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111 lines
2.5 KiB
C++
111 lines
2.5 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef TITANIC_AUDIO_BUFFER_H
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#define TITANIC_AUDIO_BUFFER_H
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#include "titanic/support/fixed_queue.h"
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#include "common/mutex.h"
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namespace Titanic {
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#define AUDIO_SAMPLING_RATE 22050
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class CAudioBuffer {
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private:
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Common::Mutex _mutex;
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FixedQueue<int16, AUDIO_SAMPLING_RATE * 4> _data;
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private:
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/**
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* Enters a critical section
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*/
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void enterCriticalSection();
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/**
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* Leave a critical section
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*/
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void leaveCriticalSection();
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private:
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bool _finished;
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public:
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CAudioBuffer(int maxSize);
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/**
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* Resets the audio buffer
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*/
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void reset();
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/**
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* Returns true if the buffer is empty
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*/
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bool empty() const { return _data.empty(); }
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/**
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* Returns the number of 16-bit entries in the buffer
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*/
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int size() const { return _data.size(); }
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/**
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* Returns the number of entries free in the buffer
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*/
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int freeSize() const { return _data.freeSize(); }
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/**
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* Returns true if the buffer is full
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*/
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bool full() const { return _data.full(); }
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/**
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* Returns true if the audio buffering is finished
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*/
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bool isFinished() const { return _finished && empty(); }
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/**
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* Adds a value to the buffer
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*/
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void push(int16 value);
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/**
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* Adds a value to the buffer
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*/
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void push(const int16 *values, int count);
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/**
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* Removes a value from the buffer
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*/
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int16 pop();
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/**
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* Reads out a specified number of samples
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*/
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int read(int16 *values, int count);
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/**
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* Marks the buffer as finishing, and that no more new data will arrive
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*/
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void finalize() { _finished = true; }
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};
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} // End of namespace Titanic
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#endif /* TITANIC_AUDIO_BUFFER_H */
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