/* 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 <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 int audioOutputAo_initDriver(AudioOutput * audioOutput, ConfigParam * param) { ao_info * ai; char * dup; char * stk1; char * stk2; char * n1; char * key; char * value; char * test; AoData * ad = newAoData(); BlockParam * blockParam; audioOutput->data = ad; if((blockParam = getBlockParam(param, "write_size"))) { ad->writeSize = strtol(blockParam->value, &test, 10); if (*test!='\0') { ERROR("\"%s\" is not a valid write size at line %i\n", blockParam->value, blockParam->line); exit(EXIT_FAILURE); } } else ad->writeSize = 1024; if(driverInitCount == 0) { ao_initialize(); } driverInitCount++; blockParam = getBlockParam(param, "driver"); if(!blockParam || 0 == strcmp(blockParam->value,"default")) { ad->driverId = ao_default_driver_id(); } else if((ad->driverId = ao_driver_id(blockParam->value))<0) { ERROR("\"%s\" is not a valid ao driver at line %i\n", blockParam->value, blockParam->line); exit(EXIT_FAILURE); } if((ai = ao_driver_info(ad->driverId))==NULL) { ERROR("problems getting driver info for device defined at " "line %i\n", param->line); ERROR("you may not have permission to the audio device\n"); exit(EXIT_FAILURE); } DEBUG("using ao driver \"%s\" for \"%s\"\n", ai->short_name, audioOutput->name); blockParam = getBlockParam(param, "options"); if(blockParam) { dup = strdup(blockParam->value); } else dup = strdup(""); 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); return 0; } static void freeAoData(AoData * ad) { ao_free_options(ad->options); free(ad); } static void audioOutputAo_finishDriver(AudioOutput * audioOutput) { AoData * ad = (AoData *)audioOutput->data; freeAoData(ad); driverInitCount--; if(driverInitCount == 0) ao_shutdown(); } static void audioOutputAo_closeDevice(AudioOutput * audioOutput) { AoData * ad = (AoData *) audioOutput->data; if(ad->device) { ao_close(ad->device); ad->device = NULL; } audioOutput->open = 0; } 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; ad->device = ao_open_live(ad->driverId, &format, ad->options); 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) 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, NULL /* sendMetadataFunc */ };