treewriter.h 1.81 KB
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/*
 *  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.
 */

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#ifndef VP10_ENCODER_TREEWRITER_H_
#define VP10_ENCODER_TREEWRITER_H_
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#ifdef VP10_FORCE_VPXBOOL_TREEWRITER
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#include "aom_dsp/bitwriter.h"
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#define tree_writer vpx_writer
#define tree_bit_write vpx_write
#else
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#include "av1/encoder/bitwriter.h"
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#define tree_writer vp10_writer
#define tree_bit_write vp10_write
#endif
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#ifdef __cplusplus
extern "C" {
#endif

void vp10_tree_probs_from_distribution(vpx_tree tree,
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                                       unsigned int branch_ct[/* n - 1 */][2],
                                       const unsigned int num_events[/* n */]);
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struct vp10_token {
  int value;
  int len;
};

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void vp10_tokens_from_tree(struct vp10_token *, const vpx_tree_index *);
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static INLINE void vp10_write_tree(tree_writer *w, const vpx_tree_index *tree,
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                                   const vpx_prob *probs, int bits, int len,
                                   vpx_tree_index i) {
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  do {
    const int bit = (bits >> --len) & 1;
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    tree_bit_write(w, bit, probs[i >> 1]);
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    i = tree[i + bit];
  } while (len);
}

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static INLINE void vp10_write_token(tree_writer *w, const vpx_tree_index *tree,
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                                    const vpx_prob *probs,
                                    const struct vp10_token *token) {
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  vp10_write_tree(w, tree, probs, token->value, token->len, 0);
}

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#undef tree_writer
#undef tree_bit_write
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#ifdef __cplusplus
}  // extern "C"
#endif

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#endif  // VP10_ENCODER_TREEWRITER_H_