/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* 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 http://mozilla.org/MPL/2.0/. */

#ifndef EME_LOG_H_

#define EME_LOG_H_

#include "VideoUtils.h"

#include "mozilla/Logging.h"

#include "nsString.h"

#include "nsTArray.h"

namespace mozilla {

namespace dom {

class ArrayBufferViewOrArrayBuffer;

}

#ifndef EME_LOG

  LogModule* GetEMELog();

  #define EME_LOG(...) MOZ_LOG(GetEMELog(), mozilla::LogLevel::Debug, (__VA_ARGS__))

  #define EME_LOG_ENABLED() MOZ_LOG_TEST(GetEMELog(), mozilla::LogLevel::Debug)

#endif

#ifndef EME_VERBOSE_LOG

  LogModule* GetEMEVerboseLog();

  #define EME_VERBOSE_LOG(...) MOZ_LOG(GetEMEVerboseLog(), mozilla::LogLevel::Debug, (__VA_ARGS__))

#else

  #ifndef EME_LOG

    #define EME_LOG(...)

  #endif

  #ifndef EME_VERBOSE_LOG

    #define EME_VERBOSE_LOG(...)

  #endif

#endif

// Helper function to extract a copy of data coming in from JS in an

// (ArrayBuffer or ArrayBufferView) IDL typed function argument.

//

// Only call this on a properly initialized ArrayBufferViewOrArrayBuffer.

void

CopyArrayBufferViewOrArrayBufferData(const dom::ArrayBufferViewOrArrayBuffer& aBufferOrView,

                                     nsTArray<uint8_t>& aOutData);

struct ArrayData {

  explicit ArrayData(const uint8_t* aData, size_t aLength)

    : mData(aData)

    , mLength(aLength)

  {

  }

  const uint8_t* mData;

  const size_t mLength;

  bool IsValid() const {

    return mData != nullptr && mLength != 0;

  }

  bool operator== (const nsTArray<uint8_t>& aOther) const {

    return mLength == aOther.Length() &&

           memcmp(mData, aOther.Elements(), mLength) == 0;

  }

};

// Helper function to extract data coming in from JS in an

// (ArrayBuffer or ArrayBufferView) IDL typed function argument.

//

// Be *very* careful with this!

//

// Only use returned ArrayData inside the lifetime of the

// ArrayBufferViewOrArrayBuffer; the ArrayData struct does not contain

// a copy of the data!

//

// And do *not* call out to anything that could call into JavaScript,

// while the ArrayData is live, as then all bets about the data not changing

// are off! No calls into JS, no calls into JS-implemented WebIDL or XPIDL,

// nothing. Beware!

//

// Only call this on a properly initialized ArrayBufferViewOrArrayBuffer.

ArrayData

GetArrayBufferViewOrArrayBufferData(const dom::ArrayBufferViewOrArrayBuffer& aBufferOrView);

nsString

KeySystemToGMPName(const nsAString& aKeySystem);

bool

IsClearkeyKeySystem(const nsAString& aKeySystem);

bool

IsWidevineKeySystem(const nsAString& aKeySystem);

// Note: Primetime is now unsupported, but we leave it in the enum so

// that the telemetry enum values are not changed; doing so would break

// existing telemetry probes.

enum CDMType {

  eClearKey = 0,

  ePrimetime = 1, // Note: Unsupported.

  eWidevine = 2,

  eUnknown = 3

};

CDMType

ToCDMTypeTelemetryEnum(const nsString& aKeySystem);

} // namespace mozilla

#endif // EME_LOG_H_