mdw@git.distorted.org.uk Git - jog/blob - ausys-fake.c

   1 /* -*-c-*-
   2  *
   3  * $Id: ausys-fake.c,v 1.1 2002/02/02 19:16:28 mdw Exp $
   4  *
   5  * Fake not-audio-at-all audio driver
   6  *
   7  * (c) 2002 Mark Wooding
   8  */
   9
  10 /*----- Licensing notice --------------------------------------------------*
  11  *
  12  * This file is part of Jog: Programming for a jogging machine.
  13  *
  14  * Jog is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License as published by
  16  * the Free Software Foundation; either version 2 of the License, or
  17  * (at your option) any later version.
  18  *
  19  * Jog is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU General Public License
  25  * along with Jog; if not, write to the Free Software Foundation,
  26  * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  27  */
  28
  29 /*----- Header files ------------------------------------------------------*/
  30
  31 #ifdef HAVE_CONFIG_H
  32 #  include "config.h"
  33 #endif
  34
  35 #include <stdio.h>
  36 #include <string.h>
  37
  38 #include <mLib/alloc.h>
  39 #include <mLib/sub.h>
  40 #include <mLib/trace.h>
  41
  42 #include "au.h"
  43 #include "ausys.h"
  44 #include "jog.h"
  45
  46 /*----- Global variables --------------------------------------------------*/
  47
  48 const char *const ausys_suffix = "txt";
  49
  50 /*----- Main code ---------------------------------------------------------*/
  51
  52 /* --- @ausys_init@ --- *
  53  *
  54  * Arguments:   ---
  55  *
  56  * Returns:     ---
  57  *
  58  * Use:         Does any initialization required by the system-specific audio
  59  *              handler.
  60  */
  61
  62 void ausys_init(void)
  63 {
  64   T( trace(T_AUSYS, "ausys: initalized ok"); )
  65 }
  66
  67 /* --- @ausys_shutdown@ --- *
  68  *
  69  * Arguments:   ---
  70  *
  71  * Returns:     ---
  72  *
  73  * Use:         Does any tidying up required.
  74  */
  75
  76 void ausys_shutdown(void)
  77 {
  78   T( trace(T_AUSYS, "ausys: shut down ok"); )
  79 }
  80
  81 /* --- @ausys_lock@, @ausys_unlock@ --- *
  82  *
  83  * Arguments:   ---
  84  *
  85  * Returns:     ---
  86  *
  87  * Use:         Locks or unlocks the audio subsystem.  This protects the
  88  *              audio queue from becoming corrupted during all the tedious
  89  *              asynchronous stuff.
  90  */
  91
  92 void ausys_lock(void) { T( trace(T_AUSYS, "ausys: acquired lock"); ) ; }
  93 void ausys_unlock(void) { T( trace(T_AUSYS, "ausys: released lock"); ) ; }
  94
  95 /* --- @ausys_decode@ --- *
  96  *
  97  * Arguments:   @au_sample *s@ = pointer to sample block
  98  *              @const void *p@ = pointer to sample file contents
  99  *              @size_t sz@ = size of sample file contents
 100  *
 101  * Returns:     Pointer to a sample data structure.
 102  *
 103  * Use:         Decodes a WAV file into something the system-specific layer
 104  *              actually wants to deal with.
 105  */
 106
 107 au_data *ausys_decode(au_sample *s, const void *p, size_t sz)
 108 {
 109   au_data *a = CREATE(au_data);
 110   const octet *pp = p;
 111   const octet *qq = memchr(pp, '\n', sz);
 112
 113   if (qq)
 114     sz = qq - pp;
 115   else
 116     sz++;
 117   a->p = xmalloc(sz);
 118   a->sz = sz;
 119   memcpy(a->p, p, sz);
 120   a->p[sz] = 0;
 121   T( trace(T_AUSYS, "ausys: decoded `%s' ok", SYM_NAME(s)); )
 122   return (a);
 123 }
 124
 125 /* --- @ausys_queue@ --- *
 126  *
 127  * Arguments:   @au_data *a@ = an audio thingy to play
 128  *
 129  * Returns:     ---
 130  *
 131  * Use:         Queues an audio sample to be played.  The sample should be
 132  *              freed (with @au_free@) when it's no longer wanted.
 133  */
 134
 135 void ausys_queue(au_data *a)
 136 {
 137   T( trace(T_AUSYS, "ausys: queuing `%s'", SYM_NAME(a->s)); )
 138   printf("[%s]\n", a->p);
 139   au_free(a);
 140 }
 141
 142 /* --- @ausys_free@ --- *
 143  *
 144  * Arguments:   @au_data *a@ = an audio thingy to free
 145  *
 146  * Returns:     ---
 147  *
 148  * Use:         Frees a decoded audio sample.
 149  */
 150
 151 void ausys_free(au_data *a)
 152 {
 153   T( trace(T_AUSYS, "ausys: freeing data for `%s' ok", SYM_NAME(a->s)); )
 154   xfree(a->p);
 155   DESTROY(a);
 156 }
 157
 158 /*----- That's all, folks -------------------------------------------------*/