HI all,
i would like to know from where we can get the algorithm of this part of the
code which you have implemented...
it lies in the pjsip-apps/src/samples/level.c repository... and the part
of the code i am refering to is ..
for (i=0; i<COUNT; ++i) {
00136 pj_int16_t
<http://www.pjsip.org/pjlib/docs/html/group__PJ__BASIC.htm#ga1bc332ac2d70cd1a23adef144571790f>
framebuf[NSAMPLES];
00137 pjmedia_frame
<http://www.pjsip.org/pjmedia/docs/html/structpjmedia__frame.htm> frm;
00138 pj_int32_t
<http://www.pjsip.org/pjlib/docs/html/group__PJ__BASIC.htm#gac65eeb4771a6fc34225302fee5bcb7e2>
level32;
00139 unsigned ms;
00140 int level;
00141
00142 frm.buf
<http://www.pjsip.org/pjmedia/docs/html/structpjmedia__frame.htm#adaef949faa0309df6383c2955d4405af>
= framebuf;
00143 frm.size
<http://www.pjsip.org/pjmedia/docs/html/structpjmedia__frame.htm#aef71e5daee31e30f0222aaca74819792>
= sizeof(framebuf);
00144
00145 pjmedia_port_get_frame
<http://www.pjsip.org/pjmedia/docs/html/group__PJMEDIA__PORT.htm#gabb664bcbd6c07ac3b0b4793a68c9a757>(file_port,
&frm);
00146
00147 level32 = pjmedia_calc_avg_signal
<http://www.pjsip.org/pjmedia/docs/html/group__PJMEDIA__SILENCEDET.htm#gaf2f16dcbcce6f9ad437f358e8a42ef02>(framebuf,
00148 file_port->info
<http://www.pjsip.org/pjmedia/docs/html/structpjmedia__port.htm#a1003b9085848f0a1ad3a3af9a760cbdb>.samples_per_frame
<http://www.pjsip.org/pjmedia/docs/html/structpjmedia__port__info.htm#afd0e1dca00660c509808a09ba3135e5c>);
00149 level = pjmedia_linear2ulaw(level32) ^ 0xFF;
00150
00151 ms = i * 1000 * file_port->info
<http://www.pjsip.org/pjmedia/docs/html/structpjmedia__port.htm#a1003b9085848f0a1ad3a3af9a760cbdb>.samples_per_frame
<http://www.pjsip.org/pjmedia/docs/html/structpjmedia__port__info.htm#afd0e1dca00660c509808a09ba3135e5c>
/
00152 file_port->info
<http://www.pjsip.org/pjmedia/docs/html/structpjmedia__port.htm#a1003b9085848f0a1ad3a3af9a760cbdb>.clock_rate
<http://www.pjsip.org/pjmedia/docs/html/structpjmedia__port__info.htm#a67150be4ab8cf4855fe8ca75156d9f61>;
00153 printf("%03d.%03d\t%7d\t%7d\n",
00154 ms/1000, ms%1000, level, level32);
00155 }
...Thanks in advance.
john Smith.
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