ref: 00d566eae1591078ecbadcaf67e30b2778c06b4e
dir: /vp8/common/segmentation_common.c/
/* * Copyright (c) 2010 The VP8 project authors. All Rights Reserved. * * Use of this source code is governed by a BSD-style license * that can be found in the LICENSE file in the root of the source * tree. An additional intellectual property rights grant can be found * in the file PATENTS. All contributing project authors may * be found in the AUTHORS file in the root of the source tree. */ #include "segmentation_common.h" #include "vpx_mem/vpx_mem.h" void vp8_update_gf_useage_maps(VP8_COMMON *cm, MACROBLOCKD *xd) { int mb_row, mb_col; MODE_INFO *this_mb_mode_info = cm->mi; xd->gf_active_ptr = (signed char *)cm->gf_active_flags; if ((cm->frame_type == KEY_FRAME) || (cm->refresh_golden_frame)) { // Reset Gf useage monitors vpx_memset(cm->gf_active_flags, 1, (cm->mb_rows * cm->mb_cols)); cm->gf_active_count = cm->mb_rows * cm->mb_cols; } else { // for each macroblock row in image for (mb_row = 0; mb_row < cm->mb_rows; mb_row++) { // for each macroblock col in image for (mb_col = 0; mb_col < cm->mb_cols; mb_col++) { // If using golden then set GF active flag if not already set. // If using last frame 0,0 mode then leave flag as it is // else if using non 0,0 motion or intra modes then clear flag if it is currently set if ((this_mb_mode_info->mbmi.ref_frame == GOLDEN_FRAME) || (this_mb_mode_info->mbmi.ref_frame == ALTREF_FRAME)) { if (*(xd->gf_active_ptr) == 0) { *(xd->gf_active_ptr) = 1; cm->gf_active_count ++; } } else if ((this_mb_mode_info->mbmi.mode != ZEROMV) && *(xd->gf_active_ptr)) { *(xd->gf_active_ptr) = 0; cm->gf_active_count--; } xd->gf_active_ptr++; // Step onto next entry this_mb_mode_info++; // skip to next mb } // this is to account for the border this_mb_mode_info++; } } }