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- Committer: Bazaar Package Importer
- Author(s): Alessio Treglia
- Date: 2010-04-17 12:25:13 UTC
- mfrom: (1.1.4 upstream) (2.1.4 experimental)
- Revision ID: james.westby@ubuntu.com-20100417122513-vsy32s4vwo8vgzvs
Tags: 2.0.0-2
Upload to unstable.
added
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libs/clalsadrv.h
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/*
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Copyright (C) 2003-2008 Fons Adriaensen <fons@kokkinizita.net>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __CLALSADRV_H
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#define __CLALSADRV_H
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#define ALSA_PCM_NEW_HW_PARAMS_API
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#define ALSA_PCM_NEW_SW_PARAMS_API
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#include <alsa/asoundlib.h>
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class Alsa_driver
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{
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public:
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Alsa_driver (const char *play_name,
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const char *capt_name,
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const char *ctrl_name,
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unsigned int rate,
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snd_pcm_uframes_t frsize,
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unsigned int nfrags);
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Alsa_driver (const char *name,
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unsigned int rate,
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snd_pcm_uframes_t frsize,
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unsigned int nfrags,
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bool play,
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bool capt,
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bool ctrl);
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~Alsa_driver (void);
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void printinfo (void);
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int pcm_start (void);
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int pcm_stop (void);
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snd_pcm_sframes_t pcm_wait (void);
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int pcm_idle (snd_pcm_uframes_t len);
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int play_init (snd_pcm_uframes_t len);
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void play_chan (int chan, const float *src, snd_pcm_uframes_t len)
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{
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_play_ptr [chan] = _play_func (src, _play_ptr [chan], _play_step, len);
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}
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void clear_chan (int chan, snd_pcm_uframes_t len)
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{
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_play_ptr [chan] = _clear_func (_play_ptr [chan], _play_step, len);
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}
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int play_done (snd_pcm_uframes_t len)
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{
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return snd_pcm_mmap_commit (_play_handle, _play_offs, len);
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}
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int capt_init (snd_pcm_uframes_t len);
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void capt_chan (int chan, float *dst, snd_pcm_uframes_t len)
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{
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_capt_ptr [chan] = _capt_func (_capt_ptr [chan], dst, _capt_step, len);
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}
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int capt_done (snd_pcm_uframes_t len)
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{
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return snd_pcm_mmap_commit (_capt_handle, _capt_offs, len);
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}
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int stat (void) { return _stat; }
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int nplay (void) { return _play_nchan; }
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int ncapt (void) { return _capt_nchan; }
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snd_pcm_t *play_handle (void) { return _play_handle; }
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snd_pcm_t *capt_handle (void) { return _capt_handle; }
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private:
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typedef char *(*clear_function)(char *, int, int);
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typedef char *(*play_function)(const float *, char *, int, int);
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typedef const char *(*capt_function) (const char *, float *, int, int);
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enum { MAXPFD = 16, MAXPLAY = 64, MAXCAPT = 64 };
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void initialise (const char *play_name,
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const char *capt_name,
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const char *ctrl_name,
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unsigned int rate,
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snd_pcm_uframes_t frsize,
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unsigned int nfrags);
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int set_hwpar (snd_pcm_t *handle, snd_pcm_hw_params_t *hwpar, const char *sname, unsigned int *nchan);
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int set_swpar (snd_pcm_t *handle, snd_pcm_sw_params_t *swpar, const char *sname);
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int recover (void);
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unsigned int _rate;
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snd_pcm_uframes_t _frsize;
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unsigned int _nfrags;
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snd_pcm_t *_play_handle;
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snd_pcm_t *_capt_handle;
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snd_ctl_t *_ctrl_handle;
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snd_pcm_hw_params_t *_play_hwpar;
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snd_pcm_sw_params_t *_play_swpar;
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snd_pcm_hw_params_t *_capt_hwpar;
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snd_pcm_sw_params_t *_capt_swpar;
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snd_pcm_format_t _play_format;
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snd_pcm_format_t _capt_format;
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snd_pcm_access_t _play_access;
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snd_pcm_access_t _capt_access;
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unsigned int _play_nchan;
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unsigned int _capt_nchan;
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int _play_npfd;
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int _capt_npfd;
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bool _synced;
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struct pollfd _pfd [MAXPFD];
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snd_pcm_uframes_t _capt_offs;
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snd_pcm_uframes_t _play_offs;
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int _play_step;
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int _capt_step;
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char *_play_ptr [MAXPLAY];
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const char *_capt_ptr [MAXCAPT];
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int _stat;
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int _pcnt;
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bool _xrun;
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clear_function _clear_func;
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play_function _play_func;
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capt_function _capt_func;
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static char *clear_32le (char *dst, int step, int nfrm);
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static char *clear_24le (char *dst, int step, int nfrm);
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static char *clear_16le (char *dst, int step, int nfrm);
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static char *play_32le (const float *src, char *dst, int step, int nfrm);
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static char *play_24le (const float *src, char *dst, int step, int nfrm);
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static char *play_16le (const float *src, char *dst, int step, int nfrm);
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static const char *capt_32le (const char *src, float *dst, int step, int nfrm);
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static const char *capt_24le (const char *src, float *dst, int step, int nfrm);
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static const char *capt_16le (const char *src, float *dst, int step, int nfrm);
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};
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#endif
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