MPD  0.20.15
ShiftConvert.hxx
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19 
20 #ifndef MPD_PCM_SHIFT_CONVERT_HXX
21 #define MPD_PCM_SHIFT_CONVERT_HXX
22 
23 #include "Traits.hxx"
24 
29 template<SampleFormat SF, SampleFormat DF,
30  class ST=SampleTraits<SF>,
31  class DT=SampleTraits<DF>>
33  typedef ST SrcTraits;
34  typedef DT DstTraits;
35 
36  typedef typename SrcTraits::value_type SV;
37  typedef typename DstTraits::value_type DV;
38 
39  static_assert(SrcTraits::BITS < DstTraits::BITS,
40  "Source format must be smaller than destination format");
41 
42  constexpr static DV Convert(SV src) {
43  return DV(src) << (DstTraits::BITS - SrcTraits::BITS);
44  }
45 };
46 
51 template<SampleFormat SF, SampleFormat DF,
52  class ST=SampleTraits<SF>,
53  class DT=SampleTraits<DF>>
55  typedef ST SrcTraits;
56  typedef DT DstTraits;
57 
58  typedef typename SrcTraits::value_type SV;
59  typedef typename DstTraits::value_type DV;
60 
61  static_assert(SrcTraits::BITS > DstTraits::BITS,
62  "Source format must be smaller than destination format");
63 
64  constexpr static DV Convert(SV src) {
65  return src >> (SrcTraits::BITS - DstTraits::BITS);
66  }
67 };
68 
69 #endif
This template describes the specified SampleFormat.
Definition: PcmUtils.hxx:30
DstTraits::value_type DV
Convert from one integer sample format to another by shifting bits to the right.
static constexpr DV Convert(SV src)
Convert from one integer sample format to another by shifting bits to the left.
SampleFormat
static constexpr DV Convert(SV src)
SrcTraits::value_type SV
DstTraits::value_type DV
SrcTraits::value_type SV