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author | bunnei <bunneidev@gmail.com> | 2021-02-15 05:09:15 +0100 |
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committer | GitHub <noreply@github.com> | 2021-02-15 05:09:15 +0100 |
commit | 8378b8a61feb971fc4b8af8468938e4691c2cfb7 (patch) | |
tree | 6df36c0a553a72ad4ec5dca2a5134b44d0f31849 /src/audio_core/common.h | |
parent | Merge pull request #5920 from bunnei/am-ldn-fix (diff) | |
parent | revert to std::sin and std::cos (diff) | |
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Diffstat (limited to 'src/audio_core/common.h')
-rw-r--r-- | src/audio_core/common.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/audio_core/common.h b/src/audio_core/common.h index ec59a3ba9..fe546c55d 100644 --- a/src/audio_core/common.h +++ b/src/audio_core/common.h @@ -33,6 +33,29 @@ constexpr std::size_t TEMP_MIX_BASE_SIZE = 0x3f00; // TODO(ogniK): Work out this // and our const ends up being 0x3f04, the 4 bytes are most // likely the sample history constexpr std::size_t TOTAL_TEMP_MIX_SIZE = TEMP_MIX_BASE_SIZE + AudioCommon::MAX_SAMPLE_HISTORY; +constexpr f32 I3DL2REVERB_MAX_LEVEL = 5000.0f; +constexpr f32 I3DL2REVERB_MIN_REFLECTION_DURATION = 0.02f; +constexpr std::size_t I3DL2REVERB_TAPS = 20; +constexpr std::size_t I3DL2REVERB_DELAY_LINE_COUNT = 4; +using Fractional = s32; + +template <typename T> +constexpr Fractional ToFractional(T x) { + return static_cast<Fractional>(x * static_cast<T>(0x4000)); +} + +constexpr Fractional MultiplyFractional(Fractional lhs, Fractional rhs) { + return static_cast<Fractional>(static_cast<s64>(lhs) * rhs >> 14); +} + +constexpr s32 FractionalToFixed(Fractional x) { + const auto s = x & (1 << 13); + return static_cast<s32>(x >> 14) + s; +} + +constexpr s32 CalculateDelaySamples(s32 sample_rate_khz, float time) { + return FractionalToFixed(MultiplyFractional(ToFractional(sample_rate_khz), ToFractional(time))); +} static constexpr u32 VersionFromRevision(u32_le rev) { // "REV7" -> 7 |