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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.
*
*/
#ifndef TITANIC_AUDIO_BUFFER_H
#define TITANIC_AUDIO_BUFFER_H
#include "titanic/support/fixed_queue.h"
#include "common/mutex.h"
namespace Titanic {
#define AUDIO_SAMPLING_RATE 22050
class CAudioBuffer {
private:
Common::Mutex _mutex;
FixedQueue<int16, AUDIO_SAMPLING_RATE * 4> _data;
private:
/**
* Enters a critical section
*/
void enterCriticalSection();
/**
* Leave a critical section
*/
void leaveCriticalSection();
private:
bool _finished;
public:
CAudioBuffer(int maxSize);
/**
* Resets the audio buffer
*/
void reset();
/**
* Returns true if the buffer is empty
*/
bool empty() const { return _data.empty(); }
/**
* Returns the number of 16-bit entries in the buffer
*/
int size() const { return _data.size(); }
/**
* Returns the number of entries free in the buffer
*/
int freeSize() const { return _data.freeSize(); }
/**
* Returns true if the buffer is full
*/
bool full() const { return _data.full(); }
/**
* Returns true if the audio buffering is finished
*/
bool isFinished() const { return _finished && empty(); }
/**
* Adds a value to the buffer
*/
void push(int16 value);
/**
* Adds a value to the buffer
*/
void push(const int16 *values, int count);
/**
* Removes a value from the buffer
*/
int16 pop();
/**
* Reads out a specified number of samples
*/
int read(int16 *values, int count);
/**
* Marks the buffer as finishing, and that no more new data will arrive
*/
void finalize() { _finished = true; }
};
} // End of namespace Titanic
#endif /* TITANIC_AUDIO_BUFFER_H */
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