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-rw-r--r--src/pcm/FormatConverter.cxx103
1 files changed, 103 insertions, 0 deletions
diff --git a/src/pcm/FormatConverter.cxx b/src/pcm/FormatConverter.cxx
new file mode 100644
index 000000000..b058b32f5
--- /dev/null
+++ b/src/pcm/FormatConverter.cxx
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2003-2014 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 "FormatConverter.hxx"
+#include "PcmFormat.hxx"
+#include "Domain.hxx"
+#include "util/ConstBuffer.hxx"
+#include "util/Error.hxx"
+
+#include <assert.h>
+
+bool
+PcmFormatConverter::Open(SampleFormat _src_format, SampleFormat _dest_format,
+ Error &error)
+{
+ assert(_src_format != SampleFormat::UNDEFINED);
+ assert(_dest_format != SampleFormat::UNDEFINED);
+
+ switch (_dest_format) {
+ case SampleFormat::UNDEFINED:
+ assert(false);
+ gcc_unreachable();
+
+ case SampleFormat::S8:
+ case SampleFormat::DSD:
+ error.Format(pcm_domain,
+ "PCM conversion from %s to %s is not implemented",
+ sample_format_to_string(_src_format),
+ sample_format_to_string(_dest_format));
+ return nullptr;
+
+ case SampleFormat::S16:
+ case SampleFormat::S24_P32:
+ case SampleFormat::S32:
+ case SampleFormat::FLOAT:
+ break;
+ }
+
+ src_format = _src_format;
+ dest_format = _dest_format;
+ return true;
+}
+
+void
+PcmFormatConverter::Close()
+{
+#ifndef NDEBUG
+ src_format = SampleFormat::UNDEFINED;
+ dest_format = SampleFormat::UNDEFINED;
+#endif
+}
+
+ConstBuffer<void>
+PcmFormatConverter::Convert(ConstBuffer<void> src, gcc_unused Error &error)
+{
+ switch (dest_format) {
+ case SampleFormat::UNDEFINED:
+ case SampleFormat::S8:
+ case SampleFormat::DSD:
+ assert(false);
+ gcc_unreachable();
+
+ case SampleFormat::S16:
+ return pcm_convert_to_16(buffer, dither,
+ src_format,
+ src).ToVoid();
+
+ case SampleFormat::S24_P32:
+ return pcm_convert_to_24(buffer,
+ src_format,
+ src).ToVoid();
+
+ case SampleFormat::S32:
+ return pcm_convert_to_32(buffer,
+ src_format,
+ src).ToVoid();
+
+ case SampleFormat::FLOAT:
+ return pcm_convert_to_float(buffer,
+ src_format,
+ src).ToVoid();
+ }
+
+ assert(false);
+ gcc_unreachable();
+}