diff options
author | Paul Davis <paul@linuxaudiosystems.com> | 2008-06-02 21:41:35 +0000 |
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committer | Paul Davis <paul@linuxaudiosystems.com> | 2008-06-02 21:41:35 +0000 |
commit | 449aab3c465bbbf66d221fac3d7ea559f1720357 (patch) | |
tree | 6843cc40c88250a132acac701271f1504cd2df04 /libs/ardour/transient_detector.cc | |
parent | 9c0d7d72d70082a54f823cd44c0ccda5da64bb6f (diff) |
rollback to 3428, before the mysterious removal of libs/* at 3431/3432
git-svn-id: svn://localhost/ardour2/branches/3.0@3435 d708f5d6-7413-0410-9779-e7cbd77b26cf
Diffstat (limited to 'libs/ardour/transient_detector.cc')
-rw-r--r-- | libs/ardour/transient_detector.cc | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/libs/ardour/transient_detector.cc b/libs/ardour/transient_detector.cc new file mode 100644 index 0000000000..d3200d72e4 --- /dev/null +++ b/libs/ardour/transient_detector.cc @@ -0,0 +1,118 @@ +#include <ardour/transient_detector.h> + +#include "i18n.h" + +using namespace Vamp; +using namespace ARDOUR; +using namespace std; + +/* need a static initializer function for this */ + +string TransientDetector::_op_id = X_("libardourvampplugins:percussiononsets:2"); + +TransientDetector::TransientDetector (float sr) + : AudioAnalyser (sr, X_("libardourvampplugins:percussiononsets")) +{ + /* update the op_id */ + + _op_id = X_("libardourvampplugins:percussiononsets"); + + // XXX this should load the above-named plugin and get the current version + + _op_id += ":2"; +} + +TransientDetector::~TransientDetector() +{ +} + +string +TransientDetector::operational_identifier() +{ + return _op_id; +} + +int +TransientDetector::run (const std::string& path, Readable* src, uint32_t channel, AnalysisFeatureList& results) +{ + current_results = &results; + int ret = analyse (path, src, channel); + + current_results = 0; + return ret; +} + +int +TransientDetector::use_features (Plugin::FeatureSet& features, ostream* out) +{ + const Plugin::FeatureList& fl (features[0]); + + for (Plugin::FeatureList::const_iterator f = fl.begin(); f != fl.end(); ++f) { + + if ((*f).hasTimestamp) { + + if (out) { + (*out) << (*f).timestamp.toString() << endl; + } + + current_results->push_back (RealTime::realTime2Frame ((*f).timestamp, (nframes_t) floor(sample_rate))); + } + } + + return 0; +} + +void +TransientDetector::set_threshold (float val) +{ + if (plugin) { + plugin->setParameter ("threshold", val); + } +} + +void +TransientDetector::set_sensitivity (float val) +{ + if (plugin) { + plugin->setParameter ("sensitivity", val); + } +} + +void +TransientDetector::cleanup_transients (AnalysisFeatureList& t, float sr, float gap_msecs) +{ + if (t.empty()) { + return; + } + + t.sort (); + + /* remove duplicates or other things that are too close */ + + AnalysisFeatureList::iterator i = t.begin(); + AnalysisFeatureList::iterator f, b; + const nframes64_t gap_frames = (nframes64_t) floor (gap_msecs * (sr / 1000.0)); + + while (i != t.end()) { + + // move front iterator to just past i, and back iterator the same place + + f = i; + ++f; + b = f; + + // move f until we find a new value that is far enough away + + while ((f != t.end()) && (((*f) - (*i)) < gap_frames)) { + ++f; + } + + i = f; + + // if f moved forward from b, we had duplicates/too-close points: get rid of them + + if (b != f) { + t.erase (b, f); + } + } +} |