Jack2
1.9.8
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00001 /* 00002 Copyright (C) 2001 Paul Davis 00003 Copyright (C) 2004-2008 Grame 00004 00005 This program is free software; you can redistribute it and/or modify 00006 it under the terms of the GNU General Public License as published by 00007 the Free Software Foundation; either version 2 of the License, or 00008 (at your option) any later version. 00009 00010 This program is distributed in the hope that it will be useful, 00011 but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00013 GNU General Public License for more details. 00014 00015 You should have received a copy of the GNU General Public License 00016 along with this program; if not, write to the Free Software 00017 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 00018 00019 */ 00020 00021 #include "JackDummyDriver.h" 00022 #include "JackDriverLoader.h" 00023 #include "JackThreadedDriver.h" 00024 #include "JackCompilerDeps.h" 00025 #include <iostream> 00026 #include <unistd.h> 00027 #include <math.h> 00028 00029 00030 #ifdef __cplusplus 00031 extern "C" 00032 { 00033 #endif 00034 00035 SERVER_EXPORT jack_driver_desc_t * driver_get_descriptor () { 00036 jack_driver_desc_t * desc; 00037 jack_driver_desc_filler_t filler; 00038 jack_driver_param_value_t value; 00039 00040 desc = jack_driver_descriptor_construct("dummy", JackDriverMaster, "Timer based backend", &filler); 00041 00042 value.ui = 2U; 00043 jack_driver_descriptor_add_parameter(desc, &filler, "capture", 'C', JackDriverParamUInt, &value, NULL, "Number of capture ports", NULL); 00044 jack_driver_descriptor_add_parameter(desc, &filler, "playback", 'P', JackDriverParamUInt, &value, NULL, "Number of playback ports", NULL); 00045 00046 value.ui = 48000U; 00047 jack_driver_descriptor_add_parameter(desc, &filler, "rate", 'r', JackDriverParamUInt, &value, NULL, "Sample rate", NULL); 00048 00049 value.i = 0; 00050 jack_driver_descriptor_add_parameter(desc, &filler, "monitor", 'm', JackDriverParamBool, &value, NULL, "Provide monitor ports for the output", NULL); 00051 00052 value.ui = 1024U; 00053 jack_driver_descriptor_add_parameter(desc, &filler, "period", 'p', JackDriverParamUInt, &value, NULL, "Frames per period", NULL); 00054 00055 value.ui = 21333U; 00056 jack_driver_descriptor_add_parameter(desc, &filler, "wait", 'w', JackDriverParamUInt, &value, NULL, "Number of usecs to wait between engine processes", NULL); 00057 00058 return desc; 00059 } 00060 00061 SERVER_EXPORT Jack::JackDriverClientInterface* driver_initialize(Jack::JackLockedEngine* engine, Jack::JackSynchro* table, const JSList* params) { 00062 jack_nframes_t sample_rate = 48000; 00063 jack_nframes_t buffer_size = 1024; 00064 unsigned int capture_ports = 2; 00065 unsigned int playback_ports = 2; 00066 int wait_time = 0; 00067 const JSList * node; 00068 const jack_driver_param_t * param; 00069 bool monitor = false; 00070 00071 for (node = params; node; node = jack_slist_next (node)) { 00072 param = (const jack_driver_param_t *) node->data; 00073 00074 switch (param->character) { 00075 00076 case 'C': 00077 capture_ports = param->value.ui; 00078 break; 00079 00080 case 'P': 00081 playback_ports = param->value.ui; 00082 break; 00083 00084 case 'r': 00085 sample_rate = param->value.ui; 00086 break; 00087 00088 case 'p': 00089 buffer_size = param->value.ui; 00090 break; 00091 00092 case 'w': 00093 wait_time = param->value.ui; 00094 break; 00095 00096 case 'm': 00097 monitor = param->value.i; 00098 break; 00099 } 00100 } 00101 00102 if (wait_time > 0) { 00103 buffer_size = lroundf((wait_time * sample_rate) / 1000000.0f); 00104 if (buffer_size > BUFFER_SIZE_MAX) { 00105 buffer_size = BUFFER_SIZE_MAX; 00106 jack_error("Buffer size set to %d", BUFFER_SIZE_MAX); 00107 } 00108 } 00109 00110 Jack::JackDriverClientInterface* driver = new Jack::JackThreadedDriver(new Jack::JackDummyDriver("system", "dummy_pcm", engine, table)); 00111 if (driver->Open(buffer_size, sample_rate, 1, 1, capture_ports, playback_ports, monitor, "dummy", "dummy", 0, 0) == 0) { 00112 return driver; 00113 } else { 00114 delete driver; 00115 return NULL; 00116 } 00117 } 00118 00119 #ifdef __cplusplus 00120 } 00121 #endif