Added MidiMessage::isResetAllControllers() method

modules/juce_audio_basics/midi/juce_MidiMessage.cpp

@@ -623,6 +623,12 @@ bool MidiMessage::isAllSoundOff() const noexcept
     return data[1] == 120 && (data[0] & 0xf0) == 0xb0;
 }
 
+bool MidiMessage::isResetAllControllers() const noexcept
+{
+    auto data = getRawData();
+    return (data[0] & 0xf0) == 0xb0 && data[1] == 121;
+}
+
 MidiMessage MidiMessage::allControllersOff (const int channel) noexcept
 {
     return controllerEvent (channel, 121, 0);

modules/juce_audio_basics/midi/juce_MidiMessage.h

@@ -501,6 +501,11 @@ public:
     */
     bool isAllSoundOff() const noexcept;
 
+    /** Checks whether this message is a reset all controllers message.
+        @see allControllerOff
+    */
+    bool isResetAllControllers() const noexcept;
+
     /** Creates an all-notes-off message.
         @param channel              the midi channel, in the range 1 to 16
         @see isAllNotesOff