| /////////////////////////////////////////////////////////////////////////////// |
| // |
| /// \file easy_multi.c |
| /// \brief Easy Multi-Block Stream encoder initialization |
| // |
| // Copyright (C) 2008 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 "easy_common.h" |
| #include "stream_encoder_multi.h" |
| |
| |
| struct lzma_coder_s { |
| lzma_next_coder encoder; |
| lzma_options_stream options; |
| }; |
| |
| |
| static lzma_ret |
| easy_encode(lzma_coder *coder, lzma_allocator *allocator, |
| const uint8_t *restrict in, size_t *restrict in_pos, |
| size_t in_size, uint8_t *restrict out, |
| size_t *restrict out_pos, size_t out_size, lzma_action action) |
| { |
| return coder->encoder.code(coder->encoder.coder, allocator, |
| in, in_pos, in_size, out, out_pos, out_size, action); |
| } |
| |
| |
| static void |
| easy_encoder_end(lzma_coder *coder, lzma_allocator *allocator) |
| { |
| lzma_next_coder_end(&coder->encoder, allocator); |
| lzma_free(coder, allocator); |
| return; |
| } |
| |
| |
| static lzma_ret |
| easy_encoder_init(lzma_next_coder *next, lzma_allocator *allocator, |
| lzma_easy_level level, lzma_easy_level metadata_level, |
| const lzma_extra *header, const lzma_extra *footer) |
| { |
| if (next->coder == NULL) { |
| next->coder = lzma_alloc(sizeof(lzma_coder), allocator); |
| if (next->coder == NULL) |
| return LZMA_MEM_ERROR; |
| |
| next->code = &easy_encode; |
| next->end = &easy_encoder_end; |
| |
| next->coder->encoder = LZMA_NEXT_CODER_INIT; |
| } |
| |
| next->coder->options = (lzma_options_stream){ |
| .check = LZMA_CHECK_CRC32, |
| .has_crc32 = true, |
| .uncompressed_size = LZMA_VLI_VALUE_UNKNOWN, |
| .alignment = 0, |
| .header = header, |
| .footer = footer, |
| }; |
| |
| if (lzma_easy_set_filters(next->coder->options.filters, level) |
| || lzma_easy_set_filters( |
| next->coder->options.metadata_filters, |
| metadata_level)) |
| return LZMA_HEADER_ERROR; |
| |
| return lzma_stream_encoder_multi_init(&next->coder->encoder, |
| allocator, &next->coder->options); |
| } |
| |
| |
| extern LZMA_API lzma_ret |
| lzma_easy_encoder_multi(lzma_stream *strm, |
| lzma_easy_level level, lzma_easy_level metadata_level, |
| const lzma_extra *header, const lzma_extra *footer) |
| { |
| // This is more complicated than lzma_easy_encoder_single(), |
| // because lzma_stream_encoder_multi() wants that the options |
| // structure is available until the encoding is finished. |
| lzma_next_strm_init(strm, easy_encoder_init, |
| level, metadata_level, header, footer); |
| |
| strm->internal->supported_actions[LZMA_RUN] = true; |
| strm->internal->supported_actions[LZMA_SYNC_FLUSH] = true; |
| strm->internal->supported_actions[LZMA_FULL_FLUSH] = true; |
| strm->internal->supported_actions[LZMA_FINISH] = true; |
| |
| return LZMA_OK; |
| } |