/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011 Cyan Worlds, Inc.

This program 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.

This program 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 this program. If not, see <http://www.gnu.org/licenses/>.

Additional permissions under GNU GPL version 3 section 7

If you modify this Program, or any covered work, by linking or
combining it with any of RAD Game Tools Bink SDK, Autodesk 3ds Max SDK,
NVIDIA PhysX SDK, Microsoft DirectX SDK, OpenSSL library, Independent
JPEG Group JPEG library, Microsoft Windows Media SDK, or Apple QuickTime SDK
(or a modified version of those libraries),
containing parts covered by the terms of the Bink SDK EULA, 3ds Max EULA,
PhysX SDK EULA, DirectX SDK EULA, OpenSSL and SSLeay licenses, IJG
JPEG Library README, Windows Media SDK EULA, or QuickTime SDK EULA, the
licensors of this Program grant you additional
permission to convey the resulting work. Corresponding Source for a
non-source form of such a combination shall include the source code for
the parts of OpenSSL and IJG JPEG Library used as well as that of the covered
work.

You can contact Cyan Worlds, Inc. by email legal@cyan.com
 or by snail mail at:
      Cyan Worlds, Inc.
      14617 N Newport Hwy
      Mead, WA   99021

*==LICENSE==*/

#include "hsConfig.h"

#if HS_BUILD_FOR_WIN32
#define WIN32_EXTRA_LEAN
#define WIN32_LEAN_AND_MEAN
#ifndef _WINDOWS_H_	// redundant include guard to minimize compile times
#define _WINDOWS_H_
#include <windows.h>
#endif // _WINDOWS_H_
#include "vfw.h"
#endif // HS_BUILD_FOR_WIN32

#include "hsTypes.h"
#include "plLayerAVI.h"
#include "../plGImage/plMipmap.h"

#if HS_BUILD_FOR_WIN32
class plAVIFileInfo
{
public:
	plAVIFileInfo() : fAVIStream(nil), fGetFrame(0) {}
	IAVIStream*					fAVIStream;
	AVISTREAMINFO				fAVIStreamInfo;
	PGETFRAME					fGetFrame;      // Where in the stream to get the next frame
};
#else // HS_BUILD_FOR_WIN32
struct plAVIFileInfo
{
};
#endif // HS_BUILD_FOR_WIN32

static hsBool						ICopySourceToTexture24(BITMAPINFO* bmi, plMipmap* t);
static hsBool						ICopySourceToTexture16(BITMAPINFO* bmi, plMipmap* t);


plLayerAVI::plLayerAVI()
{
	fAVIInfo = TRACKED_NEW plAVIFileInfo;
}

plLayerAVI::~plLayerAVI()
{
	ICloseMovie();

	delete fAVIInfo;
}


hsBool plLayerAVI::IInit()
{
#if HS_BUILD_FOR_WIN32
	int ret = AVIStreamOpenFromFile( &fAVIInfo->fAVIStream, 
								fMovieName,													
								streamtypeVIDEO, 
								0, 
								OF_READ,
								NULL);

	if (ret)
		return ISetFault("Error opening AVI");

	if( !(fAVIInfo->fGetFrame = AVIStreamGetFrameOpen(fAVIInfo->fAVIStream, NULL)) )
		return ISetFault("Error positioning AVI");

	if( AVIStreamInfo(fAVIInfo->fAVIStream, &fAVIInfo->fAVIStreamInfo, sizeof(AVISTREAMINFO)) )
		return ISetFault("Error getting AVI info");

	BITMAPINFO* bmi;
	if( !(bmi = (BITMAPINFO*)AVIStreamGetFrame(fAVIInfo->fGetFrame, fCurrentFrame >= 0 ? fCurrentFrame : 0)) )
		return ISetFault("Can't get first frame");
	ISetSize(bmi->bmiHeader.biWidth, bmi->bmiHeader.biHeight);

	Int32 endFrame = fAVIInfo->fAVIStreamInfo.dwLength-1;
	hsScalar length = float(endFrame) * float(fAVIInfo->fAVIStreamInfo.dwScale) 
						/ float(fAVIInfo->fAVIStreamInfo.dwRate);
	ISetLength(length);
#endif

	return false;
}

Int32 plLayerAVI::ISecsToFrame(hsScalar secs)
{
	float timeScale = float(fAVIInfo->fAVIStreamInfo.dwRate) / float(fAVIInfo->fAVIStreamInfo.dwScale);
	return Int32(secs * timeScale + 0.5f);
}

hsBool plLayerAVI::IGetCurrentFrame()
{
	if( !fAVIInfo->fAVIStream )
		IInit();

	ICheckBitmap();
	
	BITMAPINFO* bmi;
	if( !(bmi = (BITMAPINFO*)AVIStreamGetFrame(fAVIInfo->fGetFrame, fCurrentFrame)) )
		return ISetFault("Can't get frame");

	switch(bmi->bmiHeader.biBitCount)
	{
	case 16:
		return ICopySourceToTexture16(bmi, plMipmap::ConvertNoRef(GetTexture()));
		break;
	case 24:
		return ICopySourceToTexture24(bmi, plMipmap::ConvertNoRef(GetTexture()));
		break;
	default:
		return ISetFault("Unknown AVI color depth");
	}
	return true;
}

static hsBool ICopySourceToTexture16(BITMAPINFO* bmi, plMipmap* b)
{
	hsAssert( b != nil, "nil mipmap passed to ICopySourceToTexture16()" );

	UInt16* pSrc = (UInt16*)( bmi->bmiHeader.biSize + (BYTE*)bmi );

	UInt32* pix = (UInt32*)b->GetImage();
	pix += b->GetWidth() * b->GetHeight();

	int width = bmi->bmiHeader.biWidth;
	int height = bmi->bmiHeader.biHeight;

	int useHeight = hsMinimum(height, b->GetHeight());
	int useWidth = hsMinimum(width, b->GetWidth());
	int i;
	for( i = 0; i < useHeight; i++ )
	{
		UInt16* src = pSrc;
		pSrc += width;

		pix -= b->GetWidth();
		UInt32* tPix = pix;
		int j;
		for( j = 0; j < useWidth; j++ )
		{
			*tPix = ((*src & 0x001f) << 3) // up 3 
				| ((*src & 0x03e0) << 6) // down 5 up 3 up 8
				| ((*src & 0x7c00) << 9) // down 10 up 3 up 16
				| (0xff << 24); // alpha
			src++;
			++tPix;
		}
	}
	
	return false;
}

static hsBool ICopySourceToTexture24(BITMAPINFO* bmi, plMipmap* b)
{
	hsAssert( b != nil, "nil mipmap passed to ICopySourceToTexture24()" );

	unsigned char* pSrc = (unsigned char*)( bmi->bmiHeader.biSize + (BYTE*)bmi );

	hsRGBAColor32* pix = (hsRGBAColor32*)b->GetImage();
	pix += b->GetWidth() * b->GetHeight();

	int width = bmi->bmiHeader.biWidth;
	int height = bmi->bmiHeader.biHeight;

	int useHeight = hsMinimum(height, b->GetHeight());
	int useWidth = hsMinimum(width, b->GetWidth());
	int i;

	for( i = 0; i < useHeight; i++ )
	{
		unsigned char* src = pSrc;
		pSrc += width * 3;

		pix -= b->GetWidth();
		hsRGBAColor32* tPix = pix;
		int j;
		for( j = 0; j < useWidth; j++ )
		{
			tPix->b = *src++;
			tPix->g = *src++;
			tPix->r = *src++;
			++tPix;
		}
	}
	
	return false;
}

hsBool plLayerAVI::ICloseMovie()
{
	if( fAVIInfo->fGetFrame )
		AVIStreamGetFrameClose(fAVIInfo->fGetFrame);
	fAVIInfo->fGetFrame = 0;

	if( fAVIInfo->fAVIStream )
		AVIStreamRelease(fAVIInfo->fAVIStream);

	fAVIInfo->fAVIStream = nil;

	return false;
}

hsBool plLayerAVI::IRelease()
{
	ICloseMovie();

	return false;
}