Rewrite streaming code to C++ and forklift most of the setup out of the GUI code

app/streaming/session.hpp

@@ -0,0 +1,69 @@
+#pragma once
+
+#include <Limelight.h>
+#include <opus_multistream.h>
+#include "backend/computermanager.h"
+#include "input.hpp"
+
+#include <QMessageBox>
+
+
+class Session
+{
+public:
+    explicit Session(NvComputer* computer, NvApp& app);
+
+    QString checkForFatalValidationError();
+
+    QStringList checkForAdvisoryValidationError();
+
+    void exec();
+
+private:
+    static
+    void clStageStarting(int stage);
+
+    static
+    void clStageFailed(int stage, long errorCode);
+
+    static
+    void clConnectionTerminated(long errorCode);
+
+    static
+    void clLogMessage(const char* format, ...);
+
+    static
+    int sdlDetermineAudioConfiguration();
+
+    static
+    int sdlAudioInit(int audioConfiguration,
+                     POPUS_MULTISTREAM_CONFIGURATION opusConfig,
+                     void* arContext, int arFlags);
+
+    static
+    void sdlAudioStart();
+
+    static
+    void sdlAudioStop();
+
+    static
+    void sdlAudioCleanup();
+
+    static
+    void sdlAudioDecodeAndPlaySample(char* sampleData, int sampleLength);
+
+    STREAM_CONFIGURATION m_StreamConfig;
+    QMessageBox m_ProgressBox;
+    NvComputer* m_Computer;
+    NvApp m_App;
+
+    static SDL_AudioDeviceID s_AudioDevice;
+    static OpusMSDecoder* s_OpusDecoder;
+    static short s_OpusDecodeBuffer[];
+    static int s_ChannelCount;
+
+    static AUDIO_RENDERER_CALLBACKS k_AudioCallbacks;
+    static DECODER_RENDERER_CALLBACKS k_VideoCallbacks;
+    static CONNECTION_LISTENER_CALLBACKS k_ConnCallbacks;
+    static Session* s_ActiveSession;
+};