Error codes

#define NRRETCODE(x) (x & 0x000000FF)

#define CORERETCODE(x) ((x >> 8) & 0x000000FF)

#define FBRETCODE(x) ((x >> 16) & 0x000000FF)

#define RERETCODE(x) ((x >> 24) & 0x000000FF)

int result = PFC_AutoCorrect(&image, &thumbnail, param);

if (result < 0) {
    // Error occurred
    switch (result) {
        case APPLY_ERROR_PROFILE_MISSING:
            printf("Error: Profile is NULL\n");
            break;
        case APPLY_NOSOURCE:
            printf("Error: Source image is NULL\n");
            break;
        case APPLY_BADFORMAT:
            printf("Error: Unsupported pixel format\n");
            break;
        case APPLY_INVALIDLICENSE:
            printf("Error: Invalid license\n");
            break;
        default:
            printf("Error code: %d\n", result);
    }
} else if (result > 0) {
    // Warnings - some features may not have been applied
    PFCNR_STATUS nrStatus = NRRETCODE(result);
    PFCCORE_STATUS coreStatus = CORERETCODE(result);
    PFCFB_STATUS fbStatus = FBRETCODE(result);
    PFCRE_STATUS reStatus = RERETCODE(result);
    
    if (coreStatus != PFC_CORE_SUCCESS) {
        printf("Core warning: %d\n", coreStatus);
    }
    if (fbStatus != PFC_FB_SUCCESS) {
        printf("Face Beautification warning: %d\n", fbStatus);
    }
} else {
    // result == 0: Complete success
    printf("Correction applied successfully\n");
}