From bb505879d66bc311f8662f8642eca6a325a0ad05 Mon Sep 17 00:00:00 2001
From: Minghai Shang <minghai@google.com>
Date: Thu, 1 May 2014 12:00:39 -0700
Subject: [PATCH] [spatial svc] No need to  code full  width and height for non
 key frame

Change-Id: I62ab0f4346b4157a90dc5b5f73ab5e597d69c1bd
---
 vp9/encoder/vp9_bitstream.c |  7 ++++---
 vp9/encoder/vp9_ratectrl.c  | 15 +++++++++++++++
 2 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/vp9/encoder/vp9_bitstream.c b/vp9/encoder/vp9_bitstream.c
index c5a85c9..35d2ecf 100644
--- a/vp9/encoder/vp9_bitstream.c
+++ b/vp9/encoder/vp9_bitstream.c
@@ -1006,9 +1006,10 @@ static void write_frame_size_with_refs(VP9_COMP *cpi,
     found = cm->width == cfg->y_crop_width &&
             cm->height == cfg->y_crop_height;
 
-    // TODO(ivan): This prevents a bug while more than 3 buffers are used. Do it
-    // in a better way.
-    if (cpi->use_svc) {
+    // Set "found" to 0 for temporal svc and for spatial svc key frame
+    if (cpi->use_svc &&
+        (cpi->svc.number_spatial_layers == 1 ||
+         cpi->svc.layer_context[cpi->svc.spatial_layer_id].is_key_frame)) {
       found = 0;
     }
     vp9_wb_write_bit(wb, found);
diff --git a/vp9/encoder/vp9_ratectrl.c b/vp9/encoder/vp9_ratectrl.c
index b123bfd..8a22f81 100644
--- a/vp9/encoder/vp9_ratectrl.c
+++ b/vp9/encoder/vp9_ratectrl.c
@@ -1306,11 +1306,26 @@ void vp9_rc_get_svc_params(VP9_COMP *cpi) {
           cpi->oxcf.key_freq == 0))) {
     cm->frame_type = KEY_FRAME;
     rc->source_alt_ref_active = 0;
+
+    if (cpi->use_svc && cpi->svc.number_temporal_layers == 1) {
+      cpi->svc.layer_context[cpi->svc.spatial_layer_id].is_key_frame = 1;
+    }
+
     if (cpi->pass == 0 && cpi->oxcf.rc_mode == RC_MODE_CBR) {
       target = calc_iframe_target_size_one_pass_cbr(cpi);
     }
   } else {
     cm->frame_type = INTER_FRAME;
+
+    if (cpi->use_svc && cpi->svc.number_temporal_layers == 1) {
+      LAYER_CONTEXT *lc = &cpi->svc.layer_context[cpi->svc.spatial_layer_id];
+      if (cpi->svc.spatial_layer_id == 0) {
+        lc->is_key_frame = 0;
+      } else {
+        lc->is_key_frame = cpi->svc.layer_context[0].is_key_frame;
+      }
+    }
+
     if (cpi->pass == 0 && cpi->oxcf.rc_mode == RC_MODE_CBR) {
       target = calc_pframe_target_size_one_pass_cbr(cpi);
     }
-- 
2.7.4