doubango/branches/2.0/doubango/tinyDSHOW/src/DSOutputStream.cxx

/*
* Copyright (C) 2010-2011 Mamadou Diop.
*
* Contact: Mamadou Diop <diopmamadou(at)doubango.org>
*	
* This file is part of Open Source Doubango Framework.
*
* DOUBANGO is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*	
* DOUBANGO is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*	
* You should have received a copy of the GNU General Public License
* along with DOUBANGO.
*
*/
#include <tinydshow/DSOutputStream.h>
#include <tinydshow/DSOutputFilter.h>
#include <tinydshow/DSUtils.h>

#include <iostream>

using namespace std;

#define DEFAULT_FPS	15

#define MEMCPY_WORKAROUND 1

// Overlay
#define OVERLAY 0
#define OVERLAY_TEXT TEXT("Press ESC to exit full screen mode")
#define OVERLAY_DURATION 3 // in seconds

DSOutputStream::DSOutputStream(HRESULT *phr, DSOutputFilter *pParent, LPCWSTR pPinName) 
: CSourceStream(_T("DSOutputStream"), phr, pParent, pPinName)
{
//#ifndef _WIN32_WCE
	CAutoLock cAutoLock(m_pFilter->pStateLock());
//#endif

	this->buffer = NULL;
	this->buffer_size = NULL;

	this->frameNumber = 0;
	this->frameLength = (1000)/DEFAULT_FPS;
	this->fps = DEFAULT_FPS;

	this->width = 352;
	this->height = 288;

	this->overlay = false;

	this->paintBuffer = NULL;
	this->paintDC = NULL;
	this->hDibSection = NULL;
	this->hObject = NULL;

	this->mutex = tsk_mutex_create();
}

DSOutputStream::~DSOutputStream()
{
	SAFE_DELETE_PTR(this->buffer);
	tsk_mutex_destroy(&this->mutex);
	// TODO : Is there anything to free ???
}

void DSOutputStream::setFps(int fps_)
{
	this->fps = fps_;
	this->frameLength = (1000)/this->fps;
}

void DSOutputStream::showOverlay(int value)
{
	if (value == 0){
		this->overlay = false;
	}
	this->overlay = (value > 0);
}

HRESULT DSOutputStream::setImageFormat(UINT width, UINT height)
{
	if ((this->width == width) && (this->height == height)) return S_FALSE;

	this->width = width;
	this->height = height;

	this->frameNumber = 0;

	return S_OK;
}

bool DSOutputStream::getImageFormat(UINT &width, UINT &height)
{
	width = this->width;
	height = this->height;
	return true;
}

HRESULT DSOutputStream::GetMediaType(CMediaType *pMediaType)
{
	HRESULT hr = S_OK;

	CAutoLock lock(m_pFilter->pStateLock());

	ZeroMemory(pMediaType, sizeof(CMediaType));

	VIDEOINFO *pvi = (VIDEOINFO *)pMediaType->AllocFormatBuffer(sizeof(VIDEOINFO));
	if (NULL == pvi) 
		return E_OUTOFMEMORY;
	
	ZeroMemory(pvi, sizeof(VIDEOINFO));
	
	pvi->bmiHeader.biCompression = BI_RGB;
	pvi->bmiHeader.biBitCount = 24;
	pvi->bmiHeader.biSize			= sizeof(BITMAPINFOHEADER);
	pvi->bmiHeader.biWidth			= this->width;
	pvi->bmiHeader.biHeight			= this->height;
	pvi->bmiHeader.biPlanes			= 1;
	pvi->bmiHeader.biSizeImage		= GetBitmapSize(&pvi->bmiHeader);
	pvi->bmiHeader.biClrImportant	= 0;

	// Frame rate
	pvi->AvgTimePerFrame			= DS_MILLIS_TO_100NS(1000/this->fps);
	
	SetRectEmpty(&(pvi->rcSource));	// we want the whole image area rendered.
	SetRectEmpty(&(pvi->rcTarget));	// no particular destination rectangle

	pMediaType->SetType(&MEDIATYPE_Video);
	pMediaType->SetFormatType(&FORMAT_VideoInfo);
	pMediaType->SetTemporalCompression(FALSE);

	pMediaType->SetSubtype(&MEDIASUBTYPE_RGB24);
	pMediaType->SetSampleSize(pvi->bmiHeader.biSizeImage);
		
	bitmapInfo.bmiHeader = pvi->bmiHeader;

	return hr;
}

HRESULT DSOutputStream::DecideBufferSize(IMemAllocator *pMemAlloc, ALLOCATOR_PROPERTIES *pProperties)
{
	CheckPointer(pMemAlloc, E_POINTER);
	CheckPointer(pProperties, E_POINTER);

	CAutoLock cAutoLock(m_pFilter->pStateLock());
	HRESULT hr = NOERROR;

	VIDEOINFO *pvi = (VIDEOINFO *) m_mt.Format();
	pProperties->cBuffers = 1;
	pProperties->cbBuffer = pvi->bmiHeader.biSizeImage;

	// Ask the allocator to reserve us some sample memory. NOTE: the function
	// can succeed (return NOERROR) but still not have allocated the
	// memory that we requested, so we must check we got whatever we wanted.
	ALLOCATOR_PROPERTIES Actual;
	hr = pMemAlloc->SetProperties(pProperties,&Actual);
	if(FAILED(hr)){
		return hr;
	}

	// Is this allocator unsuitable?
	if(Actual.cbBuffer < pProperties->cbBuffer)
	{
		return E_FAIL;
	}

	// Make sure that we have only 1 buffer (we erase the ball in the
	// old buffer to save having to zero a 200k+ buffer every time
	// we draw a frame)
	return NOERROR;
}

HRESULT DSOutputStream::OnThreadCreate()
{
#if OVERLAY
	hDibSection = CreateDIBSection(NULL, (BITMAPINFO *) &bitmapInfo, DIB_RGB_COLORS, &paintBuffer, NULL, 0);

	HDC hDC = GetDC(NULL);
	paintDC = CreateCompatibleDC(hDC);
	SetMapMode(paintDC, GetMapMode(hDC));
	SetBkMode(paintDC, TRANSPARENT);
	SetTextColor(paintDC, RGB(255,255,255));

	hObject = SelectObject(paintDC, hDibSection);
#endif

	return CSourceStream::OnThreadCreate();
}

HRESULT DSOutputStream::OnThreadDestroy()
{
#if OVERLAY
	if (paintDC) DeleteDC(paintDC); 
	if (hObject) DeleteObject(hObject);

	if (paintBuffer)
	{
		//delete[] paintBuffer; // will be done
		//paintBuffer = NULL;
	}
#endif
	return CSourceStream::OnThreadDestroy();
}

inline HRESULT DSOutputStream::DrawOverLay(void *pBuffer, long lSize)
{
	// called only #if OVERLAY
	CopyMemory(paintBuffer, pBuffer, lSize);

	// Draw the current frame
#ifdef _WIN32_WCE
	
#else
	if( !TextOut( paintDC, 0, 0, OVERLAY_TEXT, _tcslen( OVERLAY_TEXT ) ) ) return E_FAIL;
#endif
	
	CopyMemory(pBuffer, paintBuffer, lSize);

	return S_OK;
}

/*inline*/ void DSOutputStream::TransfertBuffer(void* src, void* dest, long lSize)
{
	__try
	{
#if MEMCPY_WORKAROUND
	//#ifdef _WIN32_WCE
			memmove(dest, src, lSize);
	/*#else
			unsigned char * pDst = (unsigned char *) dest;

			if(src){
				unsigned char const * pSrc = (unsigned char const *) src;
				for( register int i=0; ((i< lSize) && src); i++) *pDst++ = *pSrc++;
			}else{
				for( register int i=0; i< lSize; i++) *pDst++ = 0;
			}
	#endif*/
#else
		CopyMemory(dest, src, lSize); //BUGGY
#endif
	}
	__except(EXCEPTION_ACCESS_VIOLATION == GetExceptionCode())
	{
		//ZeroMemory(dest, sizeof(void*));
	}
}

HRESULT DSOutputStream::FillBuffer(IMediaSample *pSample)
{
	CheckPointer(pSample, E_POINTER);
	CAutoLock lock(m_pFilter->pStateLock());

	HRESULT hr;
	BYTE *pBuffer = NULL;
	long lSize;

	hr = pSample->GetPointer(&pBuffer);
	if (SUCCEEDED(hr))
	{
		lSize = pSample->GetSize();

		// Check that we're still using video
		//ASSERT(m_mt.formattype == FORMAT_VideoInfo);

		if (this->buffer)
		{
#if OVERLAY
			if (this->overlay)
			{
				DrawOverLay(this->buffer, lSize);
			}
#endif
			// Why try do not work, see: http://msdn2.microsoft.com/en-us/library/xwtb73ad(vs.80).aspx
			this->lockBuffer();
			this->TransfertBuffer(this->buffer, (void*)pBuffer, TSK_MIN(lSize, this->buffer_size));
			this->unlockBuffer();
		}
		else
		{
			// Avoid catching last image
			memset((void*)pBuffer, NULL, lSize);
		}

		REFERENCE_TIME rtStart = DS_MILLIS_TO_100NS(this->frameNumber * this->frameLength);
		REFERENCE_TIME rtStop  = rtStart + DS_MILLIS_TO_100NS(this->frameLength);
		
		this->frameNumber++;

		pSample->SetTime(&rtStart, &rtStop);
		//pSample->SetMediaTime(&rtStart, &rtStop);
 		pSample->SetActualDataLength(lSize);
 		pSample->SetPreroll(FALSE);
 		pSample->SetDiscontinuity(FALSE);
	}

	// Set TRUE on every sample for uncompressed frames (KEYFRAME)
	pSample->SetSyncPoint(TRUE);

	return S_OK;
}