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Diffstat (limited to 'src/audioOutput_ao.c')
| -rw-r--r-- | src/audioOutput_ao.c | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/src/audioOutput_ao.c b/src/audioOutput_ao.c new file mode 100644 index 000000000..385efe2ff --- /dev/null +++ b/src/audioOutput_ao.c @@ -0,0 +1,262 @@ +/* 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 +}; |