00001 /* 00002 ** ClanLib SDK 00003 ** Copyright (c) 1997-2011 The ClanLib Team 00004 ** 00005 ** This software is provided 'as-is', without any express or implied 00006 ** warranty. In no event will the authors be held liable for any damages 00007 ** arising from the use of this software. 00008 ** 00009 ** Permission is granted to anyone to use this software for any purpose, 00010 ** including commercial applications, and to alter it and redistribute it 00011 ** freely, subject to the following restrictions: 00012 ** 00013 ** 1. The origin of this software must not be misrepresented; you must not 00014 ** claim that you wrote the original software. If you use this software 00015 ** in a product, an acknowledgment in the product documentation would be 00016 ** appreciated but is not required. 00017 ** 2. Altered source versions must be plainly marked as such, and must not be 00018 ** misrepresented as being the original software. 00019 ** 3. This notice may not be removed or altered from any source distribution. 00020 ** 00021 ** Note: Some of the libraries ClanLib may link to may have additional 00022 ** requirements or restrictions. 00023 ** 00024 ** File Author(s): 00025 ** 00026 ** Magnus Norddahl 00027 ** Mark Page 00028 */ 00029 00032 00033 #pragma once 00034 00035 #include "../api_sound.h" 00036 #include "../soundfilter.h" 00037 00038 class CL_FadeFilterProvider; 00039 00043 class CL_API_SOUND CL_FadeFilter : public CL_SoundFilter 00044 { 00047 00048 public: 00050 CL_FadeFilter(float initial_volume); 00051 00053 virtual ~CL_FadeFilter(); 00054 00058 00059 public: 00061 float get_volume() const; 00062 00066 00067 public: 00068 00070 CL_FadeFilterProvider *get_provider() const; 00071 00073 void set_volume(float new_volume); 00074 00076 void fade_to_volume(float new_volume, int duration = 1000); 00077 00081 00082 private: 00084 }; 00085