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// ----------------------------------------------------------------------------
//
// Copyright (C) 2003-2012 Fons Adriaensen <fons@linuxaudio.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., 675 Mass Ave, Cambridge, MA 02139, USA.
//
// ----------------------------------------------------------------------------
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <zita-alsa-pcmi.h>
#include "pxthread.h"
// --------------------------------------------------------------------------------
static char playdev [256];
static char captdev [256];
static int fsamp;
static int frsize;
static int nfrags;
class Audiothr : public Pxthread
{
private:
virtual void thr_main (void);
};
void Audiothr::thr_main (void)
{
Alsa_pcmi *D;
float *buf;
int i, k;
buf = new float [frsize * 2];
D = new Alsa_pcmi (playdev, captdev, 0, fsamp, frsize, nfrags, 0);
if (D->state ())
{
fprintf (stderr, "Can't open ALSA device\n");
delete D;
exit (1);
}
if ((D->ncapt () < 2) || (D->nplay () < 2))
{
fprintf (stderr, "Expected a stereo device.\n");
delete D;
exit (1);
}
D->printinfo ();
D->pcm_start ();
while (1)
{
k = D->pcm_wait ();
while (k >= frsize)
{
D->capt_init (frsize);
D->capt_chan (0, buf + 0, frsize, 2);
D->capt_chan (1, buf + 1, frsize, 2);
D->capt_done (frsize);
D->play_init (frsize);
D->play_chan (0, buf + 0, frsize, 2);
D->play_chan (1, buf + 1, frsize, 2);
for (i = 2; i < D->nplay (); i++) D->clear_chan (i, frsize);
D->play_done (frsize);
k -= frsize;
}
}
D->pcm_stop ();
delete D;
delete[] buf;
}
// --------------------------------------------------------------------------------
int main (int ac, char *av [])
{
Audiothr A;
if (ac < 6)
{
fprintf (stderr, "%s <playdev> <captdev> <fsamp> <frsize> <nfrags>\n", av[0]);
return 1;
}
strcpy (playdev, av [1]);
strcpy (captdev, av [2]);
fsamp = atoi (av [3]);
frsize = atoi (av [4]);
nfrags = atoi (av [5]);
if (A.thr_start (SCHED_FIFO, -50, 0x20000))
{
fprintf (stderr, "Can't run in RT mode, trying normal scheduling.\n");
if (A.thr_start (SCHED_OTHER, 0, 0x20000))
{
fprintf (stderr, "Can't start audio thread.\n");
return 1;
}
}
sleep (1000000);
return 0;
}
// --------------------------------------------------------------------------------
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