Convert Vp9 Rtp headers to frame references.

webrtc/modules/include/module_common_types.h

Index: webrtc/modules/include/module_common_types.h
diff --git a/webrtc/modules/include/module_common_types.h b/webrtc/modules/include/module_common_types.h
index 82d87d5c5c721ee694e3e77a420611a9f36277f7..56a2dc602c161787eb2e1ac3836cd052ee399acf 100644
--- a/webrtc/modules/include/module_common_types.h
+++ b/webrtc/modules/include/module_common_types.h
@@ -72,8 +72,9 @@ struct RTPVideoHeaderVP8 {
 
 enum TemporalStructureMode {
   kTemporalStructureMode1,    // 1 temporal layer structure - i.e., IPPP...
-  kTemporalStructureMode2,    // 2 temporal layers 0-1-0-1...
-  kTemporalStructureMode3     // 3 temporal layers 0-2-1-2-0-2-1-2...
+  kTemporalStructureMode2,    // 2 temporal layers 01...
+  kTemporalStructureMode3,    // 3 temporal layers 0212...
+  kTemporalStructureMode4     // 3 temporal layers 02120212...
 };
 
 struct GofInfoVP9 {
@@ -121,6 +122,52 @@ struct GofInfoVP9 {
         pid_diff[3][0] = 1;
         pid_diff[3][1] = 2;
         break;
+      case kTemporalStructureMode4:
+        num_frames_in_gof = 8;
+        temporal_idx[0] = 0;
+        temporal_up_switch[0] = false;
+        num_ref_pics[0] = 1;
+        pid_diff[0][0] = 4;
+
+        temporal_idx[1] = 2;
+        temporal_up_switch[1] = true;
+        num_ref_pics[1] = 1;
+        pid_diff[1][0] = 1;
+
+        temporal_idx[2] = 1;
+        temporal_up_switch[2] = true;
+        num_ref_pics[2] = 1;
+        pid_diff[2][0] = 2;
+
+        temporal_idx[3] = 2;
+        temporal_up_switch[3] = false;
+        num_ref_pics[3] = 2;
+        pid_diff[3][0] = 1;
+        pid_diff[3][1] = 2;
+
+        temporal_idx[4] = 0;
+        temporal_up_switch[0] = false;
+        num_ref_pics[4] = 1;
+        pid_diff[4][0] = 4;
+
+        temporal_idx[5] = 2;
+        temporal_up_switch[1] = false;
+        num_ref_pics[5] = 2;
+        pid_diff[5][0] = 1;
+        pid_diff[5][1] = 2;
+
+        temporal_idx[6] = 1;
+        temporal_up_switch[2] = false;
+        num_ref_pics[6] = 2;
+        pid_diff[6][0] = 2;
+        pid_diff[6][1] = 4;
+
+        temporal_idx[7] = 2;
+        temporal_up_switch[3] = false;
+        num_ref_pics[7] = 2;
+        pid_diff[7][0] = 1;
+        pid_diff[7][1] = 2;
+        break;
       default:
         assert(false);
     }
@@ -143,6 +190,7 @@ struct GofInfoVP9 {
   bool temporal_up_switch[kMaxVp9FramesInGof];
   uint8_t num_ref_pics[kMaxVp9FramesInGof];
   uint8_t pid_diff[kMaxVp9FramesInGof][kMaxVp9RefPics];
+  uint16_t pid_start;
 };
 
 struct RTPVideoHeaderVP9 {