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/*
Copyright (C) 2001 Paul Davis
Copyright (C) 2004-2008 Grame
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "JackSystemDeps.h"
#include "JackLoopbackDriver.h"
#include "JackDriverLoader.h"
#include "JackEngineControl.h"
#include "JackGraphManager.h"
#include "JackError.h"
#include <iostream>
#include <assert.h>
namespace Jack
{
int JackLoopbackDriver::Process()
{
// Loopback copy
for (int i = 0; i < fCaptureChannels; i++) {
memcpy(GetInputBuffer(i), GetOutputBuffer(i), sizeof(float) * fEngineControl->fBufferSize);
}
fGraphManager->ResumeRefNum(&fClientControl, fSynchroTable); // Signal all clients
if (fEngineControl->fSyncMode) {
if (fGraphManager->SuspendRefNum(&fClientControl, fSynchroTable, DRIVER_TIMEOUT_FACTOR * fEngineControl->fTimeOutUsecs) < 0) {
jack_error("JackLoopbackDriver::ProcessSync SuspendRefNum error");
return -1;
}
}
return 0;
}
} // end of namespace
#ifdef __cplusplus
extern "C"
{
#endif
SERVER_EXPORT jack_driver_desc_t * driver_get_descriptor()
{
jack_driver_desc_t * desc;
unsigned int i;
desc = (jack_driver_desc_t*)calloc (1, sizeof (jack_driver_desc_t));
strcpy(desc->name, "loopback"); // size MUST be less then JACK_DRIVER_NAME_MAX + 1
strcpy(desc->desc, "Loopback backend"); // size MUST be less then JACK_DRIVER_PARAM_DESC + 1
desc->nparams = 1;
desc->params = (jack_driver_param_desc_t*)calloc (desc->nparams, sizeof (jack_driver_param_desc_t));
i = 0;
strcpy(desc->params[i].name, "channels");
desc->params[i].character = 'c';
desc->params[i].type = JackDriverParamInt;
desc->params[i].value.ui = 0;
strcpy(desc->params[i].short_desc, "Maximum number of loopback ports");
strcpy(desc->params[i].long_desc, desc->params[i].short_desc);
return desc;
}
SERVER_EXPORT Jack::JackDriverClientInterface* driver_initialize(Jack::JackLockedEngine* engine, Jack::JackSynchro* table, const JSList* params)
{
const JSList * node;
const jack_driver_param_t * param;
int channels = 2;
for (node = params; node; node = jack_slist_next (node)) {
param = (const jack_driver_param_t *) node->data;
switch (param->character) {
case 'c':
channels = param->value.ui;
break;
}
}
Jack::JackDriverClientInterface* driver = new Jack::JackLoopbackDriver(engine, table);
if (driver->Open(1, 1, channels, channels, false, "loopback", "loopback", 0, 0) == 0) {
return driver;
} else {
delete driver;
return NULL;
}
}
#ifdef __cplusplus
}
#endif
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