/* the Music Player Daemon (MPD) * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com) * 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 "list.h" #include "log.h" #include "pcm_utils.h" #include <string.h> #define AUDIO_OUTPUT_TYPE "type" #define AUDIO_OUTPUT_NAME "name" #define AUDIO_OUTPUT_FORMAT "format" static List *audioOutputPluginList; void loadAudioOutputPlugin(AudioOutputPlugin * audioOutputPlugin) { if (!audioOutputPlugin->name) return; insertInList(audioOutputPluginList, audioOutputPlugin->name, audioOutputPlugin); } void unloadAudioOutputPlugin(AudioOutputPlugin * audioOutputPlugin) { if (!audioOutputPlugin->name) return; deleteFromList(audioOutputPluginList, audioOutputPlugin->name); } void initAudioOutputPlugins(void) { audioOutputPluginList = makeList(NULL, 0); } void finishAudioOutputPlugins(void) { freeList(audioOutputPluginList); } #define getBlockParam(name, str, force) { \ bp = getBlockParam(param, name); \ if(force && bp == NULL) { \ FATAL("couldn't find parameter \"%s\" in audio output " \ "definition beginning at %i\n", \ name, param->line); \ } \ if(bp) str = bp->value; \ } int initAudioOutput(AudioOutput *ao, ConfigParam * param) { void *data = NULL; char *name = NULL; char *format = NULL; char *type = NULL; BlockParam *bp = NULL; AudioOutputPlugin *plugin = NULL; if (param) { getBlockParam(AUDIO_OUTPUT_NAME, name, 1); getBlockParam(AUDIO_OUTPUT_TYPE, type, 1); getBlockParam(AUDIO_OUTPUT_FORMAT, format, 0); if (!findInList(audioOutputPluginList, type, &data)) { FATAL("couldn't find audio output plugin for type " "\"%s\" at line %i\n", type, param->line); } plugin = (AudioOutputPlugin *) data; } else { ListNode *node = audioOutputPluginList->firstNode; WARNING("No \"%s\" defined in config file\n", CONF_AUDIO_OUTPUT); WARNING("Attempt to detect audio output device\n"); while (node) { plugin = (AudioOutputPlugin *) node->data; if (plugin->testDefaultDeviceFunc) { WARNING("Attempting to detect a %s audio " "device\n", plugin->name); if (plugin->testDefaultDeviceFunc() == 0) { WARNING("Successfully detected a %s " "audio device\n", plugin->name); break; } } node = node->nextNode; } if (!node) { WARNING("Unable to detect an audio device\n"); return 0; } name = "default detected output"; type = plugin->name; } ao->name = name; ao->type = type; ao->finishDriverFunc = plugin->finishDriverFunc; ao->openDeviceFunc = plugin->openDeviceFunc; ao->playFunc = plugin->playFunc; ao->dropBufferedAudioFunc = plugin->dropBufferedAudioFunc; ao->closeDeviceFunc = plugin->closeDeviceFunc; ao->sendMetdataFunc = plugin->sendMetdataFunc; ao->open = 0; ao->convertAudioFormat = 0; ao->sameInAndOutFormats = 0; ao->convBuffer = NULL; ao->convBufferLen = 0; memset(&ao->inAudioFormat, 0, sizeof(AudioFormat)); memset(&ao->outAudioFormat, 0, sizeof(AudioFormat)); memset(&ao->reqAudioFormat, 0, sizeof(AudioFormat)); memset(&ao->convState, 0, sizeof(ConvState)); if (format) { ao->convertAudioFormat = 1; if (0 != parseAudioConfig(&ao->reqAudioFormat, format)) { FATAL("error parsing format at line %i\n", bp->line); } copyAudioFormat(&ao->outAudioFormat, &ao->reqAudioFormat); } if (plugin->initDriverFunc(ao, param) != 0) return 0; return 1; } int openAudioOutput(AudioOutput * audioOutput, AudioFormat * audioFormat) { int ret = 0; if (audioOutput->open && 0 == cmpAudioFormat(audioFormat, &audioOutput->inAudioFormat)) { return 0; } copyAudioFormat(&audioOutput->inAudioFormat, audioFormat); if (audioOutput->convertAudioFormat) { copyAudioFormat(&audioOutput->outAudioFormat, &audioOutput->reqAudioFormat); } else { copyAudioFormat(&audioOutput->outAudioFormat, &audioOutput->inAudioFormat); if (audioOutput->open) closeAudioOutput(audioOutput); } if (!audioOutput->open) ret = audioOutput->openDeviceFunc(audioOutput); audioOutput->sameInAndOutFormats = !cmpAudioFormat(&audioOutput->inAudioFormat, &audioOutput->outAudioFormat); return ret; } static void convertAudioFormat(AudioOutput * audioOutput, char **chunkArgPtr, int *sizeArgPtr) { int size = pcm_sizeOfConvBuffer(&(audioOutput->inAudioFormat), *sizeArgPtr, &(audioOutput->outAudioFormat)); if (size > audioOutput->convBufferLen) { audioOutput->convBuffer = xrealloc(audioOutput->convBuffer, size); audioOutput->convBufferLen = size; } *sizeArgPtr = pcm_convertAudioFormat(&(audioOutput->inAudioFormat), *chunkArgPtr, *sizeArgPtr, &(audioOutput->outAudioFormat), audioOutput->convBuffer, &audioOutput->convState); *chunkArgPtr = audioOutput->convBuffer; } int playAudioOutput(AudioOutput * audioOutput, char *playChunk, int size) { int ret; if (!audioOutput->open) return -1; if (!audioOutput->sameInAndOutFormats) { convertAudioFormat(audioOutput, &playChunk, &size); } ret = audioOutput->playFunc(audioOutput, playChunk, size); return ret; } void dropBufferedAudioOutput(AudioOutput * audioOutput) { if (audioOutput->open) audioOutput->dropBufferedAudioFunc(audioOutput); } void closeAudioOutput(AudioOutput * audioOutput) { if (audioOutput->open) audioOutput->closeDeviceFunc(audioOutput); } void finishAudioOutput(AudioOutput * audioOutput) { closeAudioOutput(audioOutput); if (audioOutput->finishDriverFunc) audioOutput->finishDriverFunc(audioOutput); if (audioOutput->convBuffer) free(audioOutput->convBuffer); } void sendMetadataToAudioOutput(AudioOutput * audioOutput, MpdTag * tag) { if (!audioOutput->sendMetdataFunc) return; audioOutput->sendMetdataFunc(audioOutput, tag); } void printAllOutputPluginTypes(FILE * fp) { ListNode *node = audioOutputPluginList->firstNode; AudioOutputPlugin *plugin; while (node) { plugin = (AudioOutputPlugin *) node->data; fprintf(fp, "%s ", plugin->name); node = node->nextNode; } fprintf(fp, "\n"); fflush(fp); }