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35e69fc7cf
* New feature: "Large Window Brotli" By setting special encoder/decoder flag it is now possible to extend LZ-window up to 30 bits; though produced stream will not be RFC7932 compliant. Added new dictionary generator - "DSH". It combines speed of "Sieve" and quality of "DM". Plus utilities to prepare train corpora (remove unique strings). Improved compression ratio: now two sub-blocks could be stitched: the last copy command could be extended to span the next sub-block. Fixed compression ineffectiveness caused by floating numbers rounding and wrong cost heuristic. Other C changes: - combined / moved `context.h` to `common` - moved transforms to `common` - unified some aspects of code formatting - added an abstraction for encoder (static) dictionary - moved default allocator/deallocator functions to `common` brotli CLI: - window size is auto-adjusted if not specified explicitly Java: - added "eager" decoding both to JNI wrapper and pure decoder - huge speed-up of `DictionaryData` initialization * Add dictionaryless compressed dictionary * Fix `sources.lst` * Fix `sources.lst` and add a note that `libtool` is also required. * Update setup.py * Fix `EagerStreamTest` * Fix BUILD file * Add missing `libdivsufsort` dependency * Fix "unused parameter" warning.
39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
/* Copyright 2013 Google Inc. All Rights Reserved.
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Distributed under MIT license.
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See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
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*/
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/* Function to find backward reference copies. */
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#ifndef BROTLI_ENC_BACKWARD_REFERENCES_H_
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#define BROTLI_ENC_BACKWARD_REFERENCES_H_
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#include "../common/constants.h"
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#include "../common/dictionary.h"
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#include "../common/platform.h"
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#include <brotli/types.h>
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#include "./command.h"
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#include "./hash.h"
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#include "./quality.h"
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#if defined(__cplusplus) || defined(c_plusplus)
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extern "C" {
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#endif
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/* "commands" points to the next output command to write to, "*num_commands" is
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initially the total amount of commands output by previous
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CreateBackwardReferences calls, and must be incremented by the amount written
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by this call. */
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BROTLI_INTERNAL void BrotliCreateBackwardReferences(
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size_t num_bytes, size_t position, const uint8_t* ringbuffer,
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size_t ringbuffer_mask, const BrotliEncoderParams* params,
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HasherHandle hasher, int* dist_cache, size_t* last_insert_len,
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Command* commands, size_t* num_commands, size_t* num_literals);
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#if defined(__cplusplus) || defined(c_plusplus)
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} /* extern "C" */
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#endif
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#endif /* BROTLI_ENC_BACKWARD_REFERENCES_H_ */
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