1 #ifndef CORE_FMT_TRAITS_H
2 #define CORE_FMT_TRAITS_H
8 #include "buffer_storage.h"
13 extern const int16_t muLawDecompressionTable[256];
14 extern const int16_t aLawDecompressionTable[256];
18 struct FmtTypeTraits { };
21 struct FmtTypeTraits<FmtUByte> {
24 template<typename OutT>
25 static constexpr inline OutT to(const Type val) noexcept
26 { return val*OutT{1.0/128.0} - OutT{1.0}; }
29 struct FmtTypeTraits<FmtShort> {
32 template<typename OutT>
33 static constexpr inline OutT to(const Type val) noexcept { return val*OutT{1.0/32768.0}; }
36 struct FmtTypeTraits<FmtFloat> {
39 template<typename OutT>
40 static constexpr inline OutT to(const Type val) noexcept { return val; }
43 struct FmtTypeTraits<FmtDouble> {
46 template<typename OutT>
47 static constexpr inline OutT to(const Type val) noexcept { return static_cast<OutT>(val); }
50 struct FmtTypeTraits<FmtMulaw> {
53 template<typename OutT>
54 static constexpr inline OutT to(const Type val) noexcept
55 { return muLawDecompressionTable[val] * OutT{1.0/32768.0}; }
58 struct FmtTypeTraits<FmtAlaw> {
61 template<typename OutT>
62 static constexpr inline OutT to(const Type val) noexcept
63 { return aLawDecompressionTable[val] * OutT{1.0/32768.0}; }
67 template<FmtType SrcType, typename DstT>
68 inline void LoadSampleArray(DstT *RESTRICT dst, const al::byte *src, const size_t srcstep,
69 const size_t samples) noexcept
71 using TypeTraits = FmtTypeTraits<SrcType>;
72 using SampleType = typename TypeTraits::Type;
74 const SampleType *RESTRICT ssrc{reinterpret_cast<const SampleType*>(src)};
75 for(size_t i{0u};i < samples;i++)
76 dst[i] = TypeTraits::template to<DstT>(ssrc[i*srcstep]);
81 #endif /* CORE_FMT_TRAITS_H */