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This is an automatically generated e-mail. To reply, visit:
<a href="http://svn.reviewboard.kde.org/r/6587/">http://svn.reviewboard.kde.org/r/6587/</a>
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<p style="margin-top: 0;">On March 5th, 2011, 8:25 a.m., <b>Aaron Seigo</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;">"When I request an source for Mixer, it also adds soucres for controls. And then when I request source for already available Control, it doesn't react anyhow. But when I set "Update every % ms", and click "Reqeust", it works fine."
this is because the data for the control (or at least, the readableName) is set in updateMixerData. then, when it is later requested the DataEngine sees it exists already and so does not call sourceRequestEvent. since there is no poll (time) request, updateSourceEvent isn't called either. when there is a poll time set, then updateSourceEvent is (eventually) called and the data is updated. the fix is to not set any data on the control until such time as a visualization requests it. you can set up the behind-the-scenes objects, but leave the setData calls for the control out of updateMixerData.
there are some memory leaks that need closing as well.
i also recommend, for stylistic reasons, using "natural language" labels rather than camelCaseAsIfItsAFunctionName labels. e.g.: "Controls", "Readable Name", etc.</pre>
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<p>On March 5th, 2011, 9:32 a.m., <b>Igor Poboiko</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;">Big thanks for your review.
I just thought that these things end-user will never see, so there is no reason to set user-friendly labels. But if you suggest so, I'll fix it.
And there is a little problem. For example, user wants to configure visible controls. He goes to settings, and we should show him all available controls (its readable names, maybe icons, etc). To do it we should request sources for every available control. But when I requests source for control, it starts to listen dbus about volume level changes, etc. If such a thing started for every control, it's bad (just because we doesn't need such an information).
The solution I can see for it is to add list of readable mixers names in the same order as its IDs (and maybe icons, and more data user may need) in "mixers" source and to add list of controls readable names (and again, maybe something else) to every mixer source. Will it be a correct solution? And if not, what should I do then?</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;">"end-user will never see"
with DataEngines, it's useful to consider plasmoid developers as their end-users :)
"add list of readable mixers names in the same order as its IDs (and maybe icons, and more data user may need) in "mixers" source and to add list of controls readable names (and again, maybe something else)"
probably not in "mixers", but in the mixer specific source that is set in updateMixerData.</pre>
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<p style="margin-top: 0;">On March 5th, 2011, 8:25 a.m., <b>Aaron Seigo</b> wrote:</p>
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<a href="http://svn.reviewboard.kde.org/r/6587/diff/1/?file=45445#file45445line48" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/KDE/kdemultimedia/kmix/plasma/engine/mixerengine.cpp</a>
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<td colspan="2"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">bool MixerEngine::sourceRequestEvent( const QString &name )</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">name</span> <span class="o">==</span> <span class="s">"KMix"</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="k">return</span> <span class="n">getKMixData</span><span class="p">(</span> <span class="n">name</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;">this is wrong. if the name is "KMix" then the source created _must_ be "KMix", but getKMixData creates/sets "running" and "mixers"
my suggestion: change this to if (name == "mixers")</pre>
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<p>On March 5th, 2011, 9:14 a.m., <b>Igor Poboiko</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;">I didn't understand. It adds only the "KMix" source, and sets "running" and "mixers" data to it. Am I right?</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;">no, it doesn't add the "KMix" source. it adds "running" and "mixers". there is not setData("KMix", ..) calls, so "KMix" is never created! the visualization (e.g. plasmaengineexplorer) asks for "KMix" and the DataEngine instead creates two _other_ sources named "running" and "mixers". "KMix" is never created, and so the visualization does not get the source it requested. the name of the sources created with setData _must_ match the name of source passed in to sourceRequestEvent.
i'd also suggest that it's irrelevant that it's coming from KMix, or any other specific application. the DataEngine should simply expose audio mixer information. where it gets it is irrelevant.
so .. a source called "mixers" should be requested by the visualization and the DataEngine should populate it with the mixers available.</pre>
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<p style="margin-top: 0;">On March 5th, 2011, 8:25 a.m., <b>Aaron Seigo</b> wrote:</p>
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<a href="http://svn.reviewboard.kde.org/r/6587/diff/1/?file=45445#file45445line80" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/KDE/kdemultimedia/kmix/plasma/engine/mixerengine.cpp</a>
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<td colspan="2"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">bool MixerEngine::sourceRequestEvent( const QString &name )</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">setData</span><span class="p">(</span> <span class="n">source</span><span class="p">,</span> <span class="s">"running"</span><span class="p">,</span> <span class="kc">true</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 this matter? if mixers is empty, shouldn't that be enough?</pre>
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<p>On March 5th, 2011, 8:42 a.m., <b>Igor Poboiko</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;">Actually, I think there might be a situation when user just don't have any soundcard (or KMix can't detect any). With this thing we can separate this situation from situation when the KMix isn't running (for example, show different notifications, etc)</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;">that KMix can be not running when this DataEngine is run is a bug. KMix is essentially becoming a service and as such should be started on demand as needed. if it fails to run, then there are no mixers available to the DataEngine. simple as that. anything else is an implementation detail that doesn't need to be exposed.
i do recognize it could be useful for debugging / troubleshooting purposes, but that's not usually a good reason to put a publicly visible source in a DataEngine :)</pre>
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<p style="margin-top: 0;">On March 5th, 2011, 8:25 a.m., <b>Aaron Seigo</b> wrote:</p>
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<a href="http://svn.reviewboard.kde.org/r/6587/diff/1/?file=45445#file45445line118" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/KDE/kdemultimedia/kmix/plasma/engine/mixerengine.cpp</a>
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<td colspan="2"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">bool MixerEngine::sourceRequestEvent( const QString &name )</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">Q_FOREACH</span><span class="p">(</span> <span class="n">MixerInfo</span><span class="o">*</span> <span class="n">mi</span><span class="p">,</span> <span class="n">m_mixers</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="k">if</span> <span class="p">(</span> <span class="n">mi</span><span class="o">-></span><span class="n">id</span> <span class="o">==</span> <span class="n">source</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">curmi</span> <span class="o">=</span> <span class="n">mi</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="k">break</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;">looks like a good candidate for a QHash rather than a QList</pre>
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<p>On March 5th, 2011, 9:29 a.m., <b>Igor Poboiko</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;">I didn't use QHash there because I should search mixer not only by its ID, but also by its DBus path. And I thought it will be a bad idea to have two QHash for both of them.
Moreover, average user have maximum 4-5 mixers (for example, in ALSA KMix backend, one mixer is one soundcard), so it won't be a big speedup if I set it to QHash; and this loop runs few times during the session.</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;">fair enough :)
if it isn't a performance issue, then we don't need to worry about it.
however, just for future reference, you can iterate over a hash just as if it were a list. so you could key the hash by the most commonly looked up key (dbus interface or control ID) and then iterate linearly over the hash for the other case.</pre>
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<p style="margin-top: 0;">On March 5th, 2011, 8:25 a.m., <b>Aaron Seigo</b> wrote:</p>
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<a href="http://svn.reviewboard.kde.org/r/6587/diff/1/?file=45445#file45445line186" style="color: black; font-weight: bold; text-decoration: underline;">/trunk/KDE/kdemultimedia/kmix/plasma/engine/mixerengine.cpp</a>
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<td colspan="2"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">bool MixerEngine::sourceRequestEvent( const QString &name )</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">curci</span> <span class="o">=</span> <span class="k">new</span> <span class="n">ControlInfo</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;">where is this deleted?</pre>
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<p>On March 5th, 2011, 9:32 a.m., <b>Igor Poboiko</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;">Yep, I forgot to delete it. I'll check for every removed control when *changed() DBus signal is emitted and remove unused ControlInfos (and dbus interfaces).</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 also needs to be deleted in the destructor of the DataEngine.</pre>
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<p>- Aaron</p>
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<p>On March 5th, 2011, 7:56 a.m., Igor Poboiko wrote:</p>
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<div>Review request for Plasma and Diego Casella.</div>
<div>By Igor Poboiko.</div>
<p style="color: grey;"><i>Updated March 5, 2011, 7:56 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;">This patch reworks KMix DBus API and adds a plasma dataengine+service as a frontend to information provided by DBus.
New DBus structure is:
- /Mixers
used to get some global information, such as available mixers list and global master mixer
- /Mixers/MIXER_ID
used to get information about mixer with id=MIXER_ID. It provides such information as list of available controls, name of this mixer, id, etc
- /Mixers/MIXER_ID/CONTROL_ID
used to get and set information about control. Such information as volume level, mute, name of control, etc.
It also adds a DBus signals which are emitted when new mixer/control appears, or volume level changes.
It also splits all dbus-related code to separate class, DBus{KMix,Mixer,Control}Wrapper.
The Plasma Dataengine:
By default, the only available source is "KMix". It provides information global information about KMix: is KMix running, and list of available mixers. (its IDs)
Source for every mixer is called by it's ID (for example, "ALSA::HDA_Intel:1"). This source provides such information about current Mixer as: it's readable name, is it opened, its balance and list of available controls. It also adds basic sources for every control, which provides only information about its readable name
Sources for controls are called by 'MIXER_ID/CONTROL_ID' (for example, "ALSA::HDA_Intel:1/Master:0"). If you request this source, it will provide such information as its readable name, is it muted and its volume level (which are updates automatically, using DBus signals).
There is a service available for controls sources. It provides such methods as setVolume() and setMute().
It doesn't close bug 171287, but it becomes one step closer to its solving :)
And, I'm not very familiar with CMake, but it would be great idea to make plasma part optional.
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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;">KMix from KDE SC 4.6.0 compiles ok with this patch, and patch applies to current trunk.
Tested on system with one card and with ALSA backend, so I don't know is plasma dataengine works correctly with plugging/unplugging mixers (but it should).
All DBus methods/properties works fine, signals are emitted, volume can be set using DBus methods.
Plasma dataengine was tested using plasmaengineexplorer.
All works fine except the one thing. When I request an source for Mixer, it also adds soucres for controls. And then when I request source for already available Control, it doesn't react anyhow. But when I set "Update every % ms", and click "Reqeust", it works fine. If I request a source for control BEFORE requesting the source for mixer, all works fine too (without setting "Update every % ms"). I don't know is it a plasmaengineexplorer bug, or my.</pre>
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<b style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Bugs: </b>
<a href="https://bugs.kde.org/show_bug.cgi?id=171287">171287</a>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>/trunk/KDE/kdemultimedia/kmix/CMakeLists.txt <span style="color: grey">(1223790)</span></li>
<li>/trunk/KDE/kdemultimedia/kmix/apps/kmix.cpp <span style="color: grey">(1223790)</span></li>
<li>/trunk/KDE/kdemultimedia/kmix/core/mixdevice.h <span style="color: grey">(1223790)</span></li>
<li>/trunk/KDE/kdemultimedia/kmix/core/mixdevice.cpp <span style="color: grey">(1223790)</span></li>
<li>/trunk/KDE/kdemultimedia/kmix/core/mixer.h <span style="color: grey">(1223790)</span></li>
<li>/trunk/KDE/kdemultimedia/kmix/core/mixer.cpp <span style="color: grey">(1223790)</span></li>
<li>/trunk/KDE/kdemultimedia/kmix/dbus/dbuscontrolwrapper.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>/trunk/KDE/kdemultimedia/kmix/dbus/dbuscontrolwrapper.cpp <span style="color: grey">(PRE-CREATION)</span></li>
<li>/trunk/KDE/kdemultimedia/kmix/dbus/dbusmixerwrapper.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>/trunk/KDE/kdemultimedia/kmix/dbus/dbusmixerwrapper.cpp <span style="color: grey">(PRE-CREATION)</span></li>
<li>/trunk/KDE/kdemultimedia/kmix/dbus/dbusmixsetwrapper.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>/trunk/KDE/kdemultimedia/kmix/dbus/dbusmixsetwrapper.cpp <span style="color: grey">(PRE-CREATION)</span></li>
<li>/trunk/KDE/kdemultimedia/kmix/dbus/org.kde.kmix.control.xml <span style="color: grey">(PRE-CREATION)</span></li>
<li>/trunk/KDE/kdemultimedia/kmix/dbus/org.kde.kmix.mixer.xml <span style="color: grey">(PRE-CREATION)</span></li>
<li>/trunk/KDE/kdemultimedia/kmix/dbus/org.kde.kmix.mixset.xml <span style="color: grey">(PRE-CREATION)</span></li>
<li>/trunk/KDE/kdemultimedia/kmix/plasma/CMakeLists.txt <span style="color: grey">(PRE-CREATION)</span></li>
<li>/trunk/KDE/kdemultimedia/kmix/plasma/engine/CMakeLists.txt <span style="color: grey">(PRE-CREATION)</span></li>
<li>/trunk/KDE/kdemultimedia/kmix/plasma/engine/mixer.operations <span style="color: grey">(PRE-CREATION)</span></li>
<li>/trunk/KDE/kdemultimedia/kmix/plasma/engine/mixerengine.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>/trunk/KDE/kdemultimedia/kmix/plasma/engine/mixerengine.cpp <span style="color: grey">(PRE-CREATION)</span></li>
<li>/trunk/KDE/kdemultimedia/kmix/plasma/engine/mixerservice.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>/trunk/KDE/kdemultimedia/kmix/plasma/engine/mixerservice.cpp <span style="color: grey">(PRE-CREATION)</span></li>
<li>/trunk/KDE/kdemultimedia/kmix/plasma/engine/plasma-engine-mixer.desktop <span style="color: grey">(PRE-CREATION)</span></li>
<li>/trunk/KDE/kdemultimedia/kmix/tests/CMakeLists.txt <span style="color: grey">(1223790)</span></li>
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<p><a href="http://svn.reviewboard.kde.org/r/6587/diff/" style="margin-left: 3em;">View Diff</a></p>
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