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<p style="margin-top: 0;">On February 7th, 2011, 11:38 a.m., <b>David Vossel</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/1092/diff/1/?file=15457#file15457line1528" style="color: black; font-weight: bold; text-decoration: underline;">/team/oej/pinesounds-dtmf-feature-delay-1.4/res/res_features.c</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static int feature_interpret_helper(struct ast_channel *chan, struct ast_channel *peer,</pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="kt">int</span> <span class="n">res</span> <span class="o">=</span> <span class="n">FEATURE_RETURN_PASSDIGITS</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="kt">int</span> <span class="n">res</span> <span class="o">=</span> <span class="n">FEATURE_RETURN_PASSDIGITS</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="kt">int</span> <span class="n">feature_detected</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="kt">int</span> <span class="n">feature_detected</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; "></pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></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="o">!</span><span class="p">(</span><span class="n">peer</span> <span class="o">&&</span> <span class="n">chan</span> <span class="o">&&</span> <span class="n">config</span><span class="p">)</span> <span class="o">&&</span> <span class="n">operation</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="o">!</span><span class="p">(</span><span class="n">peer</span> <span class="o">&&</span> <span class="n">chan</span> <span class="o">&&</span> <span class="n">config</span><span class="p">)</span> <span class="o">&&</span> <span class="n">operation</span><span class="hl"> </span><span class="o"><span class="hl">==</span></span><span class="hl"> </span><span class="mi"><span class="hl">1</span></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">return</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span> <span class="cm">/* can not run feature operation */</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">return</span> <span class="o">-</span><span class="mi">1</span><span class="p">;</span> <span class="cm">/* can not run feature operation */</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;">If operation is going to be overloaded to mean multiple things, it needs to be updated in the function's documentation. I'd also recommend creating an enum to represent the different values operation can be. This helps self document the code.</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;">Agreed</pre>
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<p style="margin-top: 0;">On February 7th, 2011, 11:38 a.m., <b>David Vossel</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/1092/diff/1/?file=15457#file15457line1549" style="color: black; font-weight: bold; text-decoration: underline;">/team/oej/pinesounds-dtmf-feature-delay-1.4/res/res_features.c</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static int feature_interpret_helper(struct ast_channel *chan, struct ast_channel *peer,</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">feature</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="n">memcpy</span><span class="p">(</span><span class="n">feature</span><span class="p">,</span> <span class="o">&</span><span class="n">builtin_features</span><span class="p">[</span><span class="n">x</span><span class="p">],</span> <span class="k">sizeof</span><span class="p">(</span><span class="n">feature</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="n">memcpy</span><span class="p">(</span><span class="n">feature</span><span class="p">,</span> <span class="o">&</span><span class="n">builtin_features</span><span class="p">[</span><span class="n">x</span><span class="p">],</span> <span class="k">sizeof</span><span class="p">(</span><span class="n">feature</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; "> <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;">why was this check added?</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;">Because when using the "check" mode, there's no feature to copy to and we crashed here.</pre>
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<p style="margin-top: 0;">On February 7th, 2011, 11:38 a.m., <b>David Vossel</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/1092/diff/1/?file=15457#file15457line1580" style="color: black; font-weight: bold; text-decoration: underline;">/team/oej/pinesounds-dtmf-feature-delay-1.4/res/res_features.c</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static int feature_interpret_helper(struct ast_channel *chan, struct ast_channel *peer,</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="k">if</span> <span class="p">(</span><span class="n">operation</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">operation</span><span class="hl"> </span><span class="o"><span class="hl">==</span></span><span class="hl"> </span><span class="mi"><span class="hl">2</span></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="n">res</span> <span class="o">=</span> <span class="n">FEATURE_RETURN_SUCCESS</span><span class="p">;</span> <span class="cm">/* We found something */</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="p">}</span> <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="n">operation</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="n">res</span> <span class="o">=</span> <span class="n">tmpfeature</span><span class="o">-></span><span class="n">operation</span><span class="p">(</span><span class="n">chan</span><span class="p">,</span> <span class="n">peer</span><span class="p">,</span> <span class="n">config</span><span class="p">,</span> <span class="n">code</span><span class="p">,</span> <span class="n">sense</span><span class="p">,</span> <span class="n">tmpfeature</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="n">res</span> <span class="o">=</span> <span class="n">tmpfeature</span><span class="o">-></span><span class="n">operation</span><span class="p">(</span><span class="n">chan</span><span class="p">,</span> <span class="n">peer</span><span class="p">,</span> <span class="n">config</span><span class="p">,</span> <span class="n">code</span><span class="p">,</span> <span class="n">sense</span><span class="p">,</span> <span class="n">tmpfeature</span><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;">It would also be useful to create a new return value indicating that the feature was just being looked for and was found.</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;">Agreed. Now, this is a bug fix and a new value would change the API in releases. I think we need different code for trunk than for releases in order to avoid breaking things.</pre>
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<p style="margin-top: 0;">On February 7th, 2011, 11:38 a.m., <b>David Vossel</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/1092/diff/1/?file=15457#file15457line1586" style="color: black; font-weight: bold; text-decoration: underline;">/team/oej/pinesounds-dtmf-feature-delay-1.4/res/res_features.c</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static int feature_interpret_helper(struct ast_channel *chan, struct ast_channel *peer,</pre></td>
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<th bgcolor="#e9eaa8" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2">1579</font></th>
<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">memcpy</span><span class="p">(</span><span class="n">feature</span><span class="p">,</span> <span class="n">tmpfeature</span><span class="p">,</span> <span class="k">sizeof</span><span class="p">(</span><span class="n">feature</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">feature</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; "> <span class="n">memcpy</span><span class="p">(</span><span class="n">feature</span><span class="p">,</span> <span class="o">&</span><span class="n">builtin_features</span><span class="p">[</span><span class="n">x</span><span class="p">],</span> <span class="k">sizeof</span><span class="p">(</span><span class="n">feature</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="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">res</span> <span class="o">!=</span> <span class="n">FEATURE_RETURN_KEEPTRYING</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">res</span> <span class="o">!=</span> <span class="n">FEATURE_RETURN_KEEPTRYING</span><span class="p">)</span> <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;">I don't understand this check.</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;">See above.</pre>
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<p style="margin-top: 0;">On February 7th, 2011, 11:38 a.m., <b>David Vossel</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/1092/diff/1/?file=15457#file15457line2357" style="color: black; font-weight: bold; text-decoration: underline;">/team/oej/pinesounds-dtmf-feature-delay-1.4/res/res_features.c</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">int ast_bridge_call(struct ast_channel *chan,struct ast_channel *peer,struct ast_bridge_config *config)</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="k">if</span> <span class="p">(</span><span class="n">f</span><span class="o">-></span><span class="n">frametype</span> <span class="o">==</span> <span class="n">AST_FRAME_DTMF_BEGIN</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="p">}</span> <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="n">f</span><span class="o">-></span><span class="n">frametype</span> <span class="o">==</span> <span class="n">AST_FRAME_DTMF</span><span class="hl"> </span><span class="o"><span class="hl">||</span></span><span class="hl"> </span><span class="n"><span class="hl">f</span></span><span class="o"><span class="hl">-></span></span><span class="n"><span class="hl">frametype</span></span><span class="hl"> </span><span class="o"><span class="hl">==</span></span><span class="hl"> </span><span class="n"><span class="hl">AST_FRAME_DTMF</span>_BEGIN</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">/* eat it */</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="k">if</span> <span class="p">(</span><span class="n">f</span><span class="o">-></span><span class="n">frametype</span> <span class="o">==</span> <span class="n">AST_FRAME_DTMF</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="kt">char</span> <span class="o">*</span><span class="n">featurecode</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="kt">char</span> <span class="o">*</span><span class="n">featurecode</span><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;">Since we already have an if else case for both DTMF end and DTMF begin, why do we need to combine them both now? It just increases indentation and complexity.</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 will review this. In the first version of the code I had much more code in common for BEGIN and END frames. It's not much now so I guess I can break out and duplicate code.</pre>
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<p style="margin-top: 0;">On February 7th, 2011, 11:38 a.m., <b>David Vossel</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/1092/diff/1/?file=15457#file15457line2394" style="color: black; font-weight: bold; text-decoration: underline;">/team/oej/pinesounds-dtmf-feature-delay-1.4/res/res_features.c</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">int ast_bridge_call(struct ast_channel *chan,struct ast_channel *peer,struct ast_bridge_config *config)</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="ew"> </span> <span class="p">}</span> <span class="k">else</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; "><span class="ew"> </span> <span class="k">if</span> <span class="p">(</span><span class="n">sendingdtmfdigit</span> <span class="o">==</span> <span class="mi">1</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; "><span class="ew"> </span> <span class="cm">/* We let the BEGIN go through happily, so let's not bother with the END, since we already</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"><span class="ew"> </span> know it's not something we bother with */</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="ew"> </span> <span class="n">ast_write</span><span class="p">(</span><span class="n">other</span><span class="p">,</span> <span class="n">f</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; "><span class="ew"> </span> <span class="n">sendingdtmfdigit</span> <span class="o">=</span> <span class="mi">0</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; "><span class="ew"> </span> <span class="p">}</span> <span class="k">else</span> <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;">Could there ever be a scenario where multiple DTMF begins are received before the DTMF ends come through? If so, the assumption the use of this variable makes may not hold true.</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;">The RTP code does not allow that. If we get a BEGIN during incoming DTMF, it will send an END frame first to the bridge. I don't know how other channels handle it, but I assumed that was the "norm".</pre>
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<p>- Olle E</p>
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<p>On February 3rd, 2011, 2:55 a.m., Olle E Johansson wrote:</p>
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<div>Review request for Asterisk Developers.</div>
<div>By Olle E Johansson.</div>
<p style="color: grey;"><i>Updated 2011-02-03 02:55:01</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;">When a channel listens for DTMF in the core bridge, the outbound DTMF is not sent until we have received DTMF_END. For a long DTMF, this is a disaster. We send 4 seconds of DTMF to Asterisk, asterisk starts sending after and the call is interrupted for a total of 8 secs.
With this change, the DTMF_BEGIN frame is inspected and checked. If it matches a feature code, we wait for DTMF_END and activate the feature as before. If it doesn't match a feature, the frame is forwarded along with the DTMF_END without delay. By doing it this way, DTMF is not delayed.
I've also changed two DTMF relay events to actually use the same duration as the incoming DTMF.
I have no experience of messing around with features.c and bridges, so please review this carefully. It is proven to work both in a 1.6.0 version and 1.4.
(I will remove the red code... Hard to miss)</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </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;">Testing done with multiple phones in 1.6.0 and 1.4 versions of this patch.</pre>
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<b style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Bugs: </b>
<a href="https://issues.asterisk.org/view.php?id=18738">18738</a>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>/team/oej/pinesounds-dtmf-feature-delay-1.4/res/res_features.c <span style="color: grey">(305981)</span></li>
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<p><a href="https://reviewboard.asterisk.org/r/1092/diff/" style="margin-left: 3em;">View Diff</a></p>
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