diff options
Diffstat (limited to 'libao/src/src/ao_null.c')
| -rw-r--r-- | libao/src/src/ao_null.c | 153 |
1 files changed, 153 insertions, 0 deletions
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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