src/audioOutputs/audioOutput_null.c

   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 #include "../audioOutput.h"
  20 #include "../timer.h"
  21
  22 static int null_initDriver(AudioOutput *audioOutput, ConfigParam *param)
  23 {
  24         audioOutput->data = NULL;
  25         return 0;
  26 }
  27
  28 static int null_openDevice(AudioOutput *audioOutput)
  29 {
  30         audioOutput->data = timer_new(&audioOutput->outAudioFormat);
  31         audioOutput->open = 1;
  32         return 0;
  33 }
  34
  35 static void null_closeDevice(AudioOutput *audioOutput)
  36 {
  37         if (audioOutput->data) {
  38                 timer_free(audioOutput->data);
  39                 audioOutput->data = NULL;
  40         }
  41
  42         audioOutput->open = 0;
  43 }
  44
  45 static int null_playAudio(AudioOutput *audioOutput, char *playChunk, int size)
  46 {
  47         Timer *timer = audioOutput->data;
  48
  49         if (!timer->started)
  50                 timer_start(timer);
  51         else
  52                 timer_sync(timer);
  53
  54         timer_add(timer, size);
  55
  56         return 0;
  57 }
  58
  59 static void null_dropBufferedAudio(AudioOutput *audioOutput)
  60 {
  61         timer_reset(audioOutput->data);
  62 }
  63
  64 AudioOutputPlugin nullPlugin = {
  65         "null",
  66         NULL,
  67         null_initDriver,
  68         NULL,
  69         null_openDevice,
  70         null_playAudio,
  71         null_dropBufferedAudio,
  72         null_closeDevice,
  73         NULL,
  74 };