get_region_data()

std::vector< DataVariant > MayaFlux::Kakshya::VideoStreamContainer::get_region_data ( const Region &  region ) const

overridevirtual

Get data for a specific region.

Parameters

region

The region to extract data from

Returns

std::vector<DataVariant> containing the region's data

Implements MayaFlux::Kakshya::NDDataContainer.

Definition at line 296 of file VideoStreamContainer.cpp.

{
    std::optional<std::vector<DataVariant>> result;
    seqlock_read_void(m_data_lock, 8, [&] {
        if (m_data.empty())
            return;
 
        auto [ptr, bytes] = variant_bytes(m_data[0]);
        if (!ptr || bytes == 0)
            return;
 
        const size_t element_size = storage_element_size(m_format);
 
        try {
            if (element_size == 2) {
                const std::span<const uint16_t> src {
                    reinterpret_cast<const uint16_t*>(ptr), bytes / sizeof(uint16_t)
                };
                result = { extract_nd_region<uint16_t>(src, region, m_structure.dimensions) };
            } else if (element_size == 4) {
                const std::span<const float> src {
                    reinterpret_cast<const float*>(ptr), bytes / sizeof(float)
                };
                result = { extract_nd_region<float>(src, region, m_structure.dimensions) };
            } else {
                const std::span<const uint8_t> src { ptr, bytes };
                result = { extract_nd_region<uint8_t>(src, region, m_structure.dimensions) };
            }
        } catch (const std::exception& e) {
            MF_WARN(Journal::Component::Kakshya, Journal::Context::ContainerProcessing,
                "VideoStreamContainer::get_region_data extraction failed: {}", e.what());
        }
    });
 
    return result.value_or(std::vector<DataVariant> {});
}

References MayaFlux::Journal::ContainerProcessing, MayaFlux::Kakshya::ContainerDataStructure::dimensions, MayaFlux::Journal::Kakshya, m_data, m_data_lock, m_format, m_structure, MF_WARN, ptr, MayaFlux::Kakshya::storage_element_size(), and MayaFlux::Kakshya::variant_bytes().

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