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von raredesign | Dez 3, 2019 | Allgemein | 0 Kommentare
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| Current Path : /proc/self/root/usr/include/CLAM/ |
| Current File : //proc/self/root/usr/include/CLAM/NetworkPlayer.hxx |
/*
* Copyright (c) 2001-2007 MUSIC TECHNOLOGY GROUP (MTG)
* UNIVERSITAT POMPEU FABRA
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef NetworkPlayer_hxx
#define NetworkPlayer_hxx
#include "Network.hxx"
#include "AudioSource.hxx"
#include "AudioSink.hxx"
namespace CLAM
{
/**
* A NetworkPlayer is an object that controls the playback of a
* Network providing a high level transport like interface.
* This class is an abstract class.
* Subclasses contextualizes the network inside a given execution
* context dealing with threading, callback calling and device mapping
* on concrete architectures such as Alsa, PortAudio, Jack, VST, Ladspa...
*/
class NetworkPlayer
{
protected:
enum Status { Playing=0, Stopped=1, Paused=2 };
public:
NetworkPlayer()
: _network(NULL)
, _status(Stopped)
{
}
virtual ~NetworkPlayer()
{
}
/// Should return true when the backend is able to run the network
virtual bool IsWorking() = 0;
/// Whenever the backend is not working, this method returns the reason
virtual std::string NonWorkingReason() = 0;
/// Redefine to add any initialization after being attached to a network
/// TODO: Consider removing it as just Jack backend uses it but it is redundant
virtual void Init() {}
/// Redefine to make the backend ready to process and start the network.
/// If IsPlaying() should do nothing.
/// If it IsPaused() you should consider just call BePlaying()
/// without starting the processings.
virtual void Start()=0; // { if (not IsPlaying()) BePlaying(); }
/// Redefine it to deactivate the backend.
virtual void Stop()=0; // { if (not IsStopped()) BeStopped(); }
virtual void Pause() { if (IsPlaying()) BePaused(); }
void SetNetworkBackLink( Network& net )
{
_network=&net;
}
void BePaused() { _status=Paused; }
void BeStopped() { _status=Stopped; }
void BePlaying() { _status=Playing; }
bool IsPaused() const { return _status==Paused; }
bool IsStopped() const { return _status==Stopped; }
bool IsPlaying() const { return _status==Playing; }
virtual bool IsRealTime() const = 0;
virtual unsigned BackendBufferSize()
{
return 512;
}
virtual unsigned BackendSampleRate()
{
return 44100;
}
std::string SourcesAndSinksToString();
protected:
Network& GetNetwork()
{
CLAM_ASSERT( (_network!=NULL), "NetworkPlayer::GetNetwork() : NetworkPlayer does not have any Network");
return *_network;
}
protected:
unsigned GetNSinks() const { return _exportedSinks.size(); }
unsigned GetNSources() const { return _exportedSources.size(); }
void CacheSourcesAndSinks()
{
_exportedSources.clear();
Network::Processings sources = GetSources();
for (Network::Processings::const_iterator it = sources.begin(); it != sources.end(); ++it)
{
Processing * processing = *it;
std::string processingName = _network->GetNetworkId(processing);
unsigned nPorts = processing->GetNOutPorts();
for (unsigned i=0; i<nPorts; i++)
{
std::ostringstream portName;
portName << processingName;
if (nPorts > 1)
portName << "_" << processing->GetOutPort(i).GetName();
_exportedSources.push_back(ExportedPort(processing,i, portName.str()));
}
}
_exportedSinks.clear();
Network::Processings sinks = GetSinks();
for (Network::Processings::const_iterator it = sinks.begin(); it != sinks.end(); ++it)
{
Processing * processing = *it;
std::string processingName = _network->GetNetworkId(processing);
unsigned nPorts = processing->GetNInPorts();
for (unsigned i=0; i<nPorts; i++)
{
std::ostringstream portName;
portName << processingName;
if (nPorts > 1)
portName << "_" << processing->GetInPort(i).GetName();
_exportedSinks.push_back(ExportedPort(processing,i, portName.str()));
}
}
}
const std::string & SourceName(unsigned source) const
{
return _exportedSources[source].name;
}
const std::string & SinkName(unsigned sink) const
{
return _exportedSinks[sink].name;
}
void SetSourceBuffer(unsigned source, const float * data, unsigned nframes);
void SetSinkBuffer(unsigned sink, float * data, unsigned nframes);
void SetSinkFrameSize(unsigned sink, unsigned frameSize);
void SetSourceFrameSize(unsigned source, unsigned frameSize);
private:
Network::Processings GetSources()
{
return GetNetwork().getOrderedProcessingsByAttribute("port_source_type");
}
Network::Processings GetSinks()
{
return GetNetwork().getOrderedProcessingsByAttribute("port_sink_type");
}
template <typename ProcessingType>
void SetFrameAndHopSizeIf(Processing * proc, unsigned bufferSize, unsigned port)
{
if(typeid(*proc)!=typeid(ProcessingType)) return;
((ProcessingType*)proc)->SetFrameAndHopSize(bufferSize, port);
}
template <typename ProcessingType>
void SetExternalBuffer(Processing * proc, const float * data, unsigned nframes, unsigned port)
{
if(typeid(*proc)!=typeid(ProcessingType)) return;
((ProcessingType*)proc)->SetExternalBuffer(data, nframes, port);
}
template <typename ProcessingType>
void SetExternalBuffer(Processing * proc, float * data, unsigned nframes, unsigned port)
{
if(typeid(*proc)!=typeid(ProcessingType)) return;
((ProcessingType*)proc)->SetExternalBuffer(data, nframes, port);
}
private:
struct ExportedPort
{
ExportedPort(Processing * aProcesing, unsigned aPort, const std::string & aName)
: processing(aProcesing)
, port(aPort)
, name(aName)
{
}
Processing * processing;
unsigned port;
std::string name;
};
typedef std::vector <ExportedPort> ExportedPorts;
ExportedPorts _exportedSources;
ExportedPorts _exportedSinks;
Network *_network;
volatile Status _status;
};
} //namespace CLAM
#endif // NetworkPlayer_hxx
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