wave3_transpose_2()

FASTLED_FORCE_INLINE FL_IRAM FL_OPTIMIZE_FUNCTION void fl::detail::wave3_transpose_2	(	const Wave3Byte	lane_waves[2],
		u8	output[2 *sizeof(Wave3Byte)] )

Transpose 2 lanes of Wave3Byte data into interleaved format.

Parameters

lane_waves	Array of 2 Wave3Byte structures
output	Output buffer (6 bytes = 2 * 3)

Definition at line 51 of file wave3.hpp.

                                                         {
    // Wave3 produces 3 symbols per LED byte (one byte per symbol for each lane).
    // For 2 lanes: interleave bits from both lanes into 2 bytes per symbol.
    // Each symbol byte has 8 bits. With 2 lanes we produce 2 bytes per symbol
    // using the same bit-spreading as wave8_transpose_2.
 
    for (int symbol_idx = 0; symbol_idx < 3; symbol_idx++) {
        u8 l0 = lane_waves[0].data[symbol_idx];
        u8 l1 = lane_waves[1].data[symbol_idx];
 
        // Interleave bits: for each bit position, lane0 goes to odd bits, lane1 to even bits
        u16 interleaved = 0;
        for (int bit = 0; bit < 8; bit++) {
            u16 b0 = (l0 >> bit) & 1;
            u16 b1 = (l1 >> bit) & 1;
            interleaved |= (b1 << (bit * 2));       // even positions
            interleaved |= (b0 << (bit * 2 + 1));   // odd positions
        }
 
        output[symbol_idx * 2] = (u8)(interleaved >> 8);
        output[symbol_idx * 2 + 1] = (u8)(interleaved & 0xFF);
    }
}

References fl::Wave3Byte::data.

Referenced by fl::wave3Transpose_2().

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