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-rw-r--r--src/audio_core/codec.h44
1 files changed, 44 insertions, 0 deletions
diff --git a/src/audio_core/codec.h b/src/audio_core/codec.h
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+// 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