CdmAdapter: Report size of the file read by CDM via FileIO.

media/cdm/ppapi/cdm_file_io_impl.h

 // Copyright 2013 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.
 
 #ifndef MEDIA_CDM_PPAPI_CDM_FILE_IO_IMPL_H_
 #define MEDIA_CDM_PPAPI_CDM_FILE_IO_IMPL_H_
 
 #include <algorithm>
 #include <string>
 #include <vector>
@@ skipping 17 matching lines @@
   // There should be only one instance of ResourceTracker in a process. Also,
   // ResourceTracker should outlive all CdmFileIOImpl instances.
   class ResourceTracker {
    public:
     ResourceTracker();
     ~ResourceTracker();
    private:
     DISALLOW_COPY_AND_ASSIGN(ResourceTracker);
   };
 
-  CdmFileIOImpl(cdm::FileIOClient* client, PP_Instance pp_instance);
+  CdmFileIOImpl(cdm::FileIOClient* client,
+                PP_Instance pp_instance,
+                const pp::CompletionCallback& last_read_file_size_kb_cb);

[ddorwin, 2014/09/12 02:26:28]

s/kb/bytes/ - the value passed is bytes - this code doesn't care how it's being
reported.
Actually, it doesn't really matter that it's last read either.
read_complete_cb? With a comment that that the value passed is the number of
bytes read.

[xhwang, 2014/09/12 04:30:12]

I renamed all other places but forgot this one. Renamed to file_read_cb.

 
   // cdm::FileIO implementation.
   virtual void Open(const char* file_name, uint32_t file_name_size) OVERRIDE;
   virtual void Read() OVERRIDE;
   virtual void Write(const uint8_t* data, uint32_t data_size) OVERRIDE;
   virtual void Close() OVERRIDE;
 
  private:
   enum State {
     FILE_UNOPENED = 0,
@@ skipping 106 matching lines @@
   std::vector<char> io_buffer_;
 
   // Offset into the file for reading/writing data. When writing data to the
   // file, this is also the offset to the |io_buffer_|.
   size_t io_offset_;
 
   // Buffer to hold all read data requested. This buffer is passed to |client_|
   // when read completes.
   std::vector<char> cumulative_read_buffer_;
 
+  // Callback to report size of the last read file.
+  pp::CompletionCallback file_read_cb_;
+
   DISALLOW_COPY_AND_ASSIGN(CdmFileIOImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_CDM_PPAPI_CDM_FILE_IO_IMPL_H_