pc_speaker.h

/* 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef NUVIE_SOUND_MIXER_DECODER_PC_SPEAKER_H
#define NUVIE_SOUND_MIXER_DECODER_PC_SPEAKER_H

#include "ultima/nuvie/files/nuvie_io_file.h"

namespace Ultima {
namespace Nuvie {

#define SPKR_OUTPUT_RATE 22050 //11025 //FIXME may need to fiddle with this.

class PCSpeaker {
private:
    uint32 rate;
    uint16 frequency;
    float half_period;
    float cur_vol;
    float want_vol;
    float time_left;

    uint32 osc_length;
    uint32 osc_samples;

private:

    NuvieIOFileWrite dataFile;
    uint32 wav_length;

public:
    PCSpeaker(uint32 mixer_rate);
    ~PCSpeaker() { }
    void SetOn();
    void SetOff();
    void SetFrequency(uint16 freq, float offset = 0.0f);

    void PCSPEAKER_CallBack(sint16 *stream, const uint32 len);
};

} // End of namespace Nuvie
} // End of namespace Ultima

#endif