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This is an automatically generated e-mail. To reply, visit:
<a href="https://reviewboard.asterisk.org/r/3365/">https://reviewboard.asterisk.org/r/3365/</a>
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<p style="margin-top: 0;">On March 17th, 2014, 2:12 a.m. CDT, <b>Olle E Johansson</b> wrote:</p>
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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;">That Asterisk *needs* audio was not true before. If it is, then we've broken things. When I worked with T.140 realtime text we made it possible to place calls with video and text, no audio. It took a while, but it did work in a few releases. Have no test software at this moment, but if that statement is true we have a problem.</pre>
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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;">Well, real-time text isn't really applicable here, as that support hasn't been added to the PJSIP channel driver.
Video only is something that is a bit ... odd ... in Asterisk. I'm sure it worked better at one point in time, but it's probably been a long time since it worked correctly - and consistently - in all applications. I have a feeling that the translation core is most likely to blame for something in there.
This patch is really due to a lot of tests I'm writing to support Josh's format work; that may end up precluding the need for this in the first place. I'm happy to pull it for now - we'll see if we can't find what is wonky.</pre>
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<p>- Matt</p>
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<p>On March 16th, 2014, 3:36 p.m. CDT, Matt Jordan wrote:</p>
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<div>Review request for Asterisk Developers and Joshua Colp.</div>
<div>By Matt Jordan.</div>
<p style="color: grey;"><i>Updated March 16, 2014, 3:36 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;">In a perfect world, an Asterisk channel would care very little (if at all) about the media streams that happened to be related to it. It would merrily exist as a path of communication between some endpoint and Asterisk, and the data (which may or may not be media at all!) that flowed (like a stream!) between the endpoint and Asterisk would be a completely separate concept. Alas, such is not the world we exist in. Asterisk *needs* audio. As frames. At a nice periodic rate, please. Strange things happen when it doesn't get it.
Today, the res_pjsip stack will do some funky things if you give it an offer with no media. There will be a slew of warnings, some compatibility errors, strange transcoding attempts, and finally you may get an Answer to the Offer that contains an audio codec in a video media stream (probably ulaw) - just because Asterisk *really* wants audio. (Can you please send some with this video?)
This is clearly not right. This patch makes it so that res_pjsip_session looks to see if we have an audio stream (in validate_sdp) and, if not, it declines the offer.
I offer this patch in the hopes that it will some day be removed...</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;">Tests are ongoing. A test has been written that offers only a single video stream. Prior to this patch; hilarity. With this patch, Asterisk rejects the offer with a 488.</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/res/res_pjsip_session.c <span style="color: grey">(410554)</span></li>
<li>/branches/12/res/res_pjsip_sdp_rtp.c <span style="color: grey">(410554)</span></li>
<li>/branches/12/include/asterisk/res_pjsip_session.h <span style="color: grey">(410554)</span></li>
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<p><a href="https://reviewboard.asterisk.org/r/3365/diff/" style="margin-left: 3em;">View Diff</a></p>
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