void ff_ivi_recompose53(const IVIPlaneDesc *plane, uint8_t *dst, const int dst_pitch, const int num_bands) { int x, y, indx; int32_t p0, p1, p2, p3, tmp0, tmp1, tmp2; int32_t b0_1, b0_2, b1_1, b1_2, b1_3, b2_1, b2_2, b2_3, b2_4, b2_5, b2_6; int32_t b3_1, b3_2, b3_3, b3_4, b3_5, b3_6, b3_7, b3_8, b3_9; int32_t pitch, back_pitch; const IDWTELEM *b0_ptr, *b1_ptr, *b2_ptr, *b3_ptr; /* all bands should have the same pitch */ pitch = plane->bands[0].pitch; /* pixels at the position "y-1" will be set to pixels at the "y" for the 1st iteration */ back_pitch = 0; /* get pointers to the wavelet bands */ b0_ptr = plane->bands[0].buf; b1_ptr = plane->bands[1].buf; b2_ptr = plane->bands[2].buf; b3_ptr = plane->bands[3].buf; for (y = 0; y < plane->height; y += 2) { /* load storage variables with values */ if (num_bands > 0) { b0_1 = b0_ptr[0]; b0_2 = b0_ptr[pitch]; } if (num_bands > 1) { b1_1 = b1_ptr[back_pitch]; b1_2 = b1_ptr[0]; b1_3 = b1_1 - b1_2*6 + b1_ptr[pitch]; } if (num_bands > 2) { b2_2 = b2_ptr[0]; // b2[x, y ] b2_3 = b2_2; // b2[x+1,y ] = b2[x,y] b2_5 = b2_ptr[pitch]; // b2[x ,y+1] b2_6 = b2_5; // b2[x+1,y+1] = b2[x,y+1] } if (num_bands > 3) { b3_2 = b3_ptr[back_pitch]; // b3[x ,y-1] b3_3 = b3_2; // b3[x+1,y-1] = b3[x ,y-1] b3_5 = b3_ptr[0]; // b3[x ,y ] b3_6 = b3_5; // b3[x+1,y ] = b3[x ,y ] b3_8 = b3_2 - b3_5*6 + b3_ptr[pitch]; b3_9 = b3_8; } for (x = 0, indx = 0; x < plane->width; x+=2, indx++) { /* some values calculated in the previous iterations can */ /* be reused in the next ones, so do appropriate copying */ b2_1 = b2_2; // b2[x-1,y ] = b2[x, y ] b2_2 = b2_3; // b2[x ,y ] = b2[x+1,y ] b2_4 = b2_5; // b2[x-1,y+1] = b2[x ,y+1] b2_5 = b2_6; // b2[x ,y+1] = b2[x+1,y+1] b3_1 = b3_2; // b3[x-1,y-1] = b3[x ,y-1] b3_2 = b3_3; // b3[x ,y-1] = b3[x+1,y-1] b3_4 = b3_5; // b3[x-1,y ] = b3[x ,y ] b3_5 = b3_6; // b3[x ,y ] = b3[x+1,y ] b3_7 = b3_8; // vert_HPF(x-1) b3_8 = b3_9; // vert_HPF(x ) p0 = p1 = p2 = p3 = 0; /* process the LL-band by applying LPF both vertically and horizontally */ if (num_bands > 0) { tmp0 = b0_1; tmp2 = b0_2; b0_1 = b0_ptr[indx+1]; b0_2 = b0_ptr[pitch+indx+1]; tmp1 = tmp0 + b0_1; p0 = tmp0 << 4; p1 = tmp1 << 3; p2 = (tmp0 + tmp2) << 3; p3 = (tmp1 + tmp2 + b0_2) << 2; } /* process the HL-band by applying HPF vertically and LPF horizontally */ if (num_bands > 1) { tmp0 = b1_2; tmp1 = b1_1; b1_2 = b1_ptr[indx+1]; b1_1 = b1_ptr[back_pitch+indx+1]; tmp2 = tmp1 - tmp0*6 + b1_3; b1_3 = b1_1 - b1_2*6 + b1_ptr[pitch+indx+1]; p0 += (tmp0 + tmp1) << 3; p1 += (tmp0 + tmp1 + b1_1 + b1_2) << 2; p2 += tmp2 << 2; p3 += (tmp2 + b1_3) << 1; } /* process the LH-band by applying LPF vertically and HPF horizontally */ if (num_bands > 2) { b2_3 = b2_ptr[indx+1]; b2_6 = b2_ptr[pitch+indx+1]; tmp0 = b2_1 + b2_2; tmp1 = b2_1 - b2_2*6 + b2_3; p0 += tmp0 << 3; p1 += tmp1 << 2; p2 += (tmp0 + b2_4 + b2_5) << 2; p3 += (tmp1 + b2_4 - b2_5*6 + b2_6) << 1; } /* process the HH-band by applying HPF both vertically and horizontally */ if (num_bands > 3) { b3_6 = b3_ptr[indx+1]; // b3[x+1,y ] b3_3 = b3_ptr[back_pitch+indx+1]; // b3[x+1,y-1] tmp0 = b3_1 + b3_4; tmp1 = b3_2 + b3_5; tmp2 = b3_3 + b3_6; b3_9 = b3_3 - b3_6*6 + b3_ptr[pitch+indx+1]; p0 += (tmp0 + tmp1) << 2; p1 += (tmp0 - tmp1*6 + tmp2) << 1; p2 += (b3_7 + b3_8) << 1; p3 += b3_7 - b3_8*6 + b3_9; } /* output four pixels */ dst[x] = av_clip_uint8((p0 >> 6) + 128); dst[x+1] = av_clip_uint8((p1 >> 6) + 128); dst[dst_pitch+x] = av_clip_uint8((p2 >> 6) + 128); dst[dst_pitch+x+1] = av_clip_uint8((p3 >> 6) + 128); }// for x dst += dst_pitch << 1; back_pitch = -pitch; b0_ptr += pitch; b1_ptr += pitch; b2_ptr += pitch; b3_ptr += pitch; } }
void ff_ivi_recompose53(const IVIPlaneDesc *plane, uint8_t *dst, const int dst_pitch, const int num_bands) { int x, y, indx; int32_t p0, p1, p2, p3, tmp0, tmp1, tmp2; int32_t b0_1, b0_2, b1_1, b1_2, b1_3, b2_1, b2_2, b2_3, b2_4, b2_5, b2_6; int32_t b3_1, b3_2, b3_3, b3_4, b3_5, b3_6, b3_7, b3_8, b3_9; int32_t pitch, back_pitch; const IDWTELEM *b0_ptr, *b1_ptr, *b2_ptr, *b3_ptr;   pitch = plane->bands[0].pitch;   back_pitch = 0;   b0_ptr = plane->bands[0].buf; b1_ptr = plane->bands[1].buf; b2_ptr = plane->bands[2].buf; b3_ptr = plane->bands[3].buf; for (y = 0; y < plane->height; y += 2) {   if (num_bands > 0) { b0_1 = b0_ptr[0]; b0_2 = b0_ptr[pitch]; } if (num_bands > 1) { b1_1 = b1_ptr[back_pitch]; b1_2 = b1_ptr[0]; b1_3 = b1_1 - b1_2*6 + b1_ptr[pitch]; } if (num_bands > 2) { b2_2 = b2_ptr[0];  