From 77a7c4c8fbc7a9fb59039c0f9469923dd651c009 Mon Sep 17 00:00:00 2001 From: Andy Wingo Date: Mon, 4 Jul 2005 14:02:46 +0000 Subject: examples/level/: Examples moved out of the source dir. Not updated tho. Original commit message from CVS: 2005-07-04 Andy Wingo * examples/level/: * examples/level/Makefile.am: * examples/level/README: * examples/level/demo.c: * examples/level/plot.c: Examples moved out of the source dir. Not updated tho. * configure.ac: Add level to the build. * gst/level/Makefile.am: * gst/level/gstlevel.h: * gst/level/gstlevel.c: Cleaned up, ported to 0.9. --- examples/level/README | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 examples/level/README (limited to 'examples/level/README') diff --git a/examples/level/README b/examples/level/README new file mode 100644 index 00000000..0ae84188 --- /dev/null +++ b/examples/level/README @@ -0,0 +1,39 @@ +level plugin by thomas + +this plugin signals: + - running time since last EOS/start + - channel + - RMS level + - peak level + - decaying peak level +over the given interval. + +This is useful for a VU meter display and for plotting out the signal graph. +The VU meter can either display RMS, or display immediate peak level and +have the falloff decaying peak level displayed as a line. + +The interval for signal emission, ttl of decay peak, and falloff of decay peak +can all be set. + +The element only takes unsigned data in; it could be extended to signed as +well, if separate fast chain functions are made that displaces the incoming +data to its midpoint (ie, 0,65535 should be mapped to -32768, 32767) + +There are two demo apps, apps and plot. apps will create some GTK sliders +to display the volume. plot will output data readable by gnuplot. + +Here is a sample plot script to plot output of the plot command that was +stored to plot.dat + +set xlabel "Seconds" +set ylabel "dB" +set yrange [-60:0] +plot 'plot.dat' using 1:2 title 'L RMS' with lines, \ + 'plot.dat' using 1:3 title 'L peak' with lines, \ + 'plot.dat' using 1:4 title 'L decay' with lines + +plot 'plot.dat' using 1:5 title 'R RMS' with lines, \ + 'plot.dat' using 1:6 title 'R peak' with lines, \ + 'plot.dat' using 1:7 title 'R decay' with lines + + -- cgit