tempo-plotter Changeset - 5e8115ecea3b · protofusion repositories

Changeset - 5e8115ecea3b

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longmem

0 3 0

Hasan Yavuz ÖZDERYA - 6 years ago 2020-01-29 15:27:34
hy@ozderya.net

make chunked buffer based on FrameBuffer

3 files changed with 35 insertions and 24 deletions:

src/chunkedbuffer.cpp

src/chunkedbuffer.h

tests/test.cpp

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src/chunkedbuffer.cpp

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 /*
-  Copyright © 2017 Hasan Yavuz Özderya
+  Copyright © 2020 Hasan Yavuz Özderya
   This file is part of serialplot.
   serialplot 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 3 of the License, or
@@ @@ -33,32 +33,32 @@ ChunkedBuffer::~ChunkedBuffer() @@
     for (auto chunk : chunks)
+    {
         delete chunk;
+    }
+}
-void ChunkedBuffer::addSamples(double* samples, size_t size)
+void ChunkedBuffer::addSamples(double* samples, unsigned n)
+{
     size_t i = 0;
-    while (i < size)
+    while (i < n)
+    {
         // select chunk to add data
         auto chunk = chunks.last();
         if (chunk->isFull())
+        {
             chunk = addNewChunk(); // create a new chunk
+        }
         // add data to chunk
-        size_t c = std::min(chunk->left(), (size - i));
+        size_t c = std::min(chunk->left(), (n - i));
         chunk->addSamples(&samples[i], c);
         i += c;
+    }
-    _size += size;
+    _size += n;
+}
 void ChunkedBuffer::clear()
+{
     // delete all chunks
     for (auto chunk : chunks)
@@ @@ -78,18 +78,18 @@ DataChunk* ChunkedBuffer::addNewChunk() @@
+{
     auto chunk = new DataChunk(_size, CHUNK_SIZE);
     chunks.append(chunk);
     return chunk;
+}
-size_t ChunkedBuffer::size() const
+unsigned ChunkedBuffer::size() const
+{
     return _size;
+}
-QRectF ChunkedBuffer::boundingRect() const
+Range ChunkedBuffer::limits() const
+{
     // TODO: it should be possible to cache boundingRect and only
     // update on 'addSamples' and when dropping chunks
     // find ymin and ymax
     double ymin = chunks.first()->min();
@@ @@ -97,15 +97,20 @@ QRectF ChunkedBuffer::boundingRect() con @@
     for (auto c : chunks)
+    {
         ymin = std::min(ymin, c->min());
         ymax = std::max(ymax, c->max());
+    }
-    return QRectF(0, ymax, _size, (ymax-ymin));
+    return {ymin, ymax};
+}
-double ChunkedBuffer::sample(size_t i) const
+double ChunkedBuffer::sample(unsigned i) const
+{
     int chunk_index = i / CHUNK_SIZE;
     int chunk_offset = i % CHUNK_SIZE;
     return chunks[chunk_index]->sample(chunk_offset);
+}
 void ChunkedBuffer::resize(unsigned n)
+{
     // TODO what to do for ChunkedBuffer::resize
+}

src/chunkedbuffer.h

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 /*
-  Copyright © 2017 Hasan Yavuz Özderya
+  Copyright © 2020 Hasan Yavuz Özderya
   This file is part of serialplot.
   serialplot 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 3 of the License, or
@@ @@ -22,28 +22,29 @@ @@
 #include <QPointF>
 #include <QRectF>
 #include <QVector>
 #include "datachunk.h"
 #include "framebuffer.h"
 #define CHUNK_SIZE (1024)
 class ChunkedBuffer
+class ChunkedBuffer : public WFrameBuffer
+{
 public:
     ChunkedBuffer();
     ~ChunkedBuffer();
     void addSamples(double* samples, size_t size);
     void clear();
     // QwtSeriesData related implementations
     size_t size() const;
     QRectF boundingRect() const;
     double sample(size_t i) const;
     // FrameBuffer related implementations
     virtual unsigned size() const;
     virtual double sample(unsigned i) const;
     virtual Range limits() const;
     virtual void resize(unsigned n);
     virtual void addSamples(double* samples, unsigned n);
     virtual void clear();
 private:
     size_t _size; // size of `data`
     size_t numChunks;
     QList<DataChunk*> chunks;

tests/test.cpp

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 /*
-  Copyright © 2018 Hasan Yavuz Özderya
+  Copyright © 2020 Hasan Yavuz Özderya
   This file is part of serialplot.
   serialplot 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 3 of the License, or
@@ @@ -451,43 +451,48 @@ TEST_CASE("filling data chunk", "[memory @@
 TEST_CASE("ChunkedBuffer created empty", "[memory]")
+{
     ChunkedBuffer b;
     REQUIRE(b.size() == 0);
     REQUIRE(b.boundingRect() == QRectF(0,0,0,0));
     REQUIRE(b.limits().start == 0);
     REQUIRE(b.limits().end == 0);
+}
 TEST_CASE("ChunkedBuffer adding data and clearing", "[memory]")
+{
     ChunkedBuffer b;
     // add some small data
     const int N = 10;
     double samples[N] = {1,2,3,4,5,6,7,8,9,10};
     b.addSamples(samples, N);
     REQUIRE(b.size() == N);
     REQUIRE(b.boundingRect() == QRectF(0,10,N,9));
     REQUIRE(b.limits().start == 1);
     REQUIRE(b.limits().end == 10);
     // add data to fill the chunk
     double samples2[CHUNK_SIZE-N] = {0};
     b.addSamples(samples2, CHUNK_SIZE-N);
     REQUIRE(b.size() == CHUNK_SIZE);
     REQUIRE(b.boundingRect() == QRectF(0,10,CHUNK_SIZE,10));
     REQUIRE(b.limits().start == 0);
     REQUIRE(b.limits().end == 10);
     // add data for second chunk
     b.addSamples(samples, N);
     REQUIRE(b.size() == CHUNK_SIZE+N);
     REQUIRE(b.boundingRect() == QRectF(0,10,CHUNK_SIZE+N,10));
     REQUIRE(b.limits().start == 0);
     REQUIRE(b.limits().end == 10);
     // add more data to make it 4 chunks
     double samples3[CHUNK_SIZE*3-N] = {0};
     b.addSamples(samples3, CHUNK_SIZE*3-N);
     REQUIRE(b.size() == CHUNK_SIZE*4);
     REQUIRE(b.boundingRect() == QRectF(0,10,CHUNK_SIZE*4,10));
     REQUIRE(b.limits().start == 0);
     REQUIRE(b.limits().end == 10);
     // clear
     b.clear();
     REQUIRE(b.size() == 0);
+}

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