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00021 #include "JackDummyDriver.h"
00022 #include "JackEngineControl.h"
00023 #include "JackGraphManager.h"
00024 #include "JackDriverLoader.h"
00025 #include "JackThreadedDriver.h"
00026 #include "JackCompilerDeps.h"
00027 #include <iostream>
00028 #include <unistd.h>
00029
00030 namespace Jack
00031 {
00032
00033 int JackDummyDriver::Open(jack_nframes_t buffer_size,
00034 jack_nframes_t samplerate,
00035 bool capturing,
00036 bool playing,
00037 int inchannels,
00038 int outchannels,
00039 bool monitor,
00040 const char* capture_driver_name,
00041 const char* playback_driver_name,
00042 jack_nframes_t capture_latency,
00043 jack_nframes_t playback_latency)
00044 {
00045 if (JackAudioDriver::Open(buffer_size,
00046 samplerate,
00047 capturing,
00048 playing,
00049 inchannels,
00050 outchannels,
00051 monitor,
00052 capture_driver_name,
00053 playback_driver_name,
00054 capture_latency,
00055 playback_latency) == 0) {
00056 fEngineControl->fPeriod = 0;
00057 fEngineControl->fComputation = 500 * 1000;
00058 fEngineControl->fConstraint = 500 * 1000;
00059 return 0;
00060 } else {
00061 return -1;
00062 }
00063 }
00064
00065 int JackDummyDriver::Process()
00066 {
00067 JackDriver::CycleTakeBeginTime();
00068 JackAudioDriver::Process();
00069 JackSleep(std::max(0L, long(fWaitTime - (GetMicroSeconds() - fBeginDateUst))));
00070 return 0;
00071 }
00072
00073 int JackDummyDriver::SetBufferSize(jack_nframes_t buffer_size)
00074 {
00075 JackAudioDriver::SetBufferSize(buffer_size);
00076 fWaitTime = (unsigned long)((((float)buffer_size) / ((float)fEngineControl->fSampleRate)) * 1000000.0f);
00077 return 0;
00078 }
00079
00080 }
00081
00082 #ifdef __cplusplus
00083 extern "C"
00084 {
00085 #endif
00086
00087 SERVER_EXPORT jack_driver_desc_t * driver_get_descriptor () {
00088 jack_driver_desc_t * desc;
00089 unsigned int i;
00090
00091 desc = (jack_driver_desc_t*)calloc (1, sizeof (jack_driver_desc_t));
00092 strcpy(desc->name, "dummy");
00093 strcpy(desc->desc, "Timer based backend");
00094
00095 desc->nparams = 6;
00096 desc->params = (jack_driver_param_desc_t*)calloc (desc->nparams, sizeof (jack_driver_param_desc_t));
00097
00098 i = 0;
00099 strcpy(desc->params[i].name, "capture");
00100 desc->params[i].character = 'C';
00101 desc->params[i].type = JackDriverParamUInt;
00102 desc->params[i].value.ui = 2U;
00103 strcpy(desc->params[i].short_desc, "Number of capture ports");
00104 strcpy(desc->params[i].long_desc, desc->params[i].short_desc);
00105
00106 i++;
00107 strcpy(desc->params[i].name, "playback");
00108 desc->params[i].character = 'P';
00109 desc->params[i].type = JackDriverParamUInt;
00110 desc->params[1].value.ui = 2U;
00111 strcpy(desc->params[i].short_desc, "Number of playback ports");
00112 strcpy(desc->params[i].long_desc, desc->params[i].short_desc);
00113
00114 i++;
00115 strcpy(desc->params[i].name, "rate");
00116 desc->params[i].character = 'r';
00117 desc->params[i].type = JackDriverParamUInt;
00118 desc->params[i].value.ui = 48000U;
00119 strcpy(desc->params[i].short_desc, "Sample rate");
00120 strcpy(desc->params[i].long_desc, desc->params[i].short_desc);
00121
00122 i++;
00123 strcpy(desc->params[i].name, "monitor");
00124 desc->params[i].character = 'm';
00125 desc->params[i].type = JackDriverParamBool;
00126 desc->params[i].value.i = 0;
00127 strcpy(desc->params[i].short_desc, "Provide monitor ports for the output");
00128 strcpy(desc->params[i].long_desc, desc->params[i].short_desc);
00129
00130 i++;
00131 strcpy(desc->params[i].name, "period");
00132 desc->params[i].character = 'p';
00133 desc->params[i].type = JackDriverParamUInt;
00134 desc->params[i].value.ui = 1024U;
00135 strcpy(desc->params[i].short_desc, "Frames per period");
00136 strcpy(desc->params[i].long_desc, desc->params[i].short_desc);
00137
00138 i++;
00139 strcpy(desc->params[i].name, "wait");
00140 desc->params[i].character = 'w';
00141 desc->params[i].type = JackDriverParamUInt;
00142 desc->params[i].value.ui = 21333U;
00143 strcpy(desc->params[i].short_desc,
00144 "Number of usecs to wait between engine processes");
00145 strcpy(desc->params[i].long_desc, desc->params[i].short_desc);
00146
00147 return desc;
00148 }
00149
00150 SERVER_EXPORT Jack::JackDriverClientInterface* driver_initialize(Jack::JackLockedEngine* engine, Jack::JackSynchro* table, const JSList* params) {
00151 jack_nframes_t sample_rate = 48000;
00152 jack_nframes_t period_size = 1024;
00153 unsigned int capture_ports = 2;
00154 unsigned int playback_ports = 2;
00155 unsigned long wait_time = 0;
00156 const JSList * node;
00157 const jack_driver_param_t * param;
00158 bool monitor = false;
00159
00160 for (node = params; node; node = jack_slist_next (node)) {
00161 param = (const jack_driver_param_t *) node->data;
00162
00163 switch (param->character) {
00164
00165 case 'C':
00166 capture_ports = param->value.ui;
00167 break;
00168
00169 case 'P':
00170 playback_ports = param->value.ui;
00171 break;
00172
00173 case 'r':
00174 sample_rate = param->value.ui;
00175 break;
00176
00177 case 'p':
00178 period_size = param->value.ui;
00179 break;
00180
00181 case 'w':
00182 wait_time = param->value.ui;
00183 break;
00184
00185 case 'm':
00186 monitor = param->value.i;
00187 break;
00188 }
00189 }
00190
00191 if (wait_time == 0)
00192 wait_time = (unsigned long)((((float)period_size) / ((float)sample_rate)) * 1000000.0f);
00193
00194 Jack::JackDriverClientInterface* driver = new Jack::JackThreadedDriver(new Jack::JackDummyDriver("system", "dummy_pcm", engine, table, wait_time));
00195 if (driver->Open(period_size, sample_rate, 1, 1, capture_ports, playback_ports, monitor, "dummy", "dummy", 0, 0) == 0) {
00196 return driver;
00197 } else {
00198 delete driver;
00199 return NULL;
00200 }
00201 }
00202
00203 #ifdef __cplusplus
00204 }
00205 #endif