A dummy deck for testing

Makefile

@@ -50,6 +50,7 @@ OBJS = controller.o \
 	cues.o \
 	deck.o \
 	device.o \
+	dummy.o \
 	excrate.o \
 	external.o \
 	index.o \

dummy.c

+/*
+ * Copyright (C) 2014 Mark Hills <mark@xwax.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program 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 version 2 for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; if not, write to the Free
+ * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ *
+ */
+
+#include "dummy.h"
+
+static unsigned int sample_rate(struct device *d)
+{
+    return 48000;
+}
+
+static struct device_ops dummy_ops = {
+    .sample_rate = sample_rate,
+};
+
+void dummy_init(struct device *d)
+{
+    device_init(d, &dummy_ops);
+}

dummy.h

+/*
+ * Copyright (C) 2014 Mark Hills <mark@xwax.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program 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 version 2 for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; if not, write to the Free
+ * Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ *
+ */
+
+#ifndef DUMMY_H
+#define DUMMY_H
+
+#include "device.h"
+
+void dummy_init(struct device *d);
+
+#endif

xwax.1

@@ -79,6 +79,11 @@ Use the given importer executable for subsequent decks.
 .B \-s \fIpath\fR
 Use the given scanner executable to scan subsequent music libraries.
 
+.TP
+.B \-\-dummy
+Create a deck which is not connected to any audio device, used
+for testing.
+
 .TP
 .B \-k
 Lock into RAM any memory required for real-time use.

xwax.c

@@ -30,6 +30,7 @@
 #include "controller.h"
 #include "device.h"
 #include "dicer.h"
+#include "dummy.h"
 #include "interface.h"
 #include "jack.h"
 #include "library.h"
@@ -95,7 +96,8 @@ static void usage(FILE *fd)
       "  -u             Allow all operations when playing\n"
       "  --line         Line level signal (default)\n"
       "  --phono        Tolerate cartridge level signal ('software pre-amp')\n"
-      "  -i <program>   Importer (default '%s')\n\n",
+      "  -i <program>   Importer (default '%s')\n"
+      "  --dummy        Build a dummy deck with no audio device\n\n",
       DEFAULT_IMPORTER);
 
 #ifdef WITH_OSS
@@ -383,6 +385,20 @@ int main(int argc, char *argv[])
             argv += 2;
             argc -= 2;
 
+        } else if (!strcmp(argv[0], "--dummy")) {
+
+            struct device *v;
+
+            v = start_deck("dummy");
+            if (v == NULL)
+                return -1;
+
+            dummy_init(v);
+            commit_deck();
+
+            argv++;
+            argc--;
+
         } else if (!strcmp(argv[0], "-t")) {
 
             /* Set the timecode definition to use */