111 lines
3.8 KiB
C
111 lines
3.8 KiB
C
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <assert.h>
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#include "vp9/common/vp9_blockd.h"
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#include "vp9/common/vp9_seg_common.h"
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static const int seg_feature_data_signed[SEG_LVL_MAX] = { 1, 1, 0, 0 };
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static const int seg_feature_data_max[SEG_LVL_MAX] = { MAXQ, 63, 15, 15 };
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// These functions provide access to new segment level features.
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// Eventually these function may be "optimized out" but for the moment,
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// the coding mechanism is still subject to change so these provide a
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// convenient single point of change.
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int vp9_segfeature_active(const MACROBLOCKD *xd, int segment_id,
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SEG_LVL_FEATURES feature_id) {
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return xd->segmentation_enabled &&
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(xd->segment_feature_mask[segment_id] & (1 << feature_id));
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}
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void vp9_clearall_segfeatures(MACROBLOCKD *xd) {
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vpx_memset(xd->segment_feature_data, 0, sizeof(xd->segment_feature_data));
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vpx_memset(xd->segment_feature_mask, 0, sizeof(xd->segment_feature_mask));
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}
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void vp9_enable_segfeature(MACROBLOCKD *xd, int segment_id,
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SEG_LVL_FEATURES feature_id) {
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xd->segment_feature_mask[segment_id] |= 1 << feature_id;
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}
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void vp9_disable_segfeature(MACROBLOCKD *xd, int segment_id,
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SEG_LVL_FEATURES feature_id) {
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xd->segment_feature_mask[segment_id] &= ~(1 << feature_id);
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}
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int vp9_seg_feature_data_max(SEG_LVL_FEATURES feature_id) {
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return seg_feature_data_max[feature_id];
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}
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int vp9_is_segfeature_signed(SEG_LVL_FEATURES feature_id) {
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return seg_feature_data_signed[feature_id];
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}
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void vp9_clear_segdata(MACROBLOCKD *xd, int segment_id,
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SEG_LVL_FEATURES feature_id) {
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xd->segment_feature_data[segment_id][feature_id] = 0;
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}
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void vp9_set_segdata(MACROBLOCKD *xd, int segment_id,
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SEG_LVL_FEATURES feature_id, int seg_data) {
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assert(seg_data <= seg_feature_data_max[feature_id]);
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if (seg_data < 0) {
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assert(seg_feature_data_signed[feature_id]);
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assert(-seg_data <= seg_feature_data_max[feature_id]);
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}
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xd->segment_feature_data[segment_id][feature_id] = seg_data;
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}
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int vp9_get_segdata(const MACROBLOCKD *xd, int segment_id,
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SEG_LVL_FEATURES feature_id) {
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return xd->segment_feature_data[segment_id][feature_id];
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}
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void vp9_clear_segref(MACROBLOCKD *xd, int segment_id) {
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xd->segment_feature_data[segment_id][SEG_LVL_REF_FRAME] = 0;
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}
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void vp9_set_segref(MACROBLOCKD *xd, int segment_id,
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MV_REFERENCE_FRAME ref_frame) {
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xd->segment_feature_data[segment_id][SEG_LVL_REF_FRAME] |= 1 << ref_frame;
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}
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int vp9_check_segref(const MACROBLOCKD *xd, int segment_id,
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MV_REFERENCE_FRAME ref_frame) {
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return (xd->segment_feature_data[segment_id][SEG_LVL_REF_FRAME] &
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(1 << ref_frame)) ? 1 : 0;
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}
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#if CONFIG_IMPLICIT_SEGMENTATION
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// This function defines an implicit segmentation for the next frame based
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// on predcition and transform decisions in the current frame.
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// For test purposes at the moment only TX size is used.
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void vp9_implicit_segment_map_update(VP9_COMMON * cm) {
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int row, col;
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MODE_INFO *mi, *mi_ptr = cm->mi;
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unsigned char * map_ptr = cm->last_frame_seg_map;
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for (row = 0; row < cm->mb_rows; row++) {
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mi = mi_ptr;
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// Experimental use of tx size to define implicit segmentation
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for (col = 0; col < cm->mb_cols; ++col, ++mi) {
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map_ptr[col] = mi->mbmi.txfm_size;
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}
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mi_ptr += cm->mode_info_stride;
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map_ptr += cm->mb_cols;
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}
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}
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#endif
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// TBD? Functions to read and write segment data with range / validity checking
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