im trying to improve performance of pulseview and therefore i need raw values from the libsigrok driver
my assumptions are * fixed point math / integer arithmetics is faster than float * multiplication is faster than division ** slow division can be replaced with fast bitshift * benefits of float are not needed in my app (analog oscilloscope with 8bit vertical resolution, linear data) * scale and offset calculations should be done only once in the whole data pipeline from sensor to GUI (raw to pixel in just one step) * smaller data types perform better (memory speed) * fourier transform can be optimized to use the raw datatypes, like "kiss fft" for 16bit fixed point FFT * in a GUI app like pulseview, the real values (voltages) are needed much less often than "pixel values" so the real values can be calculated on demand i found this wiki entry https://sigrok.org/wiki/High_precision_analog #Exact_representation_of_raw_data_and_metadata with this link https://gitorious.org/~mrnuke/sigrok/libsigrok/commits/prec "for details of implementation proposal" .. but the link is broken https --> SSL_ERROR_RX_RECORD_TOO_LONG http --> Not Found archive/cache --> not found other repos --> not found so my questions are: 1. whats the status of this work? 2. is there code i can reuse? (where is the "implementation proposal" by mrnuke?) 3. what are the challenges? (or, why is this not implemented yet? except being low priority) _______________________________________________ sigrok-devel mailing list sigrok-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sigrok-devel
