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// Copyright 2016 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <array>
#include "audio_core/audio_types.h"
#include "common/common_types.h"
namespace AudioCore::Codec {
/// 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]
};
/**
* @param data Pointer to buffer that contains ADPCM data to decode
* @param sample_count Length of buffer in terms of number of samples
* @param adpcm_coeff ADPCM coefficients
* @param state ADPCM state, this is updated with new state
* @return Decoded stereo signed PCM16 data, sample_count in length
*/
StereoBuffer16 DecodeADPCM(const u8* data, const std::size_t sample_count,
const std::array<s16, 16>& adpcm_coeff, ADPCMState& state);
/**
* @param num_channels Number of channels
* @param data Pointer to buffer that contains PCM8 data to decode
* @param sample_count Length of buffer in terms of number of samples
* @return Decoded stereo signed PCM16 data, sample_count in length
*/
StereoBuffer16 DecodePCM8(const unsigned num_channels, const u8* const data,
const std::size_t sample_count);
/**
* @param num_channels Number of channels
* @param data Pointer to buffer that contains PCM16 data to decode
* @param sample_count Length of buffer in terms of number of samples
* @return Decoded stereo signed PCM16 data, sample_count in length
*/
StereoBuffer16 DecodePCM16(const unsigned num_channels, const u8* const data,
const std::size_t sample_count);
} // namespace AudioCore::Codec
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