- * @param lut_in Input Gamma LUT to use.
- * @param lut_out Output Gamma LUT to use.
- * @param buffer Buffer to write RGB data to; will be written
- * as one byte R, one byte G, one byte B, one byte R etc. with
- * no padding at line ends.
+ * @param conversion Colour conversion to use.
+ * @param buffer Buffer to write RGB data to; rgb will be packed RGB
+ * 16:16:16, 48bpp, 16R, 16G, 16B, with the 2-byte value for each
+ * R/G/B component stored as little-endian; i.e. AV_PIX_FMT_RGB48LE.