eden-emu/eden
14
3
Fork 4
Code Issues 3 Pull requests 3 Projects Releases 2 Packages Wiki Activity Actions

audio_core: Apollo Part 1, AudioRenderer refactor

Browse source
This commit is contained in:
David Marcec 2020-07-12 21:59:14 +10:00
parent bcb6b4e574
commit 81b2b4fbe9
26 changed files with 4235 additions and 744 deletions
Download patch file Download diff file Expand all files Collapse all files

32
src/audio_core/algorithm/interpolate.cpp
View file

@ -197,4 +197,36 @@ std::vector<s16> Interpolate(InterpolationState& state, std::vector<s16> input,
return output;
}
void Resample(s32* output, const s32* input, s32 pitch, s32& fraction, std::size_t sample_count) {
const std::array<s16, 512>& lut = [pitch] {
if (pitch > 0xaaaa) {
return curve_lut0;
}
if (pitch <= 0x8000) {
return curve_lut1;
}
return curve_lut2;
}();
std::size_t index{};
for (std::size_t i = 0; i < sample_count; i++) {
const std::size_t lut_index{(static_cast<std::size_t>(fraction) >> 8) * 4};
const auto l0 = lut[lut_index + 0];
const auto l1 = lut[lut_index + 1];
const auto l2 = lut[lut_index + 2];
const auto l3 = lut[lut_index + 3];
const auto s0 = static_cast<s32>(input[index]);
const auto s1 = static_cast<s32>(input[index + 1]);
const auto s2 = static_cast<s32>(input[index + 2]);
const auto s3 = static_cast<s32>(input[index + 3]);
output[i] = (l0 * s0 + l1 * s1 + l2 * s2 + l3 * s3) >> 15;
fraction += pitch;
index += (fraction >> 15);
fraction &= 0x7fff;
}
}
} // namespace AudioCore