43 lines
1.4 KiB
Plaintext
43 lines
1.4 KiB
Plaintext
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GAW data model
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DATASET
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Central object for data storage is dataset.c dataset.h.
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User datas come, in general, as a form of a set of n variables, each variable
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carryng m rows of datas. The first one should be the independant variable
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and the other the dependant varaibles.
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A variable may have more than one column.
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A variable is stored in a structure WaveVar. Each pointer to WaveVar is stored
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in a GPtrArray hold by dataset itself.
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Gaw stores each column in a auto growing Glib GArray. The size of each entry
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in Garray is size of double.
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Each pointer to GArray is stored in a GPtrArray hold by dataset itself.
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GArray and and GPtrArray are Glib objects. They are auto growing, so rhe
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developper don't need to take care of the size of data. The only constraint is
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variable and data must feed in from column 0 to column n and so from row 0 to
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row m.
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Accessing the data in done with the function dataset_val_get()
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double dataset_val_get(WDataSet *wds, int row, int col )
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{
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GArray *ary = g_ptr_array_index( wds->datas, col );
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double *val = &g_array_index (ary, double, row );
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return *val;
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}
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WAVETABLE
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User data can have more than one dataset . so these datasets are stored in a
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GPtrArray hold by WaveTable.
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SPICESTREAM
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spicestream and its helper functions is an object to read data from file
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and store them in dataset. The input file may have different formats.
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SNDSTREAM
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sndstream is analog to spicestream but handle the sound card.
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