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/*
The mediastreamer library aims at providing modular media processing and I/O
for linphone, but also for any telephony application.
Copyright (C) 2001 Simon MORLAT simon.morlat@linphone.org
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1307 USA
*/
#include "msossread.h"
#include "mssync.h"
#include <unistd.h>
#include <errno.h>
#include <sys/time.h>
#include <sys/types.h>
MSFilterInfo oss_read_info={
"OSS read",
0,
MS_FILTER_AUDIO_IO,
ms_oss_read_new,
NULL
};
static MSOssReadClass *msossreadclass=NULL;
MSFilter * ms_oss_read_new()
{
MSOssRead *w;
if (msossreadclass==NULL)
{
msossreadclass=g_new(MSOssReadClass,1);
ms_oss_read_class_init( msossreadclass );
}
w=g_new(MSOssRead,1);
MS_FILTER(w)->klass=MS_FILTER_CLASS(msossreadclass);
ms_oss_read_init(w);
return(MS_FILTER(w));
}
/* FOR INTERNAL USE*/
void ms_oss_read_init(MSOssRead *w)
{
ms_sound_read_init(MS_SOUND_READ(w));
MS_FILTER(w)->outfifos=w->f_outputs;
MS_FILTER(w)->outfifos[0]=NULL;
w->devid=0;
w->sndcard=NULL;
w->freq=8000;
}
gint ms_oss_read_set_property(MSOssRead *f,MSFilterProperty prop, void *value)
{
switch(prop){
case MS_FILTER_PROPERTY_FREQ:
f->freq=((gint*)value)[0];
break;
}
return 0;
}
void ms_oss_read_class_init(MSOssReadClass *klass)
{
ms_sound_read_class_init(MS_SOUND_READ_CLASS(klass));
MS_FILTER_CLASS(klass)->max_foutputs=1; /* one fifo output only */
MS_FILTER_CLASS(klass)->setup=(MSFilterSetupFunc)ms_oss_read_setup;
MS_FILTER_CLASS(klass)->unsetup=(MSFilterSetupFunc)ms_oss_read_stop;
MS_FILTER_CLASS(klass)->process= (MSFilterProcessFunc)ms_oss_read_process;
MS_FILTER_CLASS(klass)->set_property=(MSFilterPropertyFunc)ms_oss_read_set_property;
MS_FILTER_CLASS(klass)->destroy= (MSFilterDestroyFunc)ms_oss_read_destroy;
MS_FILTER_CLASS(klass)->w_maxgran=MS_OSS_READ_MAX_GRAN;
MS_FILTER_CLASS(klass)->info=&oss_read_info;
MS_SOUND_READ_CLASS(klass)->set_device=(gint (*)(MSSoundRead*,gint))ms_oss_read_set_device;
MS_SOUND_READ_CLASS(klass)->start=(void (*)(MSSoundRead*))ms_oss_read_start;
MS_SOUND_READ_CLASS(klass)->stop=(void (*)(MSSoundRead*))ms_oss_read_stop;
ms_filter_class_set_name(MS_FILTER_CLASS(klass),"OssRead");
/* //ms_filter_class_set_attr( MS_FILTER_CLASS(klass),FILTER_CAN_SYNC|FILTER_IS_SOURCE); */
}
void ms_oss_read_destroy( MSOssRead *obj)
{
g_free(obj);
}
void ms_oss_read_process(MSOssRead *f)
{
MSFifo *fifo;
char *p;
fifo=f->f_outputs[0];
g_return_if_fail(f->sndcard!=NULL);
g_return_if_fail(f->gran>0);
if (snd_card_can_read(f->sndcard)){
int got;
ms_fifo_get_write_ptr(fifo,f->gran,(void**)&p);
g_return_if_fail(p!=NULL);
got=snd_card_read(f->sndcard,p,f->gran);
if (got>=0 && got!=f->gran) ms_fifo_update_write_ptr(fifo,got);
}
}
void ms_oss_read_start(MSOssRead *r)
{
g_return_if_fail(r->devid!=-1);
r->sndcard=snd_card_manager_get_card(snd_card_manager,r->devid);
g_return_if_fail(r->sndcard!=NULL);
/* open the device for an audio telephony signal with minimum latency */
snd_card_open_r(r->sndcard,16,0,r->freq);
r->gran=(512*r->freq)/8000;
}
void ms_oss_read_stop(MSOssRead *w)
{
g_return_if_fail(w->devid!=-1);
g_return_if_fail(w->sndcard!=NULL);
snd_card_close_r(w->sndcard);
w->sndcard=NULL;
}
void ms_oss_read_setup(MSOssRead *f, MSSync *sync)
{
f->sync=sync;
ms_oss_read_start(f);
}
gint ms_oss_read_set_device(MSOssRead *r,gint devid)
{
r->devid=devid;
return 0;
}
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