.route");
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m.addParam("id",dest);
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m.addParam("caller",dest);
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m.addParam("called",targ);
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if (Engine::dispatch(m)) {
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m = "call.execute";
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m.addParam("callto",m.retValue());
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m.retValue() = 0;
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MOHChan *mc = new MOHChan(dest.matchString(1).c_str());
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m.setParam("id",mc->id());
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m.userData(mc);
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if (Engine::dispatch(m)) {
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msg.setParam("id",mc->id());
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mc->deref();
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return true;
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}
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Debug(DebugWarn,"MOH outgoing call not accepted!");
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mc->destruct();
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}
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else
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Debug(DebugWarn,"MOH outgoing call but no route!");
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return false;
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}
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return true;
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}
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bool AttachHandler::received(Message &msg)
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{
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String src(msg.getValue("source"));
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if (src.null())
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return false;
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Regexp r("^moh/\\(.*\\)$");
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if (!src.matches(r))
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return false;
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src = src.matchString(1);
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CallEndpoint *ch = static_cast<CallEndpoint *>(msg.userData());
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if (ch) {
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Lock lock(s_mutex);
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MOHSource *t = MOHSource::getSource(src);
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if (t) {
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ch->setSource(t);
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t->deref();
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// Let the message flow if it wants to attach a consumer too
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return !msg.getValue("consumer");
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}
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Debug(DebugWarn,"No on-hold source '%s' could be attached to [%p]",src.c_str(),ch);
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}
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else
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Debug(DebugWarn,"On-hold '%s' attach request with no data channel!",src.c_str());
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return false;
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}
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bool StatusHandler::received(Message &msg)
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{
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const char *sel = msg.getValue("module");
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if (sel && ::strcmp(sel,"moh"))
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return false;
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msg.retValue() << "name=moh,type=misc"
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<< ";sources=" << sources.count()
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<< ",chans=" << chans.count() << "\n";
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return false;
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}
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MOHPlugin::MOHPlugin()
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: m_handler(0)
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{
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Output("Loaded module MOH");
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}
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MOHPlugin::~MOHPlugin()
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{
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Output("Unloading module MOH");
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ObjList *l = &chans;
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while (l) {
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MOHChan *t = static_cast<MOHChan *>(l->get());
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if (t)
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t->disconnect("shutdown");
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if (l->get() == t)
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l = l->next();
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}
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chans.clear();
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sources.clear();
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}
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void MOHPlugin::initialize()
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{
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Output("Initializing module MOH");
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s_cfg = Engine::configFile("moh");
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s_cfg.load();
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if (!m_handler) {
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m_handler = new MOHHandler;
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Engine::install(m_handler);
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Engine::install(new AttachHandler);
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Engine::install(new StatusHandler);
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}
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}
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INIT_PLUGIN(MOHPlugin);
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/* vi: set ts=8 sw=4 sts=4 noet: */
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