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author | bunnei <bunneidev@gmail.com> | 2018-08-03 21:30:01 +0200 |
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committer | bunnei <bunneidev@gmail.com> | 2018-08-05 00:22:58 +0200 |
commit | f1cb3903ac358183dcdc562ba19dc469b056e73f (patch) | |
tree | 0179ee55d3c573cdd9189cb708e2b69e02a1b166 /src/audio_core/codec.h | |
parent | cubeb_sink: Support variable sample_rate and num_channels. (diff) | |
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Diffstat (limited to '')
-rw-r--r-- | src/audio_core/codec.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/audio_core/codec.h b/src/audio_core/codec.h new file mode 100644 index 000000000..3f845c42c --- /dev/null +++ b/src/audio_core/codec.h @@ -0,0 +1,44 @@ +// Copyright 2018 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#pragma once + +#include <array> +#include <vector> + +#include "common/common_types.h" + +namespace AudioCore::Codec { + +enum class PcmFormat : u32 { + Invalid = 0, + Int8 = 1, + Int16 = 2, + Int24 = 3, + Int32 = 4, + PcmFloat = 5, + Adpcm = 6, +}; + +/// See: Codec::DecodeADPCM +struct ADPCMState { + // Two historical samples from previous processed buffer, + // required for ADPCM decoding + s16 yn1; ///< y[n-1] + s16 yn2; ///< y[n-2] +}; + +using ADPCM_Coeff = std::array<s16, 16>; + +/** + * @param data Pointer to buffer that contains ADPCM data to decode + * @param size Size of buffer in bytes + * @param coeff ADPCM coefficients + * @param state ADPCM state, this is updated with new state + * @return Decoded stereo signed PCM16 data, sample_count in length + */ +std::vector<s16> DecodeADPCM(const u8* const data, size_t size, const ADPCM_Coeff& coeff, + ADPCMState& state); + +}; // namespace AudioCore::Codec |