*/
/*
- * Copyright (C) 2013 Eric Biggers
+ * Copyright (C) 2013, 2014 Eric Biggers
*
- * This file is part of wimlib, a library for working with WIM files.
+ * This file 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 3 of the License, or (at your option) any
+ * later version.
*
- * wimlib is free software; you can redistribute it and/or modify it under the
- * terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 3 of the License, or (at your option)
- * any later version.
- *
- * wimlib 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 General Public License for more
+ * This file 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.
*
- * You should have received a copy of the GNU General Public License
- * along with wimlib; if not, see http://www.gnu.org/licenses/.
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this file; if not, see http://www.gnu.org/licenses/.
*/
#ifdef HAVE_CONFIG_H
#endif
#include "wimlib.h"
+#include "wimlib/error.h"
#include "wimlib/compressor_ops.h"
#include "wimlib/util.h"
struct wimlib_compressor {
const struct compressor_ops *ops;
void *private;
+ enum wimlib_compression_type ctype;
+ size_t max_block_size;
};
static const struct compressor_ops *compressor_ops[] = {
- [WIMLIB_COMPRESSION_TYPE_LZX] = &lzx_compressor_ops,
[WIMLIB_COMPRESSION_TYPE_XPRESS] = &xpress_compressor_ops,
+ [WIMLIB_COMPRESSION_TYPE_LZX] = &lzx_compressor_ops,
[WIMLIB_COMPRESSION_TYPE_LZMS] = &lzms_compressor_ops,
};
-static struct wimlib_compressor_params_header *
-compressor_default_params[ARRAY_LEN(compressor_ops)] = {
- [WIMLIB_COMPRESSION_TYPE_LZX] = NULL,
- [WIMLIB_COMPRESSION_TYPE_XPRESS] = NULL,
- [WIMLIB_COMPRESSION_TYPE_LZMS] = NULL,
-};
+/* Scale: 10 = low, 50 = medium, 100 = high */
+
+#define DEFAULT_COMPRESSION_LEVEL 50
+
+static unsigned int default_compression_levels[ARRAY_LEN(compressor_ops)];
static bool
compressor_ctype_valid(int ctype)
}
WIMLIBAPI int
-wimlib_set_default_compressor_params(enum wimlib_compression_type ctype,
- const struct wimlib_compressor_params_header *params)
+wimlib_set_default_compression_level(int ctype, unsigned int compression_level)
{
- struct wimlib_compressor_params_header *dup;
-
- if (!compressor_ctype_valid(ctype))
- return WIMLIB_ERR_INVALID_COMPRESSION_TYPE;
-
- dup = NULL;
- if (params) {
- dup = memdup(params, params->size);
- if (dup == NULL)
- return WIMLIB_ERR_NOMEM;
+ if (ctype == -1) {
+ for (int i = 0; i < ARRAY_LEN(default_compression_levels); i++)
+ default_compression_levels[i] = compression_level;
+ } else {
+ if (!compressor_ctype_valid(ctype))
+ return WIMLIB_ERR_INVALID_COMPRESSION_TYPE;
+
+ default_compression_levels[ctype] = compression_level;
}
-
- FREE(compressor_default_params[ctype]);
- compressor_default_params[ctype] = dup;
return 0;
}
-void
-cleanup_compressor_params(void)
+WIMLIBAPI u64
+wimlib_get_compressor_needed_memory(enum wimlib_compression_type ctype,
+ size_t max_block_size,
+ unsigned int compression_level)
{
- for (size_t i = 0; i < ARRAY_LEN(compressor_default_params); i++) {
- FREE(compressor_default_params[i]);
- compressor_default_params[i] = NULL;
+ bool destructive;
+ const struct compressor_ops *ops;
+ u64 size;
+
+ destructive = (compression_level & WIMLIB_COMPRESSOR_FLAG_DESTRUCTIVE);
+ compression_level &= ~WIMLIB_COMPRESSOR_FLAG_DESTRUCTIVE;
+
+ if (!compressor_ctype_valid(ctype))
+ return 0;
+
+ if (compression_level > 0xFFFFFF)
+ return 0;
+
+ if (max_block_size == 0)
+ return 0;
+
+ ops = compressor_ops[ctype];
+
+ if (compression_level == 0)
+ compression_level = default_compression_levels[ctype];
+ if (compression_level == 0)
+ compression_level = DEFAULT_COMPRESSION_LEVEL;
+
+ if (ops->get_needed_memory) {
+ size = ops->get_needed_memory(max_block_size, compression_level,
+ destructive);
+
+ /* 0 is never valid and indicates an invalid max_block_size. */
+ if (size == 0)
+ return 0;
+ } else {
+ size = 0;
}
+ return size + sizeof(struct wimlib_compressor);
}
WIMLIBAPI int
wimlib_create_compressor(enum wimlib_compression_type ctype,
size_t max_block_size,
- const struct wimlib_compressor_params_header *extra_params,
+ unsigned int compression_level,
struct wimlib_compressor **c_ret)
{
+ bool destructive;
struct wimlib_compressor *c;
- if (c_ret == NULL)
- return WIMLIB_ERR_INVALID_PARAM;
+ destructive = (compression_level & WIMLIB_COMPRESSOR_FLAG_DESTRUCTIVE);
+ compression_level &= ~WIMLIB_COMPRESSOR_FLAG_DESTRUCTIVE;
if (!compressor_ctype_valid(ctype))
return WIMLIB_ERR_INVALID_COMPRESSION_TYPE;
+ if (compression_level > 0xFFFFFF)
+ return WIMLIB_ERR_INVALID_PARAM;
+
+ if (c_ret == NULL)
+ return WIMLIB_ERR_INVALID_PARAM;
+
+ if (max_block_size == 0)
+ return WIMLIB_ERR_INVALID_PARAM;
+
c = MALLOC(sizeof(*c));
if (c == NULL)
return WIMLIB_ERR_NOMEM;
c->ops = compressor_ops[ctype];
c->private = NULL;
+ c->ctype = ctype;
+ c->max_block_size = max_block_size;
if (c->ops->create_compressor) {
- const struct wimlib_compressor_params_header *params;
int ret;
- if (extra_params)
- params = extra_params;
- else
- params = compressor_default_params[ctype];
+ if (compression_level == 0)
+ compression_level = default_compression_levels[ctype];
+ if (compression_level == 0)
+ compression_level = DEFAULT_COMPRESSION_LEVEL;
+
ret = c->ops->create_compressor(max_block_size,
- params, &c->private);
+ compression_level,
+ destructive,
+ &c->private);
if (ret) {
FREE(c);
return ret;
void *compressed_data, size_t compressed_size_avail,
struct wimlib_compressor *c)
{
+ if (unlikely(uncompressed_size == 0 || uncompressed_size > c->max_block_size))
+ return 0;
+
return c->ops->compress(uncompressed_data, uncompressed_size,
compressed_data, compressed_size_avail,
c->private);
git://wimlib.net / wimlib / blobdiff