| | Open Sound System |
| Do you have problems with sound/audio application development? Don't panic! Click here for help! |
This file is part of Open Sound System.
Copyright (C) 4Front Technologies 1996-2008.
This this source file is released under GPL v2 license (no other versions). See the COPYING file included in the main directory of this source distribution for the license terms and conditions.
static int
sadasupport_open (queue_t * q, dev_t * devp, int flag, int sflag,
cred_t * credp)
{
int retval, i;
int tmpdev;
int dev = *devp;
char *cmd;
unsigned int bl_flags = 0;
int oss_mode = 0;
#ifndef SOL9
extern void oss_forceload_drivers (int dev, cred_t * cred_p);
#endif
DDB (cmn_err
(CE_CONT, "sadasupport_open(q=%x, dev=%x, flag=%x, sflag=%x)\n", q,
dev, flag, sflag));
cmd = oss_get_procname ();
DDB (cmn_err (CE_CONT, "Command %s\n", cmd));
if (devc == NULL)
return EIO;
oss_mode = OPEN_READWRITE;
mutex_enter (&devc->inst_lock);
if (devc->audio_busy++ == 0)
{
mutex_exit (&devc->inst_lock);
tmp_file.acc_flags = 0;
tmp_file.mode = oss_mode;
tmpdev = 0;
devc->audio_mode = tmp_file.mode;
#if 0
DDB (cmn_err (CE_CONT, "Opening OSS audio device file %d (mode=%x)\n",
devc->masterdev, tmp_file.mode));
if (devc->masterdev >= 0 && devc->masterdev < num_audio_devfiles)
#endif
{
/* Open /dev/dsp# */
tmp_file.mode = oss_mode = OPEN_READ | OPEN_WRITE;
if ((retval =
oss_audio_open_devfile (0, OSS_DEV_DSP,
&tmp_file, 1, OF_DEVAUDIO,
&tmpdev)) < 0)
{
mutex_enter (&devc->inst_lock);
devc->audio_busy = 0;
mutex_exit (&devc->inst_lock);
return -retval;
}
}
#if 0
else
{
/* Open /dev/dsp */
if ((retval =
oss_open_vdsp (0, OSS_DEV_VDSP, &tmp_file, 1, OF_DEVAUDIO,
&tmpdev)) < 0)
{
mutex_enter (&devc->inst_lock);
devc->audio_busy = 0;
mutex_exit (&devc->inst_lock);
return -retval;
}
}
#endif
DDB (cmn_err
(CE_CONT, "Opened OSS audio engine %d, minor=%d\n", retval,
tmpdev));
devc->oss_audiodev = retval;
if (tmp_file.mode & OPEN_READ)
audio_engines[retval]->dmap_in->audio_callback = input_callback;
if (tmp_file.mode & OPEN_WRITE)
audio_engines[retval]->dmap_out->audio_callback = output_callback;
strcpy (audio_engines[retval]->cmd, "SADA");
strcpy (audio_engines[retval]->label, "SADA");
audio_engines[retval]->pid = 0;
if ((retval = setup_device (devc)) != AUDIO_SUCCESS)
{
cmn_err (CE_NOTE, "setup_device failed\n");
mutex_enter (&devc->inst_lock);
if (--devc->audio_busy == 0)
{
mutex_exit (&devc->inst_lock);
oss_audio_release (devc->oss_audiodev, &tmp_file);
}
else
mutex_exit (&devc->inst_lock);
return EIO;
}
}
else
{
if (oss_mode & ~devc->audio_mode)
{
cmn_err (CE_NOTE, "Conflicting access modes\n");
if (--devc->audio_busy == 0)
{
mutex_exit (&devc->inst_lock);
oss_audio_release (devc->oss_audiodev, &tmp_file);
return EBUSY;
}
mutex_exit (&devc->inst_lock);
return EBUSY;
}
mutex_exit (&devc->inst_lock);
}
DDB (cmn_err (CE_CONT, "Open count %d\n", devc->audio_busy));
DDB (cmn_err
(CE_CONT, "audio_sup_open(q=%x, dev=%x, flag=%x, sflag=%x)\n", q, dev,
flag, sflag));
if ((retval = audio_sup_open (q, devp, flag, sflag, credp)) != 0)
{
cmn_err (CE_NOTE, "audio_sup_open() returned %d\n", retval);
mutex_enter (&devc->inst_lock);
if (--devc->audio_busy == 0)
{
mutex_exit (&devc->inst_lock);
oss_audio_release (devc->oss_audiodev, &tmp_file);
}
else
mutex_exit (&devc->inst_lock);
}
return retval;
}
static int
sadasupport_close (queue_t * q, int flag, cred_t * credp)
{
int retval, count;
DDB (cmn_err (CE_CONT, "sadasupport_close(q=%x, flag=%x)\n", q, flag));
if (!devc->audio_busy)
cmn_err (CE_WARN, "Close while not busy.\n");
retval = audio_sup_close (q, flag, credp);
mutex_enter (&devc->inst_lock);
count = --devc->audio_busy;
mutex_exit (&devc->inst_lock);
DDB (cmn_err (CE_CONT, "Open count (close) %d\n", count));
if (count == 0)
{
DDB (cmn_err
(CE_CONT, "Closing OSS audiodev %d\n", devc->oss_audiodev));
oss_audio_release (devc->oss_audiodev, &tmp_file);
devc->audio_mode = 0;
}
return retval;
}