From fea03e59c2570baaaef6dfaf01cd3ee095402e1e Mon Sep 17 00:00:00 2001
From: Michał Cichoń <michcic@gmail.com>
Date: Sat, 5 Dec 2015 14:27:47 +0100
Subject: Add player based on Windows Media Foundation.

---
 src/player/backends/media_foundation.h | 115 +++++++++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 src/player/backends/media_foundation.h

(limited to 'src/player/backends/media_foundation.h')

diff --git a/src/player/backends/media_foundation.h b/src/player/backends/media_foundation.h
new file mode 100644
index 0000000..cf10122
--- /dev/null
+++ b/src/player/backends/media_foundation.h
@@ -0,0 +1,115 @@
+# ifndef __TD__BASIC_MEDIA_PLAYER_H__
+# define __TD__BASIC_MEDIA_PLAYER_H__
+# pragma once
+
+# include <mfapi.h>
+# include <mfidl.h>
+# include "utility/com_ptr.h"
+# include "utility/optional.h"
+
+class MediaPlayer;
+
+typedef void (*MediaPlayerEventCallback)(MediaPlayer* player, com_ptr<IMFMediaEvent>, MediaEventType);
+
+class MediaPlayer:
+    private IMFAsyncCallback
+{
+public:
+    enum State
+    {
+        Closed = 0,     // no session
+        Ready,          // session was created, ready to open file
+        OpenPending,    // session is opening a file
+        Started,        // session is playing a file
+        Paused,         // session is paused
+        Stopped,        // session is stopped (but ready to play)
+        Closing         // session was closed, waiting for async callback
+    };
+
+    static HRESULT Create(MediaPlayerEventCallback eventCallback, MediaPlayer** outMediaPlayer);
+
+    // IUnknown
+    virtual ULONG   STDMETHODCALLTYPE AddRef() override;
+    virtual ULONG   STDMETHODCALLTYPE Release() override;
+    virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID iid, void** object) override;
+
+    HRESULT OpenURL(const wchar_t* url);
+    HRESULT Play();
+    HRESULT Pause();
+    HRESULT Stop();
+    HRESULT Shutdown();
+
+    State GetState() const;
+
+    void  SetMasterVolume(float volume);
+    float GetMasterVolume() const;
+
+    void  SetReplayGain(float replayGain);
+    float GetReplayGain() const;
+
+    optional<float> GetPresentationTime() const;
+    optional<float> GetDuration() const;
+
+    void  SetUserData(void* userData);
+    void* GetUserData() const;
+
+    HRESULT HandleEvent(IMFMediaEvent* mediaEvent);
+
+protected:
+    MediaPlayer(MediaPlayerEventCallback eventCallback);
+    virtual ~MediaPlayer();
+
+    HRESULT Initialize();
+    HRESULT CreateSession();
+    HRESULT CloseSession();
+    HRESULT StartPlayback();
+    HRESULT ApplyTopology();
+
+    HRESULT ApplyMasterVolume(float volume);
+    HRESULT ApplyReplayGain(float replayGain);
+
+    const com_ptr<IMFMediaSession>& GetMediaSession() const { return m_MediaSession; }
+    const com_ptr<IMFMediaSource>&  GetMediaSource()  const { return m_MediaSource;  }
+
+    virtual HRESULT OnTopologyStatus(IMFMediaEvent* mediaEvent);
+    virtual HRESULT OnPresentationEnded(IMFMediaEvent* mediaEvent);
+    virtual HRESULT OnNewPresentation(IMFMediaEvent* mediaEvent);
+
+    // Override to handle additional session events.
+    virtual HRESULT OnSessionEvent(IMFMediaEvent* mediaEvent, MediaEventType mediaEventType);
+
+    virtual HRESULT OnStateChange(State state, State previousState);
+
+private:
+    // IMFAsyncCallback
+    virtual HRESULT STDMETHODCALLTYPE GetParameters(DWORD* flags, DWORD* queue);
+    virtual HRESULT STDMETHODCALLTYPE Invoke(IMFAsyncResult* asyncResult);
+
+    HRESULT                         SetState(State state);
+
+    ULONG                           m_RefCount;
+
+    com_ptr<IMFSourceResolver>      m_SourceResolver;
+    com_ptr<IUnknown>               m_CancelCookie;
+
+    com_ptr<IMFMediaSession>        m_MediaSession;
+    com_ptr<IMFMediaSource>         m_MediaSource;
+
+    com_ptr<IMFSimpleAudioVolume>   m_SimpleAudioVolume;
+    com_ptr<IMFPresentationClock>   m_PresentationClock;
+    com_ptr<IMFAudioStreamVolume>   m_StreamAudioVolume;
+    
+    optional<float>                 m_SetMasterVolume;
+    mutable float                   m_MasterVolume;
+    mutable float                   m_ReplayGain;
+
+    MediaPlayerEventCallback        m_EventCallback;
+
+    void*                           m_UserData;
+
+    State                           m_State;
+    HANDLE                          m_CloseEvent;
+};
+
+
+# endif // __TD__BASIC_MEDIA_PLAYER_H__
\ No newline at end of file
-- 
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