static void load_mozjpeg_fcts(void)
{
void *handle;
#ifdef __APPLE__
handle = dlopen("libmozjpeg.dylib", RTLD_LAZY);
#else
handle = dlopen("libmozjpeg.so", RTLD_LAZY);
#endif
if (!handle) {
LOG_ERROR("Unable to load mozjpeg library.");
go_through();
}
mozjpeg_fcts.jpeg_std_error = (struct jpeg_error_mgr *(*)())
dlsym(handle, "jpeg_std_error");
mozjpeg_fcts.jpeg_CreateCompress = (void (*)())
dlsym(handle, "jpeg_CreateCompress");
mozjpeg_fcts.jpeg_CreateDecompress = (void (*)())
dlsym(handle, "jpeg_CreateDecompress");
mozjpeg_fcts.jpeg_set_defaults = (void (*)())
dlsym(handle, "jpeg_set_defaults");
mozjpeg_fcts.jpeg_read_header = (void (*)())
dlsym(handle, "jpeg_read_header");
mozjpeg_fcts.jpeg_stdio_dest = (void (*)())dlsym(handle, "jpeg_stdio_dest");
mozjpeg_fcts.jpeg_stdio_src = (void (*)())dlsym(handle, "jpeg_stdio_src");
mozjpeg_fcts.jpeg_set_quality = (void (*)())
dlsym(handle, "jpeg_set_quality");
mozjpeg_fcts.jpeg_start_compress = (void (*)())
dlsym(handle, "jpeg_start_compress");
mozjpeg_fcts.jpeg_start_decompress = (void (*)())
dlsym(handle, "jpeg_start_decompress");
mozjpeg_fcts.jpeg_read_scanlines = (JDIMENSION (*)())
dlsym(handle, "jpeg_read_scanlines");
mozjpeg_fcts.jpeg_write_scanlines = (JDIMENSION (*)())
dlsym(handle, "jpeg_write_scanlines");
mozjpeg_fcts.jpeg_finish_compress = (void (*)())
dlsym(handle, "jpeg_finish_compress");
mozjpeg_fcts.jpeg_finish_decompress = (void (*)())
dlsym(handle, "jpeg_finish_decompress");
}
int pass_0 (reiserfs_filsys_t fs)
{
if (fsck_log_file (fs) != stderr)
/* this is just to separate warnings in the log file */
fsck_log ("####### Pass 0 #######\n");
if (fsck_mode (fs) == FSCK_ZERO_FILES) {
reiserfs_bitmap_fill (fsck_new_bitmap (fs));
fsck_progress ("Zeroing existing files - all blocks marked used\n");
}
make_aux_bitmaps (fs);
/* pass0 gathers statistics about hash hits */
hash_hits_init (fs);
/* scan the partition */
go_through (fs);
/* find blocks which can be allocated */
find_allocable_blocks (fs);
if (fsck_mode (fs) == FSCK_ZERO_FILES) {
/* flush bitmaps and exit */
fsck_progress ("Zeroing existing files - zeroed %lu blocks\n", tmp_zeroed);
reiserfs_flush_bitmap (fsck_new_bitmap (fs), fs);
reiserfs_close (fs);
exit (0);
}
choose_hash_function (fs);
stage_report (0, fs);
return 0;
}
void recompress_mozjpeg(s_compress_options *compress_opts)
{
struct jpeg_decompress_struct cinfo_in;
struct jpeg_compress_struct cinfo_out;
struct jpeg_error_mgr jerr;
JSAMPARRAY buffer;
int quality;
load_mozjpeg_fcts();
// default jpeg error handler, exit on error.
cinfo_in.err = mozjpeg_fcts.jpeg_std_error(&jerr);
cinfo_out.err = mozjpeg_fcts.jpeg_std_error(&jerr);
mozjpeg_fcts.jpeg_CreateCompress(&cinfo_out,
JPEG_LIB_VERSION,
sizeof(struct jpeg_compress_struct));
mozjpeg_fcts.jpeg_stdio_dest(&cinfo_out, stdout);
mozjpeg_fcts.jpeg_CreateDecompress(&cinfo_in,
JPEG_LIB_VERSION,
sizeof(struct jpeg_decompress_struct));
mozjpeg_fcts.jpeg_stdio_src(&cinfo_in, stdin);
mozjpeg_fcts.jpeg_read_header(&cinfo_in, 1);
quality = JPEGGetImageQuality(&cinfo_in);
LOG_DEBUG("Source quality: %d\n", quality);
if (!should_recompress(compress_opts, quality)) {
LOG_INFO("Image will not be recompressed.");
fseek(stdin, 0, SEEK_SET);
go_through();
}
mozjpeg_fcts.jpeg_start_decompress(&cinfo_in);
cinfo_out.image_width = cinfo_in.output_width;
cinfo_out.image_height = cinfo_in.output_height;
cinfo_out.input_components = 3;
cinfo_out.in_color_space = cinfo_in.out_color_space;
cinfo_out.scan_info = NULL;
cinfo_out.num_scans = 0;
/* cinfo_out.use_moz_defaults = 1; */
/* cinfo_out.optimize_scans = 0; */
int new_quality = compute_new_quality(compress_opts, quality);
mozjpeg_fcts.jpeg_set_defaults(&cinfo_out);
mozjpeg_fcts.jpeg_set_quality(&cinfo_out, new_quality, TRUE);
mozjpeg_fcts.jpeg_start_compress(&cinfo_out, 1);
int row_stride = cinfo_in.output_width * cinfo_in.output_components;
buffer = (*cinfo_in.mem->alloc_sarray)
((j_common_ptr) &cinfo_in, JPOOL_IMAGE, row_stride, 1);
if (!buffer) {
LOG_ERROR("Unable to allocate line buffer.\n");
exit(2);
}
while (cinfo_out.next_scanline < cinfo_out.image_height) {
(void) mozjpeg_fcts.jpeg_read_scanlines(&cinfo_in, buffer, 1);
(void) mozjpeg_fcts.jpeg_write_scanlines(&cinfo_out, buffer, 1);
}
mozjpeg_fcts.jpeg_finish_decompress(&cinfo_in);
mozjpeg_fcts.jpeg_finish_compress(&cinfo_out);
}