feat: Add pipewire backend

> only for testing current bmsound_wine implementation wine-side

hooks/audio/audio.h

@@ -11,6 +11,7 @@ namespace hooks::audio {
     enum class Backend {
         Asio,
         WaveOut,
+        Pipewire,
         None
     };
 
@@ -28,6 +29,8 @@ namespace hooks::audio {
             return Backend::Asio;
         } else if (_stricmp(value, "waveout") == 0) {
             return Backend::WaveOut;
+        } else if (_stricmp(value, "pipewire") == 0) {
+            return Backend::Pipewire;
         } else if (_stricmp(value, "none") == 0) {
             return Backend::None;
         }

hooks/audio/backends/wasapi/audio_client.cpp

@@ -9,6 +9,7 @@
 #include "hooks/audio/backends/wasapi/util.h"
 #include "hooks/audio/implementations/asio.h"
 #include "hooks/audio/implementations/wave_out.h"
+#include "hooks/audio/implementations/pipewire.h"
 #include "hooks/audio/implementations/none.h"
 //#include "util/co_task_mem_ptr.h"
 
@@ -161,6 +162,9 @@ IAudioClient *wrap_audio_client(IAudioClient *audio_client) {
             case hooks::audio::Backend::WaveOut:
                 backend = new WaveOutBackend();
                 break;
+            case hooks::audio::Backend::Pipewire:
+                backend = new PipewireBackend();
+                break;
             case hooks::audio::Backend::None:
                 backend = new NoneBackend();
                 break;

hooks/audio/implementations/pipewire.cpp

@@ -0,0 +1,111 @@
+#include "pipewire.h"
+#include "hooks/audio/audio.h"
+#include "hooks/audio/backends/wasapi/audio_client.h"
+#include "util/libutils.h"
+#include "launcher/launcher.h"
+
+/* Imports (refer to bmsound-wine.dll.spec) */
+typedef void(*BmswClientInit_t)(const char*);
+
+const WAVEFORMATEXTENSIBLE &PipewireBackend::format() const noexcept {
+    return format_;
+}
+
+HRESULT PipewireBackend::on_initialize(
+    AUDCLNT_SHAREMODE *ShareMode,
+    DWORD *StreamFlags,
+    REFERENCE_TIME *hnsBufferDuration,
+    REFERENCE_TIME *hnsPeriodicity,
+    const WAVEFORMATEX *pFormat,
+    LPCGUID AudioSessionGuid) noexcept
+{
+    log_info("audio::pipewire", "on_initialize");
+
+    // WASAPI init
+    *ShareMode = AUDCLNT_SHAREMODE_SHARED;
+    *StreamFlags = AUDCLNT_STREAMFLAGS_EVENTCALLBACK |
+            AUDCLNT_STREAMFLAGS_RATEADJUST |
+            AUDCLNT_STREAMFLAGS_AUTOCONVERTPCM |
+            AUDCLNT_STREAMFLAGS_SRC_DEFAULT_QUALITY;
+    *hnsBufferDuration = 100000;
+    *hnsPeriodicity = 100000;
+
+    // Start pipewire thread
+    if (!bmsw_) log_fatal("audio::pipewire", "Library not found: '{}'", (MODULE_PATH / "bmsound-wine.dll").string());
+    auto pipewireinit = (BmswClientInit_t)GetProcAddress(bmsw_, "BmswClientInit");
+    if (!pipewireinit) log_fatal("audio::pipewire", "Library invalid: '{}'", (MODULE_PATH / "bmsound-wine.dll").string());
+    internal_ = std::thread(pipewireinit,"GAME TITLE");
+
+    return S_OK;
+}
+HRESULT PipewireBackend::on_get_buffer_size(uint32_t *buffer_frames) noexcept {
+    *buffer_frames = 0;
+
+    return S_OK;
+}
+HRESULT PipewireBackend::on_get_stream_latency(REFERENCE_TIME *latency) noexcept {
+    *latency = 100000;
+
+    return S_OK;
+}
+HRESULT PipewireBackend::on_get_current_padding(std::optional<uint32_t> &padding_frames) noexcept {
+
+    padding_frames = 0;
+
+    return S_OK;
+}
+HRESULT PipewireBackend::on_is_format_supported(
+    AUDCLNT_SHAREMODE *ShareMode,
+    const WAVEFORMATEX *pFormat,
+    WAVEFORMATEX **ppClosestMatch) noexcept
+{
+    // only accept 44.1 kHz, stereo, 16-bits per channel
+    if (*ShareMode == AUDCLNT_SHAREMODE_EXCLUSIVE &&
+        pFormat->nChannels == 2 &&
+        pFormat->nSamplesPerSec == 44100 &&
+        pFormat->wBitsPerSample == 16)
+    {
+        return S_OK;
+    }
+
+    return AUDCLNT_E_UNSUPPORTED_FORMAT;
+}
+HRESULT PipewireBackend::on_get_mix_format(WAVEFORMATEX **pp_device_format) noexcept {
+    return E_NOTIMPL;
+}
+HRESULT PipewireBackend::on_get_device_period(
+    REFERENCE_TIME *default_device_period,
+    REFERENCE_TIME *minimum_device_period)
+{
+    *default_device_period = 10000;
+    *minimum_device_period = 10000;
+
+    return S_OK;
+}
+HRESULT PipewireBackend::on_start() noexcept {
+    return S_OK;
+}
+HRESULT PipewireBackend::on_stop() noexcept {
+    return S_OK;
+}
+HRESULT PipewireBackend::on_set_event_handle(HANDLE *event_handle) {
+
+    *event_handle = CreateEvent(nullptr, true, false, nullptr);
+
+    return S_OK;
+}
+
+HRESULT PipewireBackend::on_get_buffer(uint32_t num_frames_requested, BYTE **ppData) {
+    static BYTE buf[10000];
+    *ppData = buf;
+
+    return S_OK;
+}
+HRESULT PipewireBackend::on_release_buffer(uint32_t num_frames_written, DWORD dwFlags) {
+
+    return S_OK;
+}
+PipewireBackend::PipewireBackend() : format_(hooks::audio::FORMAT), bmsw_(libutils::try_library(MODULE_PATH / "bmsound-wine.dll"))
+{
+
+}

hooks/audio/implementations/pipewire.h

@@ -0,0 +1,51 @@
+#pragma once
+
+#include "backend.h"
+#include <thread>
+
+
+struct PipewireBackend final : AudioBackend {
+public:
+    explicit PipewireBackend();
+    ~PipewireBackend() final = default;
+
+    [[nodiscard]] const WAVEFORMATEXTENSIBLE &format() const noexcept override;
+
+    HRESULT on_initialize(
+        AUDCLNT_SHAREMODE *ShareMode,
+        DWORD *StreamFlags,
+        REFERENCE_TIME *hnsBufferDuration,
+        REFERENCE_TIME *hnsPeriodicity,
+        const WAVEFORMATEX *pFormat,
+        LPCGUID AudioSessionGuid) noexcept override;
+
+    HRESULT on_get_buffer_size(uint32_t *buffer_frames) noexcept override;
+    HRESULT on_get_stream_latency(REFERENCE_TIME *latency) noexcept override;
+    HRESULT on_get_current_padding(std::optional<uint32_t> &padding_frames) noexcept override;
+
+    HRESULT on_is_format_supported(
+        AUDCLNT_SHAREMODE *ShareMode,
+        const WAVEFORMATEX *pFormat,
+        WAVEFORMATEX **ppClosestMatch) noexcept override;
+
+    HRESULT on_get_mix_format(WAVEFORMATEX **pp_device_format) noexcept override;
+
+    HRESULT on_get_device_period(
+        REFERENCE_TIME *default_device_period,
+        REFERENCE_TIME *minimum_device_period) override;
+
+    HRESULT on_start() noexcept override;
+    HRESULT on_stop() noexcept override;
+    HRESULT on_set_event_handle(HANDLE *event_handle) override;
+
+    HRESULT on_get_buffer(uint32_t num_frames_requested, BYTE **ppData) override;
+    HRESULT on_release_buffer(uint32_t num_frames_written, DWORD dwFlags) override;
+
+private:
+
+    const WAVEFORMATEXTENSIBLE &format_;
+    std::thread internal_;
+    HMODULE bmsw_;
+    //BYTE *active_sound_buffer = nullptr;
+};
+