New audio subsystem.

[jog] / ausys-fake.c

diff --git a/ausys-fake.c b/ausys-fake.c
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+/* -*-c-*-
+ *
+ * $Id: ausys-fake.c,v 1.1 2002/02/02 19:16:28 mdw Exp $
+ *
+ * Fake not-audio-at-all audio driver
+ *
+ * (c) 2002 Mark Wooding
+ */
+
+/*----- Licensing notice --------------------------------------------------* 
+ *
+ * This file is part of Jog: Programming for a jogging machine.
+ *
+ * Jog 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.
+ * 
+ * Jog 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 Jog; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+/*----- Revision history --------------------------------------------------* 
+ *
+ * $Log: ausys-fake.c,v $
+ * Revision 1.1  2002/02/02 19:16:28  mdw
+ * New audio subsystem.
+ *
+ */
+
+/*----- Header files ------------------------------------------------------*/
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include <stdio.h>
+#include <string.h>
+
+#include <mLib/alloc.h>
+#include <mLib/sub.h>
+#include <mLib/trace.h>
+
+#include "au.h"
+#include "ausys.h"
+#include "jog.h"
+
+/*----- Global variables --------------------------------------------------*/
+
+const char *const ausys_suffix = "txt";
+
+/*----- Main code ---------------------------------------------------------*/
+
+/* --- @ausys_init@ --- *
+ *
+ * Arguments:  ---
+ *
+ * Returns:    ---
+ *
+ * Use:                Does any initialization required by the system-specific audio
+ *             handler.
+ */
+
+void ausys_init(void)
+{
+  T( trace(T_AUSYS, "ausys: initalized ok"); )
+}
+
+/* --- @ausys_shutdown@ --- *
+ *
+ * Arguments:  ---
+ *
+ * Returns:    ---
+ *
+ * Use:                Does any tidying up required.
+ */
+
+void ausys_shutdown(void)
+{
+  T( trace(T_AUSYS, "ausys: shut down ok"); )
+}
+
+/* --- @ausys_lock@, @ausys_unlock@ --- *
+ *
+ * Arguments:  ---
+ *
+ * Returns:    ---
+ *
+ * Use:                Locks or unlocks the audio subsystem.  This protects the
+ *             audio queue from becoming corrupted during all the tedious
+ *             asynchronous stuff.
+ */
+
+void ausys_lock(void) { T( trace(T_AUSYS, "ausys: acquired lock"); ) ; }
+void ausys_unlock(void) { T( trace(T_AUSYS, "ausys: released lock"); ) ; }
+
+/* --- @ausys_decode@ --- *
+ *
+ * Arguments:  @au_sample *s@ = pointer to sample block
+ *             @const void *p@ = pointer to sample file contents
+ *             @size_t sz@ = size of sample file contents
+ *
+ * Returns:    Pointer to a sample data structure.
+ *
+ * Use:                Decodes a WAV file into something the system-specific layer
+ *             actually wants to deal with.
+ */
+
+au_data *ausys_decode(au_sample *s, const void *p, size_t sz)
+{
+  au_data *a = CREATE(au_data);
+  const octet *pp = p;
+  const octet *qq = memchr(pp, '\n', sz);
+
+  if (qq)
+    sz = qq - pp;
+  else
+    sz++;
+  a->p = xmalloc(sz);
+  a->sz = sz;
+  memcpy(a->p, p, sz);
+  a->p[sz] = 0;
+  T( trace(T_AUSYS, "ausys: decoded `%s' ok", SYM_NAME(s)); )
+  return (a);
+}
+
+/* --- @ausys_queue@ --- *
+ *
+ * Arguments:  @au_data *a@ = an audio thingy to play
+ *
+ * Returns:    ---
+ *
+ * Use:                Queues an audio sample to be played.  The sample should be
+ *             freed (with @au_free@) when it's no longer wanted.
+ */
+
+void ausys_queue(au_data *a)
+{
+  T( trace(T_AUSYS, "ausys: queuing `%s'", SYM_NAME(a->s)); )
+  printf("[%s]\n", a->p);
+  au_free(a);
+}
+
+/* --- @ausys_free@ --- *
+ *
+ * Arguments:  @au_data *a@ = an audio thingy to free
+ *
+ * Returns:    ---
+ *
+ * Use:                Frees a decoded audio sample.
+ */
+
+void ausys_free(au_data *a)
+{
+  T( trace(T_AUSYS, "ausys: freeing data for `%s' ok", SYM_NAME(a->s)); )
+  xfree(a->p);
+  DESTROY(a);
+}
+
+/*----- That's all, folks -------------------------------------------------*/