H264Decoder: Handle gaps in frame_num.

content/common/gpu/media/h264_dpb.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // This file contains an implementation of an H.264 Decoded Picture Buffer
 // used in H264 decoders.
 
 #ifndef CONTENT_COMMON_GPU_MEDIA_H264_DPB_H_
 #define CONTENT_COMMON_GPU_MEDIA_H264_DPB_H_
 
@@ skipping 21 matching lines @@
   };
 
   H264Picture();
 
   virtual V4L2H264Picture* AsV4L2H264Picture();
   virtual VaapiH264Picture* AsVaapiH264Picture();
 
   // Values calculated per H.264 specification or taken from slice header.
   // See spec for more details on each (some names have been converted from
   // CamelCase in spec to Chromium-style names).
+  int pic_order_cnt_type;
   int top_field_order_cnt;
   int bottom_field_order_cnt;
   int pic_order_cnt;
   int pic_order_cnt_msb;
   int pic_order_cnt_lsb;
+  int delta_pic_order_cnt_bottom;
+  int delta_pic_order_cnt0;
+  int delta_pic_order_cnt1;
 
   int pic_num;
   int long_term_pic_num;
   int frame_num;  // from slice header
   int frame_num_offset;
   int frame_num_wrap;
   int long_term_frame_idx;
 
   media::H264SliceHeader::Type type;
+  int nal_ref_idc;
   bool idr;  // IDR picture?
+  int idr_pic_id;  // Valid only if idr == true.
   bool ref;  // reference picture?
   bool long_term;  // long term reference picture?
   bool outputted;
   // Does memory management op 5 needs to be executed after this
   // picture has finished decoding?
   bool mem_mgmt_5;
 
+  // Created by the decoding process for gaps in frame_num.
+  // Not for decode or output.
+  bool nonexisting;
+
   Field field;
 
   // Values from slice_hdr to be used during reference marking and
   // memory management after finishing this picture.
   bool long_term_reference_flag;
   bool adaptive_ref_pic_marking_mode_flag;
   media::H264DecRefPicMarking
       ref_pic_marking[media::H264SliceHeader::kRefListSize];
 
   // Position in DPB (i.e. index in DPB).
@@ skipping 81 matching lines @@
 
   H264Picture::Vector pics_;
   size_t max_num_pics_;
 
   DISALLOW_COPY_AND_ASSIGN(H264DPB);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_MEDIA_H264_DPB_H_