diff options
Diffstat (limited to 'src/audioOutput/audioOutput_ao.c')
| -rw-r--r-- | src/audioOutput/audioOutput_ao.c | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/src/audioOutput/audioOutput_ao.c b/src/audioOutput/audioOutput_ao.c new file mode 100644 index 000000000..366c42c1d --- /dev/null +++ b/src/audioOutput/audioOutput_ao.c @@ -0,0 +1,243 @@ +/* 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 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); + } + + 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) { + blockSignals(); + ao_close(ad->device); + ad->device = NULL; + unblockSignals(); + } + + 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; + + blockSignals(); + ad->device = ao_open_live(ad->driverId, &format, ad->options); + unblockSignals(); + + 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 */ +}; |