a1f15814be
Not all segment feature data elements are full-range powers of two, so there are values that can be encoded that are invalid. Add a new function to clamp values to the maximum allowed. Change-Id: Ie47cb80ef2d54292e6b8db9f699c57214a915bc4
113 lines
3.9 KiB
C
113 lines
3.9 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 segfeaturedata_signed[SEG_LVL_MAX] = { 1, 1, 0, 0, 0, 0 };
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static const int seg_feature_data_max[SEG_LVL_MAX] =
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{ MAXQ, 63, 0xf, MB_MODE_COUNT - 1, 255, TX_SIZE_MAX - 1};
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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,
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int segment_id,
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SEG_LVL_FEATURES feature_id) {
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// Return true if mask bit set and segmentation enabled.
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return (xd->segmentation_enabled &&
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(xd->segment_feature_mask[segment_id] &
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(0x01 << 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,
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int segment_id,
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SEG_LVL_FEATURES feature_id) {
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xd->segment_feature_mask[segment_id] |= (0x01 << feature_id);
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}
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void vp9_disable_segfeature(MACROBLOCKD *xd,
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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 (segfeaturedata_signed[feature_id]);
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}
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void vp9_clear_segdata(MACROBLOCKD *xd,
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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,
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int segment_id,
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SEG_LVL_FEATURES feature_id,
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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(segfeaturedata_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,
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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,
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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] |=
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(1 << ref_frame);
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}
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int vp9_check_segref(const MACROBLOCKD *xd,
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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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int vp9_check_segref_inter(MACROBLOCKD *xd, int segment_id) {
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return (xd->segment_feature_data[segment_id][SEG_LVL_REF_FRAME] &
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~(1 << INTRA_FRAME)) ? 1 : 0;
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}
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int vp9_get_seg_tx_type(MACROBLOCKD *xd, int segment_id) {
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if (vp9_segfeature_active(xd, segment_id, SEG_LVL_TRANSFORM))
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return vp9_get_segdata(xd, segment_id, SEG_LVL_TRANSFORM);
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else
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return TX_4X4;
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}
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// TBD? Functions to read and write segment data with range / validity checking
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