FFmpegDataDecoder.h

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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 __FFmpegDataDecoder_h__

#define __FFmpegDataDecoder_h__

#include "FFmpegLibWrapper.h"

#include "PlatformDecoderModule.h"

#include "mozilla/StaticMutex.h"

// This must be the last header included

#include "FFmpegLibs.h"

namespace mozilla {

template <int V>

class FFmpegDataDecoder : public MediaDataDecoder {};

template <>

class FFmpegDataDecoder<LIBAV_VER>;

DDLoggedTypeNameAndBase(FFmpegDataDecoder<LIBAV_VER>, MediaDataDecoder);

template <>

class FFmpegDataDecoder<LIBAV_VER>

    : public MediaDataDecoder,

      public DecoderDoctorLifeLogger<FFmpegDataDecoder<LIBAV_VER>> {

 public:

  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(FFmpegDataDecoder, final);

  FFmpegDataDecoder(FFmpegLibWrapper* aLib, AVCodecID aCodecID);

  static bool Link();

  RefPtr<InitPromise> Init() override = 0;

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

  RefPtr<DecodePromise> Drain() override;

  RefPtr<FlushPromise> Flush() override;

  RefPtr<ShutdownPromise> Shutdown() override;

  static AVCodec* FindAVCodec(FFmpegLibWrapper* aLib, AVCodecID aCodec);

#ifdef MOZ_WIDGET_GTK

  static AVCodec* FindHardwareAVCodec(FFmpegLibWrapper* aLib, AVCodecID aCodec);

#endif

 protected:

  // Flush and Drain operation, always run

  virtual RefPtr<FlushPromise> ProcessFlush();

  virtual void ProcessShutdown();

  virtual void InitCodecContext() MOZ_REQUIRES(sMutex) {}

  AVFrame* PrepareFrame();

  MediaResult InitDecoder(AVDictionary** aOptions);

  MediaResult AllocateExtraData();

  MediaResult DoDecode(MediaRawData* aSample, bool* aGotFrame,

                       DecodedData& aResults);

  FFmpegLibWrapper* mLib;  // set in constructor

  // mCodecContext is accessed on taskqueue only, no locking needed

  AVCodecContext* mCodecContext;

  AVCodecParserContext* mCodecParser;

  AVFrame* mFrame;

  RefPtr<MediaByteBuffer> mExtraData;

  AVCodecID mCodecID;  // set in constructor

  bool mVideoCodec;

 protected:

  virtual ~FFmpegDataDecoder();

  static StaticMutex sMutex;  // used to provide critical-section locking

                              // for calls into ffmpeg

  const RefPtr<TaskQueue> mTaskQueue;  // set in constructor

 private:

  RefPtr<DecodePromise> ProcessDecode(MediaRawData* aSample);

  RefPtr<DecodePromise> ProcessDrain();

  virtual MediaResult DoDecode(MediaRawData* aSample, uint8_t* aData, int aSize,

                               bool* aGotFrame,

                               MediaDataDecoder::DecodedData& aOutResults) = 0;

  virtual bool NeedParser() const { return false; }

  virtual int ParserFlags() const { return PARSER_FLAG_COMPLETE_FRAMES; }

  MozPromiseHolder<DecodePromise> mPromise;

  media::TimeUnit mLastInputDts;  // used on Taskqueue

};

}  // namespace mozilla

#endif  // __FFmpegDataDecoder_h__