From 458da8a94877677f086f06cdeecf959ec4283a33 Mon Sep 17 00:00:00 2001
From: Kelebek1 <eeeedddccc@hotmail.co.uk>
Date: Sat, 16 Jul 2022 23:48:45 +0100
Subject: Project Andio

---
 src/audio_core/renderer/voice/voice_state.h | 70 +++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 src/audio_core/renderer/voice/voice_state.h

(limited to 'src/audio_core/renderer/voice/voice_state.h')

diff --git a/src/audio_core/renderer/voice/voice_state.h b/src/audio_core/renderer/voice/voice_state.h
new file mode 100644
index 000000000..d5497e2fb
--- /dev/null
+++ b/src/audio_core/renderer/voice/voice_state.h
@@ -0,0 +1,70 @@
+// 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 {
+        Common::FixedPoint<50, 14> s0;
+        Common::FixedPoint<50, 14> s1;
+        Common::FixedPoint<50, 14> s2;
+        Common::FixedPoint<50, 14> 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
-- 
cgit v1.2.3