gecko/content/media/wmf/WMFReader.h

125 lines
4.0 KiB
C++

/* -*- 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/. */
#if !defined(WMFReader_h_)
#define WMFReader_h_
#include "WMF.h"
#include "MediaDecoderReader.h"
#include "nsAutoPtr.h"
namespace mozilla {
class WMFByteStream;
class WMFSourceReaderCallback;
class DXVA2Manager;
namespace dom {
class TimeRanges;
}
// Decoder backend for reading H.264/AAC in MP4/M4A and MP3 audio files,
// using Windows Media Foundation.
class WMFReader : public MediaDecoderReader
{
public:
WMFReader(AbstractMediaDecoder* aDecoder);
virtual ~WMFReader();
nsresult Init(MediaDecoderReader* aCloneDonor) MOZ_OVERRIDE;
bool DecodeAudioData() MOZ_OVERRIDE;
bool DecodeVideoFrame(bool &aKeyframeSkip,
int64_t aTimeThreshold) MOZ_OVERRIDE;
bool HasAudio() MOZ_OVERRIDE;
bool HasVideo() MOZ_OVERRIDE;
nsresult ReadMetadata(VideoInfo* aInfo,
MetadataTags** aTags) MOZ_OVERRIDE;
nsresult Seek(int64_t aTime,
int64_t aStartTime,
int64_t aEndTime,
int64_t aCurrentTime) MOZ_OVERRIDE;
nsresult GetBuffered(mozilla::dom::TimeRanges* aBuffered,
int64_t aStartTime) MOZ_OVERRIDE;
void OnDecodeThreadStart() MOZ_OVERRIDE;
void OnDecodeThreadFinish() MOZ_OVERRIDE;
private:
HRESULT ConfigureAudioDecoder();
HRESULT ConfigureVideoDecoder();
HRESULT ConfigureVideoFrameGeometry(IMFMediaType* aMediaType);
void GetSupportedAudioCodecs(const GUID** aCodecs, uint32_t* aNumCodecs);
HRESULT CreateBasicVideoFrame(IMFSample* aSample,
int64_t aTimestampUsecs,
int64_t aDurationUsecs,
int64_t aOffsetBytes,
VideoData** aOutVideoData);
HRESULT CreateD3DVideoFrame(IMFSample* aSample,
int64_t aTimestampUsecs,
int64_t aDurationUsecs,
int64_t aOffsetBytes,
VideoData** aOutVideoData);
// Attempt to initialize DXVA. Returns true on success.
bool InitializeDXVA();
// Notifies the MediaDecoder of the number of bytes we have consumed
// since last time we called this. We call this once per call to
// DecodeVideoFrame() and/or DecodeAudioData().
void NotifyBytesConsumed();
RefPtr<IMFSourceReader> mSourceReader;
RefPtr<WMFByteStream> mByteStream;
RefPtr<WMFSourceReaderCallback> mSourceReaderCallback;
nsAutoPtr<DXVA2Manager> mDXVA2Manager;
// Region inside the video frame that makes up the picture. Pixels outside
// of this region should not be rendered.
nsIntRect mPictureRegion;
uint32_t mAudioChannels;
uint32_t mAudioBytesPerSample;
uint32_t mAudioRate;
uint32_t mVideoWidth;
uint32_t mVideoHeight;
uint32_t mVideoStride;
// The offset, in audio frames, at which playback started since the
// last discontinuity.
int64_t mAudioFrameOffset;
// The number of audio frames that we've played since the last
// discontinuity.
int64_t mAudioFrameSum;
// True if we need to re-initialize mAudioFrameOffset and mAudioFrameSum
// from the next audio packet we decode. This happens after a seek, since
// WMF doesn't mark a stream as having a discontinuity after a seek(0).
bool mMustRecaptureAudioPosition;
bool mHasAudio;
bool mHasVideo;
bool mUseHwAccel;
// We can't call WMFDecoder::IsMP3Supported() on non-main threads, since it
// checks a pref, so we cache its value in mIsMP3Enabled and use that on
// the decode thread.
const bool mIsMP3Enabled;
bool mCOMInitialized;
};
} // namespace mozilla
#endif