audio_format: convert to C++

src/AudioFormat.cxx

@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2003-2013 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 "AudioFormat.hxx"
+
+#include <assert.h>
+#include <stdio.h>
+
+void
+AudioFormat::ApplyMask(AudioFormat mask)
+{
+	assert(IsValid());
+	assert(mask.IsMaskValid());
+
+	if (mask.sample_rate != 0)
+		sample_rate = mask.sample_rate;
+
+	if (mask.format != SampleFormat::UNDEFINED)
+		format = mask.format;
+
+	if (mask.channels != 0)
+		channels = mask.channels;
+
+	assert(IsValid());
+}
+
+const char *
+sample_format_to_string(SampleFormat format)
+{
+	switch (format) {
+	case SampleFormat::UNDEFINED:
+		return "?";
+
+	case SampleFormat::S8:
+		return "8";
+
+	case SampleFormat::S16:
+		return "16";
+
+	case SampleFormat::S24_P32:
+		return "24";
+
+	case SampleFormat::S32:
+		return "32";
+
+	case SampleFormat::FLOAT:
+		return "f";
+
+	case SampleFormat::DSD:
+		return "dsd";
+	}
+
+	/* unreachable */
+	assert(false);
+	gcc_unreachable();
+}
+
+const char *
+audio_format_to_string(const AudioFormat af,
+		       struct audio_format_string *s)
+{
+	assert(s != nullptr);
+
+	snprintf(s->buffer, sizeof(s->buffer), "%u:%s:%u",
+		 af.sample_rate, sample_format_to_string(af.format),
+		 af.channels);
+
+	return s->buffer;
+}