本文整理汇总了C++中DVBChannel::Tune方法的典型用法代码示例。如果您正苦于以下问题：C++ DVBChannel::Tune方法的具体用法？C++ DVBChannel::Tune怎么用？C++ DVBChannel::Tune使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类DVBChannel的用法示例。
在下文中一共展示了DVBChannel::Tune方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: Tune
/**
* \brief Tunes the card to a frequency but does not deal with PIDs.
*
* This is used by DVB Channel Scanner, the EIT Parser, and by TVRec.
*
* \param tuning Info on transport to tune to
* \param inputid Optional, forces specific input (for DiSEqC)
* \param force_reset If true, frequency tuning is done
* even if it should not be needed.
* \param same_input Optional, doesn't change input (for retuning).
* \return true on success, false on failure
*/
bool DVBChannel::Tune(const DTVMultiplex &tuning,
uint inputid,
bool force_reset,
bool same_input)
{
QMutexLocker lock(&tune_lock);
QMutexLocker locker(&hw_lock);
DVBChannel *master = GetMasterLock();
if (master != this)
{
LOG(VB_CHANNEL, LOG_INFO, LOC + "tuning on slave channel");
SetSIStandard(tuning.sistandard);
bool ok = master->Tune(tuning, inputid, force_reset, false);
ReturnMasterLock(master);
return ok;
}
ReturnMasterLock(master); // if we're the master we don't need this lock..
int intermediate_freq = 0;
bool can_fec_auto = false;
bool reset = (force_reset || first_tune);
if (tunerType.IsDiSEqCSupported() && !diseqc_tree)
{
LOG(VB_GENERAL, LOG_ERR, LOC +
"DVB-S needs device tree for LNB handling");
return false;
}
desired_tuning = tuning;
if (fd_frontend < 0)
{
LOG(VB_GENERAL, LOG_ERR, LOC + "Tune(): Card not open!");
return false;
}
// Remove any events in queue before tuning.
drain_dvb_events(fd_frontend);
// send DVB-S setup
if (diseqc_tree)
{
// configure for new input
if (!same_input)
diseqc_settings.Load(inputid);
// execute diseqc commands
if (!diseqc_tree->Execute(diseqc_settings, tuning))
{
LOG(VB_GENERAL, LOG_ERR, LOC +
"Tune(): Failed to setup DiSEqC devices");
return false;
}
// retrieve actual intermediate frequency
DiSEqCDevLNB *lnb = diseqc_tree->FindLNB(diseqc_settings);
if (!lnb)
{
LOG(VB_GENERAL, LOG_ERR, LOC +
"Tune(): No LNB for this configuration");
return false;
}
if (lnb->GetDeviceID() != last_lnb_dev_id)
{
last_lnb_dev_id = lnb->GetDeviceID();
// make sure we tune to frequency, if the lnb has changed
reset = first_tune = true;
}
intermediate_freq = lnb->GetIntermediateFrequency(
diseqc_settings, tuning);
// if card can auto-FEC, use it -- sometimes NITs are inaccurate
if (capabilities & FE_CAN_FEC_AUTO)
can_fec_auto = true;
// Check DVB-S intermediate frequency here since it requires a fully
// initialized diseqc tree
CheckFrequency(intermediate_freq);
}
LOG(VB_CHANNEL, LOG_INFO, LOC + "Old Params: " + prev_tuning.toString() +
"\n\t\t\t" + LOC + "New Params: " + tuning.toString());
//.........这里部分代码省略.........