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/system_manager.cpp | 162 +++++++++++++++++++++++++++++
 1 file changed, 162 insertions(+)
 create mode 100644 src/audio_core/renderer/system_manager.cpp

(limited to 'src/audio_core/renderer/system_manager.cpp')

diff --git a/src/audio_core/renderer/system_manager.cpp b/src/audio_core/renderer/system_manager.cpp
new file mode 100644
index 000000000..b326819ed
--- /dev/null
+++ b/src/audio_core/renderer/system_manager.cpp
@@ -0,0 +1,162 @@
+// SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <chrono>
+
+#include "audio_core/audio_core.h"
+#include "audio_core/renderer/adsp/adsp.h"
+#include "audio_core/renderer/system_manager.h"
+#include "common/microprofile.h"
+#include "common/thread.h"
+#include "core/core.h"
+#include "core/core_timing.h"
+
+MICROPROFILE_DEFINE(Audio_RenderSystemManager, "Audio", "Render System Manager",
+                    MP_RGB(60, 19, 97));
+
+namespace AudioCore::AudioRenderer {
+constexpr std::chrono::nanoseconds BaseRenderTime{5'000'000UL};
+constexpr std::chrono::nanoseconds RenderTimeOffset{400'000UL};
+
+SystemManager::SystemManager(Core::System& core_)
+    : core{core_}, adsp{core.AudioCore().GetADSP()}, mailbox{adsp.GetRenderMailbox()},
+      thread_event{Core::Timing::CreateEvent(
+          "AudioRendererSystemManager", [this](std::uintptr_t, s64 time, std::chrono::nanoseconds) {
+              return ThreadFunc2(time);
+          })} {
+    core.CoreTiming().RegisterPauseCallback([this](bool paused) { PauseCallback(paused); });
+}
+
+SystemManager::~SystemManager() {
+    Stop();
+}
+
+bool SystemManager::InitializeUnsafe() {
+    if (!active) {
+        if (adsp.Start()) {
+            active = true;
+            thread = std::jthread([this](std::stop_token stop_token) { ThreadFunc(); });
+            core.CoreTiming().ScheduleLoopingEvent(std::chrono::nanoseconds(0),
+                                                   BaseRenderTime - RenderTimeOffset, thread_event);
+        }
+    }
+
+    return adsp.GetState() == ADSP::State::Started;
+}
+
+void SystemManager::Stop() {
+    if (!active) {
+        return;
+    }
+    core.CoreTiming().UnscheduleEvent(thread_event, {});
+    active = false;
+    update.store(true);
+    update.notify_all();
+    thread.join();
+    adsp.Stop();
+}
+
+bool SystemManager::Add(System& system_) {
+    std::scoped_lock l2{mutex2};
+
+    if (systems.size() + 1 > MaxRendererSessions) {
+        LOG_ERROR(Service_Audio, "Maximum AudioRenderer Systems active, cannot add more!");
+        return false;
+    }
+
+    {
+        std::scoped_lock l{mutex1};
+        if (systems.empty()) {
+            if (!InitializeUnsafe()) {
+                LOG_ERROR(Service_Audio, "Failed to start the AudioRenderer SystemManager");
+                return false;
+            }
+        }
+    }
+
+    systems.push_back(&system_);
+    return true;
+}
+
+bool SystemManager::Remove(System& system_) {
+    std::scoped_lock l2{mutex2};
+
+    {
+        std::scoped_lock l{mutex1};
+        if (systems.remove(&system_) == 0) {
+            LOG_ERROR(Service_Audio,
+                      "Failed to remove a render system, it was not found in the list!");
+            return false;
+        }
+    }
+
+    if (systems.empty()) {
+        Stop();
+    }
+    return true;
+}
+
+void SystemManager::ThreadFunc() {
+    constexpr char name[]{"yuzu:AudioRenderSystemManager"};
+    MicroProfileOnThreadCreate(name);
+    Common::SetCurrentThreadName(name);
+    Common::SetCurrentThreadPriority(Common::ThreadPriority::High);
+    while (active) {
+        {
+            std::scoped_lock l{mutex1};
+
+            MICROPROFILE_SCOPE(Audio_RenderSystemManager);
+
+            for (auto system : systems) {
+                system->SendCommandToDsp();
+            }
+        }
+
+        adsp.Signal();
+        adsp.Wait();
+
+        update.wait(false);
+        update.store(false);
+    }
+}
+
+std::optional<std::chrono::nanoseconds> SystemManager::ThreadFunc2(s64 time) {
+    std::optional<std::chrono::nanoseconds> new_schedule_time{std::nullopt};
+    const auto queue_size{core.AudioCore().GetStreamQueue()};
+    switch (state) {
+    case StreamState::Filling:
+        if (queue_size >= 5) {
+            new_schedule_time = BaseRenderTime;
+            state = StreamState::Steady;
+        }
+        break;
+    case StreamState::Steady:
+        if (queue_size <= 2) {
+            new_schedule_time = BaseRenderTime - RenderTimeOffset;
+            state = StreamState::Filling;
+        } else if (queue_size > 5) {
+            new_schedule_time = BaseRenderTime + RenderTimeOffset;
+            state = StreamState::Draining;
+        }
+        break;
+    case StreamState::Draining:
+        if (queue_size <= 5) {
+            new_schedule_time = BaseRenderTime;
+            state = StreamState::Steady;
+        }
+        break;
+    }
+
+    update.store(true);
+    update.notify_all();
+    return new_schedule_time;
+}
+
+void SystemManager::PauseCallback(bool paused) {
+    if (paused && core.IsPoweredOn() && core.IsShuttingDown()) {
+        update.store(true);
+        update.notify_all();
+    }
+}
+
+} // namespace AudioCore::AudioRenderer
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