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| author | Jamie Bullock <jamie@jamiebullock.com> | 2014-06-06 09:55:01 +0100 |
|---|---|---|
| committer | Jamie Bullock <jamie@jamiebullock.com> | 2014-06-06 09:55:01 +0100 |
| commit | e028f0d8204722f01495ec28edadbb4bdf1b6f1b (patch) | |
| tree | ebe19aef151d7f34755163db7c83edd64cdb45b3 /examples/simpletest | |
| parent | 0c54ec464079b450e07abe57be680ab88249b76a (diff) | |
| download | LibXtract-e028f0d8204722f01495ec28edadbb4bdf1b6f1b.tar.gz LibXtract-e028f0d8204722f01495ec28edadbb4bdf1b6f1b.tar.bz2 LibXtract-e028f0d8204722f01495ec28edadbb4bdf1b6f1b.zip | |
Add new helper function xtract_smoothed(), e.g. can be used to extract smoothed spectrum
Diffstat (limited to 'examples/simpletest')
| -rw-r--r-- | examples/simpletest/simpletest.cpp | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/examples/simpletest/simpletest.cpp b/examples/simpletest/simpletest.cpp index 40bcfeb..a0ae8d4 100644 --- a/examples/simpletest/simpletest.cpp +++ b/examples/simpletest/simpletest.cpp @@ -31,6 +31,7 @@ #include "xtract/libxtract.h" #include "xtract/xtract_stateful.h" #include "xtract/xtract_scalar.h" +#include "xtract/xtract_helper.h" #include "WaveFile.h" #ifndef M_PI @@ -50,7 +51,7 @@ waveform_type; #define BLOCKSIZE 512 #define MAVG_COUNT 10 -#define HALF_BLOCKSIZE BLOCKSIZE >> 1 +#define HALF_BLOCKSIZE (BLOCKSIZE >> 1) #define SAMPLERATE 44100 #define PERIOD 102 #define MFCC_FREQ_BANDS 13 @@ -202,7 +203,6 @@ int main(void) xtract_free_fft(); xtract[XTRACT_SPECTRAL_CENTROID](spectrum, BLOCKSIZE, NULL, ¢roid); -// printf("\nSpectral Centroid: %f\t", centroid); argd[1] = 10.0; /* peak threshold as % of maximum peak */ xtract[XTRACT_PEAK_SPECTRUM](spectrum, BLOCKSIZE / 2, argd, peaks); @@ -250,6 +250,13 @@ int main(void) xtract_features_from_subframes(subframes_windowed, BLOCKSIZE, XTRACT_SPECTRUM, argd, subframes_spectrum); xtract_free_fft(); + argd[0] = 0.5; /* smoothing factor */ + + /* smooth the amplitude components of the first and second spectra */ + xtract_smoothed(subframes_spectrum, HALF_BLOCKSIZE >> 1, argd, subframes_spectrum); + xtract_smoothed(subframes_spectrum + HALF_BLOCKSIZE, HALF_BLOCKSIZE >> 1, argd, subframes_spectrum + HALF_BLOCKSIZE); + + /* difference between the two spectra */ xtract_difference_vector(subframes_spectrum, BLOCKSIZE, NULL, difference); argd[0] = .25; /* norm order */ |