what ?<br><br>I don't know what your question is.<br><br><br><br><div class="gmail_quote">On Mon, Apr 6, 2009 at 9:35 AM, seven du <span dir="ltr"><<a href="mailto:seven@idapted.com">seven@idapted.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hi, can someone explain this to me?<br>
<br>
In switch_core_media_bug.c, around line 173:<br>
<br>
<br>
<br>
for (x = 0; x < blen; x++) {<br>
int32_t z = 0;<br>
<br>
if (x < rlen) {<br>
z += (int32_t) *(fp + x); //what's difference here with z =<br>
(int32_t) *(fp + x) ?<br>
}<br>
if (x < wlen) {<br>
z += (int32_t) *(dp + x);<br>
}<br>
switch_normalize_to_16bit(z);<br>
*(fp + x) = (int16_t) z / 2;<br>
}<br>
<br>
And for switch_normalize_to_16bit, according to switch_utils.h,<br>
<br>
#define SWITCH_SMAX 32767<br>
#define SWITCH_SMIN -32768<br>
#define switch_normalize_to_16bit(n) if (n > SWITCH_SMAX) n =<br>
SWITCH_SMAX / 2; else if (n < SWITCH_SMIN) n = SWITCH_SMIN / 2;<br>
<br>
Then<br>
switch_normalize_to_16bit( 32768 ), z = 32767/2, and (int16_t) z / 2 =<br>
32767/4<br>
switch_normalize_to_16bit( 32766) , z = 32766, and (int16_t) z / 2 =<br>
32766/2<br>
<br>
Does that make sense? I guess it should be like this:<br>
<br>
#define switch_normalize_to_16bit(n) if (n > SWITCH_SMAX) n =<br>
SWITCH_SMAX / 2; else if (n < SWITCH_SMIN) n = SWITCH_SMIN / 2; else n<br>
= n / 2;<br>
<br>
switch_normalize_to_16bit(z);<br>
*(fp + x) = (int16_t) z;<br>
<br>
<br>
Thank you.<br>
<br>
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</blockquote></div><br><br clear="all"><br>-- <br>Anthony Minessale II<br><br>FreeSWITCH <a href="http://www.freeswitch.org/">http://www.freeswitch.org/</a><br>ClueCon <a href="http://www.cluecon.com/">http://www.cluecon.com/</a><br>
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