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This is an automatically generated e-mail. To reply, visit:
<a href="https://reviewboard.asterisk.org/r/2084/">https://reviewboard.asterisk.org/r/2084/</a>
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<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
<p style="margin-top: 0;">On August 30th, 2012, 3:19 p.m., <b>rmudgett</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/2084/diff/4/?file=31094#file31094line745" style="color: black; font-weight: bold; text-decoration: underline;">trunk/main/dsp.c</a>
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(Diff revision 4)
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static int dtmf_detect(struct ast_dsp *dsp, digit_detect_state_t *s, int16_t amp[], int samples, int squelch, int relax)</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="n">s</span><span class="o">-></span><span class="n">td</span><span class="p">.</span><span class="n">dtmf</span><span class="p">.</span><span class="n">lasthit</span> <span class="o">!=</span> <span class="n">s</span><span class="o">-></span><span class="n">td</span><span class="p">.</span><span class="n">dtmf</span><span class="p">.</span><span class="n">current_hit</span><span class="p">)</span> <span class="p">{</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="cm">/* 2 misses of current_hit */</span></pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="n">hit</span> <span class="o">==</span> <span class="n">s</span><span class="o">-></span><span class="n">td</span><span class="p">.</span><span class="n">dtmf</span><span class="p">.</span><span class="n">lasthit</span><span class="p">)</span> <span class="p">{</span></pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="n">hit</span> <span class="o">==</span> <span class="n">s</span><span class="o">-></span><span class="n">td</span><span class="p">.</span><span class="n">dtmf</span><span class="p">.</span><span class="n">lasthit</span><span class="p">)</span> <span class="p">{</span></pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="n">s</span><span class="o">-></span><span class="n">td</span><span class="p">.</span><span class="n">dtmf</span><span class="p">.</span><span class="n">current_hit</span><span class="p">)</span> <span class="p">{</span></pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="cm">/* 2 of the same, either a BEGIN or END digit */</span></pre></td>
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<td bgcolor="#ffc5ce" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="cm">/* We are in the middle of a digit already */</span></pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="n">hit</span><span class="p">)</span> <span class="p">{</span></pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="n">hit</span><span class="p">)</span> <span class="p">{</span></pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="n">hit</span> <span class="o">!=</span> <span class="n">s</span><span class="o">-></span><span class="n">td</span><span class="p">.</span><span class="n">dtmf</span><span class="p">.</span><span class="n">current_hit</span><span class="p">)</span> <span class="p">{</span></pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">store_digit</span><span class="p">(</span><span class="n">s</span><span class="p">,</span> <span class="n">hit</span><span class="p">);</span></pre></td>
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<td bgcolor="#ffc5ce" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="cm">/* Look for a start of a new digit.</span></pre></td>
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<td bgcolor="#ffc5ce" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> This is because hits_to_begin may be smaller than misses_to_end</span></pre></td>
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<td bgcolor="#ffc5ce" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> and we may find the beginning of new digit before we consider last one ended. */</span></pre></td>
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<td bgcolor="#ffc5ce" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">s</span><span class="o">-></span><span class="n">td</span><span class="p">.</span><span class="n">dtmf</span><span class="p">.</span><span class="n">current_hit</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span></pre></td>
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<td bgcolor="#ffc5ce" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="p">}</span> <span class="k">else</span> <span class="p">{</span></pre></td>
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<td bgcolor="#ffc5ce" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="cm">/* Current hit was same as last, so increment digit duration (of last digit) */</span></pre></td>
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<td bgcolor="#ffc5ce" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">s</span><span class="o">-></span><span class="n">digitlen</span><span class="p">[</span><span class="n">s</span><span class="o">-></span><span class="n">current_digits</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]</span> <span class="o">+=</span> <span class="n">DTMF_GSIZE</span><span class="p">;</span></pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="p">}</span></pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="p">}</span></pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="p">}</span> <span class="k">else</span> <span class="p">{</span></pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">s</span><span class="o">-></span><span class="n">td</span><span class="p">.</span><span class="n">dtmf</span><span class="p">.</span><span class="n">current_hit</span> <span class="o">=</span> <span class="n">hit</span><span class="p">;</span></pre></td>
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<td bgcolor="#ffc5ce" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="cm">/* No Digit */</span></pre></td>
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<td bgcolor="#ffc5ce" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">s</span><span class="o">-></span><span class="n">td</span><span class="p">.</span><span class="n">dtmf</span><span class="p">.</span><span class="n">misses</span><span class="o">++</span><span class="p">;</span></pre></td>
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<td bgcolor="#ffc5ce" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="n">s</span><span class="o">-></span><span class="n">td</span><span class="p">.</span><span class="n">dtmf</span><span class="p">.</span><span class="n">misses</span> <span class="o">==</span> <span class="n">s</span><span class="o">-></span><span class="n">td</span><span class="p">.</span><span class="n">dtmf</span><span class="p">.</span><span class="n">misses_to_end</span><span class="p">)</span> <span class="p">{</span></pre></td>
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<td bgcolor="#ffc5ce" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="cm">/* There were enough misses to consider digit ended */</span></pre></td>
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<td bgcolor="#ffc5ce" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">s</span><span class="o">-></span><span class="n">td</span><span class="p">.</span><span class="n">dtmf</span><span class="p">.</span><span class="n">current_hit</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span></pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="p">}</span></pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="p">}</span></pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="p">}</span></pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="p">}</span></pre></td>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Maybe change to make 2 misses end any digit:
if (s->td.dtmf.lasthit != s->td.dtmf.current_hit) {
/* 2 misses of current_hit */
if (hit == s->td.dtmf.lasthit) {
/* 2 of the same, either a BEGIN or END digit */
if (hit) {
store_digit(s, hit);
}
s->td.dtmf.current_hit = hit;
} else {
/* 2 misses ends current digit */
s->td.dtmf.current_hit = 0;
}
}
</pre>
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<pre style="margin-left: 1em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">I abandoned this, and produced https://reviewboard.asterisk.org/r/2085/</pre>
<br />
<p>- Alec</p>
<br />
<p>On August 26th, 2012, 2:20 a.m., Alec Davis wrote:</p>
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<div>Review request for Asterisk Developers, rmudgett and Jason Parker.</div>
<div>By Alec Davis.</div>
<p style="color: grey;"><i>Updated Aug. 26, 2012, 2:20 a.m.</i></p>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Use a simpler method to detect changes in DTMF ON/OFF tones.
Similar method to latest spandsp/dtmf.c
We must detect 2 silences for DTMF END.
Reverts some of 111022 that added DTMF_HITS_TO_BEGIN and DTMF_MISSES_TO_END
Exisiting dtmf events with;
/* hits_to_begin = 3, misses to end = 2 */
/* --------A hits=1, misses=1, lasthit='A'
* -------AA hits=2
* ------AAA hits=3, store_digit, current_hit='A', BEGIN A
* -----AAA- hits=1, misses=1, lasthit=' '
* ----AAA-- misses=2, current_hit=' ', END A
* ---AAA--B hits=1, misses=1, lasthit='B'
* --AAA--BB hits=2
* -AAA--BBB hits=3, store_digit, current_hit='B', BEGIN B
* AAA--BBB- hits=1, misses=1, lasthit=' '
* AA--BBB-B hits=1, misses=1, lasthit='B'
* A--BBB-BB digitlen += GSIZE
* deal with an interruption
* --BBB-BB- hits=1, misses=1, lasthit=' '
* -BBB-BB-B hits=1, misses=1, lasthit='B'
* BBB-BB-BB digitlen += GSIZE
* deal with no interdigit pause
* BB-BB-BBC hits=1, misses=1, lasthit='C'
* B-BB-BBCC current_hit=' ', END B
* -BB-BBCCC hits=2
* BB-BBCCCC hits=3, store_digit, current_hit='C', BEGIN C
*/
How it would be without, hits_to_begin, and misses_to_end
/* ------AA Begin A
* -----AA- no change
* ----AA-- End A
* ---AA--B no change
* --AA--BC no change
* -AA--BCC Start C
* AA--BCCD no change
* A--BCCDD Start D
* --BCCDD- no change
* -BCCDD-E no change
* BCCDD-EE Start E
* CCDD-EE- no change
* CDD-EE-F no change
* DD-EE-F- no change
* D-EE-F-- End E
*/
</pre>
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<b style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Bugs: </b>
<a href="https://issues.asterisk.org/jira/browse/ASTERISK-17493">ASTERISK-17493</a>,
<a href="https://issues.asterisk.org/jira/browse/ASTERISK-19610">ASTERISK-19610</a>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
<ul style="margin-left: 3em; padding-left: 0;">
<li>trunk/main/dsp.c <span style="color: grey">(371649)</span></li>
</ul>
<p><a href="https://reviewboard.asterisk.org/r/2084/diff/" style="margin-left: 3em;">View Diff</a></p>
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