multithreaded/SMP motion estimation

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

1 files changed, 8 insertions, 3 deletions

diff --git a/libavcodec/mjpeg.c b/libavcodec/mjpeg.c
index 7aed3e28ac..30029d40c0 100644
--- a/libavcodec/mjpeg.c
+++ b/libavcodec/mjpeg.c
@@ -531,11 +531,16 @@ static void escape_FF(MpegEncContext *s, int start)
     }
 }
 
+void ff_mjpeg_stuffing(PutBitContext * pbc)
+{
+    int length;
+    length= (-put_bits_count(pbc))&7;
+    if(length) put_bits(pbc, length, (1<<length)-1);
+}
+
 void mjpeg_picture_trailer(MpegEncContext *s)
 {
-    int pad= (-put_bits_count(&s->pb))&7;
-    
-    put_bits(&s->pb, pad,0xFF>>(8-pad));
+    ff_mjpeg_stuffing(&s->pb);
     flush_put_bits(&s->pb);
 
     assert((s->header_bits&7)==0);