CMSIS-DSP: Add MFCC to SDFTools

Python and C++ nodes available.
New examples 5 and 6 are shwoing how to use MFCC in SDF in both cases.

SDFTools/.gitignore

@@ -9,4 +9,10 @@ examples/build/bin_example2
 examples/build/bin_dsp/
 examples/build/bin_example3/
 *.pyd
+examples/build/localcreate.bat
+examples/build/input_example3.txt
+examples/build/bin_example6/
+examples/build/input_example6.txt
+examples/build/output_example3.txt
+examples/build/output_example6.txt
 

SDFTools/README.md

@@ -173,3 +173,23 @@ Here is a list of the nodes supported by default. More can be easily added:
 - [Example 3 : Working example with CMSIS-DSP and FFT](documentation/example3.md)
 - [Example 4 : Same as example 3 but with the CMSIS-DSP Python wrapper](documentation/example4.md)
 
+Examples 5 and 6 are showing how to use the CMSIS-DSP MFCC with a synchronous data flow.
+
+## Building the examples
+
+The script `create.bat` or `create.sh` in folder `examples/build` must be changed to use the path to the root CMSIS-DSP folder.
+
+Then, those scripts can be used to create a make using cmake.
+
+After those steps, typing `make` will build the C examples.
+
+To run the first one for example you'll have to type (from `build` folder): `bin_example1\example1`
+
+For the python examples, you need to go to the example folder (for instance `example4`). In the folder, type `python main.py`.
+
+
+
+If the dataflow is changed for any Python example, from the corresponding example folder you'll have to type `python graph.py` to regenerate the schedule. And you'll have to type `dot -Tpdf -o test.pdf test.dot` in the Python examples to regenerate the graph picture.
+
+For the C++ examples, the make is taking care of regenerating the schedule and the dot graph when `graph.py` is edited.
+

SDFTools/documentation/example2.md

@@ -20,12 +20,14 @@ It is much more complex:
 - The node HALF representing a constant is introduced (constant arrays are also supported)
 - The two streams are added using a CMSIS-DSP function
 - Then we have a sliding buffer 
-- A block representing a MFCC
+- A block representing a MFCC (a fake MFCC)
 - Another sliding buffer
-- An a block representing TensorFlow Lite for Micro
+- An a block representing TensorFlow Lite for Micro (a fake TFLite node)
 
 Note that those blocks (MFCC, TFLite) are doing nothing in this example. It is just to illustrate a more complex example that someone may want to experiment with for keyword spotting.
 
+Examples 5 and 6 are showing how to use the CMSIS-DSP MFCC.
+
 The new features compared to `example1` are:
 
 - Delay

SDFTools/examples/CMakeLists.txt

@@ -47,3 +47,4 @@ add_subdirectory(${DSP}/Source bin_dsp)
 add_subdirectory(example1 bin_example1)
 add_subdirectory(example2 bin_example2)
 add_subdirectory(example3 bin_example3)
+add_subdirectory(example6 bin_example6)

SDFTools/examples/example2/graph.py

@@ -32,6 +32,7 @@ class StereoSource(GenericSource):
     def typeName(self):
         return "StereoSource"
 
+# This is a fake TFLite node just for illustration
 class TFLite(GenericSink):
     def __init__(self,name):
         GenericSink.__init__(self,name)
@@ -41,6 +42,8 @@ class TFLite(GenericSink):
     def typeName(self):
         return "TFLite"
 
+# This is a fake MFCC just to illustrate how it could be used in a graph.
+# For a real MFCC example, look at example5
 class MFCC(GenericNode):
     def __init__(self,name,inLength):
         GenericNode.__init__(self,name)

SDFTools/examples/example3/AppNodes.h

@@ -35,8 +35,8 @@ using namespace std;
 #include <cstdio>
 #include "arm_math.h"
 
-#include "FileSink.h"
-#include "FileSource.h"
+#include "host/FileSink.h"
+#include "host/FileSource.h"
 #include "CFFT.h"
 #include "ICFFT.h"
 

SDFTools/examples/example3/custom.h

@@ -3,8 +3,6 @@
 #define HALF 0.5
 extern const float32_t HANN[256];
 
-extern arm_cfft_instance_f32 CFFT1;
-extern arm_cfft_instance_f32 ICFFT1;
 
 
 #endif 

SDFTools/examples/example4/CMakeLists.txt

@@ -1,16 +0,0 @@
-cmake_minimum_required (VERSION 3.14)
-include(CMakePrintHelpers)
-
-project(Example3)
-
-
-add_executable(example3 main.cpp custom.cpp)
-
-sdf(example3)
-add_sdf_dir(example3)
-
-target_include_directories(example3 PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
-
-target_link_libraries(example3 PRIVATE CMSISDSP)
-
-file(COPY input_example3.txt DESTINATION ${CMAKE_BINARY_DIR})

SDFTools/examples/example4/appnodes.py

@@ -28,8 +28,8 @@
 from sdf.schedule.simu import *
 from custom import *
 
-from sdf.nodes.py.FileSink import *
-from sdf.nodes.py.FileSource import *
+from sdf.nodes.py.host.FileSink import *
+from sdf.nodes.py.host.FileSource import *
 from sdf.nodes.py.CFFT import *
 from sdf.nodes.py.ICFFT import *
 from sdf.nodes.py.ToComplex import *

SDFTools/examples/example5/appnodes.py

@@ -0,0 +1,45 @@
+###########################################
+# Project:      CMSIS DSP Library
+# Title:        appnodes.py
+# Description:  Application nodes for Example 4
+# 
+# $Date:        29 July 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.
+############################################
+from sdf.schedule.simu import *
+from custom import *
+
+# Host only nodes
+from sdf.nodes.py.host.NumpySink import *
+from sdf.nodes.py.host.WavSource import *
+
+# Embedded nodes
+from sdf.nodes.py.StereoToMono import *
+from sdf.nodes.py.MFCC import *
+
+
+
+
+
+
+
+

SDFTools/examples/example5/custom.py

@@ -0,0 +1,4 @@
+import numpy as np 
+
+
+

SDFTools/examples/example5/dynamic_image.py

@@ -0,0 +1,46 @@
+"""
+=================================================
+Animated image using a precomputed list of images
+=================================================
+
+"""
+
+import numpy as np
+import matplotlib.pyplot as plt
+import matplotlib.animation as animation
+
+fig, ax = plt.subplots()
+
+
+def f(x, y):
+    return np.sin(x) + np.cos(y)
+
+x = np.linspace(0, 2 * np.pi, 120)
+y = np.linspace(0, 2 * np.pi, 100).reshape(-1, 1)
+
+# ims is a list of lists, each row is a list of artists to draw in the
+# current frame; here we are just animating one artist, the image, in
+# each frame
+ims = []
+for i in range(60):
+    x += np.pi / 15.
+    y += np.pi / 20.
+    im = ax.imshow(f(x, y), animated=True)
+    if i == 0:
+        ax.imshow(f(x, y))  # show an initial one first
+    ims.append([im])
+
+ani = animation.ArtistAnimation(fig, ims, interval=50, blit=True,
+                                repeat_delay=1000)
+
+# To save the animation, use e.g.
+#
+# ani.save("movie.mp4")
+#
+# or
+#
+# writer = animation.FFMpegWriter(
+#     fps=15, metadata=dict(artist='Me'), bitrate=1800)
+# ani.save("movie.mp4", writer=writer)
+
+plt.show()

SDFTools/examples/example5/graph.py

@@ -0,0 +1,60 @@
+import sys
+import numpy as np 
+
+sys.path.append("../..")
+
+from sdf import *
+
+from sharedconfig import *
+
+
+
+q15Type = CType(Q15)
+
+### The feature computed by the graph is one second of MFCCs.
+### So the nbMFCCOutputs is computed from this and with the additional
+### assumption that it must be even.
+### Because the MFCC slising window is sliding by half a second
+### each time (half number of MFCCs)
+src=WavSource("src",NBCHANNELS*AUDIO_INTERRUPT_LENGTH)
+src.addLiteralArg("test_stereo.wav")
+
+toMono=StereoToMono("toMono",q15Type,AUDIO_INTERRUPT_LENGTH)
+
+slidingAudio=SlidingBuffer("audioWin",q15Type,FFTSize,AudioOverlap)
+slidingMFCC=SlidingBuffer("mfccWin",q15Type,numOfDctOutputs*nbMFCCOutputs,numOfDctOutputs*nbMFCCOutputs>>1)
+
+mfcc=MFCC("mfcc",q15Type,FFTSize,numOfDctOutputs)
+mfcc.addVariableArg("mfccConfig")
+
+sink=NumpySink("sink",q15Type,nbMFCCOutputs * numOfDctOutputs)
+sink.addVariableArg("dispbuf")
+
+g = Graph()
+
+g.connect(src.o, toMono.i)
+
+g.connect(toMono.o, slidingAudio.i)
+
+g.connect(slidingAudio.o, mfcc.i)
+
+g.connect(mfcc.o,slidingMFCC.i)
+g.connect(slidingMFCC.o,sink.i)
+
+print("Generate graphviz and code")
+
+
+
+sched = g.computeSchedule()
+print("Schedule length = %d" % sched.scheduleLength)
+print("Memory usage %d bytes" % sched.memory)
+#
+conf=Configuration()
+conf.debugLimit=12
+conf.pyOptionalArgs="mfccConfig,dispbuf"
+
+sched.pythoncode(".",config=conf)
+
+with open("test.dot","w") as f:
+    sched.graphviz(f)
+

SDFTools/examples/example5/main.py

@@ -0,0 +1,56 @@
+import sched as s 
+import matplotlib.pyplot as plt
+from matplotlib import cm
+import matplotlib.animation as animation
+
+import cmsisdsp as dsp
+import numpy as np
+import cmsisdsp.fixedpoint as f
+import cmsisdsp.mfcc as mfcc
+import scipy.signal as sig
+from cmsisdsp.datatype import F32,Q31,Q15
+from sharedconfig import *
+import cmsisdsp.datatype as dt
+
+mfccq15=dsp.arm_mfcc_instance_q15()
+
+windowQ15 = dt.convert(sig.hamming(FFTSize, sym=False),Q15)
+filtLen,filtPos,packedFiltersQ15 = mfcc.melFilterMatrix(Q15,freq_min, freq_high, numOfMelFilters,sample_rate,FFTSize)
+dctMatrixFiltersQ15 = mfcc.dctMatrix(Q15,numOfDctOutputs, numOfMelFilters)
+
+
+status=dsp.arm_mfcc_init_q15(mfccq15,FFTSize,numOfMelFilters,numOfDctOutputs,
+    dctMatrixFiltersQ15,
+    filtPos,filtLen,packedFiltersQ15,windowQ15)
+
+#DISPBUF = np.zeros(nbMFCCOutputs*numOfDctOutputs)
+DISPBUF=[]
+print("Start")
+
+nb,error = s.scheduler(mfccq15,DISPBUF)
+
+print("Nb sched = %d" % nb)
+
+
+fig, ax = plt.subplots()
+
+# The test signal is 5 second long
+# MFCC are slided by 0.5 second by the last window
+# Each sink entry is a one second of MFCC
+ims = []
+for i in range(10):
+    mfccdata = (1<<8)*f.Q15toF32(DISPBUF[i])
+    mfccdata=mfccdata.reshape((nbMFCCOutputs,numOfDctOutputs))
+    mfccdata= np.swapaxes(mfccdata, 0 ,1)
+    if i==0:
+        ax.imshow(mfccdata, vmin=-10, vmax=10,interpolation='nearest',cmap=cm.coolwarm ,origin='lower')
+    
+    im=ax.imshow(mfccdata, vmin=-10, vmax=10,interpolation='nearest', animated=True,cmap=cm.coolwarm ,origin='lower')
+    ims.append([im])
+
+ani = animation.ArtistAnimation(fig, ims, interval=500, blit=True,
+                                repeat_delay=500)
+
+#ani.save("mfcc.mp4")
+
+plt.show()

SDFTools/examples/example5/sched.py

@@ -0,0 +1,947 @@
+#
+# Generated with CMSIS-DSP SDF Scripts.
+# The generated code is not covered by CMSIS-DSP license.
+# 
+# The support classes and code is covered by CMSIS-DSP license.
+#
+
+import sys
+
+# To find SDF module
+sys.path.append("../..")
+
+import numpy as np
+import cmsisdsp as dsp
+from sdf.schedule.simu import *
+from appnodes import * 
+from custom import *
+
+DEBUGSCHED=False
+
+# 
+# FIFO buffers
+# 
+
+
+FIFOSIZE0=384
+buf0=np.zeros(FIFOSIZE0,dtype=np.int16)
+
+FIFOSIZE1=768
+buf1=np.zeros(FIFOSIZE1,dtype=np.int16)
+
+FIFOSIZE2=1024
+buf2=np.zeros(FIFOSIZE2,dtype=np.int16)
+
+FIFOSIZE3=377
+buf3=np.zeros(FIFOSIZE3,dtype=np.int16)
+
+FIFOSIZE4=754
+buf4=np.zeros(FIFOSIZE4,dtype=np.int16)
+
+
+def scheduler(mfccConfig,dispbuf):
+    sdfError=0
+    nbSchedule=0
+    debugCounter=12
+
+    #
+    #  Create FIFOs objects
+    #
+    fifo0=FIFO(FIFOSIZE0,buf0)
+    fifo1=FIFO(FIFOSIZE1,buf1)
+    fifo2=FIFO(FIFOSIZE2,buf2)
+    fifo3=FIFO(FIFOSIZE3,buf3)
+    fifo4=FIFO(FIFOSIZE4,buf4)
+
+    # 
+    #  Create node objects
+    #
+    audioWin = SlidingBuffer(1024,256,fifo1,fifo2);
+    mfcc = MFCC(1024,13,fifo2,fifo3,mfccConfig);
+    mfccWin = SlidingBuffer(754,377,fifo3,fifo4);
+    sink = NumpySink(754,fifo4,dispbuf);
+    src = WavSource(384,fifo0,"test_stereo.wav");
+    toMono = StereoToMono(384,192,fifo0,fifo1);
+
+    while((sdfError==0) and (debugCounter > 0)):
+       nbSchedule = nbSchedule + 1
+
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = src.run()
+       if sdfError < 0:
+          break
+       sdfError = toMono.run()
+       if sdfError < 0:
+          break
+       sdfError = audioWin.run()
+       if sdfError < 0:
+          break
+       sdfError = mfcc.run()
+       if sdfError < 0:
+          break
+       sdfError = mfccWin.run()
+       if sdfError < 0:
+          break
+       sdfError = sink.run()
+       if sdfError < 0:
+          break
+
+       debugCounter = debugCounter - 1 
+    return(nbSchedule,sdfError)

SDFTools/examples/example5/sharedconfig.py

@@ -0,0 +1,25 @@
+import sys
+import numpy as np 
+
+
+FS=16000
+NBCHANNELS=2 # stereo
+# You can try with 120
+AUDIO_INTERRUPT_LENGTH = 192
+
+# MFCC Description
+sample_rate = 16000
+FFTSize = 1024
+AudioOverlap = 256
+numOfDctOutputs = 13
+    
+freq_min = 64
+freq_high = sample_rate / 2
+numOfMelFilters = 20
+
+# NB MFCC Outputs to cover one second of signal with the window overlap
+nbMFCCOutputs = int(np.floor((sample_rate - FFTSize) / AudioOverlap))
+
+if nbMFCCOutputs%2 == 1:
+    nbMFCCOutputs = nbMFCCOutputs + 1 
+    

SDFTools/examples/example5/test.dot

@@ -0,0 +1,66 @@
+
+
+
+digraph structs {
+    node [shape=plaintext]
+    rankdir=LR
+    edge [arrowsize=0.5]
+    fontname="times"
+
+
+audioWin [label=<
+<TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0" CELLPADDING="4">
+  <TR>
+    <TD ALIGN="CENTER" PORT="i">audioWin<BR/>(SlidingBuffer)</TD>
+  </TR>
+</TABLE>>];
+
+mfcc [label=<
+<TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0" CELLPADDING="4">
+  <TR>
+    <TD ALIGN="CENTER" PORT="i">mfcc<BR/>(MFCC)</TD>
+  </TR>
+</TABLE>>];
+
+mfccWin [label=<
+<TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0" CELLPADDING="4">
+  <TR>
+    <TD ALIGN="CENTER" PORT="i">mfccWin<BR/>(SlidingBuffer)</TD>
+  </TR>
+</TABLE>>];
+
+sink [label=<
+<TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0" CELLPADDING="4">
+  <TR>
+    <TD ALIGN="CENTER" PORT="i">sink<BR/>(NumpySink)</TD>
+  </TR>
+</TABLE>>];
+
+src [label=<
+<TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0" CELLPADDING="4">
+  <TR>
+    <TD ALIGN="CENTER" PORT="i">src<BR/>(WavSource)</TD>
+  </TR>
+</TABLE>>];
+
+toMono [label=<
+<TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0" CELLPADDING="4">
+  <TR>
+    <TD ALIGN="CENTER" PORT="i">toMono<BR/>(StereoToMono)</TD>
+  </TR>
+</TABLE>>];
+
+
+
+src:i -> toMono:i [headlabel=<<FONT COLOR="blue" POINT-SIZE="12.0" >384</FONT>>,taillabel=<<FONT COLOR="blue" POINT-SIZE="12.0" >384</FONT>>,label="q15(384)"]
+
+toMono:i -> audioWin:i [headlabel=<<FONT COLOR="blue" POINT-SIZE="12.0" >768</FONT>>,taillabel=<<FONT COLOR="blue" POINT-SIZE="12.0" >192</FONT>>,label="q15(768)"]
+
+audioWin:i -> mfcc:i [headlabel=<<FONT COLOR="blue" POINT-SIZE="12.0" >1024</FONT>>,taillabel=<<FONT COLOR="blue" POINT-SIZE="12.0" >1024</FONT>>,label="q15(1024)"]
+
+mfcc:i -> mfccWin:i [headlabel=<<FONT COLOR="blue" POINT-SIZE="12.0" >377</FONT>>,taillabel=<<FONT COLOR="blue" POINT-SIZE="12.0" >13</FONT>>,label="q15(377)"]
+
+mfccWin:i -> sink:i [headlabel=<<FONT COLOR="blue" POINT-SIZE="12.0" >754</FONT>>,taillabel=<<FONT COLOR="blue" POINT-SIZE="12.0" >754</FONT>>,label="q15(754)"]
+
+
+}

SDFTools/examples/example6/AppNodes.h

@@ -0,0 +1,44 @@
+/* ----------------------------------------------------------------------
+ * Project:      CMSIS DSP Library
+ * Title:        AppNodes.h
+ * Description:  Application nodes for Example 6
+ *
+ * $Date:        29 July 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.
+ */
+#ifndef _APPNODES_H_
+#define _APPNODES_H_
+
+#include <iostream>
+#include <fstream>
+#include <string>
+using namespace std;
+#include <cstdio>
+#include "arm_math.h"
+
+#include "host/FileSink.h"
+#include "host/FileSource.h"
+#include "MFCC.h"
+
+
+
+#endif

SDFTools/examples/example6/CMakeLists.txt

@@ -0,0 +1,17 @@
+cmake_minimum_required (VERSION 3.14)
+include(CMakePrintHelpers)
+
+project(Example6)
+
+
+add_executable(example6 main.cpp mfccConfigData.c)
+
+sdf(example6)
+add_sdf_dir(example6)
+
+target_include_directories(example6 PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
+target_include_directories(example6 PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/generated)
+
+target_link_libraries(example6 PRIVATE CMSISDSP)
+
+file(COPY input_example6.txt DESTINATION ${CMAKE_BINARY_DIR})

SDFTools/examples/example6/custom.h

@@ -0,0 +1,4 @@
+#ifndef _CUSTOM_H_
+
+
+#endif 

SDFTools/examples/example6/generated/scheduler.cpp

@@ -0,0 +1,106 @@
+/*
+
+Generated with CMSIS-DSP SDF Scripts.
+The generated code is not covered by CMSIS-DSP license.
+
+The support classes and code is covered by CMSIS-DSP license.
+
+*/
+
+
+#include "arm_math.h"
+#include "custom.h"
+#include "GenericNodes.h"
+#include "AppNodes.h"
+#include "scheduler.h"
+
+/***********
+
+FIFO buffers
+
+************/
+#define FIFOSIZE0 256
+#define FIFOSIZE1 256
+#define FIFOSIZE2 13
+#define FIFOSIZE3 26
+
+#define BUFFERSIZE0 256
+float32_t buf0[BUFFERSIZE0]={0};
+
+#define BUFFERSIZE1 256
+float32_t buf1[BUFFERSIZE1]={0};
+
+#define BUFFERSIZE2 13
+float32_t buf2[BUFFERSIZE2]={0};
+
+#define BUFFERSIZE3 26
+float32_t buf3[BUFFERSIZE3]={0};
+
+
+uint32_t scheduler(int *error,arm_mfcc_instance_f32 *mfccConfig)
+{
+    int sdfError=0;
+    uint32_t nbSchedule=0;
+    int32_t debugCounter=1;
+
+    /*
+    Create FIFOs objects
+    */
+    FIFO<float32_t,FIFOSIZE0,0> fifo0(buf0);
+    FIFO<float32_t,FIFOSIZE1,1> fifo1(buf1);
+    FIFO<float32_t,FIFOSIZE2,1> fifo2(buf2);
+    FIFO<float32_t,FIFOSIZE3,0> fifo3(buf3);
+
+    /* 
+    Create node objects
+    */
+    SlidingBuffer<float32_t,256,128> audioWin(fifo0,fifo1);
+    MFCC<float32_t,256,float32_t,13> mfcc(fifo1,fifo2,mfccConfig);
+    SlidingBuffer<float32_t,26,13> mfccWin(fifo2,fifo3);
+    FileSink<float32_t,13> sink(fifo3,"output_example6.txt");
+    FileSource<float32_t,192> src(fifo0,"input_example6.txt");
+
+    while((sdfError==0) && (debugCounter > 0))
+    {
+
+       sdfError = src.run();
+       CHECKERROR;
+       sdfError = audioWin.run();
+       CHECKERROR;
+       sdfError = mfcc.run();
+       CHECKERROR;
+       sdfError = mfccWin.run();
+       CHECKERROR;
+       sdfError = sink.run();
+       CHECKERROR;
+       sdfError = sink.run();
+       CHECKERROR;
+       sdfError = src.run();
+       CHECKERROR;
+       sdfError = audioWin.run();
+       CHECKERROR;
+       sdfError = mfcc.run();
+       CHECKERROR;
+       sdfError = mfccWin.run();
+       CHECKERROR;
+       sdfError = sink.run();
+       CHECKERROR;
+       sdfError = sink.run();
+       CHECKERROR;
+       sdfError = audioWin.run();
+       CHECKERROR;
+       sdfError = mfcc.run();
+       CHECKERROR;
+       sdfError = mfccWin.run();
+       CHECKERROR;
+       sdfError = sink.run();
+       CHECKERROR;
+       sdfError = sink.run();
+       CHECKERROR;
+
+       debugCounter--;
+       nbSchedule++;
+    }
+    *error=sdfError;
+    return(nbSchedule);
+}

SDFTools/examples/example6/generated/scheduler.h

@@ -0,0 +1,25 @@
+/*
+
+Generated with CMSIS-DSP SDF Scripts.
+The generated code is not covered by CMSIS-DSP license.
+
+The support classes and code is covered by CMSIS-DSP license.
+
+*/
+
+#ifndef _SCHED_H_ 
+#define _SCHED_H_
+
+#ifdef   __cplusplus
+extern "C"
+{
+#endif
+
+extern uint32_t scheduler(int *error,arm_mfcc_instance_f32 *mfccConfig);
+
+#ifdef   __cplusplus
+}
+#endif
+
+#endif
+

SDFTools/examples/example6/graph.py

@@ -0,0 +1,57 @@
+import sys
+import numpy as np 
+
+sys.path.append("../..")
+
+from sdf import *
+
+from sharedconfig import *
+
+
+
+floatType = CType(F32)
+
+### The feature computed by the graph is one second of MFCCs.
+### So the nbMFCCOutputs is computed from this and with the additional
+### assumption that it must be even.
+### Because the MFCC slising window is sliding by half a second
+### each time (half number of MFCCs)
+src=FileSource("src",NBCHANNELS*AUDIO_INTERRUPT_LENGTH)
+src.addLiteralArg("input_example6.txt")
+
+
+slidingAudio=SlidingBuffer("audioWin",floatType,FFTSize,FFTSize>>1)
+slidingMFCC=SlidingBuffer("mfccWin",floatType,2*numOfDctOutputs,numOfDctOutputs)
+
+mfcc=MFCC("mfcc",floatType,FFTSize,numOfDctOutputs)
+mfcc.addVariableArg("mfccConfig")
+
+sink=FileSink("sink",numOfDctOutputs)
+sink.addLiteralArg("output_example6.txt")
+
+g = Graph()
+
+g.connect(src.o, slidingAudio.i)
+
+g.connect(slidingAudio.o, mfcc.i)
+
+g.connect(mfcc.o,slidingMFCC.i)
+g.connect(slidingMFCC.o,sink.i)
+
+print("Generate graphviz and code")
+
+
+
+sched = g.computeSchedule()
+print("Schedule length = %d" % sched.scheduleLength)
+print("Memory usage %d bytes" % sched.memory)
+#
+conf=Configuration()
+conf.debugLimit=1
+conf.cOptionalArgs="arm_mfcc_instance_f32 *mfccConfig"
+
+sched.ccode("generated",config=conf)
+
+with open("test.dot","w") as f:
+    sched.graphviz(f)
+

SDFTools/examples/example6/input_example6.txt

@@ -0,0 +1,256 @@
+0.65507051 
+-0.94647589 
+0.00627239 
+0.14151286 
+-0.10863318 
+-0.36370327
+0.05777126 
+-0.11915792 
+0.50183546 
+-0.31461335 
+0.66440771 
+0.05389963
+0.39690544 
+0.25424852 
+-0.17045277 
+0.09649268 
+0.87357385 
+-0.44666372
+-0.02637822 
+-0.10055151 
+-0.14610252 
+-0.05981251 
+-0.02999124 
+0.60923213
+0.10530095 
+0.35684248 
+0.21845946 
+0.47845017 
+-0.60206979 
+0.25186908
+-0.27410056 
+-0.07080467 
+-0.05109539 
+-0.2666572 
+0.25483105 
+-0.86459185
+0.07733397 
+-0.58535444 
+0.06230904 
+-0.04161475 
+-0.17467296 
+0.77721125
+-0.01728161 
+-0.32141218 
+0.36674466 
+-0.17932843 
+0.78486115 
+0.12469579
+-0.94796877 
+0.05536031 
+0.32627676 
+0.46628512 
+-0.02585836 
+-0.51439834
+0.21387904 
+0.16319442 
+-0.01020818 
+-0.77161183 
+0.07754634 
+-0.24970455
+0.2368003 
+0.35167963 
+0.14620137 
+-0.02415204 
+0.91086167 
+-0.02434647
+-0.3968239 
+-0.04703925 
+-0.43905103 
+-0.34834965 
+0.33728158 
+0.15138992
+-0.43218885 
+0.26619718 
+0.07177906 
+0.33393581 
+-0.50306915 
+-0.63101084
+-0.08128395 
+-0.06569788 
+0.84232797 
+-0.32436751 
+0.02528537 
+-0.3498329
+0.41859931 
+0.07794887 
+0.4571989 
+0.24290963 
+0.08437417 
+-0.01371585
+-0.00103008 
+0.83978697 
+-0.29001237 
+0.14438743 
+0.11943318 
+-0.25576402
+0.25151083 
+0.07886626 
+0.11565781 
+-0.01582203 
+0.1310246 
+-0.5553611
+-0.37950665 
+0.44179691 
+0.08460877 
+0.30646419 
+0.48927934 
+-0.21240309
+0.36844264 
+0.49686615 
+-0.81617664 
+0.52221472 
+-0.05188992 
+-0.03929655
+-0.47674501 
+-0.54506781 
+0.30711148 
+0.10049337 
+-0.47549213 
+0.59106713
+-0.62276051 
+-0.35182917 
+0.14612027 
+0.56142168 
+-0.01053732 
+0.35782179
+-0.27220781 
+-0.03672346 
+-0.11282222 
+0.3364912 
+-0.22352515 
+-0.04245287
+0.56968605 
+-0.14023724 
+-0.82982905 
+0.00860008 
+0.37920345 
+-0.53749318
+-0.12761215 
+0.08567603 
+0.47020765 
+-0.28794812 
+-0.33888971 
+0.01850441
+0.66848233 
+-0.26532759 
+-0.20777571 
+-0.68342729 
+-0.41498696 
+0.00593224
+0.02229368 
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+-0.1106449 
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+-0.14343857 
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+-0.06264758 
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+-0.22252155
+0.28621689 
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+-0.34694027 
+-0.01625718 
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+-0.28022716 
+-0.02506168 
+-0.10276881 
+0.31733924 
+0.02787068 
+-0.09824124
+0.45147797 
+0.14451518 
+0.17996395 
+-0.70594978 
+-0.92943177 
+0.13649282
+-0.5938426 
+0.50289928 
+0.19635269 
+0.16811504 
+0.05803999 
+0.0037204
+0.13847419 
+0.30568038 
+0.3700732 
+0.21257548 
+-0.31151753 
+-0.28836886
+0.68743932 
+-0.11084429 
+-0.4673766 
+0.16637754 
+-0.38992572 
+0.16505578
+-0.07499844 
+0.04226538 
+-0.11042177 
+0.0704542 
+-0.632819 
+-0.54898472
+0.26498649 
+-0.59380386 
+0.93387213 
+0.06526726 
+-0.23223558 
+0.07941394
+0.14325166 
+0.26914661 
+0.00925575 
+-0.34282161 
+-0.51418231 
+-0.12011075
+-0.26676314 
+-0.09999028 
+0.03027513 
+0.22846503 
+-0.08930338 
+-0.1867156
+0.66297846 
+0.32220769 
+-0.06015469 
+0.04034043 
+0.09595597 
+-1.
+-0.42933352 
+0.25069376 
+-0.26030918 
+-0.28511861 
+-0.19931228 
+0.24408572
+-0.3231952 
+0.45688981 
+-0.07354078 
+0.25669449 
+-0.44202722 
+0.11928406
+-0.32826109 
+0.52660984 
+0.03067858 
+0.11095242 
+0.19933679 
+0.03042371
+-0.34768682 
+0.09108447 
+0.61234556 
+0.1854931 
+0.19680502 
+0.27617564
+0.33381827 
+-0.47358967 
+0.28714328 
+-0.27495982

SDFTools/examples/example6/main.cpp

@@ -0,0 +1,23 @@
+#include <cstdio>
+#include <cstdint>
+#include "arm_math.h"
+#include "scheduler.h"
+#include "mfccConfigData.h"
+
+static arm_mfcc_instance_f32 mfcc;
+
+int main(int argc, char const *argv[])
+{
+    int error;
+    printf("Start\n");
+
+    arm_mfcc_init_f32(&mfcc,
+                    256,20,13,mfcc_dct_coefs_config1_f32,
+                    mfcc_filter_pos_config1_f32,mfcc_filter_len_config1_f32,
+                    mfcc_filter_coefs_config1_f32,
+                    mfcc_window_coefs_config1_f32);
+
+    uint32_t nb = scheduler(&error,&mfcc);
+    printf("Nb = %d\n",nb);
+    return 0;
+}

SDFTools/examples/example6/mfccConfigData.c

@@ -0,0 +1,105 @@
+#include "mfccConfigData.h"
+
+
+const float32_t mfcc_dct_coefs_config1_f32[NB_MFCC_DCT_COEFS_CONFIG1_F32]={
+0.316228f,0.316228f,0.316228f,0.316228f,0.316228f,0.316228f,0.316228f,0.316228f,0.316228f,0.316228f,
+0.316228f,0.316228f,0.316228f,0.316228f,0.316228f,0.316228f,0.316228f,0.316228f,0.316228f,0.316228f,
+0.315253f,0.307490f,0.292156f,0.269628f,0.240461f,0.205374f,0.165229f,0.121015f,0.073822f,0.024811f,
+-0.024811f,-0.073822f,-0.121015f,-0.165229f,-0.205374f,-0.240461f,-0.269628f,-0.292156f,-0.307490f,-0.315253f,
+0.312334f,0.281761f,0.223607f,0.143564f,0.049469f,-0.049469f,-0.143564f,-0.223607f,-0.281761f,-0.312334f,
+-0.312334f,-0.281761f,-0.223607f,-0.143564f,-0.049469f,0.049469f,0.143564f,0.223607f,0.281761f,0.312334f,
+0.307490f,0.240461f,0.121015f,-0.024811f,-0.165229f,-0.269628f,-0.315253f,-0.292156f,-0.205374f,-0.073822f,
+0.073822f,0.205374f,0.292156f,0.315253f,0.269628f,0.165229f,0.024811f,-0.121015f,-0.240461f,-0.307490f,
+0.300750f,0.185874f,0.000000f,-0.185874f,-0.300750f,-0.300750f,-0.185874f,-0.000000f,0.185874f,0.300750f,
+0.300750f,0.185874f,0.000000f,-0.185874f,-0.300750f,-0.300750f,-0.185874f,-0.000000f,0.185874f,0.300750f,
+0.292156f,0.121015f,-0.121015f,-0.292156f,-0.292156f,-0.121015f,0.121015f,0.292156f,0.292156f,0.121015f,
+-0.121015f,-0.292156f,-0.292156f,-0.121015f,0.121015f,0.292156f,0.292156f,0.121015f,-0.121015f,-0.292156f,
+0.281761f,0.049469f,-0.223607f,-0.312334f,-0.143564f,0.143564f,0.312334f,0.223607f,-0.049469f,-0.281761f,
+-0.281761f,-0.049469f,0.223607f,0.312334f,0.143564f,-0.143564f,-0.312334f,-0.223607f,0.049469f,0.281761f,
+0.269628f,-0.024811f,-0.292156f,-0.240461f,0.073822f,0.307490f,0.205374f,-0.121015f,-0.315253f,-0.165229f,
+0.165229f,0.315253f,0.121015f,-0.205374f,-0.307490f,-0.073822f,0.240461f,0.292156f,0.024811f,-0.269628f,
+0.255834f,-0.097720f,-0.316228f,-0.097720f,0.255834f,0.255834f,-0.097720f,-0.316228f,-0.097720f,0.255834f,
+0.255834f,-0.097720f,-0.316228f,-0.097720f,0.255834f,0.255834f,-0.097720f,-0.316228f,-0.097720f,0.255834f,
+0.240461f,-0.165229f,-0.292156f,0.073822f,0.315253f,0.024811f,-0.307490f,-0.121015f,0.269628f,0.205374f,
+-0.205374f,-0.269628f,0.121015f,0.307490f,-0.024811f,-0.315253f,-0.073822f,0.292156f,0.165229f,-0.240461f,
+0.223607f,-0.223607f,-0.223607f,0.223607f,0.223607f,-0.223607f,-0.223607f,0.223607f,0.223607f,-0.223607f,
+-0.223607f,0.223607f,0.223607f,-0.223607f,-0.223607f,0.223607f,0.223607f,-0.223607f,-0.223607f,0.223607f,
+0.205374f,-0.269628f,-0.121015f,0.307490f,0.024811f,-0.315253f,0.073822f,0.292156f,-0.165229f,-0.240461f,
+0.240461f,0.165229f,-0.292156f,-0.073822f,0.315253f,-0.024811f,-0.307490f,0.121015f,0.269628f,-0.205374f,
+0.185874f,-0.300750f,-0.000000f,0.300750f,-0.185874f,-0.185874f,0.300750f,0.000000f,-0.300750f,0.185874f,
+0.185874f,-0.300750f,-0.000000f,0.300750f,-0.185874f,-0.185874f,0.300750f,-0.000000f,-0.300750f,0.185874f,
+};
+
+
+
+
+const float32_t mfcc_window_coefs_config1_f32[NB_MFCC_WIN_COEFS_CONFIG1_F32]={
+0.080000f,0.080139f,0.080554f,0.081246f,0.082215f,0.083459f,0.084979f,0.086772f,0.088839f,0.091177f,
+0.093786f,0.096663f,0.099807f,0.103217f,0.106890f,0.110823f,0.115015f,0.119464f,0.124165f,0.129117f,
+0.134316f,0.139760f,0.145445f,0.151367f,0.157524f,0.163911f,0.170525f,0.177361f,0.184415f,0.191684f,
+0.199162f,0.206846f,0.214731f,0.222811f,0.231083f,0.239540f,0.248179f,0.256993f,0.265978f,0.275128f,
+0.284438f,0.293901f,0.303513f,0.313267f,0.323157f,0.333179f,0.343325f,0.353589f,0.363966f,0.374448f,
+0.385031f,0.395706f,0.406469f,0.417312f,0.428229f,0.439213f,0.450258f,0.461358f,0.472504f,0.483691f,
+0.494912f,0.506160f,0.517429f,0.528711f,0.540000f,0.551289f,0.562571f,0.573840f,0.585088f,0.596309f,
+0.607496f,0.618642f,0.629742f,0.640787f,0.651771f,0.662688f,0.673531f,0.684294f,0.694969f,0.705552f,
+0.716034f,0.726411f,0.736675f,0.746821f,0.756842f,0.766733f,0.776487f,0.786099f,0.795562f,0.804872f,
+0.814022f,0.823007f,0.831821f,0.840460f,0.848917f,0.857189f,0.865269f,0.873154f,0.880838f,0.888316f,
+0.895585f,0.902639f,0.909475f,0.916089f,0.922476f,0.928633f,0.934555f,0.940240f,0.945684f,0.950883f,
+0.955835f,0.960536f,0.964985f,0.969177f,0.973110f,0.976783f,0.980193f,0.983337f,0.986214f,0.988823f,
+0.991161f,0.993228f,0.995021f,0.996541f,0.997785f,0.998754f,0.999446f,0.999861f,1.000000f,0.999861f,
+0.999446f,0.998754f,0.997785f,0.996541f,0.995021f,0.993228f,0.991161f,0.988823f,0.986214f,0.983337f,
+0.980193f,0.976783f,0.973110f,0.969177f,0.964985f,0.960536f,0.955835f,0.950883f,0.945684f,0.940240f,
+0.934555f,0.928633f,0.922476f,0.916089f,0.909475f,0.902639f,0.895585f,0.888316f,0.880838f,0.873154f,
+0.865269f,0.857189f,0.848917f,0.840460f,0.831821f,0.823007f,0.814022f,0.804872f,0.795562f,0.786099f,
+0.776487f,0.766733f,0.756842f,0.746821f,0.736675f,0.726411f,0.716034f,0.705552f,0.694969f,0.684294f,
+0.673531f,0.662688f,0.651771f,0.640787f,0.629742f,0.618642f,0.607496f,0.596309f,0.585088f,0.573840f,
+0.562571f,0.551289f,0.540000f,0.528711f,0.517429f,0.506160f,0.494912f,0.483691f,0.472504f,0.461358f,
+0.450258f,0.439213f,0.428229f,0.417312f,0.406469f,0.395706f,0.385031f,0.374448f,0.363966f,0.353589f,
+0.343325f,0.333179f,0.323157f,0.313267f,0.303513f,0.293901f,0.284438f,0.275128f,0.265978f,0.256993f,
+0.248179f,0.239540f,0.231083f,0.222811f,0.214731f,0.206846f,0.199162f,0.191684f,0.184415f,0.177361f,
+0.170525f,0.163911f,0.157524f,0.151367f,0.145445f,0.139760f,0.134316f,0.129117f,0.124165f,0.119464f,
+0.115015f,0.110823f,0.106890f,0.103217f,0.099807f,0.096663f,0.093786f,0.091177f,0.088839f,0.086772f,
+0.084979f,0.083459f,0.082215f,0.081246f,0.080554f,0.080139f,};
+
+
+
+const uint32_t mfcc_filter_pos_config1_f32[NB_MFCC_NB_FILTER_CONFIG1_F32]={
+2,3,5,7,9,11,14,17,20,24,
+28,33,38,44,51,59,67,77,88,100,
+};
+const uint32_t mfcc_filter_len_config1_f32[NB_MFCC_NB_FILTER_CONFIG1_F32]={
+3,4,4,4,5,6,6,7,8,9,
+10,11,13,15,16,18,21,23,25,28,
+};
+
+
+
+
+const float32_t mfcc_filter_coefs_config1_f32[NB_MFCC_FILTER_COEFS_CONFIG1_F32]={
+0.663153f,0.706417f,0.118907f,0.293583f,0.881093f,0.568845f,0.051741f,0.431155f,0.948259f,0.563868f,
+0.102097f,0.436132f,0.897903f,0.663777f,0.246640f,0.336223f,0.753360f,0.848733f,0.468360f,0.104042f,
+0.151267f,0.531640f,0.895958f,0.754478f,0.418519f,0.095146f,0.245522f,0.581481f,0.904854f,0.783449f,
+0.482615f,0.191913f,0.216551f,0.517385f,0.808087f,0.910681f,0.638322f,0.374294f,0.118101f,0.089319f,
+0.361678f,0.625706f,0.881899f,0.869293f,0.627454f,0.392207f,0.163200f,0.130707f,0.372546f,0.607793f,
+0.836800f,0.940111f,0.722642f,0.510517f,0.303479f,0.101291f,0.059889f,0.277358f,0.489483f,0.696521f,
+0.898709f,0.903729f,0.710588f,0.521674f,0.336804f,0.155811f,0.096271f,0.289412f,0.478326f,0.663196f,
+0.844189f,0.978535f,0.804826f,0.634543f,0.467554f,0.303734f,0.142965f,0.021465f,0.195174f,0.365457f,
+0.532446f,0.696266f,0.857035f,0.985135f,0.830139f,0.677876f,0.528253f,0.381178f,0.236568f,0.094340f,
+0.014865f,0.169861f,0.322124f,0.471747f,0.618822f,0.763432f,0.905660f,0.954417f,0.816725f,0.681196f,
+0.547761f,0.416357f,0.286924f,0.159402f,0.033737f,0.045583f,0.183275f,0.318804f,0.452239f,0.583643f,
+0.713076f,0.840598f,0.966263f,0.909875f,0.787764f,0.667357f,0.548606f,0.431467f,0.315895f,0.201850f,
+0.089293f,0.090125f,0.212236f,0.332643f,0.451394f,0.568533f,0.684105f,0.798150f,0.910707f,0.978184f,
+0.868486f,0.760166f,0.653187f,0.547518f,0.443127f,0.339983f,0.238056f,0.137319f,0.037744f,0.021816f,
+0.131514f,0.239834f,0.346813f,0.452482f,0.556873f,0.660017f,0.761944f,0.862681f,0.962256f,0.939305f,
+0.841975f,0.745730f,0.650547f,0.556401f,0.463272f,0.371136f,0.279973f,0.189762f,0.100485f,0.012121f,
+0.060695f,0.158025f,0.254270f,0.349453f,0.443599f,0.536728f,0.628864f,0.720027f,0.810238f,0.899515f,
+0.987879f,0.924653f,0.838062f,0.752330f,0.667442f,0.583381f,0.500130f,0.417674f,0.335998f,0.255088f,
+0.174929f,0.095508f,0.016810f,0.075347f,0.161938f,0.247670f,0.332558f,0.416619f,0.499870f,0.582326f,
+0.664002f,0.744912f,0.825071f,0.904492f,0.983190f,0.938824f,0.861535f,0.784933f,0.709004f,0.633737f,
+0.559120f,0.485144f,0.411795f,0.339065f,0.266942f,0.195416f,0.124479f,0.054119f,0.061176f,0.138465f,
+0.215067f,0.290996f,0.366263f,0.440880f,0.514856f,0.588205f,0.660935f,0.733058f,0.804583f,0.875521f,
+0.945881f,0.984329f,0.915098f,0.846418f,0.778279f,0.710675f,0.643596f,0.577034f,0.510981f,0.445430f,
+0.380372f,0.315802f,0.251710f,0.188091f,0.124938f,0.062243f,};
+
+
+

SDFTools/examples/example6/mfccConfigData.h

@@ -0,0 +1,61 @@
+#ifndef _MFCC_DATA_H_
+#define _MFCC_DATA_H_ 
+
+#include "arm_math_types.h"
+
+
+#ifdef   __cplusplus
+extern "C"
+{
+#endif
+
+
+/*****
+
+ DCT COEFFICIENTS FOR THE MFCC
+
+*****/
+
+
+#define NB_MFCC_DCT_COEFS_CONFIG1_F32 260
+extern const float32_t mfcc_dct_coefs_config1_f32[NB_MFCC_DCT_COEFS_CONFIG1_F32];
+
+
+
+/*****
+
+ WINDOW COEFFICIENTS
+
+*****/
+
+
+#define NB_MFCC_WIN_COEFS_CONFIG1_F32 256
+extern const float32_t mfcc_window_coefs_config1_f32[NB_MFCC_WIN_COEFS_CONFIG1_F32];
+
+
+
+/*****
+
+ MEL FILTER COEFFICIENTS FOR THE MFCC
+
+*****/
+
+#define NB_MFCC_NB_FILTER_CONFIG1_F32 20
+extern const uint32_t mfcc_filter_pos_config1_f32[NB_MFCC_NB_FILTER_CONFIG1_F32];
+extern const uint32_t mfcc_filter_len_config1_f32[NB_MFCC_NB_FILTER_CONFIG1_F32];
+
+
+
+
+
+#define NB_MFCC_FILTER_COEFS_CONFIG1_F32 236
+extern const float32_t mfcc_filter_coefs_config1_f32[NB_MFCC_FILTER_COEFS_CONFIG1_F32];
+
+
+
+#ifdef   __cplusplus
+}
+#endif
+
+#endif
+

SDFTools/examples/example6/mfccconfig.yaml

@@ -0,0 +1,20 @@
+dct:
+  config1_f32: 
+    melFilters: 20 
+    dctOutputs: 13
+    type: "f32"
+
+melfilter:
+  config1_f32 : 
+    fftlength: 256 
+    fmin: 64 
+    fmax: 8000 
+    samplingRate : 16000 
+    melFilters: 20 
+    type: "f32"  
+
+window:
+  config1_f32:
+    fftlength: 256 
+    type: "f32"  
+    win: "hamming"

SDFTools/examples/example6/sharedconfig.py

@@ -0,0 +1,25 @@
+import sys
+import numpy as np 
+
+
+FS=16000
+NBCHANNELS=1 # stereo
+# You can try with 120
+AUDIO_INTERRUPT_LENGTH = 192
+
+# MFCC Description
+sample_rate = 16000
+FFTSize = 256
+numOfDctOutputs = 13
+    
+freq_min = 64
+freq_high = sample_rate / 2
+numOfMelFilters = 20
+
+# NB MFCC Outputs to cover one second of signal with the window overlap
+nbMFCCOutputs = int(np.floor(sample_rate / (FFTSize >> 1)))
+
+if nbMFCCOutputs%2 == 1:
+    nbMFCCOutputs = nbMFCCOutputs + 1 
+    
+print(nbMFCCOutputs)

SDFTools/examples/example6/test.dot

@@ -0,0 +1,57 @@
+
+
+
+digraph structs {
+    node [shape=plaintext]
+    rankdir=LR
+    edge [arrowsize=0.5]
+    fontname="times"
+
+
+audioWin [label=<
+<TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0" CELLPADDING="4">
+  <TR>
+    <TD ALIGN="CENTER" PORT="i">audioWin<BR/>(SlidingBuffer)</TD>
+  </TR>
+</TABLE>>];
+
+mfcc [label=<
+<TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0" CELLPADDING="4">
+  <TR>
+    <TD ALIGN="CENTER" PORT="i">mfcc<BR/>(MFCC)</TD>
+  </TR>
+</TABLE>>];
+
+mfccWin [label=<
+<TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0" CELLPADDING="4">
+  <TR>
+    <TD ALIGN="CENTER" PORT="i">mfccWin<BR/>(SlidingBuffer)</TD>
+  </TR>
+</TABLE>>];
+
+sink [label=<
+<TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0" CELLPADDING="4">
+  <TR>
+    <TD ALIGN="CENTER" PORT="i">sink<BR/>(FileSink)</TD>
+  </TR>
+</TABLE>>];
+
+src [label=<
+<TABLE BORDER="0" CELLBORDER="1" CELLSPACING="0" CELLPADDING="4">
+  <TR>
+    <TD ALIGN="CENTER" PORT="i">src<BR/>(FileSource)</TD>
+  </TR>
+</TABLE>>];
+
+
+
+src:i -> audioWin:i [headlabel=<<FONT COLOR="blue" POINT-SIZE="12.0" >128</FONT>>,taillabel=<<FONT COLOR="blue" POINT-SIZE="12.0" >192</FONT>>,label="f32(256)"]
+
+audioWin:i -> mfcc:i [headlabel=<<FONT COLOR="blue" POINT-SIZE="12.0" >256</FONT>>,taillabel=<<FONT COLOR="blue" POINT-SIZE="12.0" >256</FONT>>,label="f32(256)"]
+
+mfcc:i -> mfccWin:i [headlabel=<<FONT COLOR="blue" POINT-SIZE="12.0" >13</FONT>>,taillabel=<<FONT COLOR="blue" POINT-SIZE="12.0" >13</FONT>>,label="f32(13)"]
+
+mfccWin:i -> sink:i [headlabel=<<FONT COLOR="blue" POINT-SIZE="12.0" >13</FONT>>,taillabel=<<FONT COLOR="blue" POINT-SIZE="12.0" >26</FONT>>,label="f32(26)"]
+
+
+}

SDFTools/sdf/nodes/cpp/CFFT.h

@@ -57,6 +57,33 @@ public:
 
 };
 
+#if defined(ARM_FLOAT16_SUPPORTED)
+/*
+
+The CMSIS-DSP CFFT F32
+
+*/
+template<int inputSize>
+class CFFT<float16_t,inputSize,float16_t,inputSize>: public GenericNode<float16_t,inputSize,float16_t,inputSize>
+{
+public:
+    CFFT(FIFOBase<float16_t> &src,FIFOBase<float16_t> &dst):GenericNode<float16_t,inputSize,float16_t,inputSize>(src,dst){
+         arm_status status;
+         status=arm_cfft_init_f16(&sfft,inputSize>>1);
+    };
+
+    int run(){
+        float16_t *a=this->getReadBuffer();
+        float16_t *b=this->getWriteBuffer();
+        memcpy((void*)b,(void*)a,inputSize*sizeof(float16_t));
+        arm_cfft_f16(&sfft,b,0,1);
+        return(0);
+    };
+
+    arm_cfft_instance_f16 sfft;
+
+};
+#endif
 /*
 
 The CMSIS-DSP CFFT Q15

SDFTools/sdf/nodes/cpp/ICFFT.h

@@ -57,6 +57,34 @@ public:
 
 };
 
+#if defined(ARM_FLOAT16_SUPPORTED)
+/*
+
+The CMSIS-DSP ICFFT F32
+
+*/
+template<int inputSize>
+class ICFFT<float16_t,inputSize,float16_t,inputSize>: public GenericNode<float16_t,inputSize,float16_t,inputSize>
+{
+public:
+    ICFFT(FIFOBase<float16_t> &src,FIFOBase<float16_t> &dst):GenericNode<float16_t,inputSize,float16_t,inputSize>(src,dst){
+         arm_status status;
+         status=arm_cfft_init_f16(&sifft,inputSize>>1);
+    };
+
+    int run(){
+        float16_t *a=this->getReadBuffer();
+        float16_t *b=this->getWriteBuffer();
+        memcpy((void*)b,(void*)a,inputSize*sizeof(float16_t));
+        arm_cfft_f16(&sifft,b,1,1);
+        return(0);
+    };
+
+    arm_cfft_instance_f16 sifft;
+
+};
+#endif
+
 /*
 
 The CMSIS-DSP ICFFT Q15

SDFTools/sdf/nodes/cpp/MFCC.h

@@ -0,0 +1,154 @@
+/* ----------------------------------------------------------------------
+ * Project:      CMSIS DSP Library
+ * Title:        MFCC.h
+ * Description:  Node for CMSIS-DSP MFCC
+ *
+ * $Date:        06 October 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.
+ */
+#ifndef _MFCC_H_ 
+#define _MFCC_H_
+
+#include <vector>
+
+template<typename IN, int inputSize,typename OUT,int outputSize>
+class MFCC;
+
+/*
+
+The MFCC configuration data has to be generated with the script DSP/Scripts/GenMFCCDataForCPP.py.
+It is using a yaml file to describe the configuration
+
+*/
+
+/*
+
+The CMSIS-DSP MFCC F32
+
+*/
+template<int inputSize,int outputSize>
+class MFCC<float32_t,inputSize,float32_t,outputSize>: public GenericNode<float32_t,inputSize,float32_t,outputSize>
+{
+public:
+    MFCC(FIFOBase<float32_t> &src,FIFOBase<float32_t> &dst,const arm_mfcc_instance_f32 *config):GenericNode<float32_t,inputSize,float32_t,outputSize>(src,dst){
+         mfccConfig = config;
+#if defined(ARM_MFCC_CFFT_BASED)
+         memory.resize(2*inputSize);
+#else
+         memory.resize(inputSize + 2);
+#endif
+    };
+
+    int run(){
+        float32_t *a=this->getReadBuffer();
+        float32_t *b=this->getWriteBuffer();
+        arm_mfcc_f32(mfccConfig,a,b,memory.data());
+        return(0);
+    };
+
+    const arm_mfcc_instance_f32 *mfccConfig;
+    std::vector<float32_t> memory;
+};
+
+#if defined(ARM_FLOAT16_SUPPORTED)
+/*
+
+The CMSIS-DSP MFCC F16
+
+*/
+template<int inputSize,int outputSize>
+class MFCC<float16_t,inputSize,float16_t,outputSize>: public GenericNode<float16_t,inputSize,float16_t,outputSize>
+{
+public:
+    MFCC(FIFOBase<float16_t> &src,FIFOBase<float16_t> &dst,const arm_mfcc_instance_f16 *config):GenericNode<float16_t,inputSize,float16_t,outputSize>(src,dst){
+         mfccConfig = config;
+#if defined(ARM_MFCC_CFFT_BASED)
+         memory.resize(2*inputSize);
+#else
+         memory.resize(inputSize + 2);
+#endif
+    };
+
+    int run(){
+        float16_t *a=this->getReadBuffer();
+        float16_t *b=this->getWriteBuffer();
+        arm_mfcc_f16(mfccConfig,a,b,memory.data());
+        return(0);
+    };
+
+    const arm_mfcc_instance_f16 *mfccConfig;
+    std::vector<float16_t> memory;
+};
+#endif 
+
+/*
+
+The CMSIS-DSP MFCC Q31
+
+*/
+template<int inputSize,int outputSize>
+class MFCC<q31_t,inputSize,q31_t,outputSize>: public GenericNode<q31_t,inputSize,q31_t,outputSize>
+{
+public:
+    MFCC(FIFOBase<q31_t> &src,FIFOBase<q31_t> &dst,const arm_mfcc_instance_q31 *config):GenericNode<q31_t,inputSize,q31_t,outputSize>(src,dst){
+         mfccConfig = config;
+         memory.resize(2*inputSize);
+    };
+
+    int run(){
+        q31_t *a=this->getReadBuffer();
+        q31_t *b=this->getWriteBuffer();
+        arm_mfcc_q31(mfccConfig,a,b,memory.data());
+        return(0);
+    };
+
+    const arm_mfcc_instance_q31 *mfccConfig;
+    std::vector<q31_t> memory;
+};
+
+/*
+
+The CMSIS-DSP MFCC Q15
+
+*/
+template<int inputSize,int outputSize>
+class MFCC<q15_t,inputSize,q15_t,outputSize>: public GenericNode<q15_t,inputSize,q15_t,outputSize>
+{
+public:
+    MFCC(FIFOBase<q15_t> &src,FIFOBase<q15_t> &dst,const arm_mfcc_instance_q15 *config):GenericNode<q15_t,inputSize,q15_t,outputSize>(src,dst){
+         mfccConfig = config;
+         memory.resize(2*inputSize);
+    };
+
+    int run(){
+        q15_t *a=this->getReadBuffer();
+        q15_t *b=this->getWriteBuffer();
+        arm_mfcc_q15(mfccConfig,a,b,memory.data());
+        return(0);
+    };
+
+    const arm_mfcc_instance_q15 *mfccConfig;
+    std::vector<q15_t> memory;
+};
+
+
+#endif

SDFTools/sdf/nodes/cpp/StereoToMono.h

@@ -26,15 +26,15 @@
  * limitations under the License.
  */
 
-#ifndef _STEREOTOMONOQ15_H_
-#define _STEREOTOMONOQ15_H_ 
+#ifndef _STEREOTOMONO_H_
+#define _STEREOTOMONO_H_ 
 
 
 template<typename IN, int inputSize,typename OUT,int outputSize>
-class StereoToMonoQ15;
+class StereoToMono;
 
 template<int inputSize,int outputSize>
-class StereoToMonoQ15<q15_t,inputSize,q15_t,outputSize>: public GenericNode<q15_t,inputSize,q15_t,outputSize>
+class StereoToMono<q15_t,inputSize,q15_t,outputSize>: public GenericNode<q15_t,inputSize,q15_t,outputSize>
 {
 public:
     StereoToMonoQ15(FIFOBase<q15_t> &src,FIFOBase<q15_t> &dst):
@@ -53,4 +53,44 @@ public:
 
 };
 
+template<int inputSize,int outputSize>
+class StereoToMono<q31_t,inputSize,q31_t,outputSize>: public GenericNode<q31_t,inputSize,q31_t,outputSize>
+{
+public:
+    StereoToMono(FIFOBase<q31_t> &src,FIFOBase<q31_t> &dst):
+    GenericNode<q31_t,inputSize,q31_t,outputSize>(src,dst){};
+
+   
+    int run(){
+        q31_t *a=this->getReadBuffer();
+        q31_t *b=this->getWriteBuffer();
+        for(int i = 0; i<outputSize; i++)
+        {
+           b[i] = (a[2*i]>>1) + (a[2*i+1]>>1);
+        }
+        return(0);
+    };
+
+};
+
+template<int inputSize,int outputSize>
+class StereoToMono<float32_t,inputSize,float32_t,outputSize>: public GenericNode<float32_t,inputSize,float32_t,outputSize>
+{
+public:
+    StereoToMono(FIFOBase<float32_t> &src,FIFOBase<float32_t> &dst):
+    GenericNode<float32_t,inputSize,float32_t,outputSize>(src,dst){};
+
+   
+    int run(){
+        float32_t *a=this->getReadBuffer();
+        float32_t *b=this->getWriteBuffer();
+        for(int i = 0; i<outputSize; i++)
+        {
+           b[i] = 0.5f * (a[2*i] + a[2*i+1]);
+        }
+        return(0);
+    };
+
+};
+
 #endif

SDFTools/sdf/nodes/py/CFFT.py

@@ -1,6 +1,6 @@
 ###########################################
 # Project:      CMSIS DSP Library
-# Title:        CFFTF32.py
+# Title:        CFFTF.py
 # Description:  Node for CMSIS-DSP cfft
 # 
 # $Date:        30 July 2021
@@ -30,7 +30,7 @@ import cmsisdsp as dsp
 
 
 
-# The CMSIS-DSP CFFT F32
+# The CMSIS-DSP CFFT
 class CFFT(GenericNode):
     def __init__(self,inputSize,outSize,fifoin,fifoout):
         GenericNode.__init__(self,inputSize,outSize,fifoin,fifoout)

SDFTools/sdf/nodes/py/ICFFT.py

@@ -1,6 +1,6 @@
 ###########################################
 # Project:      CMSIS DSP Library
-# Title:        ICFFTF32.py
+# Title:        ICFFT.py
 # Description:  Node for CMSIS-DSP icfft f32
 # 
 # $Date:        30 July 2021
@@ -28,7 +28,7 @@
 from sdf.schedule.simu import *
 import cmsisdsp as dsp 
 
-# CMSIS-DSP ICFFT F32
+# CMSIS-DSP ICFFT
 class ICFFT(GenericNode):
     def __init__(self,inputSize,outSize,fifoin,fifoout):
         GenericNode.__init__(self,inputSize,outSize,fifoin,fifoout)

SDFTools/sdf/nodes/py/MFCC.py

@@ -0,0 +1,52 @@
+###########################################
+# Project:      CMSIS DSP Library
+# Title:        MFCC.py
+# Description:  Node for CMSIS-DSP MFCC
+# 
+# $Date:        30 July 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.
+############################################
+from sdf.schedule.simu import *
+import cmsisdsp as dsp 
+
+
+
+# The CMSIS-DSP MFCC
+class MFCC(GenericNode):
+    def __init__(self,inputSize,outSize,fifoin,fifoout,mfccConfig):
+        GenericNode.__init__(self,inputSize,outSize,fifoin,fifoout)
+        self._config=mfccConfig
+        self._tmp=np.zeros(2*inputSize,dtype=np.int32)
+
+
+    def run(self):
+        a=self.getReadBuffer()
+        b=self.getWriteBuffer()
+        if self._src.type == np.dtype(np.float):
+           res=dsp.arm_mfcc_f32(self._config,a,self._tmp)
+           errorStatus = 0
+        if self._src.type == np.dtype(np.int32):
+           errorStatus,res=dsp.arm_mfcc_q31(self._config,a,self._tmp)
+        if self._src.type == np.dtype(np.int16):
+           errorStatus,res=dsp.arm_mfcc_q15(self._config,a,self._tmp)
+        b[:] = res[:]
+        return(errorStatus)

SDFTools/sdf/nodes/py/StereoToMono.py

@@ -29,15 +29,21 @@ from sdf.schedule.simu import *
 import numpy as np 
 import cmsisdsp as dsp
 
-class StereoToMonoQ15(GenericNode):
+class StereoToMono(GenericNode):
     def __init__(self,inputSize,outputSize,fifoin,fifoout):
         GenericNode.__init__(self,inputSize,outputSize,fifoin,fifoout)
+        if fifoin.type == np.dtype(np.float):
+            self._isFloat=True 
+        else:
+            self._isFloat=False
 
 
     def run(self):
         i=self.getReadBuffer()
         o=self.getWriteBuffer()
 
-        # Scaling to avoid saturation
+        if self._isFloat:
+           o[:] = 0.5 * (i[::2] + i[1::2])
+        else:
            o[:] = (i[::2]) // 2 + (i[1::2] // 2)
         return(0)

SDFTools/sdf/nodes/py/host/FileSink.py

@@ -40,10 +40,10 @@ class FileSink(GenericSink):
     def run(self):
         b=self.getReadBuffer()
         nextPos = self._bufPos + self._inputSize 
-        if (nextPos < self._buffer.size):
+        if (nextPos <= self._buffer.size):
             # Save output to buffer defined in custom.py 
             # and used to display result with matplotlib
-            self._buffer[self._bufPos:nextPos]=b
+            self._buffer[self._bufPos:self._inputSize ]=b[:]
             self._bufPos = nextPos
 
         for sample in b:

SDFTools/sdf/nodes/py/host/NumpySink.py

@@ -0,0 +1,46 @@
+###########################################
+# Project:      CMSIS DSP Library
+# Title:        NumpySink.py
+# Description:  Sink node for displaying a buffer in scipy
+# 
+# $Date:        06 August 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.
+############################################
+
+from sdf.schedule.simu import *
+
+# Add each new received buffer to a list of buffers
+class NumpySink(GenericSink):
+    def __init__(self,inputSize,fifoin,matplotlibBuffer):
+        GenericSink.__init__(self,inputSize,fifoin)
+        self._bufPos=0
+        self._buffer=matplotlibBuffer
+
+    def run(self):
+        b=self.getReadBuffer()
+        buf = np.zeros(self._inputSize)
+        buf[:] = b[:]
+        self._buffer.append(buf)
+       
+        return(0)
+
+    

SDFTools/sdf/nodes/py/host/WavSink.py

@@ -44,10 +44,10 @@ class WavSink(GenericSink):
     def run(self):
         b=self.getReadBuffer()
         nextPos = self._bufPos + self._inputSize 
-        if (nextPos < self._buffer.size):
+        if (nextPos <= self._buffer.size):
             # Save output to buffer defined in custom.py 
             # and used to display result with matplotlib
-            self._buffer[self._bufPos:nextPos]=b
+            self._buffer[self._bufPos:self._inputSize]=b[:]
             self._bufPos = nextPos
 
         for sample in b:

SDFTools/sdf/nodes/py/host/WavSource.py

@@ -30,11 +30,14 @@ import wave
 
 # It is assuming the input is a stereo file
 # It is not yet customizable in this version
+# Pad with zero when end of file is reached
 class WavSource(GenericSource):
     "Read a stereo wav with 16 bits encoding"
     def __init__(self,outputSize,fifoout,name):
         GenericSource.__init__(self,outputSize,fifoout)
         self._file=wave.open(name, 'rb')
+        #print(self._file.getnchannels())
+        #print(self._file.getnframes())
 
 
     def run(self):
@@ -42,13 +45,13 @@ class WavSource(GenericSource):
 
         # Stereo file so chunk must be divided by 2
         frame=np.frombuffer(self._file.readframes(self._outputSize//2),dtype=np.int16)
-
         if frame.size > 0:
            a[:frame.size] = frame
            a[frame.size:] = 0
            return(0)
         else:
-           return(-1)
+           a[:]=0
+           return(0)
 
     def __del__(self):
         self._file.close()

SDFTools/sdf/schedule/simu.py

@@ -141,7 +141,7 @@ class SlidingBuffer(GenericNode):
         a=self.getReadBuffer()
         b=self.getWriteBuffer()
         b[:self._overlap] = self._memory 
-        b[self._overlap:self._windowSize]=a 
+        b[self._overlap:self._windowSize]=a[:self._windowSize-self._overlap] 
         self._memory[:self._overlap] = a[self._windowSize-(self._overlap<<1):self._windowSize-self._overlap]
         
         return(0)

SDFTools/sdf/schedule/standard.py

@@ -104,6 +104,43 @@ class ToReal(GenericNode):
     def typeName(self):
         return "ToReal"
 
+
+class NullSink(GenericSink):
+    def __init__(self,name,theType,inLength):
+        GenericSink.__init__(self,name)
+        self.addInput("i",theType,inLength)
+
+    @property
+    def typeName(self):
+        return "NullSink"
+
+class StereoToMono(GenericNode):
+    def __init__(self,name,theType,outLength):
+        GenericNode.__init__(self,name)
+        self.addInput("i",theType,2*outLength)
+        self.addOutput("o",theType,outLength)
+
+    @property
+    def typeName(self):
+        return "StereoToMono"
+
+
+class MFCC(GenericNode):
+    def __init__(self,name,theType,inLength,outLength):
+        GenericNode.__init__(self,name)
+
+        self.addInput("i",theType,inLength)
+        self.addOutput("o",theType,outLength)
+
+    @property
+    def typeName(self):
+        return "MFCC"
+
+#############################
+#
+# Host only Nodes
+#
+
 class FileSource(GenericSource):
     def __init__(self,name,inLength):
         GenericSource.__init__(self,name)
@@ -124,29 +161,9 @@ class FileSink(GenericSink):
     def typeName(self):
         return "FileSink"
 
-class NullSink(GenericSink):
-    def __init__(self,name,theType,inLength):
-        GenericSink.__init__(self,name)
-        self.addInput("i",theType,inLength)
-
-    @property
-    def typeName(self):
-        return "NullSink"
-
-class StereoToMonoQ15(GenericNode):
-    def __init__(self,name,outLength):
-        GenericNode.__init__(self,name)
-        q15Type=CType(Q15)
-        self.addInput("i",q15Type,2*outLength)
-        self.addOutput("o",q15Type,outLength)
-
-    @property
-    def typeName(self):
-        return "StereoToMonoQ15"
-
 #############################
 #
-# Python only Nodes
+# Python and host only Nodes
 #
 
 
@@ -170,3 +187,12 @@ class WavSink(GenericSink):
     def typeName(self):
         return "WavSink"
 
+class NumpySink(GenericSink):
+    def __init__(self,name,theType,inLength):
+        GenericSink.__init__(self,name)
+        self.addInput("i",theType,inLength)
+
+    @property
+    def typeName(self):
+        return "NumpySink"
+

SDFTools/sdf/templates/code.py

@@ -41,7 +41,7 @@ def {{config.schedName}}({{optionalargs()}}):
     sdfError=0
     nbSchedule=0
 {% if config.debug %}
-    debugCounter={{config.debugLimit}};
+    debugCounter={{config.debugLimit}}
 {% endif %}
 
     #

Scripts/GenMFCCDataForCPP.py

@@ -45,7 +45,7 @@ parser = argparse.ArgumentParser(description='Generate MFCC Data for CPP')
 parser.add_argument('-n', nargs='?',type = str, default="mfccdata", help="mfcc file name")
 parser.add_argument('-d', nargs='?',type = str, default="Testing/Source/Tests", help="mfcc c file directory")
 parser.add_argument('-i', nargs='?',type = str, default="Testing/Include/Tests", help="mfcc h file directory")
-parser.add_argument('others', nargs=argparse.REMAINDER)
+parser.add_argument('others', help="yaml configuration file", nargs=argparse.REMAINDER)
 
 args = parser.parse_args()
 

Source/TransformFunctions/arm_mfcc_q15.c

@@ -69,13 +69,17 @@
   @return        none
 
   @par           Description
-                   The number of input samples if the FFT length used
+                   The number of input samples is the FFT length used
                    when initializing the instance data structure.
 
                    The temporary buffer has a 2*fft length.
 
                    The source buffer is modified by this function.
 
+                   The function may saturate. If the FFT length is too
+                   big and the number of MEL filters too small then the fixed
+                   point computations may saturate.
+
  */
 
 arm_status arm_mfcc_q15(

Source/TransformFunctions/arm_mfcc_q31.c

@@ -69,13 +69,17 @@
   @return        none
 
   @par           Description
-                   The number of input samples if the FFT length used
+                   The number of input samples is the FFT length used
                    when initializing the instance data structure.
 
                    The temporary buffer has a 2*fft length.
 
                    The source buffer is modified by this function.
 
+                   The function may saturate. If the FFT length is too
+                   big and the number of MEL filters too small then the fixed
+                   point computations may saturate.
+
  */