1 files changed, 70 insertions, 0 deletions
diff --git a/alc/converter.h b/alc/converter.h
new file mode 100644
index 00000000..033e4d3f
--- /dev/null
+++ b/alc/converter.h
@@ -0,0 +1,70 @@
+#ifndef CONVERTER_H
+#define CONVERTER_H
+
+#include <memory>
+
+#include "alcmain.h"
+#include "alu.h"
+#include "almalloc.h"
+
+struct SampleConverter {
+    DevFmtType mSrcType{};
+    DevFmtType mDstType{};
+    ALsizei mSrcTypeSize{};
+    ALsizei mDstTypeSize{};
+
+    ALint mSrcPrepCount{};
+
+    ALsizei mFracOffset{};
+    ALsizei mIncrement{};
+    InterpState mState{};
+    ResamplerFunc mResample{};
+
+    alignas(16) ALfloat mSrcSamples[BUFFERSIZE]{};
+    alignas(16) ALfloat mDstSamples[BUFFERSIZE]{};
+
+    struct ChanSamples {
+        alignas(16) ALfloat PrevSamples[MAX_RESAMPLE_PADDING*2];
+    };
+    al::FlexArray<ChanSamples> mChan;
+
+    SampleConverter(size_t numchans) : mChan{numchans} { }
+    SampleConverter(const SampleConverter&) = delete;
+    SampleConverter& operator=(const SampleConverter&) = delete;
+
+    ALsizei convert(const ALvoid **src, ALsizei *srcframes, ALvoid *dst, ALsizei dstframes);
+    ALsizei availableOut(ALsizei srcframes) const;
+
+    static constexpr size_t Sizeof(size_t length) noexcept
+    {
+        return maxz(sizeof(SampleConverter),
+            al::FlexArray<ChanSamples>::Sizeof(length, offsetof(SampleConverter, mChan)));
+    }
+
+    DEF_PLACE_NEWDEL()
+};
+using SampleConverterPtr = std::unique_ptr<SampleConverter>;
+
+SampleConverterPtr CreateSampleConverter(DevFmtType srcType, DevFmtType dstType, ALsizei numchans,
+    ALsizei srcRate, ALsizei dstRate, Resampler resampler);
+
+
+struct ChannelConverter {
+    DevFmtType mSrcType;
+    DevFmtChannels mSrcChans;
+    DevFmtChannels mDstChans;
+
+    ChannelConverter(DevFmtType srctype, DevFmtChannels srcchans, DevFmtChannels dstchans)
+      : mSrcType(srctype), mSrcChans(srcchans), mDstChans(dstchans)
+    { }
+
+    void convert(const ALvoid *src, ALfloat *dst, ALsizei frames) const;
+
+    DEF_NEWDEL(ChannelConverter)
+};
+using ChannelConverterPtr = std::unique_ptr<ChannelConverter>;
+
+ChannelConverterPtr CreateChannelConverter(DevFmtType srcType, DevFmtChannels srcChans,
+    DevFmtChannels dstChans);
+
+#endif /* CONVERTER_H */