shithub: libvpx

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Multithreaded encoder, late sync loopfilter

Sync with loopfilter thread just at the beginning of next frame encoding.
This returns control to application faster and allows a better multicore scaling.
When PSNR packets are generated the final filtered frame is needed imediatly
so we cannot delay the sync.

Change-Id: I288d97b5e331d41d6f5bb49d97986fa12ac6f066

--- a/vp8/encoder/onyx_if.c

+++ b/vp8/encoder/onyx_if.c

@@ -3764,6 +3764,17 @@

             vp8_setup_key_frame(cpi);

         }

+#if CONFIG_MULTITHREAD

+        /*  wait for loopfilter thread done (for last picture)

+         *  don't do it for first frame, re-code and when PSNR is calculated

+         */

+        if (cpi->b_multi_threaded && cm->current_video_frame && (!Loop) &&

+                (!cpi->b_calculate_psnr))

+        {

+            sem_wait(&cpi->h_event_end_lpf);

+        }

+#endif

+

         // transform / motion compensation build reconstruction frame

         vp8_encode_frame(cpi);

@@ -4136,8 +4147,8 @@

     vp8_pack_bitstream(cpi, dest, size);

 #if CONFIG_MULTITHREAD

-    /* wait for loopfilter thread done */

-    if (cpi->b_multi_threaded)

+    /* if PSNR packets are generated we have to wait for the lpf */

+    if (cpi->b_multi_threaded && cpi->b_calculate_psnr)

     {

         sem_wait(&cpi->h_event_end_lpf);

     }