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git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@37345 65c4cc65-6c06-0410-ace0-fbb531ad65f3
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Tilghman Lesher
2006-07-10 19:05:48 +00:00
parent 4a3e227291
commit 229ab7d9cf
11 changed files with 353 additions and 384 deletions
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18
ulaw.c
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@@ -85,22 +85,22 @@ static unsigned char linear2ulaw(short sample)
void ast_ulaw_init(void)
{
int i;
for(i = 0;i < 256;i++) {
short mu,e,f,y;
static short etab[]={0,132,396,924,1980,4092,8316,16764};
for (i = 0; i < 256; i++) {
short mu, e, f, y;
static short etab[] = {0,132,396,924,1980,4092,8316,16764};
mu = 255-i;
e = (mu & 0x70)/16;
mu = 255 - i;
e = (mu & 0x70) / 16;
f = mu & 0x0f;
y = f * (1 << (e + 3));
y += etab[e];
if (mu & 0x80) y = -y;
__ast_mulaw[i] = y;
if (mu & 0x80)
y = -y;
__ast_mulaw[i] = y;
}
/* set up the reverse (mu-law) conversion table */
for(i = -32768; i < 32768; i++) {
for (i = -32768; i < 32768; i++) {
__ast_lin2mu[((unsigned short)i) >> 2] = linear2ulaw(i);
}
}