Convert Vp9 Rtp headers to frame references.

webrtc/modules/video_coding/packet_buffer.h

Index: webrtc/modules/video_coding/packet_buffer.h
diff --git a/webrtc/modules/video_coding/packet_buffer.h b/webrtc/modules/video_coding/packet_buffer.h
index caa81f6b99e99f8400298dbc70558676ddcb2606..bf8af153eb5adde0c23c0dbd667ff17ab40d9946 100644
--- a/webrtc/modules/video_coding/packet_buffer.h
+++ b/webrtc/modules/video_coding/packet_buffer.h
@@ -12,6 +12,7 @@
 #define WEBRTC_MODULES_VIDEO_CODING_PACKET_BUFFER_H_
 
 #include <array>
+#include <utility>
 #include <vector>
 #include <map>
 #include <set>
@@ -20,6 +21,7 @@
 #include "webrtc/base/criticalsection.h"
 #include "webrtc/base/scoped_ptr.h"
 #include "webrtc/base/thread_annotations.h"
+#include "webrtc/modules/include/module_common_types.h"
 #include "webrtc/modules/video_coding/packet.h"
 #include "webrtc/modules/video_coding/sequence_number_util.h"
 
@@ -48,10 +50,11 @@ class PacketBuffer {
 
  private:
   static const uint16_t kPicIdLength = 1 << 7;
-  static const uint8_t kMaxTemporalLayer = 5;
+  static const uint8_t kMaxTemporalLayers = 5;
   static const int kMaxStashedFrames = 10;
   static const int kMaxLayerInfo = 10;
   static const int kMaxNotYetReceivedFrames = 20;
+  static const int kMaxGofSaved = 15;
 
   friend RtpFrameObject;
   // Since we want the packet buffer to be as packet type agnostic
@@ -115,10 +118,38 @@ class PacketBuffer {
   void CompletedFrameVp8(std::unique_ptr<RtpFrameObject> frame)
       EXCLUSIVE_LOCKS_REQUIRED(crit_);
 
+  // Find references for Vp9 frames
+  void ManageFrameVp9(std::unique_ptr<RtpFrameObject> frame)
+      EXCLUSIVE_LOCKS_REQUIRED(crit_);
+
+  // Unwrap the picture id and the frame references  and then call the
+  // |frame_callback| callback with the completed frame.
+  void CompletedFrameVp9(std::unique_ptr<RtpFrameObject> frame)
+      EXCLUSIVE_LOCKS_REQUIRED(crit_);
+
+  // Check if we are missing a frame necessary to determine the references
+  // for this frame.
+  bool MissingRequiredFrameVp9(uint16_t picture_id, const GofInfoVP9& gof)
+      EXCLUSIVE_LOCKS_REQUIRED(crit_);
+
+  // Updates which frames that have been received. If there is a gap,
+  // missing frames will be added to |missing_frames_for_layer_| or
+  // if this is an already missing frame then it will be removed.
+  void FrameReceivedVp9(uint16_t picture_id, const GofInfoVP9& gof)
+      EXCLUSIVE_LOCKS_REQUIRED(crit_);
+
+  // Check if there is a frame with the up-switch flag set in the interval
+  // (|pid_ref|, |picture_id|) with temporal layer smaller than |temporal_idx|.
+  bool UpSwitchInIntervalVp9(uint16_t picture_id,
+                             uint8_t temporal_idx,
+                             uint16_t pid_ref)
+      EXCLUSIVE_LOCKS_REQUIRED(crit_);
+
   // All picture ids are unwrapped to 16 bits.
   uint16_t UnwrapPictureId(uint16_t picture_id)
       EXCLUSIVE_LOCKS_REQUIRED(crit_);
 
+
   rtc::CriticalSection crit_;
 
   // Buffer size_ and max_size_ must always be a power of two.
@@ -160,7 +191,7 @@ class PacketBuffer {
 
   // Frames earlier than the last received frame that have not yet been
   // fully received.
-  std::set<uint8_t, DescendingSeqNumComp<uint8_t, kPicIdLength>>
+  std::set<uint16_t, DescendingSeqNumComp<uint16_t, kPicIdLength>>
     not_yet_received_frames_ GUARDED_BY(crit_);
 
   // Frames that have been fully received but didn't have all the information
@@ -170,8 +201,30 @@ class PacketBuffer {
   // Holds the information about the last completed frame for a given temporal
   // layer given a Tl0 picture index.
   std::map<uint8_t,
-          std::array<int16_t, kMaxTemporalLayer>,
+          std::array<int16_t, kMaxTemporalLayers>,
           DescendingSeqNumComp<uint8_t>> layer_info_ GUARDED_BY(crit_);
+
+  // Where the current scalability structure is in the
+  // |scalability_structures_| array.
+  uint8_t current_ss_idx_;
+
+  // Holds received scalability structures.
+  std::array<GofInfoVP9, kMaxGofSaved>
+    scalability_structures_ GUARDED_BY(crit_);
+
+  // Holds the picture id and the Gof information for a given TL0 picture index.
+  std::map<uint8_t,
+          std::pair<uint16_t, GofInfoVP9*>,
+          DescendingSeqNumComp<uint8_t>> gof_info_ GUARDED_BY(crit_);
+
+  // Keep track of which picture id and which temporal layer that had the
+  // up switch flag set.
+  std::map<uint16_t, uint8_t> up_switch_ GUARDED_BY(crit_);
+
+  // For every temporal layer, keep a set of which frames that are missing.
+  std::array<
+    std::set<uint16_t, DescendingSeqNumComp<uint16_t, kPicIdLength>>,
+    kMaxTemporalLayers> missing_frames_for_layer_ GUARDED_BY(crit_);
 };
 
 }  // namespace video_coding