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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at */
#ifndef GMPUtils_h_
#define GMPUtils_h_
#include "mozilla/AbstractThread.h"
#include "mozilla/RefPtr.h"
#include "mozilla/UniquePtr.h"
#include "nsCOMPtr.h"
#include "nsClassHashtable.h"
#include "nsStringFwd.h"
#include "nsTArray.h"
#define CHROMIUM_CDM_API_BACKWARD_COMPAT "chromium-cdm9-host4"
#define CHROMIUM_CDM_API "chromium-cdm10-host4"
class nsIFile;
class nsIDirectoryEnumerator;
namespace mozilla {
template <typename T>
struct DestroyPolicy {
void operator()(T* aGMPObject) const { aGMPObject->Destroy(); }
template <typename T>
using GMPUniquePtr = mozilla::UniquePtr<T, DestroyPolicy<T>>;
void SplitAt(const char* aDelims, const nsACString& aInput,
nsTArray<nsCString>& aOutTokens);
nsCString ToHexString(const nsTArray<uint8_t>& aBytes);
nsCString ToHexString(const uint8_t* aBytes, uint32_t aLength);
bool FileExists(nsIFile* aFile);
// Enumerate directory entries for a specified path.
class DirectoryEnumerator {
enum Mode {
DirsOnly, // Enumeration only includes directories.
FilesAndDirs // Enumeration includes directories and non-directory files.
DirectoryEnumerator(nsIFile* aPath, Mode aMode);
already_AddRefed<nsIFile> Next();
Mode mMode;
nsCOMPtr<nsIDirectoryEnumerator> mIter;
class GMPInfoFileParser {
bool Init(nsIFile* aFile);
bool Contains(const nsCString& aKey) const;
nsCString Get(const nsCString& aKey) const;
nsClassHashtable<nsCStringHashKey, nsCString> mValues;
bool ReadIntoString(nsIFile* aFile, nsCString& aOutDst, size_t aMaxLength);
bool HaveGMPFor(const nsCString& aAPI, nsTArray<nsCString>&& aTags);
void LogToConsole(const nsAString& aMsg);
already_AddRefed<nsISerialEventTarget> GetGMPThread();
// Returns the number of bytes required to store an aWidth x aHeight image in
// I420 format, padded so that the width and height are multiples of 16.
size_t I420FrameBufferSizePadded(int32_t aWidth, int32_t aHeight);
} // namespace mozilla