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Use default preferences from lz4 cli

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topjohnwu 2017-09-13 01:33:22 +08:00
parent 6b41653a32
commit ba8e7a211a
1 changed files with 22 additions and 13 deletions
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35
jni/magiskboot/compress.c
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@ -151,7 +151,7 @@ size_t lz4(int mode, int fd, const void *buf, size_t size) {
LZ4F_compressionContext_t cctx;
LZ4F_frameInfo_t info;
size_t outCapacity, avail_in, ret = 0, pos = 0, total = 0;
size_t blockSize, outCapacity, avail_in, ret = 0, pos = 0, total = 0;
size_t have, read;
void *out = NULL;
@ -171,10 +171,11 @@ size_t lz4(int mode, int fd, const void *buf, size_t size) {
LOGE(1, "Context creation error: %s\n", LZ4F_getErrorName(ret));
// Allocate out buffer
blockSize = 1 << 22;
switch(mode) {
case 0:
// Read header
read = CHUNK;
read = blockSize;
ret = LZ4F_getFrameInfo(dctx, &info, buf, &read);
if (LZ4F_isError(ret))
LOGE(1, "LZ4F_getFrameInfo error: %s\n", LZ4F_getErrorName(ret));
@ -190,7 +191,7 @@ size_t lz4(int mode, int fd, const void *buf, size_t size) {
pos += read;
break;
case 1:
outCapacity = LZ4F_compressBound(CHUNK, NULL) + LZ4_HEADER_SIZE + LZ4_FOOTER_SIZE;
outCapacity = LZ4F_compressFrameBound(blockSize, NULL);
break;
}
@ -198,23 +199,31 @@ size_t lz4(int mode, int fd, const void *buf, size_t size) {
// Write header
if (mode == 1) {
have = ret = LZ4F_compressBegin(cctx, out, size, NULL);
LZ4F_preferences_t prefs;
memset(&prefs, 0, sizeof(prefs));
prefs.autoFlush = 1;
prefs.compressionLevel = 9;
prefs.frameInfo.blockMode = 1;
prefs.frameInfo.blockSizeID = 7;
prefs.frameInfo.contentChecksumFlag = 1;
have = ret = LZ4F_compressBegin(cctx, out, size, &prefs);
if (LZ4F_isError(ret))
LOGE(1, "Failed to start compression: error %s\n", LZ4F_getErrorName(ret));
total += xwrite(fd, out, have);
}
do {
if (pos + CHUNK >= size) {
if (pos + blockSize >= size) {
avail_in = size - pos;
} else {
avail_in = CHUNK;
avail_in = blockSize;
}
do {
switch(mode) {
case 0:
have = outCapacity, read = avail_in;
have = outCapacity;
read = avail_in;
ret = LZ4F_decompress(dctx, out, &have, buf + pos, &read, NULL);
break;
case 1:
@ -513,16 +522,16 @@ void comp_file(const char *method, const char *from, const char *to) {
void *file;
size_t size;
mmap_ro(from, &file, &size);
if (!to) {
if (!to)
snprintf(dest, sizeof(dest), "%s.%s", from, ext);
to = dest;
}
fprintf(stderr, "Compressing to [%s]\n\n", to);
int fd = open_new(to);
else
strcpy(dest, to);
fprintf(stderr, "Compressing to [%s]\n\n", dest);
int fd = open_new(dest);
comp(type, fd, file, size);
close(fd);
munmap(file, size);
if (to == from)
if (!to)
unlink(from);
}