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/* the Music Player Daemon (MPD)
* (c)2003-2004 by Warren Dukes (shank@mercury.chem.pitt.edu)
* This project's homepage is: http://www.musicpd.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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "audioOutput.h"
#include "conf.h"
#include "log.h"
#include "sig_handlers.h"
#include <string.h>
#include <assert.h>
#include <signal.h>
#include <ao/ao.h>
static int driverInitCount = 0;
typedef struct _AoData {
int writeSize;
int driverId;
ao_option * options;
ao_device * device;
} AoData;
static AoData * newAoData() {
AoData * ret = malloc(sizeof(AoData));
ret->device = NULL;
ret->options = NULL;
return ret;
}
static void audioOutputAo_error() {
if(errno==AO_ENOTLIVE) {
ERROR("not a live ao device\n");
}
else if(errno==AO_EOPENDEVICE) {
ERROR("not able to open audio device\n");
}
else if(errno==AO_EBADOPTION) {
ERROR("bad driver option\n");
}
}
static void audioOutputAo_initDriver(AudioOutput * audioOutput) {
ao_info * ai;
char * dup;
char * stk1;
char * stk2;
char * n1;
char * key;
char * value;
char * test;
AoData * ad = newAoData();
audioOutput->data = ad;
ad->writeSize = strtol((getConf())[CONF_AUDIO_WRITE_SIZE],&test,10);
if (*test!='\0') {
ERROR("\"%s\" is not a valid write size",
(getConf())[CONF_AUDIO_WRITE_SIZE]);
exit(EXIT_FAILURE);
}
if(driverInitCount == 0) {
ao_initialize();
}
driverInitCount++;
if(strcmp(AUDIO_AO_DRIVER_DEFAULT,(getConf())[CONF_AO_DRIVER])==0) {
ad->driverId = ao_default_driver_id();
}
else if((ad->driverId =
ao_driver_id((getConf())[CONF_AO_DRIVER]))<0) {
ERROR("\"%s\" is not a valid ao driver\n",
(getConf())[CONF_AO_DRIVER]);
exit(EXIT_FAILURE);
}
if((ai = ao_driver_info(ad->driverId))==NULL) {
ERROR("problems getting ao_driver_info\n");
ERROR("you may not have permission to the audio device\n");
exit(EXIT_FAILURE);
}
dup = strdup((getConf())[CONF_AO_DRIVER_OPTIONS]);
if(strlen(dup)) {
stk1 = NULL;
n1 = strtok_r(dup,";",&stk1);
while(n1) {
stk2 = NULL;
key = strtok_r(n1,"=",&stk2);
if(!key) {
ERROR("problems parsing "
"ao_driver_options \"%s\"\n", n1);
exit(EXIT_FAILURE);
}
/*found = 0;
for(i=0;i<ai->option_count;i++) {
if(strcmp(ai->options[i],key)==0) {
found = 1;
break;
}
}
if(!found) {
ERROR("\"%s\" is not an option for "
"\"%s\" ao driver\n",key,
ai->short_name);
exit(EXIT_FAILURE);
}*/
value = strtok_r(NULL,"",&stk2);
if(!value) {
ERROR("problems parsing "
"ao_driver_options \"%s\"\n", n1);
exit(EXIT_FAILURE);
}
ao_append_option(&ad->options,key,value);
n1 = strtok_r(NULL,";",&stk1);
}
}
free(dup);
}
static void audioOutputAo_finishDriver(AudioOutput * audioOutput) {
AoData * ad = (AoData *)audioOutput->data;
ao_free_options(ad->options);
driverInitCount--;
if(driverInitCount == 0) ao_shutdown();
}
static void audioOutputAo_closeDevice(AudioOutput * audioOutput) {
AoData * ad = (AoData *) audioOutput->data;
if(ad->device) {
blockSignals();
ao_close(ad->device);
audioOutput->open = 0;
ad->device = NULL;
unblockSignals();
}
}
static int audioOutputAo_openDevice(AudioOutput * audioOutput,
AudioFormat * audioFormat)
{
ao_sample_format format;
AoData * ad = (AoData *)audioOutput->data;
if(ad->device) {
audioOutputAo_closeDevice(audioOutput);
}
format.bits = audioFormat->bits;
format.rate = audioFormat->sampleRate;
format.byte_format = AO_FMT_NATIVE;
format.channels = audioFormat->channels;
blockSignals();
ad->device = ao_open_live(ad->driverId, &format, ad->options);
unblockSignals();
if(ad->device==NULL) return -1;
audioOutput->open = 1;
return 0;
}
static int audioOutputAo_play(AudioOutput * audioOutput, char * playChunk,
int size)
{
int send;
AoData * ad = (AoData *)audioOutput->data;
if(ad->device==NULL) {
ERROR("trying to play w/o the ao device being open!\n");
return -1;
}
while(size>0) {
send = ad->writeSize > size ? size : ad->writeSize;
if(ao_play(ad->device, playChunk, send)==0) {
audioOutputAo_error();
ERROR("closing audio device due to write error\n");
audioOutputAo_closeDevice(audioOutput);
return -1;
}
playChunk+=send;
size-=send;
}
return 0;
}
AudioOutputPlugin aoPlugin =
{
"ao",
audioOutputAo_initDriver,
audioOutputAo_finishDriver,
audioOutputAo_openDevice,
audioOutputAo_play,
audioOutputAo_closeDevice
};
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