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/*
** ClanLib SDK
** Copyright (c) 1997-2005 The ClanLib Team
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any damages
** arising from the use of this software.
**
** Permission is granted to anyone to use this software for any purpose,
** including commercial applications, and to alter it and redistribute it
** freely, subject to the following restrictions:
**
** 1. The origin of this software must not be misrepresented; you must not
** claim that you wrote the original software. If you use this software
** in a product, an acknowledgment in the product documentation would be
** appreciated but is not required.
** 2. Altered source versions must be plainly marked as such, and must not be
** misrepresented as being the original software.
** 3. This notice may not be removed or altered from any source distribution.
**
** Note: Some of the libraries ClanLib may link to may have additional
** requirements or restrictions.
**
** File Author(s):
**
** Magnus Norddahl
** (if your name is missing here, please add it)
*/
#ifndef header_soundoutput_generic
#define header_soundoutput_generic
#if _MSC_VER > 1000
#pragma once
#endif
#include <vector>
#include <string>
#include <list>
#include "API/Core/System/thread.h"
#include "API/Core/System/mutex.h"
#include "API/Core/System/event_trigger.h"
#include "API/Core/System/mutexsharedptr.h"
class CL_SoundFilter;
class CL_SoundBuffer_Session_Generic;
class CL_SoundOutput_Generic
{
//! Construction:
public:
CL_SoundOutput_Generic(int mixing_frequency);
virtual ~CL_SoundOutput_Generic();
//! Attributes:
public:
std::string name;
int mixing_frequency;
float volume;
float pan;
std::vector<CL_SoundFilter *> filters;
std::vector<bool> delete_filters;
CL_Thread thread;
CL_EventTrigger stop_mixer;
std::list< CL_MutexSharedPtr<CL_SoundBuffer_Session_Generic> > sessions;
CL_Mutex mutex;
int mix_buffer_size;
int *mix_buffers[2];
int *temp_buffers[2];
short *stereo_buffer;
bool has_sound;
//! Operations:
public:
void add_ref();
void release_ref();
void play_session(CL_MutexSharedPtr<CL_SoundBuffer_Session_Generic> session);
void stop_session(CL_MutexSharedPtr<CL_SoundBuffer_Session_Generic> session);
protected:
//: Called when we have no samples to play - and wants to tell the soundcard
//: about this possible event.
virtual void silence() = 0;
//: Returns the buffer size used by device (returned as num [stereo] samples).
virtual int get_fragment_size() = 0;
//: Writes a fragment to the soundcard.
virtual void write_fragment(short *data) = 0;
//: Waits until output source isn't full anymore.
virtual void wait() = 0;
//: Starts a thread and call mix_fragment() and wait() continueously.
void start_mixer_thread();
//: Stops the mixer thread.
void stop_mixer_thread();
//: Mixes a single fragment and stores the result in stereo_buffer.
void mix_fragment();
//! Implementation:
private:
//: Worker thread for output device. Mixes the audio and sends it to write_fragment.
void mixer_thread();
int ref_count;
};
#endif
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