Reland of "Change type of pid_diff (int16_t -> uint8_t) according to updates in RTP payload profile…

webrtc/modules/include/module_common_types.h

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 113 matching lines @@
         assert(false);
     }
   }
 
   void CopyGofInfoVP9(const GofInfoVP9& src) {
     num_frames_in_gof = src.num_frames_in_gof;
     for (size_t i = 0; i < num_frames_in_gof; ++i) {
       temporal_idx[i] = src.temporal_idx[i];
       temporal_up_switch[i] = src.temporal_up_switch[i];
       num_ref_pics[i] = src.num_ref_pics[i];
-      for (size_t r = 0; r < num_ref_pics[i]; ++r) {
+      for (uint8_t r = 0; r < num_ref_pics[i]; ++r) {
         pid_diff[i][r] = src.pid_diff[i][r];
       }
     }
   }
 
   size_t num_frames_in_gof;
   uint8_t temporal_idx[kMaxVp9FramesInGof];
   bool temporal_up_switch[kMaxVp9FramesInGof];
-  size_t num_ref_pics[kMaxVp9FramesInGof];
-  int16_t pid_diff[kMaxVp9FramesInGof][kMaxVp9RefPics];
+  uint8_t num_ref_pics[kMaxVp9FramesInGof];
+  uint8_t pid_diff[kMaxVp9FramesInGof][kMaxVp9RefPics];
 };
 
 struct RTPVideoHeaderVP9 {
   void InitRTPVideoHeaderVP9() {
     inter_pic_predicted = false;
     flexible_mode = false;
     beginning_of_frame = false;
     end_of_frame = false;
     ss_data_available = false;
     picture_id = kNoPictureId;
@@ skipping 23 matching lines @@
                            // kNoTl0PicIdx means no value provided.
   uint8_t temporal_idx;    // Temporal layer index, or kNoTemporalIdx.
   uint8_t spatial_idx;     // Spatial layer index, or kNoSpatialIdx.
   bool temporal_up_switch;  // True if upswitch to higher frame rate is possible
                             // starting from this frame.
   bool inter_layer_predicted;  // Frame is dependent on directly lower spatial
                                // layer frame.
 
   uint8_t gof_idx;  // Index to predefined temporal frame info in SS data.
 
-  size_t num_ref_pics;  // Number of reference pictures used by this layer
-                        // frame.
-  int16_t pid_diff[kMaxVp9RefPics];  // P_DIFF signaled to derive the PictureID
+  uint8_t num_ref_pics;  // Number of reference pictures used by this layer
+                         // frame.
+  uint8_t pid_diff[kMaxVp9RefPics];  // P_DIFF signaled to derive the PictureID
                                      // of the reference pictures.
   int16_t ref_picture_id[kMaxVp9RefPics];  // PictureID of reference pictures.
 
   // SS data.
   size_t num_spatial_layers;  // Always populated.
   bool spatial_layer_resolution_present;
   uint16_t width[kMaxVp9NumberOfSpatialLayers];
   uint16_t height[kMaxVp9NumberOfSpatialLayers];
   GofInfoVP9 gof;
 };
@@ skipping 600 matching lines @@
     return unwrapped;
   }
 
  private:
   int64_t last_seq_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_INCLUDE_MODULE_COMMON_TYPES_H_