CaptureFrameGrabber.h

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//*@@@+++@@@@******************************************************************
//
// Microsoft Windows Media Foundation
// Copyright (C) Microsoft Corporation. All rights reserved.
//
// Portions Copyright (c) Microsoft Open Technologies, Inc. 
//
//*@@@---@@@@******************************************************************
 
#pragma once
 
#include "MFIncludes.h"
 
 
namespace Media {
 
class MediaSink;
 
enum class CaptureStreamType
{
    Preview = 0,
    Record
};
 
ref class CaptureFrameGrabber sealed
{
public:
 
    // IClosable
    virtual ~CaptureFrameGrabber();
 
    void ShowCameraSettings();
 
internal:
 
    static concurrency::task<CaptureFrameGrabber^> CreateAsync(_In_ WMC::MediaCapture^ capture, _In_ WMMp::VideoEncodingProperties^ props)
    {
        return CreateAsync(capture, props, CaptureStreamType::Preview);
    }
 
    static concurrency::task<CaptureFrameGrabber^> CreateAsync(_In_ WMC::MediaCapture^ capture, _In_ WMMp::VideoEncodingProperties^ props, CaptureStreamType streamType);
 
    concurrency::task<MW::ComPtr<IMF2DBuffer2>> GetFrameAsync();
    concurrency::task<void> FinishAsync();
 
private:
 
    CaptureFrameGrabber(_In_ WMC::MediaCapture^ capture, _In_ WMMp::VideoEncodingProperties^ props, CaptureStreamType streamType);
 
    void ProcessSample(_In_ MediaSample^ sample);
 
    Platform::Agile<WMC::MediaCapture> _capture;
    ::Windows::Media::IMediaExtension^ _mediaExtension;
 
    MW::ComPtr<MediaSink> _mediaSink;
 
    CaptureStreamType _streamType;
 
    enum class State
    {
        Created,
        Started,
        Closing,
        Closed
    } _state;
 
    std::queue<concurrency::task_completion_event<MW::ComPtr<IMF2DBuffer2>>> _videoSampleRequestQueue;
    AutoMF _mf;
    MWW::SRWLock _lock;
};
 
}