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authorNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
committerNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
commite0c6872cf40896c7be36b11dcc744620f10adf1d (patch)
tree60335e10d2f4354b0674ec22d7b53f0f8abee672 /dviware/dvisvgm/libs/brotli/enc/brotli_bit_stream.h
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+/* Copyright 2014 Google Inc. All Rights Reserved.
+
+ Distributed under MIT license.
+ See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
+*/
+
+/* Functions to convert brotli-related data structures into the
+ brotli bit stream. The functions here operate under
+ assumption that there is enough space in the storage, i.e., there are
+ no out-of-range checks anywhere.
+
+ These functions do bit addressing into a byte array. The byte array
+ is called "storage" and the index to the bit is called storage_ix
+ in function arguments. */
+
+#ifndef BROTLI_ENC_BROTLI_BIT_STREAM_H_
+#define BROTLI_ENC_BROTLI_BIT_STREAM_H_
+
+#include "../common/context.h"
+#include "../common/platform.h"
+#include <brotli/types.h>
+#include "./command.h"
+#include "./entropy_encode.h"
+#include "./memory.h"
+#include "./metablock.h"
+
+#if defined(__cplusplus) || defined(c_plusplus)
+extern "C" {
+#endif
+
+/* All Store functions here will use a storage_ix, which is always the bit
+ position for the current storage. */
+
+BROTLI_INTERNAL void BrotliStoreHuffmanTree(const uint8_t* depths, size_t num,
+ HuffmanTree* tree, size_t* storage_ix, uint8_t* storage);
+
+BROTLI_INTERNAL void BrotliBuildAndStoreHuffmanTreeFast(
+ MemoryManager* m, const uint32_t* histogram, const size_t histogram_total,
+ const size_t max_bits, uint8_t* depth, uint16_t* bits, size_t* storage_ix,
+ uint8_t* storage);
+
+/* REQUIRES: length > 0 */
+/* REQUIRES: length <= (1 << 24) */
+BROTLI_INTERNAL void BrotliStoreMetaBlock(MemoryManager* m,
+ const uint8_t* input, size_t start_pos, size_t length, size_t mask,
+ uint8_t prev_byte, uint8_t prev_byte2, BROTLI_BOOL is_last,
+ const BrotliEncoderParams* params, ContextType literal_context_mode,
+ const Command* commands, size_t n_commands, const MetaBlockSplit* mb,
+ size_t* storage_ix, uint8_t* storage);
+
+/* Stores the meta-block without doing any block splitting, just collects
+ one histogram per block category and uses that for entropy coding.
+ REQUIRES: length > 0
+ REQUIRES: length <= (1 << 24) */
+BROTLI_INTERNAL void BrotliStoreMetaBlockTrivial(MemoryManager* m,
+ const uint8_t* input, size_t start_pos, size_t length, size_t mask,
+ BROTLI_BOOL is_last, const BrotliEncoderParams* params,
+ const Command* commands, size_t n_commands,
+ size_t* storage_ix, uint8_t* storage);
+
+/* Same as above, but uses static prefix codes for histograms with a only a few
+ symbols, and uses static code length prefix codes for all other histograms.
+ REQUIRES: length > 0
+ REQUIRES: length <= (1 << 24) */
+BROTLI_INTERNAL void BrotliStoreMetaBlockFast(MemoryManager* m,
+ const uint8_t* input, size_t start_pos, size_t length, size_t mask,
+ BROTLI_BOOL is_last, const BrotliEncoderParams* params,
+ const Command* commands, size_t n_commands,
+ size_t* storage_ix, uint8_t* storage);
+
+/* This is for storing uncompressed blocks (simple raw storage of
+ bytes-as-bytes).
+ REQUIRES: length > 0
+ REQUIRES: length <= (1 << 24) */
+BROTLI_INTERNAL void BrotliStoreUncompressedMetaBlock(
+ BROTLI_BOOL is_final_block, const uint8_t* BROTLI_RESTRICT input,
+ size_t position, size_t mask, size_t len,
+ size_t* BROTLI_RESTRICT storage_ix, uint8_t* BROTLI_RESTRICT storage);
+
+#if defined(__cplusplus) || defined(c_plusplus)
+} /* extern "C" */
+#endif
+
+#endif /* BROTLI_ENC_BROTLI_BIT_STREAM_H_ */