Add interface for Dbus MPRIS and MacOS MediaPlayer

CMakeLists.txt

@@ -1177,6 +1177,8 @@ add_library(
   src/audio/signalinfo.cpp
   src/audio/streaminfo.cpp
   src/audio/types.cpp
+  src/broadcast/metadatabroadcast.cpp
+  src/broadcast/scrobblingmanager.cpp
   src/control/control.cpp
   src/control/controlaudiotaperpot.cpp
   src/control/controlbehavior.cpp
@@ -1537,6 +1539,8 @@ add_library(
   src/preferences/dialog/dlgprefkeydlg.ui
   src/preferences/dialog/dlgpreflibrary.cpp
   src/preferences/dialog/dlgpreflibrarydlg.ui
+  src/preferences/dialog/dlgprefmetadata.cpp
+  src/preferences/dialog/dlgprefmetadatadlg.ui
   src/preferences/dialog/dlgprefmixer.cpp
   src/preferences/dialog/dlgprefmixerdlg.ui
   src/preferences/dialog/dlgprefrecord.cpp
@@ -1618,9 +1622,11 @@ add_library(
   src/track/trackinfo.cpp
   src/track/trackmetadata.cpp
   src/track/tracknumbers.cpp
+  src/track/trackplaytimers.cpp
   src/track/trackrecord.cpp
   src/track/trackref.cpp
   src/util/autofilereloader.cpp
+  src/track/tracktiminginfo.cpp
   src/util/battery/battery.cpp
   src/util/cache.cpp
   src/util/clipboard.cpp
@@ -2105,6 +2111,16 @@ if(APPLE)
       target_link_libraries(mixxx-lib PRIVATE "-weak_framework iTunesLibrary")
       target_compile_definitions(mixxx-lib PUBLIC __MACOS_ITUNES_LIBRARY__)
     endif()
+
+    option(MACOS_MEDIAPLAYER "macOS media player integration" ON)
+    if(MACOS_MEDIAPLAYER)
+      target_sources(
+        mixxx-lib
+        PRIVATE src/broadcast/macos/macosmediaplayerservice.mm
+      )
+      target_link_libraries(mixxx-lib PRIVATE "-weak_framework MediaPlayer")
+      target_compile_definitions(mixxx-lib PUBLIC __MACOS_MEDIAPLAYER__)
+    endif()
   endif()
 
   option(AU_EFFECTS "Audio Unit (AU) effects integration" ON)
@@ -2125,6 +2141,25 @@ if(APPLE)
   endif()
 endif()
 
+if(UNIX AND NOT APPLE AND NOT ANDROID)
+  # MPRIS implementation using QtDbus
+  option(MPRIS "MPRIS implementation using QtDbus" ON)
+  if(MPRIS)
+    target_sources(
+      mixxx-lib
+      PRIVATE
+        src/broadcast/mpris/mediaplayer2.cpp
+        src/broadcast/mpris/mediaplayer2player.cpp
+        src/broadcast/mpris/mediaplayer2playlists.cpp
+        src/broadcast/mpris/mediaplayer2tracklist.cpp
+        src/broadcast/mpris/mpris.cpp
+        src/broadcast/mpris/mprisplayer.cpp
+        src/broadcast/mpris/mprisservice.cpp
+    )
+    target_compile_definitions(mixxx-lib PUBLIC __MPRIS__)
+  endif()
+endif()
+
 if(EMSCRIPTEN)
   # We need asyncify to support asynchronous calls (e.g. QDialog::exec)
   # when targeting Emscripten/WebAssembly.
@@ -3690,6 +3725,9 @@ set(
   Xml
 )
 set(QT_EXTRA_COMPONENTS "")
+if(MPRIS)
+  list(APPEND QT_EXTRA_COMPONENTS "DBus")
+endif()
 if(QT6)
   find_package(QT 6.2 NAMES Qt6 COMPONENTS Core REQUIRED)
   list(APPEND QT_EXTRA_COMPONENTS "ShaderTools")

res/mixxx.qrc

@@ -105,5 +105,6 @@
         <file>shaders/passthrough.vert</file>
         <file>shaders/rgbsignal.frag</file>
         <file>shaders/stackedsignal.frag</file>
+        <file>images/icons/128x128/apps/mixxx.png</file>
     </qresource>
 </RCC>

src/broadcast/macos/macosmediaplayerservice.h

@@ -0,0 +1,64 @@
+#pragma once
+
+#include <QList>
+#include <QObject>
+
+#include "broadcast/scrobblingservice.h"
+#include "control/controlproxy.h"
+#include "library/autodj/autodjprocessor.h"
+#include "library/coverart.h"
+#include "mixer/playermanager.h"
+#include "util/cache.h"
+
+/// A service that interfaces with macOS's media controls and allows the user to
+/// view and control the playback through the system-wide control center, media
+/// keys etc.
+class MacOSMediaPlayerService : public ScrobblingService {
+    Q_OBJECT
+  public:
+    MacOSMediaPlayerService(PlayerManagerInterface* pPlayerManager);
+
+  public slots:
+    /// Sends the updated track info to the external 'now playing' center.
+    void slotBroadcastCurrentTrack(TrackPointer pTrack) override;
+    /// Notifies the external 'now playing' center that all tracks are paused.
+    void slotAllTracksPaused() override;
+    /// Unused
+    void slotScrobbleTrack(TrackPointer) override {
+    }
+
+  private:
+    std::vector<std::unique_ptr<DeckAttributes>> m_deckAttributes;
+    ControlProxy* m_pCPAutoDjEnabled;
+    ControlProxy* m_pCPFadeNow;
+    double m_lastSentPosition;
+
+    /// Sets up the callbacks for controlling playback externally.
+    void setupCommandHandlers();
+
+    /// Fetches the currently playing deck. Returns a `nullptr` if nothing plays.
+    DeckAttributes* getCurrentDeck();
+    /// Checks whether the given deck is the currently playing one.
+    bool isCurrentDeck(DeckAttributes* attributes);
+
+    /// Called when the play state is toggled externally. Returns whether this was successful.
+    bool togglePlayState();
+    /// Called when the play state is changed externally. Returns whether this was successful.
+    bool updatePlayState(bool playing);
+    /// Called when the play position is changed externally. Returns whether this was successful.
+    bool updatePlayPosition(double absolutePosition);
+    /// Called when the user skips to the next track externally. Returns whether
+    /// this was successful.
+    bool skipToNextTrack();
+
+  private slots:
+    /// Notifies the external 'now playing' center that the play state of some deck has changed.
+    void slotPlayChanged(DeckAttributes* attributes, bool playing);
+    /// Notifies the external 'now playing' center that the play position of some deck has changed.
+    void slotPlayPositionChanged(DeckAttributes* attributes, double position);
+
+    /// Updates the cover art if needed.
+    void slotCoverFound(const QObject* pRequestor,
+            const CoverInfo& coverInfo,
+            const QPixmap& pixmap);
+};