48 Plugin(inputSampleRate),
50 m_previousSample(0.0f)
61 return "zerocrossing";
67 return "Zero Crossings";
73 return "Detect and count zero crossing points";
79 return "Vamp SDK Example Plugins";
91 return "Freely redistributable (BSD license)";
118 zc.
name =
"Zero Crossing Counts";
119 zc.
description =
"The number of zero crossing points per processing block";
120 zc.
unit =
"crossings";
126 zc.
sampleType = OutputDescriptor::OneSamplePerStep;
130 zc.
name =
"Zero Crossings";
131 zc.
description =
"The locations of zero crossing points";
135 zc.
sampleType = OutputDescriptor::VariableSampleRate;
147 cerr <<
"ERROR: ZeroCrossing::process: "
148 <<
"ZeroCrossing has not been initialised"
160 float sample = inputBuffers[0][i];
161 bool crossing =
false;
164 if (prev > 0.0) crossing =
true;
165 }
else if (sample > 0.0) {
166 if (prev <= 0.0) crossing =
true;
175 returnFeatures[1].push_back(feature);
185 feature.
values.push_back(
float(count));
187 returnFeatures[0].push_back(feature);
188 return returnFeatures;
virtual size_t getMaxChannelCount() const
Get the maximum supported number of input channels.
std::vector< OutputDescriptor > OutputList
std::map< int, FeatureList > FeatureSet
virtual size_t getMinChannelCount() const
Get the minimum supported number of input channels.
std::string getName() const
Get a human-readable name or title of the plugin.
int getPluginVersion() const
Get the version number of the plugin.
FeatureSet getRemainingFeatures()
After all blocks have been processed, calculate and return any remaining features derived from the co...
std::string getDescription() const
Get a human-readable description for the plugin, typically a line of text that may optionally be disp...
ZeroCrossing(float inputSampleRate)
void reset()
Reset the plugin after use, to prepare it for another clean run.
std::string getMaker() const
Get the name of the author or vendor of the plugin in human-readable form.
OutputList getOutputDescriptors() const
Get the outputs of this plugin.
FeatureSet process(const float *const *inputBuffers, Vamp::RealTime timestamp)
Process a single block of input data.
bool initialise(size_t channels, size_t stepSize, size_t blockSize)
Initialise a plugin to prepare it for use with the given number of input channels,...
std::string getIdentifier() const
Get the computer-usable name of the plugin.
std::string getCopyright() const
Get the copyright statement or licensing summary for the plugin.
std::vector< float > values
Results for a single sample of this feature.
bool hasTimestamp
True if an output feature has its own timestamp.
RealTime timestamp
Timestamp of the output feature.
SampleType sampleType
Positioning in time of the output results.
bool isQuantized
True if the output values are quantized to a particular resolution.
float quantizeStep
Quantization resolution of the output values (e.g.
std::string unit
The unit of the output, in human-readable form.
std::string name
The human-readable name of the output.
float sampleRate
Sample rate of the output results, as samples per second.
std::string identifier
The name of the output, in computer-usable form.
bool hasKnownExtents
True if the results in each output bin fall within a fixed numeric range (minimum and maximum values)...
bool hasFixedBinCount
True if the output has the same number of values per sample for every output sample.
std::string description
A human-readable short text describing the output.
size_t binCount
The number of values per result of the output.
RealTime represents time values to nanosecond precision with accurate arithmetic and frame-rate conve...
static RealTime frame2RealTime(long frame, unsigned int sampleRate)
Convert a sample frame at the given sample rate into a RealTime.