// Copyright (c) 2006, Rodrigo Braz Monteiro, Mike Matsnev
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//   * Redistributions of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
//   * Redistributions in binary form must reproduce the above copyright notice,
//     this list of conditions and the following disclaimer in the documentation
//     and/or other materials provided with the distribution.
//   * Neither the name of the Aegisub Group nor the names of its contributors
//     may be used to endorse or promote products derived from this software
//     without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// -----------------------------------------------------------------------------
//
// AEGISUB
//
// Website: http://aegisub.cellosoft.com
// Contact: mailto:zeratul@cellosoft.com
//


///////////
// Headers
#include <wx/wxprec.h>
#include "setup.h"
#ifdef __WINDOWS__
#if USE_DIRECTSHOW == 1
#pragma warning(disable: 4995)
#include <wx/image.h>
#include <windows.h>
#include <tchar.h>
#include <initguid.h>
#include "video_provider_dshow.h"
#include "utils.h"
#include "vfr.h"

// CLSID for videosink: {F13D3732-96BD-4108-AFEB-E85F68FF64DC}
DEFINE_GUID(CLSID_VideoSink, 0xf13d3732, 0x96bd, 0x4108, 0xaf, 0xeb, 0xe8, 0x5f, 0x68, 0xff, 0x64, 0xdc);


///////////////
// Constructor
// Based on Haali's code for DirectShowSource2
DirectShowVideoProvider::DirectShowVideoProvider(wxString _filename, wxString _subfilename) {
	m_hFrameReady = CreateEvent(NULL, FALSE, FALSE, NULL);
	OpenVideo(_filename);
}


//////////////
// Destructor
DirectShowVideoProvider::~DirectShowVideoProvider() {
}


////////////
// Get pin
// Code by Haali
#define ENUM_FILTERS(graph, var) for (CComPtr<IEnumFilters> __pEF__; !__pEF__ && SUCCEEDED(graph->EnumFilters(&__pEF__)); ) for (CComPtr<IBaseFilter> var; __pEF__->Next(1, &var, NULL) == S_OK; var.Release())
#define ENUM_PINS(filter, var) for (CComPtr<IEnumPins> __pEP__; !__pEP__ && SUCCEEDED(filter->EnumPins(&__pEP__)); ) for (CComPtr<IPin> var; __pEP__->Next(1, &var, NULL) == S_OK; var.Release())

class MTPtr {
  AM_MEDIA_TYPE *pMT;

  MTPtr(const MTPtr&);
  MTPtr& operator=(const MTPtr&);
public:
  MTPtr() : pMT(NULL) { }
  ~MTPtr() { DeleteMediaType(pMT); }

  AM_MEDIA_TYPE *operator->() { return pMT; }
  const AM_MEDIA_TYPE *operator->() const { return pMT; }
  operator AM_MEDIA_TYPE *() { return pMT; }
  AM_MEDIA_TYPE **operator&() { DeleteMediaType(pMT); pMT = NULL; return &pMT; }

  static void FreeMediaType(AM_MEDIA_TYPE *pMT) {
    if (pMT == NULL)
      return;
    if (pMT->cbFormat > 0) {
      CoTaskMemFree(pMT->pbFormat);
      pMT->pbFormat = NULL;
      pMT->cbFormat = 0;
    }
    if (pMT->pUnk) {
      pMT->pUnk->Release();
      pMT->pUnk = NULL;
    }
  }

  static void  DeleteMediaType(AM_MEDIA_TYPE *pMT) {
    if (pMT == NULL)
      return;
    if (pMT->cbFormat > 0)
      CoTaskMemFree(pMT->pbFormat);
    if (pMT->pUnk)
      pMT->pUnk->Release();
    CoTaskMemFree(pMT);
  }
};

#define ENUM_MT(pin, var) for (CComPtr<IEnumMediaTypes> __pEMT__; !__pEMT__ && SUCCEEDED(pin->EnumMediaTypes(&__pEMT__)); ) for (MTPtr var; __pEMT__->Next(1, &var, NULL) == S_OK; )

CComPtr<IPin> GetPin(IBaseFilter *pF, bool include_connected, PIN_DIRECTION dir, const GUID *pMT = NULL) {
  if (pF == NULL)
    return CComPtr<IPin>();

  ENUM_PINS(pF, pP) {
    PIN_DIRECTION     pd;
    if (FAILED(pP->QueryDirection(&pd)))
      continue;
    if (pd == dir) {
      if (!include_connected) {
	CComPtr<IPin> pQ;
	if (SUCCEEDED(pP->ConnectedTo(&pQ)))
	  continue;
      }
      if (pMT == NULL)
	return pP;

      ENUM_MT(pP, MT)
	if (MT->majortype == *pMT)
          return pP;
    }
  }

  return CComPtr<IPin>();
}


////////////////////
// More Haali stuff
void DirectShowVideoProvider::RegROT() {
	if (!m_pGC || m_registered)
	  return;

	CComPtr<IRunningObjectTable>  rot;
	if (FAILED(GetRunningObjectTable(0, &rot)))
	  return;

	CStringA  name;
	name.Format("FilterGraph %08p pid %08x (avss)", m_pGC.p, GetCurrentProcessId());

	CComPtr<IMoniker>		  mk;
	if (FAILED(CreateItemMoniker(L"!", CA2W(name), &mk)))
	  return;

	if (SUCCEEDED(rot->Register(ROTFLAGS_REGISTRATIONKEEPSALIVE, m_pGC, mk, &m_rot_cookie)))
	  m_registered = true;
}

void DirectShowVideoProvider::UnregROT() {
	if (!m_registered)
	  return;

	CComPtr<IRunningObjectTable>  rot;
	if (FAILED(GetRunningObjectTable(0, &rot)))
	  return;

	if (SUCCEEDED(rot->Revoke(m_rot_cookie)))
	  m_registered = false;
}



//////////////
// Open video
HRESULT DirectShowVideoProvider::OpenVideo(wxString _filename) {
	HRESULT hr;

	// Create an instance of the Filter Graph
	CComPtr<IGraphBuilder> pG;
	if (FAILED(hr = pG.CoCreateInstance(CLSID_FilterGraph))) return hr;

	// Create an Instance of the Video Sink
	CComPtr<IBaseFilter> pR;
	CLSID CLSID_VideoSink;
	CLSIDFromString(L"{F13D3732-96BD-4108-AFEB-E85F68FF64DC}",&CLSID_VideoSink);
	if (FAILED(hr = pR.CoCreateInstance(CLSID_VideoSink))) return hr;

	// Add VideoSink to graph
	pG->AddFilter(pR, L"VideoSink");

	// Create instance of sink (??)
	CComQIPtr<IVideoSink> sink(pR);
	if (!sink) return E_NOINTERFACE;

	// Create another instance of sink (??)
	CComQIPtr<IVideoSink2> sink2(pR);
	if (!sink2) return E_NOINTERFACE;

	// Set allowed types for sink
	sink->SetAllowedTypes(IVS_RGB32|IVS_YV12|IVS_YUY2);

	// I have no clue
	ResetEvent(m_hFrameReady);
	sink2->NotifyFrame(m_hFrameReady);

	// Create source filter and add it to graph
	CComPtr<IBaseFilter> pS;
	if (FAILED(hr = pG->AddSourceFilter(_filename.wc_str(), NULL, &pS))) return hr;

	// Property bag? The heck is this?
	// Is this supposed to make it "interactive", enabling some actions?
	// I have no clue.
	CComQIPtr<IPropertyBag> pPB(pS);
	if (pPB) pPB->Write(L"ui.interactive", &CComVariant(0u, VT_UI4));

	// Get source's output pin
	CComPtr<IPin> pO(GetPin(pS, false, PINDIR_OUTPUT, &MEDIATYPE_Video));
	if (!pO) pO = GetPin(pS, false, PINDIR_OUTPUT, &MEDIATYPE_Stream);

	// Get sink's input pin
	CComPtr<IPin> pI(GetPin(pR, false, PINDIR_INPUT));

	// Check if pins are ok
	if (!pO || !pI) return E_FAIL;

	// Connect pins
	if (FAILED(hr = pG->Connect(pO, pI))) return hr;

	// Add control stuff to graph
	CComQIPtr<IMediaControl>  mc(pG);
	CComQIPtr<IMediaSeeking>  ms(pG);

	// See if they were created correctly
	if (!mc || !ms) return E_NOINTERFACE;

	// Run MediaControl, initiating the data flow through it
	if (FAILED(hr = mc->Run())) return hr;

	// Get state from media seeking (??)
	OAFilterState fs;
	if (FAILED(hr = mc->GetState(2000, &fs))) return hr;

	// Wait up to 5 seconds for the first frame to arrive
	if (WaitForSingleObject(m_hFrameReady, 5000) != WAIT_OBJECT_0) return E_FAIL;

	// Get frame format
	long long defd;
	unsigned type, arx, ary;
	if (FAILED(hr = sink2->GetFrameFormat(&type, &width, &height, &arx, &ary, &defd))) return hr;

	// Get video duration
	REFERENCE_TIME  duration;
	if (FAILED(hr = ms->GetDuration(&duration))) return hr;

	// Length of each frame? (??)
	if (defd == 0) defd = 400000;

	// No clue, either
	int avgf = 0;
	if (avgf > 0) defd = avgf;

	// Set pixel type
	//switch (type) {
	//	case IVS_RGB32: m_vi.pixel_type = VideoInfo::CS_BGR32; break;
	//	case IVS_YUY2: m_vi.pixel_type = VideoInfo::CS_YUY2; break;
	//	case IVS_YV12: m_vi.pixel_type = VideoInfo::CS_YV12; break;
	//	default: return E_FAIL;
	//}

	// Set number of frames and fps
	num_frames = duration / defd;
	fps = double(10000000) / double(defd);

	// Set frame length
	//m_avgframe = defd;

	// Store filters
	m_pR = sink;
	m_pGC = mc;
	m_pGS = ms;

	// Flag frame as ready?
	SetEvent(m_hFrameReady);

	// No idea
	RegROT();

	// Set frame count
	//m_f.SetCount(m_vi.num_frames);
	return hr;
}


////////////////
// Refresh subs
void DirectShowVideoProvider::RefreshSubtitles() {
}


///////////
// Set DAR
void DirectShowVideoProvider::SetDAR(double _dar) {
}


////////////
// Set Zoom
void DirectShowVideoProvider::SetZoom(double _zoom) {
}


///////////////////
// Get float frame
void DirectShowVideoProvider::GetFloatFrame(float* Buffer, int n) {
}


#endif
#endif