The main operational difference is that for v4 effect onward, the
sound name will now be *TRACK*. This will not affect existing
effects since they use version number 3 or less.
This also provides the Nyquist effect with much more information about
the current processing:
Variable Property What
*AUDACITY* VERSION current Audacity version number
*SYSTEM-DIR* BASE Audacity install path
*SYSTEM-DIR* DATA Audacity data path
*SYSTEM-DIR* HELP Audacity help path
*SYSTEM-DIR* TEMP Audacity temp file path
*SYSTEM-DIR* PLUGIN Audacity search path for Nyquist plugins
*PROJECT* RATE current project sample rate
*PROJECT* TRACKS total number of tracks in the project
*PROJECT* WAVETRACKS number of wave tracks in the project
*PROJECT* LABELTRACKS number of label tracks in the project
*PROJECT* MIDITRACKS number of midi tracks in the project
*PROJECT* TIMETRACKS number of time tracks in the project
*SELECTION* START start time of current selection
*SELECTION* END end time of current selection
*SELECTION* TRACKS number of tracks in the current selection
*SELECTION* CHANNELS number of channels in the current selection
*SELECTION* LOW-HZ low frequency from spectrogram (if available, else nil)
*SELECTION* CENTER-HZ center frequence (calculated) (if available, else nil)
*SELECTION* HIGH-HZ high frequence from spectrogram (if available, else nil)
*SELECTION* BANDWIDTH bandwidth in octaves (calculated) (if available, else nil)
*SELECTION* PEAK-LEVEL peak amplitude for the current selection
*TRACK* INDEX 1-based index of track being processed
*TRACK* NAME name of track
*TRACK* TYPE type of track: wave, midi, label, time
*TRACK* VIEW track view: Waveform, Waveform (dB), etc.
*TRACK* CHANNELS number of channels in the track
*TRACK* START-TIME start time of track
*TRACK* END-TIME end time of track
*TRACK* GAIN track gain
*TRACK* PAN track pan
*TRACK* RATE sample rate of track
*TRACK* FORMAT sample format: 16 (int), 24 (int), 32.0 (float)
*TRACK* CLIPS list of start/end times for clips for each channel
This also now shows a new green 'play cursor' when ctrl is held down on wave track, and shift being held down is signalled by a cursor change to finger-pointer too.
I also accidentally enabled EXPERIMENTAL_MIDI_OUT. We may disable that in December for release. Leaving it in for now.
In r13510 I had neglected to build with all local libraries and some of
them needed attention.
So, I also took the opportunity to work out the locale directory and
how to keep it unmolested as well. As a result, all locales are rebuilt
as expected, but into the "build" directory.
As a bonus you may now test Audacity from the "build" directory and have
Nyquist plugins and message catalogs available (so you can test other
languages again without havint to install).
So, again:
mkdir buildme
cd buildme
../configure
make
./audacity
You may now do:
mkdir build
cd build
../configure
./audacity
And all but one directory will remain unmolested...no more object files
in "src".
And if you look carefully, you'll see that the newly built "audacity" is
copied to the top of the build tree...no more having to use "src/audacity"
to run.
You can of course still do the configure from the top and get all of the
objects strewn about the tree.
I still haven't figured out how to keep the locale directory from getting
soiled. I'm not really sure there's a way around it really.
These are mostly for getting it to build on Linux, but I've
also created new configs in Visual Studio to make it easier
to switch between wx2 and wx3.
For Linux, you have to tell configure where to find the wx3
version of the wx-config script and, since some distros build
wxWidgets v3 against GTK+ v3, you may also need to enable
gtk3 with something like:
./configure --enable-gtk3 WX_CONFIG=/usr/bin/wx-config-3.0
On Windows, I've added "wx3-Debug" and "wx3-Release" to the
existing "Debug" and "Release" configurations.
They depend on you having your WXWIN environment variable
pointing to your wx2 directory and a new WXWIN3 environment
variable pointing to your wx3 directory. For instance, I
have:
WXWIN=C:\Users\yam\Documents\wxWidgets-2.8.13
WXWIN3=C:\Users\yam\Documents\wxWidgets-3.0.2
Doing this allows you to switch freely among the 4 configurations
without having to get out of Visual Studio and monkey around with
the environment.
The project files will also add the location of the wxWidgets DLLs
to the PATH when running Audacity from within Visual Studio. They
add %WXWIN%\lib\vc_dll or %WXWIN3%\lib\vc_dll at the beginning
of the PATH variable as appropriate.
I expect that once we convert to wx3 we'll just drop back down to
the normal Debug and Release configurations, but this should make
switching between wx2 and wx3 much easier during the transition.
We can't go to 3.0.1 yet as there are still build issues on
Linux and OSX. You can get Windows to build, but there's
still some display issues.
These changes should work with wxWidgets 2.8.12 as well, so
we can take our time to get things working properly before
switching over.
