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gstreamer/gst/level
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Benjamin Otte 1c7db040a3 tagging stuff and build fixes. In detail: 
Original commit message from CVS:
tagging stuff and build fixes. In detail:
- make gdk-pixbuf loader work when distchecking
- fix invalid syntax in ffmpeg Makefile. wildcards for EXTRA_DIST are not allowed. This broke builds where distdir != srcdir
- fix ffmpeg cvs grabbing when srcdir != distdir
- new id3tag plugin for id3 tag reading/writing (uses mad's libid3tag)
- mad and libid3tag require mad/libid3tag v0.15. Fixed configure to require that
- added ogg demuxer in ext/ogg. The demuxer does not handle events yet. Especially getting seeking right will require some effort or code copying from libvorbis.
- added raw vorbis detection to typefinding. oggdemux requires a typefind function to detect its contents.
- tags plugin in gst/tags. Provides API in <gst/tags/gsttagediting.h>. API includes tag matching GStreamer <=> ID3 and GStreamer <=> vorbis and writing/reading vorbiscomments or ID3v1 tags. Also included is a simple vorbiscomment reader/writer. Writing will not really work though until someone writes oggmux.
- various build fixes. Mostly missing (DIST)CLEANFILES.
- vorbisenc handles tag writing.

Now it's YOUR turn to fix and write more plugins that handle writing/reading of tags. :)
2003-11-24 04:08:47 +00:00
..
.gitignore tagging stuff and build fixes. In detail: 2003-11-24 04:08:47 +00:00
demo.c Remove all config.h includes from header files, add it to each source file and remove duplicate config.h includes fro... 2003-11-07 12:47:01 +00:00
filter.func gcc-2.95 fixage 2003-10-14 10:07:59 +00:00
gstlevel-marshal.list added second example with plotting fixed some aesthetics 2003-09-26 16:45:04 +00:00
gstlevel.c Fix segfault in #125471 by denying a state change to PLAYING when not inited. This is arguably not the right fix. 2003-11-19 03:46:21 +00:00
gstlevel.h Fix segfault in #125471 by denying a state change to PLAYING when not inited. This is arguably not the right fix. 2003-11-19 03:46:21 +00:00
Makefile.am tagging stuff and build fixes. In detail: 2003-11-24 04:08:47 +00:00
plot.c Remove all config.h includes from header files, add it to each source file and remove duplicate config.h includes fro... 2003-11-07 12:47:01 +00:00
README added second example with plotting fixed some aesthetics 2003-09-26 16:45:04 +00:00

README 

level plugin by thomas <thomas@apestaart.org>

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