AppleATDecoder.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 mozilla_AppleATDecoder_h

#define mozilla_AppleATDecoder_h

#include <AudioToolbox/AudioToolbox.h>

#include "PlatformDecoderModule.h"

#include "mozilla/Vector.h"

#include "AudioConverter.h"

namespace mozilla {

class TaskQueue;

DDLoggedTypeDeclNameAndBase(AppleATDecoder, MediaDataDecoder);

class AppleATDecoder final : public MediaDataDecoder,

                             public DecoderDoctorLifeLogger<AppleATDecoder> {

 public:

  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(AppleATDecoder, final);

  explicit AppleATDecoder(const AudioInfo& aConfig);

  RefPtr<InitPromise> Init() override;

  RefPtr<DecodePromise> Decode(MediaRawData* aSample) override;

  RefPtr<DecodePromise> Drain() override;

  RefPtr<FlushPromise> Flush() override;

  RefPtr<ShutdownPromise> Shutdown() override;

  nsCString GetDescriptionName() const override {

    return "apple coremedia decoder"_ns;

  nsCString GetCodecName() const override;

  // Callbacks also need access to the config.

  AudioInfo mConfig;

  // Use to extract magic cookie for HE-AAC detection.

  nsTArray<uint8_t> mMagicCookie;

  // Will be set to true should an error occurred while attempting to retrieve

  // the magic cookie property.

  bool mFileStreamError;

  nsCOMPtr<nsISerialEventTarget> mThread;

 private:

  ~AppleATDecoder();

  AudioConverterRef mConverter;

  AudioStreamBasicDescription mOutputFormat;

  UInt32 mFormatID;

  AudioFileStreamID mStream;

  nsTArray<RefPtr<MediaRawData>> mQueuedSamples;

  UniquePtr<AudioConfig::ChannelLayout> mChannelLayout;

  UniquePtr<AudioConverter> mAudioConverter;

  DecodedData mDecodedSamples;

  void ProcessShutdown();

  MediaResult DecodeSample(MediaRawData* aSample);

  MediaResult GetInputAudioDescription(AudioStreamBasicDescription& aDesc,

                                       const nsTArray<uint8_t>& aExtraData);

  // Setup AudioConverter once all information required has been gathered.

  // Will return NS_ERROR_NOT_INITIALIZED if more data is required.

  MediaResult SetupDecoder(MediaRawData* aSample);

  nsresult GetImplicitAACMagicCookie(MediaRawData* aSample);

  nsresult SetupChannelLayout();

  uint32_t mParsedFramesForAACMagicCookie;

  uint32_t mEncoderDelay = 0;

  uint64_t mTotalMediaFrames = 0;

  bool mIsADTS = false;

  bool mErrored;

};

}  // namespace mozilla

#endif  // mozilla_AppleATDecoder_h