/* 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 "command.h" #include "playerData.h" #include "utils.h" #include "playlist.h" #include <stdlib.h> #include <string.h> #include <assert.h> #include <signal.h> #include <sys/stat.h> #include <sys/param.h> #include <errno.h> #include <unistd.h> #define AUDIO_DEVICE_STATE "audio_device_state:" #define AUDIO_DEVICE_STATE_LEN 19 /* strlen(AUDIO_DEVICE_STATE) */ #define AUDIO_BUFFER_SIZE 2*MAXPATHLEN static AudioFormat audio_format; static AudioFormat * audio_configFormat = NULL; static AudioOutput ** audioOutputArray = NULL; static mpd_uint8 audioOutputArraySize = 0; /* the audioEnabledArray should be stuck into shared memory, and then disable and enable in playAudio() routine */ static mpd_sint8 * pdAudioDevicesEnabled = NULL; static mpd_sint8 myAudioDevicesEnabled[AUDIO_MAX_DEVICES]; static mpd_uint8 audioOpened = 0; static mpd_sint32 audioBufferSize = 0; static char * audioBuffer = NULL; static mpd_sint32 audioBufferPos = 0; void copyAudioFormat(AudioFormat * dest, AudioFormat * src) { if(!src) return; memcpy(dest, src, sizeof(AudioFormat)); } int cmpAudioFormat(AudioFormat * f1, AudioFormat * f2) { if (f1 && f2 && (f1->sampleRate == f2->sampleRate) && (f1->bits == f2->bits) && (f1->channels == f2->channels)) return 0; return 1; } extern AudioOutputPlugin alsaPlugin; extern AudioOutputPlugin aoPlugin; extern AudioOutputPlugin ossPlugin; extern AudioOutputPlugin osxPlugin; extern AudioOutputPlugin mvpPlugin; extern AudioOutputPlugin shoutPlugin; /* make sure initPlayerData is called before this function!! */ void initAudioDriver() { ConfigParam * param = NULL; int i; initAudioOutputPlugins(); loadAudioOutputPlugin(&alsaPlugin); loadAudioOutputPlugin(&aoPlugin); loadAudioOutputPlugin(&ossPlugin); loadAudioOutputPlugin(&osxPlugin); loadAudioOutputPlugin(&mvpPlugin); loadAudioOutputPlugin(&shoutPlugin); pdAudioDevicesEnabled = (getPlayerData())->audioDeviceEnabled; for(i = 0; i < AUDIO_MAX_DEVICES; i++) { pdAudioDevicesEnabled[i] = 1; myAudioDevicesEnabled[i] = 1; } param = getNextConfigParam(CONF_AUDIO_OUTPUT, param); do { AudioOutput *output; int j; if(audioOutputArraySize == AUDIO_MAX_DEVICES) { ERROR("only up to 255 audio output devices are " "supported"); exit(EXIT_FAILURE); } i = audioOutputArraySize++; audioOutputArray = realloc(audioOutputArray, audioOutputArraySize*sizeof(AudioOutput *)); output = newAudioOutput(param); if(!output && param) { ERROR("problems configuring output device defined at " "line %i\n", param->line); exit(EXIT_FAILURE); } /* require output names to be unique: */ for (j = i - 1; j >= 0; --j) { if ( !strcmp( output->name, audioOutputArray[j]->name) ) { ERROR("output devices with identical " "names: %s\n", output->name); exit(EXIT_FAILURE); } } audioOutputArray[i] = output; } while((param = getNextConfigParam(CONF_AUDIO_OUTPUT, param))); } void getOutputAudioFormat(AudioFormat * inAudioFormat, AudioFormat * outAudioFormat) { if(audio_configFormat) { copyAudioFormat(outAudioFormat,audio_configFormat); } else copyAudioFormat(outAudioFormat,inAudioFormat); } void initAudioConfig() { ConfigParam * param = getConfigParam(CONF_AUDIO_OUTPUT_FORMAT); if(NULL == param || NULL == param->value) return; audio_configFormat = malloc(sizeof(AudioFormat)); if(0 != parseAudioConfig(audio_configFormat, param->value)) { ERROR("error parsing \"%s\" at line %i\n", CONF_AUDIO_OUTPUT_FORMAT, param->line); exit(EXIT_FAILURE); } } int parseAudioConfig(AudioFormat * audioFormat, char * conf) { char * test; memset(audioFormat,0,sizeof(AudioFormat)); audioFormat->sampleRate = strtol(conf,&test,10); if(*test!=':') { ERROR("error parsing audio output format: %s\n",conf); return -1; } /*switch(audioFormat->sampleRate) { case 48000: case 44100: case 32000: case 16000: break; default: ERROR("sample rate %i can not be used for audio output\n", (int)audioFormat->sampleRate); return -1 }*/ if(audioFormat->sampleRate <= 0) { ERROR("sample rate %i is not >= 0\n", (int)audioFormat->sampleRate); return -1; } audioFormat->bits = strtol(test+1,&test,10); if(*test!=':') { ERROR("error parsing audio output format: %s\n",conf); return -1; } switch(audioFormat->bits) { case 16: break; default: ERROR("bits %i can not be used for audio output\n", (int)audioFormat->bits); return -1; } audioFormat->channels = strtol(test+1,&test,10); if(*test!='\0') { ERROR("error parsing audio output format: %s\n",conf); return -1; } switch(audioFormat->channels) { case 1: case 2: break; default: ERROR("channels %i can not be used for audio output\n", (int)audioFormat->channels); return -1; } return 0; } void finishAudioConfig() { if(audio_configFormat) free(audio_configFormat); } void finishAudioDriver() { int i; for(i = 0; i < audioOutputArraySize; i++) { finishAudioOutput(audioOutputArray[i]); } free(audioOutputArray); audioOutputArray = NULL; audioOutputArraySize = 0; } int isCurrentAudioFormat(AudioFormat * audioFormat) { if(!audioFormat) return 1; if(cmpAudioFormat(audioFormat, &audio_format) != 0) return 0; return 1; } inline void syncAudioDevicesEnabledArrays() { int i; memcpy(myAudioDevicesEnabled, pdAudioDevicesEnabled,AUDIO_MAX_DEVICES); for(i = 0; i < audioOutputArraySize; i++) { if(myAudioDevicesEnabled[i]) { openAudioOutput(audioOutputArray[i], &audio_format); } else { dropBufferedAudioOutput(audioOutputArray[i]); closeAudioOutput(audioOutputArray[i]); } } } static int flushAudioBuffer() { int ret = -1; int i; if(audioBufferPos == 0) return 0; if(0 != memcmp(pdAudioDevicesEnabled, myAudioDevicesEnabled, AUDIO_MAX_DEVICES)) { syncAudioDevicesEnabledArrays(); } for(i = 0; i < audioOutputArraySize; i++) { if(!myAudioDevicesEnabled[i]) continue; if(0 == playAudioOutput(audioOutputArray[i], audioBuffer, audioBufferPos)) { ret = 0; } } audioBufferPos = 0; return ret; } int openAudioDevice(AudioFormat * audioFormat) { int isCurrentFormat = isCurrentAudioFormat(audioFormat); int ret = -1; int i; if(!audioOutputArray) return -1; if(!audioOpened || !isCurrentFormat) { flushAudioBuffer(); copyAudioFormat(&audio_format, audioFormat); audioBufferSize = (audio_format.bits >> 3)* audio_format.channels; audioBufferSize*= audio_format.sampleRate >> 5; audioBuffer = realloc(audioBuffer, audioBufferSize); } syncAudioDevicesEnabledArrays(); for(i = 0; i < audioOutputArraySize; i++) { if(audioOutputArray[i]->open) ret = 0; } if(ret == 0) audioOpened = 1; else { /* close all devices if there was an error */ for(i = 0; i < audioOutputArraySize; i++) { closeAudioOutput(audioOutputArray[i]); } audioOpened = 0; } return ret; } int playAudio(char * playChunk, int size) { int send; while(size > 0) { send = audioBufferSize-audioBufferPos; send = send < size ? send : size; memcpy(audioBuffer+audioBufferPos, playChunk, send); audioBufferPos += send; size -= send; playChunk+= send; if(audioBufferPos == audioBufferSize) { if( flushAudioBuffer() < 0 ) return -1; } } return 0; } int isAudioDeviceOpen() { return audioOpened; } void dropBufferedAudio() { int i; if(0 != memcmp(pdAudioDevicesEnabled, myAudioDevicesEnabled, AUDIO_MAX_DEVICES)) { syncAudioDevicesEnabledArrays(); } audioBufferPos = 0; for(i = 0; i < audioOutputArraySize; i++) { if(!myAudioDevicesEnabled[i]) continue; dropBufferedAudioOutput(audioOutputArray[i]); } } void closeAudioDevice() { int i; flushAudioBuffer(); free(audioBuffer); audioBuffer = NULL; audioBufferSize = 0; for(i = 0; i < audioOutputArraySize; i++) { closeAudioOutput(audioOutputArray[i]); } audioOpened = 0; } void sendMetadataToAudioDevice(MpdTag * tag) { int i; for(i = 0; i < audioOutputArraySize; i++) { sendMetadataToAudioOutput(audioOutputArray[i], tag); } } int enableAudioDevice(FILE * fp, int device) { if(device < 0 || device >= audioOutputArraySize) { commandError(fp, ACK_ERROR_ARG, "audio output device id %i " "doesn't exist\n", device); return -1; } pdAudioDevicesEnabled[device] = 1; return 0; } int disableAudioDevice(FILE * fp, int device) { if(device < 0 || device >= audioOutputArraySize) { commandError(fp, ACK_ERROR_ARG, "audio output device id %i " "doesn't exist\n", device); return -1; } pdAudioDevicesEnabled[device] = 0; return 0; } void printAudioDevices(FILE * fp) { int i; for(i = 0; i < audioOutputArraySize; i++) { myfprintf(fp, "outputid: %i\n", i); myfprintf(fp, "outputname: %s\n", audioOutputArray[i]->name); myfprintf(fp, "outputenabled: %i\n", (int)pdAudioDevicesEnabled[i]); } } void saveAudioDevicesState() { char *stateFile; FILE *fp; int i; if (!(stateFile = getStateFile())) return; while(!(fp = fopen(stateFile,"a")) && errno==EINTR); if(!fp) { ERROR("problems opening state file \"%s\" for " "writing: %s\n", stateFile, strerror(errno)); return; } assert(audioOutputArraySize != 0); for (i = 0; i < audioOutputArraySize; i++) { myfprintf(fp, AUDIO_DEVICE_STATE "%d:%s\n", (int)pdAudioDevicesEnabled[i], audioOutputArray[i]->name); } while(fclose(fp) && errno==EINTR); } static void parse_audio_device_state(FILE *fp) { char buffer[AUDIO_BUFFER_SIZE]; int i; assert(audioOutputArraySize != 0); while (myFgets(buffer,AUDIO_BUFFER_SIZE,fp)) { char *c, *name; if (strncmp(buffer,AUDIO_DEVICE_STATE,AUDIO_DEVICE_STATE_LEN)) continue; c = strchr(buffer,':'); if (!c || !(++c)) goto errline; name = strchr(c,':'); if (!name || !(++name)) goto errline; for (i = audioOutputArraySize - 1; i >= 0; --i) { if (!strcmp(name, audioOutputArray[i]->name)) { pdAudioDevicesEnabled[i] = atoi(c); break; } } continue; errline: /* nonfatal */ ERROR("invalid line in state_file: %s\n", buffer); } } void readAudioDevicesState() { char *stateFile; FILE *fp; struct stat st; if (!(stateFile = getStateFile())) return; if(stat(stateFile,&st)<0) { DEBUG("failed to stat state file\n"); return; } if(!S_ISREG(st.st_mode)) { ERROR("state file \"%s\" is not a regular file\n", stateFile); exit(EXIT_FAILURE); } fp = fopen(stateFile,"r"); if(!fp) { ERROR("problems opening state file \"%s\" for " "reading: %s\n", stateFile, strerror(errno)); exit(EXIT_FAILURE); } parse_audio_device_state(fp); fclose(fp); }