698 lines
19 KiB
C++
698 lines
19 KiB
C++
/**
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* alsachan.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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* Alsa driver
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*
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* Copyright (C) 2005 Pablo Sampere
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* Derived from osschan.cpp Copyright (C) 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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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <string.h>
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#include <fcntl.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 ALSA_PCM_NEW_HW_PARAMS_API
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#include <alsa/asoundlib.h>
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#define MIN_SWITCH_TIME 600000
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using namespace TelEngine;
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namespace { // anonymous
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static Mutex s_mutex;
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class AlsaDevice;
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class AlsaSource : public ThreadedSource
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{
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public:
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AlsaSource(AlsaDevice* dev);
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~AlsaSource();
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bool init();
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virtual void run();
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virtual void cleanup();
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private:
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AlsaDevice* m_device;
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unsigned m_brate;
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unsigned m_total;
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};
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class AlsaConsumer : public DataConsumer
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{
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public:
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AlsaConsumer(AlsaDevice* dev);
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~AlsaConsumer();
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bool init();
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virtual void Consume(const DataBlock &data, unsigned long tStamp);
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private:
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AlsaDevice* m_device;
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unsigned m_total;
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};
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class AlsaDevice : public RefObject
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{
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public:
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AlsaDevice(const String& dev, bool init=false);
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~AlsaDevice();
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bool timePassed(void);
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bool open();
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int write(void *buffer, int frames);
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int read(void *buffer, int frames);
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inline bool closed() const
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{ return m_closed; }
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int m_fd;
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private:
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String m_dev;
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String m_dev_in;
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String m_dev_out;
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String m_initdata;
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bool m_closed;
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snd_pcm_t *m_handle_in;
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snd_pcm_t *m_handle_out;
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u_int64_t m_lastTime;
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};
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class AlsaChan : public CallEndpoint
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{
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public:
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AlsaChan(const String& dev);
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~AlsaChan();
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bool init();
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virtual void disconnected(bool final, const char *reason);
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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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private:
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String m_dev;
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String m_target;
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};
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class AlsaHandler : public MessageHandler
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{
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public:
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AlsaHandler(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 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 AlsaPlugin : public Plugin
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{
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public:
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AlsaPlugin();
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virtual void initialize();
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virtual bool isBusy() const;
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private:
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AlsaHandler *m_handler;
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};
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AlsaChan *s_chan = 0;
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AlsaDevice* s_dev = 0;
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bool AlsaSource::init()
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{
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m_brate = 16000;
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m_total = 0;
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start("AlsaSource",Thread::High);
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return true;
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}
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AlsaSource::AlsaSource(AlsaDevice* dev)
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: m_device(0)
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{
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Debug(DebugNote,"AlsaSource::AlsaSource(%p) [%p]",dev,this);
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dev->ref();
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m_device = dev;
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}
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AlsaSource::~AlsaSource()
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{
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Debug(DebugNote,"AlsaSource::~AlsaSource() [%p] total=%u",this,m_total);
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m_device->deref();
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}
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void AlsaSource::run()
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{
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int r = 0;
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//u_int64_t tpos = Time::now();
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DataBlock data(0,(m_brate*20)/1000);
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do {
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if (m_device->closed()) {
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m_device->open();
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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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r = m_device->read(data.data(), data.length()/2);
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if (r <= 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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if(((unsigned int)r)*2==data.length()) Forward(data);
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else{
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DataBlock d2(data.data(),r*2);
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Forward(d2);
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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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Debug("AlsaSource",DebugWarn,"Sleeping for " FMT64 " usec",dly);
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Thread::usleep((unsigned long)dly);
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}
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*/
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m_total += r;
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//tpos += (r*(u_int64_t)1000000/m_brate);
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} while (r > 0);
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Debug(DebugWarn,"AlsaSource [%p] end of data",this);
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}
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void AlsaSource::cleanup()
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{
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Debug(DebugNote,"AlsaSource [%p] cleanup, total=%u",this,m_total);
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}
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bool AlsaConsumer::init()
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{
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m_total = 0;
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return true;
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}
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AlsaConsumer::AlsaConsumer(AlsaDevice* dev)
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: m_device(0)
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{
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Debug(DebugNote,"AlsaConsumer::AlsaConsumer(%p) [%p]",dev,this);
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dev->ref();
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m_device = dev;
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}
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AlsaConsumer::~AlsaConsumer()
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{
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Debug(DebugNote,"AlsaConsumer::~AlsaConsumer() [%p] total=%u",this,m_total);
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m_device->deref();
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}
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void AlsaConsumer::Consume(const DataBlock &data, unsigned long tStamp)
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{
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if (m_device->closed() || data.null())
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return;
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m_device->write(data.data(),data.length()/2);
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m_total += data.length();
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}
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AlsaChan::AlsaChan(const String& dev)
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: CallEndpoint("alsa"),
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m_dev(dev)
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{
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Debug(DebugNote,"AlsaChan::AlsaChan dev [%s] [%p]",dev.c_str(),this);
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s_chan = this;
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}
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AlsaChan::~AlsaChan()
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{
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Debug(DebugNote,"AlsaChan::~AlsaChan() [%p]",this);
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setTarget();
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setSource();
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setConsumer();
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s_chan = 0;
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}
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bool AlsaChan::init()
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{
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if (s_dev)
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return false;
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AlsaDevice* dev = new AlsaDevice(m_dev,true);
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if (dev->closed()) {
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dev->deref();
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return false;
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}
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AlsaSource* source = new AlsaSource(dev);
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dev->deref();
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if (!source->init()) {
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source->deref();
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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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AlsaConsumer* cons = new AlsaConsumer(dev);
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if (!cons->init()) {
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cons->deref();
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setSource();
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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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AlsaDevice::AlsaDevice(const String& dev,bool init)
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: m_dev(dev), m_dev_in(dev), m_dev_out(dev), m_closed(true),
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m_handle_in(0), m_handle_out(0)
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{
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Debug(DebugNote,"AlsaDevice::AlsaDevice('%s') [%p]",m_dev.c_str(),this);
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if (!s_dev)
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s_dev = this;
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int p = dev.find('/');
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if (p>0) {
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m_dev_in = dev.substr(0,p);
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int q = dev.substr(p+1).find('/');
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m_dev_out = dev.substr(p+1,q);
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if (m_dev_out.null()) m_dev_out = m_dev_in;
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if(q>0) m_initdata = dev.substr(p+2+q);
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}
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if (init) open();
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};
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bool AlsaDevice::open()
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{
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int err;
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snd_pcm_hw_params_t *hw_params = NULL;
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unsigned int rate_in=8000;
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unsigned int rate_out=8000;
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int direction=0;
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snd_pcm_uframes_t period_size_in = 20 * 4;
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snd_pcm_uframes_t buffer_size_in= period_size_in * 16;
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snd_pcm_uframes_t period_size_out = 20 * 4;
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snd_pcm_uframes_t buffer_size_out= period_size_out * 16;
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snd_pcm_sw_params_t *swparams = NULL;
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Debug(DebugNote, "Opening ALSA input device\n");
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Lock lock(s_mutex);
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if ((err = snd_pcm_open (&m_handle_in, m_dev_in.c_str(), SND_PCM_STREAM_CAPTURE, 0)) < 0) {
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Debug(DebugWarn, "cannot open audio device %s (%s)\n", m_dev.c_str(),snd_strerror (err));
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return false;
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}
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if ((err = snd_pcm_hw_params_malloc (&hw_params)) < 0) {
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Debug(DebugWarn, "cannot allocate hardware parameter structure (%s)\n", snd_strerror (err));
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return false;
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}
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if ((err = snd_pcm_hw_params_any (m_handle_in, hw_params)) < 0) Debug(DebugWarn, "cannot initialize hardware parameter structure (%s)\n", snd_strerror (err));
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if ((err = snd_pcm_hw_params_set_access (m_handle_in, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) Debug(DebugWarn, "cannot set access type (%s)\n", snd_strerror (err));
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if ((err = snd_pcm_hw_params_set_format (m_handle_in, hw_params, SND_PCM_FORMAT_S16_LE)) < 0) Debug(DebugWarn, "cannot set sample format (%s)\n", snd_strerror (err));
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if ((err = snd_pcm_hw_params_set_rate_near (m_handle_in, hw_params, &rate_in, &direction)) < 0) Debug(DebugWarn, "cannot set sample rate (%s)\n", snd_strerror (err));
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if ((err = snd_pcm_hw_params_set_channels (m_handle_in, hw_params, 1)) < 0) Debug(DebugWarn, "cannot set channel count (%s)\n", snd_strerror (err));
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if ((err = snd_pcm_hw_params (m_handle_in, hw_params)) < 0) Debug(DebugWarn, "cannot set parameters (%s)\n", snd_strerror (err));
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snd_pcm_hw_params_free (hw_params);
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Debug(DebugNote, "Opening ALSA output device\n");
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if ((err = snd_pcm_open (&m_handle_out, m_dev_out.c_str(), SND_PCM_STREAM_PLAYBACK, 0)) < 0) {
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Debug(DebugWarn, "cannot open audio device %s (%s)\n", m_dev.c_str(), snd_strerror (err));
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return false;
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}
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if ((err = snd_pcm_hw_params_malloc (&hw_params)) < 0) {
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Debug(DebugWarn, "cannot allocate hardware parameter structure (%s)\n", snd_strerror (err));
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return false;
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}
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if ((err = snd_pcm_hw_params_any (m_handle_out, hw_params)) < 0) Debug(DebugWarn, "cannot initialize hardware parameter structure (%s)\n", snd_strerror (err));
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if ((err = snd_pcm_hw_params_set_access (m_handle_out, hw_params, SND_PCM_ACCESS_RW_INTERLEAVED)) < 0) Debug(DebugWarn, "cannot set access type (%s)\n", snd_strerror (err));
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if ((err = snd_pcm_hw_params_set_format (m_handle_out, hw_params, SND_PCM_FORMAT_S16_LE)) < 0) Debug(DebugWarn, "cannot set sample format (%s)\n", snd_strerror (err));
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if ((err = snd_pcm_hw_params_set_rate_near (m_handle_out, hw_params, &rate_out, 0)) < 0) Debug(DebugWarn, "cannot set sample rate (%s)\n", snd_strerror (err));
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if ((err = snd_pcm_hw_params_set_channels (m_handle_out, hw_params, 1)) < 0) Debug(DebugWarn, "cannot set channel count (%s)\n", snd_strerror (err));
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if ((err = snd_pcm_hw_params_set_period_size_near(m_handle_out, hw_params, &period_size_out, &direction)) < 0) Debug(DebugWarn, "cannot set period size (%s)\n", snd_strerror (err));
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if ((err = snd_pcm_hw_params_set_buffer_size_near(m_handle_out, hw_params, &buffer_size_out)) < 0) Debug(DebugWarn, "cannot set buffer size (%s)\n", snd_strerror (err));
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if ((err = snd_pcm_hw_params (m_handle_out, hw_params)) < 0) Debug(DebugWarn, "cannot set parameters (%s)\n", snd_strerror (err));
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snd_pcm_hw_params_free (hw_params);
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snd_pcm_uframes_t val;
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snd_pcm_sw_params_alloca(&swparams);
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snd_pcm_sw_params_current(m_handle_out, swparams);
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if ((err = snd_pcm_sw_params_get_start_threshold( swparams, &val)) < 0) Debug(DebugWarn, "cannot get start threshold: (%s)\n", snd_strerror (err));
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if ((err = snd_pcm_sw_params_get_stop_threshold( swparams, &val)) < 0) Debug(DebugWarn, "cannot get stop threshold: (%s)\n", snd_strerror (err));
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if ((err = snd_pcm_sw_params_get_boundary( swparams, &val)) < 0) Debug(DebugWarn, "cannot get boundary: (%s)\n", snd_strerror (err));
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if ((err = snd_pcm_sw_params_set_silence_threshold(m_handle_out, swparams, 0)) < 0) Debug(DebugWarn, "cannot set silence threshold: (%s)\n", snd_strerror (err));
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if ((err = snd_pcm_sw_params_set_silence_size(m_handle_out, swparams, 0)) < 0) Debug(DebugWarn, "cannot set silence size: (%s)\n", snd_strerror (err));
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if ((err = snd_pcm_sw_params(m_handle_out, swparams)) < 0) Debug(DebugWarn, "cannot set sw param: (%s)\n", snd_strerror (err));
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Debug(DebugNote, "Alsa(%s/%s) %u/%u %u/%u %u/%u\n", m_dev_in.c_str(),m_dev_out.c_str(),rate_in,rate_out,(unsigned int)period_size_in,(unsigned int)period_size_out,(unsigned int)buffer_size_in,(unsigned int)buffer_size_out);
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m_closed = false;
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m_lastTime = Time::now() + MIN_SWITCH_TIME;
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return true;
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}
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AlsaDevice::~AlsaDevice()
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{
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Debug(DebugNote,"AlsaDevice::~AlsaDevice [%p]",this);
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m_closed = true;
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if (m_handle_in) {
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snd_pcm_drop (m_handle_in);
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snd_pcm_close (m_handle_in);
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m_handle_in = 0;
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}
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if (m_handle_out) {
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snd_pcm_drop (m_handle_out);
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snd_pcm_close (m_handle_out);
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m_handle_out = 0;
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}
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if (s_dev == this)
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s_dev = 0;
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}
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int AlsaDevice::read(void *buffer, int frames)
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{
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if (closed() || !m_handle_in) return 0;
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int rc = ::snd_pcm_readi(m_handle_in, buffer, frames);
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if (rc <= 0) {
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int err = rc;
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if (err == -EPIPE) { /* under-run */
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Debug(DebugWarn, "ALSA read underrun: %s\n", snd_strerror(err));
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err = snd_pcm_prepare(m_handle_in);
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if (err < 0)
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Debug(DebugWarn, "ALSA read can't recover from underrun, prepare failed: %s\n", snd_strerror(err));
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return 0;
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} else if (err == -ESTRPIPE) {
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while ((err = snd_pcm_resume(m_handle_in)) == -EAGAIN)
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sleep(1); /* wait until the suspend flag is released */
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if (err < 0) {
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err = snd_pcm_prepare(m_handle_in);
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if (err < 0)
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Debug(DebugWarn, "ALSA read can't recover from suspend, prepare failed: %s\n", snd_strerror(err));
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}
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return 0;
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}
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return err;
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}
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return rc;
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}
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int AlsaDevice::write(void *buffer, int frames)
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{
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if (closed() || !m_handle_out) return 0;
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int rc = snd_pcm_writei(m_handle_out, buffer, frames);
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if (rc == -EPIPE) {
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Debug(DebugWarn, "ALSA write underrun occurred\n");
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snd_pcm_prepare(m_handle_out);
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Debug(DebugWarn, "ALSA write underrun fix frame 1\n");
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rc = snd_pcm_writei(m_handle_out, buffer, frames);
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if (rc == -EPIPE) snd_pcm_prepare(m_handle_out);
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Debug(DebugWarn, "ALSA write underrun fix frame 2\n"); //to catch-up missed time
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rc = snd_pcm_writei(m_handle_out, buffer, frames);
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if (rc == -EPIPE) snd_pcm_prepare(m_handle_out);
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} else if (rc < 0) {
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Debug(DebugWarn,"ALSA error from writei: %s\n",::snd_strerror(rc));
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} else if (rc != (int)frames) {
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Debug(DebugWarn,"ALSA short write, writei wrote %d frames\n", rc);
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}
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return rc;
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}
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bool AlsaDevice::timePassed(void)
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{
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return Time::now() > m_lastTime;
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}
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void AlsaChan::disconnected(bool final, const char *reason)
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{
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Debugger debug("AlsaChan::disconnected()"," '%s' [%p]",reason,this);
|
|
setTarget();
|
|
}
|
|
|
|
void AlsaChan::answer()
|
|
{
|
|
Message* m = new Message("call.answered");
|
|
m->addParam("module","alsa");
|
|
String tmp("alsa/");
|
|
tmp += m_dev;
|
|
m->addParam("id",tmp);
|
|
if (m_target)
|
|
m->addParam("targetid",m_target);
|
|
Engine::enqueue(m);
|
|
}
|
|
|
|
bool AlsaHandler::received(Message &msg)
|
|
{
|
|
String dest(msg.getValue("callto"));
|
|
if (dest.null())
|
|
return false;
|
|
Regexp r("^alsa/\\(.*\\)$");
|
|
if (!dest.matches(r))
|
|
return false;
|
|
if (s_chan) {
|
|
msg.setParam("error","busy");
|
|
return false;
|
|
}
|
|
AlsaChan *chan = new AlsaChan(dest.matchString(1).c_str());
|
|
if (!chan->init())
|
|
{
|
|
chan->destruct();
|
|
return false;
|
|
}
|
|
CallEndpoint* ch = static_cast<CallEndpoint*>(msg.userData());
|
|
Debug(DebugInfo,"We are routing to device '%s'",dest.matchString(1).c_str());
|
|
if (ch && chan->connect(ch,msg.getValue("reason"))) {
|
|
chan->setTarget(msg.getValue("id"));
|
|
msg.setParam("peerid",dest);
|
|
msg.setParam("targetid",dest);
|
|
chan->answer();
|
|
chan->deref();
|
|
}
|
|
else {
|
|
const char *direct = msg.getValue("direct");
|
|
if (direct)
|
|
{
|
|
Message m("call.execute");
|
|
m.addParam("module","alsa");
|
|
m.addParam("id",dest);
|
|
m.addParam("caller",dest);
|
|
m.addParam("callto",direct);
|
|
m.userData(chan);
|
|
if (Engine::dispatch(m)) {
|
|
chan->setTarget(m.getValue("targetid"));
|
|
msg.addParam("targetid",chan->getTarget());
|
|
chan->deref();
|
|
return true;
|
|
}
|
|
Debug(DebugInfo,"Alsa outgoing call not accepted!");
|
|
chan->destruct();
|
|
return false;
|
|
}
|
|
const char *targ = msg.getValue("target");
|
|
if (!targ) {
|
|
Debug(DebugWarn,"Alsa outgoing call with no target!");
|
|
chan->destruct();
|
|
return false;
|
|
}
|
|
Message m("call.route");
|
|
m.addParam("module","alsa");
|
|
m.addParam("id",dest);
|
|
m.addParam("caller",dest);
|
|
m.addParam("called",targ);
|
|
if (Engine::dispatch(m)) {
|
|
m = "call.execute";
|
|
m.addParam("callto",m.retValue());
|
|
m.retValue() = 0;
|
|
m.userData(chan);
|
|
if (Engine::dispatch(m)) {
|
|
chan->setTarget(m.getValue("targetid"));
|
|
msg.addParam("targetid",chan->getTarget());
|
|
chan->deref();
|
|
return true;
|
|
}
|
|
Debug(DebugInfo,"Alsa outgoing call not accepted!");
|
|
}
|
|
else
|
|
Debug(DebugWarn,"Alsa outgoing call but no route!");
|
|
chan->destruct();
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool StatusHandler::received(Message &msg)
|
|
{
|
|
const char *sel = msg.getValue("module");
|
|
if (sel && ::strcmp(sel,"alsa"))
|
|
return false;
|
|
msg.retValue() << "name=alsa,type=misc;alsachan=" << (s_chan != 0 ) << "\n";
|
|
return false;
|
|
}
|
|
|
|
bool DropHandler::received(Message &msg)
|
|
{
|
|
String id(msg.getValue("id"));
|
|
if (id.null() || id.startsWith("alsa/")) {
|
|
if (s_chan) {
|
|
Debug("AlsaDropper",DebugInfo,"Dropping call");
|
|
s_chan->disconnect();
|
|
}
|
|
return !id.null();
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool MasqHandler::received(Message &msg)
|
|
{
|
|
String id(msg.getValue("id"));
|
|
if (msg.getParam("message") && id.startsWith("alsa/")) {
|
|
msg = msg.getValue("message");
|
|
msg.clearParam("message");
|
|
if (s_chan) {
|
|
msg.addParam("targetid",s_chan->getTarget());
|
|
msg.userData(s_chan);
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool AttachHandler::received(Message &msg)
|
|
{
|
|
if (s_dev)
|
|
return false;
|
|
int more = 2;
|
|
String src(msg.getValue("source"));
|
|
if (src.null())
|
|
more--;
|
|
else {
|
|
if (!src.startSkip("alsa/",false))
|
|
src = "";
|
|
}
|
|
|
|
String cons(msg.getValue("consumer"));
|
|
if (cons.null())
|
|
more--;
|
|
else {
|
|
if (!cons.startSkip("alsa/",false))
|
|
cons = "";
|
|
}
|
|
|
|
if (src.null() && cons.null())
|
|
return false;
|
|
|
|
if (src && cons && (src != cons)) {
|
|
Debug(DebugWarn,"Alsa asked to attach source '%s' and consumer '%s'",src.c_str(),cons.c_str());
|
|
return false;
|
|
}
|
|
|
|
DataEndpoint *dd = static_cast<DataEndpoint*>(msg.userObject("DataEndpoint"));
|
|
if (!dd) {
|
|
CallEndpoint *ch = static_cast<CallEndpoint*>(msg.userObject("CallEndpoint"));
|
|
if (ch)
|
|
dd = ch->setEndpoint();
|
|
}
|
|
if (!dd) {
|
|
Debug(DebugWarn,"Alsa attach request with no control or data channel!");
|
|
return false;
|
|
}
|
|
|
|
AlsaDevice* dev = new AlsaDevice(src ? src : cons,true);
|
|
if (dev->closed()) {
|
|
dev->deref();
|
|
return false;
|
|
}
|
|
|
|
if (src) {
|
|
AlsaSource* s = new AlsaSource(dev);
|
|
if (s->init())
|
|
dd->setSource(s);
|
|
s->deref();
|
|
}
|
|
|
|
if (cons) {
|
|
AlsaConsumer* c = new AlsaConsumer(dev);
|
|
if (c->init())
|
|
dd->setConsumer(c);
|
|
c->deref();
|
|
}
|
|
|
|
dev->deref();
|
|
|
|
// Stop dispatching if we handled all requested
|
|
return !more;
|
|
}
|
|
|
|
AlsaPlugin::AlsaPlugin()
|
|
: m_handler(0)
|
|
{
|
|
Output("Loaded module AlsaChan");
|
|
}
|
|
|
|
void AlsaPlugin::initialize()
|
|
{
|
|
Output("Initializing module AlsaChan");
|
|
if (!m_handler) {
|
|
m_handler = new AlsaHandler("call.execute");
|
|
Engine::install(new DropHandler("call.drop"));
|
|
Engine::install(new MasqHandler("chan.masquerade",10));
|
|
Engine::install(m_handler);
|
|
Engine::install(new StatusHandler);
|
|
Engine::install(new AttachHandler);
|
|
}
|
|
}
|
|
|
|
bool AlsaPlugin::isBusy() const
|
|
{
|
|
return (s_dev != 0);
|
|
}
|
|
|
|
INIT_PLUGIN(AlsaPlugin);
|
|
|
|
}; // anonymous namespace
|
|
|
|
/* vi: set ts=8 sw=4 sts=4 noet: */
|