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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: https://scummvm.svn.sourceforge.net/svnroot/scummvm/scummvm/trunk/backends/platform/psp/osys_psp.cpp $
* $Id: osys_psp.cpp 46126 2009-11-24 14:18:46Z fingolfin $
*
*/
#ifndef PSP_AUDIO_H
#define PSP_AUDIO_H
class PspAudio {
public:
enum {
NUM_BUFFERS = 2,
FREQUENCY = 44100 /* only frequency we allow */
};
typedef void (* callbackFunc)(void *userData, byte *samples, int len);
PspAudio() : _pspChannel(0),
_numOfChannels(0), _numOfSamples(0), _callback(0),
_bufferToPlay(0), _bufferToFill(0),
_init(false), _paused(true) {
for (int i=0; i<NUM_BUFFERS; i++)
_buffers[i] = 0;
}
~PspAudio() { close(); }
bool playBuffer();
void nextBuffer(int &bufferIdx);
static int thread(SceSize, void *);
void audioThread();
bool open(uint32 freq, uint32 numOfChannels, uint32 numOfSamples, callbackFunc callback, void *userData);
bool createThread();
void close();
uint32 getFrequency() { return FREQUENCY; }
void pause() { _paused = true; }
void unpause() { _paused = false; }
private:
int _pspChannel; // chosen hardware output channel
uint32 _numOfChannels; // 1 for mono; 2 for stereo
uint32 _numOfSamples;
callbackFunc _callback; // the callback to call between outputting audio
void *_userData; // userData to send with callback
byte *_buffers[NUM_BUFFERS];
int _bufferToPlay; // the next buffer to output
int _bufferToFill;
int _bufferSize;
bool _init; // flag for initialization
bool _paused;
};
#endif /* PSP_AUDIO_H */
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