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Since we're now automatically falling back to using the command line
lame if we cannot load the library we can enable it on macOS as well.
When loading libmp3lame fails fall back to using the command line lame.
Avoids an unresolvable error when trying to create voice / talk files
Modernize code a bit.
Instead of calling the lame executable use libmp3lame directly. As result, this
simplifies the prerequisites for creating voice clips for Archos devices to
putting the library in the system's search path (Windows: put libmp3lame.dll in
the search path or the same folder RockboxUtility.exe is located in. Linux:
install the library using your systems package manager) and configuration.
This creates a notable encoding speedup on Windows (around factor 6 on my test
setup) and a small speedup on Linux (around factor 1.2).
The implemenatation currently has the following limitations:
- Only enabled on Windows and Linux. On OS X installing the correct dylib is a
bit nontrivial, so using the old command line based method is still in use
- The encoder parameters are currently hardcoded to use the same values the
build system uses.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31634 a1c6a512-1295-4272-9138-f99709370657
Create a separate source / header file for each supported encoder and the base
class and rename classes for better readability. This should also make it
easier adding new encoders.
Remove a few trailing spaces while at it.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31592 a1c6a512-1295-4272-9138-f99709370657