src/audio.h

   1 /* the Music Player Daemon (MPD)
   2  * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
   3  * This project's homepage is: http://www.musicpd.org
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #ifndef AUDIO_H
  20 #define AUDIO_H
  21
  22 #include "../config.h"
  23
  24 #include "mpd_types.h"
  25 #include "tag.h"
  26
  27 #include <stdio.h>
  28
  29 #define AUDIO_AO_DRIVER_DEFAULT "default"
  30
  31 typedef struct _AudioFormat {
  32         volatile mpd_sint8 channels;
  33         volatile mpd_uint32 sampleRate;
  34         volatile mpd_sint8 bits;
  35 } AudioFormat;
  36
  37 size_t audio_device_count(void);
  38
  39 void copyAudioFormat(AudioFormat * dest, AudioFormat * src);
  40
  41 int cmpAudioFormat(AudioFormat * dest, AudioFormat * src);
  42
  43 void getOutputAudioFormat(AudioFormat * inFormat, AudioFormat * outFormat);
  44
  45 int parseAudioConfig(AudioFormat * audioFormat, char *conf);
  46
  47 /* make sure initPlayerData is called before this function!! */
  48 void initAudioConfig(void);
  49
  50 void finishAudioConfig(void);
  51
  52 void initAudioDriver(void);
  53
  54 void finishAudioDriver(void);
  55
  56 int openAudioDevice(AudioFormat * audioFormat);
  57
  58 int playAudio(char *playChunk, int size);
  59
  60 void dropBufferedAudio(void);
  61
  62 void closeAudioDevice(void);
  63
  64 int isAudioDeviceOpen(void);
  65
  66 int isCurrentAudioFormat(AudioFormat * audioFormat);
  67
  68 void sendMetadataToAudioDevice(MpdTag * tag);
  69
  70 /* these functions are called in the main parent process while the child
  71         process is busy playing to the audio */
  72 int enableAudioDevice(int fd, int device);
  73
  74 int disableAudioDevice(int fd, int device);
  75
  76 void printAudioDevices(int fd);
  77
  78 void readAudioDevicesState(FILE *fp);
  79
  80 void saveAudioDevicesState(FILE *fp);
  81
  82 void loadAudioDrivers(void);
  83 #endif