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squashfs4: make the lzma parameters configurable, and change the defaults for slightly improved compression on mips (mostly unchanged on other architectures)

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@25530 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd 2011-02-13 19:59:02 +00:00
parent 78a35be696
commit 9065072af2
2 changed files with 91 additions and 11 deletions
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91
tools/squashfs4/patches/130-dynamic_lzma_params.patch Normal file
View File

@ -0,0 +1,91 @@
--- a/squashfs-tools/lzma_wrapper.c
+++ b/squashfs-tools/lzma_wrapper.c
@@ -20,6 +20,8 @@
*/
#include <LzmaLib.h>
+#include <stdio.h>
+#include "compressor.h"
#define LZMA_HEADER_SIZE (LZMA_PROPS_SIZE + 8)
@@ -30,9 +32,18 @@
size_t props_size = LZMA_PROPS_SIZE,
outlen = block_size - LZMA_HEADER_SIZE;
int res;
+ int lc;
+ int lp;
+ int pb;
+
+ if (!comp_args || sscanf(comp_args, "%d:%d:%d", &lc, &lp, &pb) != 3) {
+ lc = 0;
+ lp = 2;
+ pb = 2;
+ }
res = LzmaCompress(d + LZMA_HEADER_SIZE, &outlen, s, size, d,
- &props_size, 5, block_size, 3, 0, 2, 32, 1);
+ &props_size, 5, block_size, lc, lp, pb, 32, 1);
if(res == SZ_ERROR_OUTPUT_EOF) {
/*
--- a/squashfs-tools/compressor.c
+++ b/squashfs-tools/compressor.c
@@ -25,6 +25,7 @@
#include "compressor.h"
#include "squashfs_fs.h"
+char *comp_args = NULL;
extern int gzip_compress(void **, char *, char *, int, int, int *);
extern int gzip_uncompress(char *, char *, int, int, int *);
extern int lzma_compress(void **, char *, char *, int, int, int *);
--- a/squashfs-tools/compressor.h
+++ b/squashfs-tools/compressor.h
@@ -31,3 +31,4 @@
extern struct compressor *lookup_compressor(char *);
extern struct compressor *lookup_compressor_id(int);
extern void display_compressors(char *, char *);
+extern char *comp_args;
--- a/squashfs-tools/mksquashfs.c
+++ b/squashfs-tools/mksquashfs.c
@@ -4355,6 +4355,12 @@
exit(1);
}
comp_name = argv[i];
+ } else if(strcmp(argv[i], "-comp_args") == 0) {
+ if(++i == argc) {
+ ERROR("%s: -comp_args missing compression arguments\n", argv[0]);
+ exit(1);
+ }
+ comp_args = argv[i];
} else if(strcmp(argv[i], "-pf") == 0) {
if(++i == argc) {
ERROR("%s: -pf missing filename\n", argv[0]);
@@ -4574,6 +4580,7 @@
"[-e list of exclude\ndirs/files]\n", argv[0]);
ERROR("\nFilesystem build options:\n");
ERROR("-comp <comp>\t\tselect <comp> compression\n");
+ ERROR("-comp_args <comp>\t\tselect compression arguments\n");
ERROR("\t\t\tCompressors available:\n");
display_compressors("\t\t\t", COMP_DEFAULT);
ERROR("-b <block_size>\t\tset data block to "
@@ -4736,7 +4743,8 @@
else if(strcmp(argv[i], "-root-becomes") == 0 ||
strcmp(argv[i], "-sort") == 0 ||
strcmp(argv[i], "-pf") == 0 ||
- strcmp(argv[i], "-comp") == 0)
+ strcmp(argv[i], "-comp") == 0 ||
+ strcmp(argv[i], "-comp_args") == 0)
i++;
if(i != argc) {
@@ -4761,7 +4769,8 @@
else if(strcmp(argv[i], "-root-becomes") == 0 ||
strcmp(argv[i], "-ef") == 0 ||
strcmp(argv[i], "-pf") == 0 ||
- strcmp(argv[i], "-comp") == 0)
+ strcmp(argv[i], "-comp") == 0 ||
+ strcmp(argv[i], "-comp_args") == 0)
i++;
#ifdef SQUASHFS_TRACE

11
tools/squashfs4/patches/130-lzma_props.patch
View File

@ -1,11 +0,0 @@
--- a/squashfs-tools/lzma_wrapper.c
+++ b/squashfs-tools/lzma_wrapper.c
@@ -32,7 +32,7 @@ int lzma_compress(void **strm, char *des
int res;
res = LzmaCompress(d + LZMA_HEADER_SIZE, &outlen, s, size, d,
- &props_size, 5, block_size, 3, 0, 2, 32, 1);
+ &props_size, 5, block_size, 1, 2, 2, 32, 1);
if(res == SZ_ERROR_OUTPUT_EOF) {
/*