<html>
<body>
<div style="font-family: Verdana, Arial, Helvetica, Sans-Serif;">
<table bgcolor="#f9f3c9" width="100%" cellpadding="8" style="border: 1px #c9c399 solid;">
<tr>
<td>
This is an automatically generated e-mail. To reply, visit:
<a href="https://reviewboard.asterisk.org/r/3618/">https://reviewboard.asterisk.org/r/3618/</a>
</td>
</tr>
</table>
<br />
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
<p style="margin-top: 0;">On June 13th, 2014, 6:28 p.m. UTC, <b>Mark Michelson</b> wrote:</p>
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
<table width="100%" border="0" bgcolor="white" style="border: 1px solid #C0C0C0; border-collapse: collapse; margin: 2px padding: 2px;">
<thead>
<tr>
<th colspan="4" bgcolor="#F0F0F0" style="border-bottom: 1px solid #C0C0C0; font-size: 9pt; padding: 4px 8px; text-align: left;">
<a href="https://reviewboard.asterisk.org/r/3618/diff/1/?file=59647#file59647line64" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/apps/app_jack.c</a>
<span style="font-weight: normal;">
(Diff revision 1)
</span>
</th>
</tr>
</thead>
<tbody style="background-color: #e4d9cb; padding: 4px 8px; text-align: center;">
<tr>
<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">ASTERISK_FILE_VERSION(__FILE__, "$Revision$")</pre></td>
</tr>
</tbody>
<tbody>
<tr>
<th bgcolor="#e9eaa8" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2">64</font></th>
<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cp">#define RINGBUFFER_SIZE <span class="hl">16384</span></span></pre></td>
<th bgcolor="#e9eaa8" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">64</font></th>
<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="cp">#define RINGBUFFER_SIZE <span class="hl">65535*2</span></span></pre></td>
</tr>
</tbody>
</table>
<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 saw your comment about requiring a large ringbuffer for dealing with larger sampling rates, but I don't think a 128K allocation is the right way to go here.
I think instead, you can start by using a smaller allocation. When you want to write to the ringbuffer, use the jack_ringbuffer_write_space() function to determine if you have room to write the bytes. If you do not, you can free the current ringbuffer and create a new larger one to take its place. This way, the #define value acts as the basis for ringbuffer allocations but does not have to be so large as to dictate a maximum size.
I'm not sure if this would result in lost data, though, so feel free to let me know if this idea would not work.</pre>
</blockquote>
</blockquote>
<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;">Thanks for your review.
You are right defining the ringbuffer size in that way is awful.
I thought about your proposed solution with re-allocation new ringbuffers.
It might work, but is probably very tricky to implement as jack and asterisk are sharing them.
And I have no clue, if it will work at all since I have no experience with Jack.
I would propose another solution: define number of frames the ringbuffer needs be able to hold.
During initialization, when the frame_datalen is available, just use frame_datalen * frame_count.
In that way app_jack will be able to cope with higher sampling rates without always allocating such a large buffer.
What do you think?
</pre>
<br />
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
<p style="margin-top: 0;">On June 13th, 2014, 6:28 p.m. UTC, <b>Mark Michelson</b> wrote:</p>
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
<table width="100%" border="0" bgcolor="white" style="border: 1px solid #C0C0C0; border-collapse: collapse; margin: 2px padding: 2px;">
<thead>
<tr>
<th colspan="4" bgcolor="#F0F0F0" style="border-bottom: 1px solid #C0C0C0; font-size: 9pt; padding: 4px 8px; text-align: left;">
<a href="https://reviewboard.asterisk.org/r/3618/diff/1/?file=59647#file59647line190" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/apps/app_jack.c</a>
<span style="font-weight: normal;">
(Diff revision 1)
</span>
</th>
</tr>
</thead>
<tbody style="background-color: #e4d9cb; padding: 4px 8px; text-align: center;">
<tr>
<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static void log_jack_status(const char *prefix, jack_status_t status)</pre></td>
</tr>
</tbody>
<tbody>
<tr>
<th bgcolor="#e9eaa8" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2">187</font></th>
<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="n">ast_log</span><span class="p">(</span><span class="n">LOG_<span class="hl">NOTICE</span></span><span class="p">,</span> <span class="s">"%s: %s</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">prefix</span><span class="p">,</span> <span class="n">ast_str_buffer</span><span class="p">(</span><span class="n">str</span><span class="p">));</span></pre></td>
<th bgcolor="#e9eaa8" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">190</font></th>
<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="n">ast_log</span><span class="p">(</span><span class="n">LOG_<span class="hl">ERROR</span></span><span class="p">,</span> <span class="s">"%s: %s</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">prefix</span><span class="p">,</span> <span class="n">ast_str_buffer</span><span class="p">(</span><span class="n">str</span><span class="p">));</span></pre></td>
</tr>
</tbody>
</table>
<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">There is no reason for this to be an error message.</pre>
</blockquote>
</blockquote>
<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;">In my case I need to know immediately, if something with the Asterisk-Jack connection is wrong...
I would at least provide it as warning.</pre>
<br />
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
<p style="margin-top: 0;">On June 13th, 2014, 6:28 p.m. UTC, <b>Mark Michelson</b> wrote:</p>
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
<table width="100%" border="0" bgcolor="white" style="border: 1px solid #C0C0C0; border-collapse: collapse; margin: 2px padding: 2px;">
<thead>
<tr>
<th colspan="4" bgcolor="#F0F0F0" style="border-bottom: 1px solid #C0C0C0; font-size: 9pt; padding: 4px 8px; text-align: left;">
<a href="https://reviewboard.asterisk.org/r/3618/diff/1/?file=59647#file59647line411" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/apps/app_jack.c</a>
<span style="font-weight: normal;">
(Diff revision 1)
</span>
</th>
</tr>
</thead>
<tbody style="background-color: #e4d9cb; padding: 4px 8px; text-align: center;">
<tr>
<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static struct jack_data *destroy_jack_data(struct jack_data *jack_data)</pre></td>
</tr>
</tbody>
<tbody>
<tr>
<th bgcolor="#b1ebb0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2"></font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></pre></td>
<th bgcolor="#b1ebb0" style="border-left: 1px solid #C0C0C0; border-right: 1px solid #C0C0C0;" align="right"><font size="2">409</font></th>
<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="n">jack_data</span><span class="o">-></span><span class="n">frame_datalen</span> <span class="o">=</span> <span class="n">jack_data</span><span class="o">-></span><span class="n">audiohook_rate</span> <span class="o">/</span> <span class="mi">50</span><span class="p">;</span></pre></td>
</tr>
</tbody>
</table>
<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">You brought this up as a concern in your description, but considering that app_jack had been using a constant 160 previously, you are not introducing any new incorrect behavior by dividing the rate by 50. I say it's fine to go with that, at least for the time being.</pre>
</blockquote>
</blockquote>
<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 am ok with that - it's just not very beautiful.</pre>
<br />
<p>- Dennis</p>
<br />
<p>On June 14th, 2014, 10:12 p.m. UTC, Dennis Guse wrote:</p>
<table bgcolor="#fefadf" width="100%" cellspacing="0" cellpadding="8" style="background-image: url('https://reviewboard.asterisk.org/static/rb/images/review_request_box_top_bg.ab6f3b1072c9.png'); background-position: left top; background-repeat: repeat-x; border: 1px black solid;">
<tr>
<td>
<div>Review request for Asterisk Developers.</div>
<div>By Dennis Guse.</div>
<p style="color: grey;"><i>Updated June 14, 2014, 10:12 p.m.</i></p>
<div style="margin-top: 1.5em;">
<b style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Bugs: </b>
<a href="https://issues.asterisk.org/jira/browse/ASTERISK-20696">ASTERISK-20696</a>,
<a href="https://issues.asterisk.org/jira/browse/ASTERISK-23836">ASTERISK-23836</a>
</div>
<div style="margin-top: 1.5em;">
<b style="color: #575012; font-size: 10pt;">Repository: </b>
Asterisk
</div>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" style="border: 1px solid #b8b5a0">
<tr>
<td>
<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;">Target: app_jack.c
Enables the jack-audiohook to cope with dynamic sampling rates from and to Asterisk.
Information from channel is taken to derive the channel's sampling rate, suiting SLINxx format and frame->datalen.
Limitations:
* Required information is taken from channel during initialization as audiohook does not provide this information then. Audiohook.internal_sampl_rate(...) is set later, but no callback is available to inform app_jack.
* Frame.datalen is computed using "rate / 50" assuming a ptime of 20ms.
There is no internal API available to determine datalen for a SLINxx.
* Ringbuffer size is a DEFINE and thus must be quite big to be able to cope with 16Khz+</pre>
</td>
</tr>
</table>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Testing </h1>
<table width="100%" bgcolor="#ffffff" cellspacing="0" cellpadding="10" style="border: 1px solid #b8b5a0">
<tr>
<td>
<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;">Checked with jackd and puredata using G.711 and G.722 on Ubuntu 14.0.4 64bit using Linphone and Ekiga.</pre>
</td>
</tr>
</table>
<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
<ul style="margin-left: 3em; padding-left: 0;">
<li>/trunk/apps/app_jack.c <span style="color: grey">(415578)</span></li>
</ul>
<p><a href="https://reviewboard.asterisk.org/r/3618/diff/" style="margin-left: 3em;">View Diff</a></p>
</td>
</tr>
</table>
</div>
</body>
</html>