diff options
Diffstat (limited to 'src/liblzma/lzma/lzma_encoder_init.c')
| -rw-r--r-- | src/liblzma/lzma/lzma_encoder_init.c | 228 |
1 files changed, 0 insertions, 228 deletions
diff --git a/src/liblzma/lzma/lzma_encoder_init.c b/src/liblzma/lzma/lzma_encoder_init.c deleted file mode 100644 index 21335f95..00000000 --- a/src/liblzma/lzma/lzma_encoder_init.c +++ /dev/null @@ -1,228 +0,0 @@ -/////////////////////////////////////////////////////////////////////////////// -// -/// \file lzma_encoder_init.c -/// \brief Creating, resetting and destroying the LZMA encoder -// -// Copyright (C) 1999-2006 Igor Pavlov -// Copyright (C) 2007 Lasse Collin -// -// This library is free software; you can redistribute it and/or -// modify it under the terms of the GNU Lesser General Public -// License as published by the Free Software Foundation; either -// version 2.1 of the License, or (at your option) any later version. -// -// This library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -// Lesser General Public License for more details. -// -/////////////////////////////////////////////////////////////////////////////// - -#include "lzma_encoder_private.h" - - -/// \brief Initializes the length encoder -static void -length_encoder_reset(lzma_length_encoder *lencoder, - const uint32_t num_pos_states, const uint32_t table_size) -{ - // NLength::CPriceTableEncoder::SetTableSize() - lencoder->table_size = table_size; - - // NLength::CEncoder::Init() - bit_reset(lencoder->choice); - bit_reset(lencoder->choice2); - - for (size_t pos_state = 0; pos_state < num_pos_states; ++pos_state) { - bittree_reset(lencoder->low[pos_state], LEN_LOW_BITS); - bittree_reset(lencoder->mid[pos_state], LEN_MID_BITS); - } - - bittree_reset(lencoder->high, LEN_HIGH_BITS); - - // NLength::CPriceTableEncoder::UpdateTables() - for (size_t pos_state = 0; pos_state < num_pos_states; ++pos_state) - lencoder->counters[pos_state] = 1; - - return; -} - - -static void -lzma_lzma_encoder_end(lzma_coder *coder, lzma_allocator *allocator) -{ - lzma_lz_encoder_end(&coder->lz, allocator); - lzma_free(coder, allocator); - return; -} - - -extern lzma_ret -lzma_lzma_encoder_init(lzma_next_coder *next, lzma_allocator *allocator, - const lzma_filter_info *filters) -{ - if (next->coder == NULL) { - next->coder = lzma_alloc(sizeof(lzma_coder), allocator); - if (next->coder == NULL) - return LZMA_MEM_ERROR; - - next->coder->next = LZMA_NEXT_CODER_INIT; - next->coder->lz = LZMA_LZ_ENCODER_INIT; - } - - // Validate options that aren't validated elsewhere. - const lzma_options_lzma *options = filters[0].options; - if (options->pos_bits > LZMA_POS_BITS_MAX - || options->fast_bytes < LZMA_FAST_BYTES_MIN - || options->fast_bytes > LZMA_FAST_BYTES_MAX) { - lzma_lzma_encoder_end(next->coder, allocator); - return LZMA_HEADER_ERROR; - } - - // Set compression mode. - switch (options->mode) { - case LZMA_MODE_FAST: - next->coder->best_compression = false; - break; - - case LZMA_MODE_BEST: - next->coder->best_compression = true; - break; - - default: - lzma_lzma_encoder_end(next->coder, allocator); - return LZMA_HEADER_ERROR; - } - - // Initialize literal coder. - { - const lzma_ret ret = lzma_literal_init( - &next->coder->literal_coder, - options->literal_context_bits, - options->literal_pos_bits); - if (ret != LZMA_OK) - return ret; - } - - // Initialize LZ encoder. - { - const lzma_ret ret = lzma_lz_encoder_reset( - &next->coder->lz, allocator, &lzma_lzma_encode, - options->dictionary_size, OPTS, - options->fast_bytes, MATCH_MAX_LEN + 1 + OPTS, - options->match_finder, - options->match_finder_cycles, - options->preset_dictionary, - options->preset_dictionary_size); - if (ret != LZMA_OK) { - lzma_lzma_encoder_end(next->coder, allocator); - return ret; - } - } - - // Set dist_table_size. - { - // Round the dictionary size up to next 2^n. - uint32_t log_size; - for (log_size = 0; (UINT32_C(1) << log_size) - < options->dictionary_size; ++log_size) ; - - next->coder->dist_table_size = log_size * 2; - } - - // Misc FIXME desc - next->coder->align_price_count = UINT32_MAX; - next->coder->match_price_count = UINT32_MAX; - next->coder->dictionary_size = options->dictionary_size; - next->coder->pos_mask = (1U << options->pos_bits) - 1; - next->coder->fast_bytes = options->fast_bytes; - - // Range coder - rc_reset(&next->coder->rc); - - // State - next->coder->state = 0; - next->coder->previous_byte = 0; - for (size_t i = 0; i < REP_DISTANCES; ++i) - next->coder->reps[i] = 0; - - // Bit encoders - for (size_t i = 0; i < STATES; ++i) { - for (size_t j = 0; j <= next->coder->pos_mask; ++j) { - bit_reset(next->coder->is_match[i][j]); - bit_reset(next->coder->is_rep0_long[i][j]); - } - - bit_reset(next->coder->is_rep[i]); - bit_reset(next->coder->is_rep0[i]); - bit_reset(next->coder->is_rep1[i]); - bit_reset(next->coder->is_rep2[i]); - } - - for (size_t i = 0; i < FULL_DISTANCES - END_POS_MODEL_INDEX; ++i) - bit_reset(next->coder->pos_encoders[i]); - - // Bit tree encoders - for (size_t i = 0; i < LEN_TO_POS_STATES; ++i) - bittree_reset(next->coder->pos_slot_encoder[i], POS_SLOT_BITS); - - bittree_reset(next->coder->pos_align_encoder, ALIGN_BITS); - - // Length encoders - length_encoder_reset(&next->coder->match_len_encoder, - 1U << options->pos_bits, - options->fast_bytes + 1 - MATCH_MIN_LEN); - - length_encoder_reset(&next->coder->rep_len_encoder, - 1U << options->pos_bits, - next->coder->fast_bytes + 1 - MATCH_MIN_LEN); - - next->coder->prev_len_encoder = NULL; - - // Misc - next->coder->longest_match_was_found = false; - next->coder->optimum_end_index = 0; - next->coder->optimum_current_index = 0; - next->coder->additional_offset = 0; - - next->coder->now_pos = 0; - next->coder->is_initialized = false; - next->coder->is_flushed = false, - next->coder->write_eopm = true; - - // Initialize the next decoder in the chain, if any. - { - const lzma_ret ret = lzma_next_filter_init(&next->coder->next, - allocator, filters + 1); - if (ret != LZMA_OK) { - lzma_lzma_encoder_end(next->coder, allocator); - return ret; - } - } - - // Initialization successful. Set the function pointers. - next->code = &lzma_lz_encode; - next->end = &lzma_lzma_encoder_end; - - return LZMA_OK; -} - - -extern bool -lzma_lzma_encode_properties(const lzma_options_lzma *options, uint8_t *byte) -{ - if (options->literal_context_bits > LZMA_LITERAL_CONTEXT_BITS_MAX - || options->literal_pos_bits - > LZMA_LITERAL_POS_BITS_MAX - || options->pos_bits > LZMA_POS_BITS_MAX - || options->literal_context_bits - + options->literal_pos_bits - > LZMA_LITERAL_BITS_MAX) - return true; - - *byte = (options->pos_bits * 5 + options->literal_pos_bits) * 9 - + options->literal_context_bits; - assert(*byte <= (4 * 5 + 4) * 9 + 8); - - return false; -} |