codec: Make lookup table static constexpr
Allows compilers to elide needing to push these values on the stack every time the function is called.
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@ -16,8 +16,9 @@ std::vector<s16> DecodeADPCM(const u8* const data, std::size_t size, const ADPCM
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constexpr std::size_t FRAME_LEN = 8;
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constexpr std::size_t SAMPLES_PER_FRAME = 14;
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constexpr std::array<int, 16> SIGNED_NIBBLES = {
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{0, 1, 2, 3, 4, 5, 6, 7, -8, -7, -6, -5, -4, -3, -2, -1}};
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static constexpr std::array<int, 16> SIGNED_NIBBLES{
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0, 1, 2, 3, 4, 5, 6, 7, -8, -7, -6, -5, -4, -3, -2, -1,
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};
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const std::size_t sample_count = (size / FRAME_LEN) * SAMPLES_PER_FRAME;
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const std::size_t ret_size =
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@ -38,7 +38,7 @@ using ADPCM_Coeff = std::array<s16, 16>;
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* @param state ADPCM state, this is updated with new state
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* @return Decoded stereo signed PCM16 data, sample_count in length
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*/
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std::vector<s16> DecodeADPCM(const u8* const data, std::size_t size, const ADPCM_Coeff& coeff,
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std::vector<s16> DecodeADPCM(const u8* data, std::size_t size, const ADPCM_Coeff& coeff,
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ADPCMState& state);
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}; // namespace AudioCore::Codec
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