94 lines
2.9 KiB
C
94 lines
2.9 KiB
C
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/* -*- C -*-
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* Copyright (c) 1998-2006 Motoyuki Kasahara
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "ebzip.h"
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#include <stdio.h>
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#include <sys/types.h>
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#include "ebu/eb.h"
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/*
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* Compress a slice with the ebzip compression format.
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*
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* If it succeeds, 0 is returned. Otherwise, -1 is returned.
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*/
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int
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ebzip1_slice(char *out_buffer, size_t *out_byte_length, char *in_buffer,
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size_t in_byte_length)
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{
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#ifdef ENABLE_LIBDEFLATE
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struct libdeflate_compressor *compressor;
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size_t result;
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if (!(compressor = libdeflate_alloc_compressor(12))) {
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return -1;
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}
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result = libdeflate_zlib_compress
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(compressor, in_buffer, in_byte_length, out_buffer, in_byte_length);
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*out_byte_length = result ? result : in_byte_length;
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libdeflate_free_compressor(compressor);
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return 0;
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#else
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z_stream stream;
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stream.zalloc = Z_NULL;
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stream.zfree = Z_NULL;
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stream.opaque = Z_NULL;
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if (deflateInit(&stream, ebzip_level > 3
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? Z_BEST_COMPRESSION : Z_DEFAULT_COMPRESSION) != Z_OK)
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return -1;
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stream.next_in = (Bytef *) in_buffer;
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stream.avail_in = in_byte_length;
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stream.next_out = (Bytef *) out_buffer;
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stream.avail_out = in_byte_length;
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if (deflate(&stream, Z_FINISH) != Z_STREAM_END) {
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*out_byte_length = in_byte_length;
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deflateEnd(&stream);
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return 0;
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}
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if (deflateEnd(&stream) != Z_OK)
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return -1;
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*out_byte_length = stream.total_out;
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return 0;
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#endif
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}
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