93 lines
2.2 KiB
C++
93 lines
2.2 KiB
C++
#include "audio.h"
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#include <vector>
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#include <windows.h>
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#include <initguid.h>
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#include <audioclient.h>
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#include <mmdeviceapi.h>
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#include "hooks/audio/backends/mmdevice/device_enumerator.h"
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#include "util/detour.h"
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#include "util/logging.h"
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#include "util/memutils.h"
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#include "audio_private.h"
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#ifdef _MSC_VER
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DEFINE_GUID(CLSID_MMDeviceEnumerator,
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0xBCDE0395, 0xE52F, 0x467C,
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0x8E, 0x3D, 0xC4, 0x57, 0x92, 0x91, 0x69, 0x2E);
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#endif
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// function pointers
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static decltype(CoCreateInstance) *CoCreateInstance_orig = nullptr;
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namespace hooks::audio {
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// public globals
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bool ENABLED = true;
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bool VOLUME_HOOK_ENABLED = true;
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bool USE_DUMMY = false;
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WAVEFORMATEXTENSIBLE FORMAT {};
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std::optional<Backend> BACKEND = std::nullopt;
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size_t ASIO_DRIVER_ID = 0;
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bool ASIO_FORCE_UNLOAD_ON_STOP = false;
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// private globals
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IAudioClient *CLIENT = nullptr;
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std::mutex INITIALIZE_LOCK; // for asio
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}
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static HRESULT STDAPICALLTYPE CoCreateInstance_hook(
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REFCLSID rclsid,
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LPUNKNOWN pUnkOuter,
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DWORD dwClsContext,
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REFIID riid,
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LPVOID *ppv)
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{
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// call original
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HRESULT ret = CoCreateInstance_orig(rclsid, pUnkOuter, dwClsContext, riid, ppv);
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if (FAILED(ret)) {
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if (IsEqualCLSID(rclsid, CLSID_MMDeviceEnumerator)) {
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log_warning("audio", "CoCreateInstance failed, hr={}", FMT_HRESULT(ret));
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}
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return ret;
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}
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// check if this is the audio device enumerator
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if (IsEqualCLSID(rclsid, CLSID_MMDeviceEnumerator)) {
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// wrap object
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auto mmde = reinterpret_cast<IMMDeviceEnumerator **>(ppv);
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*mmde = new WrappedIMMDeviceEnumerator(*mmde);
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}
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// return original result
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return ret;
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}
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namespace hooks::audio {
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void init() {
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if (!ENABLED) {
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return;
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}
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log_info("audio", "initializing");
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init_low_latency();
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// general hooks
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CoCreateInstance_orig = detour::iat_try("CoCreateInstance", CoCreateInstance_hook);
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}
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void stop() {
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log_info("audio", "stopping");
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if (CLIENT) {
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CLIENT->Stop();
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CLIENT->Release();
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CLIENT = nullptr;
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}
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stop_low_latency();
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}
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}
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