g729a_coder.c

DSP上优化的G.729A代码

#include "../Common/typedef.h"
#include "../Include/G729A_basic_op.h"
#include "../Include/G729A_ld8a.h"
#include "../Include/G729A_tab_ld8a.h"
#include "../Include/G729A_Coder.h"


extern Word16 *G729A_new_speech;            
    
static Word16 G729A_prm[G729A_PRM_SIZE];             

static unsigned int G729A_bb_; 
static unsigned int G729A_nbb_; 
static unsigned char* G729A_bc_; 


void G729AInitEncoder()
{
	G729AInit_Pre_Process();
	G729AInit_Coder_ld8a();
	G729ASet_zero(G729A_prm, G729A_PRM_SIZE);    
}

int G729AEnCoder(Word16 *sample, char *buf, int samplelen, int *buflen)
{    
    int i = 0, j = 0;
    
	*buflen = 0;

	G729A_bc_ = (unsigned char *)buf;
	G729A_bb_ = 0; 
	G729A_nbb_ = 0; 
	
	for(i = 0; i < 3; i++)
	{
        memcpy((char *)G729A_new_speech, (char *)(sample + i*G729A_L_FRAME), G729A_L_FRAME*2);
	
        G729APre_Process(G729A_new_speech, G729A_L_FRAME);      
	
        G729ACoder_ld8a(G729A_prm);
	
	    for(j = 0; j < G729A_PRM_SIZE; j++)
		{
			PUT_BITS(G729A_prm[j], G729A_bitsno [j], G729A_nbb_, G729A_bb_, G729A_bc_);
		}
		*buflen += 10;
		STORE_BITS(G729A_bb_, G729A_bc_);
	}	
    return (0);
}