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-rw-r--r--src/audio.c199
1 files changed, 199 insertions, 0 deletions
diff --git a/src/audio.c b/src/audio.c
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+++ b/src/audio.c
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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 "audio.h"
+#include "conf.h"
+#include "log.h"
+#include "sig_handlers.h"
+
+#include <string.h>
+#include <assert.h>
+#include <signal.h>
+
+int audio_write_size;
+
+int audio_ao_driver_id;
+ao_option * audio_ao_options;
+
+AudioFormat audio_format;
+ao_device * audio_device = NULL;
+
+void initAudioDriver() {
+ ao_info * ai;
+ char * dup;
+ char * stk1;
+ char * stk2;
+ char * n1;
+ char * key;
+ char * value;
+ char * test;
+ /*int found;
+ int i;*/
+
+ 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(-1);
+ }
+
+ 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(-1);
+ }
+
+ 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(-1);
+ }
+
+ 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(-1);
+ }
+ /*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(-1);
+ }*/
+ value = strtok_r(NULL,"",&stk2);
+ if(!value) {
+ ERROR("problems parsing "
+ "ao_driver_options \"%s\"\n", n1);
+ exit(-1);
+ }
+ ao_append_option(&audio_ao_options,key,value);
+ n1 = strtok_r(NULL,";",&stk1);
+ }
+ }
+ free(dup);
+}
+
+void finishAudioDriver() {
+ ao_free_options(audio_ao_options);
+
+ ao_shutdown();
+}
+
+int isCurrentAudioFormat(AudioFormat * audioFormat) {
+ if(!audio_device) return 0;
+
+ if(audio_format.bits!=audioFormat->bits ||
+ audio_format.sampleRate!=audioFormat->sampleRate ||
+ audio_format.channels!=audioFormat->channels)
+ {
+ return 0;
+ }
+
+ return 1;
+}
+
+int initAudio(AudioFormat * audioFormat) {
+ ao_sample_format format;
+
+ if(!isCurrentAudioFormat(audioFormat)) {
+ finishAudio();
+ }
+
+ if(!audio_device) {
+ format.bits = audioFormat->bits;
+ format.rate = audioFormat->sampleRate;
+ format.byte_format = AO_FMT_NATIVE;
+ format.channels = audioFormat->channels;
+ audio_format.bits = format.bits;
+ audio_format.sampleRate = format.rate;
+ audio_format.channels = format.channels;
+
+ blockSignals();
+
+ audio_device = ao_open_live(audio_ao_driver_id, &format,
+ audio_ao_options);
+
+ if(audio_device==NULL) {
+ unblockSignals();
+ audioError();
+ return -1;
+ }
+ unblockSignals();
+ }
+
+ return 0;
+}
+
+
+void playAudio(char * playChunk, int size) {
+ int send;
+
+ assert(audio_device!=NULL);
+
+ while(size>0) {
+ send = audio_write_size>size?size:audio_write_size;
+
+ ao_play(audio_device,playChunk,send);
+
+ playChunk+=send;
+ size-=send;
+ }
+}
+
+void finishAudio() {
+ if(audio_device) {
+ blockSignals();
+ ao_close(audio_device);
+ audio_device = NULL;
+ unblockSignals();
+ }
+}
+
+void audioError() {
+ ERROR("Error opening audio device\n");
+ 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");
+ }
+}