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Step 4: Create the Media Session

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This topic is step 4 of the tutorial How to Play Media Files with Media Foundation. The complete code is shown in the topic Media Session Playback Example.

The CPlayer::CreateSession creates a new instance of the Media Session.

//  Create a new instance of the media session.
HRESULT CPlayer::CreateSession()
{
    // Close the old session, if any.
    HRESULT hr = CloseSession();
    if (FAILED(hr))
    {
        goto done;
    }

    assert(m_state == Closed);

    // Create the media session.
    hr = MFCreateMediaSession(NULL, &m_pSession);
    if (FAILED(hr))
    {
        goto done;
    }

    // Start pulling events from the media session
    hr = m_pSession->BeginGetEvent((IMFAsyncCallback*)this, NULL);
    if (FAILED(hr))
    {
        goto done;
    }

    m_state = Ready;

done:
    return hr;
}

This method performs the following steps:

  1. Calls CPlayer::CloseSession to close any previous instance of the Media Session.
  2. Calls MFCreateMediaSession to create a new instance of the Media Session.
  3. Calls the IMFMediaEventGenerator::BeginGetEvent method to request the next event from the Media Session. The first parameter to BeginGetEvent is a pointer to the CPlayer object itself, which implements the IMFAsyncCallback interface.

Event handling is described in step 5.

Next: Step 5: Handle Media Session Events

Audio/Video Playback

How to Play Media Files with Media Foundation