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-rw-r--r--src/OutputMemory.cpp38
-rw-r--r--src/OutputMemory.h26
2 files changed, 63 insertions, 1 deletions
diff --git a/src/OutputMemory.cpp b/src/OutputMemory.cpp
index b47729c..4fb8bc1 100644
--- a/src/OutputMemory.cpp
+++ b/src/OutputMemory.cpp
@@ -1,6 +1,11 @@
/*
Copyright (C) 2007, 2008, 2009, 2010, 2011 Her Majesty the Queen in
Right of Canada (Communications Research Center Canada)
+
+ Copyright (C) 2014
+ Matthias P. Braendli, matthias.braendli@mpb.li
+
+ http://opendigitalradio.org
*/
/*
This file is part of ODR-DabMod.
@@ -24,6 +29,7 @@
#include <stdexcept>
#include <string.h>
+#include <math.h>
OutputMemory::OutputMemory(Buffer* dataOut)
@@ -32,11 +38,29 @@ OutputMemory::OutputMemory(Buffer* dataOut)
PDEBUG("OutputMemory::OutputMemory(%p) @ %p\n", dataOut, this);
setOutput(dataOut);
+
+#if OUTPUT_MEM_HISTOGRAM
+ myMax = 0.0f;
+ for (int i = 0; i < HIST_BINS; i++) {
+ myHistogram[i] = 0.0f;
+ }
+#endif
}
OutputMemory::~OutputMemory()
{
+#if OUTPUT_MEM_HISTOGRAM
+ fprintf(stderr, "* OutputMemory max %f\n", myMax);
+ fprintf(stderr, "* HISTOGRAM\n");
+
+ for (int i = 0; i < HIST_BINS; i++) {
+ fprintf(stderr, "** %5d - %5d: %ld\n",
+ i * HIST_BIN_SIZE,
+ (i+1) * HIST_BIN_SIZE - 1,
+ myHistogram[i]);
+ }
+#endif
PDEBUG("OutputMemory::~OutputMemory() @ %p\n", this);
}
@@ -56,5 +80,19 @@ int OutputMemory::process(Buffer* dataIn, Buffer* dataOut)
*myDataOut = *dataIn;
+#if OUTPUT_MEM_HISTOGRAM
+ const float* in = (const float*)dataIn->getData();
+ const size_t len = dataIn->getLength() / sizeof(float);
+
+ for (size_t i = 0; i < len; i++) {
+ float absval = fabsf(in[i]);
+ if (myMax < absval)
+ myMax = absval;
+
+ myHistogram[lrintf(absval) / HIST_BIN_SIZE]++;
+ }
+#endif
+
return myDataOut->getLength();
}
+
diff --git a/src/OutputMemory.h b/src/OutputMemory.h
index e687bb3..2dd49c5 100644
--- a/src/OutputMemory.h
+++ b/src/OutputMemory.h
@@ -1,6 +1,11 @@
/*
Copyright (C) 2007, 2008, 2009, 2010, 2011 Her Majesty the Queen in
Right of Canada (Communications Research Center Canada)
+
+ Copyright (C) 2014
+ Matthias P. Braendli, matthias.braendli@mpb.li
+
+ http://opendigitalradio.org
*/
/*
This file is part of ODR-DabMod.
@@ -26,6 +31,18 @@
# include "config.h"
#endif
+// This enables a rudimentary histogram functionality
+// It gets printed when the OutputMemory gets destroyed
+#define OUTPUT_MEM_HISTOGRAM 0
+
+#if OUTPUT_MEM_HISTOGRAM
+// The samples can go up to 100000 in value, make
+// sure that HIST_BINS * HIST_BIN_SIZE is large
+// enough !
+# define HIST_BINS 10
+# define HIST_BIN_SIZE 10000
+#endif
+
#include "ModOutput.h"
@@ -42,7 +59,14 @@ public:
protected:
Buffer* myDataOut;
-};
+#if OUTPUT_MEM_HISTOGRAM
+ // keep track of max value
+ float myMax;
+
+ long int myHistogram[HIST_BINS];
+#endif
+};
#endif // OUTPUT_MEMORY_H
+