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/* aRts sound server support for EsounD
* 22.05.2002 Igor Mokrushin (igor@avtomir.ru):
*
* Prepared according to advices and suggestions by Vlad Harchev <hvv@hippo.ru>
*
* 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
*
*/
#include <dlfcn.h>
enum arts_parameter_t_enum { ARTS_P_BUFFER_TIME = 2 };
typedef void *arts_stream_t;
typedef enum arts_parameter_t_enum arts_parameter_t;
static void *handle;
static int (*arts_init)(void);
static void (*arts_free)(void);
static int (*arts_read)(arts_stream_t sst, void *bbuffer, int ccount);
static int (*arts_write)(arts_stream_t sst, const void *bbuffer, int ccount);
static void (*arts_close_stream)(arts_stream_t sst);
static int (*arts_stream_set)(arts_stream_t sst, arts_parameter_t pparam, int vvalue);
static arts_stream_t (*arts_play_stream)(int rrate, int bbits, int cch, const char *nn);
static arts_stream_t (*arts_record_stream)(int rrate, int bbits, int cch, const char *nn);
static arts_stream_t stream;
static int err_arts = -1;
static int arts_exit = 1;
static int arts()
{
handle = dlopen ("libartsc.so", RTLD_LAZY);
if (!handle) {
arts_exit = 0;
err_arts = -1;
return err_arts;
}
arts_init = dlsym(handle, "arts_init");
arts_free = dlsym(handle, "arts_free");
arts_read = dlsym(handle, "arts_read");
arts_write = dlsym(handle, "arts_write");
arts_play_stream = dlsym(handle, "arts_play_stream");
arts_record_stream = dlsym(handle, "arts_record_stream");
arts_close_stream = dlsym(handle, "arts_close_stream");
arts_stream_set = dlsym(handle, "arts_stream_set");
err_arts = arts_init();
if (err_arts < 0) {
arts_exit = 0;
dlclose(handle);
return err_arts;
}
return err_arts;
}
const char *arts_esd_audio_devices()
{
return "sound server aRts";
}
int arts_esd_audio_open()
{
int channels;
int bits;
channels = ( ( ( esd_audio_format & ESD_MASK_CHAN) == ESD_STEREO )
? /* stereo */ 2 : /* mono */ 1 );
bits = ( (esd_audio_format & ESD_MASK_BITS) == ESD_BITS16 )
? /* 16 bit */ 16 : /* 8 bit */ 8;
if ((esd_audio_format & ESD_MASK_FUNC) == ESD_RECORD) {
stream = arts_record_stream(esd_audio_rate, bits, channels, "esd");
} else {
stream = arts_play_stream(esd_audio_rate, bits, channels, "esd");
}
/* fix latency */
arts_stream_set(stream, ARTS_P_BUFFER_TIME, 0);
return 0;
}
void arts_esd_audio_close()
{
arts_close_stream(stream);
arts_exit = 0;
arts_free();
dlclose(handle);
return;
}
int arts_esd_audio_write( void *buffer, int buf_size )
{
return arts_write(stream, buffer, buf_size);
}
int arts_esd_audio_read( void *buffer, int buf_size )
{
return arts_read(stream, buffer, buf_size);
}
void arts_esd_audio_pause()
{
return;
}
void arts_esd_audio_flush()
{
return;
}
static void impl_exit()
{
if ((arts_exit > 0) && (handle)) {
if (err_arts >= 0)
arts_free();
dlclose(handle);
}
}
void artschk()
{
if(arts() >= 0) {
impl_esd_audio_devices = arts_esd_audio_devices;
impl_esd_audio_open = arts_esd_audio_open;
impl_esd_audio_close = arts_esd_audio_close;
impl_esd_audio_pause = arts_esd_audio_pause;
impl_esd_audio_flush = arts_esd_audio_flush;
impl_esd_audio_write = arts_esd_audio_write;
impl_esd_audio_read = arts_esd_audio_read;
}
atexit(impl_exit);
}
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