getLaneByte()

u8 fl::SPITransposer::getLaneByte ( const LaneData & lane, size_t byte_idx, size_t max_size )

staticprivate

Get byte from lane at given index, handling padding automatically.

Examples

/home/runner/work/FastLED/FastLED/src/fl/math/transposition.h.

Definition at line 301 of file transposition.cpp.hpp.

                                                                                                 {
    // Calculate padding needed for this lane
    const size_t lane_size = lane.payload.size();
    const size_t padding_bytes = max_size - lane_size;
 
    // If we're in the padding region (prepended to beginning)
    if (byte_idx < padding_bytes) {
        // Return padding frame byte (repeating pattern)
        if (!lane.padding_frame.empty()) {
            return lane.padding_frame[byte_idx % lane.padding_frame.size()];
        }
        return 0x00;  // Fallback to zero
    }
 
    // We're in the data region
    const size_t data_idx = byte_idx - padding_bytes;
    if (data_idx < lane_size) {
        return lane.payload[data_idx];
    }
 
    // Should never reach here if max_size is correct
    return 0x00;
}

References fl::FL_NO_EXCEPT.

Referenced by transpose16(), transpose2(), transpose4(), and transpose8().

Here is the caller graph for this function: