[FFmpeg-devel] [PATCH] lazily create threads in pthread.c

[Alexander Strange]

This patch changes pthread.c so that threads aren't created until  
execute() requests them.
This way, you can unconditionally call avcodec_thread_init() and not  
have unused threads lying around if they aren't used.

The same thing could be done with w32 and beosthread, but I haven't  
got a way to test them.
It could also save one worker thread by reusing the main thread,  
instead of sleeping it; I'll probably look at that later.

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