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Diffstat (limited to '')
| -rw-r--r-- | src/audio.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/src/audio.c b/src/audio.c new file mode 100644 index 000000000..f014235df --- /dev/null +++ b/src/audio.c @@ -0,0 +1,199 @@ +/* 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"); + } +} |