WMFUtils.h - mozsearch

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

/* vim:set ts=2 sw=2 sts=2 et cindent: */

/* 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 WMFUtils_h

#define WMFUtils_h

#include <hstring.h>

#include <winstring.h>

#include "ImageTypes.h"

#include "TimeUnits.h"

#include "VideoUtils.h"

#include "WMF.h"

#include "mozilla/gfx/Rect.h"

#include "nsString.h"

// Various utilities shared by WMF backend files.

namespace mozilla {

static const GUID CLSID_MSOpusDecoder = {

    0x63e17c10,

    0x2d43,

    0x4c42,

    {0x8f, 0xe3, 0x8d, 0x8b, 0x63, 0xe4, 0x6a, 0x6a}};

// Media types supported by Media Foundation.

enum class WMFStreamType {

  Unknown,

  H264,

  VP8,

  VP9,

  AV1,

  HEVC,

  MP3,

  AAC,

  OPUS,

  VORBIS,

  SENTINEL

};

bool StreamTypeIsVideo(const WMFStreamType& aType);

bool StreamTypeIsAudio(const WMFStreamType& aType);

// Get a string representation of the stream type. Useful for logging.

const char* StreamTypeToString(WMFStreamType aStreamType);

WMFStreamType GetStreamTypeFromMimeType(const nsCString& aMimeType);

// Converts from microseconds to hundreds of nanoseconds.

// We use microseconds for our timestamps, whereas WMF uses

// hundreds of nanoseconds.

inline int64_t UsecsToHNs(int64_t aUsecs) { return aUsecs * 10; }

// Converts from hundreds of nanoseconds to microseconds.

// We use microseconds for our timestamps, whereas WMF uses

// hundreds of nanoseconds.

inline int64_t HNsToUsecs(int64_t hNanoSecs) { return hNanoSecs / 10; }

HRESULT HNsToFrames(int64_t aHNs, uint32_t aRate, int64_t* aOutFrames);

HRESULT

GetDefaultStride(IMFMediaType* aType, uint32_t aWidth, uint32_t* aOutStride);

Maybe<gfx::YUVColorSpace> GetYUVColorSpace(IMFMediaType* aType);

int32_t MFOffsetToInt32(const MFOffset& aOffset);

// Gets the sub-region of the video frame that should be displayed.

// See:

// http://msdn.microsoft.com/en-us/library/windows/desktop/bb530115(v=vs.85).aspx

HRESULT

GetPictureRegion(IMFMediaType* aMediaType, gfx::IntRect& aOutPictureRegion);

// Returns the duration of a IMFSample in TimeUnit.

// Returns media::TimeUnit::Invalid() on failure.

media::TimeUnit GetSampleDuration(IMFSample* aSample);

// Returns the presentation time of a IMFSample in TimeUnit.

// Returns media::TimeUnit::Invalid() on failure.

media::TimeUnit GetSampleTime(IMFSample* aSample);

inline bool IsFlagSet(DWORD flags, DWORD pattern) {

  return (flags & pattern) == pattern;

// Will return %ProgramW6432% value as per:

// https://msdn.microsoft.com/library/windows/desktop/aa384274.aspx

nsString GetProgramW6432Path();

const char* MFTMessageTypeToStr(MFT_MESSAGE_TYPE aMsg);

GUID AudioMimeTypeToMediaFoundationSubtype(const nsACString& aMimeType);

GUID VideoMimeTypeToMediaFoundationSubtype(const nsACString& aMimeType);

void AACAudioSpecificConfigToUserData(uint8_t aAACProfileLevelIndication,

                                      const uint8_t* aAudioSpecConfig,

                                      uint32_t aConfigLength,

                                      nsTArray<BYTE>& aOutUserData);

class ScopedHString final {

 public:

  explicit ScopedHString(const nsAString& aStr) {

    WindowsCreateString(PromiseFlatString(aStr).get(), aStr.Length(), &mString);

  explicit ScopedHString(const WCHAR aCharArray[]) {

    WindowsCreateString(aCharArray, wcslen(aCharArray), &mString);

  ~ScopedHString() { WindowsDeleteString(mString); }

  const HSTRING& Get() { return mString; }

 private:

  HSTRING mString;

};

}  // namespace mozilla

#endif