/* 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 "audioOutput.h" #include "conf.h" #include "log.h" #include "sig_handlers.h" #include <stdlib.h> #include <string.h> #include <assert.h> #include <signal.h> static AudioFormat audio_format; static AudioFormat * audio_configFormat = NULL; static AudioOutput * aoOutput = NULL; static AudioOutput * shoutOutput = NULL; static void copyAudioFormat(AudioFormat * dest, AudioFormat * src) { if(!src) return; dest->sampleRate = src->sampleRate; dest->bits = src->bits; dest->channels = src->channels; } extern AudioOutputPlugin aoPlugin; extern AudioOutputPlugin shoutPlugin; void initAudioDriver() { initAudioOutputPlugins(); loadAudioOutputPlugin(&aoPlugin); loadAudioOutputPlugin(&shoutPlugin); aoOutput = newAudioOutput("ao"); assert(aoOutput); shoutOutput = newAudioOutput("shout"); } void getOutputAudioFormat(AudioFormat * inAudioFormat, AudioFormat * outAudioFormat) { if(audio_configFormat) { copyAudioFormat(outAudioFormat,audio_configFormat); } else copyAudioFormat(outAudioFormat,inAudioFormat); } void initAudioConfig() { 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 finishAudioConfig() { if(audio_configFormat) free(audio_configFormat); } void finishAudioDriver() { finishAudioOutput(aoOutput); if(shoutOutput) finishAudioOutput(shoutOutput); shoutOutput = NULL; aoOutput = NULL; } int isCurrentAudioFormat(AudioFormat * audioFormat) { if(!audioFormat) return 0; if(memcmp(audioFormat,&audio_format,sizeof(AudioFormat)) != 0) return 0; return 1; } int openAudioDevice(AudioFormat * audioFormat) { if(!aoOutput->open || !isCurrentAudioFormat(audioFormat)) { if(audioFormat) copyAudioFormat(&audio_format, audioFormat); if(shoutOutput) openAudioOutput(shoutOutput, &audio_format); return openAudioOutput(aoOutput, &audio_format); } return 0; } int playAudio(char * playChunk, int size) { if(shoutOutput) playAudioOutput(shoutOutput, playChunk, size); return playAudioOutput(aoOutput, playChunk, size); } int isAudioDeviceOpen() { return aoOutput->open; } void closeAudioDevice() { if(shoutOutput) closeAudioOutput(shoutOutput); closeAudioOutput(aoOutput); }