1 files changed, 1 insertions, 205 deletions

diff --git a/vp9/encoder/vp9_encoder.c b/vp9/encoder/vp9_encoder.c
index 35125caea..f300f7111 100644
--- a/vp9/encoder/vp9_encoder.c
+++ b/vp9/encoder/vp9_encoder.c
@@ -2977,207 +2977,6 @@ static int recode_loop_test(VP9_COMP *cpi, int high_limit, int low_limit, int q,
   return force_recode;
 }
 
-// This function is used to shift the virtual indices of last reference frames
-// as follows:
-// LAST_FRAME -> LAST2_FRAME -> LAST3_FRAME
-// when the LAST_FRAME is updated.
-static INLINE void shift_last_ref_frames(VP9_COMP *cpi) {
-  int ref_frame;
-  for (ref_frame = LAST_REF_FRAMES - 1; ref_frame > 0; --ref_frame) {
-    cpi->ref_fb_idx[ref_frame] = cpi->ref_fb_idx[ref_frame - 1];
-
-    // [0] is allocated to the current coded frame. The statistics for the
-    // reference frames start at [LAST_FRAME], i.e. [1].
-    if (!cpi->rc.is_src_frame_alt_ref) {
-      memcpy(cpi->interp_filter_selected[ref_frame + LAST_FRAME],
-             cpi->interp_filter_selected[ref_frame - 1 + LAST_FRAME],
-             sizeof(cpi->interp_filter_selected[ref_frame - 1 + LAST_FRAME]));
-    }
-  }
-}
-
-void update_multi_arf_ref_frames(VP9_COMP *cpi) {
-  VP9_COMMON *const cm = &cpi->common;
-  BufferPool *const pool = cm->buffer_pool;
-
-  // NOTE: Save the new show frame buffer index for --test-code=warn, i.e.,
-  //       for the purpose to verify no mismatch between encoder and decoder.
-  if (cm->show_frame) cpi->last_show_frame_buf_idx = cm->new_fb_idx;
-
-  // At this point the new frame has been encoded.
-  // If any buffer copy / swapping is signaled it should be done here.
-
-  if (cm->frame_type == KEY_FRAME) {
-    int ref_frame;
-    for (ref_frame = 0; ref_frame < REF_FRAMES; ++ref_frame) {
-      ref_cnt_fb(pool->frame_bufs,
-                 &cm->ref_frame_map[cpi->ref_fb_idx[ref_frame]],
-                 cm->new_fb_idx);
-    }
-    return;
-  }
-
-  if (vp9_preserve_existing_gf(cpi)) {
-    // We have decided to preserve the previously existing golden frame as our
-    // new ARF frame. However, in the short term in function
-    // av1_bitstream.c::get_refresh_mask() we left it in the GF slot and, if
-    // we're updating the GF with the current decoded frame, we save it to the
-    // ARF slot instead.
-    // We now have to update the ARF with the current frame and swap gld_fb_idx
-    // and alt_fb_idx so that, overall, we've stored the old GF in the new ARF
-    // slot and, if we're updating the GF, the current frame becomes the new GF.
-    int tmp;
-
-    ref_cnt_fb(pool->frame_bufs,
-               &cm->ref_frame_map[cpi->ref_fb_idx[ALTREF_FRAME - 1]],
-               cm->new_fb_idx);
-    tmp = cpi->ref_fb_idx[ALTREF_FRAME - 1];
-    cpi->ref_fb_idx[ALTREF_FRAME - 1] = cpi->ref_fb_idx[GOLDEN_FRAME - 1];
-    cpi->ref_fb_idx[GOLDEN_FRAME - 1] = tmp;
-
-    // We need to modify the mapping accordingly
-    cpi->arf_map[0] = cpi->ref_fb_idx[ALTREF_FRAME - 1];
-  } else if (cpi->rc.is_src_frame_ext_arf && cm->show_existing_frame) {
-    // Deal with the special case for showing existing internal ALTREF_FRAME
-    // Refresh the LAST_FRAME with the ALTREF_FRAME and retire the LAST3_FRAME
-    // by updating the virtual indices.
-    const GF_GROUP *const gf_group = &cpi->twopass.gf_group;
-    const int which_arf = gf_group->arf_ref_idx[gf_group->index];
-    int tmp;
-    assert(gf_group->update_type[gf_group->index] == INTNL_OVERLAY_UPDATE);
-
-    tmp = cpi->ref_fb_idx[LAST_REF_FRAMES - 1];
-    shift_last_ref_frames(cpi);
-
-    cpi->ref_fb_idx[LAST_FRAME - 1] = cpi->ref_fb_idx[ALTREF2_FRAME - 1];
-    cpi->ref_fb_idx[ALTREF2_FRAME - 1] = tmp;
-
-    // We need to modify the mapping accordingly
-    cpi->arf_map[which_arf] = cpi->ref_fb_idx[ALTREF2_FRAME - 1];
-
-    memcpy(cpi->interp_filter_selected[LAST_FRAME],
-           cpi->interp_filter_selected[ALTREF2_FRAME],
-           sizeof(cpi->interp_filter_selected[ALTREF2_FRAME]));
-  } else { /* For non key/golden frames */
-    // === ALTREF_FRAME ===
-    if (cpi->refresh_alt_ref_frame) {
-      int arf_idx = cpi->ref_fb_idx[ALTREF_FRAME - 1];
-      int which_arf = 0;
-      ref_cnt_fb(pool->frame_bufs, &cm->ref_frame_map[arf_idx], cm->new_fb_idx);
-
-      memcpy(cpi->interp_filter_selected[ALTREF_FRAME + which_arf],
-             cpi->interp_filter_selected[0],
-             sizeof(cpi->interp_filter_selected[0]));
-    }
-
-    // === GOLDEN_FRAME ===
-    if (cpi->refresh_golden_frame) {
-      ref_cnt_fb(pool->frame_bufs,
-                 &cm->ref_frame_map[cpi->ref_fb_idx[GOLDEN_FRAME - 1]],
-                 cm->new_fb_idx);
-
-      memcpy(cpi->interp_filter_selected[GOLDEN_FRAME],
-             cpi->interp_filter_selected[0],
-             sizeof(cpi->interp_filter_selected[0]));
-    }
-
-    // === BWDREF_FRAME ===
-    if (cpi->refresh_bwd_ref_frame) {
-      ref_cnt_fb(pool->frame_bufs,
-                 &cm->ref_frame_map[cpi->ref_fb_idx[BWDREF_FRAME - 1]],
-                 cm->new_fb_idx);
-
-      memcpy(cpi->interp_filter_selected[BWDREF_FRAME],
-             cpi->interp_filter_selected[0],
-             sizeof(cpi->interp_filter_selected[0]));
-    }
-
-    // === ALTREF2_FRAME ===
-    if (cpi->refresh_alt2_ref_frame) {
-      ref_cnt_fb(pool->frame_bufs,
-                 &cm->ref_frame_map[cpi->ref_fb_idx[ALTREF2_FRAME - 1]],
-                 cm->new_fb_idx);
-
-      memcpy(cpi->interp_filter_selected[ALTREF2_FRAME],
-             cpi->interp_filter_selected[0],
-             sizeof(cpi->interp_filter_selected[0]));
-    }
-  }
-
-  if (cpi->refresh_last_frame) {
-    // NOTE(zoeliu): We have two layers of mapping (1) from the per-frame
-    // reference to the reference frame buffer virtual index; and then (2) from
-    // the virtual index to the reference frame buffer physical index:
-    //
-    // LAST_FRAME,      ..., LAST3_FRAME,     ..., ALTREF_FRAME
-    //      |                     |                     |
-    //      v                     v                     v
-    // ref_fb_idx[0],   ..., ref_fb_idx[2],   ..., ref_fb_idx[ALTREF_FRAME-1]
-    //      |                     |                     |
-    //      v                     v                     v
-    // ref_frame_map[], ..., ref_frame_map[], ..., ref_frame_map[]
-    //
-    // When refresh_last_frame is set, it is intended to retire LAST3_FRAME,
-    // have the other 2 LAST reference frames shifted as follows:
-    // LAST_FRAME -> LAST2_FRAME -> LAST3_FRAME
-    // , and then have LAST_FRAME refreshed by the newly coded frame.
-    //
-    // To fulfill it, the decoder will be notified to execute following 2 steps:
-    //
-    // (a) To change ref_frame_map[] and have the virtual index of LAST3_FRAME
-    //     to point to the newly coded frame, i.e.
-    //     ref_frame_map[lst_fb_idexes[2]] => new_fb_idx;
-    //
-    // (b) To change the 1st layer mapping to have LAST_FRAME mapped to the
-    //     original virtual index of LAST3_FRAME and have the other mappings
-    //     shifted as follows:
-    // LAST_FRAME,      LAST2_FRAME,     LAST3_FRAME
-    //      |                |                |
-    //      v                v                v
-    // ref_fb_idx[2],   ref_fb_idx[0],   ref_fb_idx[1]
-    int tmp;
-
-    ref_cnt_fb(pool->frame_bufs,
-               &cm->ref_frame_map[cpi->ref_fb_idx[LAST_REF_FRAMES - 1]],
-               cm->new_fb_idx);
-
-    tmp = cpi->ref_fb_idx[LAST_REF_FRAMES - 1];
-
-    shift_last_ref_frames(cpi);
-    cpi->ref_fb_idx[0] = tmp;
-
-    assert(cm->show_existing_frame == 0);
-    memcpy(cpi->interp_filter_selected[LAST_FRAME],
-           cpi->interp_filter_selected[0],
-           sizeof(cpi->interp_filter_selected[0]));
-
-    if (cpi->rc.is_last_bipred_frame) {
-      // Refresh the LAST_FRAME with the BWDREF_FRAME and retire the
-      // LAST3_FRAME by updating the virtual indices.
-      //
-      // NOTE: The source frame for BWDREF does not have a holding position as
-      //       the OVERLAY frame for ALTREF's. Hence, to resolve the reference
-      //       virtual index reshuffling for BWDREF, the encoder always
-      //       specifies a LAST_BIPRED right before BWDREF and completes the
-      //       reshuffling job accordingly.
-      tmp = cpi->ref_fb_idx[LAST_REF_FRAMES - 1];
-
-      shift_last_ref_frames(cpi);
-      cpi->ref_fb_idx[0] = cpi->ref_fb_idx[BWDREF_FRAME - 1];
-      cpi->ref_fb_idx[BWDREF_FRAME - 1] = tmp;
-
-      memcpy(cpi->interp_filter_selected[LAST_FRAME],
-             cpi->interp_filter_selected[BWDREF_FRAME],
-             sizeof(cpi->interp_filter_selected[BWDREF_FRAME]));
-    }
-  }
-
-  // Assign virtual indexes for LAST_FRAME, GOLDEN_FRAME, and ALTREF_FRAME
-  cpi->lst_fb_idx = cpi->ref_fb_idx[LAST_FRAME - 1];
-  cpi->gld_fb_idx = cpi->ref_fb_idx[GOLDEN_FRAME - 1];
-  cpi->alt_fb_idx = cpi->ref_fb_idx[ALTREF_FRAME - 1];
-}
-
 void update_ref_frames(VP9_COMP *cpi) {
   VP9_COMMON *const cm = &cpi->common;
   BufferPool *const pool = cm->buffer_pool;
@@ -3263,10 +3062,7 @@ void update_ref_frames(VP9_COMP *cpi) {
 }
 
 void vp9_update_reference_frames(VP9_COMP *cpi) {
-  if (cpi->extra_arf_allowed)
-    update_multi_arf_ref_frames(cpi);
-  else
-    update_ref_frames(cpi);
+  update_ref_frames(cpi);
 
 #if CONFIG_VP9_TEMPORAL_DENOISING
   vp9_denoiser_update_ref_frame(cpi);