refactor: Rename BlackSound to swift::sound

src/sound/codecs/opusdecoder.cpp

@@ -0,0 +1,45 @@
+// SPDX-FileCopyrightText: Copyright (C) 2019 swift Project Community / Contributors
+// SPDX-License-Identifier: GPL-3.0-or-later OR LicenseRef-swift-pilot-client-1
+
+#include "opusdecoder.h"
+
+namespace swift::sound::codecs
+{
+    COpusDecoder::COpusDecoder(int sampleRate, int channels) : m_channels(channels)
+    {
+        int error;
+        m_opusDecoder = opus_decoder_create(sampleRate, channels, &error);
+    }
+
+    COpusDecoder::~COpusDecoder()
+    {
+        opus_decoder_destroy(m_opusDecoder);
+    }
+
+    int COpusDecoder::frameCount(int bufferSize)
+    {
+        //  seems like bitrate should be required
+        int bitrate = 16;
+        int bytesPerSample = (bitrate / 8) * m_channels;
+        return bufferSize / bytesPerSample;
+    }
+
+    QVector<qint16> COpusDecoder::decode(const QByteArray &opusData, int dataLength, int *decodedLength)
+    {
+        QVector<qint16> decoded(MaxDataBytes, 0);
+        int count = frameCount(MaxDataBytes);
+
+        if (!opusData.isEmpty())
+        {
+            *decodedLength = opus_decode(m_opusDecoder, reinterpret_cast<const unsigned char *>(opusData.data()), dataLength, decoded.data(), count, 0);
+        }
+        decoded.resize(*decodedLength);
+        return decoded;
+    }
+
+    void COpusDecoder::resetState()
+    {
+        if (!m_opusDecoder) { return; }
+        opus_decoder_ctl(m_opusDecoder, OPUS_RESET_STATE);
+    }
+} // ns