/* 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 DOM_MEDIA_IPC_MFMEDIAENGINEUTILS_H_
#define DOM_MEDIA_IPC_MFMEDIAENGINEUTILS_H_

#include "MFMediaEngineExtra.h"
#include "ipc/EnumSerializer.h"
#include "mozilla/Logging.h"
#include "mozilla/ProfilerMarkerTypes.h"

namespace mozilla {

inline LazyLogModule gMFMediaEngineLog{"MFMediaEngine"};

// https://docs.microsoft.com/en-us/windows/win32/api/mfmediaengine/ne-mfmediaengine-mf_media_engine_event
using MFMediaEngineEvent = MF_MEDIA_ENGINE_EVENT;

// https://docs.microsoft.com/en-us/windows/win32/api/mfmediaengine/ne-mfmediaengine-mf_media_engine_err
using MFMediaEngineError = MF_MEDIA_ENGINE_ERR;

#define LOG_AND_WARNING(msg, ...)                                \
  do {                                                           \
    NS_WARNING(nsPrintfCString(msg, rv).get());                  \
    MOZ_LOG(gMFMediaEngineLog, LogLevel::Debug,                  \
            ("%s:%d, " msg, __FILE__, __LINE__, ##__VA_ARGS__)); \
  } while (false)

#ifndef RETURN_IF_FAILED
#  define RETURN_IF_FAILED(x)                           \
    do {                                                \
      HRESULT rv = x;                                   \
      if (MOZ_UNLIKELY(FAILED(rv))) {                   \
        LOG_AND_WARNING("(" #x ") failed, rv=%lx", rv); \
        return rv;                                      \
      }                                                 \
    } while (false)
#endif

#ifndef RETURN_VOID_IF_FAILED
#  define RETURN_VOID_IF_FAILED(x)                      \
    do {                                                \
      HRESULT rv = x;                                   \
      if (MOZ_UNLIKELY(FAILED(rv))) {                   \
        LOG_AND_WARNING("(" #x ") failed, rv=%lx", rv); \
        return;                                         \
      }                                                 \
    } while (false)
#endif

#ifndef RETURN_PARAM_IF_FAILED
#  define RETURN_PARAM_IF_FAILED(x, defaultOut)         \
    do {                                                \
      HRESULT rv = x;                                   \
      if (MOZ_UNLIKELY(FAILED(rv))) {                   \
        LOG_AND_WARNING("(" #x ") failed, rv=%lx", rv); \
        return defaultOut;                              \
      }                                                 \
    } while (false)
#endif

#define ENGINE_MARKER(markerName) \
  PROFILER_MARKER(markerName, MEDIA_PLAYBACK, {}, MediaEngineMarker, Id())

#define ENGINE_MARKER_TEXT(markerName, text)                                   \
  PROFILER_MARKER(markerName, MEDIA_PLAYBACK, {}, MediaEngineTextMarker, Id(), \
                  text)

const char* MediaEventTypeToStr(MediaEventType aType);
const char* MediaEngineEventToStr(MF_MEDIA_ENGINE_EVENT aEvent);
const char* MFMediaEngineErrorToStr(MFMediaEngineError aError);
const char* GUIDToStr(GUID aGUID);
const char* MFVideoRotationFormatToStr(MFVideoRotationFormat aFormat);
const char* MFVideoTransferFunctionToStr(MFVideoTransferFunction aFunc);
const char* MFVideoPrimariesToStr(MFVideoPrimaries aPrimaries);
void ByteArrayFromGUID(REFGUID aGuidIn, nsTArray<uint8_t>& aByteArrayOut);
void GUIDFromByteArray(const nsTArray<uint8_t>& aByteArrayIn, GUID& aGuidOut);

// See cdm::SubsampleEntry
struct MediaFoundationSubsampleEntry {
  uint32_t mClearBytes;
  uint32_t mCipherBytes;
};

template <typename T>
class ScopedCoMem {
 public:
  ScopedCoMem() : mPtr(nullptr) {}

  ~ScopedCoMem() { Reset(nullptr); }

  ScopedCoMem(const ScopedCoMem&) = delete;
  ScopedCoMem& operator=(const ScopedCoMem&) = delete;

  T** operator&() {               // NOLINT
    MOZ_ASSERT(mPtr == nullptr);  // To catch memory leaks.
    return &mPtr;
  }

  operator T*() { return mPtr; }

  T* operator->() {
    MOZ_ASSERT(mPtr != nullptr);
    return mPtr;
  }

  const T* operator->() const {
    MOZ_ASSERT(mPtr != nullptr);
    return mPtr;
  }

  explicit operator bool() const { return mPtr; }

  friend bool operator==(const ScopedCoMem& lhs, std::nullptr_t) {
    return lhs.Get() == nullptr;
  }

  friend bool operator==(std::nullptr_t, const ScopedCoMem& rhs) {
    return rhs.Get() == nullptr;
  }

  friend bool operator!=(const ScopedCoMem& lhs, std::nullptr_t) {
    return lhs.Get() != nullptr;
  }

  friend bool operator!=(std::nullptr_t, const ScopedCoMem& rhs) {
    return rhs.Get() != nullptr;
  }

  void Reset(T* ptr) {
    if (mPtr) CoTaskMemFree(mPtr);
    mPtr = ptr;
  }

  T* Get() const { return mPtr; }

 private:
  T* mPtr;
};

}  // namespace mozilla

namespace IPC {

template <>
struct ParamTraits<mozilla::MFMediaEngineError>
    : public ContiguousEnumSerializerInclusive<
          mozilla::MFMediaEngineError,
          mozilla::MFMediaEngineError::MF_MEDIA_ENGINE_ERR_ABORTED,
          mozilla::MFMediaEngineError::MF_MEDIA_ENGINE_ERR_ENCRYPTED> {};

template <>
struct ParamTraits<mozilla::MFMediaEngineEvent>
    : public ContiguousEnumSerializerInclusive<
          mozilla::MFMediaEngineEvent,
          mozilla::MFMediaEngineEvent::MF_MEDIA_ENGINE_EVENT_LOADSTART,
          mozilla::MFMediaEngineEvent::
              MF_MEDIA_ENGINE_EVENT_AUDIOENDPOINTCHANGE> {};

}  // namespace IPC

#endif  // DOM_MEDIA_IPC_MFMEDIAENGINECHILD_H_