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00020 #include "JackEngineTiming.h"
00021 #include "JackClientInterface.h"
00022 #include "JackEngineControl.h"
00023 #include "JackClientControl.h"
00024 #include <math.h>
00025 #include <algorithm>
00026 #include <iostream>
00027
00028 #include <assert.h>
00029
00030 namespace Jack
00031 {
00032
00033 inline jack_time_t MAX(jack_time_t a, jack_time_t b)
00034 {
00035 return (a < b) ? b : a;
00036 }
00037
00038 JackEngineTiming::JackEngineTiming(JackClientInterface** table, JackGraphManager* manager, JackEngineControl* control)
00039 {
00040 fClientTable = table;
00041 fGraphManager = manager;
00042 fEngineControl = control;
00043 fLastTime = 0;
00044 fCurTime = 0;
00045 fProcessTime = 0;
00046 fLastProcessTime = 0;
00047 fSpareUsecs = 0;
00048 fMaxUsecs = 0;
00049 fAudioCycle = 0;
00050 }
00051
00052 void JackEngineTiming::UpdateTiming(jack_time_t callback_usecs)
00053 {
00054 GetTimeMeasure(callback_usecs);
00055 CalcCPULoad();
00056 }
00057
00058 void JackEngineTiming::CalcCPULoad()
00059 {
00060 jack_time_t lastCycleEnd = fLastProcessTime;
00061
00062 for (int i = REAL_REFNUM; i < CLIENT_NUM; i++) {
00063 JackClientInterface* client = fClientTable[i];
00064 JackClientTiming* timing = fGraphManager->GetClientTiming(i);
00065 if (client && client->GetClientControl()->fActive && timing->fStatus == Finished) {
00066 lastCycleEnd = MAX(lastCycleEnd, timing->fFinishedAt);
00067 }
00068 }
00069
00070
00071 fRollingClientUsecs[fRollingClientUsecsIndex++] = lastCycleEnd - fLastTime;
00072
00073 if (fRollingClientUsecsIndex >= JACK_ENGINE_ROLLING_COUNT) {
00074 fRollingClientUsecsIndex = 0;
00075 }
00076
00077
00078
00079
00080
00081 if (++fRollingClientUsecsCnt % fRollingInterval == 0) {
00082
00083 jack_time_t maxUsecs = 0;
00084 for (int i = 0; i < JACK_ENGINE_ROLLING_COUNT; i++) {
00085 maxUsecs = MAX(fRollingClientUsecs[i], maxUsecs);
00086 }
00087
00088 fMaxUsecs = MAX(fMaxUsecs, maxUsecs);
00089 fSpareUsecs = jack_time_t((maxUsecs < fEngineControl->fPeriodUsecs) ? fEngineControl->fPeriodUsecs - maxUsecs : 0);
00090 fEngineControl->fCPULoad
00091 = ((1.0f - (float(fSpareUsecs) / float(fEngineControl->fPeriodUsecs))) * 50.0f + (fEngineControl->fCPULoad * 0.5f));
00092 }
00093 }
00094
00095 void JackEngineTiming::ResetRollingUsecs()
00096 {
00097 memset(fRollingClientUsecs, 0, sizeof(fRollingClientUsecs));
00098 fRollingClientUsecsIndex = 0;
00099 fRollingClientUsecsCnt = 0;
00100 fSpareUsecs = 0;
00101 fRollingInterval = (int)floor((JACK_ENGINE_ROLLING_INTERVAL * 1000.0f) / fEngineControl->fPeriodUsecs);
00102 }
00103
00104 void JackEngineTiming::GetTimeMeasure(jack_time_t callbackUsecs)
00105 {
00106 int pos = (++fAudioCycle) % TIME_POINTS;
00107
00108 fLastTime = fCurTime;
00109 fCurTime = callbackUsecs;
00110
00111 fLastProcessTime = fProcessTime;
00112 fProcessTime = GetMicroSeconds();
00113
00114 if (fLastTime > 0) {
00115 fMeasure[pos].fEngineTime = fLastTime;
00116 fMeasure[pos].fAudioCycle = fAudioCycle;
00117
00118 for (int i = 0; i < CLIENT_NUM; i++) {
00119 JackClientInterface* client = fClientTable[i];
00120 JackClientTiming* timing = fGraphManager->GetClientTiming(i);
00121 if (client && client->GetClientControl()->fActive) {
00122 fMeasure[pos].fClientTable[i].fRefNum = i;
00123 fMeasure[pos].fClientTable[i].fSignaledAt = timing->fSignaledAt;
00124 fMeasure[pos].fClientTable[i].fAwakeAt = timing->fAwakeAt;
00125 fMeasure[pos].fClientTable[i].fFinishedAt = timing->fFinishedAt;
00126 fMeasure[pos].fClientTable[i].fStatus = timing->fStatus;
00127 }
00128 }
00129 }
00130 }
00131
00132 void JackEngineTiming::PrintState()
00133 {
00134 jack_time_t prevtime, time;
00135 prevtime = time = fMeasure[0].fEngineTime;
00136 int cycle, prevcycle = fMeasure[0].fAudioCycle;
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00211
00212 }
00213
00214 void JackEngineTiming::ClearTimeMeasures()
00215 {
00216 for (int i = 0; i < TIME_POINTS; i++) {
00217 for (int j = 0; j < CLIENT_NUM; j++) {
00218 fMeasure[i].fClientTable[j].fRefNum = 0;
00219 fMeasure[i].fClientTable[j].fSignaledAt = 0;
00220 fMeasure[i].fClientTable[j].fAwakeAt = 0;
00221 fMeasure[i].fClientTable[j].fFinishedAt = 0;
00222 }
00223 }
00224 fLastTime = fCurTime = 0;
00225 }
00226
00227
00228 }
00229