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pcm/Dsd2Pcm: move code to ApplySample()

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For some reason, this speeds up the library by 2%.
This commit is contained in:
Max Kellermann 2020-01-14 22:43:11 +01:00
parent 2d5bf53240
commit 9647b2cb01
2 changed files with 11 additions and 3 deletions
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13
src/pcm/Dsd2Pcm.cxx
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@ -163,6 +163,14 @@ Dsd2Pcm::Reset() noexcept
*/ */
} }
inline void
Dsd2Pcm::ApplySample(size_t ffp, uint8_t src) noexcept
{
fifo[ffp] = src;
uint8_t *p = fifo + ((ffp-CTABLES) & FIFOMASK);
*p = bit_reverse(*p);
}
inline float inline float
Dsd2Pcm::CalcOutputSample(size_t ffp) const noexcept Dsd2Pcm::CalcOutputSample(size_t ffp) const noexcept
{ {
@ -184,10 +192,9 @@ Dsd2Pcm::Translate(size_t samples,
size_t ffp = fifopos; size_t ffp = fifopos;
while (samples-- > 0) { while (samples-- > 0) {
unsigned bite1 = *src & 0xFFu; unsigned bite1 = *src & 0xFFu;
src += src_stride;
if (lsbf) bite1 = bit_reverse(bite1); if (lsbf) bite1 = bit_reverse(bite1);
fifo[ffp] = bite1; src += src_stride; ApplySample(ffp, bite1);
uint8_t *p = fifo + ((ffp-CTABLES) & FIFOMASK);
*p = bit_reverse(*p);
*dst = CalcOutputSample(ffp); *dst = CalcOutputSample(ffp);
dst += dst_stride; dst += dst_stride;
ffp = (ffp + 1) & FIFOMASK; ffp = (ffp + 1) & FIFOMASK;

1
src/pcm/Dsd2Pcm.hxx
View File

@ -76,6 +76,7 @@ public:
float *dst, ptrdiff_t dst_stride) noexcept; float *dst, ptrdiff_t dst_stride) noexcept;
private: private:
void ApplySample(size_t ffp, uint8_t src) noexcept;
float CalcOutputSample(size_t ffp) const noexcept; float CalcOutputSample(size_t ffp) const noexcept;
}; };