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/*
*
* Copyright (C) 2009 Christian Gmeiner
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* 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 Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifndef _AUDIO_H_
#define _AUDIO_H_
#include <string.h>
#include <vdr/tools.h> // for uchar
struct SampleContext {
unsigned int channels;
unsigned int samplerate;
};
class iAudio {
public:
enum AudioMode {
Analog,
DigitalPcm,
Ac3,
};
iAudio() : open(false), vol(0), audioChannel(0) { memset(&curContext, 0, sizeof(SampleContext)); }
virtual ~iAudio() {}
virtual void openDevice() = 0;
virtual void releaseDevice() = 0;
virtual void setup(const SampleContext& ctx) = 0;
virtual void write(uchar* data, size_t size) = 0;
void setVolume(int v) { vol = v; }
void mute() { setVolume(0); }
void changeVolume(short* pcmbuf, size_t size);
void setAudioChannel(int channel) { audioChannel = channel; }
int getAudioChannel() { return audioChannel; }
virtual void setAudioMode(AudioMode m) = 0;
AudioMode getAudioMode() { return mode; }
bool isAudioModeAC3() { return mode == Ac3; }
protected:
bool open;
int vol;
int audioChannel;
SampleContext curContext;
AudioMode mode;
};
#endif /*_AUDIO_H_*/
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