diff xtract/libxtract.h @ 104:a32738e9d955

- Fixes to descriptors.c where no break statement was given for certain cases is switch conditionals
- Added LPC and LPCC extraction functions. LPC implements Durbin method as described in Rabiner and Juang and implemented in Dr. Dobbs 1994 edition by Jutta Degener

--- a/xtract/libxtract.h	Fri Dec 21 11:05:20 2007 +0000
+++ b/xtract/libxtract.h	Mon Dec 24 13:21:13 2007 +0000
@@ -56,7 +56,7 @@
   * @{
   */
 
-#define XTRACT_FEATURES 54
+#define XTRACT_FEATURES 56
     
 /** \brief Enumeration of features, elements are used as indixes to an array of pointers to feature extracton functions */
 enum xtract_features_ {
@@ -113,7 +113,9 @@
     XTRACT_AUTOCORRELATION_FFT,
     XTRACT_MFCC,
     XTRACT_DCT,
-    XTRACT_HARMONIC_SPECTRUM
+    XTRACT_HARMONIC_SPECTRUM,
+    XTRACT_LPC,
+    XTRACT_LPCC
 };
 
 /** \brief Enumeration of feature initialisation functions */
@@ -198,9 +200,12 @@
     XTRACT_SPECTRAL_HARMONICS_MAGNITUDES,
     /* N spectral harmonic frequencies */
     XTRACT_SPECTRAL_HARMONICS_FREQUENCIES,
+    XTRACT_AUTOCORRELATION_COEFFS,
     XTRACT_ARBITRARY_SERIES,
     XTRACT_AUDIO_SAMPLES,
     XTRACT_MEL_COEFFS, 
+    XTRACT_LPC_COEFFS, 
+    XTRACT_LPCC_COEFFS, 
     XTRACT_BARK_COEFFS,
     XTRACT_NO_DATA
 } xtract_vector_t;