shithub: libvpx

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vp9-svc: On key frame update all reference slots for SVC.

Key frame updates the slots corresponding to the 3 references
last/golden/altref, but for SVC where more references buffers
may be in use, especialy for dynamically swithing up/down in layers,
make sure we should update all 8 slots on key frame.

Change-Id: Ifcca12608f420d5bae32b92794a3afe9b6369f77

--- a/vp9/encoder/vp9_encoder.c

+++ b/vp9/encoder/vp9_encoder.c

@@ -3023,9 +3023,17 @@

     // Keep track of frame index for each reference frame.

     SVC *const svc = &cpi->svc;

     if (cm->frame_type == KEY_FRAME) {

+      int i;

       svc->ref_frame_index[cpi->lst_fb_idx] = svc->current_superframe;

       svc->ref_frame_index[cpi->gld_fb_idx] = svc->current_superframe;

       svc->ref_frame_index[cpi->alt_fb_idx] = svc->current_superframe;

+      // On key frame update all reference frame slots.

+      for (i = 0; i < REF_FRAMES; i++) {

+        // LAST/GOLDEN/ALTREF is already updated above.

+        if (i != cpi->lst_fb_idx && i != cpi->gld_fb_idx &&

+            i != cpi->alt_fb_idx)

+          ref_cnt_fb(pool->frame_bufs, &cm->ref_frame_map[i], cm->new_fb_idx);

+      }

     } else {

       if (cpi->refresh_last_frame)

         svc->ref_frame_index[cpi->lst_fb_idx] = svc->current_superframe;