unityframecapturer.h

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/********************************************************************************************
* Twitch Broadcasting SDK
*
* This software is supplied under the terms of a license agreement with Twitch Interactive, Inc. and
* may not be copied or used except in accordance with the terms of that agreement
* Copyright (c) 2012-2016 Twitch Interactive, Inc.
*********************************************************************************************/

#pragma once

#include "twitchsdk/broadcast/framecapturer.h"

namespace ttv
{
    class BindingFrameCapturer;

    // Event types for UnitySetGraphicsDevice
    // NOTE: don't change these since they line up with Unity's events
    namespace GfxDeviceEventType
    {
        enum Enum
        {
            kGfxDeviceEventInitialize = 0,
            kGfxDeviceEventShutdown,
            kGfxDeviceEventBeforeReset,
            kGfxDeviceEventAfterReset
        };
    }
    
    namespace broadcast
    {
        class BroadcastAPI;
    }
}


class ttv::BindingFrameCapturer
{
public:
    BindingFrameCapturer();
    virtual ~BindingFrameCapturer();

    virtual void SetGraphicsDevice(void* device, GfxDeviceEventType::Enum eventType);
    virtual TTV_ErrorCode SetBroadcastController(ttv::broadcast::BroadcastAPI* broadcastController);
    virtual TTV_ErrorCode Start(const TTV_VideoParams* videoParams, const TTV_AudioParams* audioParams, const TTV_IngestServer* ingestServer, uint32_t flags);
    virtual TTV_ErrorCode Stop();
    virtual TTV_ErrorCode PauseFrameSubmission();
    virtual TTV_ErrorCode ResumeFrameSubmission();
    virtual TTV_ErrorCode SubmitTexture(void* p, int width, int height) = 0;
    virtual void Shutdown();
    virtual void PreDeviceReset();
    virtual void PostDeviceReset();
    virtual bool RequiresVerticalFlip();

    bool GetIsStarted() const { return mStarted; }
    ttv::broadcast::BroadcastAPI* GetBroadcastController(){ return mBroadcastController; }
    
protected:
    static void BufferUnlockCallback(const uint8_t* buffer, void* userData);

    virtual bool ShouldCreateFrameBuffers() const;
    virtual void HandleBufferUnlock(const uint8_t* buffer);
    virtual void CleanupObjects();
    virtual TTV_ErrorCode SubmitVideoFrame(const uint8_t* frameBuffer,TTV_BufferUnlockCallback callback, void* userData);

    typedef std::vector<uint8_t*> BufferList;

    BufferList mAllFrameBuffers;
    BufferList mFreeFrameBuffers;
    TTV_VideoParams mVideoParams;
    bool mStarted;
    ttv::broadcast::BroadcastAPI* mBroadcastController;
    
    static const size_t kNumBuffers = 3;
};