int dct_quantize_c(MpegEncContext *s, DCTELEM *block, int n, int qscale, int *overflow);
int dct_quantize_trellis_c(MpegEncContext *s, DCTELEM *block, int n, int qscale, int *overflow);
void denoise_dct_c(MpegEncContext *s, DCTELEM *block);
-void copy_picture(Picture *dst, Picture *src);
/**
* allocates a Picture