/* 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 audioOutputAo_write_size;
static int audioOutputAo_driver_id;
static ao_option * audioOutputAo_options;
static ao_device * audioOutputAo_device = NULL;
void audioOutputAo_initDriver() {
ao_info * ai;
char * dup;
char * stk1;
char * stk2;
char * n1;
char * key;
char * value;
char * test;
audio_write_size = 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);
}
audio_ao_options = NULL;
ao_initialize();
if(strcmp(AUDIO_AO_DRIVER_DEFAULT,(getConf())[CONF_AO_DRIVER])==0) {
audio_ao_driver_id = ao_default_driver_id();
}
else if((audio_ao_driver_id =
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(audio_ao_driver_id))==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(&audio_ao_options,key,value);
n1 = strtok_r(NULL,";",&stk1);
}
}
free(dup);
}
void audioOutputAo_initConfig() {
char * conf = getConf()[CONF_AUDIO_OUTPUT_FORMAT];
char * test;
if(NULL == conf) return;
audio_configFormat = malloc(sizeof(AudioFormat));
memset(audio_configFormat,0,sizeof(AudioFormat));
audio_configFormat->sampleRate = strtol(conf,&test,10);
if(*test!=':') {
ERROR("error parsing audio output format: %s\n",conf);
exit(EXIT_FAILURE);
}
/*switch(audio_configFormat->sampleRate) {
case 48000:
case 44100:
case 32000:
case 16000:
break;
default:
ERROR("sample rate %i can not be used for audio output\n",
(int)audio_configFormat->sampleRate);
exit(EXIT_FAILURE);
}*/
if(audio_configFormat->sampleRate <= 0) {
ERROR("sample rate %i is not >= 0\n",
(int)audio_configFormat->sampleRate);
exit(EXIT_FAILURE);
}
audio_configFormat->bits = strtol(test+1,&test,10);
if(*test!=':') {
ERROR("error parsing audio output format: %s\n",conf);
exit(EXIT_FAILURE);
}
switch(audio_configFormat->bits) {
case 16:
break;
default:
ERROR("bits %i can not be used for audio output\n",
(int)audio_configFormat->bits);
exit(EXIT_FAILURE);
}
audio_configFormat->channels = strtol(test+1,&test,10);
if(*test!='\0') {
ERROR("error parsing audio output format: %s\n",conf);
exit(EXIT_FAILURE);
}
switch(audio_configFormat->channels) {
case 2:
break;
default:
ERROR("channels %i can not be used for audio output\n",
(int)audio_configFormat->channels);
exit(EXIT_FAILURE);
}
}
void audioOutputAo_finishConfig() {
if(audio_configFormat) free(audio_configFormat);
}
void audioOutputAo_finishDriver() {
ao_free_options(audio_ao_options);
ao_shutdown();
}
int audioOutputAo_openDevice(AudioFormat * audioFormat) {
ao_sample_format format;
if(audio_device && !isCurrentAudioFormat(audioFormat)) {
closeAudioDevice();
}
if(!audio_device) {
if(audioFormat) {
copyAudioFormat(&audio_format,audioFormat);
}
format.bits = audio_format.bits;
format.rate = audio_format.sampleRate;
format.byte_format = AO_FMT_NATIVE;
format.channels = audio_format.channels;
blockSignals();
audio_device = ao_open_live(audio_ao_driver_id, &format,
audio_ao_options);
unblockSignals();
if(audio_device==NULL) return -1;
}
return 0;
}
int audioOutputAo_playAudio(char * playChunk, int size) {
int send;
if(audio_device==NULL) {
ERROR("trying to play w/o the audio device being open!\n");
return -1;
}
while(size>0) {
send = audio_write_size>size?size:audio_write_size;
if(ao_play(audio_device,playChunk,send)==0) {
audioError();
ERROR("closing audio device due to write error\n");
closeAudioDevice();
return -1;
}
playChunk+=send;
size-=send;
}
return 0;
}
void audioOutputAo_closeAudioDevice() {
if(audio_device) {
blockSignals();
ao_close(audio_device);
audio_device = NULL;
unblockSignals();
}
}
AudioOutputPlugin aoPlugin =
{
"ao",
audioOutputAo_initConfig,
audioOutputAo_finishConfig,
audioOutputAo_initDriver,
audioOutputAo_finishDriver,
audioOutputAo_openDevice,
audioOutputAo_play,
audioOutputAo_closeDevice
};
