audio_check: checker functions for audio_format attributes

These functions are a wrapper for audio_valid_X().  On error, they
return a GError object.

1 files changed, 74 insertions, 0 deletions

diff --git a/src/audio_check.c b/src/audio_check.c
new file mode 100644
index 000000000..4046e8862
--- /dev/null
+++ b/src/audio_check.c
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2003-2009 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program 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.
+ *
+ * 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 for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "audio_check.h"
+#include "audio_format.h"
+
+#include <assert.h>
+
+bool
+audio_check_sample_rate(unsigned long sample_rate, GError **error_r)
+{
+	if (!audio_valid_sample_rate(sample_rate)) {
+		g_set_error(error_r, audio_format_quark(), 0,
+			    "Invalid sample rate: %lu", sample_rate);
+		return false;
+	}
+
+	return true;
+}
+
+bool
+audio_check_sample_format(unsigned sample_format, GError **error_r)
+{
+	if (!audio_valid_sample_format(sample_format)) {
+		g_set_error(error_r, audio_format_quark(), 0,
+			    "Invalid sample format: %u", sample_format);
+		return false;
+	}
+
+	return true;
+}
+
+bool
+audio_check_channel_count(unsigned channels, GError **error_r)
+{
+	if (!audio_valid_channel_count(channels)) {
+		g_set_error(error_r, audio_format_quark(), 0,
+			    "Invalid channel count: %u", channels);
+		return false;
+	}
+
+	return true;
+}
+
+bool
+audio_format_init_checked(struct audio_format *af, unsigned long sample_rate,
+			  unsigned sample_format, unsigned channels,
+			  GError **error_r)
+{
+	if (audio_check_sample_rate(sample_rate, error_r) &&
+	    audio_check_sample_format(sample_format, error_r) &&
+	    audio_check_channel_count(channels, error_r)) {
+		audio_format_init(af, sample_rate, sample_format, channels);
+		assert(audio_format_valid(af));
+		return true;
+	} else
+		return false;
+}