pcm/PcmResampler: convert to abstract interface

The PcmResampler interface is implemented by the two classes
FallbackPcmResampler and LibsampleratePcmResampler.  This prepares for
adding more resampler libraries.

1 files changed, 63 insertions, 0 deletions

diff --git a/src/pcm/ConfiguredResampler.cxx b/src/pcm/ConfiguredResampler.cxx
new file mode 100644
index 000000000..92f3d0903
--- /dev/null
+++ b/src/pcm/ConfiguredResampler.cxx
@@ -0,0 +1,63 @@
+/*
+ * 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 "config.h"
+#include "ConfiguredResampler.hxx"
+#include "FallbackResampler.hxx"
+
+#ifdef HAVE_LIBSAMPLERATE
+#include "LibsamplerateResampler.hxx"
+#include "ConfigGlobal.hxx"
+#include "ConfigOption.hxx"
+#endif
+
+#include <string.h>
+
+#ifdef HAVE_LIBSAMPLERATE
+static bool lsr_enabled;
+#endif
+
+bool
+pcm_resampler_global_init(Error &error)
+{
+#ifdef HAVE_LIBSAMPLERATE
+	const char *converter =
+		config_get_string(CONF_SAMPLERATE_CONVERTER, "");
+
+	lsr_enabled = strcmp(converter, "internal") != 0;
+	if (lsr_enabled)
+		return pcm_resample_lsr_global_init(converter, error);
+	else
+		return true;
+#else
+	(void)error;
+	return true;
+#endif
+}
+
+PcmResampler *
+pcm_resampler_create()
+{
+#ifdef HAVE_LIBSAMPLERATE
+	if (lsr_enabled)
+		return new LibsampleratePcmResampler();
+#endif
+
+	return new FallbackPcmResampler();
+}