1 /*  This file is part of the KDE project.

     2 

     3     Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

     4 

     5     This library is free software: you can redistribute it and/or modify

     6     it under the terms of the GNU Lesser General Public License as published by

     7     the Free Software Foundation, either version 2.1 or 3 of the License.

     8 

     9     This library is distributed in the hope that it will be useful,

    10     but WITHOUT ANY WARRANTY; without even the implied warranty of

    11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    12     GNU Lesser General Public License for more details.

    13 

    14     You should have received a copy of the GNU Lesser General Public License

    15     along with this library.  If not, see <http://www.gnu.org/licenses/>.

    16 */

    17 

    18 #include <gst/interfaces/propertyprobe.h>

    19 #include "effectmanager.h"

    20 #include "backend.h"

    21 #include "gsthelper.h"

    22 

    23 /*

    24  * This class manages the list of currently

    25  * available audio effects.

    26  */

    27 

    28 QT_BEGIN_NAMESPACE

    29 

    30 namespace Phonon

    31 {

    32 namespace Gstreamer

    33 {

    34 

    35 EffectInfo::EffectInfo(const QString &name, const QString&description, const QString&author)

    36         : m_name(name)

    37         , m_description(description)

    38         , m_author(author) {}

    39 

    40 EffectManager::EffectManager(Backend *backend)

    41         : QObject(backend)

    42         , m_backend(backend)

    43 {

    44     GList* factoryList = gst_registry_get_feature_list(gst_registry_get_default (), GST_TYPE_ELEMENT_FACTORY);

    45     QString name, klass, description, author;

    46     for (GList* iter = g_list_first(factoryList) ; iter != NULL ; iter = g_list_next(iter)) {

    47         GstPluginFeature *feature = GST_PLUGIN_FEATURE(iter->data);

    48         klass = gst_element_factory_get_klass(GST_ELEMENT_FACTORY(feature));

    49         if ( klass == "Filter/Effect/Audio" ) {

    50             name =  GST_PLUGIN_FEATURE_NAME(feature);

    51 

    52             // These plugins simply make no sense to the frontend:

    53             // "audiorate" Should be internal

    54             // "volume" not needed

    55             // "equalizer-nbands" not really useful at the moment

    56 

    57             // These plugins simply dont work or have major stability issues:

    58             // "iir" Does not seem to do much at the moment

    59             // "audioinvert" Only works for some streams, should be invesigated

    60             // "lpwsinc" Crashes for large values of filter kernel

    61             // "name" Crashes for large values of filter kernel

    62             

    63             // Seems to be working, but not well tested:

    64             // name == "rglimiter" Seems functional

    65             // name == "rgvolume" Seems to be working

    66 

    67             QString pluginString = qgetenv("PHONON_GST_ALL_EFFECTS");

    68             bool acceptAll = pluginString.toInt();

    69 

    70             if (acceptAll 

    71                 // Plugins that have been accepted so far

    72                  || name == "audiopanorama" 

    73                  || name == "audioamplify" 

    74                  || name == "audiodynamic" 

    75                  || name == "equalizer-10bands" 

    76                  || name == "speed") 

    77                 {

    78                     description = gst_element_factory_get_description (GST_ELEMENT_FACTORY(feature));

    79                     author = gst_element_factory_get_author (GST_ELEMENT_FACTORY(feature));

    80                     EffectInfo *effect = new EffectInfo(name, description, author);

    81                     m_audioEffectList.append(effect);

    82             }

    83         }

    84     }

    85     g_list_free(factoryList);

    86 }

    87 

    88 EffectManager::~EffectManager()

    89 {

    90     qDeleteAll(m_audioEffectList);

    91     m_audioEffectList.clear();

    92 }

    93 

    94 /**

    95   * Returns a list of available audio effects

    96   */

    97 const QList<EffectInfo*> EffectManager::audioEffects() const

    98 {

    99     return m_audioEffectList;

   100 }

   101 

   102 }

   103 }

   104 

   105 QT_END_NAMESPACE