need it in *thread.c.

Originally committed as revision 22544 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 22324 to svn://svn.ffmpeg.org/ffmpeg/trunk

The various avcodec_thread_init() functions are updated to return
immediately after setting avctx->thread_count.  This allows -threads 0
to pass through to codecs.  It also simplifies the usage for apps
using libavcodec.

Originally committed as revision 21358 to svn://svn.ffmpeg.org/ffmpeg/trunk

processing with jobs > threads without wasting too much memory.
It also avoids needing a separate int array when the only additional data
the jobs needs is a single int running from 0 to count-1.

Originally committed as revision 20210 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 16684 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 16144 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 15804 to svn://svn.ffmpeg.org/ffmpeg/trunk

Necessary for systems that don't align by default to 16 bytes, required by some
SSE instructions.
Requires GCC >= 4.2.
Based on patch by Gaël Chardon.

Originally committed as revision 10106 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 9506 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 9484 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 8967 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 7256 to svn://svn.ffmpeg.org/ffmpeg/trunk

and fix GPL/LGPL version mismatches.

Originally committed as revision 6577 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 4842 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 4764 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 4749 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 3161 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 3138 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2842 to svn://svn.ffmpeg.org/ffmpeg/trunk

Originally committed as revision 2803 to svn://svn.ffmpeg.org/ffmpeg/trunk

multithreaded/SMP encoding for MPEG1/MPEG2/MPEG4/H263
all pthread specific code is in pthread.c
to try it, run configure --enable-pthreads and ffmpeg ... -threads <num>
the internal thread API is a simple AVCodecContext.execute() callback which executes a given function pointer with different arguments and returns after finishing all, that way no mutexes or other thread-mess is needed outside pthread.c

Originally committed as revision 2772 to svn://svn.ffmpeg.org/ffmpeg/trunk