AudioA.hh

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/*

    ALSA audio I/O
    Copyright (C) 2000-2001 Jussi Laako

    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

*/


#ifdef USE_ALSA05


#include <sys/asoundlib.h>


#ifndef AUDIOA_HH
    #define AUDIOA_HH

    #define AA_MODE_PLAY            SND_PCM_OPEN_PLAYBACK
    #define AA_MODE_RECORD          SND_PCM_OPEN_CAPTURE
    #define AA_MODE_DUPLEX          SND_PCM_OPEN_DUPLEX

    #define AA_FRAG_RECORD_LW       1
    #define AA_FRAG_PLAY_LW         3
    #define AA_FRAG_PLAY_HW         1


    class clAudioA
    {
            bool bStream;
            int iCard;
            int iDevice;
            int iSubDevice;
            int iMode;
            snd_ctl_t *spSndCtlH;
            snd_pcm_t *spPcmH;
            snd_ctl_hw_info_t sHWInfo;
            snd_pcm_info_t sPCMInfo;
            snd_pcm_channel_info_t sPCMChInfo;
            snd_pcm_channel_setup_t sPCMSetup;
        public:
            clAudioA ();
            ~clAudioA ();
            /* - Card specifics - */
            bool CardOpen (int);
            void CardClose ();
            int CardGetCount ();
            const char *CardGetName ();
            const char *CardGetLongName ();
            int CardGetChannelCount ();
            /* - Device specifics - */
            bool PcmOpen (int, int, int);
            void PcmClose ();
            bool PcmSetSetup (int, int, int, int, bool);
            int PcmGetChannels ();
            int PcmGetSampleRate ();
            int PcmGetBits ();
            int PcmGetFragmentSize ();
            const char *PcmGetFormatName ();
            int PcmGetStatus ();
            const char *PcmGetStatusStr (int);
            const char *PcmGetName ();
            const snd_pcm_channel_info_t *PcmGetChannelInfo ();
            bool PcmGetChannelStatus (snd_pcm_channel_status_t *);
            int PcmGetBufUsed ();
            int PcmGetBufFree ();
            bool PcmPrepare ();
            bool PcmGo ();
            bool PcmDrain ();
            bool PcmFlush ();
            ssize_t PcmGetTransferSize ();
            ssize_t PcmRead (void *, size_t);
            ssize_t PcmWrite (const void *, size_t);
    };

#endif

#endif  // USE_ALSA05

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