ardour/livetrax
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Prefer const references for Pin/Channel maps

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Another micro-optmization shaving off some ten microseconds for every
plugin. Also copying maps isn't RT-safe.

This may however cause issue if const map references can change
while a plugin is running.
This commit is contained in:
Robin Gareus 2018-11-04 03:25:36 +01:00
parent e4c7cb1e75
commit 8d6d0b3232
1 changed files with 11 additions and 12 deletions
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23
libs/ardour/plugin_insert.cc
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@ -824,14 +824,14 @@ PluginInsert::inplace_silence_unconnected (BufferSet& bufs, const PinMappings& o
void
PluginInsert::connect_and_run (BufferSet& bufs, samplepos_t start, samplepos_t end, double speed, pframes_t nframes, samplecnt_t offset, bool with_auto)
{
// TODO: atomically copy maps & _no_inplace
PinMappings in_map (_in_map);
PinMappings out_map (_out_map);
ChanMapping thru_map (_thru_map);
if (_mapping_changed) { // ToDo use a counters, increment until match.
if (_mapping_changed) { // ToDo use a counter, increment until match
_no_inplace = check_inplace ();
_mapping_changed = false;
}
// TODO: atomically copy maps & _no_inplace
PinMappings in_map (_in_map); // TODO Split case below overrides, use const& in_map
PinMappings const& out_map (_out_map);
ChanMapping const& thru_map (_thru_map);
if (_latency_changed) {
/* delaylines are configured with the max possible latency (as reported by the plugin)
@ -1081,14 +1081,13 @@ PluginInsert::bypass (BufferSet& bufs, pframes_t nframes)
/* bypass the plugin(s) not the whole processor.
* -> use mappings just like connect_and_run
*/
// TODO: atomically copy maps & _no_inplace
const ChanMapping in_map (no_sc_input_map ());
const ChanMapping out_map (output_map ());
if (_mapping_changed) {
_no_inplace = check_inplace ();
_mapping_changed = false;
}
// TODO: atomically copy maps & _no_inplace
ChanMapping const& in_map (no_sc_input_map ());
ChanMapping const& out_map (output_map ());
bufs.set_count(ChanCount::max(bufs.count(), _configured_internal));
bufs.set_count(ChanCount::max(bufs.count(), _configured_out));
@ -1198,8 +1197,8 @@ PluginInsert::silence (samplecnt_t nframes, samplepos_t start_sample)
_delaybuffers.flush ();
ChanMapping in_map (natural_input_streams ());
ChanMapping out_map (natural_output_streams ());
const ChanMapping in_map (natural_input_streams ());
const ChanMapping out_map (natural_output_streams ());
ChanCount maxbuf = ChanCount::max (natural_input_streams (), natural_output_streams());
#ifdef MIXBUS
if (is_channelstrip ()) {
@ -1646,7 +1645,7 @@ PluginInsert::check_inplace ()
*
* but allows in-port 1 -> sink-pin 2 || source-pin 2 -> out port 1
*/
ChanMapping in_map (input_map ());
ChanMapping const& in_map (input_map ());
const ChanMapping::Mappings out_m (output_map ().mappings ());
for (ChanMapping::Mappings::const_iterator t = out_m.begin (); t != out_m.end () && inplace_ok; ++t) {
for (ChanMapping::TypeMapping::const_iterator c = (*t).second.begin (); c != (*t).second.end () ; ++c) {