Report current track via MPRIS DBus interface

[mixxxbot]

Reported by: daschuer Date: 2014-06-05T06:07:25Z Status: In Progress Importance: Wishlist Launchpad Issue: lp1326653

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This is a follow up from this bug: Bug #⁠1326596

It would be nice if we report the current track via MPRIS DBus interface.

See: Qt's QDBus* classes http://qt-project.org/doc/qt-4.8/qtdbus.html https://code.google.com/p/qmmp/source/browse/branches/qmmp-0.5/src/plugins/General/mpris/mpris.cpp?r=2132

Related: Bug #⁠918199

[mixxxbot]

Commented by: shwan-ciyako Date: 2015-01-26T13:50:38Z

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Hi Daniel I am very interested in solving this situation, have a friend that might be able to help me out in putting together some code, but if I am going to try doing it by myself, as I am a hardware engineer, this will take me time without help. My current idea was to add that in the autodj part of the code. you said that QT has support for it. is there any file in the source of Mixxx that handles the data I want to get that you can pint me to? giving a guide/idea about where in the source and what to edit and kind of suggestion about the implementation will probably help me out a lot on the way.

We would like to knoe at least the comming 10 songs, or minimal the playing and next deck, using 4 decks also is an option .

[mixxxbot]

Commented by: mikael-holber Date: 2015-01-26T14:08:14Z

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The list of information we request (also applies to COM-server and applescript/scriptbridge) are:

Artist AlbumArtist Album Title Genre Year Performer Comment Composer fileURL

[mixxxbot]

Commented by: daschuer Date: 2015-01-26T14:44:07Z

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Hi Shwan,

cool!

First you should make sure you environment is prepared. Are you able to build the latest master and are you able to single step though the code? This link may help getting you up http://www.mixxx.org/wiki/doku.php/bugfix_workflow otherwise just ask.

I think the MPRIS clients expect a single player like all other media players. For your requirements it seams to be the best to let the clients believe that Mixxx is such a player. We can only predict the next track reliable when Auto DJ is enabled. In this state, the next tracks is loaded to a deck but still on top of the Auto DJ play list. So there is no need to deal with four decks.

The current playing deck, you will get from the PlayerInfo::getCurrentPlayingTrack a singelton class in src/playerinfo.cpp To implement only this seams to be a reasonable fist step.

For the following tracks you may interface somehow with the AutoDJ src/library/autodj/autodjprocessor.cpp the tracks are located in m_pAutoDJTableModel

I have not much experience with DBus, but this seams to be a good tutorial:
https://techbase.kde.org/Development/Tutorials#D-Bus

Hope that helps.

[mixxxbot]

Commented by: daschuer Date: 2015-01-26T14:50:34Z

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This may help as well: https://github.com/mixxxdj/mixxx/blob/a74c65d6469a2f1ce0d1927ffbd73be90bf754c5/src/engine/sidechain/enginerecord.cpp#L124

The list of information we request ...

Yes, no problem. You can query all that by pTrack->getXXX() functions.

[mixxxbot]

Commented by: mikael-holber Date: 2015-01-26T14:57:46Z

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Great! I will get both Shwan and Horia working on this ;)

On Mon, Jan 26, 2015 at 3:50 PM, Daniel Schürmann <
<email address hidden>> wrote:

This may help as well:

https://github.com/mixxxdj/mixxx/blob/a74c65d6469a2f1ce0d1927ffbd73be90bf754c5/src/engine/sidechain/enginerecord.cpp#L124

The list of information we request ...

Yes, no problem. You can query all that by pTrack->getXXX() functions.

-- You received this bug notification because you are subscribed to a duplicate bug report (1414572). https://bugs.launchpad.net/bugs/1326653

Title: Report current track via MPRIS DBus interface

To manage notifications about this bug go to: https://bugs.launchpad.net/mixxx/+bug/1326653/+subscriptions

[mixxxbot]

Commented by: daschuer Date: 2015-04-07T09:17:41Z

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Hi holber,

I have got recently a request to interface Mixxx with a beamer. How is the status of this project? Do you need help? Thank you for the updates.

Kind regards,

Daniel

[mixxxbot]

Commented by: mikael-holber Date: 2015-04-07T10:23:18Z

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Hi Daniel,

I tried to mobilize some resources here but with little luck. I do not have any experience with QT so I would need a lot of help. If you could help me it would be great! The project is available at http://www.beam-project.com

We are currently in the process of moving the repository from google-code as they are closing down, so use the binary releases if you want to try it out.

The obvious information we would need is "Current song" which is playing to the public (not headphones). If there is any intuitive way of predicting the next track that will be played (or if it is used in playlist-mode) this would be very useful as well. This is of course complementary information that requires the user to use Mixxx in a specific, predefined way.

The information that our application will access is the following from each song:

Artist AlbumArtist Album Title Genre Year Performer Comment Composer fileURL

We then structure the information as following: CURRENTSONG PREVIOUSSONG NEXTSONG NEXTTANDA%Artist %PreviousArtist %NextArtist %NextTandaArtist%AlbumArtist %PreviousAlbumArtist %NextAlbumArtist %NextTandaAlbumArtist%Album %PreviousAlbum %NextAlbum %NextTandaAlbum%Title %PreviousTitle %NextTitle %NextTandaTitle%Genre %PreviousGenre %NextGenre %NextTandaGenre%Comment %PreviousComment %NextComment %NextTandaComment%Composer %PreviousComposer %NextComposer %NextTandaComposer%Performer %PreviousPerformer %NextPerformer %NextTandaPerformer%Year %PreviousYear %NextYear %NextTandaYear%Singer %PreviousSinger %NextSinger %NextTandaSinger%IsCortina %PreviousIsCortina %NextIsCortina

Previous song is saved in the application, This is not live-information. Current song is obviously current. Next song is read from the playlist. Next tanda is a "tango specific" expression where we locate the next "section" of songs based on some rules.

Hope this helps you understand our intention. We are absolutely willing to adopt Beam to be more general, for this we would need some use-cases.

Best Regards Mikael

On Tue, Apr 7, 2015 at 11:17 AM, Daniel Schürmann <
<email address hidden>> wrote:

Hi holber,

I have got recently a request to interface Mixxx with a beamer. How is the status of this project? Do you need help? Thank you for the updates.

Kind regards,

Daniel

-- You received this bug notification because you are subscribed to a duplicate bug report (1414572). https://bugs.launchpad.net/bugs/1326653

Title: Report current track via MPRIS DBus interface

To manage notifications about this bug go to: https://bugs.launchpad.net/mixxx/+bug/1326653/+subscriptions

[mixxxbot]

Commented by: daschuer Date: 2015-04-07T10:50:43Z

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Thank you for your fast responds.

I will try to give you all the support I can.

What could be the mode in which we can work together? When do you will have time to spend on this? Do you have already a Mixxx building environment? Do you need help to set one up?

[mixxxbot]

Commented by: mikael-holber Date: 2015-04-07T13:41:15Z

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My partner Horia will assist you.

Kind regards Mikael

On Tue, Apr 7, 2015 at 12:50 PM, Daniel Schürmann <
<email address hidden>> wrote:

Thank you for your fast responds.

I will try to give you all the support I can.

What could be the mode in which we can work together? When do you will have time to spend on this? Do you have already a Mixxx building environment? Do you need help to set one up?

-- You received this bug notification because you are subscribed to a duplicate bug report (1414572). https://bugs.launchpad.net/bugs/1326653

Title: Report current track via MPRIS DBus interface

To manage notifications about this bug go to: https://bugs.launchpad.net/mixxx/+bug/1326653/+subscriptions

[mixxxbot]

Commented by: daschuer Date: 2015-04-10T08:45:31Z

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@Horia: Thank you for your help. Pleas contact me to discuss how an when we can start with this.

[mixxxbot]

Commented by: daschuer Date: 2015-04-18T20:58:15Z

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The MPRIS 2.2 stubs are prepared: https://github.com/daschuer/mixxx/tree/mpris/src/mpris

[mixxxbot]

Commented by: daschuer Date: 2015-04-19T11:04:10Z

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Status update: The MPRIS 2.2 interface is installed. The root MediaPlayer2 interface is working. So you can Raise() and Fullscreen() Mixxx remotely The MediaPlayer2.Player interface is working in some places. It is a bit hard to map this interface to the "current" deck, but it should be possible with some effort. I am only not sure if it worth the work, because we have no use case for this. So it is probably a good idea to remain in this state until we have one.

The real valid use case that makes me doing this work is the interface to the beam-project. I have not implemented the meta data interface yet because MPRIS is somehow open how to do it.

@Horia: It is pretty easy to do it on top of my branch. Here you find how to access the track info object: https://github.com/daschuer/mixxx/blob/mpris/src/mpris/mediaplayer2player.cpp#L30 It should contain all metadata required to display the current track. If you need additional help, just ask.

[mixxxbot]

Commented by: horia-uifaleanu Date: 2015-06-08T20:25:26Z

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Hi guys,

I have some time these days and I would be happy to start working on Mixxx's DBus interface.

Daniel could you give me some directions to setup my devenv?!

Horia.

[mixxxbot]

Commented by: daschuer Date: 2015-06-08T21:08:31Z

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Hi Horia,

Great :-D

A good start to read is here: http://www.mixxx.org/wiki/doku.php/bugfix_workflow

Where is the point you need help? Are you familiar with git? Are you able to build Mixxx from the command line? What is your favorite IDE?

Daniel

[mixxxbot]

Commented by: horia-uifaleanu Date: 2015-06-10T21:21:52Z

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Hi,

My first question was aiming at this: http://www.mixxx.org/wiki/doku.php/compiling_on_linux . So it is clear now.

Yes, I am familiar with git, with DBus and with Qt as well. I have just read about Bazaar and perform the necessary setup.

IDE: I like to use Qt Creator even for non-Qt projects

No, I did not managed to build Mixxx from the command line. I got this error:
"horia@horia-ThinkPad-X301:~$ sudo apt-get build-dep mixxx
[sudo] password for horia: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Note, selecting 'libexpat1-dev' instead of 'libexpat-dev'
Note, selecting 'libshout3-dev' instead of 'libshout-dev'
The following packages have unmet dependencies:
 libjack-dev : Depends: libjack0 (= 1:0.121.3+20120418git75e3e20b-2.1ubuntu1) but it is not going to be installed
E: Build-dependencies for mixxx could not be satisfied.
horia@horia-ThinkPad-X301:~$ 
"
Horia

[mixxxbot]

Commented by: daschuer Date: 2015-06-11T06:42:50Z

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I have just read about Bazaar

There is no need to, because we have moved the source entirely to GitHub.

The following packages have unmet dependencies: libjack-dev : Depends: libjack0 (= 1:0.121.3+20120418git75e3e20b-2.1ubuntu1) but it is not going to be installed

Strange, I assume you are on Ubuntu Trusty, like me libjack0 1:0.121.3+20120418git75e3e20b-2.1ubuntu1 is installed.

I can reproduce the issue by installing libjack0

This solves the issue on my system sudo apt-get install libjack-dev libjack0 portaudio19-dev

It looks like there is a kind of package dead lock with jack 1 and 2 I will file a Bug.

[mixxxbot]

Commented by: daschuer Date: 2015-06-11T06:51:48Z

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Bug #⁠1464120

[mixxxbot]

Commented by: horia-uifaleanu Date: 2015-06-11T14:54:06Z

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Hi Daniel,

I managed to build Mixxx on my machine. Now, I want to setup my QtCreator as specified here: http://www.mixxx.org/wiki/doku.php/qtcreator

At a certain point it says:" right click on the top-level directory and select “Add existing files”, and then select SConstruct from the list. Do the same for theSConscripts."

It is my first time wotking with SCons, I found the SConstruct file but did not found SConscripts.

Horia.

[mixxxbot]

Commented by: horia-uifaleanu Date: 2015-06-11T14:53:12Z

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Hi Daniel,

I managed to build Mixxx on my machine. Now, I want to setup my QtCreator as specified here: http://www.mixxx.org/wiki/doku.php/qtcreator

At a certain point it says:" right click on the top-level directory and select “Add existing files”, and then select SConstruct from the list. Do the same for theSConscripts."

It is my first time wotking with SCons, I found the SConstruct file but did not found SConscripts.

Horia.

On Thu, Jun 11, 2015 at 9:51 AM, Daniel Schürmann <
<email address hidden>> wrote:

Bug #⁠1464120

-- You received this bug notification because you are subscribed to the bug report. https://bugs.launchpad.net/bugs/1326653

Title: Report current track via MPRIS DBus interface

Status in Mixxx: In Progress

Bug description: This is a follow up from this bug: Bug #⁠1326596

It would be nice if we report the current track via MPRIS DBus interface.

See: Qt's QDBus* classes http://qt-project.org/doc/qt-4.8/qtdbus.html

https://code.google.com/p/qmmp/source/browse/branches/qmmp-0.5/src/plugins/General/mpris/mpris.cpp?r=2132

Related: Bug #⁠918199

To manage notifications about this bug go to: https://bugs.launchpad.net/mixxx/+bug/1326653/+subscriptions

-- 
Horia Uifaleanu
email: <email address hidden>

[mixxxbot]

Commented by: daschuer Date: 2015-06-11T22:12:17Z

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Sorry, I can't help a lot with Qt Creator. Can one else jump in?

IMHO you do not need to deal with SConstruct and SConscripts. Just replacing "make" with "scons" should work. So you may try to continue with "Adding a build and a clean target"

[mixxxbot]

Commented by: horia-uifaleanu Date: 2015-06-11T22:14:16Z

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Hi Daniel,

One further question: where is the mpris branch you were reffering upper here in the comments?

I can't find it on th eremote repository:

horia@horia-ThinkPad-X301:~/mixxx$ git branch -r
  origin/1.10
  origin/1.11
  origin/1.12
  origin/1.8
  origin/1.9
  origin/HEAD -> origin/master
  origin/master
  origin/memory-leak
  origin/release-1.11.x-translations
  origin/translator-comments
  origin/trunk_translations
horia@horia-ThinkPad-X301:~/mixxx$

Horia.

[mixxxbot]

Commented by: horia-uifaleanu Date: 2015-06-11T22:24:02Z

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Tests:

Are they any tests written or do you have something in mind for the current MPRIS 2.2 stubs you indicated? https://github.com/daschuer/mixxx/tree/mpris/src/mpris

[mixxxbot]

Commented by: daschuer Date: 2015-06-11T22:26:22Z

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You can pull it into your repro like that

git checkout -b mpris master git pull https://github.com/daschuer/mixxx.git mpris

[mixxxbot]

Commented by: daschuer Date: 2015-06-11T22:34:20Z

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Tests:

I have used D-Feet, to check and invoke the DBus functions. I think the reference client is Beamer for now :-)

Maybe we can finally invoke d-Bus command line calls from a Google Test to build unit tests. All other unit tests are located in the src/test

[mixxxbot]

Commented by: horia-uifaleanu Date: 2015-06-11T22:54:47Z

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I will use D-feet for the quick checks.

Google Test: In what regards the other tests, a simple scenario testing would be to create a new DBus session to retrieve the info via the DBus interface and compare the results with the values from the singleton PlayerInfo::getCurrentPlayingTrack. This approach might be suitable for unit tests as well.

MPRIS 2.2 standard: I will start with the entries for the current playing track but basically, on long term, I would like to go on with all the items specified by MPRIS 2.2

[mixxxbot]

Commented by: daschuer Date: 2015-06-12T06:21:50Z

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I will start with the entries for the current playing track but basically, on long term, I would like to go on with all the items specified by MPRIS 2.2

That sounds reasonable. Just make beamer work! ;-) Thank you. 

[mixxxbot]

Commented by: horia-uifaleanu Date: 2015-06-12T12:43:08Z

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Ok! Got it working!

https://drive.google.com/file/d/0B3hQF_jNtG39dldmU3R0Wnl4VGc/view?usp=sharing

[mixxxbot]

Commented by: horia-uifaleanu Date: 2015-06-14T16:04:48Z

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Hi Daniel,

I already have something to commit and for the moment my github username ( horiator ) might not have access yet to https://github.com/daschuer/mixxx.git mpris

Horia.

[mixxxbot]

Commented by: horia-uifaleanu Date: 2015-06-14T16:54:38Z

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Ok. You can ignore my last comment!

I have created a fork and I will issue a pull request.

Horia.

[mixxxbot]

Commented by: rryan Date: 2018-09-20T17:38:38Z

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Due to lack of progress, marking Triaged and clearing assignee. Feel free to revert if it is in fact still in progress :).

[mixxxbot]

Commented by: daschuer Date: 2018-09-20T20:00:03Z

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https://github.com/mixxxdj/mixxx/pull/1675

[acolombier]

Fixed by #3483