557 lines
13 KiB
C++
557 lines
13 KiB
C++
/**
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* osschan.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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* Oss driver
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* I have to thank you to Mark Spencer because some parts of the code have
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* been taken from chan_oss.c from asterisk.
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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 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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#include <yatephone.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <string.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <sys/ioctl.h>
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#include <sys/time.h>
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#if defined(__linux__)
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#include <linux/soundcard.h>
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#elif defined (__FreeBSD__)
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#include <machine/soundcard.h>
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#else
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#include <soundcard.h>
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#endif
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#define MIN_SWITCH_TIME 600
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using namespace TelEngine;
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class OssChan;
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OssChan *s_chan = 0;
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class OssSource : public ThreadedSource
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{
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public:
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OssSource(OssChan *chan)
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: m_chan(chan)
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{
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Debug(DebugAll,"OssSource::OssSource(%p) [%p]",chan,this);
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}
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bool init();
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~OssSource();
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virtual void run();
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virtual void cleanup();
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private:
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OssChan *m_chan;
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unsigned m_brate;
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unsigned m_total;
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};
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class OssConsumer : public DataConsumer
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{
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public:
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OssConsumer(OssChan *chan)
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: m_chan(chan)
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{
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Debug(DebugAll,"OssConsumer::OssConsumer(%p) [%p]",chan,this);
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}
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bool init();
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~OssConsumer();
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virtual void Consume(const DataBlock &data, unsigned long timeDelta);
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private:
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OssChan *m_chan;
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unsigned m_total;
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};
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class OssChan : public DataEndpoint
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{
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public:
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OssChan(String dev);
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bool init();
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~OssChan();
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int setformat();
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virtual void disconnected(bool final, const char *reason);
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int soundcard_setinput(bool force);
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int soundcard_setoutput(bool force);
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int time_has_passed(void);
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void answer();
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inline void setTarget(const char* target = 0)
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{ m_target = target; }
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inline const String& getTarget() const
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{ return m_target; }
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String m_dev;
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String m_target;
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int full_duplex;
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int m_fd;
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int readmode;
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struct timeval lasttime;
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};
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class OssHandler : public MessageHandler
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{
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public:
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OssHandler(const char *name) : MessageHandler(name) { }
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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 DropHandler : public MessageHandler
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{
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public:
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DropHandler(const char *name) : MessageHandler(name) { }
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virtual bool received(Message &msg);
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};
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class MasqHandler : public MessageHandler
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{
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public:
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MasqHandler(const char *name, int prio) : MessageHandler(name,prio) { }
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virtual bool received(Message &msg);
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};
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class OssPlugin : public Plugin
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{
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public:
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OssPlugin();
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virtual void initialize();
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virtual bool isBusy() const;
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private:
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OssHandler *m_handler;
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};
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bool OssSource::init()
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{
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m_brate = 16000;
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m_total = 0;
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if (m_chan->soundcard_setinput(false) < 0) {
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Debug(DebugWarn, "Unable to set input mode\n");
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return false;
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}
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start("OssSource");
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return true;
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}
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OssSource::~OssSource()
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{
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Debug(DebugAll,"OssSource::~OssSource() [%p] total=%u",this,m_total);
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if (m_chan->m_fd >= 0) {
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::close(m_chan->m_fd);
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m_chan->m_fd = -1;
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}
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}
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void OssSource::run()
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{
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int r = 0;
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unsigned long long tpos = Time::now();
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do {
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if (m_chan->m_fd < 0) {
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Thread::yield();
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r = 1;
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continue;
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}
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DataBlock data(0,480);
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r = ::read(m_chan->m_fd, data.data(), data.length());
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if (r < 0) {
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if (errno == EINTR || errno == EAGAIN) {
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Thread::yield();
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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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else if (r == 0)
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{
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Thread::yield();
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r =1;
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continue;
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}
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if (r < (int)data.length())
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data.assign(data.data(),r);
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long long dly = tpos - Time::now();
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if (dly > 0) {
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XDebug("OssSource",DebugAll,"Sleeping for %lld usec",dly);
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::usleep((unsigned long)dly);
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}
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Forward(data,data.length()/2);
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m_total += r;
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tpos += (r*1000000ULL/m_brate);
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} while (r > 0);
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Debug(DebugAll,"OssSource [%p] end of data",this);
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}
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void OssSource::cleanup()
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{
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Debug(DebugAll,"OssSource [%p] cleanup, total=%u",this,m_total);
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m_chan->disconnect();
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}
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bool OssConsumer::init()
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{
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m_total = 0;
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if (!m_chan->full_duplex) {
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/* If we're half duplex, we have to switch to read mode
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to honor immediate needs if necessary */
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if (m_chan->soundcard_setinput(true) < 0) {
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Debug(DebugWarn, "Unable to set device to input mode\n");
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return false;
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}
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return true;
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}
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int res = m_chan->soundcard_setoutput(false);
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if (res < 0) {
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Debug(DebugWarn, "Unable to set output device\n");
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return false;
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} else if (res > 0) {
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/* The device is still in read mode, and it's too soon to change it,
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so just pretend we wrote it */
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return true;
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}
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return true;
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}
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OssConsumer::~OssConsumer()
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{
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Debug(DebugAll,"OssConsumer::~OssConsumer() [%p] total=%u",this,m_total);
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if (m_chan->m_fd >= 0) {
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::close(m_chan->m_fd);
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m_chan->m_fd = -1;
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}
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}
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void OssConsumer::Consume(const DataBlock &data, unsigned long timeDelta)
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{
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if ((m_chan->m_fd >= 0) && !data.null()) {
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::write(m_chan->m_fd,data.data(),data.length());
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m_total += data.length();
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}
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}
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OssChan::OssChan(String dev)
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: DataEndpoint("oss"),m_dev(dev),full_duplex(0), m_fd(-1), readmode(1)
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{
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Debug(DebugAll,"OssChan::OssChan dev [%s] [%p]",dev.c_str(),this);
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s_chan = this;
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}
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OssChan::~OssChan()
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{
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Debug(DebugAll,"OssChan::~OssChan() [%p]",this);
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setTarget();
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s_chan = 0;
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}
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bool OssChan::init()
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{
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m_fd = ::open(m_dev, O_RDWR | O_NONBLOCK);
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if (m_fd < 0) {
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Debug(DebugWarn, "Unable to open %s: %s\n", m_dev.c_str(), strerror(errno));
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return false;
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}
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gettimeofday(&lasttime, NULL);
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setformat();
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if (!full_duplex)
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soundcard_setinput(true);
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OssSource *source = new OssSource(this);
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if (!source->init())
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{
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delete source;
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return false;
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}
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setSource(source);
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source->deref();
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OssConsumer *cons = new OssConsumer(this);
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if (!cons->init())
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{
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delete cons;
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return false;
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}
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setConsumer(cons);
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cons->deref();
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return true;
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}
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int OssChan::time_has_passed(void)
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{
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struct timeval tv;
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int ms;
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gettimeofday(&tv, NULL);
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ms = (tv.tv_sec - lasttime.tv_sec) * 1000 +
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(tv.tv_usec - lasttime.tv_usec) / 1000;
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if (ms > MIN_SWITCH_TIME)
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return -1;
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return 0;
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}
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int OssChan::setformat()
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{
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int fmt = AFMT_S16_LE;
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int res = ::ioctl(m_fd, SNDCTL_DSP_SETFMT, &fmt);
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if (res < 0) {
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Debug(DebugWarn, "Unable to set format to 16-bit signed\n");
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return -1;
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}
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res = ::ioctl(m_fd, SNDCTL_DSP_SETDUPLEX, 0);
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if (res >= 0) {
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Debug(DebugInfo,"OSS audio device is full duplex\n");
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full_duplex = -1;
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}
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fmt = 0;
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res = ::ioctl(m_fd, SNDCTL_DSP_STEREO, &fmt);
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if (res < 0) {
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Debug(DebugWarn, "Failed to set audio device to mono\n");
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return -1;
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}
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int desired = 8000;
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fmt = desired;
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res = ::ioctl(m_fd, SNDCTL_DSP_SPEED, &fmt);
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if (res < 0) {
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Debug(DebugWarn, "Failed to set audio device speed\n");
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return -1;
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}
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if (fmt != desired)
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Debug(DebugWarn, "Requested %d Hz, got %d Hz -- sound may be choppy\n", desired, fmt);
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fmt = (2 << 16) | 8;
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res = ::ioctl(m_fd, SNDCTL_DSP_SETFRAGMENT, &fmt);
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if (res < 0)
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Debug(DebugWarn, "Unable to set fragment size -- sound may be choppy\n");
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return 0;
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}
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int OssChan::soundcard_setinput(bool force)
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{
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if (full_duplex || (readmode && !force))
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return 0;
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readmode = -1;
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if (force || time_has_passed()) {
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ioctl(m_fd, SNDCTL_DSP_RESET);
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close(m_fd);
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/* dup2(0, sound); */
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m_fd = open(m_dev.c_str(), O_RDONLY | O_NONBLOCK);
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if (m_fd < 0) {
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Debug(DebugWarn, "Unable to re-open DSP device: %s\n", ::strerror(errno));
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return -1;
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}
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if (setformat()) {
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return -1;
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}
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return 0;
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}
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return 1;
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}
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int OssChan::soundcard_setoutput(bool force)
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{
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/* Make sure the soundcard is in output mode. */
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if (full_duplex || (!readmode && !force))
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return 0;
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readmode = 0;
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if (force || time_has_passed()) {
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::ioctl(m_fd, SNDCTL_DSP_RESET);
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/* Keep the same fd reserved by closing the sound device and copying stdin at the same
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time. */
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/* dup2(0, sound); */
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::close(m_fd);
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m_fd = open(m_dev.c_str(), O_WRONLY |O_NONBLOCK);
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if (m_fd < 0) {
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Debug(DebugWarn, "Unable to re-open DSP device: %s\n", strerror(errno));
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return -1;
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}
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if (setformat()) {
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return -1;
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}
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return 0;
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}
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return 1;
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}
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void OssChan::disconnected(bool final, const char *reason)
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{
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Debugger debug("OssChan::disconnected()"," '%s' [%p]",reason,this);
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setTarget();
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}
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void OssChan::answer()
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{
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Message* m = new Message("call.answered");
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m->addParam("driver","oss");
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String tmp("oss/");
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tmp += m_dev;
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m->addParam("id",tmp);
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if (m_target)
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m->addParam("targetid",m_target);
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Engine::enqueue(m);
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}
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bool OssHandler::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("^oss/\\(.*\\)$");
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if (!dest.matches(r))
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return false;
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if (s_chan)
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return false;
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OssChan *chan = new OssChan(dest.matchString(1).c_str());
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if (!chan->init())
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{
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chan->destruct();
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return false;
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}
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DataEndpoint *dd = static_cast<DataEndpoint *>(msg.userData());
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Debug(DebugInfo,"We are routing to device '%s'",dest.matchString(1).c_str());
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if (dd && chan->connect(dd)) {
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chan->setTarget(msg.getValue("id"));
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msg.addParam("targetid",dest);
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chan->answer();
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chan->deref();
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}
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else {
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const char *direct = msg.getValue("direct");
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if (direct)
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{
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Message m("call.execute");
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m.addParam("driver","oss");
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m.addParam("id",dest);
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m.addParam("caller",dest);
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m.addParam("callto",direct);
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m.userData(chan);
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if (Engine::dispatch(m)) {
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chan->setTarget(m.getValue("targetid"));
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msg.addParam("targetid",chan->getTarget());
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chan->deref();
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return true;
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}
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Debug(DebugFail,"OSS outgoing call not accepted!");
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chan->destruct();
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return false;
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}
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const char *targ = msg.getValue("target");
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if (!targ) {
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Debug(DebugWarn,"OSS outgoing call with no target!");
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chan->destruct();
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return false;
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}
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Message m("call.route");
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m.addParam("driver","oss");
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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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m.userData(chan);
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if (Engine::dispatch(m)) {
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chan->setTarget(m.getValue("targetid"));
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msg.addParam("targetid",chan->getTarget());
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chan->deref();
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return true;
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}
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Debug(DebugFail,"OSS outgoing call not accepted!");
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}
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else
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Debug(DebugWarn,"OSS outgoing call but no route!");
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chan->destruct();
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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 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,"oss"))
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return false;
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msg.retValue() << "name=oss,type=misc;osschan=" << (s_chan != 0 ) << "\n";
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return false;
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}
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bool DropHandler::received(Message &msg)
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{
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String id(msg.getValue("id"));
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if (id.null() || id.startsWith("oss/")) {
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if (s_chan) {
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Debug("OssDropper",DebugInfo,"Dropping call");
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s_chan->disconnect();
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}
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return !id.null();
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}
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return false;
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}
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bool MasqHandler::received(Message &msg)
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{
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String id(msg.getValue("id"));
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if (msg.getParam("message") && id.startsWith("oss/")) {
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msg = msg.getValue("message");
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msg.clearParam("message");
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if (s_chan) {
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msg.addParam("targetid",s_chan->getTarget());
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msg.userData(s_chan);
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}
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}
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return false;
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}
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OssPlugin::OssPlugin()
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: m_handler(0)
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{
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Output("Loaded module OssChan");
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}
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void OssPlugin::initialize()
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{
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Output("Initializing module OssChan");
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if (!m_handler) {
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m_handler = new OssHandler("call.execute");
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Engine::install(new DropHandler("call.drop"));
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Engine::install(new MasqHandler("chan.masquerade",10));
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Engine::install(m_handler);
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Engine::install(new StatusHandler);
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}
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}
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bool OssPlugin::isBusy() const
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{
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return (s_chan != 0);
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}
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INIT_PLUGIN(OssPlugin);
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/* vi: set ts=8 sw=4 sts=4 noet: */
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