/************************************************************************** * * XVID MPEG-4 VIDEO CODEC * sum of absolute difference * * 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., 675 Mass Ave, Cambridge, MA 02139, USA. * *************************************************************************/ /************************************************************************** * * History: * * 14.02.2002 added sad16bi_c() * 10.11.2001 initial version; (c)2001 peter ross * *************************************************************************/ #include "../portab.h" #include "../global.h" #include "sad.h" sad16FuncPtr sad16; sad8FuncPtr sad8; sad16biFuncPtr sad16bi; sad8biFuncPtr sad8bi; // not really sad16, but no difference in prototype dev16FuncPtr dev16; sad16vFuncPtr sad16v; sadInitFuncPtr sadInit; uint32_t sad16_c(const uint8_t * const cur, const uint8_t * const ref, const uint32_t stride, const uint32_t best_sad) { uint32_t sad = 0; uint32_t j; uint8_t const *ptr_cur = cur; uint8_t const *ptr_ref = ref; for (j = 0; j < 16; j++) { sad += ABS(ptr_cur[0] - ptr_ref[0]); sad += ABS(ptr_cur[1] - ptr_ref[1]); sad += ABS(ptr_cur[2] - ptr_ref[2]); sad += ABS(ptr_cur[3] - ptr_ref[3]); sad += ABS(ptr_cur[4] - ptr_ref[4]); sad += ABS(ptr_cur[5] - ptr_ref[5]); sad += ABS(ptr_cur[6] - ptr_ref[6]); sad += ABS(ptr_cur[7] - ptr_ref[7]); sad += ABS(ptr_cur[8] - ptr_ref[8]); sad += ABS(ptr_cur[9] - ptr_ref[9]); sad += ABS(ptr_cur[10] - ptr_ref[10]); sad += ABS(ptr_cur[11] - ptr_ref[11]); sad += ABS(ptr_cur[12] - ptr_ref[12]); sad += ABS(ptr_cur[13] - ptr_ref[13]); sad += ABS(ptr_cur[14] - ptr_ref[14]); sad += ABS(ptr_cur[15] - ptr_ref[15]); if (sad >= best_sad) return sad; ptr_cur += stride; ptr_ref += stride; } return sad; } uint32_t sad16bi_c(const uint8_t * const cur, const uint8_t * const ref1, const uint8_t * const ref2, const uint32_t stride) { uint32_t sad = 0; uint32_t i, j; uint8_t const *ptr_cur = cur; uint8_t const *ptr_ref1 = ref1; uint8_t const *ptr_ref2 = ref2; for (j = 0; j < 16; j++) { for (i = 0; i < 16; i++) { int pixel = (ptr_ref1[i] + ptr_ref2[i] + 1) / 2; if (pixel < 0) { pixel = 0; } else if (pixel > 255) { pixel = 255; } sad += ABS(ptr_cur[i] - pixel); } ptr_cur += stride; ptr_ref1 += stride; ptr_ref2 += stride; } return sad; } uint32_t sad8bi_c(const uint8_t * const cur, const uint8_t * const ref1, const uint8_t * const ref2, const uint32_t stride) { uint32_t sad = 0; uint32_t i, j; uint8_t const *ptr_cur = cur; uint8_t const *ptr_ref1 = ref1; uint8_t const *ptr_ref2 = ref2; for (j = 0; j < 8; j++) { for (i = 0; i < 8; i++) { int pixel = (ptr_ref1[i] + ptr_ref2[i] + 1) / 2; if (pixel < 0) { pixel = 0; } else if (pixel > 255) { pixel = 255; } sad += ABS(ptr_cur[i] - pixel); } ptr_cur += stride; ptr_ref1 += stride; ptr_ref2 += stride; } return sad; } uint32_t sad8_c(const uint8_t * const cur, const uint8_t * const ref, const uint32_t stride) { uint32_t sad = 0; uint32_t j; uint8_t const *ptr_cur = cur; uint8_t const *ptr_ref = ref; for (j = 0; j < 8; j++) { sad += ABS(ptr_cur[0] - ptr_ref[0]); sad += ABS(ptr_cur[1] - ptr_ref[1]); sad += ABS(ptr_cur[2] - ptr_ref[2]); sad += ABS(ptr_cur[3] - ptr_ref[3]); sad += ABS(ptr_cur[4] - ptr_ref[4]); sad += ABS(ptr_cur[5] - ptr_ref[5]); sad += ABS(ptr_cur[6] - ptr_ref[6]); sad += ABS(ptr_cur[7] - ptr_ref[7]); ptr_cur += stride; ptr_ref += stride; } return sad; } /* average deviation from mean */ uint32_t dev16_c(const uint8_t * const cur, const uint32_t stride) { uint32_t mean = 0; uint32_t dev = 0; uint32_t i, j; uint8_t const *ptr_cur = cur; for (j = 0; j < 16; j++) { for (i = 0; i < 16; i++) mean += *(ptr_cur + i); ptr_cur += stride; } mean /= (16 * 16); ptr_cur = cur; for (j = 0; j < 16; j++) { for (i = 0; i < 16; i++) dev += ABS(*(ptr_cur + i) - (int32_t) mean); ptr_cur += stride; } return dev; } uint32_t sad16v_c(const uint8_t * const cur, const uint8_t * const ref, const uint32_t stride, int32_t *sad) { sad[0] = sad8(cur, ref, stride); sad[1] = sad8(cur + 8, ref + 8, stride); sad[2] = sad8(cur + 8*stride, ref + 8*stride, stride); sad[3] = sad8(cur + 8*stride + 8, ref + 8*stride + 8, stride); return sad[0]+sad[1]+sad[2]+sad[3]; } uint32_t sad32v_c(const uint8_t * const cur, const uint8_t * const ref, const uint32_t stride, int32_t *sad) { sad[0] = sad16(cur, ref, stride, 256*4096); sad[1] = sad16(cur + 8, ref + 8, stride, 256*4096); sad[2] = sad16(cur + 8*stride, ref + 8*stride, stride, 256*4096); sad[3] = sad16(cur + 8*stride + 8, ref + 8*stride + 8, stride, 256*4096); return sad[0]+sad[1]+sad[2]+sad[3]; } #define MRSAD16_CORRFACTOR 8 uint32_t mrsad16_c(const uint8_t * const cur, const uint8_t * const ref, const uint32_t stride, const uint32_t best_sad) { uint32_t sad = 0; int32_t mean = 0; uint32_t i, j; uint8_t const *ptr_cur = cur; uint8_t const *ptr_ref = ref; for (j = 0; j < 16; j++) { for (i = 0; i < 16; i++) { mean += ((int) *(ptr_cur + i) - (int) *(ptr_ref + i)); } ptr_cur += stride; ptr_ref += stride; } mean /= 256; for (j = 0; j < 16; j++) { ptr_cur -= stride; ptr_ref -= stride; for (i = 0; i < 16; i++) { sad += ABS(*(ptr_cur + i) - *(ptr_ref + i) - mean); if (sad >= best_sad) { return MRSAD16_CORRFACTOR * sad; } } } return MRSAD16_CORRFACTOR * sad; }