Changeset fe28ff3

Timestamp:

Sep 5, 2007, 9:37:09 PM (17 years ago)

Author:

Paul Brossier <piem@piem.org>

Branches:

feature/autosink, feature/cnn, feature/cnn_org, feature/constantq, feature/crepe, feature/crepe_org, feature/pitchshift, feature/pydocstrings, feature/timestretch, fix/ffmpeg5, master, pitchshift, sampler, timestretch, yinfft+

Children:

71d3bf0

Parents:

88199ce

Message:

minor corrections

Files:

• examples/aubiomfcc.c (modified) (2 diffs)
• src/aubio.h (modified) (1 diff)
• src/aubiofilterbank.c (modified) (2 diffs)
• src/aubiofilterbank.h (modified) (3 diffs)
• src/mfcc.h (modified) (1 diff)

examples/aubiomfcc.c

@@ -42 +42 @@
       aubio_pvoc_do (pv,ibuf, fftgrain);
       
-      //TODO: extract Magnitude buffer f_fvec from fftgrain cvec
-
-      //compute mfccs
-      aubio_mffc_do (magbuf, nframes, filterbank, outbuf);
+       
+      //compute mfcics
+      aubio_mffc_do(fftgrain->norm, nframes, filterbank, outbuf);
       
       
@@ -74 +73 @@
 int main(int argc, char **argv) {
   examples_common_init(argc,argv);
+  
+  //allocate and initialize mel filter bank
+  uint_t n_filters=20;
+  uint_t nyquist= samplerate / 2.; 
+
+  uint_t banksize = (uint) ( sizeof(aubio_mel_filter));
+  aubio_mel_filter * mf = (aubio_mel_filter *)getbytes(banksize);
+
+  mfilterbank->n_filters = 20;
+  mfilterbank->filters = (smpl_t **)getbytes(mf->n_filters * sizeof(smpl_t *));
+  for(n = 0; n < mf->n_filters; n++)
+    mf->filters[n] = (smpl_t *)getbytes((buffer_size/2+1) * sizeof(smpl_t));
+  
+  //populating the filter
+  new_aubio_mfcc(buffer_size, nyquist, XTRACT_EQUAL_GAIN, 80.0f, 18000.0f, mf->n_filters, mf->filters);
+
+  //process
   examples_common_process(aubio_process,process_print);
   examples_common_del();
   debug("End of program.\n");
   fflush(stderr);
+  
+  //destroying filterbank
+  free(mf);
+  
   return 0;
 }

src/aubio.h

@@ -80 +80 @@
 #include "onset.h"
 #include "tempo.h"
+#include "mfcc.h"
 
 #ifdef __cplusplus

src/aubiofilterbank.c

@@ -25 +25 @@
 // Initialization
 
-int aubio_mfcc_init(int N, float nyquist, int style, float freq_min, float freq_max, int freq_bands, float **fft_tables){
+int aubio_mfcc_init(int N, smpl_t nyquist, int style, smpl_t freq_min, smpl_t freq_max, int freq_bands, smpl_t **fft_tables){
 
     int n, i, k, *fft_peak, M, next_peak; 
-    float norm, mel_freq_max, mel_freq_min, norm_fact, height, inc, val, 
+    smpl_t norm, mel_freq_max, mel_freq_min, norm_fact, height, inc, val, 
         freq_bw_mel, *mel_peak, *height_norm, *lin_peak;
 
@@ -39 +39 @@
     freq_bw_mel = (mel_freq_max - mel_freq_min) / freq_bands;
 
-    mel_peak = (float *)malloc((freq_bands + 2) * sizeof(float)); 
+    mel_peak = (smpl_t *)malloc((freq_bands + 2) * sizeof(smpl_t)); 
     /* +2 for zeros at start and end */
-    lin_peak = (float *)malloc((freq_bands + 2) * sizeof(float));
+    lin_peak = (smpl_t *)malloc((freq_bands + 2) * sizeof(smpl_t));
     fft_peak = (int *)malloc((freq_bands + 2) * sizeof(int));
-    height_norm = (float *)malloc(freq_bands * sizeof(float));
+    height_norm = (smpl_t *)malloc(freq_bands * sizeof(smpl_t));
 
     if(mel_peak == NULL || height_norm == NULL || 

src/aubiofilterbank.h

@@ -18 +18 @@
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
 */
 
 #ifndef AUBIOFILTERBANK_H
-#include AUBIOFILTERBANK_H
+#define AUBIOFILTERBANK_H
 
-#define NYQUIST 22050.f
 
 // Struct Declaration
@@ -31 +29 @@
 typedef struct aubio_mel_filter_ {
     int n_filters;
-    float **filters;
+    smpl_t **filters;
 } aubio_mel_filter;
 
@@ -40 +38 @@
  * It is up to the caller to pass in a pointer to memory allocated for freq_bands arrays of length N. This function populates these arrays with magnitude coefficients representing the mel filterbank on a linear scale 
  */
-int aubio_mfcc_init(int N, float nyquist, int style, float freq_min, float freq_max, int freq_bands, float **fft_tables);
+int aubio_mfcc_init(int N, float nyquist, int style, float freq_min, float freq_max, int freq_bands, smpl_t ** fft_tables);
 
 #endif

src/mfcc.h

@@ -23 +23 @@
 #ifndef MFCC_H 
 #define MFCC_H 
+
+#include "aubiofilterbank.h"
 
 #define NYQUIST 22050.f