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<p style="margin-top: 0;">On February 5th, 2014, 9:52 p.m. UTC, <b>Mark Michelson</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/3178/diff/1/?file=53397#file53397line50" style="color: black; font-weight: bold; text-decoration: underline;">/include/asterisk/codec.h</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="cm">/*! \brief Sample rate */</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="kt">unsigned</span> <span class="kt">int</span> <span class="n">sample_rate</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="tb"> </span><span class="cm">/*! \brief Minimum length of media that can be carried (in milliseconds) */</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="kt">unsigned</span> <span class="kt">int</span> <span class="n">minimum_ms</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="tb"> </span><span class="cm">/*! \brief Maximum length of media that can be carried (in milliseconds) */</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="kt">unsigned</span> <span class="kt">int</span> <span class="n">maximum_ms</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="tb"> </span><span class="cm">/*! \brief The number of milliseconds the length can be incremented by */</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="kt">unsigned</span> <span class="kt">int</span> <span class="n">increment_ms</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="tb"> </span><span class="cm">/*! \brief Default length of media carried (in milliseconds) */</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="kt">unsigned</span> <span class="kt">int</span> <span class="n">default_ms</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;">So since we're in the early stages of this, I'm going to request that documentation for these fields be more specific.
sample_rate: What are the units for this? Is this samples per second or something else?
minimum_ms and maximum_ms: Is this the maximum number of milliseconds per sample or for some other time slice?
increment_ms: I'm completely in the dark on what this means just from the description. The length of what, exactly? Under what circumstances are we talking about increasing the number of milliseconds of something?
default_ms: When you say "length of media" is that the length per sample?</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've removed increment_ms. It was actually duplicating minimum_ms and didn't add any value, except confusion.</pre>
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<p style="margin-top: 0;">On February 5th, 2014, 9:52 p.m. UTC, <b>Mark Michelson</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/3178/diff/1/?file=53398#file53398line458" style="color: black; font-weight: bold; text-decoration: underline;">/include/asterisk/format.h</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">const char *ast_codec2str(struct ast_format *format);</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm">/*! \brief Returns the number of samples contained in the frame */</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="kt">int</span> <span class="nf">ast_codec_get_samples</span><span class="p">(</span><span class="k">struct</span> <span class="n">ast_frame</span> <span class="o">*</span><span class="n">f</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;">Similar suggestion as the ast_codec get_samples() callback. Rename this to better reflect that you're retrieving a count of samples as opposed to retrieving actual samples.</pre>
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<p style="margin-top: 0;">On February 5th, 2014, 9:52 p.m. UTC, <b>Mark Michelson</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/3178/diff/1/?file=53400#file53400line49" style="color: black; font-weight: bold; text-decoration: underline;">/include/asterisk/format_cap_ng.h</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="k">struct</span> <span class="n">ast_format_cap</span> <span class="o">*</span><span class="nf">ast_format_cap_ng_alloc</span><span class="p">(</span><span class="k">enum</span> <span class="n">ast_format_cap_flags</span> <span class="n">flags</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;">Does "ng" stand for "next generation"? If this ends up replacing format_cap.h, would the "ng" be dropped from all these function names?</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;">Yes.</pre>
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<p style="margin-top: 0;">On February 5th, 2014, 9:52 p.m. UTC, <b>Mark Michelson</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/3178/diff/1/?file=53400#file53400line163" style="color: black; font-weight: bold; text-decoration: underline;">/include/asterisk/format_cap_ng.h</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm">/*!</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"> * \brief Find if input ast_format is within the capabilities of the ast_format_cap object</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"> * then return the compatible format from the capabilities structure in the result.</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></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> * \retval non-NULL if format is compatible</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"> * \retval NULL if not compatible</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></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> * \note The reference count of the returned format is increased. It must be released using ao2_ref</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"> * or ao2_cleanup.</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></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="k">struct</span> <span class="n">ast_format</span> <span class="o">*</span><span class="nf">ast_format_cap_ng_get_compatible_format</span><span class="p">(</span><span class="k">const</span> <span class="k">struct</span> <span class="n">ast_format_cap</span> <span class="o">*</span><span class="n">cap</span><span class="p">,</span> <span class="k">const</span> <span class="k">struct</span> <span class="n">ast_format</span> <span class="o">*</span><span class="n">format</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;">Is it possible that there could be multiple compatible formats?</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 answer is... yes. When attributes are in play you may have multiple formats of same codec with different attributes, and one may be an exact match while others may be a subset. Right now the code is written to only immediately return if there's an exact match. If subsets exist then only one of them will be returned.</pre>
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<p style="margin-top: 0;">On February 5th, 2014, 9:52 p.m. UTC, <b>Mark Michelson</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/3178/diff/1/?file=53401#file53401line135" style="color: black; font-weight: bold; text-decoration: underline;">/include/asterisk/format_ng.h</a>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cm"> * \note The returned format must be treated as immutable.</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></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="k">struct</span> <span class="n">ast_format</span> <span class="o">*</span><span class="nf">ast_format_ng_joint</span><span class="p">(</span><span class="k">const</span> <span class="k">struct</span> <span class="n">ast_format</span> <span class="o">*</span><span class="n">format1</span><span class="p">,</span> <span class="k">const</span> <span class="k">struct</span> <span class="n">ast_format</span> <span class="o">*</span><span class="n">format2</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;">Can this be enforced by making the return const?
(Same question applies for other places where this note exists)</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;">It's possible but it would require wrapping ao2_ref and ao2_cleanup and casting the const away. I was uncertain whether I wanted to go down that path.</pre>
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<p>- Joshua</p>
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<p>On February 7th, 2014, 2:59 p.m. UTC, Joshua Colp wrote:</p>
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<div>Review request for Asterisk Developers.</div>
<div>By Joshua Colp.</div>
<p style="color: grey;"><i>Updated Feb. 7, 2014, 2:59 p.m.</i></p>
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<b style="color: #575012; font-size: 10pt;">Repository: </b>
Asterisk
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<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;">This change has a few things in it:
1. Some media related things have been moved around to more logical places or their own parts (smoothers).
2. A new implementation of media formats according to https://wiki.asterisk.org/wiki/display/AST/Media+Format+Rewrite. The implementation doesn't completely adhere to the design since I tweaked things but it mostly conforms.
3. Unit tests for the above implementation.
What I'd like feedback on is the actual media formats implementation and the API design itself. Is this something you would be comfortable using?</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;">Ran unit tests, all passed.
Note: I know AO2 throws a fit and it's because a container isn't getting initialized. Getting said container initialized requires beginning the hacking apart process.</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>/branches/12/tests/test_format_cap.c <span style="color: grey">(PRE-CREATION)</span></li>
<li>/branches/12/tests/test_format_cache.c <span style="color: grey">(PRE-CREATION)</span></li>
<li>/branches/12/tests/test_core_format.c <span style="color: grey">(PRE-CREATION)</span></li>
<li>/branches/12/tests/test_core_codec.c <span style="color: grey">(PRE-CREATION)</span></li>
<li>/branches/12/res/res_rtp_asterisk.c <span style="color: grey">(407438)</span></li>
<li>/branches/12/res/res_fax.c <span style="color: grey">(407438)</span></li>
<li>/branches/12/main/smoother.c <span style="color: grey">(PRE-CREATION)</span></li>
<li>/branches/12/main/frame.c <span style="color: grey">(407438)</span></li>
<li>/branches/12/main/format_ng.c <span style="color: grey">(PRE-CREATION)</span></li>
<li>/branches/12/main/format_cap_ng.c <span style="color: grey">(PRE-CREATION)</span></li>
<li>/branches/12/main/format_cache.c <span style="color: grey">(PRE-CREATION)</span></li>
<li>/branches/12/main/format.c <span style="color: grey">(407438)</span></li>
<li>/branches/12/main/codec_builtin.c <span style="color: grey">(PRE-CREATION)</span></li>
<li>/branches/12/main/codec.c <span style="color: grey">(PRE-CREATION)</span></li>
<li>/branches/12/main/asterisk.c <span style="color: grey">(407438)</span></li>
<li>/branches/12/include/asterisk/vector.h <span style="color: grey">(407438)</span></li>
<li>/branches/12/include/asterisk/smoother.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>/branches/12/include/asterisk/frame.h <span style="color: grey">(407438)</span></li>
<li>/branches/12/include/asterisk/format_ng.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>/branches/12/include/asterisk/format_cap_ng.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>/branches/12/include/asterisk/format_cache.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>/branches/12/include/asterisk/format.h <span style="color: grey">(407438)</span></li>
<li>/branches/12/include/asterisk/codec.h <span style="color: grey">(PRE-CREATION)</span></li>
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<p><a href="https://reviewboard.asterisk.org/r/3178/diff/" style="margin-left: 3em;">View Diff</a></p>
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