init

2025-10-14 19:38:23 -05:00
commit d86bd19ed2
1456 changed files with 1054347 additions and 0 deletions
--- a/Drivers/CMSIS/DSP/Source/TransformFunctions/arm_mfcc_f16.c
+++ b/Drivers/CMSIS/DSP/Source/TransformFunctions/arm_mfcc_f16.c
@@ -0,0 +1,161 @@
+/* ----------------------------------------------------------------------
+ * Project:      CMSIS DSP Library
+ * Title:        arm_mfcc_f16.c
+ * Description:  MFCC function for the f16 version
+ *
+ * $Date:        07 September 2021
+ * $Revision:    V1.10.0
+ *
+ * Target Processor: Cortex-M and Cortex-A cores
+ * -------------------------------------------------------------------- */
+/*
+ * Copyright (C) 2010-2021 ARM Limited or its affiliates. All rights reserved.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the License); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an AS IS BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+#include "dsp/transform_functions_f16.h"
+#include "dsp/statistics_functions_f16.h"
+#include "dsp/basic_math_functions_f16.h"
+#include "dsp/complex_math_functions_f16.h"
+#include "dsp/fast_math_functions_f16.h"
+#include "dsp/matrix_functions_f16.h"
+
+#if defined(ARM_FLOAT16_SUPPORTED)
+
+/**
+  @ingroup groupTransforms
+ */
+
+
+/**
+  @defgroup MFCC MFCC
+
+  MFCC Transform
+
+  There are separate functions for floating-point, Q15, and Q31 data types.
+ */
+
+
+
+/**
+  @addtogroup MFCC
+  @{
+ */
+
+/**
+  @brief         MFCC F16
+  @param[in]    S       points to the mfcc instance structure
+  @param[in]     pSrc points to the input samples
+  @param[out]     pDst  points to the output MFCC values
+  @param[inout]     pTmp  points to a temporary buffer of complex
+
+  @return        none
+
+  @par           Description
+                   The number of input samples if the FFT length used
+                   when initializing the instance data structure.
+
+                   The temporary buffer has a 2*fft length size when MFCC
+                   is implemented with CFFT.
+                   It has length FFT Length + 2 when implemented with RFFT
+                   (default implementation).
+
+                   The source buffer is modified by this function.
+
+ */
+void arm_mfcc_f16(
+  const arm_mfcc_instance_f16 * S,
+  float16_t *pSrc,
+  float16_t *pDst,
+  float16_t *pTmp
+  )
+{
+  float16_t maxValue;
+  uint32_t  index; 
+  uint32_t i;
+  float16_t result;
+  const float16_t *coefs=S->filterCoefs;
+  arm_matrix_instance_f16 pDctMat;
+
+  /* Normalize */
+  arm_absmax_f16(pSrc,S->fftLen,&maxValue,&index);
+
+  arm_scale_f16(pSrc,1.0f16/(_Float16)maxValue,pSrc,S->fftLen);
+
+  /* Multiply by window */
+  arm_mult_f16(pSrc,S->windowCoefs,pSrc,S->fftLen);
+
+  /* Compute spectrum magnitude 
+  */
+#if defined(ARM_MFCC_CFFT_BASED)
+  /* some HW accelerator for CMSIS-DSP used in some boards
+     are only providing acceleration for CFFT.
+     With ARM_MFCC_CFFT_BASED enabled, CFFT is used and the MFCC
+     will be accelerated on those boards.
+ 
+     The default is to use RFFT
+  */
+  /* Convert from real to complex */
+  for(i=0; i < S->fftLen ; i++)
+  {
+    pTmp[2*i] = pSrc[i];
+    pTmp[2*i+1] = 0.0f16;
+  }
+  arm_cfft_f16(&(S->cfft),pTmp,0,1);
+#else
+  /* Default RFFT based implementation */
+  arm_rfft_fast_f16(&(S->rfft),pSrc,pTmp,0);
+  /* Unpack real values */
+  pTmp[S->fftLen]=pTmp[1];
+  pTmp[S->fftLen+1]=0.0f16;
+  pTmp[1]=0.0f;
+#endif
+  arm_cmplx_mag_f16(pTmp,pSrc,S->fftLen);
+
+  /* Apply MEL filters */
+  for(i=0; i<S->nbMelFilters; i++)
+  {
+      arm_dot_prod_f16(pSrc+S->filterPos[i],
+        coefs,
+        S->filterLengths[i],
+        &result);
+
+      coefs += S->filterLengths[i];
+
+      pTmp[i] = result;
+
+  }
+
+  /* Compute the log */
+  arm_offset_f16(pTmp,1.0e-4f16,pTmp,S->nbMelFilters);
+  arm_vlog_f16(pTmp,pTmp,S->nbMelFilters);
+
+  /* Multiply with the DCT matrix */
+
+  pDctMat.numRows=S->nbDctOutputs;
+  pDctMat.numCols=S->nbMelFilters;
+  pDctMat.pData=(float16_t*)S->dctCoefs;
+
+  arm_mat_vec_mult_f16(&pDctMat, pTmp, pDst);
+      
+
+}
+
+#endif /* defined(ARM_FLOAT16_SUPPORTED) */
+/**
+  @} end of MFCC group
+ */