| /* |
| * Copyright (c) 2010 The WebM 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.h" |
| #include "vpx_mem/vpx_mem.h" |
| |
| void vp8_update_gf_useage_maps(VP8_COMP *cpi, VP8_COMMON *cm, MACROBLOCK *x) |
| { |
| int mb_row, mb_col; |
| |
| MODE_INFO *this_mb_mode_info = cm->mi; |
| |
| x->gf_active_ptr = (signed char *)cpi->gf_active_flags; |
| |
| if ((cm->frame_type == KEY_FRAME) || (cm->refresh_golden_frame)) |
| { |
| // Reset Gf useage monitors |
| vpx_memset(cpi->gf_active_flags, 1, (cm->mb_rows * cm->mb_cols)); |
| cpi->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 (*(x->gf_active_ptr) == 0) |
| { |
| *(x->gf_active_ptr) = 1; |
| cpi->gf_active_count ++; |
| } |
| } |
| else if ((this_mb_mode_info->mbmi.mode != ZEROMV) && *(x->gf_active_ptr)) |
| { |
| *(x->gf_active_ptr) = 0; |
| cpi->gf_active_count--; |
| } |
| |
| x->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++; |
| } |
| } |
| } |
