/**
 * Perform full chroma upsampling when converting to RGB as part of scaling.
 *
 * For example, when converting 50x50 yuv420p to 100x100 rgba, setting this flag
 * will scale the chroma plane from 25x25 to 100x100 (4:4:4), and then convert
 * the 100x100 yuv444p image to rgba in the final output step.
 *
 * Without this flag, the chroma plane is instead scaled to 50x100 (4:2:2),
 * with a single chroma sample being re-used for both horizontally adjacent RGBA
 * output pixels.
 */
#define SWS_FULL_CHR_H_INT    0x2000

/**
 * Perform full chroma interpolation when downscaling RGB sources.
 *
 * For example, when converting a 100x100 rgba source to 50x50 yuv444p, setting
 * this flag will generate a 100x100 (4:4:4) chroma plane, which is then
 * downscaled to the required 50x50.
 *
 * Without this flag, the chroma plane is instead generated at 50x100 (dropping
 * every other pixel), before then being downscaled to the required 50x50
 * resolution.
 */
#define SWS_FULL_CHR_H_INP    0x4000