get_frames_impl()

void MayaFlux::Kakshya::VideoStreamContainer::get_frames_impl ( void *  output, size_t  count, uint64_t  start_frame, uint64_t  num_frames, const std::type_info &  type  ) const

overrideprotectedvirtual

Implementation-specific method to retrieve multiple frames.

Implementations write up to count * frame_size elements into output, starting from start_frame. The type parameter indicates the expected element type; implementations may choose to support or reject it based on their native data type, but must not write past the output buffer regardless.

Parameters

output	Pointer to caller-owned buffer for frame data
count	Number of frames to retrieve (output buffer size in frames)
start_frame	First frame index to retrieve
num_frames	Number of frames to retrieve
type	Type information for the expected element type (e.g. float, uint8_t)

Implements MayaFlux::Kakshya::NDDataContainer.

Definition at line 569 of file VideoStreamContainer.cpp.

{
    if (!output)
        return;
 
    const size_t element_size = storage_element_size(m_format);
 
    if (type == typeid(uint8_t) && element_size == 1) {
        get_frames_typed_as(std::span<uint8_t>(static_cast<uint8_t*>(output), count),
            start_frame, num_frames);
        return;
    }
    if (type == typeid(uint16_t) && element_size == 2) {
        get_frames_typed_as(std::span<uint16_t>(static_cast<uint16_t*>(output), count),
            start_frame, num_frames);
        return;
    }
    if (type == typeid(float) && element_size == 4) {
        get_frames_typed_as(std::span<float>(static_cast<float*>(output), count),
            start_frame, num_frames);
        return;
    }
 
    error<std::runtime_error>(
        Journal::Component::Kakshya, Journal::Context::Runtime,
        std::source_location::current(),
        "VideoStreamContainer::get_frames_impl: requested type does not match storage");
}

References count, get_frames_typed_as(), MayaFlux::Journal::Kakshya, m_format, output, MayaFlux::Journal::Runtime, MayaFlux::Kakshya::storage_element_size(), and type.

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