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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.
35 lines
1.1 KiB
C
35 lines
1.1 KiB
C
/* NOLINT(build/header_guard) */
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/* Copyright 2014 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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/* template parameters: FN */
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#define HistogramType FN(Histogram)
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/* Creates entropy codes for all block types and stores them to the bit
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stream. */
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static void FN(BuildAndStoreEntropyCodes)(MemoryManager* m, BlockEncoder* self,
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const HistogramType* histograms, const size_t histograms_size,
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const size_t alphabet_size, HuffmanTree* tree,
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size_t* storage_ix, uint8_t* storage) {
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const size_t table_size = histograms_size * self->histogram_length_;
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self->depths_ = BROTLI_ALLOC(m, uint8_t, table_size);
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self->bits_ = BROTLI_ALLOC(m, uint16_t, table_size);
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if (BROTLI_IS_OOM(m)) return;
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{
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size_t i;
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for (i = 0; i < histograms_size; ++i) {
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size_t ix = i * self->histogram_length_;
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BuildAndStoreHuffmanTree(&histograms[i].data_[0], self->histogram_length_,
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alphabet_size, tree, &self->depths_[ix], &self->bits_[ix],
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storage_ix, storage);
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}
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}
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}
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#undef HistogramType
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