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-rw-r--r--media/libvpx/vp9/common/vp9_seg_common.c75
1 files changed, 75 insertions, 0 deletions
diff --git a/media/libvpx/vp9/common/vp9_seg_common.c b/media/libvpx/vp9/common/vp9_seg_common.c
new file mode 100644
index 000000000..910200ecc
--- /dev/null
+++ b/media/libvpx/vp9/common/vp9_seg_common.c
@@ -0,0 +1,75 @@
+/*
+ * 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 <assert.h>
+
+#include "vp9/common/vp9_blockd.h"
+#include "vp9/common/vp9_loopfilter.h"
+#include "vp9/common/vp9_seg_common.h"
+#include "vp9/common/vp9_quant_common.h"
+
+static const int seg_feature_data_signed[SEG_LVL_MAX] = { 1, 1, 0, 0 };
+
+static const int seg_feature_data_max[SEG_LVL_MAX] = {
+ MAXQ, MAX_LOOP_FILTER, 3, 0 };
+
+// These functions provide access to new segment level features.
+// Eventually these function may be "optimized out" but for the moment,
+// the coding mechanism is still subject to change so these provide a
+// convenient single point of change.
+
+int vp9_segfeature_active(const struct segmentation *seg, int segment_id,
+ SEG_LVL_FEATURES feature_id) {
+ return seg->enabled &&
+ (seg->feature_mask[segment_id] & (1 << feature_id));
+}
+
+void vp9_clearall_segfeatures(struct segmentation *seg) {
+ vp9_zero(seg->feature_data);
+ vp9_zero(seg->feature_mask);
+}
+
+void vp9_enable_segfeature(struct segmentation *seg, int segment_id,
+ SEG_LVL_FEATURES feature_id) {
+ seg->feature_mask[segment_id] |= 1 << feature_id;
+}
+
+int vp9_seg_feature_data_max(SEG_LVL_FEATURES feature_id) {
+ return seg_feature_data_max[feature_id];
+}
+
+int vp9_is_segfeature_signed(SEG_LVL_FEATURES feature_id) {
+ return seg_feature_data_signed[feature_id];
+}
+
+void vp9_set_segdata(struct segmentation *seg, int segment_id,
+ SEG_LVL_FEATURES feature_id, int seg_data) {
+ assert(seg_data <= seg_feature_data_max[feature_id]);
+ if (seg_data < 0) {
+ assert(seg_feature_data_signed[feature_id]);
+ assert(-seg_data <= seg_feature_data_max[feature_id]);
+ }
+
+ seg->feature_data[segment_id][feature_id] = seg_data;
+}
+
+int vp9_get_segdata(const struct segmentation *seg, int segment_id,
+ SEG_LVL_FEATURES feature_id) {
+ return seg->feature_data[segment_id][feature_id];
+}
+
+
+const vp9_tree_index vp9_segment_tree[TREE_SIZE(MAX_SEGMENTS)] = {
+ 2, 4, 6, 8, 10, 12,
+ 0, -1, -2, -3, -4, -5, -6, -7
+};
+
+
+// TBD? Functions to read and write segment data with range / validity checking