Opus encoder resamples to 48000:16:2

common/resampler.hpp

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+/***
+    This file is part of snapcast
+    Copyright (C) 2014-2020  Johannes Pohl
+
+    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 3 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, see <http://www.gnu.org/licenses/>.
+***/
+
+#ifndef RESAMPLER_HPP
+#define RESAMPLER_HPP
+
+#include "common/message/pcm_chunk.hpp"
+#include "common/sample_format.hpp"
+#include <deque>
+#include <vector>
+#ifdef HAS_SOXR
+#include <soxr.h>
+#endif
+
+
+class Resampler
+{
+public:
+    Resampler(const SampleFormat& in_format, const SampleFormat& out_format);
+    virtual ~Resampler();
+
+    // std::shared_ptr<msg::PcmChunk> resample(std::shared_ptr<msg::PcmChunk> chunk, chronos::usec duration);
+    std::shared_ptr<msg::PcmChunk> resample(std::shared_ptr<msg::PcmChunk> chunk);
+
+private:
+    std::vector<char> resample_buffer_;
+    // std::unique_ptr<msg::PcmChunk> resampled_chunk_;
+    SampleFormat in_format_;
+    SampleFormat out_format_;
+#ifdef HAS_SOXR
+    soxr_t soxr_;
+#endif
+};
+
+#endif