/**

 *

 * Lame ACM wrapper, encode/decode MP3 based RIFF/AVI files in MS Windows

 *

 *  Copyright (c) 2002 Steve Lhomme <steve.lhomme at free.fr>

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * This library 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

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 *

 */

/*!

	\author Steve Lhomme

	\version \$Id: DecodeStream.cpp,v 1.3 2002/01/25 17:51:42 robux4 Exp $

*/

#if !defined(STRICT)

#define STRICT

#endif // STRICT

#include <assert.h>

#include <windows.h>

#ifdef ENABLE_DECODING

#include "adebug.h"

#include "DecodeStream.h"

// static methods

DecodeStream * DecodeStream::Create()

{

	DecodeStream * Result;

	Result = new DecodeStream;

	return Result;

}

const bool DecodeStream::Erase(const DecodeStream * a_ACMStream)

{

	delete a_ACMStream;

	return true;

}

// class methods

DecodeStream::DecodeStream() :

 m_WorkingBufferUseSize(0),

 gfp(NULL)

{

	 /// \todo get the debug level from the registry

my_debug = new ADbg(DEBUG_LEVEL_CREATION);

	if (my_debug != NULL) {

		unsigned char DebugFileName[512];

		my_debug->setPrefix("MPG123stream"); /// \todo get it from the registry

my_debug->setIncludeTime(true);  /// \todo get it from the registry

// Check in the registry if we have to Output Debug information

DebugFileName[0] = '\0';

		HKEY OssKey;

		if (RegOpenKeyEx( HKEY_LOCAL_MACHINE, "SOFTWARE\\MUKOLI", 0, KEY_READ , &OssKey ) == ERROR_SUCCESS) {

			DWORD DataType;

			DWORD DebugFileNameSize = 512;

			if (RegQueryValueEx( OssKey, "DebugFile", NULL, &DataType, DebugFileName, &DebugFileNameSize ) == ERROR_SUCCESS) {

				if (DataType == REG_SZ) {

					my_debug->setUseFile(true);

					my_debug->setDebugFile((char *)DebugFileName);

					my_debug->OutPut("Debug file is %s",(char *)DebugFileName);

				}

			}

		}

		my_debug->OutPut(DEBUG_LEVEL_FUNC_START, "DecodeStream Creation (0X%08X)",this);

	}

	else {

		ADbg debug;

		debug.OutPut("DecodeStream::ACMACMStream : Impossible to create my_debug");

	}

}

DecodeStream::~DecodeStream()

{

//	lame_close( gfp );

	if (my_debug != NULL)

	{

		my_debug->OutPut(DEBUG_LEVEL_FUNC_START, "DecodeStream Deletion (0X%08X)",this);

		delete my_debug;

	}

}

bool DecodeStream::init(const int nSamplesPerSec, const int nChannels, const int nAvgBytesPerSec, const int nSourceBitrate)

{

	bool bResult = false;

	my_SamplesPerSec  = nSamplesPerSec;

	my_Channels       = nChannels;

	my_AvgBytesPerSec = nAvgBytesPerSec;

	my_SourceBitrate  = nSourceBitrate;

	bResult = true;

	return bResult;

}

bool DecodeStream::open()

{

	bool bResult = false;

	bResult = bool(InitMP3(&my_DecodeData) != 0);

	return bResult;

}

bool DecodeStream::close(LPBYTE pOutputBuffer, DWORD *pOutputSize)

{

	bool bResult = false;

/*

	int nOutputSamples = 0;

    nOutputSamples = lame_encode_flush( gfp, pOutputBuffer, 0 );

	if ( nOutputSamples < 0 )

	{

		// BUFFER_TOO_SMALL

		*pOutputSize = 0;

	}

	else

	{

		*pOutputSize = nOutputSamples;

		bResult = true;

	}

/*

	// lame will be close in VbrWriteTag function

	if ( !lame_get_bWriteVbrTag( gfp ) )

	{

		// clean up of allocated memory

		lame_close( gfp );

	}

*/

	ExitMP3(&my_DecodeData);

	bResult = true;

	return bResult;

}

DWORD DecodeStream::GetOutputSizeForInput(const DWORD the_SrcLength) const

{

	DWORD Result;

	double OutputInputRatio = double(my_SamplesPerSec * 2 * my_Channels) / double(my_SourceBitrate);

	OutputInputRatio *= 1.15; // allow 15% more

	Result = DWORD(double(the_SrcLength) * OutputInputRatio);

	my_debug->OutPut(DEBUG_LEVEL_FUNC_CODE, "Result = %d (OutputInputRatio = %f)",Result,OutputInputRatio);

	return Result;

}

bool DecodeStream::ConvertBuffer(LPACMDRVSTREAMHEADER a_StreamHeader)

{

	bool result = false;

if (my_debug != NULL)

{

my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "enter DecodeStream::ConvertBuffer");

}

	int ProcessedBytes;

	int ret = decodeMP3(&my_DecodeData, a_StreamHeader->pbSrc, a_StreamHeader->cbSrcLength, (char *)a_StreamHeader->pbDst, a_StreamHeader->cbDstLength, &ProcessedBytes);

	switch (ret)

	{

	    case MP3_OK:

			a_StreamHeader->cbSrcLengthUsed = a_StreamHeader->cbSrcLength;

			a_StreamHeader->cbDstLengthUsed = ProcessedBytes;

			result = true;

			break;

	    case MP3_NEED_MORE:

			a_StreamHeader->cbSrcLengthUsed = 0;

	a_StreamHeader->cbDstLengthUsed = 0;

			break;

	    case MP3_ERR:

			break;

	}

/*

	DWORD InSize = a_StreamHeader->cbSrcLength / 2, OutSize = a_StreamHeader->cbDstLength; // 2 for 8<->16 bits

// Encode it

int dwSamples;

	int nOutputSamples = 0;

	dwSamples = InSize / lame_get_num_channels( gfp );

	if ( 1 == lame_get_num_channels( gfp ) )

	{

		nOutputSamples = lame_encode_buffer(gfp,(PSHORT)a_StreamHeader->pbSrc,(PSHORT)a_StreamHeader->pbSrc,dwSamples,a_StreamHeader->pbDst,a_StreamHeader->cbDstLength);

	}

	else

	{

		nOutputSamples = lame_encode_buffer_interleaved(gfp,(PSHORT)a_StreamHeader->pbSrc,dwSamples,a_StreamHeader->pbDst,a_StreamHeader->cbDstLength);

	}

	a_StreamHeader->cbSrcLengthUsed = a_StreamHeader->cbSrcLength;

	a_StreamHeader->cbDstLengthUsed = nOutputSamples;

	result = a_StreamHeader->cbDstLengthUsed <= a_StreamHeader->cbDstLength;

*/

	my_debug->OutPut(DEBUG_LEVEL_FUNC_CODE, "UsedSize = %d / EncodedSize = %d, result = %d, ret = %s", a_StreamHeader->cbSrcLengthUsed, a_StreamHeader->cbDstLengthUsed, result,

		(ret == MP3_OK)?"MP3_OK":(ret == MP3_NEED_MORE)?"MP3_NEED_MORE":"error");

if (my_debug != NULL)

{

my_debug->OutPut(DEBUG_LEVEL_FUNC_DEBUG, "DecodeStream::ConvertBuffer result = %d",result);

}

	return result;

}

#endif // ENABLE_DECODING