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/*
Copyright (C) 2001-2002 Stefan Westerfeld
stefan@space.twc.de
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "audiosync_impl.h"
#include "midisyncgroup_impl.h"
#include "audiotimer.h"
#include "audiosubsys.h"
#include "timestampmath.h"
#undef AUDIO_DEBUG_DRIFT
using namespace std;
using namespace Arts;
namespace Arts {
static list<AudioSync_impl *> audioSyncImplList;
}
void AudioSync_impl::AudioSyncEvent::execute()
{
list<SynthModule>::iterator i;
for(i = startModules.begin(); i != startModules.end(); i++)
i->start();
for(i = stopModules.begin(); i != stopModules.end(); i++)
i->stop();
}
AudioSync_impl::AudioSync_impl()
: newEvent(new AudioSyncEvent), syncGroup(0)
{
syncOffset = TimeStamp(0,0);
timer = AudioTimer::subscribe();
timer->addCallback(this);
audioSyncImplList.push_back(this);
}
AudioSync_impl::~AudioSync_impl()
{
delete newEvent;
while(!events.empty())
{
delete events.front();
events.pop_front();
}
if(syncGroup)
{
syncGroup->audioSyncDied(this);
syncGroup = 0;
}
audioSyncImplList.remove(this);
timer->removeCallback(this);
timer->unsubscribe();
}
TimeStamp AudioSync_impl::time()
{
if(syncGroup)
return syncGroup->time();
else
return audioTime();
}
TimeStamp AudioSync_impl::playTime()
{
if(syncGroup)
return syncGroup->playTime();
else
return audioPlayTime();
}
TimeStamp AudioSync_impl::audioTime()
{
return timer->time();
}
TimeStamp AudioSync_impl::audioPlayTime()
{
double delay = AudioSubSystem::the()->outputDelay();
TimeStamp time = audioTime();
timeStampDec(time,timeStampFromDouble(delay));
return time;
}
TimeStamp AudioSync_impl::clientTime()
{
TimeStamp time = audioTime();
timeStampDec(time, syncOffset);
return time;
}
void AudioSync_impl::queueStart(SynthModule synthModule)
{
newEvent->startModules.push_back(synthModule);
}
void AudioSync_impl::queueStop(SynthModule synthModule)
{
newEvent->stopModules.push_back(synthModule);
}
void AudioSync_impl::execute()
{
newEvent->execute();
newEvent->startModules.clear();
newEvent->stopModules.clear();
}
void AudioSync_impl::executeAt(const TimeStamp& timeStamp)
{
newEvent->time = timeStamp;
if(syncGroup)
timeStampInc(newEvent->time, syncOffset);
events.push_back(newEvent);
newEvent = new AudioSyncEvent;
}
void AudioSync_impl::updateTime()
{
TimeStamp now = audioTime();
list<AudioSyncEvent*>::iterator i;
i = events.begin();
while(i != events.end())
{
AudioSyncEvent *event = *i;
TimeStamp& eventTime = event->time;
if( now.sec > eventTime.sec
|| ((now.sec == eventTime.sec) && (now.usec > eventTime.usec)))
{
event->execute();
delete event;
i = events.erase(i);
}
else
{
i++;
}
}
}
void AudioSync_impl::setSyncGroup(MidiSyncGroup_impl *newSyncGroup)
{
syncGroup = newSyncGroup;
}
void AudioSync_impl::synchronizeTo(const TimeStamp& time)
{
#ifdef AUDIO_DEBUG_DRIFT
TimeStamp drift = syncOffset; // debug drift
#endif
syncOffset = audioPlayTime();
timeStampDec(syncOffset, time);
#ifdef AUDIO_DEBUG_DRIFT
timeStampDec(drift, syncOffset); // debug drift
printf("SYNC DRIFT %30s %30s: %f\n",
"AudioSync", "AudioSync", timeStampToDouble(drift));
#endif
}
AudioSync_impl *AudioSync_impl::find(AudioSync audioSync)
{
list<AudioSync_impl *>::iterator i;
for(i = audioSyncImplList.begin(); i != audioSyncImplList.end(); i++)
{
if((*i)->_isEqual(audioSync._base()))
return (*i);
}
return 0;
}
namespace Arts { REGISTER_IMPLEMENTATION(AudioSync_impl); }
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