1 files changed, 45 insertions, 0 deletions
diff --git a/src/3rdparty/resonance-audio/resonance_audio/dsp/channel_converter.cc b/src/3rdparty/resonance-audio/resonance_audio/dsp/channel_converter.cc
new file mode 100644
index 000000000..375001bac
--- /dev/null
+++ b/src/3rdparty/resonance-audio/resonance_audio/dsp/channel_converter.cc
@@ -0,0 +1,45 @@
+/*
+Copyright 2018 Google Inc. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS-IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+#include "dsp/channel_converter.h"
+
+#include <cmath>
+
+#include "base/constants_and_types.h"
+#include "base/logging.h"
+#include "base/simd_utils.h"
+
+namespace vraudio {
+
+void ConvertStereoFromMono(const AudioBuffer& input, AudioBuffer* output) {
+  DCHECK(output);
+  DCHECK_EQ(input.num_channels(), kNumMonoChannels);
+  DCHECK_EQ(output->num_channels(), kNumStereoChannels);
+  DCHECK_EQ(input.num_frames(), output->num_frames());
+  StereoFromMonoSimd(input.num_frames(), &input[0][0], &(*output)[0][0],
+                     &(*output)[1][0]);
+}
+
+void ConvertMonoFromStereo(const AudioBuffer& input, AudioBuffer* output) {
+  DCHECK(output);
+  DCHECK_EQ(input.num_channels(), kNumStereoChannels);
+  DCHECK_EQ(output->num_channels(), kNumMonoChannels);
+  DCHECK_EQ(input.num_frames(), output->num_frames());
+  MonoFromStereoSimd(input.num_frames(), &input[0][0], &input[1][0],
+                     &(*output)[0][0]);
+}
+
+}  // namespace vraudio