mirror of
https://github.com/Dingo-Shenanigans/ReSkate.git
synced 2026-10-17 22:07:05 +02:00
355 lines
16 KiB
C++
355 lines
16 KiB
C++
#include "native_audio.h"
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#include "native_audio_layout.h"
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#include "native_audio_binding.h"
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#include "audio_capture.h"
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#include "native_pose_layout.h"
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#include "Engine/Core/Hooks/hooks.h"
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#include "Engine/Core/Log/logging.h"
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#include "Engine/Core/Platform/memory.h"
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#include "Engine/Game/Build/addresses.h"
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#include "Engine/Game/Build/20260929/engine.h"
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#include "Engine/Game/Build/20260929/native_audio.h"
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#include <Windows.h>
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#include "Extension/Multiplayer/Session/monotonic_clock.h"
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#include "Extension/Multiplayer/Session/peer_slots.h"
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#include <algorithm>
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#include <array>
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#include <atomic>
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#include <mutex>
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#include <memory>
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#include <format>
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#include <cstring>
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namespace dingosdk::multiplayer {
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namespace {
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namespace sound = addr::native_audio;
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using Address = std::uintptr_t;
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bool readable(Address p, void *out, std::size_t size) {
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if (p < 0x10000 || size >= memory::highest_user_address || p > memory::highest_user_address - size)
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return false;
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__try {
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std::memcpy(out, reinterpret_cast<const void *>(p), size);
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return true;
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} __except (EXCEPTION_EXECUTE_HANDLER) {
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return false;
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}
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}
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template <class T> T get(Address p, std::size_t off = 0) {
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return native_pose_detail::value<T>(readable, native_pose_detail::add(p, off), "skater audio");
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}
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Address ptr(Address p, std::size_t off = 0) { return get<Address>(p, off); }
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void require(bool valid, const char *why) { native_pose_detail::require(valid, why); }
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struct State {
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Address base{};
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DWORD client_thread{};
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std::atomic<Address> local_component{}, local_entity{};
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std::atomic<std::uint64_t> captured{};
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std::uint64_t next_local_audit{};
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void (*submit)(Address, const NativeAudioFrame *){};
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bool attempted{}, installed{};
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std::mutex mutex;
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std::unique_ptr<NativeAudioFrame> accumulated = std::make_unique<NativeAudioFrame>();
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AudioCaptureBuffer queue;
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std::string capture_issue;
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// Each slot's remote sound component, contiguous so submit_hook (every skater's
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// sound update) scans a few cache lines up to `bound`, the highest slot that
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// has ever stored one plus one. The bound grows before the component is stored.
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std::array<std::atomic<Address>, max_remote_players> components{};
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std::atomic<std::size_t> bound{};
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};
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State &state() {
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static auto *s = new State;
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return *s;
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}
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struct RemoteAudio {
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Address manager{};
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std::atomic<Address> remote_entity{};
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std::atomic<std::uint64_t> played{};
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bool playing{};
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std::uint16_t last_handle{}; // Diagnostic only; owned by the native component.
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std::string playback_issue;
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// Owners of the last full binding resolve (read_native_audio_binding walks both
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// actors' component collections). Updates between the 1 Hz resolves re-check
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// these with a few reads and read only the handle again. Client thread.
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Address source{}, binding_local{}, binding_context{};
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std::uint64_t binding_actor{}; // remote_skater_generation() of the actor resolved
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ULONGLONG next_binding{};
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};
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RemoteAudio &remote() {
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static auto *r = new PeerStorage<RemoteAudio>;
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return r->current();
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}
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std::atomic<Address> &remote_component() { return state().components[peer_slot]; }
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void set_remote_component(Address component) noexcept {
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auto &s = state();
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if (component) {
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const auto needed = peer_slot + 1;
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for (auto current = s.bound.load(std::memory_order_acquire);
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current < needed && !s.bound.compare_exchange_weak(current, needed, std::memory_order_acq_rel);) {
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}
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}
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remote_component().store(component, std::memory_order_release);
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}
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void submit_hook(Address handle, const NativeAudioFrame *frame) {
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auto &s = state();
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// The visual-only actor submits default inputs after animation evaluation.
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// Suppress those updates so they cannot overwrite our buffered peer inputs.
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// Handle creation, description changes and destruction still run natively.
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const auto error_before = GetLastError();
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bool suppress{};
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const auto component = handle > 0x74 ? handle - 0x74 : 0;
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const auto bound = component ? std::min(s.bound.load(std::memory_order_acquire), max_remote_players)
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: std::size_t{};
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// A stale slot can still hold a destroyed actor's component address: keep
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// looking until one slot's actor owns it.
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for (std::size_t slot = 0; slot < bound && !suppress; ++slot) {
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if (s.components[slot].load(std::memory_order_acquire) != component)
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continue;
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const PeerScope scope(slot);
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try {
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const auto actor = remote().remote_entity.load();
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if (actor && actor == remote_skater_entity() &&
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ptr(component) == s.base + addr::engine::skater_audio_component_vtable &&
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ptr(ptr(component, 0x18)) == actor && !ptr(actor, 0xf8)) {
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suppress = true;
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}
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} catch (...) {
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}
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}
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SetLastError(error_before);
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if (suppress)
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return;
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s.submit(handle, frame); // Original local audio is always forwarded unchanged.
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const auto c = s.local_component.load(std::memory_order_acquire);
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if (!c || handle != c + 0x74)
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return;
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const auto error = GetLastError();
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std::lock_guard lock(s.mutex);
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try {
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if (c != s.local_component.load() || ptr(c) != s.base + addr::engine::skater_audio_component_vtable ||
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ptr(ptr(c, 0x18)) != s.local_entity.load() || get<std::uint16_t>(handle) < 2)
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throw std::runtime_error("Local sound capture ownership changed.");
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NativeAudioFrame snapshot;
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require(readable(reinterpret_cast<Address>(frame), snapshot.bytes.data(), 0x218),
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"Native sound update is unreadable.");
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const std::array<std::uint32_t, 4> masks{
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audio_value<std::uint32_t>(snapshot, 0x164), audio_value<std::uint32_t>(snapshot, 0x130),
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audio_value<std::uint32_t>(snapshot, 0x124), audio_value<std::uint32_t>(snapshot, 0xc0)};
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require(!(masks[3] & ~0x07ffffffU), "Native sound update fields differ.");
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// Pure native field copy merges partial updates into owned storage.
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// It contains only primitive fields and does not allocate or call out.
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reinterpret_cast<void (*)(NativeAudioFrame *, const NativeAudioFrame *, const void *)>(
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s.base + sound::frame_copy)(s.accumulated.get(), &snapshot, masks.data());
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s.queue.push(audio_state(*s.accumulated), now_us());
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++s.captured;
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s.capture_issue.clear();
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} catch (const std::exception &e) {
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s.capture_issue = e.what();
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}
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SetLastError(error);
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}
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template <std::size_t N>
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void fingerprint(Address base, Address rva, const std::array<std::uint8_t, N> &bytes) {
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std::array<std::uint8_t, 32> actual{};
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require(bytes.size() <= actual.size() && readable(base + rva, actual.data(), bytes.size()) &&
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std::equal(bytes.begin(), bytes.end(), actual.begin()),
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"Native skater sound function differs.");
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}
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void install(Address base) {
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auto &s = state();
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require(!s.attempted, "Sound hook installation requires restarting ReSkate.");
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fingerprint(base, sound::submit, sound::submit_prefix);
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fingerprint(base, sound::frame_copy, sound::frame_copy_prefix);
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fingerprint(base, sound::frame_reset, sound::frame_reset_prefix);
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fingerprint(base, sound::stop_sound, sound::stop_sound_prefix);
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s.attempted = true;
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s.base = base;
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s.client_thread = GetCurrentThreadId();
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void *original{};
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auto *target = reinterpret_cast<void *>(base + sound::submit);
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require(hook_prepare(target, reinterpret_cast<void *>(&submit_hook), &original) == HookOk,
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"Cannot prepare skater sound capture.");
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s.submit = reinterpret_cast<decltype(s.submit)>(original);
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require(hook_enable(target) == HookOk, "Cannot enable skater sound capture.");
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s.installed = true;
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}
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// The remote actor's sound binding for this update. A full resolve walks both
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// actors' component collections; it runs at 1 Hz, or when the owners found last
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// time no longer check out. Between, the handle is the only field read again.
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NativeAudioBinding resolve_binding(Address base, const NativeFrame &local, Address actor) {
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auto &r = remote();
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const auto now = GetTickCount64();
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if (const auto component = remote_component().load(std::memory_order_acquire);
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component && now < r.next_binding && r.binding_actor == remote_skater_generation() &&
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r.remote_entity.load() == actor && r.binding_local == local.entity &&
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r.binding_context == local.context && r.source &&
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ptr(component) == base + addr::engine::skater_audio_component_vtable &&
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ptr(ptr(component, 0x18)) == actor && ptr(base, addr::engine::audio_manager) == r.manager) {
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NativeAudioBinding out{component, r.manager, get<std::uint16_t>(component, 0x74), r.source};
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// The same handle rules as read_native_audio_binding.
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require(!out.handle || (out.handle >= 2 && out.handle != get<std::uint16_t>(r.source, 0x74) &&
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get<std::uint8_t>(component, 0x76) == 0),
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"Remote sound handle ownership differs.");
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return out;
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}
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const auto out = read_native_audio_binding(readable, base, local.entity, actor, local.context);
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r.binding_actor = remote_skater_generation();
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r.source = out.source;
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r.binding_local = local.entity;
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r.binding_context = local.context;
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r.next_binding = now + 1000;
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return out;
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}
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} // namespace
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void prepare_remote_audio(Address base) noexcept {
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try {
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if (!state().attempted) install(base);
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} catch (...) {}
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}
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void prepare_audio_capture(Address base, const NativeFrame &local) noexcept {
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auto &s = state();
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try {
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if (!s.installed)
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install(base);
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require(base == s.base && GetCurrentThreadId() == s.client_thread,
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"Skater sound must update on the client thread.");
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const auto now = now_us();
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if (s.local_entity.load(std::memory_order_acquire) == local.entity &&
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s.local_component.load(std::memory_order_acquire) && now < s.next_local_audit)
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return;
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const auto component =
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read_native_component(readable, local.entity, base + addr::engine::skater_audio_component_vtable);
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require(ptr(local.entity) == base + addr::engine::skater_entity_vtable && ptr(local.entity, 0xf8),
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"Local sound actor ownership differs.");
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if (component != s.local_component.load() || local.entity != s.local_entity.load()) {
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s.local_component.store(0, std::memory_order_release);
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std::lock_guard lock(s.mutex);
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s.queue.clear();
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*s.accumulated = {};
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reinterpret_cast<void (*)(void *)>(base + sound::frame_reset)(s.accumulated.get());
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s.local_entity.store(local.entity);
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s.local_component.store(component, std::memory_order_release);
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s.capture_issue.clear();
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}
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s.next_local_audit = now + 1000000;
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} catch (const std::exception &e) {
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std::lock_guard lock(s.mutex);
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s.capture_issue = e.what();
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}
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}
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std::vector<AudioSample> drain_audio_capture(std::uint64_t now) {
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auto &s = state();
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std::lock_guard lock(s.mutex);
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return s.queue.drain(now);
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}
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void stop_remote_audio() noexcept {
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auto &s = state();
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remote().next_binding = 0; // resolve in full next time, whatever was playing
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if (!remote().playing)
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return;
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remote().playing = false;
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try {
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const auto actor = remote().remote_entity.load();
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if (s.installed && GetCurrentThreadId() == s.client_thread && actor &&
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actor == remote_skater_entity()) {
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const auto binding =
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read_native_audio_binding(readable, s.base, s.local_entity.load(), actor, ptr(actor, 0x20));
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if (binding.component == remote_component().load() &&
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binding.manager == remote().manager && binding.handle) {
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// Use the component's native stop operation, including clearing
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// its handle. Never release a cached ID that could be recycled.
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reinterpret_cast<void (*)(Address)>(s.base + sound::stop_sound)(binding.component + 0x74);
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logging::log(logging::Level::debug, logging::Channel::runtime,
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"Multiplayer: native peer sound stopped; actor={:#x}, handle={}.", actor,
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binding.handle);
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}
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}
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} catch (...) { // Entity/manager teardown may already have destroyed the voice.
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}
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remote().last_handle = 0;
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remote().manager = 0;
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remote().next_binding = 0;
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// Keep suppressing this actor's default submissions while sound is stale.
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// A subsequent native update may create an idle handle, but it receives no
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// locomotion inputs until fresh peer data arrives. Entity destruction owns it.
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}
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void reset_audio() noexcept {
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auto &s = state();
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each_peer([&] {
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stop_remote_audio();
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set_remote_component(0);
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remote().remote_entity.store(0);
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remote().next_binding = 0;
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remote().playback_issue.clear();
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});
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s.local_component.store(0, std::memory_order_release);
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s.local_entity.store(0);
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s.next_local_audit = 0;
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std::lock_guard lock(s.mutex);
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s.queue.clear();
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s.capture_issue.clear();
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remote().playback_issue.clear();
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}
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void update_remote_audio(Address base, const NativeFrame &local, const Pose &pose,
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const AudioState &audio) noexcept {
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auto &s = state();
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try {
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require(s.installed && base == s.base && GetCurrentThreadId() == s.client_thread,
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"Native sound playback is unavailable.");
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const auto actor = remote_skater_entity();
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const auto binding = resolve_binding(base, local, actor);
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if (remote().remote_entity.load() != actor || remote_component().load() != binding.component ||
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remote().manager != binding.manager) {
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stop_remote_audio();
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set_remote_component(0);
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remote().remote_entity.store(actor);
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set_remote_component(binding.component);
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remote().manager = binding.manager;
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}
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if (!binding.handle) {
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remote().playing = false;
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std::lock_guard lock(s.mutex);
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remote().playback_issue = "Waiting for the remote actor's native sound handle.";
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return;
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}
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const auto frame = audio_frame(audio, pose);
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// Call the original submit directly. The hook only suppresses the
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// engine's visual-only defaults; all sound synthesis stays native.
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s.submit(binding.component + 0x74, &frame);
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remote().playing = true;
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if (remote().last_handle != binding.handle) {
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remote().last_handle = binding.handle;
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logging::log(logging::Level::debug, logging::Channel::runtime,
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"Multiplayer: native peer sound bound; actor={:#x}, component={:#x}, handle={}, "
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"manager={:#x}.",
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actor, binding.component, binding.handle, binding.manager);
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}
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++remote().played;
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// Only this thread writes the issue; the lock is for status readers.
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if (!remote().playback_issue.empty()) {
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std::lock_guard lock(s.mutex);
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remote().playback_issue.clear();
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}
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} catch (const std::exception &e) {
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stop_remote_audio();
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remote().next_binding = 0; // resolve in full next time
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std::lock_guard lock(s.mutex);
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remote().playback_issue = e.what();
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}
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}
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std::string native_audio_status() {
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auto &s = state();
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std::lock_guard lock(s.mutex);
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if (!s.capture_issue.empty())
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return "Sound: " + s.capture_issue;
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if (!remote().playback_issue.empty())
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return "Sound: " + remote().playback_issue;
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if (!s.captured.load())
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return "Sound: waiting for native skater audio updates.";
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return remote().playing ? "Sound: native spatial skater and skateboard playback active."
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: "Sound: captured; waiting for peer playback.";
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}
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std::uint64_t captured_audio_frames() noexcept { return state().captured.load(); }
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std::uint64_t played_audio_frames() noexcept { return remote().played.load(); }
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} // namespace dingosdk::multiplayer
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