ref: 6f3172295052d485dd633ac1218d64b9c2b01f3a
dir: /vp8/encoder/segmentation.c/
/*
* 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 */
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++;
}
}
}