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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
* BS_SoundEngine
* -------------
* This is the sound engine interface that contains all the methods a sound
* engine must implement.
* Implementations of the sound engine have to be derived from this class.
* It should be noted that a sound engine must maintain a list of all the
* samples it uses, and that these samples should be released when the
* destructor is called.
*
* Autor: Malte Thiesen
*/
#ifndef SWORD25_SOUNDENGINE_H
#define SWORD25_SOUNDENGINE_H
// -----------------------------------------------------------------------------
// Includes
// -----------------------------------------------------------------------------
#include "sword25/kernel/common.h"
#include "sword25/kernel/resservice.h"
#include "sword25/kernel/persistable.h"
namespace Sword25 {
// -----------------------------------------------------------------------------
// Class definitions
// -----------------------------------------------------------------------------
class BS_SoundEngine : public BS_ResourceService, public BS_Persistable {
public:
// -----------------------------------------------------------------------------
// Enums and Types
// -----------------------------------------------------------------------------
enum SOUND_TYPES {
MUSIC = 0,
SPEECH = 1,
SFX = 2
};
/**
* The callback function of PlayDynamicSoundEx
* @param UserData User-specified pointer
* @param Data Pointer to the data buffer
* @param DataLength Length of the data to be written in bytes
*/
typedef void (*DynamicSoundReadCallback)(void *UserData, void *Data, unsigned int DataLength);
// -----------------------------------------------------------------------------
// Constructor / destructor
// -----------------------------------------------------------------------------
BS_SoundEngine(BS_Kernel* pKernel);
virtual ~BS_SoundEngine() {};
// --------------------------------------------------------------
// THIS METHOD MUST BE IMPLEMENTED BY THE SOUND ENGINE
// --------------------------------------------------------------
/**
* Initialises the sound engine
* @param SampleRate Specifies the sample rate to use.
* @param Channels The maximum number of channels. The default is 32.
* @return Returns true on success, otherwise false.
* @remark Calls to other methods may take place only if this
* method was called successfully.
*/
virtual bool Init(unsigned int SampleRate, unsigned int Channels = 32) = 0;
/**
* Performs a "tick" of the sound engine
*
* This method should be called once per frame. It can be used by implementations
* of the sound engine that are not running in their own thread, or to perform
* additional administrative tasks that are needed.
*/
virtual void Update() = 0;
/**
* Sets the default volume for the different sound types
* @param Volume The default volume level (0 = off, 1 = full volume)
* @param Type The SoundType whose volume is to be changed
*/
virtual void SetVolume(float Volume, SOUND_TYPES Type) = 0;
/**
* Specifies the default volume of different sound types
* @param Type The SoundType
* @return Returns the standard sound volume for the given type
* (0 = off, 1 = full volume).
*/
virtual float GetVolume(SOUND_TYPES Type) = 0;
/**
* Pauses all the sounds that are playing.
*/
virtual void PauseAll() = 0;
/**
* Resumes all currently stopped sounds
*/
virtual void ResumeAll() = 0;
/**
* Pauses all sounds of a given layer.
* @param Layer The Sound Layer
*/
virtual void PauseLayer(unsigned int Layer) = 0;
/**
* Resumes all the sounds in a layer that was previously stopped with PauseLayer()
* @param Layer The Sound Layer
*/
virtual void ResumeLayer(unsigned int Layer) = 0;
/**
* Plays a sound
* @param FileName The filename of the sound to be played
* @param Type The type of sound
* @param Volume The volume of the sound (0 = off, 1 = full volume)
* @param Pan Panning (-1 = full left, 1 = right)
* @param Loop Indicates whether the sound should be looped
* @param LoopStart Indicates the starting loop point. If a value less than 0 is passed, the start
* of the sound is used.
* @param LoopEnd Indicates the ending loop point. If a avlue is passed less than 0, the end of
* the sound is used.
* @param Layer The sound layer
* @return Returns true if the playback of the sound was started successfully.
* @remark If more control is needed over the playing, eg. changing the sound parameters
* for Volume and Panning, then PlaySoundEx should be used.
*/
virtual bool PlaySound(const std::string& FileName, SOUND_TYPES Type, float Volume = 1.0f, float Pan = 0.0f, bool Loop = false, int LoopStart = -1, int LoopEnd = -1, unsigned int Layer = 0) = 0;
/**
* Plays a sound
* @param Type The type of sound
* @param Volume The volume of the sound (0 = off, 1 = full volume)
* @param Pan Panning (-1 = full left, 1 = right)
* @param Loop Indicates whether the sound should be looped
* @param LoopStart Indicates the starting loop point. If a value less than 0 is passed, the start
* of the sound is used.
* @param LoopEnd Indicates the ending loop point. If a avlue is passed less than 0, the end of
* the sound is used.
* @param Layer The sound layer
* @return Returns a handle to the sound. With this handle, the sound can be manipulated during playback.
* @remark If more control is needed over the playing, eg. changing the sound parameters
* for Volume and Panning, then PlaySoundEx should be used.
*/
virtual unsigned int PlaySoundEx(const std::string& FileName, SOUND_TYPES Type, float Volume = 1.0f, float Pan = 0.0f, bool Loop = false, int LoopStart = -1, int LoopEnd = -1, unsigned int Layer = 0) = 0;
/**
* Plays a sound generated at runtime
* @param ReadCallback A pointer to a callback function that is called when sound data is needed.
* See the documentation for DynamicSoundReadCallback for more information.
* @param UserData A pointer to the data. These are passed to the callback function each time.
* If no such data is needed, this parameter can be set to NULL.
* @param Type The type of sound
* @param SampleRate The sample rate for the sound
* @param BitsPerSample The size of the sample in bits. This statement is independant of the number of
* channels. Allowed values are 8, 16, 24, and 32.
* @param Channels The number of channels. Allowed values are 1 and 2.
* @param Volume The volume of the sound (0 = off, 1 = full volume)
* @param Pan Panning (-1 = full left, 1 = right)
* @param Layer The sound layer
* @return Returns a handle to the sound. With this handle, the sound can be manipulated during playback.
* @remark Dynamic sounds cannot be persisted.
*/
virtual unsigned int PlayDynamicSoundEx(DynamicSoundReadCallback ReadCallback, void *UserData, SOUND_TYPES Type, unsigned int SampleRate, unsigned int BitsPerSample, unsigned int Channels, float Volume = 1.0f, float Pan = 0.0f, unsigned int Layer = 0) = 0;
/**
* Sets the volume of a playing sound
* @param Handle The sound handle
* @param Volume The volume of the sound (0 = off, 1 = full volume)
*/
virtual void SetSoundVolume(unsigned int Handle, float Volume) = 0;
/**
* Sets the panning of a playing sound
* @param Handle The sound handle
* @param Pan Panning (-1 = full left, 1 = right)
*/
virtual void SetSoundPanning(unsigned int Handle, float Pan) = 0;
/**
* Pauses a playing sound
* @param Handle The sound handle
*/
virtual void PauseSound(unsigned int Handle) = 0;
/**
* Resumes a paused sound
* @param Handle The sound handle
*/
virtual void ResumeSound(unsigned int Handle) = 0;
/**
* Stops a playing sound
* @param Handle The sound handle
* @remark Calling this method invalidates the passed handle; it can no longer be used.
*/
virtual void StopSound(unsigned int Handle) = 0;
/**
* Returns whether a sound is paused
* @param Handle The sound handle
* @return Returns true if the sound is paused, false otherwise.
*/
virtual bool IsSoundPaused(unsigned int Handle) = 0;
/**
* Returns whether a sound is still playing.
* @param Handle The sound handle
* @return Returns true if the sound is playing, false otherwise.
*/
virtual bool IsSoundPlaying(unsigned int Handle) = 0;
/**
* Returns the volume of a playing sound (0 = off, 1 = full volume)
*/
virtual float GetSoundVolume(unsigned int Handle) = 0;
/**
* Returns the panning of a playing sound (-1 = full left, 1 = right)
*/
virtual float GetSoundPanning(unsigned int Handle) = 0;
/**
* Returns the position within a playing sound in seconds
*/
virtual float GetSoundTime(unsigned int Handle) = 0;
private:
bool _RegisterScriptBindings();
};
} // End of namespace Sword25
#endif
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