104 lines
2.7 KiB
C++
104 lines
2.7 KiB
C++
/*
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Copyright (C) 2001 Paul Davis
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Copyright (C) 2004-2008 Grame
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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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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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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 "JackTimedDriver.h"
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#include "JackEngineControl.h"
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#include "JackTime.h"
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#include "JackCompilerDeps.h"
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#include <iostream>
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#include <unistd.h>
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#include <math.h>
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namespace Jack
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{
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int JackTimedDriver::FirstCycle(jack_time_t cur_time_usec)
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{
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fAnchorTimeUsec = cur_time_usec;
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return int((double(fEngineControl->fBufferSize) * 1000000) / double(fEngineControl->fSampleRate));
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}
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int JackTimedDriver::CurrentCycle(jack_time_t cur_time_usec)
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{
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return int(((double(fCycleCount) * double(fEngineControl->fBufferSize) * 1000000.) / double(fEngineControl->fSampleRate)) - (cur_time_usec - fAnchorTimeUsec));
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}
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int JackTimedDriver::Start()
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{
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fCycleCount = 0;
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return JackAudioDriver::Start();
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}
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void JackTimedDriver::ProcessWait()
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{
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jack_time_t cur_time_usec = GetMicroSeconds();
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int wait_time_usec;
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if (fCycleCount++ == 0) {
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wait_time_usec = FirstCycle(cur_time_usec);
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} else {
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wait_time_usec = CurrentCycle(cur_time_usec);
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}
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if (wait_time_usec < 0) {
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NotifyXRun(cur_time_usec, float(cur_time_usec - fBeginDateUst));
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fCycleCount = 0;
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wait_time_usec = 0;
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jack_error("JackTimedDriver::Process XRun = %ld usec", (cur_time_usec - fBeginDateUst));
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}
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//jack_log("JackTimedDriver::Process wait_time = %d", wait_time_usec);
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JackSleep(wait_time_usec);
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}
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int JackWaiterDriver::ProcessNull()
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{
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JackDriver::CycleTakeBeginTime();
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// Graph processing without Read/Write
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if (fEngineControl->fSyncMode) {
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ProcessGraphSync();
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} else {
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ProcessGraphAsync();
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}
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// Keep end cycle time
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JackDriver::CycleTakeEndTime();
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ProcessWait();
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return 0;
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}
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void JackRestarterDriver::SetRestartDriver(JackDriver* driver)
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{
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fRestartDriver = driver;
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}
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int JackRestarterDriver::RestartWait()
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{
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if (!fRestartDriver) {
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jack_error("JackRestartedDriver::RestartWait driver not set");
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return -1;
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}
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return fRestartDriver->Start();
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}
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} // end of namespace
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