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pcm/Dsd{16,32}: move the conversion loop to a separate function

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This commit is contained in:
Max Kellermann 2019-06-17 22:51:01 +02:00
parent ca8451cdbc
commit 96d74e77eb
2 changed files with 30 additions and 20 deletions
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25
src/pcm/Dsd16.cxx
View File

@ -39,6 +39,18 @@ Dsd8To16Sample(const uint8_t *src, unsigned channels) noexcept
return Construct16(src[0], src[channels]);
}
static void
Dsd8To16(uint16_t *dest, const uint8_t *src,
size_t out_frames, unsigned channels) noexcept
{
for (size_t i = 0; i < out_frames; ++i) {
for (size_t c = 0; c < channels; ++c)
*dest++ = Dsd8To16Sample(src++, channels);
src += channels;
}
}
ConstBuffer<uint16_t>
Dsd8To16(PcmBuffer &buffer, unsigned channels,
ConstBuffer<uint8_t> _src) noexcept
@ -48,15 +60,8 @@ Dsd8To16(PcmBuffer &buffer, unsigned channels,
const size_t out_samples = out_frames * channels;
const uint8_t *src = _src.data;
uint16_t *const dest0 = buffer.GetT<uint16_t>(out_samples);
uint16_t *dest = dest0;
const auto dest = buffer.GetT<uint16_t>(out_samples);
Dsd8To16(dest, src, out_frames, channels);
for (size_t i = 0; i < out_frames; ++i) {
for (size_t c = 0; c < channels; ++c)
*dest++ = Dsd8To16Sample(src++, channels);
src += channels;
}
return {dest0, out_samples};
return {dest, out_samples};
}

25
src/pcm/Dsd32.cxx
View File

@ -41,6 +41,18 @@ Dsd8To32Sample(const uint8_t *src, unsigned channels) noexcept
src[2 * channels], src[3 * channels]);
}
static void
Dsd8To32(uint32_t *dest, const uint8_t *src,
size_t out_frames, unsigned channels) noexcept
{
for (size_t i = 0; i < out_frames; ++i) {
for (size_t c = 0; c < channels; ++c)
*dest++ = Dsd8To32Sample(src++, channels);
src += 3 * channels;
}
}
ConstBuffer<uint32_t>
Dsd8To32(PcmBuffer &buffer, unsigned channels,
ConstBuffer<uint8_t> _src) noexcept
@ -50,15 +62,8 @@ Dsd8To32(PcmBuffer &buffer, unsigned channels,
const size_t out_samples = out_frames * channels;
const uint8_t *src = _src.data;
uint32_t *const dest0 = buffer.GetT<uint32_t>(out_samples);
uint32_t *dest = dest0;
const auto dest = buffer.GetT<uint32_t>(out_samples);
Dsd8To32(dest, src, out_frames, channels);
for (size_t i = 0; i < out_frames; ++i) {
for (size_t c = 0; c < channels; ++c)
*dest++ = Dsd8To32Sample(src++, channels);
src += 3 * channels;
}
return {dest0, out_samples};
return {dest, out_samples};
}