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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /media/libvpx/vp9/encoder/vp9_treewriter.h
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'media/libvpx/vp9/encoder/vp9_treewriter.h')
-rw-r--r--media/libvpx/vp9/encoder/vp9_treewriter.h51
1 files changed, 51 insertions, 0 deletions
diff --git a/media/libvpx/vp9/encoder/vp9_treewriter.h b/media/libvpx/vp9/encoder/vp9_treewriter.h
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+++ b/media/libvpx/vp9/encoder/vp9_treewriter.h
@@ -0,0 +1,51 @@
+/*
+ * 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.
+ */
+
+#ifndef VP9_ENCODER_VP9_TREEWRITER_H_
+#define VP9_ENCODER_VP9_TREEWRITER_H_
+
+#include "vp9/encoder/vp9_writer.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void vp9_tree_probs_from_distribution(vp9_tree tree,
+ unsigned int branch_ct[ /* n - 1 */ ][2],
+ const unsigned int num_events[ /* n */ ]);
+
+struct vp9_token {
+ int value;
+ int len;
+};
+
+void vp9_tokens_from_tree(struct vp9_token*, const vp9_tree_index *);
+
+static INLINE void vp9_write_tree(vp9_writer *w, const vp9_tree_index *tree,
+ const vp9_prob *probs, int bits, int len,
+ vp9_tree_index i) {
+ do {
+ const int bit = (bits >> --len) & 1;
+ vp9_write(w, bit, probs[i >> 1]);
+ i = tree[i + bit];
+ } while (len);
+}
+
+static INLINE void vp9_write_token(vp9_writer *w, const vp9_tree_index *tree,
+ const vp9_prob *probs,
+ const struct vp9_token *token) {
+ vp9_write_tree(w, tree, probs, token->value, token->len, 0);
+}
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+#endif // VP9_ENCODER_VP9_TREEWRITER_H_