First Commit

externals/openal-soft/core/converter.h

@@ -0,0 +1,66 @@
+#ifndef CORE_CONVERTER_H
+#define CORE_CONVERTER_H
+
+#include <chrono>
+#include <cstddef>
+#include <memory>
+
+#include "almalloc.h"
+#include "devformat.h"
+#include "mixer/defs.h"
+
+using uint = unsigned int;
+
+
+struct SampleConverter {
+    DevFmtType mSrcType{};
+    DevFmtType mDstType{};
+    uint mSrcTypeSize{};
+    uint mDstTypeSize{};
+
+    uint mSrcPrepCount{};
+
+    uint mFracOffset{};
+    uint mIncrement{};
+    InterpState mState{};
+    ResamplerFunc mResample{};
+
+    alignas(16) float mSrcSamples[BufferLineSize]{};
+    alignas(16) float mDstSamples[BufferLineSize]{};
+
+    struct ChanSamples {
+        alignas(16) float PrevSamples[MaxResamplerPadding];
+    };
+    al::FlexArray<ChanSamples> mChan;
+
+    SampleConverter(size_t numchans) : mChan{numchans} { }
+
+    uint convert(const void **src, uint *srcframes, void *dst, uint dstframes);
+    uint availableOut(uint srcframes) const;
+
+    using SampleOffset = std::chrono::duration<int64_t, std::ratio<1,MixerFracOne>>;
+    SampleOffset currentInputDelay() const noexcept
+    {
+        const int64_t prep{int64_t{mSrcPrepCount} - MaxResamplerEdge};
+        return SampleOffset{(prep<<MixerFracBits) + mFracOffset};
+    }
+
+    static std::unique_ptr<SampleConverter> Create(DevFmtType srcType, DevFmtType dstType,
+        size_t numchans, uint srcRate, uint dstRate, Resampler resampler);
+
+    DEF_FAM_NEWDEL(SampleConverter, mChan)
+};
+using SampleConverterPtr = std::unique_ptr<SampleConverter>;
+
+struct ChannelConverter {
+    DevFmtType mSrcType{};
+    uint mSrcStep{};
+    uint mChanMask{};
+    DevFmtChannels mDstChans{};
+
+    bool is_active() const noexcept { return mChanMask != 0; }
+
+    void convert(const void *src, float *dst, uint frames) const;
+};
+
+#endif /* CORE_CONVERTER_H */