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104 lines
3.1 KiB
C
104 lines
3.1 KiB
C
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///////////////////////////////////////////////////////////////////////////////
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//
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/// \file easy_multi.c
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/// \brief Easy Multi-Block Stream encoder initialization
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//
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// Copyright (C) 2008 Lasse Collin
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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///////////////////////////////////////////////////////////////////////////////
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#include "easy_common.h"
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#include "stream_encoder_multi.h"
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struct lzma_coder_s {
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lzma_next_coder encoder;
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lzma_options_stream options;
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};
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static lzma_ret
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easy_encode(lzma_coder *coder, lzma_allocator *allocator,
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const uint8_t *restrict in, size_t *restrict in_pos,
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size_t in_size, uint8_t *restrict out,
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size_t *restrict out_pos, size_t out_size, lzma_action action)
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{
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return coder->encoder.code(coder->encoder.coder, allocator,
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in, in_pos, in_size, out, out_pos, out_size, action);
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}
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static void
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easy_encoder_end(lzma_coder *coder, lzma_allocator *allocator)
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{
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lzma_next_coder_end(&coder->encoder, allocator);
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lzma_free(coder, allocator);
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return;
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}
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static lzma_ret
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easy_encoder_init(lzma_next_coder *next, lzma_allocator *allocator,
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lzma_easy_level level, lzma_easy_level metadata_level,
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const lzma_extra *header, const lzma_extra *footer)
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{
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if (next->coder == NULL) {
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next->coder = lzma_alloc(sizeof(lzma_coder), allocator);
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if (next->coder == NULL)
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return LZMA_MEM_ERROR;
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next->code = &easy_encode;
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next->end = &easy_encoder_end;
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next->coder->encoder = LZMA_NEXT_CODER_INIT;
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}
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next->coder->options = (lzma_options_stream){
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.check = LZMA_CHECK_CRC32,
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.has_crc32 = true,
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.uncompressed_size = LZMA_VLI_VALUE_UNKNOWN,
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.alignment = 0,
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.header = header,
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.footer = footer,
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};
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if (lzma_easy_set_filters(next->coder->options.filters, level)
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|| lzma_easy_set_filters(
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next->coder->options.metadata_filters,
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metadata_level))
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return LZMA_HEADER_ERROR;
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return lzma_stream_encoder_multi_init(&next->coder->encoder,
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allocator, &next->coder->options);
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}
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extern LZMA_API lzma_ret
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lzma_easy_encoder_multi(lzma_stream *strm,
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lzma_easy_level level, lzma_easy_level metadata_level,
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const lzma_extra *header, const lzma_extra *footer)
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{
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// This is more complicated than lzma_easy_encoder_single(),
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// because lzma_stream_encoder_multi() wants that the options
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// structure is available until the encoding is finished.
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lzma_next_strm_init(strm, easy_encoder_init,
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level, metadata_level, header, footer);
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strm->internal->supported_actions[LZMA_RUN] = true;
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strm->internal->supported_actions[LZMA_SYNC_FLUSH] = true;
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strm->internal->supported_actions[LZMA_FULL_FLUSH] = true;
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strm->internal->supported_actions[LZMA_FINISH] = true;
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return LZMA_OK;
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}
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