cannam@0: 
cannam@0: Status of libxtract features implemented via vamp-libxtract.
cannam@0: 
cannam@0: A feature is described as "plausible" if it runs without crashing on a
cannam@0: test audio file in Sonic Visualiser and produces real valued results
cannam@0: that are not always zero and look (to the uneducated) as if they might
cannam@0: be in a sensible range.
cannam@0: 
cannam@0: A features is "suspect" if it returns results but they look like
cannam@0: they're all over the place.  Other failures are marked accordingly.  I
cannam@0: have no idea whether these fail in SV, the plugin, or the extraction
cannam@0: code.  The ones that seem to need investigating are marked with a *.
cannam@0: 
cannam@0: For simple features like mean, variance etc the plugin just extracts
cannam@0: the feature from the spectrum magnitudes of each block.
cannam@0: 
cannam@0:     MEAN		  Plausible
cannam@0:     VARIANCE		  Plausible
cannam@0:     STANDARD_DEVIATION	  Plausible
cannam@0:     AVERAGE_DEVIATION	  Plausible
cannam@0:     SKEWNESS		* Suspect
cannam@0:     KURTOSIS		* Suspect
cannam@0:     CENTROID		  Plausible
cannam@0:     IRREGULARITY_K	* All zeroes
cannam@0:     IRREGULARITY_J	* No data
cannam@0:     TRISTIMULUS_1	  Not implemented (no harmonic spectrum input)
cannam@0:     TRISTIMULUS_2	  Not implemented (no harmonic spectrum input)
cannam@0:     TRISTIMULUS_3	  Not implemented (no harmonic spectrum input)
cannam@0:     SMOOTHNESS		  Plausible
cannam@0:     SPREAD		  Plausible
cannam@0:     ZCR			  Plausible
cannam@0:     ROLLOFF		* Not sure (does produce some data)
cannam@0:     LOUDNESS		* Does not complete (wild value exposes SV bug?)
cannam@0:     FLATNESS		  Plausible
cannam@0:     TONALITY		  Not implemented (code looks wrong in scalar.c)
cannam@0:     CREST		  Not implemented in libxtract
cannam@0:     NOISINESS		  Not implemented in libxtract
cannam@0:     RMS_AMPLITUDE	  Plausible
cannam@0:     INHARMONICITY	* Fails to find fundamental frequencies in my test file
cannam@0:     POWER		  Not implemented in libxtract
cannam@0:     ODD_EVEN_RATIO	  Not implemented (no harmonic spectrum input)
cannam@0:     SHARPNESS		  Not implemented in libxtract
cannam@0:     SLOPE		  Not implemented in libxtract
cannam@0:     LOWEST_MATCH	  Not implemented
cannam@0:     HPS			  Not implemented (libxtract code says it doesn't work)
cannam@0:     F0			* Fails to find fundamental frequencies in my test file
cannam@0:     FLUX		  Not implemented in libxtract
cannam@0:     ATTACK_TIME		  Not implemented in libxtract
cannam@0:     DECAY_TIME		  Not implemented in libxtract
cannam@0:     DELTA_FEATURE	  Not implemented in libxtract
cannam@0:     AUTOCORRELATION	  Plausible (how should the output be represented?)
cannam@0:     AMDF		  Plausible (how should the output be represented?)
cannam@0:     ASDF		  Plausible (how should the output be represented?)
cannam@0:     BARK_COEFFICIENTS	  Plausible
cannam@0:     PEAKS		  Plausible
cannam@0:     MAGNITUDE_SPECTRUM	  Plausible
cannam@0:     AUTOCORRELATION_FFT	  Plausible (how should the output be represented?)
cannam@0:     MFCC		* All zeroes
cannam@0:     DCT			  Plausible
cannam@0: