/***************************************************************************** * * XVID MPEG-4 VIDEO CODEC * - Motion Compensation module - * * Copyright(C) 2002 Michael Militzer * Copyright(C) 2002 Edouard Gomez * Copyright(C) 2002 Christoph Lampert * * This program is an implementation of a part of one or more MPEG-4 * Video tools as specified in ISO/IEC 14496-2 standard. Those intending * to use this software module in hardware or software products are * advised that its use may infringe existing patents or copyrights, and * any such use would be at such party's own risk. The original * developer of this software module and his/her company, and subsequent * editors and their companies, will have no liability for use of this * software or modifications or derivatives thereof. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * *************************************************************************/ #include "../encoder.h" #include "../utils/mbfunctions.h" #include "../image/interpolate8x8.h" #include "../utils/timer.h" #include "motion.h" #define ABS(X) (((X)>0)?(X):-(X)) #define SIGN(X) (((X)>0)?1:-1) static __inline void compensate8x8_halfpel(int16_t * const dct_codes, uint8_t * const cur, const uint8_t * const ref, const uint8_t * const refh, const uint8_t * const refv, const uint8_t * const refhv, const uint32_t x, const uint32_t y, const int32_t dx, const int dy, const uint32_t stride) { int32_t ddx, ddy; switch (((dx & 1) << 1) + (dy & 1)) // ((dx%2)?2:0)+((dy%2)?1:0) { case 0: ddx = dx / 2; ddy = dy / 2; transfer_8to16sub(dct_codes, cur + y * stride + x, ref + (int) ((y + ddy) * stride + x + ddx), stride); break; case 1: ddx = dx / 2; ddy = (dy - 1) / 2; transfer_8to16sub(dct_codes, cur + y * stride + x, refv + (int) ((y + ddy) * stride + x + ddx), stride); break; case 2: ddx = (dx - 1) / 2; ddy = dy / 2; transfer_8to16sub(dct_codes, cur + y * stride + x, refh + (int) ((y + ddy) * stride + x + ddx), stride); break; default: // case 3: ddx = (dx - 1) / 2; ddy = (dy - 1) / 2; transfer_8to16sub(dct_codes, cur + y * stride + x, refhv + (int) ((y + ddy) * stride + x + ddx), stride); break; } } void MBMotionCompensation(MACROBLOCK * const mb, const uint32_t i, const uint32_t j, const IMAGE * const ref, const IMAGE * const refh, const IMAGE * const refv, const IMAGE * const refhv, IMAGE * const cur, int16_t * dct_codes, const uint32_t width, const uint32_t height, const uint32_t edged_width, const uint32_t rounding) { static const uint32_t roundtab[16] = { 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2 }; if (mb->mode == MODE_INTER || mb->mode == MODE_INTER_Q) { int32_t dx = mb->mvs[0].x; int32_t dy = mb->mvs[0].y; compensate8x8_halfpel(&dct_codes[0 * 64], cur->y, ref->y, refh->y, refv->y, refhv->y, 16 * i, 16 * j, dx, dy, edged_width); compensate8x8_halfpel(&dct_codes[1 * 64], cur->y, ref->y, refh->y, refv->y, refhv->y, 16 * i + 8, 16 * j, dx, dy, edged_width); compensate8x8_halfpel(&dct_codes[2 * 64], cur->y, ref->y, refh->y, refv->y, refhv->y, 16 * i, 16 * j + 8, dx, dy, edged_width); compensate8x8_halfpel(&dct_codes[3 * 64], cur->y, ref->y, refh->y, refv->y, refhv->y, 16 * i + 8, 16 * j + 8, dx, dy, edged_width); dx = (dx & 3) ? (dx >> 1) | 1 : dx / 2; dy = (dy & 3) ? (dy >> 1) | 1 : dy / 2; /* uv-image-based compensation */ interpolate8x8_switch(refv->u, ref->u, 8 * i, 8 * j, dx, dy, edged_width / 2, rounding); transfer_8to16sub(&dct_codes[4 * 64], cur->u + 8 * j * edged_width / 2 + 8 * i, refv->u + 8 * j * edged_width / 2 + 8 * i, edged_width / 2); interpolate8x8_switch(refv->v, ref->v, 8 * i, 8 * j, dx, dy, edged_width / 2, rounding); transfer_8to16sub(&dct_codes[5 * 64], cur->v + 8 * j * edged_width / 2 + 8 * i, refv->v + 8 * j * edged_width / 2 + 8 * i, edged_width / 2); } else // mode == MODE_INTER4V { int32_t sum, dx, dy; compensate8x8_halfpel(&dct_codes[0 * 64], cur->y, ref->y, refh->y, refv->y, refhv->y, 16 * i, 16 * j, mb->mvs[0].x, mb->mvs[0].y, edged_width); compensate8x8_halfpel(&dct_codes[1 * 64], cur->y, ref->y, refh->y, refv->y, refhv->y, 16 * i + 8, 16 * j, mb->mvs[1].x, mb->mvs[1].y, edged_width); compensate8x8_halfpel(&dct_codes[2 * 64], cur->y, ref->y, refh->y, refv->y, refhv->y, 16 * i, 16 * j + 8, mb->mvs[2].x, mb->mvs[2].y, edged_width); compensate8x8_halfpel(&dct_codes[3 * 64], cur->y, ref->y, refh->y, refv->y, refhv->y, 16 * i + 8, 16 * j + 8, mb->mvs[3].x, mb->mvs[3].y, edged_width); sum = mb->mvs[0].x + mb->mvs[1].x + mb->mvs[2].x + mb->mvs[3].x; dx = (sum ? SIGN(sum) * (roundtab[ABS(sum) % 16] + (ABS(sum) / 16) * 2) : 0); sum = mb->mvs[0].y + mb->mvs[1].y + mb->mvs[2].y + mb->mvs[3].y; dy = (sum ? SIGN(sum) * (roundtab[ABS(sum) % 16] + (ABS(sum) / 16) * 2) : 0); /* uv-block-based compensation */ interpolate8x8_switch(refv->u, ref->u, 8 * i, 8 * j, dx, dy, edged_width / 2, rounding); transfer_8to16sub(&dct_codes[4 * 64], cur->u + 8 * j * edged_width / 2 + 8 * i, refv->u + 8 * j * edged_width / 2 + 8 * i, edged_width / 2); interpolate8x8_switch(refv->v, ref->v, 8 * i, 8 * j, dx, dy, edged_width / 2, rounding); transfer_8to16sub(&dct_codes[5 * 64], cur->v + 8 * j * edged_width / 2 + 8 * i, refv->v + 8 * j * edged_width / 2 + 8 * i, edged_width / 2); } }