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