🛠️🐜 Antkeeper superbuild with dependencies included
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371 lines
13 KiB
371 lines
13 KiB
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#include "config.h"
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#include "converter.h"
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#include <algorithm>
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#include <cmath>
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#include <cstdint>
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#include <iterator>
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#include <limits.h>
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#include "albit.h"
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#include "albyte.h"
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#include "alnumeric.h"
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#include "fpu_ctrl.h"
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struct CTag;
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struct CopyTag;
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namespace {
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constexpr uint MaxPitch{10};
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static_assert((BufferLineSize-1)/MaxPitch > 0, "MaxPitch is too large for BufferLineSize!");
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static_assert((INT_MAX>>MixerFracBits)/MaxPitch > BufferLineSize,
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"MaxPitch and/or BufferLineSize are too large for MixerFracBits!");
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/* Base template left undefined. Should be marked =delete, but Clang 3.8.1
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* chokes on that given the inline specializations.
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*/
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template<DevFmtType T>
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inline float LoadSample(DevFmtType_t<T> val) noexcept;
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template<> inline float LoadSample<DevFmtByte>(DevFmtType_t<DevFmtByte> val) noexcept
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{ return val * (1.0f/128.0f); }
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template<> inline float LoadSample<DevFmtShort>(DevFmtType_t<DevFmtShort> val) noexcept
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{ return val * (1.0f/32768.0f); }
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template<> inline float LoadSample<DevFmtInt>(DevFmtType_t<DevFmtInt> val) noexcept
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{ return static_cast<float>(val) * (1.0f/2147483648.0f); }
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template<> inline float LoadSample<DevFmtFloat>(DevFmtType_t<DevFmtFloat> val) noexcept
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{ return val; }
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template<> inline float LoadSample<DevFmtUByte>(DevFmtType_t<DevFmtUByte> val) noexcept
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{ return LoadSample<DevFmtByte>(static_cast<int8_t>(val - 128)); }
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template<> inline float LoadSample<DevFmtUShort>(DevFmtType_t<DevFmtUShort> val) noexcept
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{ return LoadSample<DevFmtShort>(static_cast<int16_t>(val - 32768)); }
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template<> inline float LoadSample<DevFmtUInt>(DevFmtType_t<DevFmtUInt> val) noexcept
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{ return LoadSample<DevFmtInt>(static_cast<int32_t>(val - 2147483648u)); }
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template<DevFmtType T>
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inline void LoadSampleArray(float *RESTRICT dst, const void *src, const size_t srcstep,
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const size_t samples) noexcept
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{
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const DevFmtType_t<T> *ssrc = static_cast<const DevFmtType_t<T>*>(src);
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for(size_t i{0u};i < samples;i++)
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dst[i] = LoadSample<T>(ssrc[i*srcstep]);
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}
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void LoadSamples(float *dst, const void *src, const size_t srcstep, const DevFmtType srctype,
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const size_t samples) noexcept
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{
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#define HANDLE_FMT(T) \
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case T: LoadSampleArray<T>(dst, src, srcstep, samples); break
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switch(srctype)
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{
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HANDLE_FMT(DevFmtByte);
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HANDLE_FMT(DevFmtUByte);
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HANDLE_FMT(DevFmtShort);
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HANDLE_FMT(DevFmtUShort);
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HANDLE_FMT(DevFmtInt);
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HANDLE_FMT(DevFmtUInt);
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HANDLE_FMT(DevFmtFloat);
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}
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#undef HANDLE_FMT
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}
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template<DevFmtType T>
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inline DevFmtType_t<T> StoreSample(float) noexcept;
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template<> inline float StoreSample<DevFmtFloat>(float val) noexcept
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{ return val; }
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template<> inline int32_t StoreSample<DevFmtInt>(float val) noexcept
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{ return fastf2i(clampf(val*2147483648.0f, -2147483648.0f, 2147483520.0f)); }
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template<> inline int16_t StoreSample<DevFmtShort>(float val) noexcept
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{ return static_cast<int16_t>(fastf2i(clampf(val*32768.0f, -32768.0f, 32767.0f))); }
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template<> inline int8_t StoreSample<DevFmtByte>(float val) noexcept
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{ return static_cast<int8_t>(fastf2i(clampf(val*128.0f, -128.0f, 127.0f))); }
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/* Define unsigned output variations. */
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template<> inline uint32_t StoreSample<DevFmtUInt>(float val) noexcept
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{ return static_cast<uint32_t>(StoreSample<DevFmtInt>(val)) + 2147483648u; }
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template<> inline uint16_t StoreSample<DevFmtUShort>(float val) noexcept
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{ return static_cast<uint16_t>(StoreSample<DevFmtShort>(val) + 32768); }
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template<> inline uint8_t StoreSample<DevFmtUByte>(float val) noexcept
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{ return static_cast<uint8_t>(StoreSample<DevFmtByte>(val) + 128); }
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template<DevFmtType T>
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inline void StoreSampleArray(void *dst, const float *RESTRICT src, const size_t dststep,
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const size_t samples) noexcept
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{
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DevFmtType_t<T> *sdst = static_cast<DevFmtType_t<T>*>(dst);
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for(size_t i{0u};i < samples;i++)
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sdst[i*dststep] = StoreSample<T>(src[i]);
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}
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void StoreSamples(void *dst, const float *src, const size_t dststep, const DevFmtType dsttype,
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const size_t samples) noexcept
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{
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#define HANDLE_FMT(T) \
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case T: StoreSampleArray<T>(dst, src, dststep, samples); break
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switch(dsttype)
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{
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HANDLE_FMT(DevFmtByte);
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HANDLE_FMT(DevFmtUByte);
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HANDLE_FMT(DevFmtShort);
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HANDLE_FMT(DevFmtUShort);
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HANDLE_FMT(DevFmtInt);
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HANDLE_FMT(DevFmtUInt);
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HANDLE_FMT(DevFmtFloat);
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}
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#undef HANDLE_FMT
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}
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template<DevFmtType T>
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void Mono2Stereo(float *RESTRICT dst, const void *src, const size_t frames) noexcept
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{
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const DevFmtType_t<T> *ssrc = static_cast<const DevFmtType_t<T>*>(src);
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for(size_t i{0u};i < frames;i++)
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dst[i*2 + 1] = dst[i*2 + 0] = LoadSample<T>(ssrc[i]) * 0.707106781187f;
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}
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template<DevFmtType T>
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void Multi2Mono(uint chanmask, const size_t step, const float scale, float *RESTRICT dst,
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const void *src, const size_t frames) noexcept
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{
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const DevFmtType_t<T> *ssrc = static_cast<const DevFmtType_t<T>*>(src);
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std::fill_n(dst, frames, 0.0f);
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for(size_t c{0};chanmask;++c)
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{
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if LIKELY((chanmask&1))
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{
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for(size_t i{0u};i < frames;i++)
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dst[i] += LoadSample<T>(ssrc[i*step + c]);
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}
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chanmask >>= 1;
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}
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for(size_t i{0u};i < frames;i++)
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dst[i] *= scale;
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}
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} // namespace
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SampleConverterPtr CreateSampleConverter(DevFmtType srcType, DevFmtType dstType, size_t numchans,
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uint srcRate, uint dstRate, Resampler resampler)
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{
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if(numchans < 1 || srcRate < 1 || dstRate < 1)
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return nullptr;
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SampleConverterPtr converter{new(FamCount(numchans)) SampleConverter{numchans}};
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converter->mSrcType = srcType;
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converter->mDstType = dstType;
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converter->mSrcTypeSize = BytesFromDevFmt(srcType);
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converter->mDstTypeSize = BytesFromDevFmt(dstType);
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converter->mSrcPrepCount = 0;
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converter->mFracOffset = 0;
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/* Have to set the mixer FPU mode since that's what the resampler code expects. */
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FPUCtl mixer_mode{};
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auto step = static_cast<uint>(
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mind(srcRate*double{MixerFracOne}/dstRate + 0.5, MaxPitch*MixerFracOne));
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converter->mIncrement = maxu(step, 1);
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if(converter->mIncrement == MixerFracOne)
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converter->mResample = Resample_<CopyTag,CTag>;
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else
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converter->mResample = PrepareResampler(resampler, converter->mIncrement,
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&converter->mState);
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return converter;
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}
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uint SampleConverter::availableOut(uint srcframes) const
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{
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int prepcount{mSrcPrepCount};
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if(prepcount < 0)
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{
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/* Negative prepcount means we need to skip that many input samples. */
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if(static_cast<uint>(-prepcount) >= srcframes)
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return 0;
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srcframes -= static_cast<uint>(-prepcount);
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prepcount = 0;
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}
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if(srcframes < 1)
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{
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/* No output samples if there's no input samples. */
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return 0;
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}
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if(prepcount < MaxResamplerPadding
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&& static_cast<uint>(MaxResamplerPadding - prepcount) >= srcframes)
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{
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/* Not enough input samples to generate an output sample. */
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return 0;
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}
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auto DataSize64 = static_cast<uint64_t>(prepcount);
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DataSize64 += srcframes;
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DataSize64 -= MaxResamplerPadding;
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DataSize64 <<= MixerFracBits;
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DataSize64 -= mFracOffset;
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/* If we have a full prep, we can generate at least one sample. */
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return static_cast<uint>(clampu64((DataSize64 + mIncrement-1)/mIncrement, 1,
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std::numeric_limits<int>::max()));
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}
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uint SampleConverter::convert(const void **src, uint *srcframes, void *dst, uint dstframes)
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{
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const uint SrcFrameSize{static_cast<uint>(mChan.size()) * mSrcTypeSize};
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const uint DstFrameSize{static_cast<uint>(mChan.size()) * mDstTypeSize};
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const uint increment{mIncrement};
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auto SamplesIn = static_cast<const al::byte*>(*src);
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uint NumSrcSamples{*srcframes};
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FPUCtl mixer_mode{};
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uint pos{0};
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while(pos < dstframes && NumSrcSamples > 0)
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{
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int prepcount{mSrcPrepCount};
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if(prepcount < 0)
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{
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/* Negative prepcount means we need to skip that many input samples. */
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if(static_cast<uint>(-prepcount) >= NumSrcSamples)
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{
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mSrcPrepCount = static_cast<int>(NumSrcSamples) + prepcount;
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NumSrcSamples = 0;
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break;
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}
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SamplesIn += SrcFrameSize*static_cast<uint>(-prepcount);
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NumSrcSamples -= static_cast<uint>(-prepcount);
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mSrcPrepCount = 0;
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continue;
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}
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const uint toread{minu(NumSrcSamples, BufferLineSize - MaxResamplerPadding)};
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if(prepcount < MaxResamplerPadding
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&& static_cast<uint>(MaxResamplerPadding - prepcount) >= toread)
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{
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/* Not enough input samples to generate an output sample. Store
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* what we're given for later.
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*/
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for(size_t chan{0u};chan < mChan.size();chan++)
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LoadSamples(&mChan[chan].PrevSamples[prepcount], SamplesIn + mSrcTypeSize*chan,
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mChan.size(), mSrcType, toread);
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mSrcPrepCount = prepcount + static_cast<int>(toread);
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NumSrcSamples = 0;
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break;
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}
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float *RESTRICT SrcData{mSrcSamples};
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float *RESTRICT DstData{mDstSamples};
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uint DataPosFrac{mFracOffset};
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auto DataSize64 = static_cast<uint64_t>(prepcount);
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DataSize64 += toread;
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DataSize64 -= MaxResamplerPadding;
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DataSize64 <<= MixerFracBits;
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DataSize64 -= DataPosFrac;
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/* If we have a full prep, we can generate at least one sample. */
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auto DstSize = static_cast<uint>(
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clampu64((DataSize64 + increment-1)/increment, 1, BufferLineSize));
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DstSize = minu(DstSize, dstframes-pos);
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for(size_t chan{0u};chan < mChan.size();chan++)
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{
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const al::byte *SrcSamples{SamplesIn + mSrcTypeSize*chan};
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al::byte *DstSamples = static_cast<al::byte*>(dst) + mDstTypeSize*chan;
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/* Load the previous samples into the source data first, then the
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* new samples from the input buffer.
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*/
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std::copy_n(mChan[chan].PrevSamples, prepcount, SrcData);
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LoadSamples(SrcData + prepcount, SrcSamples, mChan.size(), mSrcType, toread);
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/* Store as many prep samples for next time as possible, given the
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* number of output samples being generated.
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*/
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uint SrcDataEnd{(DstSize*increment + DataPosFrac)>>MixerFracBits};
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if(SrcDataEnd >= static_cast<uint>(prepcount)+toread)
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std::fill(std::begin(mChan[chan].PrevSamples),
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std::end(mChan[chan].PrevSamples), 0.0f);
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else
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{
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const size_t len{minz(al::size(mChan[chan].PrevSamples),
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static_cast<uint>(prepcount)+toread-SrcDataEnd)};
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std::copy_n(SrcData+SrcDataEnd, len, mChan[chan].PrevSamples);
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std::fill(std::begin(mChan[chan].PrevSamples)+len,
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std::end(mChan[chan].PrevSamples), 0.0f);
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}
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/* Now resample, and store the result in the output buffer. */
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const float *ResampledData{mResample(&mState, SrcData+(MaxResamplerPadding>>1),
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DataPosFrac, increment, {DstData, DstSize})};
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StoreSamples(DstSamples, ResampledData, mChan.size(), mDstType, DstSize);
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}
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/* Update the number of prep samples still available, as well as the
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* fractional offset.
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*/
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DataPosFrac += increment*DstSize;
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mSrcPrepCount = mini(prepcount + static_cast<int>(toread - (DataPosFrac>>MixerFracBits)),
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MaxResamplerPadding);
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mFracOffset = DataPosFrac & MixerFracMask;
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/* Update the src and dst pointers in case there's still more to do. */
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SamplesIn += SrcFrameSize*(DataPosFrac>>MixerFracBits);
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NumSrcSamples -= minu(NumSrcSamples, (DataPosFrac>>MixerFracBits));
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dst = static_cast<al::byte*>(dst) + DstFrameSize*DstSize;
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pos += DstSize;
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}
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*src = SamplesIn;
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*srcframes = NumSrcSamples;
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return pos;
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}
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void ChannelConverter::convert(const void *src, float *dst, uint frames) const
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{
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if(mDstChans == DevFmtMono)
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{
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const float scale{std::sqrt(1.0f / static_cast<float>(al::popcount(mChanMask)))};
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switch(mSrcType)
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{
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#define HANDLE_FMT(T) case T: Multi2Mono<T>(mChanMask, mSrcStep, scale, dst, src, frames); break
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HANDLE_FMT(DevFmtByte);
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HANDLE_FMT(DevFmtUByte);
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HANDLE_FMT(DevFmtShort);
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HANDLE_FMT(DevFmtUShort);
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HANDLE_FMT(DevFmtInt);
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HANDLE_FMT(DevFmtUInt);
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HANDLE_FMT(DevFmtFloat);
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#undef HANDLE_FMT
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}
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}
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else if(mChanMask == 0x1 && mDstChans == DevFmtStereo)
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{
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switch(mSrcType)
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{
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#define HANDLE_FMT(T) case T: Mono2Stereo<T>(dst, src, frames); break
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HANDLE_FMT(DevFmtByte);
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HANDLE_FMT(DevFmtUByte);
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HANDLE_FMT(DevFmtShort);
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HANDLE_FMT(DevFmtUShort);
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HANDLE_FMT(DevFmtInt);
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HANDLE_FMT(DevFmtUInt);
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HANDLE_FMT(DevFmtFloat);
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#undef HANDLE_FMT
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}
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}
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}
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