g711u g711a formats convert to each other __g711a

PCM to g711 code, a lot of data, here just say the g711u conversion to g711a method, very simple, as follows:

unsigned char * ulawtoalaw (unsigned char * ulawbuffer,int len)
{
unsigned char * ulaw = Ulawbuffer;
unsigned char * alaw = new unsigned char[len];


int count = 0;
while (Count < Len)
{
Alaw[count] = Ulaw2alaw (*ulaw);
count++;
ulaw++;
}


return alaw;
}

Description: The first parameter is g711u buffer, the second parameter is the length of buffer, the function returns G711A data. where Ulaw2alaw (*ulaw), this function is inside the library G711codec

This article briefly said g711u to g711a, in fact g711a to g711u is the same, not to say