C++ JackClientInterface类代码示例

void JackEngine::NotifyClient(int refnum, int event, int sync, const char* message, int value1, int value2)
{
    JackClientInterface* client = fClientTable[refnum];
    if (client) {
        ClientNotify(client, refnum, client->GetClientControl()->fName, event, sync, message, value1, value2);
    }
}

int JackEngine::ClientActivate(int refnum, bool is_real_time)
{
    JackClientInterface* client = fClientTable[refnum];
    jack_log("JackEngine::ClientActivate ref = %ld name = %s", refnum, client->GetClientControl()->fName);

    if (is_real_time) {
        fGraphManager->Activate(refnum);
    }

    // Wait for graph state change to be effective
    if (!fSignal.LockedTimedWait(fEngineControl->fTimeOutUsecs * 10)) {
        jack_error("JackEngine::ClientActivate wait error ref = %ld name = %s", refnum, client->GetClientControl()->fName);
        return -1;
    } else {
        jack_int_t input_ports[PORT_NUM_FOR_CLIENT];
        jack_int_t output_ports[PORT_NUM_FOR_CLIENT];
        fGraphManager->GetInputPorts(refnum, input_ports);
        fGraphManager->GetOutputPorts(refnum, output_ports);

        // Notify client
        NotifyActivate(refnum);

        // Then issue port registration notification
        for (int i = 0; (i < PORT_NUM_FOR_CLIENT) && (input_ports[i] != EMPTY); i++) {
            NotifyPortRegistation(input_ports[i], true);
        }
        for (int i = 0; (i < PORT_NUM_FOR_CLIENT) && (output_ports[i] != EMPTY); i++) {
            NotifyPortRegistation(output_ports[i], true);
        }

        return 0;
    }
}

int JackEngine::GetInternalClientName(int refnum, char* name_res)
{
    JackClientInterface* client = fClientTable[refnum];
    assert(client);
    strncpy(name_res, client->GetClientControl()->fName, JACK_CLIENT_NAME_SIZE);
    return 0;
}

// Used for external clients
int JackEngine::ClientExternalClose(int refnum)
{
    jack_log("JackEngine::ClientExternalClose ref = %ld", refnum);
    JackClientInterface* client = fClientTable[refnum];
    int res = ClientCloseAux(refnum, true);
    client->Close();
    delete client;
    return res;
}

int JackEngine::GetClientRefNum(const char* name)
{
    for (int i = 0; i < CLIENT_NUM; i++) {
        JackClientInterface* client = fClientTable[i];
        if (client && (strcmp(client->GetClientControl()->fName, name) == 0)) {
            return client->GetClientControl()->fRefNum;
        }
    }

    return -1;
}

void JackEngineControl::CalcCPULoad(JackClientInterface** table,
                                    JackGraphManager* manager,
                                    jack_time_t cur_cycle_begin,
                                    jack_time_t prev_cycle_end)
{
    fPrevCycleTime = fCurCycleTime;
    fCurCycleTime = cur_cycle_begin;
    jack_time_t last_cycle_end = prev_cycle_end;

    // In Asynchronous mode, last cycle end is the max of client end dates
    if (!fSyncMode) {
        for (int i = fDriverNum; i < CLIENT_NUM; i++) {
            JackClientInterface* client = table[i];
            JackClientTiming* timing = manager->GetClientTiming(i);
            if (client && client->GetClientControl()->fActive && timing->fStatus == Finished) {
                last_cycle_end = JACK_MAX(last_cycle_end, timing->fFinishedAt);
            }
        }
    }

    // Store the execution time for later averaging
    if (last_cycle_end > 0) {
        fRollingClientUsecs[fRollingClientUsecsIndex++] = last_cycle_end - fPrevCycleTime;
    }
    if (fRollingClientUsecsIndex >= JACK_ENGINE_ROLLING_COUNT) {
        fRollingClientUsecsIndex = 0;
    }

    // Each time we have a full set of iterations, recompute the current
    // usage from the latest JACK_ENGINE_ROLLING_COUNT client entries.
    if (fRollingClientUsecsCnt && (fRollingClientUsecsIndex == 0)) {
        jack_time_t avg_usecs = 0;
        jack_time_t max_usecs = 0;

        for (int i = 0; i < JACK_ENGINE_ROLLING_COUNT; i++) {
            avg_usecs += fRollingClientUsecs[i]; // This is really a running total to be averaged later
            max_usecs = JACK_MAX(fRollingClientUsecs[i], max_usecs);
        }

        fMaxUsecs = JACK_MAX(fMaxUsecs, max_usecs);

        if (max_usecs < ((fPeriodUsecs * 95) / 100)) {
            // Average the values from our JACK_ENGINE_ROLLING_COUNT array
            fSpareUsecs = (jack_time_t)(fPeriodUsecs - (avg_usecs / JACK_ENGINE_ROLLING_COUNT));
        } else {
            // Use the 'worst case' value (or zero if we exceeded 'fPeriodUsecs')
            fSpareUsecs = jack_time_t((max_usecs < fPeriodUsecs) ? fPeriodUsecs - max_usecs : 0);
        }

        fCPULoad = ((1.f - (float(fSpareUsecs) / float(fPeriodUsecs))) * 50.f + (fCPULoad * 0.5f));
    }

    fRollingClientUsecsCnt++;
}

// RT
bool JackTransportEngine::CheckAllRolling(JackClientInterface** table)
{
    for (int i = GetEngineControl()->fDriverNum; i < CLIENT_NUM; i++) {
        JackClientInterface* client = table[i];
        if (client && client->GetClientControl()->fTransportState != JackTransportRolling) {
            jack_log("CheckAllRolling ref = %ld is not rolling", i);
            return false;
        }
    }
    jack_log("CheckAllRolling");
    return true;
}

int JackEngine::InternalClientUnload(int refnum, int* status)
{
    JackClientInterface* client = fClientTable[refnum];
    if (client) {
        int res = client->Close();
        delete client;
        *status = 0;
        return res;
    } else {
        *status = (JackNoSuchClient | JackFailure);
        return -1;
    }
}

void JackEngine::EnsureUUID(int uuid)
{
    if (uuid > fMaxUUID) {
        fMaxUUID = uuid + 1;
    }

    for (int i = 0; i < CLIENT_NUM; i++) {
        JackClientInterface* client = fClientTable[i];
        if (client && (client->GetClientControl()->fSessionID == uuid)) {
            client->GetClientControl()->fSessionID = GetNewUUID();
        }
    }
}

int JackEngine::GetUUIDForClientName(const char *client_name, char *uuid_res)
{
    for (int i = 0; i < CLIENT_NUM; i++) {
        JackClientInterface* client = fClientTable[i];

        if (client && (strcmp(client_name, client->GetClientControl()->fName) == 0)) {
            snprintf(uuid_res, JACK_UUID_SIZE, "%d", client->GetClientControl()->fSessionID);
            return 0;
        }
    }
    // Did not find name.
    return -1;
}

// RT
void JackTransportEngine::MakeAllLocating(JackClientInterface** table)
{
    for (int i = GetEngineControl()->fDriverNum; i < CLIENT_NUM; i++) {
        JackClientInterface* client = table[i];
        if (client) {
            JackClientControl* control = client->GetClientControl();
            control->fTransportState = JackTransportStopped;
            control->fTransportSync = true;
            control->fTransportTimebase = true;
            jack_log("MakeAllLocating ref = %ld", i);
        }
    }
}

// RT
void JackTransportEngine::MakeAllStartingLocating(JackClientInterface** table)
{
    for (int i = GetEngineControl()->fDriverNum; i < CLIENT_NUM; i++) {
        JackClientInterface* client = table[i];
        if (client) {
            JackClientControl* control = client->GetClientControl();
            // Inactive clients don't have their process function called at all, so they must appear as already "rolling" for the transport....
            control->fTransportState = (control->fActive && control->fCallback[kRealTimeCallback]) ? JackTransportStarting : JackTransportRolling;
            control->fTransportSync = true;
            control->fTransportTimebase = true;
            jack_log("MakeAllStartingLocating ref = %ld", i);
        }
    }
}

int JackEngine::ClientHasSessionCallback(const char *name)
{
    JackClientInterface* client = NULL;
    for (int i = 0; i < CLIENT_NUM; i++) {
        client = fClientTable[i];
        if (client && (strcmp(client->GetClientControl()->fName, name) == 0)) {
            break;
        }
    }

    if (client) {
        return client->GetClientControl()->fCallback[kSessionCallback];
     } else {
        return -1;
    }
}

bool JackEngine::ClientCheckName(const char* name)
{
    for (int i = 0; i < CLIENT_NUM; i++) {
        JackClientInterface* client = fClientTable[i];
        if (client && (strcmp(client->GetClientControl()->fName, name) == 0)) {
            return true;
        }
    }

    for (std::map<int,std::string>::iterator i = fReservationMap.begin(); i != fReservationMap.end(); i++) {
        if (i->second == name) {
            return true;
        }
    }

    return false;
}

int JackEngine::InternalClientHandle(const char* client_name, int* status, int* int_ref)
{
    // Clear status
    *status = 0;

    for (int i = 0; i < CLIENT_NUM; i++) {
        JackClientInterface* client = fClientTable[i];
        if (client && dynamic_cast<JackLoadableInternalClient*>(client) && (strcmp(client->GetClientControl()->fName, client_name) == 0)) {
            jack_log("InternalClientHandle found client name = %s ref = %ld",  client_name, i);
            *int_ref = i;
            return 0;
        }
    }

    *status |= (JackNoSuchClient | JackFailure);
    return -1;
}