+#ifdef CONFIG_SNOW_ENCODER
+int w53_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h);
+int w97_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h);
+#else
+static int w53_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h) {assert (0);}
+static int w97_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h) {assert (0);}
+#endif
+
+/* C bits used by mmx/sse2/altivec */
+
+static av_always_inline void snow_interleave_line_header(int * i, int width, DWTELEM * low, DWTELEM * high){
+ (*i) = (width) - 2;
+
+ if (width & 1){
+ low[(*i)+1] = low[((*i)+1)>>1];
+ (*i)--;
+ }
+}
+
+static av_always_inline void snow_interleave_line_footer(int * i, DWTELEM * low, DWTELEM * high){
+ for (; (*i)>=0; (*i)-=2){
+ low[(*i)+1] = high[(*i)>>1];
+ low[*i] = low[(*i)>>1];
+ }
+}
+
+static av_always_inline void snow_horizontal_compose_lift_lead_out(int i, DWTELEM * dst, DWTELEM * src, DWTELEM * ref, int width, int w, int lift_high, int mul, int add, int shift){
+ for(; i<w; i++){
+ dst[i] = src[i] - ((mul * (ref[i] + ref[i + 1]) + add) >> shift);
+ }
+
+ if((width^lift_high)&1){
+ dst[w] = src[w] - ((mul * 2 * ref[w] + add) >> shift);
+ }
+}
+
+static av_always_inline void snow_horizontal_compose_liftS_lead_out(int i, DWTELEM * dst, DWTELEM * src, DWTELEM * ref, int width, int w){
+ for(; i<w; i++){
+ dst[i] = src[i] - (((-(ref[i] + ref[(i+1)])+W_BO) - 4 * src[i]) >> W_BS);
+ }
+
+ if(width&1){
+ dst[w] = src[w] - (((-2 * ref[w] + W_BO) - 4 * src[w]) >> W_BS);
+ }
+}
+