2 Copyright (C) 2001 Paul Davis
3 Copyright (C) 2004-2008 Grame
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #include "JackDummyDriver.h"
22 #include "JackDriverLoader.h"
23 #include "JackThreadedDriver.h"
24 #include "JackCompilerDeps.h"
35 SERVER_EXPORT jack_driver_desc_t
* driver_get_descriptor () {
36 jack_driver_desc_t
* desc
;
37 jack_driver_desc_filler_t filler
;
38 jack_driver_param_value_t value
;
40 desc
= jack_driver_descriptor_construct("dummy", JackDriverMaster
, "Timer based backend", &filler
);
43 jack_driver_descriptor_add_parameter(desc
, &filler
, "capture", 'C', JackDriverParamUInt
, &value
, NULL
, "Number of capture ports", NULL
);
44 jack_driver_descriptor_add_parameter(desc
, &filler
, "playback", 'P', JackDriverParamUInt
, &value
, NULL
, "Number of playback ports", NULL
);
47 jack_driver_descriptor_add_parameter(desc
, &filler
, "rate", 'r', JackDriverParamUInt
, &value
, NULL
, "Sample rate", NULL
);
50 jack_driver_descriptor_add_parameter(desc
, &filler
, "monitor", 'm', JackDriverParamBool
, &value
, NULL
, "Provide monitor ports for the output", NULL
);
53 jack_driver_descriptor_add_parameter(desc
, &filler
, "period", 'p', JackDriverParamUInt
, &value
, NULL
, "Frames per period", NULL
);
56 jack_driver_descriptor_add_parameter(desc
, &filler
, "wait", 'w', JackDriverParamUInt
, &value
, NULL
, "Number of usecs to wait between engine processes", NULL
);
61 SERVER_EXPORT
Jack::JackDriverClientInterface
* driver_initialize(Jack::JackLockedEngine
* engine
, Jack::JackSynchro
* table
, const JSList
* params
) {
62 jack_nframes_t sample_rate
= 48000;
63 jack_nframes_t buffer_size
= 1024;
64 unsigned int capture_ports
= 2;
65 unsigned int playback_ports
= 2;
68 const jack_driver_param_t
* param
;
71 for (node
= params
; node
; node
= jack_slist_next (node
)) {
72 param
= (const jack_driver_param_t
*) node
->data
;
74 switch (param
->character
) {
77 capture_ports
= param
->value
.ui
;
81 playback_ports
= param
->value
.ui
;
85 sample_rate
= param
->value
.ui
;
89 buffer_size
= param
->value
.ui
;
93 wait_time
= param
->value
.ui
;
97 monitor
= param
->value
.i
;
103 buffer_size
= lroundf((float(wait_time
) * float(sample_rate
)) / 1000000.0f
);
106 if (buffer_size
> BUFFER_SIZE_MAX
) {
107 buffer_size
= BUFFER_SIZE_MAX
;
108 jack_error("Buffer size set to %d", BUFFER_SIZE_MAX
);
111 Jack::JackDriverClientInterface
* driver
= new Jack::JackThreadedDriver(new Jack::JackDummyDriver("system", "dummy_pcm", engine
, table
));
112 if (driver
->Open(buffer_size
, sample_rate
, 1, 1, capture_ports
, playback_ports
, monitor
, "dummy", "dummy", 0, 0) == 0) {