root/branches/transport_redesign/libs/hydrogen/src/IO/OssDriver.h @ 872

/*
 * Hydrogen
 * Copyright(c) 2002-2008 by Alex >Comix< Cominu [comix@users.sourceforge.net]
 *
 * http://www.hydrogen-music.org
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */


#ifndef H2CORE_OSS_AUDIO_DRIVER_H
#define H2CORE_OSS_AUDIO_DRIVER_H

#include <hydrogen/IO/AudioOutput.h>
#include <hydrogen/IO/NullDriver.h>

// check if OSS support is enabled
#ifdef OSS_SUPPORT


#ifdef __NetBSD__
#include <soundcard.h>
#else
#include <sys/soundcard.h>
#endif
#include <sys/ioctl.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <iostream>
#include <unistd.h>
#include <inttypes.h>

#include <hydrogen/globals.h>

/*
#ifdef __NetBSD__
        #define AUDIO_DEVICE "/dev/audio"
#else
        #define AUDIO_DEVICE "/dev/dsp"
#endif
*/

namespace H2Core
{

typedef int  ( *audioProcessCallback )( uint32_t, void * );

///
/// OSS Audio Driver
///
class OssDriver : public AudioOutput
{
public:
        OssDriver( audioProcessCallback processCallback );
        ~OssDriver();

        int init( unsigned bufferSize );
        int connect();
        void disconnect();

        void write();
        unsigned getBufferSize();
        unsigned getSampleRate();
        float* getOut_L();
        float* getOut_R();

        virtual void play();
        virtual void stop();
        virtual void locate( unsigned long nFrame );
        virtual void updateTransportInfo();
        virtual void setBpm( float fBPM );

private:
        /** file descriptor, for writing to /dev/dsp */
        int fd;

        short* audioBuffer;
        float* out_L;
        float* out_R;

        audioProcessCallback processCallback;
        int log2( int n );

};

#else

namespace H2Core {

class OssDriver : public NullDriver
{
public:
        OssDriver( audioProcessCallback processCallback ) : NullDriver( processCallback ) {}

};



#endif // OSS_SUPPORT

};

#endif // H2CORE_OSS_AUDIO_DRIVER_H