Core.cpp

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#include "Core.hpp"
#include "MayaFlux/Core/Engine.hpp"
 
#include "MayaFlux/Journal/Archivist.hpp"
 
namespace MayaFlux {
 
//-------------------------------------------------------------------------
// Internal Functions and Data
//-------------------------------------------------------------------------
 
namespace internal {
 
    std::unique_ptr<Core::Engine> engine_ref;
    bool initialized = false;
    bool terminating = false;
    std::recursive_mutex engine_mutex;
 
    void cleanup_engine()
    {
        std::lock_guard<std::recursive_mutex> lock(engine_mutex);
        if (engine_ref) {
            if (initialized) {
                engine_ref->End();
                Journal::Archivist::shutdown();
            }
            engine_ref.reset();
            initialized = false;
        }
    }
 
    Core::Engine& get_or_create_engine()
    {
        std::lock_guard<std::recursive_mutex> lock(engine_mutex);
        if (!engine_ref) {
            engine_ref = std::make_unique<Core::Engine>();
            std::atexit(cleanup_engine);
        }
        terminating = false;
        initialized = true;
        return *engine_ref;
    }
 
}
 
//-------------------------------------------------------------------------
// Engine Management
//-------------------------------------------------------------------------
 
bool is_initialized()
{
    if (internal::terminating) {
        return false;
    }
    return internal::initialized;
}
 
Core::Engine& get_context()
{
    return internal::get_or_create_engine();
}
 
void set_and_transfer_context(Core::Engine instance)
{
    bool is_same_instance = false;
 
    {
        std::lock_guard<std::recursive_mutex> lock(internal::engine_mutex);
        is_same_instance = (&instance == internal::engine_ref.get());
        if (internal::engine_ref && !is_same_instance && internal::engine_ref->is_running()) {
            internal::engine_ref->Pause();
        }
    }
 
    if (internal::engine_ref && !is_same_instance) {
        internal::engine_ref->End();
    }
 
    if (!is_same_instance) {
        std::lock_guard<std::recursive_mutex> lock(internal::engine_mutex);
        internal::engine_ref = std::make_unique<Core::Engine>(std::move(instance));
        internal::initialized = true;
    }
}
 
void Init()
{
    auto& engine = internal::get_or_create_engine();
    engine.Init();
}
 
void Init(uint32_t sample_rate, uint32_t buffer_size, uint32_t num_out_channels, uint32_t num_in_channels)
{
    auto& engine = internal::get_or_create_engine();
    auto& stream_info = engine.get_stream_info();
 
    stream_info.sample_rate = sample_rate;
    stream_info.buffer_size = buffer_size;
    stream_info.output.channels = num_out_channels;
    stream_info.input.channels = num_in_channels;
    engine.Init();
}
 
void Init(Core::GlobalStreamInfo stream_info)
{
    auto& engine = internal::get_or_create_engine();
    engine.Init(stream_info);
}
 
void Init(Core::GlobalStreamInfo stream_info, Core::GlobalGraphicsConfig graphics_config)
{
    auto& engine = internal::get_or_create_engine();
    engine.Init(stream_info, graphics_config);
}
 
void Start()
{
    get_context().Start();
}
 
void Pause()
{
    if (internal::initialized) {
        get_context().Pause();
    }
}
 
void Resume()
{
    if (internal::initialized) {
        get_context().Resume();
    }
}
 
void Await()
{
    if (internal::initialized) {
        get_context().await_shutdown();
    }
}
 
void End()
{
    internal::terminating = true;
    if (internal::initialized) {
        internal::cleanup_engine();
    }
}
 
}