Mercurial > hg > svcore
changeset 535:3ccf48fb81d6
* make compression optional in editable dense 3d model, and some tweaks
author | Chris Cannam |
---|---|
date | Fri, 23 Jan 2009 14:00:29 +0000 (2009-01-23) |
parents | 6038cb6fcd30 |
children | beb51f558e9c |
files | data/fileio/CSVFileReader.cpp data/model/EditableDenseThreeDimensionalModel.cpp data/model/EditableDenseThreeDimensionalModel.h rdf/RDFImporter.cpp transform/FeatureExtractionModelTransformer.cpp |
diffstat | 5 files changed, 79 insertions(+), 26 deletions(-) [+] |
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--- a/data/fileio/CSVFileReader.cpp Fri Jan 23 13:31:51 2009 +0000 +++ b/data/fileio/CSVFileReader.cpp Fri Jan 23 14:00:29 2009 +0000 @@ -159,9 +159,11 @@ break; case CSVFormat::ThreeDimensionalModel: - model3 = new EditableDenseThreeDimensionalModel(sampleRate, - windowSize, - list.size()); + model3 = new EditableDenseThreeDimensionalModel + (sampleRate, + windowSize, + list.size(), + EditableDenseThreeDimensionalModel::NoCompression); model = model3; break; }
--- a/data/model/EditableDenseThreeDimensionalModel.cpp Fri Jan 23 13:31:51 2009 +0000 +++ b/data/model/EditableDenseThreeDimensionalModel.cpp Fri Jan 23 14:00:29 2009 +0000 @@ -28,10 +28,12 @@ EditableDenseThreeDimensionalModel::EditableDenseThreeDimensionalModel(size_t sampleRate, size_t resolution, size_t yBinCount, + CompressionType compression, bool notifyOnAdd) : m_sampleRate(sampleRate), m_resolution(resolution), m_yBinCount(yBinCount), + m_compression(compression), m_minimum(0.0), m_maximum(0.0), m_haveExtents(false), @@ -73,7 +75,7 @@ EditableDenseThreeDimensionalModel *model = new EditableDenseThreeDimensionalModel - (m_sampleRate, m_resolution, m_yBinCount); + (m_sampleRate, m_resolution, m_yBinCount, m_compression); model->m_minimum = m_minimum; model->m_maximum = m_maximum; @@ -152,11 +154,11 @@ EditableDenseThreeDimensionalModel::getValueAt(size_t index, size_t n) const { Column c = getColumn(index); - if (n < c.size()) return s.at(n); + if (n < c.size()) return c.at(n); return m_minimum; } -static int given = 0, stored = 0; +//static int given = 0, stored = 0; void EditableDenseThreeDimensionalModel::truncateAndStore(size_t index, @@ -166,19 +168,36 @@ //std::cout << "truncateAndStore(" << index << ", " << values.size() << ")" << std::endl; + // The default case is to store the entire column at m_data[index] + // and place 0 at m_trunc[index] to indicate that it has not been + // truncated. We only do clever stuff if one of the clever-stuff + // tests works out. + m_trunc[index] = 0; - if (index == 0 || values.size() != m_yBinCount) { - given += values.size(); - stored += values.size(); + if (index == 0 || + m_compression == NoCompression || + values.size() != m_yBinCount) { +// given += values.size(); +// stored += values.size(); m_data[index] = values; return; } - static int maxdist = 120; + // Maximum distance between a column and the one we refer to as + // the source of its truncated values. Limited by having to fit + // in a signed char, but in any case small values are usually + // better + static int maxdist = 6; - bool known = false; - bool top = false; + bool known = false; // do we know whether to truncate at top or bottom? + bool top = false; // if we do know, will we truncate at top? + // If the previous column is not truncated, then it is the only + // candidate for comparison. If it is truncated, then the column + // that it refers to is the only candidate. Either way, we only + // have one possible column to compare against here, and we are + // being careful to ensure it is not a truncated one (to avoid + // doing more work recursively when uncompressing). int tdist = 1; int ptrunc = m_trunc[index-1]; if (ptrunc < 0) { @@ -198,12 +217,14 @@ int bcount = 0, tcount = 0; if (!known || !top) { + // count how many identical values there are at the bottom for (int i = 0; i < h; ++i) { if (values.at(i) == p.at(i)) ++bcount; else break; } } if (!known || top) { + // count how many identical values there are at the top for (int i = h; i > 0; --i) { if (values.at(i-1) == p.at(i-1)) ++tcount; else break; @@ -211,41 +232,41 @@ } if (!known) top = (tcount > bcount); - int limit = h / 4; + int limit = h / 4; // don't bother unless we have at least this many if ((top ? tcount : bcount) > limit) { if (!top) { + // create a new column with h - bcount values from bcount up Column tcol(h - bcount); - given += values.size(); - stored += h - bcount; +// given += values.size(); +// stored += h - bcount; for (int i = bcount; i < h; ++i) { tcol[i - bcount] = values.at(i); } m_data[index] = tcol; m_trunc[index] = -tdist; - //std::cout << "bottom " << bcount << " as col at " << -tdist << std::endl; return; } else { + // create a new column with h - tcount values from 0 up Column tcol(h - tcount); - given += values.size(); - stored += h - tcount; +// given += values.size(); +// stored += h - tcount; for (int i = 0; i < h - tcount; ++i) { tcol[i] = values.at(i); } m_data[index] = tcol; m_trunc[index] = tdist; - //std::cout << "top " << tcount << " as col at " << -tdist << std::endl; return; } } } - given += values.size(); - stored += values.size(); - +// given += values.size(); +// stored += values.size(); // std::cout << "given: " << given << ", stored: " << stored << " (" // << ((float(stored) / float(given)) * 100.f) << "%)" << std::endl; + // default case if nothing wacky worked out m_data[index] = values; return; } @@ -253,6 +274,8 @@ EditableDenseThreeDimensionalModel::Column EditableDenseThreeDimensionalModel::expandAndRetrieve(size_t index) const { + // See comment above m_trunc declaration in header + assert(index < m_data.size()); Column c = m_data.at(index); if (index == 0) {
--- a/data/model/EditableDenseThreeDimensionalModel.h Fri Jan 23 13:31:51 2009 +0000 +++ b/data/model/EditableDenseThreeDimensionalModel.h Fri Jan 23 14:00:29 2009 +0000 @@ -25,9 +25,25 @@ Q_OBJECT public: + + // EditableDenseThreeDimensionalModel supports a basic compression + // method that reduces the size of multirate data (e.g. wavelet + // transform outputs) that are stored as plain 3d grids by about + // 60% or thereabouts. However, it can only be used for models + // whose columns are set in order from 0 and never subsequently + // changed. If the model is going to be actually edited, it must + // have NoCompression. + + enum CompressionType + { + NoCompression, + BasicMultirateCompression + }; + EditableDenseThreeDimensionalModel(size_t sampleRate, size_t resolution, size_t yBinCount, + CompressionType compression, bool notifyOnAdd = true); virtual bool isOK() const; @@ -125,7 +141,15 @@ typedef QVector<Column> ValueMatrix; ValueMatrix m_data; - std::vector<signed char> m_trunc; // +ve -> top is truncated, -ve -> bottom + // m_trunc is used for simple compression. If at least the top N + // elements of column x (for N = some proportion of the column + // height) are equal to those of an earlier column x', then + // m_trunc[x] will contain x-x' and column x will be truncated so + // as to remove the duplicate elements. If the equal elements are + // at the bottom, then m_trunc[x] will contain x'-x (a negative + // value). If m_trunc[x] is 0 then the whole of column x is + // stored. + std::vector<signed char> m_trunc; void truncateAndStore(size_t index, const Column & values); Column expandAndRetrieve(size_t index) const; @@ -134,6 +158,7 @@ size_t m_sampleRate; size_t m_resolution; size_t m_yBinCount; + CompressionType m_compression; float m_minimum; float m_maximum; bool m_haveExtents;
--- a/rdf/RDFImporter.cpp Fri Jan 23 13:31:51 2009 +0000 +++ b/rdf/RDFImporter.cpp Fri Jan 23 14:00:29 2009 +0000 @@ -342,8 +342,9 @@ } else { EditableDenseThreeDimensionalModel *m = - new EditableDenseThreeDimensionalModel(sampleRate, hopSize, - height, false); + new EditableDenseThreeDimensionalModel + (sampleRate, hopSize, height, + EditableDenseThreeDimensionalModel::NoCompression, false); EditableDenseThreeDimensionalModel::Column column;
--- a/transform/FeatureExtractionModelTransformer.cpp Fri Jan 23 13:31:51 2009 +0000 +++ b/transform/FeatureExtractionModelTransformer.cpp Fri Jan 23 14:00:29 2009 +0000 @@ -327,7 +327,9 @@ EditableDenseThreeDimensionalModel *model = new EditableDenseThreeDimensionalModel - (modelRate, modelResolution, binCount, false); + (modelRate, modelResolution, binCount, + EditableDenseThreeDimensionalModel::BasicMultirateCompression, + false); if (!m_descriptor->binNames.empty()) { std::vector<QString> names;