www.pudn.com > IP_phone.rar > Compress.cpp

/**********************************************************/ 
/*类名：CCompress                                         */ 
/*简述：分装G.729压缩接口                                 */ 
/**********************************************************/ 
// Compress.cpp: implementation of the CCompress class. 
// 
////////////////////////////////////////////////////////////////////// 
 
#include "stdafx.h" 
#include "../NC_Client.h" 
#include "Compress.h" 
 
#ifdef _DEBUG 
#undef THIS_FILE 
static char THIS_FILE[]=__FILE__; 
#define new DEBUG_NEW 
#endif 
 
extern "C" void va_g729a_init_encoder(); 
extern "C" void va_g729a_encoder(short *speech, unsigned char *bitstream); 
extern "C" void va_g729a_init_decoder(); 
extern "C" void va_g729a_decoder(unsigned char *bitstream, short *synth_short, int bfi); 
 
#define  L_FRAME_COMPRESSED 10 
#define  L_FRAME            80 
 
#pragma comment(lib,"G729a") 
 
CCompress::CCompress() 
{ 
	va_g729a_init_encoder(); 
	va_g729a_init_decoder(); 
} 
 
CCompress::~CCompress() 
{ 
 
} 
/////////////////////////////////////////////////////////////////////////////// 
//压缩 
BOOL CCompress::CompressAudioData(char *pin,int len,char* pout,int* lenr) 
{ 
	if(!pin||len!=SIZE_AUDIO_FRAME||!pout) 
		return false; 
	 
	//分为6块压缩 
	va_g729a_encoder((short*)pin,(BYTE*)pout); 
	va_g729a_encoder((short*)(pin+160),(BYTE*)pout+10); 
	va_g729a_encoder((short*)(pin+320),(BYTE*)pout+20); 
	va_g729a_encoder((short*)(pin+480),(BYTE*)pout+30); 
	va_g729a_encoder((short*)(pin+640),(BYTE*)pout+40); 
	va_g729a_encoder((short*)(pin+800),(BYTE*)pout+50); 
 
	if(lenr) 
		*lenr=SIZE_AUDIO_PACKED/*60*/; 
 
	return true; 
} 
/////////////////////////////////////////////////////////////////////////////// 
//解压 
BOOL CCompress::DeCompressAudioData(char *pin,int len,char* pout,int* lenr) 
{ 
	if(!pin||len!=SIZE_AUDIO_PACKED||!pout) 
		return false; 
 
	//分为6块解压 
	va_g729a_decoder((BYTE*)pin,(short*)(pout),0); 
	va_g729a_decoder((BYTE*)pin+10,(short*)(pout+160),0); 
	va_g729a_decoder((BYTE*)pin+20,(short*)(pout+320),0); 
	va_g729a_decoder((BYTE*)pin+30,(short*)(pout+480),0); 
	va_g729a_decoder((BYTE*)pin+40,(short*)(pout+640),0); 
	va_g729a_decoder((BYTE*)pin+50,(short*)(pout+800),0); 
 
	if(lenr) 
		*lenr=SIZE_AUDIO_FRAME/*60*/; 
	 
	return true; 
} 
 
///////////////////////////////////////////////////////////////////////////////