da113fe40d
-Added ability to convert xml and tscn scenes to binary on export, makes loading of larger scenes faster
47 lines
1.6 KiB
C
47 lines
1.6 KiB
C
// Copyright 2011 Google Inc. All Rights Reserved.
|
|
//
|
|
// This code is licensed under the same terms as WebM:
|
|
// Software License Agreement: http://www.webmproject.org/license/software/
|
|
// Additional IP Rights Grant: http://www.webmproject.org/license/additional/
|
|
// -----------------------------------------------------------------------------
|
|
//
|
|
// Author: Jyrki Alakuijala (jyrki@google.com)
|
|
//
|
|
// Entropy encoding (Huffman) for webp lossless
|
|
|
|
#ifndef WEBP_UTILS_HUFFMAN_ENCODE_H_
|
|
#define WEBP_UTILS_HUFFMAN_ENCODE_H_
|
|
|
|
#include "../types.h"
|
|
|
|
#if defined(__cplusplus) || defined(c_plusplus)
|
|
extern "C" {
|
|
#endif
|
|
|
|
// Struct for holding the tree header in coded form.
|
|
typedef struct {
|
|
uint8_t code; // value (0..15) or escape code (16,17,18)
|
|
uint8_t extra_bits; // extra bits for escape codes
|
|
} HuffmanTreeToken;
|
|
|
|
// Struct to represent the tree codes (depth and bits array).
|
|
typedef struct {
|
|
int num_symbols; // Number of symbols.
|
|
uint8_t* code_lengths; // Code lengths of the symbols.
|
|
uint16_t* codes; // Symbol Codes.
|
|
} HuffmanTreeCode;
|
|
|
|
// Turn the Huffman tree into a token sequence.
|
|
// Returns the number of tokens used.
|
|
int VP8LCreateCompressedHuffmanTree(const HuffmanTreeCode* const tree,
|
|
HuffmanTreeToken* tokens, int max_tokens);
|
|
|
|
// Create an optimized tree, and tokenize it.
|
|
int VP8LCreateHuffmanTree(int* const histogram, int tree_depth_limit,
|
|
HuffmanTreeCode* const tree);
|
|
|
|
#if defined(__cplusplus) || defined(c_plusplus)
|
|
}
|
|
#endif
|
|
|
|
#endif // WEBP_UTILS_HUFFMAN_ENCODE_H_
|