123 lines
4.2 KiB
C++
123 lines
4.2 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 "JackDummyDriver.h"
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#include "JackDriverLoader.h"
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#include "JackThreadedDriver.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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#ifdef __cplusplus
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extern "C"
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{
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#endif
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SERVER_EXPORT jack_driver_desc_t * driver_get_descriptor () {
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jack_driver_desc_t * desc;
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jack_driver_desc_filler_t filler;
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jack_driver_param_value_t value;
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desc = jack_driver_descriptor_construct("dummy", JackDriverMaster, "Timer based backend", &filler);
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value.ui = 2U;
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jack_driver_descriptor_add_parameter(desc, &filler, "capture", 'C', JackDriverParamUInt, &value, NULL, "Number of capture ports", NULL);
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jack_driver_descriptor_add_parameter(desc, &filler, "playback", 'P', JackDriverParamUInt, &value, NULL, "Number of playback ports", NULL);
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value.ui = 48000U;
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jack_driver_descriptor_add_parameter(desc, &filler, "rate", 'r', JackDriverParamUInt, &value, NULL, "Sample rate", NULL);
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value.i = 0;
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jack_driver_descriptor_add_parameter(desc, &filler, "monitor", 'm', JackDriverParamBool, &value, NULL, "Provide monitor ports for the output", NULL);
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value.ui = 1024U;
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jack_driver_descriptor_add_parameter(desc, &filler, "period", 'p', JackDriverParamUInt, &value, NULL, "Frames per period", NULL);
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value.ui = 21333U;
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jack_driver_descriptor_add_parameter(desc, &filler, "wait", 'w', JackDriverParamUInt, &value, NULL, "Number of usecs to wait between engine processes", NULL);
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return desc;
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}
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SERVER_EXPORT Jack::JackDriverClientInterface* driver_initialize(Jack::JackLockedEngine* engine, Jack::JackSynchro* table, const JSList* params) {
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jack_nframes_t sample_rate = 48000;
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jack_nframes_t buffer_size = 1024;
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unsigned int capture_ports = 2;
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unsigned int playback_ports = 2;
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int wait_time = 0;
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const JSList * node;
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const jack_driver_param_t * param;
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bool monitor = false;
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for (node = params; node; node = jack_slist_next (node)) {
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param = (const jack_driver_param_t *) node->data;
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switch (param->character) {
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case 'C':
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capture_ports = param->value.ui;
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break;
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case 'P':
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playback_ports = param->value.ui;
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break;
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case 'r':
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sample_rate = param->value.ui;
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break;
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case 'p':
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buffer_size = param->value.ui;
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break;
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case 'w':
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wait_time = param->value.ui;
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break;
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case 'm':
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monitor = param->value.i;
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break;
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}
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}
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if (wait_time > 0) {
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buffer_size = lroundf((float(wait_time) * float(sample_rate)) / 1000000.0f);
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}
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if (buffer_size > BUFFER_SIZE_MAX) {
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buffer_size = BUFFER_SIZE_MAX;
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jack_error("Buffer size set to %d", BUFFER_SIZE_MAX);
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}
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Jack::JackDriverClientInterface* driver = new Jack::JackThreadedDriver(new Jack::JackDummyDriver("system", "dummy_pcm", engine, table));
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if (driver->Open(buffer_size, sample_rate, 1, 1, capture_ports, playback_ports, monitor, "dummy", "dummy", 0, 0) == 0) {
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return driver;
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} else {
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delete driver;
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return NULL;
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}
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}
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#ifdef __cplusplus
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}
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#endif
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