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-rw-r--r--arts/midi/audiotimer.cpp98
1 files changed, 98 insertions, 0 deletions
diff --git a/arts/midi/audiotimer.cpp b/arts/midi/audiotimer.cpp
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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 "artsmidi.h"
+#include "artsflow.h"
+#include "stdsynthmodule.h"
+#include "debug.h"
+#include "miditimercommon.h"
+#include "audiotimer.h"
+#include "flowsystem.h"
+
+using namespace std;
+using namespace Arts;
+
+static AudioTimer *AudioTimer_the = 0;
+
+AudioTimer::AudioTimer()
+{
+ AudioTimer_the = this;
+ samples = seconds = 0;
+}
+
+AudioTimer::~AudioTimer()
+{
+ AudioTimer_the = 0;
+}
+
+TimeStamp AudioTimer::time()
+{
+ return TimeStamp(seconds,
+ (long)((float)samples / samplingRateFloat * 1000000.0));
+}
+
+void AudioTimer::notify(const Notification &)
+{
+ list<AudioTimerCallback *>::iterator i;
+ for(i = callbacks.begin(); i != callbacks.end(); i++)
+ (*i)->updateTime();
+}
+
+void AudioTimer::calculateBlock(unsigned long s)
+{
+ samples += s;
+ while(samples > samplingRate)
+ {
+ samples -= samplingRate;
+ seconds++;
+ }
+ Notification n;
+ n.receiver = this;
+ n.ID = 0;
+ n.data = 0;
+ n.internal = 0;
+ NotificationManager::the()->send(n);
+}
+
+AudioTimer *AudioTimer::subscribe()
+{
+ if(!AudioTimer_the)
+ {
+ new AudioTimer();
+ AudioTimer_the->_node()->start();
+ }
+ else
+ {
+ AudioTimer_the->_copy();
+ }
+ return AudioTimer_the;
+}
+
+void AudioTimer::addCallback(AudioTimerCallback *callback)
+{
+ callbacks.push_back(callback);
+}
+
+void AudioTimer::removeCallback(AudioTimerCallback *callback)
+{
+ callbacks.remove(callback);
+}