[TwoLAME-discuss] twolame encoder not thread safe

[Thomas W. <wol...@ms...>]

Hi,

The first bullet point in the twolame encoder feature list is "Fully thread-safe".
Unfortunately that's a false statement.
To prove it I wrote a simple Windows Forms Application that encodes 8 *.wav files via a thread pool.
I could however pinpoint the issue to redirecting the error output.
The bug occurs if there's no logging but doesn't if there is.

If you want to have a look yourself download the application's source code from here:
http://www.tomwolle.de/c++/src/twolame_encoder_mt_test.rar

Simply compile the x64 Debug configuration and start the process via the "Go" button.
The "LogOutput" checkbox allows for quickly switching between the 2 debugging states.
The resulting *.mp2 files will be located at the source file's location in the "source" folder.
If the bug occurs corresponding *.mp2 files will be missing and a "twolame.exe.stackdump" file will get created under the "...\bin\x64\Debug" directory.

Danke,
Thomas