Initial import

1 files changed, 65 insertions, 0 deletions

diff --git a/xtract/xtract_vector.h b/xtract/xtract_vector.h
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+++ b/xtract/xtract_vector.h
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+/* libxtract feature extraction library
+ *  
+ * Copyright (C) 2006 Jamie Bullock
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
+ * USA.
+ */
+
+/* xtract_scalar.h: declares functions that extract a feature as a vector from an input vector */
+
+#ifndef XTRACT_VECTOR
+#define XTRACT_VECTOR
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Extracts normalized (0-1) frequency domain magnitude spectrum from time domain signal */
+int xtract_magnitude_spectrum(float *data, int N, void *argv, float *result);
+
+
+/* Autocorrelation */
+int xtract_autocorrelation(float *data, int N, void *argv, float *result);
+
+
+int xtract_autocorrelation_fft(float *data, int N, void *argv, float *result);
+
+/* Average Magnitude Difference Function */
+int xtract_amdf(float *data, int N, void *argv, float *result);
+    
+/* Average Squared Difference Function */
+int xtract_asdf(float *data, int N, void *argv, float *result);
+    
+/* MFCC */
+/* Rabiner */
+int xtract_mfcc(float *data, int N, void *argv, float *result);
+
+/* Bark band */
+
+int xtract_bark_coefficients(float *data, int N, void *argv, float *result);
+
+/* Discrete cosine transform */
+int xtract_dct(float *data, int N, void *argv, float *result);
+
+/* Frequency and amplitude of spectral peaks */
+/* Takes peak threshold as percentage below max peak, and sr as argv, returns a pointer to an array of size N, containing N/2 freqs and N/2 amplitudes, amplitudes are on a decibel scale with dbFS = 0 */
+int xtract_peaks(float *data, int N, void *argv, float *result);
+    
+#ifdef __cplusplus
+}
+#endif
+
+#endif