herrie/src/audio_output_null.c

   1 /*
   2  * Copyright (c) 2006-2011 Ed Schouten <ed@80386.nl>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  */
  26 /**
  27  * @file audio_output_null.c
  28  * @brief Fake audio output driver.
  29  */
  30
  31 #include "stdinc.h"
  32
  33 #include "audio_file.h"
  34 #include "audio_output.h"
  35
  36 int
  37 audio_output_open(void)
  38 {
  39         return (0);
  40 }
  41
  42 int
  43 audio_output_play(struct audio_file *fd)
  44 {
  45         int16_t buf[4096];
  46         size_t len;
  47         unsigned long delay;
  48
  49         if ((len = audio_file_read(fd, buf, sizeof buf / sizeof(int16_t))) == 0)
  50                 return (-1);
  51
  52         /* This should just fit - 2^12 * 10^6 < 2^32 */
  53         delay = (1000000 * len) / (fd->srate * fd->channels);
  54         g_usleep(delay);
  55
  56         return (0);
  57 }
  58
  59 void
  60 audio_output_close(void)
  61 {
  62 }