-
-/**
- * @name RV30/40 inverse transform functions
- * @{
- */
-
-static av_always_inline void rv34_row_transform(int temp[16], DCTELEM *block)
-{
- int i;
-
- for(i = 0; i < 4; i++){
- const int z0 = 13*(block[i+8*0] + block[i+8*2]);
- const int z1 = 13*(block[i+8*0] - block[i+8*2]);
- const int z2 = 7* block[i+8*1] - 17*block[i+8*3];
- const int z3 = 17* block[i+8*1] + 7*block[i+8*3];
-
- temp[4*i+0] = z0 + z3;
- temp[4*i+1] = z1 + z2;
- temp[4*i+2] = z1 - z2;
- temp[4*i+3] = z0 - z3;
- }
-}
-
-/**
- * Real Video 3.0/4.0 inverse transform
- * Code is almost the same as in SVQ3, only scaling is different.
- */
-static void rv34_inv_transform(DCTELEM *block){
- int temp[16];
- int i;
-
- rv34_row_transform(temp, block);
-
- for(i = 0; i < 4; i++){
- const int z0 = 13*(temp[4*0+i] + temp[4*2+i]) + 0x200;
- const int z1 = 13*(temp[4*0+i] - temp[4*2+i]) + 0x200;
- const int z2 = 7* temp[4*1+i] - 17*temp[4*3+i];
- const int z3 = 17* temp[4*1+i] + 7*temp[4*3+i];
-
- block[i*8+0] = (z0 + z3) >> 10;
- block[i*8+1] = (z1 + z2) >> 10;
- block[i*8+2] = (z1 - z2) >> 10;
- block[i*8+3] = (z0 - z3) >> 10;
- }
-
-}
-
-/**
- * RealVideo 3.0/4.0 inverse transform for DC block
- *
- * Code is almost the same as rv34_inv_transform()
- * but final coefficients are multiplied by 1.5 and have no rounding.
- */
-static void rv34_inv_transform_noround(DCTELEM *block){
- int temp[16];
- int i;
-
- rv34_row_transform(temp, block);
-
- for(i = 0; i < 4; i++){
- const int z0 = 13*(temp[4*0+i] + temp[4*2+i]);
- const int z1 = 13*(temp[4*0+i] - temp[4*2+i]);
- const int z2 = 7* temp[4*1+i] - 17*temp[4*3+i];
- const int z3 = 17* temp[4*1+i] + 7*temp[4*3+i];
-
- block[i*8+0] = ((z0 + z3) * 3) >> 11;
- block[i*8+1] = ((z1 + z2) * 3) >> 11;
- block[i*8+2] = ((z1 - z2) * 3) >> 11;
- block[i*8+3] = ((z0 - z3) * 3) >> 11;
- }
-
-}
-
-/** @} */ // transform
-
-