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List: amarok-devel
Subject: Re: Review Request: MusicBrainz and MusicDNS services support
From: "Sergey Ivanov" <123kash () gmail ! com>
Date: 2010-09-24 5:54:53
Message-ID: 20100924055453.28518.22170 () vidsolbach ! de
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> On 2010-09-22 02:22:07, Leo Franchi wrote:
> > src/CMakeLists.txt, line 791
> > <http://git.reviewboard.kde.org/r/100000/diff/1/?file=6#file6line791>
> >
> > I'm not sure about the hard dependency of Xine. We don't depend on any particular audio backend since \
> > we use Phonon---what is the feasibility of using Phonon's AudioDataOutput for extracting the audio \
> > data, do you know? Some Amarok devs have been looking in to using it for audio fingerprinting, but it \
> > wasn't completely bug-free last I checked.
>
> Sergey Ivanov wrote:
> I didn't know that Phonon has such class, thank you.
>
> Sergey Ivanov wrote:
> Hmm, i can not find any way to make it just "dump" decoded date, everything this class can supply - \
> dumps currently played portions of a track. And i didn't find a way to control playback to make It \
> faster in case of decoding. Guess I have to find another way.
>
> Leo Franchi wrote:
> Yeah i'm not so sure how well this will work. I don't mind the Xine dependency as long as (a) it's very \
> clear it depends on Xine (b) There are CMakeLists checks for xine that enable it only if Xine is found, \
> and disable it if Xine is not found. I don't know wh at the rest of the team thinks.
> Mark Kretschmann wrote:
> I'm not keen on the xine dependency. First of all xine is hardly maintained (they have like one \
> developer left or so), which poses problems with bit-rot and possibly security issues. Then, it _is_ an \
> extra dependency, with a whole slew of implicit dependencies that xine pulls in. Next issue, is xine \
> cross-platform? Last I checked it did not run on Windows, and that automatically rules it out.
> So I realize that Phonon is unfortunately (not yet?) up to the task. We should talk to the Phonon devs \
> about a possible extension here.
> As an alternative, how about using FFmpeg? We already depend on it for Teo's Transcoding patch. It's \
> cross-platform. It's well maintained, and widely available on all distros. Sounds like a good match to \
> me!
Already began to rewrite it to using separate libraries (libmad, flac, libogg etc..), so there is no more \
hard xine dependence. Btw found out that in last (mb both posted) diffs, checks for libofa availability \
was missed from CMake script.
- Sergey
-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
http://git.reviewboard.kde.org/r/100000/#review6
-----------------------------------------------------------
On 2010-09-22 09:23:42, Sergey Ivanov wrote:
>
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> http://git.reviewboard.kde.org/r/100000/
> -----------------------------------------------------------
>
> (Updated 2010-09-22 09:23:42)
>
>
> Review request for amarok.
>
>
> Summary
> -------
>
> MusicBrainz and MusicDNS services support implementation.
> There are three independent parts:
> 1. MusicBrainzFinder class - used to make requests to MusicBrainz server and process replies. All \
> relies process in separate threads by MusicBrainzXmlParser class. For a search uses guessed from a file \
> name track information. No external dependences required. 2. MusicDNSFinder class - used for the same \
> purpose as MusicBrainzFinder, but i communicate with musicdns server and receives track's PUID as a \
> reply. Replies ether process in separate threads by MusicDNSXmlParser class. Fingerprints generated by \
> libofa (the only external dependence in entire patch). For track decompressing (MusicDNSAudioDecoder \
> class) used xine engine (I'm not sure is It a good choice, but amarok based on phonon media-engine, \
> that uses xine. So we don't deed to pull any other dependences). Received PUIDs sends to \
> MusicBrainzFinder class, for a search routine. 3. View. All classes used for store \
> (MusicBrainzTagsModel, MusicBrainzTrackListModel) and display (MusicBrainzTagsModelDelegate) purposes.
>
> Diffs
> -----
>
> CMakeLists.txt 191b02e
> cmake/modules/FindLibOFA.cmake PRE-CREATION
> config-amarok.h.cmake 981b7b7
> src/CMakeLists.txt 42614ff
> src/core-impl/capabilities/timecode/TimecodeEditCapability.h 6e15303
> src/core-impl/capabilities/timecode/TimecodeEditCapability.cpp 8205d45
> src/core-impl/collections/mediadevicecollection/MediaDeviceMeta.h e35b57f
> src/core-impl/collections/mediadevicecollection/MediaDeviceMeta.cpp 9be62d9
> src/core-impl/collections/proxycollection/ProxyCollectionMeta.cpp 8bdbf75
> src/core-impl/collections/sqlcollection/CapabilityDelegateImpl.cpp b5cb083
> src/core-impl/collections/sqlcollection/SqlMeta.h ee3ec21
> src/core-impl/collections/sqlcollection/SqlMeta.cpp 2da0333
> src/core-impl/meta/file/File.h 6d4d395
> src/core-impl/meta/file/File.cpp 30cd2ff
> src/core-impl/meta/file/TagLibUtils.cpp 15b64a4
> src/core-impl/meta/proxy/MetaProxy.h 2ef3805
> src/core-impl/meta/proxy/MetaProxy.cpp 341e076
> src/core/capabilities/EditCapability.h 79344bd
> src/dialogs/MusicBrainzTagger.h PRE-CREATION
> src/dialogs/MusicBrainzTagger.cpp PRE-CREATION
> src/dialogs/MusicBrainzTagger.ui PRE-CREATION
> src/dialogs/TagDialog.h 50cd801
> src/dialogs/TagDialog.cpp 68fc5e3
> src/dialogs/TagDialogBase.ui 9974d0b
> src/musicbrainz/MusicBrainzFinder.h PRE-CREATION
> src/musicbrainz/MusicBrainzFinder.cpp PRE-CREATION
> src/musicbrainz/MusicBrainzMetaClasses.h PRE-CREATION
> src/musicbrainz/MusicBrainzMetaClasses.cpp PRE-CREATION
> src/musicbrainz/MusicBrainzTagsModel.h PRE-CREATION
> src/musicbrainz/MusicBrainzTagsModel.cpp PRE-CREATION
> src/musicbrainz/MusicBrainzTagsModelDelegate.h PRE-CREATION
> src/musicbrainz/MusicBrainzTagsModelDelegate.cpp PRE-CREATION
> src/musicbrainz/MusicBrainzTrackListModel.h PRE-CREATION
> src/musicbrainz/MusicBrainzTrackListModel.cpp PRE-CREATION
> src/musicbrainz/MusicBrainzXmlParser.h PRE-CREATION
> src/musicbrainz/MusicBrainzXmlParser.cpp PRE-CREATION
> src/musicbrainz/MusicDNSAudioDecoder.h PRE-CREATION
> src/musicbrainz/MusicDNSAudioDecoder.cpp PRE-CREATION
> src/musicbrainz/MusicDNSFinder.h PRE-CREATION
> src/musicbrainz/MusicDNSFinder.cpp PRE-CREATION
> src/musicbrainz/MusicDNSXmlParser.h PRE-CREATION
> src/musicbrainz/MusicDNSXmlParser.cpp PRE-CREATION
> tests/core-impl/collections/proxycollection/TestProxyCollectionMeta.cpp 55d1914
>
> Diff: http://git.reviewboard.kde.org/r/100000/diff
>
>
> Testing
> -------
>
>
> Thanks,
>
> Sergey
>
>
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This is an automatically generated e-mail. To reply, visit:
<a href="http://git.reviewboard.kde.org/r/100000/">http://git.reviewboard.kde.org/r/100000/</a>
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<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
<p style="margin-top: 0;">On September 22nd, 2010, 2:22 a.m., <b>Leo Franchi</b> wrote:</p>
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
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<th colspan="4" bgcolor="#F0F0F0" style="border-bottom: 1px solid #C0C0C0; font-size: 9pt; padding: \
4px 8px; text-align: left;"> <a href="/r/100000/diff/1/?file=6#file6line791" style="color: black; \
font-weight: bold; text-decoration: underline;">src/CMakeLists.txt</a> <span style="font-weight: \
normal;">
(Diff revision 1)
</span>
</th>
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<tbody style="background-color: #e4d9cb; padding: 4px 8px; text-align: center;">
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "></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">791</font></th> <td bgcolor="#c5ffc4" width="50%"><pre \
style="font-size: 8pt; line-height: 140%; margin: 0; "> xine</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'm not sure about the hard dependency of Xine. We don't \
depend on any particular audio backend since we use Phonon---what is the feasibility of using \
Phonon's AudioDataOutput for extracting the audio data, do you know? Some Amarok devs have been \
looking in to using it for audio fingerprinting, but it wasn't completely bug-free last I \
checked.</pre> </blockquote>
<p>On September 22nd, 2010, 9:28 a.m., <b>Sergey Ivanov</b> wrote:</p>
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
<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 know that Phonon has such class, thank you.</pre> \
</blockquote>
<p>On September 22nd, 2010, 12:01 p.m., <b>Sergey Ivanov</b> wrote:</p>
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: \
-o-pre-wrap; word-wrap: break-word;">Hmm, i can not find any way to make it just "dump" decoded \
date, everything this class can supply - dumps currently played portions of a track. And i didn't \
find a way to control playback to make It faster in case of decoding. Guess I have to find another \
way.</pre> </blockquote>
<p>On September 24th, 2010, 1:11 a.m., <b>Leo Franchi</b> wrote:</p>
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: \
-o-pre-wrap; word-wrap: break-word;">Yeah i'm not so sure how well this will work. I don't mind \
the Xine dependency as long as (a) it's very clear it depends on Xine (b) There are CMakeLists checks \
for xine that enable it only if Xine is found, and disable it if Xine is not found. I don't know wh \
at the rest of the team thinks.</pre> </blockquote>
<p>On September 24th, 2010, 5:17 a.m., <b>Mark Kretschmann</b> wrote:</p>
<blockquote style="margin-left: 1em; border-left: 2px solid #d0d0d0; padding-left: 10px;">
<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'm not keen on the xine dependency. First of all xine is hardly \
maintained (they have like one developer left or so), which poses problems with bit-rot and possibly \
security issues. Then, it _is_ an extra dependency, with a whole slew of implicit dependencies that xine \
pulls in. Next issue, is xine cross-platform? Last I checked it did not run on Windows, and that \
automatically rules it out.
So I realize that Phonon is unfortunately (not yet?) up to the task. We should talk to the Phonon devs \
about a possible extension here.
As an alternative, how about using FFmpeg? We already depend on it for Teo's Transcoding patch. \
It's cross-platform. It's well maintained, and widely available on all distros. Sounds like a \
good match to me! </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;">Already began to rewrite it to using separate libraries \
(libmad, flac, libogg etc..), so there is no more hard xine dependence. Btw found out that in last (mb \
both posted) diffs, checks for libofa availability was missed from CMake script.</pre> <br />
<p>- Sergey</p>
<br />
<p>On September 22nd, 2010, 9:23 a.m., Sergey Ivanov wrote:</p>
<table bgcolor="#fefadf" width="100%" cellspacing="0" cellpadding="8" style="background-image: \
url('http://git.reviewboard.kde.orgrb/images/review_request_box_top_bg.png'); background-position: left \
top; background-repeat: repeat-x; border: 1px black solid;"> <tr>
<td>
<div>Review request for amarok.</div>
<div>By Sergey Ivanov.</div>
<p style="color: grey;"><i>Updated 2010-09-22 09:23:42</i></p>
<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>
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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;">MusicBrainz and MusicDNS services support \
implementation. There are three independent parts:
1. MusicBrainzFinder class - used to make requests to MusicBrainz server and process replies. All relies \
process in separate threads by MusicBrainzXmlParser class. For a search uses guessed from a file name \
track information. No external dependences required. 2. MusicDNSFinder class - used for the same purpose \
as MusicBrainzFinder, but i communicate with musicdns server and receives track's PUID as a reply. \
Replies ether process in separate threads by MusicDNSXmlParser class. Fingerprints generated by libofa \
(the only external dependence in entire patch). For track decompressing (MusicDNSAudioDecoder class) used \
xine engine (I'm not sure is It a good choice, but amarok based on phonon media-engine, that uses \
xine. So we don't deed to pull any other dependences). Received PUIDs sends to MusicBrainzFinder \
class, for a search routine. 3. View. All classes used for store (MusicBrainzTagsModel, \
MusicBrainzTrackListModel) and display (MusicBrainzTagsModelDelegate) purposes.</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>CMakeLists.txt <span style="color: grey">(191b02e)</span></li>
<li>cmake/modules/FindLibOFA.cmake <span style="color: grey">(PRE-CREATION)</span></li>
<li>config-amarok.h.cmake <span style="color: grey">(981b7b7)</span></li>
<li>src/CMakeLists.txt <span style="color: grey">(42614ff)</span></li>
<li>src/core-impl/capabilities/timecode/TimecodeEditCapability.h <span style="color: \
grey">(6e15303)</span></li>
<li>src/core-impl/capabilities/timecode/TimecodeEditCapability.cpp <span style="color: \
grey">(8205d45)</span></li>
<li>src/core-impl/collections/mediadevicecollection/MediaDeviceMeta.h <span style="color: \
grey">(e35b57f)</span></li>
<li>src/core-impl/collections/mediadevicecollection/MediaDeviceMeta.cpp <span style="color: \
grey">(9be62d9)</span></li>
<li>src/core-impl/collections/proxycollection/ProxyCollectionMeta.cpp <span style="color: \
grey">(8bdbf75)</span></li>
<li>src/core-impl/collections/sqlcollection/CapabilityDelegateImpl.cpp <span style="color: \
grey">(b5cb083)</span></li>
<li>src/core-impl/collections/sqlcollection/SqlMeta.h <span style="color: grey">(ee3ec21)</span></li>
<li>src/core-impl/collections/sqlcollection/SqlMeta.cpp <span style="color: grey">(2da0333)</span></li>
<li>src/core-impl/meta/file/File.h <span style="color: grey">(6d4d395)</span></li>
<li>src/core-impl/meta/file/File.cpp <span style="color: grey">(30cd2ff)</span></li>
<li>src/core-impl/meta/file/TagLibUtils.cpp <span style="color: grey">(15b64a4)</span></li>
<li>src/core-impl/meta/proxy/MetaProxy.h <span style="color: grey">(2ef3805)</span></li>
<li>src/core-impl/meta/proxy/MetaProxy.cpp <span style="color: grey">(341e076)</span></li>
<li>src/core/capabilities/EditCapability.h <span style="color: grey">(79344bd)</span></li>
<li>src/dialogs/MusicBrainzTagger.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>src/dialogs/MusicBrainzTagger.cpp <span style="color: grey">(PRE-CREATION)</span></li>
<li>src/dialogs/MusicBrainzTagger.ui <span style="color: grey">(PRE-CREATION)</span></li>
<li>src/dialogs/TagDialog.h <span style="color: grey">(50cd801)</span></li>
<li>src/dialogs/TagDialog.cpp <span style="color: grey">(68fc5e3)</span></li>
<li>src/dialogs/TagDialogBase.ui <span style="color: grey">(9974d0b)</span></li>
<li>src/musicbrainz/MusicBrainzFinder.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>src/musicbrainz/MusicBrainzFinder.cpp <span style="color: grey">(PRE-CREATION)</span></li>
<li>src/musicbrainz/MusicBrainzMetaClasses.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>src/musicbrainz/MusicBrainzMetaClasses.cpp <span style="color: grey">(PRE-CREATION)</span></li>
<li>src/musicbrainz/MusicBrainzTagsModel.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>src/musicbrainz/MusicBrainzTagsModel.cpp <span style="color: grey">(PRE-CREATION)</span></li>
<li>src/musicbrainz/MusicBrainzTagsModelDelegate.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>src/musicbrainz/MusicBrainzTagsModelDelegate.cpp <span style="color: \
grey">(PRE-CREATION)</span></li>
<li>src/musicbrainz/MusicBrainzTrackListModel.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>src/musicbrainz/MusicBrainzTrackListModel.cpp <span style="color: grey">(PRE-CREATION)</span></li>
<li>src/musicbrainz/MusicBrainzXmlParser.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>src/musicbrainz/MusicBrainzXmlParser.cpp <span style="color: grey">(PRE-CREATION)</span></li>
<li>src/musicbrainz/MusicDNSAudioDecoder.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>src/musicbrainz/MusicDNSAudioDecoder.cpp <span style="color: grey">(PRE-CREATION)</span></li>
<li>src/musicbrainz/MusicDNSFinder.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>src/musicbrainz/MusicDNSFinder.cpp <span style="color: grey">(PRE-CREATION)</span></li>
<li>src/musicbrainz/MusicDNSXmlParser.h <span style="color: grey">(PRE-CREATION)</span></li>
<li>src/musicbrainz/MusicDNSXmlParser.cpp <span style="color: grey">(PRE-CREATION)</span></li>
<li>tests/core-impl/collections/proxycollection/TestProxyCollectionMeta.cpp <span style="color: \
grey">(55d1914)</span></li>
</ul>
<p><a href="http://git.reviewboard.kde.org/r/100000/diff/" style="margin-left: 3em;">View Diff</a></p>
</td>
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