From 2ab3d99967d68c79351fe2a3df22c445447e3010 Mon Sep 17 00:00:00 2001
From: Michał Cichoń <michcic@gmail.com>
Date: Tue, 15 Nov 2011 22:28:48 +0100
Subject: Initial import.

---
 libao/src/src/ao_null.c | 153 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 153 insertions(+)
 create mode 100644 libao/src/src/ao_null.c

(limited to 'libao/src/src/ao_null.c')

diff --git a/libao/src/src/ao_null.c b/libao/src/src/ao_null.c
new file mode 100644
index 0000000..cd7271d
--- /dev/null
+++ b/libao/src/src/ao_null.c
@@ -0,0 +1,153 @@
+/*
+ *
+ *  ao_null.c
+ *
+ *      Original Copyright (C) Aaron Holtzman - May 1999
+ *      Modifications Copyright (C) Stan Seibert - July 2000, July 2001
+ *
+ *  This file is part of libao, a cross-platform audio output library.  See
+ *  README for a history of this source code.
+ *
+ *  libao 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, or (at your option)
+ *  any later version.
+ *
+ *  libao 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 GNU Make; see the file COPYING.  If not, write to
+ *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ ********************************************************************
+
+ last mod: $Id: ao_null.c 17718 2010-12-06 20:09:29Z xiphmont $
+
+ ********************************************************************/
+
+#include <stdio.h>
+#include <string.h>
+#include <ao/ao.h>
+
+static char *ao_null_options[] = {
+  "debug","verbose","matrix","quiet"
+};
+static ao_info ao_null_info = {
+	AO_TYPE_LIVE,
+	"Null output",
+	"null",
+	"Stan Seibert <volsung@asu.edu>",
+	"This driver does nothing.",
+	AO_FMT_NATIVE,
+	0,
+	ao_null_options,
+        sizeof(ao_null_options)/sizeof(*ao_null_options)
+};
+
+
+typedef struct ao_null_internal {
+	unsigned long byte_counter;
+} ao_null_internal;
+
+
+static int ao_null_test(void)
+{
+	return 1; /* Null always works */
+}
+
+
+static ao_info *ao_null_driver_info(void)
+{
+	return &ao_null_info;
+}
+
+
+static int ao_null_device_init(ao_device *device)
+{
+	ao_null_internal *internal;
+
+	internal = (ao_null_internal *) malloc(sizeof(ao_null_internal));
+
+	if (internal == NULL)
+		return 0; /* Could not initialize device memory */
+
+	internal->byte_counter = 0;
+
+	device->internal = internal;
+        device->output_matrix_order = AO_OUTPUT_MATRIX_FIXED;
+
+	return 1; /* Memory alloc successful */
+}
+
+
+static int ao_null_set_option(ao_device *device, const char *key,
+			      const char *value)
+{
+	/*ao_null_internal *internal = (ao_null_internal *) device->internal;*/
+	(void)value;
+	(void)key;
+	(void)device;
+
+	return 1;
+}
+
+
+
+static int ao_null_open(ao_device *device, ao_sample_format *format)
+{
+	/* Use whatever format the client requested */
+	device->driver_byte_format = device->client_byte_format;
+
+        if(!device->inter_matrix){
+          /* by default, we want inter == in */
+          if(format->matrix)
+            device->inter_matrix = _strdup(format->matrix);
+        }
+
+	return 1;
+}
+
+
+static int ao_null_play(ao_device *device, const char *output_samples,
+			uint_32 num_bytes)
+{
+	ao_null_internal *internal = (ao_null_internal *)device->internal;
+
+	internal->byte_counter += num_bytes;
+
+	return 1;
+}
+
+
+static int ao_null_close(ao_device *device)
+{
+	ao_null_internal *internal = (ao_null_internal *) device->internal;
+
+	adebug("%ld bytes sent to null device.\n", internal->byte_counter);
+
+	return 1;
+}
+
+
+static void ao_null_device_clear(ao_device *device)
+{
+	ao_null_internal *internal = (ao_null_internal *) device->internal;
+
+	free(internal);
+        device->internal=NULL;
+}
+
+
+ao_functions ao_null = {
+	ao_null_test,
+	ao_null_driver_info,
+	ao_null_device_init,
+	ao_null_set_option,
+	ao_null_open,
+	ao_null_play,
+	ao_null_close,
+	ao_null_device_clear
+};
-- 
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