1 files changed, 71 insertions, 0 deletions
diff --git a/xbmc/application/ApplicationVolumeHandling.h b/xbmc/application/ApplicationVolumeHandling.h
new file mode 100644
index 0000000..d417227
--- /dev/null
+++ b/xbmc/application/ApplicationVolumeHandling.h
@@ -0,0 +1,71 @@
+/*
+ *  Copyright (C) 2005-2018 Team Kodi
+ *  This file is part of Kodi - https://kodi.tv
+ *
+ *  SPDX-License-Identifier: GPL-2.0-or-later
+ *  See LICENSES/README.md for more information.
+ */
+
+#pragma once
+
+#include "application/IApplicationComponent.h"
+
+class CAction;
+class CApplication;
+class CSetting;
+class CSettings;
+class TiXmlNode;
+
+/*!
+ * \brief Class handling application support for audio volume management.
+ */
+class CApplicationVolumeHandling : public IApplicationComponent
+{
+  friend class CApplication;
+
+public:
+  // replay gain settings struct for quick access by the player multiple
+  // times per second (saves doing settings lookup)
+  struct ReplayGainSettings
+  {
+    int iPreAmp;
+    int iNoGainPreAmp;
+    int iType;
+    bool bAvoidClipping;
+  };
+
+  float GetVolumePercent() const;
+  float GetVolumeRatio() const;
+  bool IsMuted() const;
+
+  void SetVolume(float iValue, bool isPercentage = true);
+  void SetMute(bool mute);
+  void ToggleMute(void);
+
+  const ReplayGainSettings& GetReplayGainSettings() const { return m_replayGainSettings; }
+
+  static constexpr float VOLUME_MINIMUM = 0.0f; // -60dB
+  static constexpr float VOLUME_MAXIMUM = 1.0f; // 0dB
+  static constexpr float VOLUME_DYNAMIC_RANGE = 90.0f; // 60dB
+
+  bool Load(const TiXmlNode* settings);
+  bool Save(TiXmlNode* settings) const;
+  bool OnSettingChanged(const CSetting& setting);
+
+protected:
+  bool IsMutedInternal() const { return m_muted; }
+  void ShowVolumeBar(const CAction* action = nullptr);
+
+  void CacheReplayGainSettings(const CSettings& settings);
+
+  void Mute();
+  void UnMute();
+
+  void SetHardwareVolume(float hardwareVolume);
+
+  void VolumeChanged();
+
+  bool m_muted = false;
+  float m_volumeLevel = VOLUME_MAXIMUM;
+  ReplayGainSettings m_replayGainSettings;
+};