求教下speex编解码的问题

	int		  _ErrorFlag = 0;



	char	  _Output_Temp[200] = { 0 };



//编码

	SpeexBits _Bits;



	void*     _State;



	//所要编码的数组

	short	  _Input[200]  = { 0 };



	for ( int i = 0; i < 200; i++ )

	{



		_Input[i] = 1;



	}





	_State = speex_encoder_init( &speex_nb_mode ); 



	//设置编码质量

	int quality_value = 8;



	speex_encoder_ctl( _State, SPEEX_SET_QUALITY, &quality_value ); 



	speex_bits_init( &_Bits ); 



	speex_bits_reset( &_Bits );





	speex_encode_int( _State, _Input, &_Bits );



	int nbBytes = speex_bits_write( &_Bits, _Output_Temp, 200 ); 



	speex_encoder_destroy( _State );



	speex_bits_destroy( &_Bits );





	//解码

	SpeexBits _Bits_De;



	void*     _State_De;



	//解码数组

	short	  _Output[200]  = { 0 };



	_State_De = speex_decoder_init( &speex_nb_mode ); 



	speex_bits_init( &_Bits_De );



	speex_bits_read_from( &_Bits_De, _Output_Temp, nbBytes );



	quality_value = 8;



	speex_decoder_ctl( _State_De, SPEEX_SET_QUALITY, &quality_value ); 







	//返回结果为0 但是_Output仍然为0.而不是1....

	int nRet = speex_decode_int( _State_De, &_Bits_De , _Output );



	speex_decoder_destroy( _State_De );



	speex_bits_destroy( &_Bits_De );