s->idct_permutation_type= FF_NO_IDCT_PERM;
s->idct_permutation_type= FF_LIBMPEG2_IDCT_PERM;
void MPV_common_init_armv4l(MpegEncContext *s){    int i;    const int idct_algo= s->avctx->idct_algo;    ff_put_pixels_clamped = s->avctx->dsp.put_pixels_clamped;    ff_add_pixels_clamped = s->avctx->dsp.put_pixels_clamped;    if(idct_algo==FF_IDCT_AUTO || idct_algo==FF_IDCT_ARM){        s->idct_put= arm_idct_put;        s->idct_add= arm_idct_add;        s->idct_permutation_type= FF_NO_IDCT_PERM;    }}