1 files changed, 55 insertions, 0 deletions
diff --git a/src/sms/stocAnalysis.c b/src/sms/stocAnalysis.c
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+++ b/src/sms/stocAnalysis.c
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+/* 
+ * Copyright (c) 2008 MUSIC TECHNOLOGY GROUP (MTG)
+ *                         UNIVERSITAT POMPEU FABRA 
+ * 
+ * 
+ * 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., 59 Temple Place, Suite 330, Boston, M  02111-1307  USA
+ * 
+ */
+/*! \file stocAnalysis.c
+ * \brief stochastic analysis using spectral analysis and approximation
+ */
+#include "sms.h"
+
+/*! \brief main function for the stochastic analysis
+ * \param sizeWindow   size of buffer
+ * \param pResidual    pointer to residual signal
+ * \param pWindow      pointer to windowing array
+ * \param pSmsData     pointer to output SMS data
+ * \param pAnalParams  point to analysis parameters
+ * \return 0 on success, -1 on error
+ */
+int sms_stocAnalysis(int sizeWindow, sfloat *pResidual, sfloat *pWindow, 
+                     SMS_Data *pSmsData, SMS_AnalParams* pAnalParams)
+{
+    int i;
+    sfloat fMag = 0.0;
+
+    sms_spectrumMag(sizeWindow, pResidual, pWindow, pAnalParams->sizeStocMagSpectrum,
+                    pAnalParams->stocMagSpectrum, pAnalParams->fftBuffer);
+
+    sms_spectralApprox(pAnalParams->stocMagSpectrum, pAnalParams->sizeStocMagSpectrum, 
+                       pAnalParams->sizeStocMagSpectrum, pSmsData->pFStocCoeff, 
+                       pSmsData->nCoeff, pSmsData->nCoeff,
+                       pAnalParams->approxEnvelope);
+
+    /* get energy of spectrum  */
+    for(i = 0; i < pAnalParams->sizeStocMagSpectrum; i++)
+        fMag += (pAnalParams->stocMagSpectrum[i] * pAnalParams->stocMagSpectrum[i]);
+
+    *pSmsData->pFStocGain = fMag / pAnalParams->sizeStocMagSpectrum;
+    return 0;
+}
+