static int sse(MpegEncContext *s, uint8_t *src1, uint8_t *src2, int w, int h, int stride)
void(* synth_filter_float)(FFTContext *imdct, float *synth_buf_ptr, int *synth_buf_offset, float synth_buf2[32], const float window[512], float out[32], const float in[32], float scale)