Method SoundRecorder

src/SFML/Audio/SoundRecorder.cpp:163–239

///////////////////////////////////////////////////////

////////////////////////////////////////////////////////////
SoundRecorder::SoundRecorder() : m_impl(std::make_unique<Impl>(this))
{
    // Create the log
    m_impl->log.emplace();

    if (const auto result = ma_log_init(nullptr, &*m_impl->log); result != MA_SUCCESS)
    {
        m_impl->log.reset();
        err() << "Failed to initialize the audio log: " << ma_result_description(result) << std::endl;
        return;
    }

    // Register our logging callback to output any warning/error messages
    if (const auto result = ma_log_register_callback(&*m_impl->log,
                                                     ma_log_callback_init(
                                                         [](void*, std::uint32_t level, const char* message)
                                                         {
                                                             if (level <= MA_LOG_LEVEL_WARNING)
                                                                 err() << "miniaudio " << ma_log_level_to_string(level)
                                                                       << ": " << message << std::flush;
                                                         },
                                                         nullptr));
        result != MA_SUCCESS)
        err() << "Failed to register audio log callback: " << ma_result_description(result) << std::endl;

    // Create the context
    m_impl->context.emplace();

    auto contextConfig                                 = ma_context_config_init();
    contextConfig.pLog                                 = &*m_impl->log;
    std::uint32_t                          deviceCount = 0;
    const auto                             nullBackend = ma_backend_null;
    const std::array<const ma_backend*, 2> backendLists{nullptr, &nullBackend};

    for (const auto* backendList : backendLists)
    {
        // We can set backendCount to 1 since it is ignored when backends is set to nullptr
        if (const auto result = ma_context_init(backendList, 1, &contextConfig, &*m_impl->context); result != MA_SUCCESS)
        {
            m_impl->context.reset();
            err() << "Failed to initialize the audio capture context: " << ma_result_description(result) << std::endl;
            return;
        }

        // Count the capture devices
        if (const auto result = ma_context_get_devices(&*m_impl->context, nullptr, nullptr, nullptr, &deviceCount);
            result != MA_SUCCESS)
        {
            err() << "Failed to get audio capture devices: " << ma_result_description(result) << std::endl;
            return;
        }

        // Check if there are audio capture devices available on the system
        if (deviceCount > 0)
            break;

        // Warn if no devices were found using the default backend list
        if (backendList == nullptr)