本文整理汇总了C++中typename_istreamlist::iterator::nelems方法的典型用法代码示例。如果您正苦于以下问题：C++ iterator::nelems方法的具体用法？C++ iterator::nelems怎么用？C++ iterator::nelems使用的例子？那么恭喜您, 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typename_istreamlist::iterator的用法示例。
在下文中一共展示了iterator::nelems方法的2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: while
template < typename IN_PORT_TYPE, typename OUT_PORT_TYPE > int copy_bb_base::_forecastAndProcess( bool &eos, typename std::vector< gr_istream< IN_PORT_TYPE > > &istreams ,
typename std::vector< gr_ostream< OUT_PORT_TYPE > > &ostreams )
{
typedef typename std::vector< gr_istream< IN_PORT_TYPE > > _IStreamList;
typedef typename std::vector< gr_ostream< OUT_PORT_TYPE > > _OStreamList;
typename _OStreamList::iterator ostream;
typename _IStreamList::iterator istream = istreams.begin();
int nout = 0;
bool dataReady = false;
if ( !eos ) {
uint64_t max_items_avail = 0;
for ( int idx=0 ; istream != istreams.end() && serviceThread->threadRunning() ; idx++, istream++ ) {
LOG_TRACE( copy_bb_base, "GET MAX ITEMS: STREAM:"<< idx << " NITEMS/SCALARS:" <<
istream->nitems() << "/" << istream->_data.size() );
max_items_avail = std::max( istream->nitems(), max_items_avail );
}
if ( max_items_avail == 0 ) {
LOG_TRACE( copy_bb_base, "DATA CHECK - MAX ITEMS NOUTPUT/MAX_ITEMS:" << noutput_items << "/" << max_items_avail);
return -1;
}
//
// calc number of output elements based on input items available
//
noutput_items = 0;
if ( !gr_sptr->fixed_rate() ) {
noutput_items = round_down((int32_t) (max_items_avail * gr_sptr->relative_rate()), gr_sptr->output_multiple());
LOG_TRACE( copy_bb_base, " VARIABLE FORECAST NOUTPUT == " << noutput_items );
} else {
istream = istreams.begin();
for ( int i=0; istream != istreams.end(); i++, istream++ ) {
int t_noutput_items = gr_sptr->fixed_rate_ninput_to_noutput( istream->nitems() );
if ( gr_sptr->output_multiple_set() ) {
t_noutput_items = round_up(t_noutput_items, gr_sptr->output_multiple());
}
if ( t_noutput_items > 0 ) {
if ( noutput_items == 0 ) {
noutput_items = t_noutput_items;
}
if ( t_noutput_items <= noutput_items ) {
noutput_items = t_noutput_items;
}
}
}
LOG_TRACE( copy_bb_base, " FIXED FORECAST NOUTPUT/output_multiple == " <<
noutput_items << "/" << gr_sptr->output_multiple());
}
//
// ask the block how much input they need to produce noutput_items...
// if enough data is available to process then set the dataReady flag
//
int32_t outMultiple = gr_sptr->output_multiple();
while ( !dataReady && noutput_items >= outMultiple ) {
//
// ask the block how much input they need to produce noutput_items...
//
gr_sptr->forecast(noutput_items, _ninput_items_required);
LOG_TRACE( copy_bb_base, "--> FORECAST IN/OUT " << _ninput_items_required[0] << "/" << noutput_items );
istream = istreams.begin();
uint32_t dr_cnt=0;
for ( int idx=0 ; noutput_items > 0 && istream != istreams.end(); idx++, istream++ ) {
// check if buffer has enough elements
_input_ready[idx] = false;
if ( istream->nitems() >= (uint64_t)_ninput_items_required[idx] ) {
_input_ready[idx] = true;
dr_cnt++;
}
LOG_TRACE( copy_bb_base, "ISTREAM DATACHECK NELMS/NITEMS/REQ/READY:" << istream->nelems() <<
"/" << istream->nitems() << "/" << _ninput_items_required[idx] << "/" << _input_ready[idx]);
}
if ( dr_cnt < istreams.size() ) {
if ( outMultiple > 1 ) {
noutput_items -= outMultiple;
} else {
noutput_items /= 2;
}
} else {
dataReady = true;
}
LOG_TRACE( copy_bb_base, " TRIM FORECAST NOUTPUT/READY " << noutput_items << "/" << dataReady );
}
// check if data is ready...
if ( !dataReady ) {
LOG_TRACE( copy_bb_base, "DATA CHECK - NOT ENOUGH DATA AVAIL/REQ:" << _istreams[0].nitems() <<
"/" << _ninput_items_required[0] );
return -1;
}
// reset looping variables
int ritems = 0;
int nitems = 0;
// reset caching vectors
//.........这里部分代码省略.........
示例2: while
template < typename IN_PORT_TYPE > int tagged_file_sink_b_base::_forecastAndProcess( bool &eos, typename std::vector< gr_istream< IN_PORT_TYPE > > &istreams )
{
typedef typename std::vector< gr_istream< IN_PORT_TYPE > > _IStreamList;
typename _IStreamList::iterator istream = istreams.begin();
int nout = 0;
bool dataReady = false;
if ( !eos ) {
uint64_t max_items_avail = 0;
for ( int idx=0 ; istream != istreams.end() && serviceThread->threadRunning() ; idx++, istream++ ) {
LOG_TRACE( tagged_file_sink_b_base, "GET MAX ITEMS: STREAM:" << idx << " NITEMS/SCALARS:"
<< istream->nitems() << "/" << istream->_data.size() );
max_items_avail = std::max( istream->nitems(), max_items_avail );
}
//
// calc number of output items to produce
//
noutput_items = (int) (max_items_avail * gr_sptr->relative_rate ());
noutput_items = round_down (noutput_items, gr_sptr->output_multiple ());
if ( noutput_items <= 0 ) {
LOG_TRACE( tagged_file_sink_b_base, "DATA CHECK - MAX ITEMS NOUTPUT/MAX_ITEMS:" << noutput_items << "/" << max_items_avail);
return -1;
}
if ( gr_sptr->fixed_rate() ) {
istream = istreams.begin();
for ( int i=0; istream != istreams.end(); i++, istream++ ) {
int t_noutput_items = gr_sptr->fixed_rate_ninput_to_noutput( istream->nitems() );
if ( gr_sptr->output_multiple_set() ) {
t_noutput_items = round_up(t_noutput_items, gr_sptr->output_multiple());
}
if ( t_noutput_items > 0 ) {
if ( noutput_items == 0 ) {
noutput_items = t_noutput_items;
}
if ( t_noutput_items <= noutput_items ) {
noutput_items = t_noutput_items;
}
}
}
LOG_TRACE( tagged_file_sink_b_base, " FIXED FORECAST NOUTPUT/output_multiple == "
<< noutput_items << "/" << gr_sptr->output_multiple());
}
//
// ask the block how much input they need to produce noutput_items...
// if enough data is available to process then set the dataReady flag
//
int32_t outMultiple = gr_sptr->output_multiple();
while ( !dataReady && noutput_items >= outMultiple ) {
//
// ask the block how much input they need to produce noutput_items...
//
gr_sptr->forecast(noutput_items, _ninput_items_required);
LOG_TRACE( tagged_file_sink_b_base, "--> FORECAST IN/OUT " << _ninput_items_required[0] << "/" << noutput_items );
istream = istreams.begin();
uint32_t dr_cnt=0;
for ( int idx=0 ; noutput_items > 0 && istream != istreams.end(); idx++, istream++ ) {
// check if buffer has enough elements
_input_ready[idx] = false;
if ( istream->nitems() >= (uint64_t)_ninput_items_required[idx] ) {
_input_ready[idx] = true;
dr_cnt++;
}
LOG_TRACE( tagged_file_sink_b_base, "ISTREAM DATACHECK NELMS/NITEMS/REQ/READY:" <<
istream->nelems() << "/" << istream->nitems() << "/" <<
_ninput_items_required[idx] << "/" << _input_ready[idx]);
}
if ( dr_cnt < istreams.size() ) {
if ( outMultiple > 1 ) {
noutput_items -= outMultiple;
} else {
noutput_items /= 2;
}
} else {
dataReady = true;
}
LOG_TRACE( tagged_file_sink_b_base, " TRIM FORECAST NOUTPUT/READY " << noutput_items << "/" << dataReady );
}
// check if data is ready...
if ( !dataReady ) {
LOG_TRACE( tagged_file_sink_b_base, "DATA CHECK - NOT ENOUGH DATA AVAIL/REQ:"
<< _istreams[0].nitems() << "/" << _ninput_items_required[0] );
return -1;
}
// reset looping variables
int ritems = 0;
int nitems = 0;
// reset caching vectors
_output_items.clear();
_input_items.clear();
_ninput_items.clear();
//.........这里部分代码省略.........