shithub: libvpx

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Unify GOP structure layout setup

Refactor define_gf_group_structure() to unify the single-layer,
multi-layer ARF, and GF only GOP structure setup.

Change-Id: Iebbe9c3742fc58ae4e77b1072ebecb3ee7bd26b2

--- a/vp9/encoder/vp9_firstpass.c

+++ b/vp9/encoder/vp9_firstpass.c

@@ -2181,10 +2181,9 @@

   RATE_CONTROL *const rc = &cpi->rc;

   TWO_PASS *const twopass = &cpi->twopass;

   GF_GROUP *const gf_group = &twopass->gf_group;

-  int i;

   int frame_index = 0;

   int key_frame;

-  int normal_frames;

+  int layer_depth = 1;

   key_frame = cpi->common.frame_type == KEY_FRAME;

@@ -2191,6 +2190,7 @@

   gf_group->frame_start = cpi->common.current_video_frame;

   gf_group->frame_end = gf_group->frame_start + rc->baseline_gf_interval;

   gf_group->max_layer_depth = 0;

+  gf_group->allowed_max_layer_depth = 0;

   // For key frames the frame target rate is already set and it

   // is also the golden frame.

@@ -2204,51 +2204,24 @@

   if (rc->source_alt_ref_pending) {

     gf_group->update_type[frame_index] = ARF_UPDATE;

     gf_group->rf_level[frame_index] = GF_ARF_STD;

-    gf_group->layer_depth[frame_index] = 1;

+    gf_group->layer_depth[frame_index] = layer_depth;

     gf_group->arf_src_offset[frame_index] =

         (unsigned char)(rc->baseline_gf_interval - 1);

     gf_group->frame_gop_index[frame_index] = rc->baseline_gf_interval;

     gf_group->max_layer_depth = 1;

     ++frame_index;

-  }

-

-  if (rc->source_alt_ref_pending && cpi->multi_layer_arf) {

+    ++layer_depth;

     gf_group->allowed_max_layer_depth = cpi->oxcf.enable_auto_arf;

-    find_arf_order(cpi, gf_group, &frame_index, 2, 1, rc->baseline_gf_interval);

-

-    set_gf_overlay_frame_type(gf_group, frame_index,

-                              rc->source_alt_ref_pending);

-

-    gf_group->arf_src_offset[frame_index] = 0;

-    gf_group->frame_gop_index[frame_index] = rc->baseline_gf_interval;

-

-    gf_group->gf_group_size = frame_index;

-    return;

   }

-  normal_frames =

-      rc->baseline_gf_interval - (key_frame || rc->source_alt_ref_pending);

+  find_arf_order(cpi, gf_group, &frame_index, layer_depth, 1,

+                 rc->baseline_gf_interval);

-  for (i = 0; i < normal_frames; ++i) {

-    if (twopass->stats_in >= twopass->stats_in_end) break;

-

-    gf_group->update_type[frame_index] = LF_UPDATE;

-    gf_group->rf_level[frame_index] = INTER_NORMAL;

-    gf_group->arf_src_offset[frame_index] = 0;

-    gf_group->frame_gop_index[frame_index] = i + 1;

-    gf_group->layer_depth[frame_index] = MAX_ARF_LAYERS - 1;

-

-    ++frame_index;

-  }

-

-  // Note:

-  // We need to configure the frame at the end of the sequence + 1 that will be

-  // the start frame for the next group. Otherwise prior to the call to

-  // vp9_rc_get_second_pass_params() the data will be undefined.

   set_gf_overlay_frame_type(gf_group, frame_index, rc->source_alt_ref_pending);

   gf_group->arf_src_offset[frame_index] = 0;

   gf_group->frame_gop_index[frame_index] = rc->baseline_gf_interval;

+  // Set the frame ops number.

   gf_group->gf_group_size = frame_index;

 }