/* * 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.
*/
if ((cm->frame_type == KEY_FRAME) || (cm->refresh_golden_frame)) { /* Reset Gf usage 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++;
}
} elseif ((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++;
}
}
}
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