shithub: libvpx

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Set refresh_alt_ref_frame on keyframe encode.

On a keyframe alt ref and golden are refreshed.  The flag was
not being set and so on the frame after a keyframe, motion
search would occur on the alt ref frame.  This is not necessary
because the alt ref frame identical to the last frame in this
scenario.

Handle corner case where a forward alt-ref frame is put
directly after a keyframe.

Change-Id: I9be4cf290d694f8cf2f9a31852014b5ccf1504d3

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

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

@@ -4583,7 +4583,7 @@

     }

     else

     {

-        if (cpi->oxcf.play_alternate && cpi->common.refresh_alt_ref_frame)

+        if (cpi->oxcf.play_alternate && cpi->common.refresh_alt_ref_frame && (cpi->common.frame_type != KEY_FRAME))

             // Update the alternate reference frame and stats as appropriate.

             update_alt_ref_frame_and_stats(cpi);

         else

--- a/vp8/encoder/ratectrl.c

+++ b/vp8/encoder/ratectrl.c

@@ -326,6 +326,7 @@

         cpi->frames_till_gf_update_due = cpi->goldfreq;

     cpi->common.refresh_golden_frame = TRUE;

+    cpi->common.refresh_alt_ref_frame = TRUE;

 }

 void vp8_calc_auto_iframe_target_size(VP8_COMP *cpi)

-- 

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