dh263gob.cpp

这是G.723和G.729的音频编解码的源代码

#include "stdafx.h"
#include "color.h"
#include "DBitstream.h"
#include "sactable.h"
#include "sad.h"
#include "Dh263class.h"

DH263GOB::DH263GOB(void)
{
	GOBBits.TotalBits=0;
	GOBBits.GBSCBits=17;
	GOBBits.GNBits=5;
	GOBBits.GLCIBits=2;
	GOBBits.GFIDBits=2;
	GOBBits.GQUANTBits=5;
}

int DH263GOB::DecodeGOBHeader(BOOL CPM,DBitStream *InputStream)
{	
	do
		{GOBInfo.GBSC=InputStream->ReadVarible(GOBBits.GBSCBits);
		 if (GOBInfo.GBSC==GOB_GBSC)
			{InputStream->FlushBits(GOBBits.GBSCBits);
			 break;
			}
		 else 
			 InputStream->FlushBits(1);
		}while (1);

	GOBInfo.GroupNumber=InputStream->GetVarible(GOBBits.GNBits);
	if (CPM)
		GOBInfo.GLCI=InputStream->GetVarible(GOBBits.GLCIBits);
	GOBInfo.GFID=InputStream->GetVarible(GOBBits.GFIDBits);
	GOBInfo.GQUANT=InputStream->GetVarible(GOBBits.GQUANTBits);

	return GOBInfo.GroupNumber;
}