1 /* 2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 12 #include "segmentation.h" 13 #include "vpx_mem/vpx_mem.h" 14 15 void vp8_update_gf_useage_maps(VP8_COMP *cpi, VP8_COMMON *cm, MACROBLOCK *x) 16 { 17 int mb_row, mb_col; 18 19 MODE_INFO *this_mb_mode_info = cm->mi; 20 21 x->gf_active_ptr = (signed char *)cpi->gf_active_flags; 22 23 if ((cm->frame_type == KEY_FRAME) || (cm->refresh_golden_frame)) 24 { 25 // Reset Gf useage monitors 26 vpx_memset(cpi->gf_active_flags, 1, (cm->mb_rows * cm->mb_cols)); 27 cpi->gf_active_count = cm->mb_rows * cm->mb_cols; 28 } 29 else 30 { 31 // for each macroblock row in image 32 for (mb_row = 0; mb_row < cm->mb_rows; mb_row++) 33 { 34 // for each macroblock col in image 35 for (mb_col = 0; mb_col < cm->mb_cols; mb_col++) 36 { 37 38 // If using golden then set GF active flag if not already set. 39 // If using last frame 0,0 mode then leave flag as it is 40 // else if using non 0,0 motion or intra modes then clear flag if it is currently set 41 if ((this_mb_mode_info->mbmi.ref_frame == GOLDEN_FRAME) || (this_mb_mode_info->mbmi.ref_frame == ALTREF_FRAME)) 42 { 43 if (*(x->gf_active_ptr) == 0) 44 { 45 *(x->gf_active_ptr) = 1; 46 cpi->gf_active_count ++; 47 } 48 } 49 else if ((this_mb_mode_info->mbmi.mode != ZEROMV) && *(x->gf_active_ptr)) 50 { 51 *(x->gf_active_ptr) = 0; 52 cpi->gf_active_count--; 53 } 54 55 x->gf_active_ptr++; // Step onto next entry 56 this_mb_mode_info++; // skip to next mb 57 58 } 59 60 // this is to account for the border 61 this_mb_mode_info++; 62 } 63 } 64 } 65
