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// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <array>
#include "audio_core/common/common.h"
#include "common/common_types.h"
#include "common/fixed_point.h"
namespace AudioCore::AudioRenderer {
/**
* Holds a state for a voice. One is kept host-side, and one is used by the AudioRenderer,
* host-side is updated on the next iteration.
*/
struct VoiceState {
/**
* State of the voice's biquad filter.
*/
struct BiquadFilterState {
s64 s0;
s64 s1;
s64 s2;
s64 s3;
};
/**
* Context for ADPCM decoding.
*/
struct AdpcmContext {
u16 header;
s16 yn0;
s16 yn1;
};
/// Number of samples played
u64 played_sample_count;
/// Current offset from the starting offset
u32 offset;
/// Currently active wavebuffer index
u32 wave_buffer_index;
/// Array of which wavebuffers are currently valid
std::array<bool, MaxWaveBuffers> wave_buffer_valid;
/// Number of wavebuffers consumed, given back to the game
u32 wave_buffers_consumed;
/// History of samples, used for rate conversion
std::array<s16, MaxWaveBuffers * 2> sample_history;
/// Current read fraction, used for resampling
Common::FixedPoint<49, 15> fraction;
/// Current adpcm context
AdpcmContext adpcm_context;
/// Current biquad states, used when filtering
std::array<std::array<BiquadFilterState, MaxBiquadFilters>, MaxBiquadFilters> biquad_states;
/// Previous samples
std::array<s32, MaxMixBuffers> previous_samples;
/// Unused
u32 external_context_size;
/// Unused
bool external_context_enabled;
/// Was this voice dropped?
bool voice_dropped;
/// Number of times the wavebuffer has looped
s32 loop_count;
};
} // namespace AudioCore::AudioRenderer
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