tor-browser

The Tor Browser
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GMPUtils.h (2517B)

      1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* This Source Code Form is subject to the terms of the Mozilla Public
      3 * License, v. 2.0. If a copy of the MPL was not distributed with this
      4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      5 
      6 #ifndef GMPUtils_h_
      7 #define GMPUtils_h_
      8 
      9 #include "MediaResult.h"
     10 #include "gmp-errors.h"
     11 #include "mozilla/AbstractThread.h"
     12 #include "mozilla/UniquePtr.h"
     13 #include "nsCOMPtr.h"
     14 #include "nsClassHashtable.h"
     15 #include "nsStringFwd.h"
     16 #include "nsTArray.h"
     17 
     18 #define CHROMIUM_CDM_API_BACKWARD_COMPAT "chromium-cdm10-host4"
     19 #define CHROMIUM_CDM_API "chromium-cdm11-host4"
     20 
     21 class GMPVideoEncodedFrame;
     22 class nsIFile;
     23 class nsIDirectoryEnumerator;
     24 
     25 namespace mozilla {
     26 
     27 template <typename T>
     28 struct DestroyPolicy {
     29  void operator()(T* aGMPObject) const { aGMPObject->Destroy(); }
     30 };
     31 
     32 template <typename T>
     33 using GMPUniquePtr = mozilla::UniquePtr<T, DestroyPolicy<T>>;
     34 
     35 void SplitAt(const char* aDelims, const nsACString& aInput,
     36             nsTArray<nsCString>& aOutTokens);
     37 
     38 nsCString ToHexString(const nsTArray<uint8_t>& aBytes);
     39 
     40 nsCString ToHexString(const uint8_t* aBytes, uint32_t aLength);
     41 
     42 bool FileExists(nsIFile* aFile);
     43 
     44 // Enumerate directory entries for a specified path.
     45 class DirectoryEnumerator {
     46 public:
     47  enum Mode {
     48    DirsOnly,     // Enumeration only includes directories.
     49    FilesAndDirs  // Enumeration includes directories and non-directory files.
     50  };
     51 
     52  DirectoryEnumerator(nsIFile* aPath, Mode aMode);
     53 
     54  already_AddRefed<nsIFile> Next();
     55 
     56 private:
     57  Mode mMode;
     58  nsCOMPtr<nsIDirectoryEnumerator> mIter;
     59 };
     60 
     61 class GMPInfoFileParser {
     62 public:
     63  bool Init(nsIFile* aFile);
     64  bool Contains(const nsCString& aKey) const;
     65  nsCString Get(const nsCString& aKey) const;
     66 
     67 private:
     68  nsClassHashtable<nsCStringHashKey, nsCString> mValues;
     69 };
     70 
     71 bool ReadIntoString(nsIFile* aFile, nsCString& aOutDst, size_t aMaxLength);
     72 
     73 bool HaveGMPFor(const nsACString& aAPI, const nsTArray<nsCString>& aTags);
     74 
     75 bool IsOnGMPThread();
     76 
     77 void LogToConsole(const nsAString& aMsg);
     78 
     79 already_AddRefed<nsISerialEventTarget> GetGMPThread();
     80 
     81 // Returns the number of bytes required to store an aWidth x aHeight image in
     82 // I420 format, padded so that the width and height are multiples of 16.
     83 size_t I420FrameBufferSizePadded(int32_t aWidth, int32_t aHeight);
     84 
     85 bool AdjustOpenH264NALUSequence(GMPVideoEncodedFrame* aEncodedFrame);
     86 
     87 MediaResult ToMediaResult(GMPErr aErr, const nsACString& aMessage);
     88 
     89 }  // namespace mozilla
     90 
     91 #endif