--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/foosdk/sdk/foobar2000/SDK/replaygain.h	Mon Jan 05 02:15:46 2026 -0500
@@ -0,0 +1,93 @@
+#pragma once
+//! Structure storing ReplayGain configuration: album/track source data modes, gain/peak processing modes and preamp values.
+struct t_replaygain_config
+{
+	enum /*t_source_mode*/ {
+		source_mode_none,
+		source_mode_track,
+		source_mode_album, 
+		// New in 1.3.8
+		// SPECIAL MODE valid only for playback settings; if set, track gain will be used for random & shuffle-tracks modes, album for shuffle albums & ordered playback.
+		source_mode_byPlaybackOrder 
+	};
+	enum /*t_processing_mode*/ {processing_mode_none,processing_mode_gain,processing_mode_gain_and_peak,processing_mode_peak};
+	typedef t_uint32 t_source_mode; typedef t_uint32 t_processing_mode;
+
+	t_replaygain_config() {reset();}
+	t_replaygain_config(t_source_mode p_source_mode,t_processing_mode p_processing_mode,float p_preamp_without_rg, float p_preamp_with_rg)
+		: m_source_mode(p_source_mode), m_processing_mode(p_processing_mode), m_preamp_without_rg(p_preamp_without_rg), m_preamp_with_rg(p_preamp_with_rg) {}
+
+	
+	t_source_mode m_source_mode;
+	t_processing_mode m_processing_mode;
+	float m_preamp_without_rg, m_preamp_with_rg;//preamp values in dB
+
+	void reset();
+	audio_sample query_scale(const file_info & info) const;
+	audio_sample query_scale(const metadb_handle_ptr & info) const;
+	audio_sample query_scale(const replaygain_info & info) const;
+	
+	static void print_preamp(double val, pfc::string_base & out);
+
+	void format_name(pfc::string_base & p_out) const;
+	bool is_active() const;
+
+	static bool equals(const t_replaygain_config & v1, const t_replaygain_config & v2) {
+		return v1.m_source_mode == v2.m_source_mode && v1.m_processing_mode == v2.m_processing_mode && v1.m_preamp_without_rg == v2.m_preamp_without_rg && v1.m_preamp_with_rg == v2.m_preamp_with_rg;
+	}
+	bool operator==(const t_replaygain_config & other) const {return equals(*this, other);}
+	bool operator!=(const t_replaygain_config & other) const {return !equals(*this, other);}
+};
+
+FB2K_STREAM_READER_OVERLOAD(t_replaygain_config) {
+	return stream >> value.m_source_mode >> value.m_processing_mode >> value.m_preamp_with_rg >> value.m_preamp_without_rg;
+}
+FB2K_STREAM_WRITER_OVERLOAD(t_replaygain_config) {
+	return stream << value.m_source_mode << value.m_processing_mode << value.m_preamp_with_rg << value.m_preamp_without_rg;
+}
+
+//! Core service providing methods to retrieve/alter playback ReplayGain settings, as well as use ReplayGain configuration dialog.
+class NOVTABLE replaygain_manager : public service_base {
+public:
+	//! Retrieves playback ReplayGain settings.
+	virtual void get_core_settings(t_replaygain_config & p_out) = 0;
+	t_replaygain_config get_core_settings();
+
+	//! Creates embedded version of ReplayGain settings dialog. Note that embedded dialog sends WM_COMMAND with id/BN_CLICKED to parent window when user makes changes to settings.
+	virtual fb2k::hwnd_t configure_embedded(const t_replaygain_config & p_initdata,fb2k::hwnd_t p_parent,unsigned p_id,bool p_from_modal) = 0;
+	//! Retrieves settings from embedded version of ReplayGain settings dialog.
+	virtual void configure_embedded_retrieve(fb2k::hwnd_t wnd,t_replaygain_config & p_data) = 0;
+	
+	//! Shows popup/modal version of ReplayGain settings dialog. Returns true when user changed the settings, false when user cancelled the operation. Title parameter can be null to use default one.
+	virtual bool configure_popup(t_replaygain_config & p_data,fb2k::hwnd_t p_parent,const char * p_title) = 0;
+
+	//! Alters playback ReplayGain settings.
+	virtual void set_core_settings(const t_replaygain_config & p_config) = 0;
+
+	//! New in 1.0
+	virtual void configure_embedded_set(fb2k::hwnd_t wnd, t_replaygain_config const & p_data) = 0;
+	//! New in 1.0
+	virtual void get_core_defaults(t_replaygain_config & out) = 0;
+
+	//! Helper; queries scale value for specified item according to core playback settings.
+	audio_sample core_settings_query_scale(const file_info & p_info);
+	//! Helper; queries scale value for specified item according to core playback settings.
+	audio_sample core_settings_query_scale(const metadb_handle_ptr & info);
+
+	FB2K_MAKE_SERVICE_COREAPI(replaygain_manager);
+};
+
+//! \since 1.4
+class NOVTABLE replaygain_core_settings_notify {
+public:
+	virtual void on_changed( t_replaygain_config const & cfg ) = 0;
+};
+
+//! \since 1.4
+//! Adds new method for getting notified about core RG settings changing
+class NOVTABLE replaygain_manager_v2 : public replaygain_manager {
+	FB2K_MAKE_SERVICE_COREAPI_EXTENSION( replaygain_manager_v2, replaygain_manager );
+public:
+	virtual void add_notify(replaygain_core_settings_notify *) = 0;
+	virtual void remove_notify(replaygain_core_settings_notify *) = 0;
+};